loncom/cgi/mimeTeX/mimetex.c - view

File: [LON-CAPA] / loncom / cgi / mimeTeX / mimetex.c
Revision 1.5: download - view: text, annotated - select for diffs
Sat Jun 9 00:58:11 2012 UTC (12 years, 1 month ago) by raeburn
Branches: MAIN
CVS tags: version_2_12_X, version_2_11_X, version_2_11_5, version_2_11_4_uiuc, version_2_11_4_msu, version_2_11_4, version_2_11_3_uiuc, version_2_11_3_msu, version_2_11_3, version_2_11_2_uiuc, version_2_11_2_msu, version_2_11_2_educog, version_2_11_2, version_2_11_1, version_2_11_0_RC3, version_2_11_0_RC2, version_2_11_0_RC1, version_2_11_0, HEAD

- upgrade to 1.74.

1: /**************************************************************************** 2: * 3: * Copyright(c) 2002-2012, John Forkosh Associates, Inc. All rights reserved. 4: * http://www.forkosh.com mailto: john@forkosh.com 5: * -------------------------------------------------------------------------- 6: * This file is part of mimeTeX, which is free software. You may redistribute 7: * and/or modify it under the terms of the GNU General Public License, 8: * version 3 or later, as published by the Free Software Foundation. 9: * MimeTeX is distributed in the hope that it will be useful, but 10: * WITHOUT ANY WARRANTY, not even the implied warranty of MERCHANTABILITY. 11: * See the GNU General Public License for specific details. 12: * By using mimeTeX, you warrant that you have read, understood and 13: * agreed to these terms and conditions, and that you possess the legal 14: * right and ability to enter into this agreement and to use mimeTeX 15: * in accordance with it. 16: * Your mimetex.zip distribution file should contain the file COPYING, 17: * an ascii text copy of the GNU General Public License, version 3. 18: * If not, point your browser to http://www.gnu.org/licenses/ 19: * or write to the Free Software Foundation, Inc., 20: * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 21: * -------------------------------------------------------------------------- 22: * 23: * Purpose: o MimeTeX, licensed under the gpl, lets you easily embed 24: * LaTeX math in your html pages. It parses a LaTeX math 25: * expression and immediately emits the corresponding gif 26: * image, rather than the usual TeX dvi. And mimeTeX is an 27: * entirely separate little program that doesn't use TeX or 28: * its fonts in any way. It's just one cgi that you put in 29: * your site's cgi-bin/ directory, with no other dependencies. 30: * So mimeTeX is very easy to install. And it's equally 31: * easy to use. Just place an html <img> tag in your document 32: * wherever you want to see the corresponding LaTeX expression. 33: * For example, 34: * <img src="../cgi-bin/mimetex.cgi?\int_{-\infty}^xe^{-t^2}dt" 35: * alt="" border=0 align=middle> 36: * immediately generates the corresponding gif image on-the-fly, 37: * displaying the rendered expression wherever you put that 38: * <img> tag. 39: * MimeTeX doesn't need intermediate dvi-to-gif conversion, 40: * and it doesn't clutter up your filesystem with separate 41: * little gif files for each converted expression. 42: * But image caching is available by using mimeTeX's 43: * -DCACHEPATH=\"path/\" compile option (see below). 44: * There's also no inherent need to repeatedly write the 45: * cumbersome <img> tag illustrated above. You can write 46: * your own custom tags, or write a wrapper script around 47: * mimeTeX to simplify the notation. 48: * Further discussion about mimeTeX's features and 49: * usage is available on its homepage, 50: * http://www.forkosh.com/mimetex.html 51: * and similarly in mimetex.html included with your mimetex.zip 52: * distribution file. (Note: http://www.forkosh.com/mimetex.html 53: * is a "quickstart" version of the the full mimetex.html manual 54: * included in your mimetex.zip distribution file.) 55: * 56: * Functions: The following "table of contents" lists each function 57: * comprising mimeTeX in the order it appears in this file. 58: * See individual function entry points for specific comments 59: * about its purpose, calling sequence, side effects, etc. 60: * (All these functions eventually belong in several 61: * different modules, possibly along the lines suggested 62: * by the divisions below. But until the best decomposition 63: * becomes clear, it seems better to keep mimetex.c 64: * neatly together, avoiding a bad decomposition that 65: * becomes permanent by default.) 66: * ===================== Raster Functions ====================== 67: * PART2 --- raster constructor functions --- 68: * new_raster(width,height,pixsz) allocation (and constructor) 69: * new_subraster(width,height,pixsz)allocation (and constructor) 70: * new_chardef() allocate chardef struct 71: * delete_raster(rp) deallocate raster (rp = raster ptr) 72: * delete_subraster(sp) deallocate subraster (sp=subraster ptr) 73: * delete_chardef(cp) deallocate chardef (cp = chardef ptr) 74: * --- primitive (sub)raster functions --- 75: * rastcpy(rp) allocate new copy of rp 76: * subrastcpy(sp) allocate new copy of sp 77: * rastrot(rp) new raster rotated right 90 degrees to rp 78: * rastmag(rp,magstep) new raster magnified by "magstep" to rp 79: * bytemapmag(bytemap,width,height,magstep) magnify bytemap 80: * rastref(rp,axis) new raster reflected (axis 1=horz,2=vert) 81: * rastput(target,source,top,left,isopaque) overlay src on trgt 82: * rastcompose(sp1,sp2,offset2,isalign,isfree) sp2 on top of sp1 83: * rastcat(sp1,sp2,isfree) concatanate sp1||sp2 84: * rastack(sp1,sp2,base,space,iscenter,isfree)stack sp2 atop sp1 85: * rastile(tiles,ntiles) create composite raster from tiles 86: * rastsmash(sp1,sp2,xmin,ymin) calc #smash pixels sp1||sp2 87: * rastsmashcheck(term) check if term is "safe" to smash 88: * --- raster "drawing" functions --- 89: * accent_subraster(accent,width,height,direction,pixsz)\hat\vec 90: * arrow_subraster(width,height,drctn,isBig) left/right arrow 91: * uparrow_subraster(width,height,drctn,isBig) up/down arrow 92: * rule_raster(rp,top,left,width,height,type) draw rule in rp 93: * line_raster(rp,row0,col0,row1,col1,thickness) draw line in rp 94: * line_recurse(rp,row0,col0,row1,col1,thickness) recurse line 95: * circle_raster(rp,row0,col0,row1,col1,thickness,quads) ellipse 96: * circle_recurse(rp,row0,col0,row1,col1,thickness,theta0,theta1) 97: * bezier_raster(rp,r0,c0,r1,c1,rt,ct) draw bezier recursively 98: * border_raster(rp,ntop,nbot,isline,isfree)put border around rp 99: * backspace_raster(rp,nback,pback,minspace,isfree) neg space 100: * --- raster (and chardef) output functions --- 101: * type_raster(rp,fp) emit ascii dump of rp on file ptr fp 102: * type_bytemap(bp,grayscale,width,height,fp) dump bytemap on fp 103: * xbitmap_raster(rp,fp) emit mime xbitmap of rp on fp 104: * type_pbmpgm(rp,ptype,file) pbm or pgm image of rp to file 105: * cstruct_chardef(cp,fp,col1) emit C struct of cp on fp 106: * cstruct_raster(rp,fp,col1) emit C struct of rp on fp 107: * hex_bitmap(rp,fp,col1,isstr)emit hex dump of rp->pixmap on fp 108: * --- ancillary output functions --- 109: * emit_string(fp,col1,string,comment) emit string and C comment 110: * gftobitmap(rp) convert .gf-like pixmap to bitmap image 111: * ====================== Font Functions ======================= 112: * --- font lookup functions --- 113: * get_symdef(symbol) return mathchardef for symbol 114: * get_ligature(expr,family) return symtable index for ligature 115: * get_chardef(symdef,size) return chardef for symdef,size 116: * get_charsubraster(symdef,size) wrap subraster around chardef 117: * get_symsubraster(symbol,size) returns subraster for symbol 118: * --- ancillary font functions --- 119: * get_baseline(gfdata) determine baseline (in our coords) 120: * get_delim(symbol,height,family) delim just larger than height 121: * make_delim(symbol,height) construct delim exactly height size 122: * ================= Tokenize/Parse Functions ================== 123: * texchar(expression,chartoken) retruns next char or \sequence 124: * texsubexpr(expr,subexpr,maxsubsz,left,right,isescape,isdelim) 125: * texleft(expr,subexpr,maxsubsz,ldelim,rdelim) \left...\right 126: * texscripts(expression,subscript,superscript,which)get scripts 127: * --- ancillary parse functions --- 128: * isbrace(expression,braces,isescape) check for leading brace 129: * preamble(expression,size,subexpr) parse preamble 130: * mimeprep(expression) preprocessor converts \left( to \(, etc. 131: * strchange(nfirst,from,to) change nfirst chars of from to to 132: * strreplace(string,from,to,nreplace) change from to to in str 133: * strwstr(string,substr,white,sublen) find substr in string 134: * strdetex(s,mode) replace math chars like \^_{} for display 135: * strtexchr(string,texchr) find texchr in string 136: * findbraces(expression,command) find opening { or closing } 137: * strpspn(s,reject,segment) non-() chars of s not in reject 138: * isstrstr(string,snippets,iscase) are any snippets in string? 139: * isnumeric(s) determine if s is an integer 140: * evalterm(store,term) evaluate numeric value of expression 141: * getstore(store,identifier)return value corresponding to ident 142: * unescape_url(url,isescape), x2c(what) xlate %xx url-encoded 143: * PART3 =========== Rasterize an Expression (recursively) =========== 144: * --- here's the primary entry point for all of mimeTeX --- 145: * rasterize(expression,size) parse and rasterize expression 146: * --- explicitly called handlers that rasterize... --- 147: * rastparen(subexpr,size,basesp) parenthesized subexpr 148: * rastlimits(expression,size,basesp) dispatch super/sub call 149: * rastscripts(expression,size,basesp) super/subscripted exprssn 150: * rastdispmath(expression,size,sp) scripts for displaymath 151: * --- table-driven handlers that rasterize... --- 152: * rastleft(expression,size,basesp,ildelim,arg2,arg3)\left\right 153: * rastright(expression,size,basesp,ildelim,arg2,arg3) ...\right 154: * rastmiddle(expression,size,basesp,arg1,arg2,arg3) \middle 155: * rastflags(expression,size,basesp,flag,value,arg3) set flag 156: * rastspace(expression,size,basesp,width,isfill,isheight)\,\:\; 157: * rastnewline(expression,size,basesp,arg1,arg2,arg3) \\ 158: * rastarrow(expression,size,basesp,width,height,drctn) \longarr 159: * rastuparrow(expression,size,basesp,width,height,drctn)up/down 160: * rastoverlay(expression,size,basesp,overlay,arg2,arg3) \not 161: * rastfrac(expression,size,basesp,isfrac,arg2,arg3) \frac \atop 162: * rastackrel(expression,size,basesp,base,arg2,arg3) \stackrel 163: * rastmathfunc(expression,size,basesp,base,arg2,arg3) \lim,\etc 164: * rastsqrt(expression,size,basesp,arg1,arg2,arg3) \sqrt 165: * rastaccent(expression,size,basesp,accent,isabove,isscript) 166: * rastfont(expression,size,basesp,font,arg2,arg3) \cal{},\scr{} 167: * rastbegin(expression,size,basesp,arg1,arg2,arg3) \begin{} 168: * rastarray(expression,size,basesp,arg1,arg2,arg3) \array 169: * rastpicture(expression,size,basesp,arg1,arg2,arg3) \picture 170: * rastline(expression,size,basesp,arg1,arg2,arg3) \line 171: * rastrule(expression,size,basesp,arg1,arg2,arg3) \rule 172: * rastcircle(expression,size,basesp,arg1,arg2,arg3) \circle 173: * rastbezier(expression,size,basesp,arg1,arg2,arg3) \bezier 174: * rastraise(expression,size,basesp,arg1,arg2,arg3) \raisebox 175: * rastrotate(expression,size,basesp,arg1,arg2,arg3) \rotatebox 176: * rastmagnify(expression,size,basesp,arg1,arg2,arg3) \magnify 177: * rastreflect(expression,size,basesp,arg1,arg2,arg3)\reflectbox 178: * rastfbox(expression,size,basesp,arg1,arg2,arg3) \fbox 179: * rastinput(expression,size,basesp,arg1,arg2,arg3) \input 180: * rastcounter(expression,size,basesp,arg1,arg2,arg3) \counter 181: * rasteval(expression,size,basesp,arg1,arg2,arg3) \eval 182: * rasttoday(expression,size,basesp,arg1,arg2,arg3) \today 183: * rastcalendar(expression,size,basesp,arg1,arg2,arg3) \calendar 184: * rastenviron(expression,size,basesp,arg1,arg2,arg3) \environ 185: * rastmessage(expression,size,basesp,arg1,arg2,arg3) \message 186: * rastnoop(expression,size,basesp,arg1,arg2,arg3) flush \escape 187: * --- helper functions for handlers --- 188: * rastopenfile(filename,mode) opens filename[.tex] in mode 189: * rasteditfilename(filename) edit filename (for security) 190: * rastreadfile(filename,islock,tag,value) read <tag>...</tag> 191: * rastwritefile(filename,tag,value,isstrict)write<tag>...</tag> 192: * calendar(year,month,day) formats one-month calendar string 193: * timestamp(tzdelta,ifmt) formats timestamp string 194: * tzadjust(tzdelta,year,month,day,hour) adjust date/time 195: * daynumber(year,month,day) #days since Monday, Jan 1, 1973 196: * strwrap(s,linelen,tablen)insert \n's and spaces to wrap lines 197: * strnlower(s,n) lowercase the first n chars of string s 198: * urlprune(url,n) http://abc.def.ghi.com/etc-->abc.def.ghi.com 199: * urlncmp(url1,url2,n) compares topmost n levels of two url's 200: * dbltoa(d,npts) double to comma-separated ascii 201: * === Anti-alias completed raster (lowpass) or symbols (ss) === 202: * aalowpass(rp,bytemap,grayscale) lowpass grayscale bytemap 203: * aapnm(rp,bytemap,grayscale) lowpass based on pnmalias.c 204: * aapnmlookup(rp,bytemap,grayscale) aapnm based on aagridnum() 205: * aapatterns(rp,irow,icol,gridnum,patternum,grayscale) call 19, 206: * aapattern1124(rp,irow,icol,gridnum,grayscale)antialias pattrn 207: * aapattern19(rp,irow,icol,gridnum,grayscale) antialias pattern 208: * aapattern20(rp,irow,icol,gridnum,grayscale) antialias pattern 209: * aapattern39(rp,irow,icol,gridnum,grayscale) antialias pattern 210: * aafollowline(rp,irow,icol,direction) looks for a "turn" 211: * aagridnum(rp,irow,icol) calculates gridnum, 0-511 212: * aapatternnum(gridnum) looks up pattern#, 1-51, for gridnum 213: * aalookup(gridnum) table lookup for all possible 3x3 grids 214: * aalowpasslookup(rp,bytemap,grayscale) driver for aalookup() 215: * aasupsamp(rp,aa,sf,grayscale) or by supersampling 216: * aacolormap(bytemap,nbytes,colors,colormap)make colors,colormap 217: * aaweights(width,height) builds "canonical" weight matrix 218: * aawtpixel(image,ipixel,weights,rotate) weight image at ipixel 219: * === miscellaneous === 220: * mimetexsetmsg(newmsglevel,newmsgfp) set msglevel and msgfp 221: * PART1 ========================== Driver =========================== 222: * main(argc,argv) parses math expression and emits mime xbitmap 223: * CreateGifFromEq(expression,gifFileName) entry pt for win dll 224: * ismonth(month) is month current month ("jan"-"dec")? 225: * logger(fp,msglevel,logvars) logs environment variables 226: * emitcache(cachefile,maxage,valign,isbuffer) emit cachefile 227: * readcachefile(cachefile,buffer) read cachefile into buffer 228: * advertisement(expression,mode) wrap expression in ad message 229: * crc16(s) 16-bit crc of string s 230: * md5str(instr) md5 hash library functions 231: * GetPixel(x,y) callback function for gifsave library 232: * 233: * Source: mimetex.c (needs mimetex.h and texfonts.h to compile, 234: * and also needs gifsave.c when compiled with -DAA or -DGIF) 235: * 236: * -------------------------------------------------------------------------- 237: * Notes o See individual function entry points for specific comments 238: * about the purpose, calling sequence, side effects, etc 239: * of each mimeTeX function listed above. 240: * o See bottom of file for main() driver (and "friends"), 241: * and compile as 242: * cc -DAA mimetex.c gifsave.c -lm -o mimetex.cgi 243: * to produce an executable that emits gif images with 244: * anti-aliasing (see Notes below). You may also compile 245: * cc -DGIF mimetex.c gifsave.c -lm -o mimetex.cgi 246: * to produce an executable that emits gif images without 247: * anti-aliasing. Alternatively, compile mimeTeX as 248: * cc -DXBITMAP mimetex.c -lm -o mimetex.cgi 249: * to produce an executable that just emits mime xbitmaps. 250: * In either case you'll need mimetex.h and texfonts.h, 251: * and with -DAA or -DGIF you'll also need gifsave.c 252: * o The font information in texfonts.h was produced by multiple 253: * runs of gfuntype, one run per struct (i.e., one run per font 254: * family at a particular size). Compile gfuntype as 255: * cc gfuntype.c mimetex.c -lm -o gfuntype 256: * See gfuntype.c, and also mimetex.html#fonts, for details. 257: * o For gif images, the gifsave.c library by Sverre H. Huseby 258: * <http://shh.thathost.com> slightly modified by me to allow 259: * (a)sending output to stdout or returning it in memory, 260: * and (b)specifying a transparent background color index, 261: * is included with mimeTeX, and it's documented in 262: * mimetex.html#gifsave 263: * o MimeTeX's principal reusable function is rasterize(), 264: * which takes a string like "f(x)=\int_{-\infty}^xe^{-t^2}dt" 265: * and returns a (sub)raster representing it as a bit or bytemap. 266: * Your application can do anything it likes with this pixel map. 267: * MimeTeX just outputs it, either as a mime xbitmap or as a gif. 268: * See mimetex.html#makeraster for further discussion 269: * and examples. 270: * o File mimetex.c also contains library functions implementing 271: * a raster datatype, functions to manipulate rasterized .mf 272: * fonts (see gfuntype.c which rasterizes .mf fonts), functions 273: * to parse LaTeX expressions, etc. As already mentioned, 274: * a complete list of mimetex.c functions is above. See their 275: * individual entry points below for further comments. 276: * As also mentioned, these functions eventually belong in 277: * several different modules, possibly along the lines suggested 278: * by the divisions above. But until the best decomposition 279: * becomes clear, it seems better to keep mimetex.c 280: * neatly together, avoiding a bad decomposition that 281: * becomes permanent by default. 282: * o Optional compile-line -D defined symbols are documented 283: * in mimetex.html#options . They include (additional -D 284: * switches are discussed at mimetex.html#options)... 285: * -DAA 286: * Turns on gif anti-aliasing with default values 287: * (CENTERWT=32, ADJACENTWT=3, CORNERWT=1) 288: * for the following anti-aliasing parameters... 289: * -DCENTERWT=n 290: * -DADJACENTWT=j 291: * -DCORNERWT=k 292: * *** Note: Ignore these three switches because 293: * *** mimeTeX's current anti-aliasing algorithm 294: * *** no longer uses them (as of version 1.60). 295: * MimeTeX currently provides a lowpass filtering 296: * algorithm for anti-aliasing, which is applied to the 297: * existing set of bitmap fonts. This lowpass filter 298: * applies default weights 299: * 1 2 1 300: * 2 8 2 301: * 1 2 1 302: * to neighboring pixels. The defaults weights are 303: * CENTERWT=8, ADJACENTWT=2 and CORNERWT=1, 304: * which you can adjust to control anti-aliasing. 305: * Lower CENTERWT values will blur/spread out lines 306: * while higher values will tend to sharpen lines. 307: * Experimentation is recommended to determine 308: * what value works best for you. 309: * -DCACHEPATH=\"path/\" 310: * This option saves each rendered image to a file 311: * in directory path/ which mimeTeX reads rather than 312: * re-rendering the same image every time it's given 313: * the same LaTeX expression. Sometimes mimeTeX disables 314: * caching, e.g., expressions containing \input{ } are 315: * re-rendered since the contents of the inputted file 316: * may have changed. If compiled without -DCACHEPATH 317: * mimeTeX always re-renders expressions. This usually 318: * isn't too cpu intensive, but if you have unusually 319: * high hit rates then image caching may be helpful. 320: * The path/ is relative to mimetex.cgi, and must 321: * be writable by it. Files created under path/ are 322: * named filename.gif, where filename is the 32-character 323: * MD5 hash of the LaTeX expression. 324: * -DDEFAULTSIZE=n 325: * MimeTeX currently has eight font sizes numbered 0-7, 326: * and always starts in DEFAULTSIZE whose default value 327: * is 3 (corresponding to \large). Specify -DDEFAULTSIZE=4 328: * on the compile line if you prefer mimeTeX to start in 329: * larger default size 4 (corresponding to \Large), etc. 330: * -DDISPLAYSIZE=n 331: * By default, operator limits like \int_a^b are rendered 332: * \textstyle at font sizes \normalsize and smaller, 333: * and rendered \displaystyle at font sizes \large and 334: * larger. This default corresponds to -DDISPLAYSIZE=3, 335: * which you can adjust; e.g., -DDISPLAYSIZE=0 always 336: * defaults to \displaystyle, and 99 (or any large number) 337: * always defaults to \textstyle. Note that explicit 338: * \textstyle, \displaystyle, \limits or \nolimits 339: * directives in an expression always override 340: * the DISPLAYSIZE default. 341: * -DERRORSTATUS=n 342: * The default, 0, means mimeTeX always exits with status 0, 343: * regardless of whether or not it detects error(s) while 344: * trying to render your expression. Specify any non-zero 345: * value (typically -1) if you write a script/plugin for 346: * mimeTeX that traps non-zero exit statuses. MimeTeX then 347: * exits with its own non-zero status when it detects an 348: * error it can identify, or with your ERRORSTATUS value 349: * for errors it can't specifically identify. 350: * -DREFERER=\"domain\" -or- 351: * -DREFERER=\"domain1,domain2,etc\" 352: * Blocks mimeTeX requests from unauthorized domains that 353: * may be using your server's mimetex.cgi without permission. 354: * If REFERER is defined, mimeTeX checks for the environment 355: * variable HTTP_REFERER and, if it exists, performs a 356: * case-insensitive test to make sure it contains 'domain' 357: * as a substring. If given several 'domain's (second form) 358: * then HTTP_REFERER must contain either 'domain1' or 359: * 'domain2', etc, as a (case-insensitive) substring. 360: * If HTTP_REFERER fails to contain a substring matching 361: * any of these domain(s), mimeTeX emits an error message 362: * image corresponding to the expression specified by 363: * the invalid_referer_msg string defined in main(). 364: * Note: if HTTP_REFERER is not an environment variable, 365: * mimeTeX correctly generates the requested expression 366: * (i.e., no referer error). 367: * -DWARNINGS=n -or- 368: * -DNOWARNINGS 369: * If an expression submitted to mimeTeX contains an 370: * unrecognzied escape sequence, e.g., "y=x+\abc+1", then 371: * mimeTeX generates a gif image containing an embedded 372: * warning in the form "y=x+[\abc?]+1". If you want these 373: * warnings suppressed, -DWARNINGS=0 or -DNOWARNINGS tells 374: * mimeTeX to ignore unrecognized symbols, and the rendered 375: * image is "y=x++1" instead. 376: * -DWHITE 377: * MimeTeX usually renders black symbols on a white 378: * background. This option renders white symbols on 379: * a black background instead. 380: * -------------------------------------------------------------------------- 381: * Revision History: 382: * 09/18/02 J.Forkosh Installation. 383: * 12/11/02 J.Forkosh Version 1.00 released. 384: * 07/04/03 J.Forkosh Version 1.01 released. 385: * 10/17/03 J.Forkosh Version 1.20 released. 386: * 12/21/03 J.Forkosh Version 1.30 released. 387: * 02/01/04 J.Forkosh Version 1.40 released. 388: * 10/02/04 J.Forkosh Version 1.50 released. 389: * 11/30/04 J.Forkosh Version 1.60 released. 390: * 10/11/05 J.Forkosh Version 1.64 released. 391: * 11/30/06 J.Forkosh Version 1.65 released. 392: * 09/06/08 J.Forkosh Version 1.70 released. 393: * 03/23/09 J.Forkosh Version 1.71 released. 394: * 11/18/09 J.Forkosh Version 1.72 released. 395: * 11/15/11 J.Forkosh Version 1.73 released. 396: * 02/15/12 J.Forkosh Version 1.74 released. 397: * 03/31/12 J.Forkosh Most recent revision (also see REVISIONDATE) 398: * See http://www.forkosh.com/mimetexchangelog.html for further details. 399: * 400: ****************************************************************************/ 401: 402: /* ------------------------------------------------------------------------- 403: Program id 404: -------------------------------------------------------------------------- */ 405: #define VERSION "1.74" /* mimeTeX version number */ 406: #define REVISIONDATE "31 March 2012" /* date of most recent revision */ 407: #define COPYRIGHTTEXT "Copyright(c) 2002-2012, John Forkosh Associates, Inc" 408: 409: /* ------------------------------------------------------------------------- 410: header files and macros 411: -------------------------------------------------------------------------- */ 412: /* --- standard headers --- */ 413: #include <stdio.h> 414: #include <stdlib.h> 415: /*#include <unistd.h>*/ 416: #include <string.h> 417: #include <ctype.h> 418: #include <math.h> 419: #include <time.h> 420: extern char **environ; /* for \environment directive */ 421: 422: /* ------------------------------------------------------------------------- 423: messages (used mostly by main() and also by rastmessage()) 424: -------------------------------------------------------------------------- */ 425: static char *copyright1 = /* copyright, gnu/gpl notice */ 426: "+-----------------------------------------------------------------------+\n" 427: "|mimeTeX vers " VERSION ", " COPYRIGHTTEXT "|\n" 428: "+-----------------------------------------------------------------------+\n" 429: "| mimeTeX is free software, licensed to you under terms of the GNU/GPL, |\n" 430: "| and comes with absolutely no warranty whatsoever. |", 431: *copyright2 = 432: "| See http://www.forkosh.com/mimetex.html for details. |\n" 433: "+-----------------------------------------------------------------------+"; 434: static int maxmsgnum = 3, /* maximum msgtable[] index */ 435: /* --- keep these message numbers updated if table changes --- */ 436: invmsgnum = 0, /* general invalid message */ 437: refmsgnum = 3; /* urlncmp() failed to validate */ 438: static char *msgtable[] = { /* messages referenced by [index] */ 439: "\\red\\small\\rm\\fbox{\\array{" /* [0] is invalid_referer_msg */ 440: "Please~read~www.forkosh.com/mimetex.html\\\\and~install~mimetex.cgi~" 441: "on~your~own~server.\\\\Thank~you,~John~Forkosh}}", 442: "\\red\\small\\rm\\fbox{\\array{" /* [1] */ 443: "Please~provide~your~{\\tiny~HTTP-REFERER}~to~access~the~public\\\\" 444: "mimetex~server.~~Or~please~read~~www.forkosh.com/mimetex.html\\\\" 445: "and~install~mimetex.cgi~on~your~own~server.~~Thank~you,~John~Forkosh}}", 446: "\\red\\small\\rm\\fbox{\\array{" /* [2] */ 447: "The~public~mimetex~server~is~for~testing.~~For~production,\\\\" 448: "please~read~~www.forkosh.com/mimetex.html~~and~install\\\\" 449: "mimetex.cgi~on~your~own~server.~~Thank~you,~John~Forkosh}}", 450: "\\red\\small\\rm\\fbox{\\array{" /* [3] */ 451: "Only~SERVER_NAME~may~use~mimetex~on~this~server.\\\\" 452: "Please~read~~www.forkosh.com/mimetex.html~~and~install\\\\" 453: "mimetex.cgi~on~your~own~server.~~Thank~you,~John~Forkosh}}", 454: NULL } ; /* trailer */ 455: 456: /* ------------------------------------------------------------------------- 457: additional symbols 458: -------------------------------------------------------------------------- */ 459: /* --- 460: * windows-specific header info 461: * ---------------------------- */ 462: #ifndef WINDOWS /* -DWINDOWS not supplied by user */ 463: #if defined(_WINDOWS) || defined(_WIN32) || defined(WIN32) \ 464: || defined(DJGPP) /* try to recognize windows compilers */ \ 465: || defined(_USRDLL) /* must be WINDOWS if compiling for DLL */ 466: #define WINDOWS /* signal windows */ 467: #endif 468: #endif 469: #ifdef WINDOWS /* Windows opens stdout in char mode, and */ 470: #include <fcntl.h> /* precedes every 0x0A with spurious 0x0D.*/ 471: #include <io.h> /* So emitcache() issues a Win _setmode() */ 472: /* call to put stdout in binary mode. */ 473: #if defined(_O_BINARY) && !defined(O_BINARY) /* only have _O_BINARY */ 474: #define O_BINARY _O_BINARY /* make O_BINARY available, etc... */ 475: #define setmode _setmode 476: #define fileno _fileno 477: #endif 478: #if defined(_O_BINARY) || defined(O_BINARY) /* setmode() now available */ 479: #define HAVE_SETMODE /* so we'll use setmode() */ 480: #endif 481: #if defined(_MSC_VER) && defined(_DEBUG) /* MS VC++ in debug mode */ 482: /* to show source file and line numbers where memory leaks occur... */ 483: #define _CRTDBG_MAP_ALLOC /* ...include this debug macro */ 484: #include <crtdbg.h> /* and this debug library */ 485: #endif 486: #define ISWINDOWS 1 487: #else 488: #define ISWINDOWS 0 489: #endif 490: 491: /* --- 492: * check for supersampling or low-pass anti-aliasing 493: * ------------------------------------------------- */ 494: #ifdef SS 495: #define ISSUPERSAMPLING 1 496: #ifndef AAALGORITHM 497: #define AAALGORITHM 1 /* default supersampling algorithm */ 498: #endif 499: #ifndef AA /* anti-aliasing not explicitly set */ 500: #define AA /* so define it ourselves */ 501: #endif 502: #ifndef SSFONTS /* need supersampling fonts */ 503: #define SSFONTS 504: #endif 505: #else 506: #define ISSUPERSAMPLING 0 507: #ifndef AAALGORITHM 508: #define AAALGORITHM 3 /*2*/ /* default lowpass algorithm */ 509: #endif 510: #endif 511: #ifndef MAXFOLLOW 512: #define MAXFOLLOW 8 /* aafollowline() maxturn default */ 513: #endif 514: 515: /* --- 516: * set aa (and default gif) if any anti-aliasing options specified 517: * --------------------------------------------------------------- */ 518: #if defined(AA) || defined(GIF) || defined(PNG) \ 519: || defined(CENTERWT) || defined(ADJACENTWT) || defined(CORNERWT) \ 520: || defined(MINADJACENT) || defined(MAXADJACENT) 521: #if !defined(GIF) && !defined(AA) /* aa not explicitly specified */ 522: #define AA /* so define it ourselves */ 523: #endif 524: #if !defined(GIF) && !defined(PNG) /* neither gif nor png specified */ 525: #define GIF /* so default to gif */ 526: #endif 527: #endif 528: /* --- resolve output option inconsistencies --- */ 529: #if defined(XBITMAP) /* xbitmap supercedes gif and png */ 530: #ifdef AA 531: #undef AA 532: #endif 533: #ifdef GIF 534: #undef GIF 535: #endif 536: #ifdef PNG 537: #undef PNG 538: #endif 539: #endif 540: 541: /* --- 542: * decide whether or not to compile main() 543: * --------------------------------------- */ 544: #if defined(XBITMAP) || defined(GIF) || defined(PNG) 545: /* --- yes, compile main() --- */ 546: #define DRIVER /* main() driver will be compiled */ 547: #else /* --- main() won't be compiled (e.g., for gfuntype.c) --- */ 548: #ifndef TEXFONTS 549: #define NOTEXFONTS /* texfonts not required */ 550: #endif 551: #endif 552: 553: /* --- 554: * application headers 555: * ------------------- */ 556: #if !defined(NOTEXFONTS) && !defined(TEXFONTS) 557: #define TEXFONTS /* to include texfonts.h */ 558: #endif 559: #include "mimetex.h" 560: 561: /* --- 562: * info needed when gif image returned in memory buffer 563: * ---------------------------------------------------- */ 564: #ifdef GIF /* compiling along with gifsave.c */ 565: extern int gifSize; 566: extern int maxgifSize; 567: #else /* or just set dummy values */ 568: static int gifSize=0, maxgifSize=0; 569: #endif 570: /* --- gamma correction --- */ 571: #ifndef GAMMA 572: #define GAMMA 1.25 /*1.75*/ /*2.2*/ 573: #endif 574: #ifndef REVERSEGAMMA 575: #define REVERSEGAMMA 0.5 /* for \reverse white-on-black */ 576: #endif 577: /* --- opaque background (default to transparent) --- */ 578: #ifndef OPAQUE 579: #define ISTRANSPARENT 1 580: #else 581: #define ISTRANSPARENT 0 582: #endif 583: 584: /* --- 585: * internal buffer sizes 586: * --------------------- */ 587: #if !defined(MAXEXPRSZ) 588: #define MAXEXPRSZ (32768-1) /*max #bytes in input tex expression*/ 589: #endif 590: #if !defined(MAXSUBXSZ) 591: #define MAXSUBXSZ (((MAXEXPRSZ+1)/2)-1)/*max #bytes in input subexpression*/ 592: #endif 593: #if !defined(MAXTOKNSZ) 594: #define MAXTOKNSZ (((MAXSUBXSZ+1)/4)-1) /* max #bytes in input token */ 595: #endif 596: #if !defined(MAXFILESZ) 597: #define MAXFILESZ (65536-1) /*max #bytes in input (output) file*/ 598: #endif 599: #if !defined(MAXLINESZ) 600: #define MAXLINESZ (4096-1) /* max #chars in line from file */ 601: #endif 602: #if !defined(MAXGIFSZ) 603: #define MAXGIFSZ 131072 /* max #bytes in output GIF image */ 604: #endif 605: 606: /* ------------------------------------------------------------------------- 607: adjustable default values 608: -------------------------------------------------------------------------- */ 609: /* --- 610: * anti-aliasing parameters 611: * ------------------------ */ 612: #ifndef CENTERWT 613: /*#define CENTERWT 32*/ /* anti-aliasing centerwt default */ 614: /*#define CENTERWT 10*/ /* anti-aliasing centerwt default */ 615: #define CENTERWT 8 /* anti-aliasing centerwt default */ 616: #endif 617: #ifndef ADJACENTWT 618: /*#define ADJACENTWT 3*/ /* anti-aliasing adjacentwt default*/ 619: #define ADJACENTWT 2 /* anti-aliasing adjacentwt default*/ 620: #endif 621: #ifndef CORNERWT 622: #define CORNERWT 1 /* anti-aliasing cornerwt default*/ 623: #endif 624: #ifndef MINADJACENT 625: #define MINADJACENT 6 /*anti-aliasing minadjacent default*/ 626: #endif 627: #ifndef MAXADJACENT 628: #define MAXADJACENT 8 /*anti-aliasing maxadjacent default*/ 629: #endif 630: /* --- variables for anti-aliasing parameters --- */ 631: GLOBAL(int,centerwt,CENTERWT); /*lowpass matrix center pixel wt */ 632: GLOBAL(int,adjacentwt,ADJACENTWT); /*lowpass matrix adjacent pixel wt*/ 633: GLOBAL(int,cornerwt,CORNERWT); /*lowpass matrix corner pixel wt */ 634: GLOBAL(int,minadjacent,MINADJACENT); /* darken if>=adjacent pts black*/ 635: GLOBAL(int,maxadjacent,MAXADJACENT); /* darken if<=adjacent pts black */ 636: GLOBAL(int,weightnum,1); /* font wt, */ 637: GLOBAL(int,maxaaparams,4); /* #entries in table */ 638: /* --- anti-aliasing parameter values by font weight --- */ 639: #define aaparameters struct aaparameters_struct /* typedef */ 640: aaparameters 641: { int centerwt; /* lowpass matrix center pixel wt*/ 642: int adjacentwt; /* lowpass matrix adjacent pixel wt*/ 643: int cornerwt; /* lowpass matrix corner pixel wt*/ 644: int minadjacent; /* darken if >= adjacent pts black */ 645: int maxadjacent; /* darken if <= adjacent pts black */ 646: int fgalias,fgonly,bgalias,bgonly; } ; /* aapnm() params */ 647: STATIC aaparameters aaparams[] /* set params by weight */ 648: #ifdef INITVALS 649: = 650: { /* ---------------------------------------------------- 651: centerwt adj corner minadj max fgalias,only,bgalias,only 652: ------------------------------------------------------- */ 653: { 64, 1, 1, 6, 8, 1,0,0,0 }, /* 0 = light */ 654: { CENTERWT,ADJACENTWT,CORNERWT,MINADJACENT,MAXADJACENT,1,0,0,0 }, 655: { 8, 1, 1, 5, 8, 1,0,0,0 }, /* 2 = semibold */ 656: { 8, 2, 1, 4, 9, 1,0,0,0 } /* 3 = bold */ 657: } /* --- end-of-aaparams[] --- */ 658: #endif 659: ; 660: /* --- anti-aliasing diagnostics (to help improve algorithm) --- */ 661: STATIC int patternnumcount0[99], patternnumcount1[99], /*aalookup() counts*/ 662: ispatternnumcount = 1; /* true to accumulate counts */ 663: 664: /* ------------------------------------------------------------------------- 665: other variables 666: -------------------------------------------------------------------------- */ 667: /* --- black on white background (default), or white on black --- */ 668: #ifdef WHITE 669: #define ISBLACKONWHITE 0 /* white on black background */ 670: #else 671: #define ISBLACKONWHITE 1 /* black on white background */ 672: #endif 673: /* --- colors --- */ 674: #define BGRED (ISBLACKONWHITE?255:0) 675: #define BGGREEN (ISBLACKONWHITE?255:0) 676: #define BGBLUE (ISBLACKONWHITE?255:0) 677: #ifndef FGRED 678: #define FGRED (ISBLACKONWHITE?0:255) 679: #endif 680: #ifndef FGGREEN 681: #define FGGREEN (ISBLACKONWHITE?0:255) 682: #endif 683: #ifndef FGBLUE 684: #define FGBLUE (ISBLACKONWHITE?0:255) 685: #endif 686: /* --- advertisement 687: one image in every ADFREQUENCY is wrapped in "advertisement" --- */ 688: #if !defined(ADFREQUENCY) 689: #define ADFREQUENCY 0 /* never show advertisement if 0 */ 690: #endif 691: #ifndef HOST_SHOWAD 692: #define HOST_SHOWAD "\000" /* show ads on all hosts */ 693: #endif 694: /* --- "smash" margin (0 means no smashing) --- */ 695: #ifndef SMASHMARGIN 696: #ifdef NOSMASH 697: #define SMASHMARGIN 0 698: #else 699: #define SMASHMARGIN 3 700: #endif 701: #endif 702: #ifndef SMASHCHECK 703: #define SMASHCHECK 0 704: #endif 705: /* --- textwidth --- */ 706: #ifndef TEXTWIDTH 707: #define TEXTWIDTH (400) 708: #endif 709: /* --- font "combinations" --- */ 710: #define CMSYEX (109) /*select CMSY10, CMEX10 or STMARY10*/ 711: /* --- prefix prepended to all expressions --- */ 712: #ifndef PREFIX 713: #define PREFIX "\000" /* default no prepended prefix */ 714: #endif 715: /* --- skip argv[]'s preceding ARGSIGNAL when parsing command-line args --- */ 716: #ifdef NOARGSIGNAL 717: #define ARGSIGNAL NULL 718: #endif 719: #ifndef ARGSIGNAL 720: #define ARGSIGNAL "++" 721: #endif 722: /* --- security and logging (inhibit message logging, etc) --- */ 723: #ifndef SECURITY 724: #define SECURITY 999 /* default highest security level */ 725: #endif 726: #ifndef LOGFILE 727: #define LOGFILE "mimetex.log" /* default log file */ 728: #endif 729: #ifndef CACHELOG 730: #define CACHELOG "mimetex.log" /* default caching log file */ 731: #endif 732: #if !defined(NODUMPENVP) && !defined(DUMPENVP) 733: #define DUMPENVP /* assume char *envp[] available */ 734: #endif 735: /* --- max query_string length if no http_referer supplied --- */ 736: #ifndef NOREFMAXLEN 737: #define NOREFMAXLEN 9999 /* default to any length query */ 738: #endif 739: #ifndef NOREFSAFELEN 740: #define NOREFSAFELEN 24 /* too small for hack exploit */ 741: #endif 742: /* --- check whether or not to perform http_referer check --- */ 743: #ifdef REFERER /* only specified referers allowed */ 744: #undef NOREFMAXLEN 745: #define NOREFMAXLEN NOREFSAFELEN 746: #else /* all http_referer's allowed */ 747: #define REFERER NULL 748: #endif 749: /* --- check top levels of http_referer against server_name --- */ 750: #ifdef REFLEVELS /* #topmost levels to check */ 751: #undef NOREFMAXLEN 752: #define NOREFMAXLEN NOREFSAFELEN 753: #else 754: #ifdef NOREFCHECK 755: #define REFLEVELS 0 /* don't match host and referer */ 756: #else 757: #define REFLEVELS 3 /* default matches abc.def.com */ 758: #endif 759: #endif 760: /* --- check whether or not \input, \counter, \environment permitted --- */ 761: #ifdef DEFAULTSECURITY /* default security specified */ 762: #define EXPLICITDEFSECURITY /* don't override explicit default */ 763: #else /* defualt security not specified */ 764: #define DEFAULTSECURITY (8) /* so set default security level */ 765: #endif 766: #ifdef INPUTREFERER /*http_referer's permitted to \input*/ 767: #ifndef INPUTSECURITY /* so we need to permit \input{} */ 768: #define INPUTSECURITY (99999) /* make sure SECURITY<INPUTSECURITY */ 769: #endif 770: #else /* no INPUTREFERER list supplied */ 771: #define INPUTREFERER NULL /* so init it as NULL pointer */ 772: #endif 773: #ifndef INPUTPATH /* \input{} paths permitted for... */ 774: #define INPUTPATH NULL /* ...any referer */ 775: #endif 776: #ifndef INPUTSECURITY /* \input{} security not specified */ 777: #ifdef INPUTOK /* but INPUTOK flag specified */ 778: #define INPUTSECURITY (99999) /* so enable \input{} */ 779: #ifndef EXPLICITDEFSECURITY /* don't override explicit default */ 780: #undef DEFAULTSECURITY /* but we'll override our default */ 781: #define DEFAULTSECURITY (99999) /*let -DINPUTOK enable \counter,etc*/ 782: #endif 783: #else /* else no \input{} specified */ 784: #define INPUTSECURITY DEFAULTSECURITY /* set default \input security */ 785: #endif 786: #endif 787: #ifndef COUNTERSECURITY /*\counter{} security not specified*/ 788: #ifdef COUNTEROK /* but COUNTEROK flag specified */ 789: #define COUNTERSECURITY (99999) /* so enable \counter{} */ 790: #else /* else no \counter{} specified */ 791: #define COUNTERSECURITY DEFAULTSECURITY /*set default \counter security*/ 792: #endif 793: #endif 794: #ifndef ENVIRONSECURITY /* \environ security not specified */ 795: #ifdef ENVIRONOK /* but ENVIRONOK flag specified */ 796: #define ENVIRONSECURITY (99999) /* so enable \environ */ 797: #else /* else no \environ specified */ 798: #define ENVIRONSECURITY DEFAULTSECURITY /*set default \environ security*/ 799: #endif 800: #endif 801: /* --- image caching (cache images if given -DCACHEPATH=\"path\") --- */ 802: #ifndef CACHEPATH 803: #define ISCACHING 0 /* no caching */ 804: #define CACHEPATH "\000" /* same directory as mimetex.cgi */ 805: #else 806: #define ISCACHING 1 /* caching if -DCACHEPATH="path" */ 807: #endif 808: /* --- \input paths (prepend prefix if given -DPATHPREFIX=\"prefix\") --- */ 809: #ifndef PATHPREFIX 810: #define PATHPREFIX "\000" /* paths relative mimetex.cgi */ 811: #endif 812: /* --- time zone delta t (in hours) --- */ 813: #ifndef TZDELTA 814: #define TZDELTA 0 815: #endif 816: /* --- treat +'s in query string as blanks? --- */ 817: #ifdef PLUSBLANK /* + always interpreted as blank */ 818: #define ISPLUSBLANK 1 819: #else 820: #ifdef PLUSNOTBLANK /* + never interpreted as blank */ 821: #define ISPLUSBLANK 0 822: #else /* program tries to determine */ 823: #define ISPLUSBLANK (-1) 824: #endif 825: #endif 826: 827: /* ------------------------------------------------------------------------- 828: debugging and logging / error reporting 829: -------------------------------------------------------------------------- */ 830: /* --- debugging and error reporting --- */ 831: #ifndef MSGLEVEL 832: #define MSGLEVEL 1 833: #endif 834: #define DBGLEVEL 9 /* debugging if msglevel>=DBGLEVEL */ 835: #define LOGLEVEL 3 /* logging if msglevel>=LOGLEVEL */ 836: #ifndef FORMLEVEL 837: #define FORMLEVEL LOGLEVEL /*msglevel if called from html form*/ 838: #endif 839: #ifndef ERRORSTATUS /* exit(ERRORSTATUS) for any error */ 840: #define ERRORSTATUS 0 /* default doesn't signal errors */ 841: #endif 842: GLOBAL(int,seclevel,SECURITY); /* security level */ 843: GLOBAL(int,inputseclevel,INPUTSECURITY); /* \input{} security level */ 844: GLOBAL(int,counterseclevel,COUNTERSECURITY); /* \counter{} security level */ 845: GLOBAL(int,environseclevel,ENVIRONSECURITY); /* \environ{} security level */ 846: GLOBAL(int,msglevel,MSGLEVEL); /* message level for verbose/debug */ 847: GLOBAL(int,errorstatus,ERRORSTATUS); /* exit status if error encountered*/ 848: GLOBAL(int,exitstatus,0); /* exit status (0=success) */ 849: STATIC FILE *msgfp; /* output in command-line mode */ 850: /* --- embed warnings in rendered expressions, [\xxx?] if \xxx unknown --- */ 851: #ifdef WARNINGS 852: #define WARNINGLEVEL WARNINGS 853: #else 854: #ifdef NOWARNINGS 855: #define WARNINGLEVEL 0 856: #else 857: #define WARNINGLEVEL 1 858: #endif 859: #endif 860: GLOBAL(int,warninglevel,WARNINGLEVEL); /* warning level */ 861: 862: /* ------------------------------------------------------------------------- 863: control flags and values 864: -------------------------------------------------------------------------- */ 865: GLOBAL(int,daemonlevel,0); /* incremented in main() */ 866: GLOBAL(int,recurlevel,0); /* inc/decremented in rasterize() */ 867: GLOBAL(int,scriptlevel,0); /* inc/decremented in rastlimits() */ 868: GLOBAL(int,isstring,0); /*pixmap is ascii string, not raster*/ 869: GLOBAL(int,isligature,0); /* true if ligature found */ 870: GLOBAL(char,*subexprptr,(char *)NULL); /* ptr within expression to subexpr*/ 871: /*SHARED(int,imageformat,1);*/ /* image is 1=bitmap, 2=.gf-like */ 872: GLOBAL(int,isdisplaystyle,1); /* displaystyle mode (forced if 2) */ 873: GLOBAL(int,ispreambledollars,0); /* displaystyle mode set by $$...$$ */ 874: GLOBAL(int,ninputcmds,0); /* # of \input commands processed */ 875: GLOBAL(int,fontnum,0); /* cal=1,scr=2,rm=3,it=4,bb=5,bf=6 */ 876: GLOBAL(int,fontsize,NORMALSIZE); /* current size */ 877: GLOBAL(int,magstep,1); /* magstep (1=no change) */ 878: GLOBAL(int,displaysize,DISPLAYSIZE); /* use \displaystyle when fontsize>=*/ 879: GLOBAL(int,shrinkfactor,3); /* shrinkfactors[fontsize] */ 880: GLOBAL(int,rastlift,0); /* rastraise() lift parameter */ 881: GLOBAL(int,rastlift1,0); /* rastraise() lift for base exprssn*/ 882: GLOBAL(double,unitlength,1.0); /* #pixels per unit (may be <1.0) */ 883: GLOBAL(int,iunitlength,1); /* #pixels per unit as int for store*/ 884: /*GLOBAL(int,textwidth,TEXTWIDTH);*/ /* #pixels across line */ 885: GLOBAL(int,adfrequency,ADFREQUENCY); /* advertisement frequency */ 886: GLOBAL(int,isnocatspace,0); /* >0 to not add space in rastcat()*/ 887: GLOBAL(int,smashmargin,SMASHMARGIN); /* minimum "smash" margin */ 888: GLOBAL(int,mathsmashmargin,SMASHMARGIN); /* needed for \text{if $n-m$ even}*/ 889: GLOBAL(int,issmashdelta,1); /* true if smashmargin is a delta */ 890: GLOBAL(int,isexplicitsmash,0); /* true if \smash explicitly given */ 891: GLOBAL(int,smashcheck,SMASHCHECK); /* check if terms safe to smash */ 892: GLOBAL(int,isnomath,0); /* true to inhibit math mode */ 893: GLOBAL(int,isscripted,0); /* is (lefthand) term text-scripted*/ 894: GLOBAL(int,isdelimscript,0); /* is \right delim text-scripted */ 895: GLOBAL(int,issmashokay,0); /*is leading char okay for smashing*/ 896: #define BLANKSIGNAL (-991234) /*rastsmash signal right-hand blank*/ 897: GLOBAL(int,blanksignal,BLANKSIGNAL); /*rastsmash signal right-hand blank*/ 898: GLOBAL(int,blanksymspace,0); /* extra (or too much) space wanted*/ 899: GLOBAL(int,istransparent,ISTRANSPARENT);/* true sets background transparent*/ 900: GLOBAL(int,fgred,FGRED); 901: GLOBAL(int,fggreen,FGGREEN); 902: GLOBAL(int,fgblue,FGBLUE); /* fg r,g,b */ 903: GLOBAL(int,bgred,BGRED); 904: GLOBAL(int,bggreen,BGGREEN); 905: GLOBAL(int,bgblue,BGBLUE); /* bg r,g,b */ 906: GLOBAL(double,gammacorrection,GAMMA); /* gamma correction */ 907: GLOBAL(int,isplusblank,ISPLUSBLANK); /*interpret +'s in query as blanks?*/ 908: GLOBAL(int,isblackonwhite,ISBLACKONWHITE); /*1=black on white,0=reverse*/ 909: GLOBAL(char,exprprefix[256],PREFIX); /* prefix prepended to expressions */ 910: GLOBAL(int,aaalgorithm,AAALGORITHM); /* for lp, 1=aalowpass, 2 =aapnm */ 911: GLOBAL(int,maxfollow,MAXFOLLOW); /* aafollowline() maxturn parameter*/ 912: GLOBAL(int,fgalias,1); 913: GLOBAL(int,fgonly,0); 914: GLOBAL(int,bgalias,0); 915: GLOBAL(int,bgonly,0); /* aapnm() params */ 916: GLOBAL(int,issupersampling,ISSUPERSAMPLING); /*1=supersampling 0=lowpass*/ 917: GLOBAL(int,isss,ISSUPERSAMPLING); /* supersampling flag for main() */ 918: GLOBAL(int,*workingparam,(int *)NULL); /* working parameter */ 919: GLOBAL(subraster,*workingbox,(subraster *)NULL); /*working subraster box*/ 920: GLOBAL(int,isreplaceleft,0); /* true to replace leftexpression */ 921: GLOBAL(subraster,*leftexpression,(subraster *)NULL); /*rasterized so far*/ 922: GLOBAL(mathchardef,*leftsymdef,NULL); /* mathchardef for preceding symbol*/ 923: GLOBAL(int,fraccenterline,NOVALUE); /* baseline for punct. after \frac */ 924: /*GLOBAL(int,currentcharclass,NOVALUE);*/ /*primarily to check for PUNCTION*/ 925: GLOBAL(int,iscaching,ISCACHING); /* true if caching images */ 926: GLOBAL(char,cachepath[256],CACHEPATH); /* relative path to cached files */ 927: GLOBAL(int,isemitcontenttype,1); /* true to emit mime content-type */ 928: int iscachecontenttype = 0; /* true to cache mime content-type */ 929: char contenttype[2048] = "\000"; /* content-type:, etc buffer */ 930: GLOBAL(char,pathprefix[256],PATHPREFIX); /*prefix for \input,\counter paths*/ 931: /*GLOBAL(int,iswindows,ISWINDOWS);*/ /* true if compiled for ms windows */ 932: 933: /* ------------------------------------------------------------------------- 934: store for evalterm() [n.b., these are stripped-down funcs from nutshell] 935: -------------------------------------------------------------------------- */ 936: #define STORE struct store_struct /* "typedef" for store struct */ 937: #define MAXSTORE 100 /* max 100 identifiers */ 938: STORE { 939: char *identifier; /* identifier */ 940: int *value; /* address of corresponding value */ 941: } ; /* --- end-of-store_struct --- */ 942: static STORE mimestore[MAXSTORE] = { 943: { "fontsize", &fontsize }, { "fs", &fontsize }, /* font size */ 944: { "fontnum", &fontnum }, { "fn", &fontnum }, /* font number */ 945: { "unitlength", &iunitlength }, /* unitlength */ 946: /*{ "mytestvar", &mytestvar },*/ 947: { NULL, NULL } /* end-of-store */ 948: } ; /* --- end-of-mimestore[] --- */ 949: 950: /* ------------------------------------------------------------------------- 951: miscellaneous macros 952: -------------------------------------------------------------------------- */ 953: #if 0 /* --- these are now #define'd in mimetex.h --- */ 954: #define max2(x,y) ((x)>(y)? (x):(y)) /* larger of 2 arguments */ 955: #define min2(x,y) ((x)<(y)? (x):(y)) /* smaller of 2 arguments */ 956: #define max3(x,y,z) max2(max2(x,y),(z)) /* largest of 3 arguments */ 957: #define min3(x,y,z) min2(min2(x,y),(z)) /* smallest of 3 arguments */ 958: #define absval(x) ((x)>=0?(x):(-(x))) /* absolute value */ 959: #define iround(x) ((int)((x)>=0?(x)+0.5:(x)-0.5)) /* round double to int */ 960: #define dmod(x,y) ((x)-((y)*((double)((int)((x)/(y)))))) /*x%y for doubles*/ 961: #endif 962: #define compress(s,c) if((s)!=NULL) /* remove embedded c's from s */ \ 963: { char *p; while((p=strchr((s),(c)))!=NULL) {strsqueeze(p,1);} } else 964: #define slower(s) if ((s)!=NULL) /* lowercase all chars in s */ \ 965: { char *p=(s); while(*p!='\000'){*p=tolower(*p); p++;} } else 966: /*subraster *subrastcpy();*/ /* need global module declaration */ 967: /*#define spnosmash(sp) if (sp->type==CHARASTER) sp=subrastcpy(sp); \ */ 968: /* sp->type=blanksignal */ 969: /* ---evaluate \directive[arg] or \directive{arg} scaled by unitlength--- */ 970: #define eround(arg) (iround(unitlength*((double)evalterm(mimestore,(arg))))) 971: /* --- check if a string is empty --- */ 972: #define isempty(s) ((s)==NULL?1:(*(s)=='\000'?1:0)) 973: /* --- last char of a string --- */ 974: #define lastchar(s) (isempty(s)?'\000':*((s)+(strlen(s)-1))) 975: /* --- lowercase a string --- */ 976: #define strlower(s) strnlower((s),0) /* lowercase an entire string */ 977: /* --- strip leading and trailing whitespace (including ~) --- */ 978: #define trimwhite(thisstr) if ( (thisstr) != NULL ) { \ 979: int thislen = strlen(thisstr); \ 980: while ( --thislen >= 0 ) \ 981: if ( isthischar((thisstr)[thislen]," \t\n\r\f\v") ) \ 982: (thisstr)[thislen] = '\000'; \ 983: else break; \ 984: if ( (thislen = strspn((thisstr)," \t\n\r\f\v")) > 0 ) \ 985: {strsqueeze((thisstr),thislen);} } else 986: /* --- strncpy() n bytes and make sure it's null-terminated --- */ 987: #define strninit(target,source,n) if( (target)!=NULL && (n)>=0 ) { \ 988: char *thissource = (source); \ 989: (target)[0] = '\000'; \ 990: if ( (n)>0 && thissource!=NULL ) { \ 991: strncpy((target),thissource,(n)); \ 992: (target)[(n)] = '\000'; } } 993: /* --- strcpy(s,s+n) using memmove() (also works for negative n) --- */ 994: #define strsqueeze(s,n) if((n)!=0) { if(!isempty((s))) { \ 995: int thislen3=strlen(s); \ 996: if ((n) >= thislen3) *(s) = '\000'; \ 997: else memmove(s,s+(n),1+thislen3-(n)); }} else/*user supplies final;*/ 998: /* --- strsqueeze(s,t) with two pointers --- */ 999: #define strsqueezep(s,t) if(!isempty((s))&&!isempty((t))) { \ 1000: int sqlen=strlen((s))-strlen((t)); \ 1001: if (sqlen>0 && sqlen<=999) {strsqueeze((s),sqlen);} } else 1002: 1003: /* --- 1004: * PART2 1005: * ------ */ 1006: #if !defined(PARTS) || defined(PART2) 1007: /* ========================================================================== 1008: * Function: new_raster ( width, height, pixsz ) 1009: * Purpose: Allocation and constructor for raster. 1010: * mallocs and initializes memory for width*height pixels, 1011: * and returns raster struct ptr to caller. 1012: * -------------------------------------------------------------------------- 1013: * Arguments: width (I) int containing width, in bits, 1014: * of raster pixmap to be allocated 1015: * height (I) int containing height, in bits/scans, 1016: * of raster pixmap to be allocated 1017: * pixsz (I) int containing #bits per pixel, 1 or 8 1018: * -------------------------------------------------------------------------- 1019: * Returns: ( raster * ) ptr to allocated and initialized 1020: * raster struct, or NULL for any error. 1021: * -------------------------------------------------------------------------- 1022: * Notes: 1023: * ======================================================================= */ 1024: /* --- entry point --- */ 1025: raster *new_raster ( int width, int height, int pixsz ) 1026: { 1027: /* ------------------------------------------------------------------------- 1028: Allocations and Declarations 1029: -------------------------------------------------------------------------- */ 1030: raster *rp = (raster *)NULL; /* raster ptr returned to caller */ 1031: pixbyte *pixmap = NULL; /* raster pixel map to be malloced */ 1032: int nbytes = pixsz*bitmapsz(width,height); /* #bytes needed for pixmap */ 1033: int filler = (isstring?' ':0); /* pixmap filler */ 1034: int delete_raster(); /* in case pixmap malloc() fails */ 1035: int npadding = (0&&issupersampling?8+256:0); /* padding bytes */ 1036: /* ------------------------------------------------------------------------- 1037: allocate and initialize raster struct and embedded bitmap 1038: -------------------------------------------------------------------------- */ 1039: if ( msgfp!=NULL && msglevel>=9999 ) 1040: { fprintf(msgfp,"new_raster(%d,%d,%d)> entry point\n", 1041: width,height,pixsz); fflush(msgfp); } 1042: /* --- allocate and initialize raster struct --- */ 1043: rp = (raster *)malloc(sizeof(raster)); /* malloc raster struct */ 1044: if ( msgfp!=NULL && msglevel>=9999 ) 1045: { fprintf(msgfp,"new_raster> rp=malloc(%d) returned (%s)\n", 1046: sizeof(raster),(rp==NULL?"null ptr":"success")); fflush(msgfp); } 1047: if ( rp == (raster *)NULL ) /* malloc failed */ 1048: goto end_of_job; /* return error to caller */ 1049: rp->width = width; /* store width in raster struct */ 1050: rp->height = height; /* and store height */ 1051: rp->format = 1; /* initialize as bitmap format */ 1052: rp->pixsz = pixsz; /* store #bits per pixel */ 1053: rp->pixmap = (pixbyte *)NULL; /* init bitmap as null ptr */ 1054: /* --- allocate and initialize bitmap array --- */ 1055: if ( msgfp!=NULL && msglevel>=9999 ) 1056: { fprintf(msgfp,"new_raster> calling pixmap=malloc(%d)\n", 1057: nbytes); fflush(msgfp); } 1058: if ( nbytes>0 && nbytes<=pixsz*maxraster ) /* fail if width*height too big*/ 1059: pixmap = (pixbyte *)malloc(nbytes+npadding); /*bytes for width*height bits*/ 1060: if ( msgfp!=NULL && msglevel>=9999 ) 1061: { fprintf(msgfp,"new_raster> pixmap=malloc(%d) returned (%s)\n", 1062: nbytes,(pixmap==NULL?"null ptr":"success")); fflush(msgfp); } 1063: if ( pixmap == (pixbyte *)NULL ) /* malloc failed */ 1064: { delete_raster(rp); /* so free everything */ 1065: rp = (raster *)NULL; /* reset pointer */ 1066: goto end_of_job; } /* and return error to caller */ 1067: memset((void *)pixmap,filler,nbytes); /* init bytes to binary 0's or ' 's*/ 1068: *pixmap = (pixbyte)0; /* and first byte alwasy 0 */ 1069: rp->pixmap = pixmap; /* store ptr to malloced memory */ 1070: /* ------------------------------------------------------------------------- 1071: Back to caller with address of raster struct, or NULL ptr for any error. 1072: -------------------------------------------------------------------------- */ 1073: end_of_job: 1074: if ( msgfp!=NULL && msglevel>=9999 ) 1075: { fprintf(msgfp,"new_raster(%d,%d,%d)> returning (%s)\n", 1076: width,height,pixsz,(rp==NULL?"null ptr":"success")); fflush(msgfp); } 1077: return ( rp ); /* back to caller with raster */ 1078: } /* --- end-of-function new_raster() --- */ 1079: 1080: 1081: /* ========================================================================== 1082: * Function: new_subraster ( width, height, pixsz ) 1083: * Purpose: Allocate a new subraster along with 1084: * an embedded raster of width x height. 1085: * -------------------------------------------------------------------------- 1086: * Arguments: width (I) int containing width of embedded raster 1087: * height (I) int containing height of embedded raster 1088: * pixsz (I) int containing #bits per pixel, 1 or 8 1089: * -------------------------------------------------------------------------- 1090: * Returns: ( subraster * ) ptr to newly-allocated subraster, 1091: * or NULL for any error. 1092: * -------------------------------------------------------------------------- 1093: * Notes: o if width or height <=0, embedded raster not allocated 1094: * ======================================================================= */ 1095: /* --- entry point --- */ 1096: subraster *new_subraster ( int width, int height, int pixsz ) 1097: { 1098: /* ------------------------------------------------------------------------- 1099: Allocations and Declarations 1100: -------------------------------------------------------------------------- */ 1101: subraster *sp=NULL; /* subraster returned to caller */ 1102: raster *new_raster(), *rp=NULL; /* image raster embedded in sp */ 1103: int delete_subraster(); /* in case new_raster() fails */ 1104: int size = NORMALSIZE, /* default size */ 1105: baseline = height-1; /* and baseline */ 1106: /* ------------------------------------------------------------------------- 1107: allocate and initialize subraster struct 1108: -------------------------------------------------------------------------- */ 1109: if ( msgfp!=NULL && msglevel>=9999 ) 1110: { fprintf(msgfp,"new_subraster(%d,%d,%d)> entry point\n", 1111: width,height,pixsz); fflush(msgfp); } 1112: /* --- allocate subraster struct --- */ 1113: sp = (subraster *)malloc(sizeof(subraster)); /* malloc subraster struct */ 1114: if ( sp == (subraster *)NULL ) /* malloc failed */ 1115: goto end_of_job; /* return error to caller */ 1116: /* --- initialize subraster struct --- */ 1117: sp->type = NOVALUE; /* character or image raster */ 1118: sp->symdef = (mathchardef *)NULL; /* mathchardef identifying image */ 1119: sp->baseline = baseline; /*0 if image is entirely descending*/ 1120: sp->size = size; /* font size 0-4 */ 1121: sp->toprow = sp->leftcol = (-1); /* upper-left corner of subraster */ 1122: sp->image = (raster *)NULL; /*ptr to bitmap image of subraster*/ 1123: /* ------------------------------------------------------------------------- 1124: allocate raster and embed it in subraster, and return to caller 1125: -------------------------------------------------------------------------- */ 1126: /* --- allocate raster struct if desired --- */ 1127: if ( width>0 && height>0 && pixsz>0 ) /* caller wants raster */ 1128: { if ( (rp=new_raster(width,height,pixsz)) /* allocate embedded raster */ 1129: != NULL ) /* if allocate succeeded */ 1130: sp->image = rp; /* embed raster in subraster */ 1131: else /* or if allocate failed */ 1132: { delete_subraster(sp); /* free non-unneeded subraster */ 1133: sp = NULL; } } /* signal error */ 1134: /* --- back to caller with new subraster or NULL --- */ 1135: end_of_job: 1136: if ( msgfp!=NULL && msglevel>=9999 ) 1137: { fprintf(msgfp,"new_subraster(%d,%d,%d)> returning (%s)\n", 1138: width,height,pixsz,(sp==NULL?"null ptr":"success")); fflush(msgfp); } 1139: return ( sp ); 1140: } /* --- end-of-function new_subraster() --- */ 1141: 1142: 1143: /* ========================================================================== 1144: * Function: new_chardef ( ) 1145: * Purpose: Allocates and initializes a chardef struct, 1146: * but _not_ the embedded raster struct. 1147: * -------------------------------------------------------------------------- 1148: * Arguments: none 1149: * -------------------------------------------------------------------------- 1150: * Returns: ( chardef * ) ptr to allocated and initialized 1151: * chardef struct, or NULL for any error. 1152: * -------------------------------------------------------------------------- 1153: * Notes: 1154: * ======================================================================= */ 1155: /* --- entry point --- */ 1156: chardef *new_chardef ( ) 1157: { 1158: /* ------------------------------------------------------------------------- 1159: Allocations and Declarations 1160: -------------------------------------------------------------------------- */ 1161: chardef *cp = (chardef *)NULL; /* chardef ptr returned to caller */ 1162: /* ------------------------------------------------------------------------- 1163: allocate and initialize chardef struct 1164: -------------------------------------------------------------------------- */ 1165: cp = (chardef *)malloc(sizeof(chardef)); /* malloc chardef struct */ 1166: if ( cp == (chardef *)NULL ) /* malloc failed */ 1167: goto end_of_job; /* return error to caller */ 1168: cp->charnum = cp->location = 0; /* init character description */ 1169: cp->toprow = cp->topleftcol = 0; /* init upper-left corner */ 1170: cp->botrow = cp->botleftcol = 0; /* init lower-left corner */ 1171: cp->image.width = cp->image.height = 0; /* init raster dimensions */ 1172: cp->image.format = 0; /* init raster format */ 1173: cp->image.pixsz = 0; /* and #bits per pixel */ 1174: cp->image.pixmap = NULL; /* init raster pixmap as null */ 1175: /* ------------------------------------------------------------------------- 1176: Back to caller with address of chardef struct, or NULL ptr for any error. 1177: -------------------------------------------------------------------------- */ 1178: end_of_job: 1179: return ( cp ); 1180: } /* --- end-of-function new_chardef() --- */ 1181: 1182: 1183: /* ========================================================================== 1184: * Function: delete_raster ( rp ) 1185: * Purpose: Destructor for raster. 1186: * Frees memory for raster bitmap and struct. 1187: * -------------------------------------------------------------------------- 1188: * Arguments: rp (I) ptr to raster struct to be deleted. 1189: * -------------------------------------------------------------------------- 1190: * Returns: ( int ) 1 if completed successfully, 1191: * or 0 otherwise (for any error). 1192: * -------------------------------------------------------------------------- 1193: * Notes: 1194: * ======================================================================= */ 1195: /* --- entry point --- */ 1196: int delete_raster ( raster *rp ) 1197: { 1198: /* ------------------------------------------------------------------------- 1199: free raster bitmap and struct 1200: -------------------------------------------------------------------------- */ 1201: if ( rp != (raster *)NULL ) /* can't free null ptr */ 1202: { 1203: if ( rp->pixmap != (pixbyte *)NULL ) /* can't free null ptr */ 1204: free((void *)rp->pixmap); /* free pixmap within raster */ 1205: free((void *)rp); /* lastly, free raster struct */ 1206: } /* --- end-of-if(rp!=NULL) --- */ 1207: return ( 1 ); /* back to caller, 1=okay 0=failed */ 1208: } /* --- end-of-function delete_raster() --- */ 1209: 1210: 1211: /* ========================================================================== 1212: * Function: delete_subraster ( sp ) 1213: * Purpose: Deallocates a subraster (and embedded raster) 1214: * -------------------------------------------------------------------------- 1215: * Arguments: sp (I) ptr to subraster struct to be deleted. 1216: * -------------------------------------------------------------------------- 1217: * Returns: ( int ) 1 if completed successfully, 1218: * or 0 otherwise (for any error). 1219: * -------------------------------------------------------------------------- 1220: * Notes: 1221: * ======================================================================= */ 1222: /* --- entry point --- */ 1223: int delete_subraster ( subraster *sp ) 1224: { 1225: /* ------------------------------------------------------------------------- 1226: free subraster struct 1227: -------------------------------------------------------------------------- */ 1228: int delete_raster(); /* to delete embedded raster */ 1229: if ( sp != (subraster *)NULL ) /* can't free null ptr */ 1230: { 1231: if ( sp->type != CHARASTER ) /* not static character data */ 1232: if ( sp->image != NULL ) /*raster allocated within subraster*/ 1233: delete_raster(sp->image); /* so free embedded raster */ 1234: free((void *)sp); /* and free subraster struct itself*/ 1235: } /* --- end-of-if(sp!=NULL) --- */ 1236: return ( 1 ); /* back to caller, 1=okay 0=failed */ 1237: } /* --- end-of-function delete_subraster() --- */ 1238: 1239: 1240: /* ========================================================================== 1241: * Function: delete_chardef ( cp ) 1242: * Purpose: Deallocates a chardef (and bitmap of embedded raster) 1243: * -------------------------------------------------------------------------- 1244: * Arguments: cp (I) ptr to chardef struct to be deleted. 1245: * -------------------------------------------------------------------------- 1246: * Returns: ( int ) 1 if completed successfully, 1247: * or 0 otherwise (for any error). 1248: * -------------------------------------------------------------------------- 1249: * Notes: 1250: * ======================================================================= */ 1251: /* --- entry point --- */ 1252: int delete_chardef ( chardef *cp ) 1253: { 1254: /* ------------------------------------------------------------------------- 1255: free chardef struct 1256: -------------------------------------------------------------------------- */ 1257: if ( cp != (chardef *)NULL ) /* can't free null ptr */ 1258: { 1259: if ( cp->image.pixmap != NULL ) /* pixmap allocated within raster */ 1260: free((void *)cp->image.pixmap); /* so free embedded pixmap */ 1261: free((void *)cp); /* and free chardef struct itself */ 1262: } /* --- end-of-if(cp!=NULL) --- */ 1263: /* ------------------------------------------------------------------------- 1264: Back to caller with 1=okay, 0=failed. 1265: -------------------------------------------------------------------------- */ 1266: return ( 1 ); 1267: } /* --- end-of-function delete_chardef() --- */ 1268: 1269: 1270: /* ========================================================================== 1271: * Function: rastcpy ( rp ) 1272: * Purpose: makes duplicate copy of rp 1273: * -------------------------------------------------------------------------- 1274: * Arguments: rp (I) ptr to raster struct to be copied 1275: * -------------------------------------------------------------------------- 1276: * Returns: ( raster * ) ptr to new copy rp, 1277: * or NULL for any error. 1278: * -------------------------------------------------------------------------- 1279: * Notes: o 1280: * ======================================================================= */ 1281: /* --- entry point --- */ 1282: raster *rastcpy ( raster *rp ) 1283: { 1284: /* ------------------------------------------------------------------------- 1285: Allocations and Declarations 1286: -------------------------------------------------------------------------- */ 1287: raster *new_raster(), *newrp=NULL; /*copied raster returned to caller*/ 1288: int height= (rp==NULL?0:rp->height), /* original and copied height */ 1289: width = (rp==NULL?0:rp->width), /* original and copied width */ 1290: pixsz = (rp==NULL?0:rp->pixsz), /* #bits per pixel */ 1291: nbytes= (rp==NULL?0:(pixmapsz(rp))); /* #bytes in rp's pixmap */ 1292: /* ------------------------------------------------------------------------- 1293: allocate rotated raster and fill it 1294: -------------------------------------------------------------------------- */ 1295: /* --- allocate copied raster with same width,height, and copy bitmap --- */ 1296: if ( rp != NULL ) /* nothing to copy if ptr null */ 1297: if ( (newrp = new_raster(width,height,pixsz)) /*same width,height in copy*/ 1298: != NULL ) /* check that allocate succeeded */ 1299: memcpy(newrp->pixmap,rp->pixmap,nbytes); /* fill copied raster pixmap */ 1300: return ( newrp ); /* return copied raster to caller */ 1301: } /* --- end-of-function rastcpy() --- */ 1302: 1303: 1304: /* ========================================================================== 1305: * Function: subrastcpy ( sp ) 1306: * Purpose: makes duplicate copy of sp 1307: * -------------------------------------------------------------------------- 1308: * Arguments: sp (I) ptr to subraster struct to be copied 1309: * -------------------------------------------------------------------------- 1310: * Returns: ( subraster * ) ptr to new copy sp, 1311: * or NULL for any error. 1312: * -------------------------------------------------------------------------- 1313: * Notes: o 1314: * ======================================================================= */ 1315: /* --- entry point --- */ 1316: subraster *subrastcpy ( subraster *sp ) 1317: { 1318: /* ------------------------------------------------------------------------- 1319: Allocations and Declarations 1320: -------------------------------------------------------------------------- */ 1321: subraster *new_subraster(), *newsp=NULL; /* allocate new subraster */ 1322: raster *rastcpy(), *newrp=NULL; /* and new raster image within it */ 1323: int delete_subraster(); /* dealloc newsp if rastcpy() fails*/ 1324: /* ------------------------------------------------------------------------- 1325: make copy, and return it to caller 1326: -------------------------------------------------------------------------- */ 1327: if ( sp == NULL ) goto end_of_job; /* nothing to copy */ 1328: /* --- allocate new subraster "envelope" for copy --- */ 1329: if ( (newsp=new_subraster(0,0,0)) /* allocate subraster "envelope" */ 1330: == NULL ) goto end_of_job; /* and quit if we fail to allocate */ 1331: /* --- transparently copy original envelope to new one --- */ 1332: memcpy((void *)newsp,(void *)sp,sizeof(subraster)); /* copy envelope */ 1333: /* --- make a copy of the rasterized image itself, if there is one --- */ 1334: if ( sp->image != NULL ) /* there's an image embedded in sp */ 1335: if ( (newrp = rastcpy(sp->image)) /* so copy rasterized image in sp */ 1336: == NULL ) /* failed to copy successfully */ 1337: { delete_subraster(newsp); /* won't need newsp any more */ 1338: newsp = NULL; /* because we're returning error */ 1339: goto end_of_job; } /* back to caller with error signal*/ 1340: /* --- set new params in new envelope --- */ 1341: newsp->image = newrp; /* new raster image we just copied */ 1342: switch ( sp->type ) /* set new raster image type */ 1343: { case STRINGRASTER: case CHARASTER: newsp->type = STRINGRASTER; break; 1344: case ASCIISTRING: newsp->type = ASCIISTRING; break; 1345: case FRACRASTER: newsp->type = FRACRASTER; break; 1346: case BLANKSIGNAL: newsp->type = blanksignal; break; 1347: case IMAGERASTER: default: newsp->type = IMAGERASTER; break; } 1348: /* --- return copy of sp to caller --- */ 1349: end_of_job: 1350: return ( newsp ); /* copy back to caller */ 1351: } /* --- end-of-function subrastcpy() --- */ 1352: 1353: 1354: /* ========================================================================== 1355: * Function: rastrot ( rp ) 1356: * Purpose: rotates rp image 90 degrees right/clockwise 1357: * -------------------------------------------------------------------------- 1358: * Arguments: rp (I) ptr to raster struct to be rotated 1359: * -------------------------------------------------------------------------- 1360: * Returns: ( raster * ) ptr to new raster rotated relative to rp, 1361: * or NULL for any error. 1362: * -------------------------------------------------------------------------- 1363: * Notes: o An underbrace is } rotated 90 degrees clockwise, 1364: * a hat is <, etc. 1365: * ======================================================================= */ 1366: /* --- entry point --- */ 1367: raster *rastrot ( raster *rp ) 1368: { 1369: /* ------------------------------------------------------------------------- 1370: Allocations and Declarations 1371: -------------------------------------------------------------------------- */ 1372: raster *new_raster(), *rotated=NULL; /*rotated raster returned to caller*/ 1373: int height = rp->height, irow, /* original height, row index */ 1374: width = rp->width, icol, /* original width, column index */ 1375: pixsz = rp->pixsz; /* #bits per pixel */ 1376: /* ------------------------------------------------------------------------- 1377: allocate rotated raster and fill it 1378: -------------------------------------------------------------------------- */ 1379: /* --- allocate rotated raster with flipped width<-->height --- */ 1380: if ( (rotated = new_raster(height,width,pixsz)) /* flip width,height */ 1381: != NULL ) /* check that allocation succeeded */ 1382: /* --- fill rotated raster --- */ 1383: for ( irow=0; irow<height; irow++ ) /* for each row of rp */ 1384: for ( icol=0; icol<width; icol++ ) /* and each column of rp */ 1385: { int value = getpixel(rp,irow,icol); 1386: /* setpixel(rotated,icol,irow,value); } */ 1387: setpixel(rotated,icol,(height-1-irow),value); } 1388: return ( rotated ); /* return rotated raster to caller */ 1389: } /* --- end-of-function rastrot() --- */ 1390: 1391: 1392: /* ========================================================================== 1393: * Function: rastmag ( rp, magstep ) 1394: * Purpose: magnifies rp by integer magstep, 1395: * e.g., double-height and double-width if magstep=2 1396: * -------------------------------------------------------------------------- 1397: * Arguments: rp (I) ptr to raster struct to be "magnified" 1398: * magstep (I) int containing magnification scale, 1399: * e.g., 2 to double the width and height of rp 1400: * -------------------------------------------------------------------------- 1401: * Returns: ( raster * ) ptr to new raster magnified relative to rp, 1402: * or NULL for any error. 1403: * -------------------------------------------------------------------------- 1404: * Notes: o 1405: * ======================================================================= */ 1406: /* --- entry point --- */ 1407: raster *rastmag ( raster *rp, int magstep ) 1408: { 1409: /* ------------------------------------------------------------------------- 1410: Allocations and Declarations 1411: -------------------------------------------------------------------------- */ 1412: raster *new_raster(), *magnified=NULL; /* magnified raster back to caller */ 1413: int height = rp->height, irow, /* height, row index */ 1414: width = rp->width, icol, /* width, column index */ 1415: mrow = 0, mcol = 0, /* dup pixels magstep*magstep times*/ 1416: pixsz = rp->pixsz; /* #bits per pixel */ 1417: /* ------------------------------------------------------------------------- 1418: check args 1419: -------------------------------------------------------------------------- */ 1420: if ( rp == NULL ) goto end_of_job; /* no input raster supplied */ 1421: if ( magstep<1 || magstep>10 ) goto end_of_job; /* sanity check */ 1422: /* ------------------------------------------------------------------------- 1423: allocate magnified raster and fill it 1424: -------------------------------------------------------------------------- */ 1425: /* --- allocate magnified raster with magstep*width, magstep*height --- */ 1426: if ( (magnified = new_raster(magstep*width,magstep*height,pixsz))/*allocate*/ 1427: != NULL ) /* check that allocation succeeded */ 1428: /* --- fill reflected raster --- */ 1429: for ( irow=0; irow<height; irow++ ) /* for each row of rp */ 1430: for ( mrow=0; mrow<magstep; mrow++ ) /* dup row magstep times */ 1431: for ( icol=0; icol<width; icol++ ) /* and for each column of rp */ 1432: for ( mcol=0; mcol<magstep; mcol++ ) { /* dup col magstep times */ 1433: int value = getpixel(rp,irow,icol); 1434: int row1 = irow*magstep, col1 = icol*magstep; 1435: setpixel(magnified,(row1+mrow),(col1+mcol),value); } 1436: end_of_job: 1437: return ( magnified ); /*return magnified raster to caller*/ 1438: } /* --- end-of-function rastmag() --- */ 1439: 1440: 1441: /* ========================================================================== 1442: * Function: bytemapmag ( bytemap, width, height, magstep ) 1443: * Purpose: magnifies a bytemap by integer magstep, 1444: * e.g., double-height and double-width if magstep=2 1445: * -------------------------------------------------------------------------- 1446: * Arguments: bytemap (I) intbyte * ptr to byte map to be "magnified" 1447: * width (I) int containing #cols in original bytemap 1448: * height (I) int containing #rows in original bytemap 1449: * magstep (I) int containing magnification scale, 1450: * e.g., 2 to double the width and height of rp 1451: * -------------------------------------------------------------------------- 1452: * Returns: ( intbyte * ) ptr to new bytemap magnified relative to 1453: * original bytemap, or NULL for any error. 1454: * -------------------------------------------------------------------------- 1455: * Notes: o Apply EPX/Scale2x/AdvMAME2x for magstep 2, 1456: * and Scale3x/AdvMAME3x for magstep 3, 1457: * as described by http://en.wikipedia.org/wiki/2xSaI 1458: * ======================================================================= */ 1459: /* --- entry point --- */ 1460: intbyte *bytemapmag ( intbyte *bytemap, int width, int height, int magstep ) 1461: { 1462: /* ------------------------------------------------------------------------- 1463: Allocations and Declarations 1464: -------------------------------------------------------------------------- */ 1465: intbyte *magnified=NULL; /* magnified bytemap back to caller*/ 1466: int irow, icol, /* original height, width indexes */ 1467: mrow=0, mcol=0; /* dup bytes magstep*magstep times */ 1468: int imap = (-1), /* original bytemap[] index */ 1469: byteval = 0; /* byteval=bytemap[imap] */ 1470: int isAdvMAME = 1; /* true to apply AdvMAME2x and 3x */ 1471: int icell[10], /* bytemap[] nearest neighbors */ 1472: bmmdiff = 64; /* nearest neighbor diff allowed */ 1473: #define bmmeq(i,j) ((absval((icell[i]-icell[j]))<=bmmdiff)) /*approx equal*/ 1474: /* ------------------------------------------------------------------------- 1475: check args 1476: -------------------------------------------------------------------------- */ 1477: if ( bytemap == NULL ) goto end_of_job; /* no input bytemap supplied */ 1478: if ( width<1 || height<1 ) goto end_of_job; /* invalid bytemap dimensions */ 1479: if ( width*height>100000 ) goto end_of_job; /* sanity check */ 1480: if ( magstep<1 || magstep>10 ) goto end_of_job; /* sanity check */ 1481: /* ------------------------------------------------------------------------- 1482: allocate magnified bytemap and fill it 1483: -------------------------------------------------------------------------- */ 1484: /* --- allocate bytemap for magstep*width, magstep*height --- */ 1485: if ( (magnified = (intbyte *)(malloc(magstep*width*magstep*height)))/*alloc*/ 1486: != NULL ) /* check that allocation succeeded */ 1487: /* --- fill reflected raster --- */ 1488: for ( irow=0; irow<height; irow++ ) /* for each row of bytemap */ 1489: for ( icol=0; icol<width; icol++ ) { /* and for each column of bytemap */ 1490: int imag1 = (icol + irow*(width*magstep))*magstep; /*upper-left corner*/ 1491: imap++; /* bump bytemap[] index */ 1492: byteval = (int)(bytemap[imap]); /* grayscale value at this pixel */ 1493: for ( mrow=0; mrow<magstep; mrow++ ) /* dup row magstep times */ 1494: for ( mcol=0; mcol<magstep; mcol++ ) { /* dup col magstep times */ 1495: int idup = mcol + mrow*(width*magstep); /* offset from imag1 */ 1496: int imag = imag1+idup; /* adjust magnified[imag] */ 1497: magnified[imag] = (intbyte)(byteval); 1498: /* --- apply AdvMAME2x and 3x (if desired) --- */ 1499: if ( isAdvMAME ) { /* AdvMAME2x and 3x wanted */ 1500: int mcell = 1 + mcol + magstep*mrow; /*1,2,3,4 or 1,2,3,4,5,6,7,8,9*/ 1501: icell[5]= byteval, /* center cell of 3x3 bytemap[] */ 1502: icell[4]= (icol>0?(int)(bytemap[imap-1]):byteval), /*left of center*/ 1503: icell[6]= (icol<width?(int)(bytemap[imap+1]):byteval), /*right*/ 1504: icell[2]= (irow>0?(int)(bytemap[imap-width]):byteval),/*above center*/ 1505: icell[8]= (irow<height?(int)(bytemap[imap+width]):byteval), /*below*/ 1506: icell[1]= (irow>0&&icol>0?(int)(bytemap[imap-width-1]):byteval), 1507: icell[3]= (irow>0&&icol<width?(int)(bytemap[imap-width+1]):byteval), 1508: icell[7]= (irow<height&&icol>0?(int)(bytemap[imap+width-1]):byteval), 1509: icell[9]=(irow<height&&icol<width?(int)(bytemap[imap+width+1]):byteval); 1510: switch ( magstep ) { /* 2x magstep=2, 3x magstep=3 */ 1511: default: break; /* no AdvMAME at other magsteps */ 1512: case 2: /* AdvMAME2x */ 1513: if ( mcell == 1 ) 1514: if ( bmmeq(4,2) && !bmmeq(4,8) && !bmmeq(2,6) ) 1515: magnified[imag] = icell[2]; 1516: if ( mcell == 2 ) 1517: if ( bmmeq(2,6) && !bmmeq(2,4) && !bmmeq(6,8) ) 1518: magnified[imag] = icell[6]; 1519: if ( mcell == 4 ) 1520: if ( bmmeq(6,8) && !bmmeq(6,2) && !bmmeq(8,4) ) 1521: magnified[imag] = icell[8]; 1522: if ( mcell == 3 ) 1523: if ( bmmeq(8,4) && !bmmeq(8,6) && !bmmeq(4,2) ) 1524: magnified[imag] = icell[4]; 1525: break; 1526: case 3: /* AdvMAME3x */ 1527: if ( mcell == 1 ) 1528: if ( bmmeq(4,2) && !bmmeq(4,8) && !bmmeq(2,6) ) 1529: magnified[imag] = icell[4]; 1530: if ( mcell == 2 ) 1531: if ( (bmmeq(4,2) && !bmmeq(4,8) && !bmmeq(2,6) && !bmmeq(5,3)) 1532: || (bmmeq(2,6) && !bmmeq(2,4) && !bmmeq(6,8) && !bmmeq(5,1)) ) 1533: magnified[imag] = icell[2]; 1534: if ( mcell == 3 ) 1535: if ( bmmeq(2,6) && !bmmeq(2,4) && !bmmeq(6,8) ) 1536: magnified[imag] = icell[6]; 1537: if ( mcell == 4 ) 1538: if ( (bmmeq(8,4) && !bmmeq(8,6) && !bmmeq(4,2) && !bmmeq(5,1)) 1539: || (bmmeq(4,2) && !bmmeq(4,8) && !bmmeq(2,6) && !bmmeq(5,7)) ) 1540: magnified[imag] = icell[4]; 1541: if ( mcell == 6 ) 1542: if ( (bmmeq(2,6) && !bmmeq(2,4) && !bmmeq(6,8) && !bmmeq(5,9)) 1543: || (bmmeq(6,8) && !bmmeq(6,2) && !bmmeq(8,4) && !bmmeq(5,3)) ) 1544: magnified[imag] = icell[6]; 1545: if ( mcell == 7 ) 1546: if ( bmmeq(8,4) && !bmmeq(8,6) && !bmmeq(4,2) ) 1547: magnified[imag] = icell[4]; 1548: if ( mcell == 8 ) 1549: if ( (bmmeq(6,8) && !bmmeq(6,2) && !bmmeq(8,4) && !bmmeq(5,7)) 1550: || (bmmeq(8,4) && !bmmeq(8,6) && !bmmeq(4,2) && !bmmeq(5,9)) ) 1551: magnified[imag] = icell[8]; 1552: if ( mcell == 9 ) 1553: if ( bmmeq(6,8) && !bmmeq(6,2) && !bmmeq(8,4) ) 1554: magnified[imag] = icell[6]; 1555: break; 1556: } } /* --- end-of-switch(magstep) --- */ 1557: } /* --- end-of-for(mrow,mcol) --- */ 1558: } /* --- end-of-for(irow,icol) --- */ 1559: end_of_job: 1560: return ( magnified ); /*return magnified raster to caller*/ 1561: } /* --- end-of-function bytemapmag() --- */ 1562: 1563: 1564: /* ========================================================================== 1565: * Function: rastref ( rp, axis ) 1566: * Purpose: reflects rp, horizontally about y-axis |_ becomes _| if axis=1 1567: * or vertically about x-axis M becomes W if axis=2. 1568: * -------------------------------------------------------------------------- 1569: * Arguments: rp (I) ptr to raster struct to be reflected 1570: * axis (I) int containing 1 for horizontal reflection, 1571: * or 2 for vertical 1572: * -------------------------------------------------------------------------- 1573: * Returns: ( raster * ) ptr to new raster reflected relative to rp, 1574: * or NULL for any error. 1575: * -------------------------------------------------------------------------- 1576: * Notes: o 1577: * ======================================================================= */ 1578: /* --- entry point --- */ 1579: raster *rastref ( raster *rp, int axis ) 1580: { 1581: /* ------------------------------------------------------------------------- 1582: Allocations and Declarations 1583: -------------------------------------------------------------------------- */ 1584: raster *new_raster(), *reflected=NULL; /* reflected raster back to caller */ 1585: int height = rp->height, irow, /* height, row index */ 1586: width = rp->width, icol, /* width, column index */ 1587: pixsz = rp->pixsz; /* #bits per pixel */ 1588: /* ------------------------------------------------------------------------- 1589: allocate reflected raster and fill it 1590: -------------------------------------------------------------------------- */ 1591: /* --- allocate reflected raster with same width, height --- */ 1592: if ( axis==1 || axis==2 ) /* first validate axis arg */ 1593: if ( (reflected = new_raster(width,height,pixsz)) /* same width, height */ 1594: != NULL ) /* check that allocation succeeded */ 1595: /* --- fill reflected raster --- */ 1596: for ( irow=0; irow<height; irow++ ) /* for each row of rp */ 1597: for ( icol=0; icol<width; icol++ ) { /* and each column of rp */ 1598: int value = getpixel(rp,irow,icol); 1599: if ( axis == 1 ) { setpixel(reflected,irow,width-1-icol,value); } 1600: if ( axis == 2 ) { setpixel(reflected,height-1-irow,icol,value); } } 1601: return ( reflected ); /*return reflected raster to caller*/ 1602: } /* --- end-of-function rastref() --- */ 1603: 1604: 1605: /* ========================================================================== 1606: * Function: rastput ( target, source, top, left, isopaque ) 1607: * Purpose: Overlays source onto target, 1608: * with the 0,0-bit of source onto the top,left-bit of target. 1609: * -------------------------------------------------------------------------- 1610: * Arguments: target (I) ptr to target raster struct 1611: * source (I) ptr to source raster struct 1612: * top (I) int containing 0 ... target->height - 1 1613: * left (I) int containing 0 ... target->width - 1 1614: * isopaque (I) int containing false (zero) to allow 1615: * original 1-bits of target to "show through" 1616: * 0-bits of source. 1617: * -------------------------------------------------------------------------- 1618: * Returns: ( int ) 1 if completed successfully, 1619: * or 0 otherwise (for any error). 1620: * -------------------------------------------------------------------------- 1621: * Notes: 1622: * ======================================================================= */ 1623: /* --- entry point --- */ 1624: int rastput ( raster *target, raster *source, 1625: int top, int left, int isopaque ) 1626: { 1627: /* ------------------------------------------------------------------------- 1628: Allocations and Declarations 1629: -------------------------------------------------------------------------- */ 1630: int irow, icol, /* indexes over source raster */ 1631: twidth=target->width, theight=target->height, /*target width,height*/ 1632: tpix, ntpix = twidth*theight; /* #pixels in target */ 1633: int isfatal = 0, /* true to abend on out-of-bounds error */ 1634: isstrict = 0/*1*/, /* true for strict bounds check - no "wrap"*/ 1635: isokay = 1; /* true if no pixels out-of-bounds */ 1636: /* ------------------------------------------------------------------------- 1637: superimpose source onto target, one bit at a time 1638: -------------------------------------------------------------------------- */ 1639: if ( isstrict && (top<0 || left<0) ) /* args fail strict test */ 1640: isokay = 0; /* so just return error */ 1641: else 1642: for ( irow=0; irow<source->height; irow++ ) /* for each scan line */ 1643: { 1644: tpix = (top+irow)*target->width + left - 1; /*first target pixel (-1)*/ 1645: for ( icol=0; icol<source->width; icol++ ) /* each pixel in scan line */ 1646: { 1647: int svalue = getpixel(source,irow,icol); /* source pixel value */ 1648: ++tpix; /* bump target pixel */ 1649: if ( msgfp!=NULL && msglevel>=9999 ) /* debugging output */ 1650: { fprintf(msgfp,"rastput> tpix,ntpix=%d,%d top,irow,theight=%d,%d,%d " 1651: "left,icol,twidth=%d,%d,%d\n", tpix,ntpix, top,irow,theight, 1652: left,icol,twidth); fflush(msgfp); } 1653: if ( tpix >= ntpix /* bounds check failed */ 1654: || (isstrict && (irow+top>=theight || icol+left>=twidth)) ) 1655: { isokay = 0; /* reset okay flag */ 1656: if ( isfatal ) goto end_of_job; /* abort if error is fatal */ 1657: else break; } /*or just go on to next row*/ 1658: if ( tpix >= 0 ) /* bounds check okay */ 1659: if ( svalue!=0 || isopaque ) { /*got dark or opaque source*/ 1660: setpixel(target,irow+top,icol+left,svalue); }/*overlay source on targ*/ 1661: } /* --- end-of-for(icol) --- */ 1662: } /* --- end-of-for(irow) --- */ 1663: /* ------------------------------------------------------------------------- 1664: Back to caller with 1=okay, 0=failed. 1665: -------------------------------------------------------------------------- */ 1666: end_of_job: 1667: return ( isokay /*isfatal? (tpix<ntpix? 1:0) : 1*/ ); 1668: } /* --- end-of-function rastput() --- */ 1669: 1670: 1671: /* ========================================================================== 1672: * Function: rastcompose ( sp1, sp2, offset2, isalign, isfree ) 1673: * Purpose: Overlays sp2 on top of sp1, leaving both unchanged 1674: * and returning a newly-allocated composite subraster. 1675: * Frees/deletes input sp1 and/or sp2 depending on value 1676: * of isfree (0=none, 1=sp1, 2=sp2, 3=both). 1677: * -------------------------------------------------------------------------- 1678: * Arguments: sp1 (I) subraster * to "underneath" subraster, 1679: * whose baseline is preserved 1680: * sp2 (I) subraster * to "overlaid" subraster 1681: * offset2 (I) int containing 0 or number of pixels 1682: * to horizontally shift sp2 relative to sp1, 1683: * either positive (right) or negative 1684: * isalign (I) int containing 1 to align baselines, 1685: * or 0 to vertically center sp2 over sp1. 1686: * For isalign=2, images are vertically 1687: * centered, but then adjusted by \raisebox 1688: * lifts, using global variables rastlift1 1689: * for sp1 and rastlift for sp2. 1690: * isfree (I) int containing 1=free sp1 before return, 1691: * 2=free sp2, 3=free both, 0=free none. 1692: * -------------------------------------------------------------------------- 1693: * Returns: ( subraster * ) pointer to constructed subraster 1694: * or NULL for any error 1695: * -------------------------------------------------------------------------- 1696: * Notes: o The top-left corner of each raster box has coords (0,0), 1697: * down to (h-1,w-1) for a box of height h and width w. 1698: * o A raster's baseline, b, is typically 0 <= b < h. 1699: * But b can actually go out-of-bounds, b>=h or b<0, for 1700: * an image additionally lifted (b>=h) or lowered (b<0) 1701: * with respect to the surrounding expression. 1702: * o Note that b=h-1 means no descenders and the bottom 1703: * of the symbol rests exactly on the baseline, 1704: * whereas b=0 means the top pixel of the symbol rests 1705: * on the baseline, and all other pixels are descenders. 1706: * o The composite raster is constructed as follows... 1707: * The base image is labelled height h1 and baseline b1, 1708: * the overlay h2 and b2, and the composite H and B. 1709: * base overlay 1710: * --- +------------------------+ --- For the overlay to be 1711: * ^ | ^ +----------+| ^ vertically centered with 1712: * | | | | || | respect to the base, 1713: * | | |B-b1 | || | B - b1 = H-B -(h1-b1), so 1714: * | | v | || | 2*B = H-h1 + 2*b1 1715: * | |+----------+| || | B = b1 + (H-h1)/2 1716: * B || ^ ^ || || | And when the base image is 1717: * | || | | || || | bigger, H=h1 and B=b1 is 1718: * | || b1 | || || | the obvious correct answer. 1719: * | || | h1 || || H=h2 1720: * v || v | || || | 1721: * ----------||-------|--|| ||--|-------- 1722: * baseline || h1-b1 v || overlay || | 1723: * for base |+----------+| baseline || | 1724: * and com- | ^ | ignored || | 1725: * posite | |H-B- |----------|| | 1726: * | | (h1-b1)| || | 1727: * | v +----------+| v 1728: * +------------------------+ --- 1729: * ======================================================================= */ 1730: /* --- entry point --- */ 1731: subraster *rastcompose ( subraster *sp1, subraster *sp2, int offset2, 1732: int isalign, int isfree ) 1733: { 1734: /* ------------------------------------------------------------------------- 1735: Allocations and Declarations 1736: -------------------------------------------------------------------------- */ 1737: subraster *new_subraster(), *sp=(subraster *)NULL; /* returned subraster */ 1738: raster *rp=(raster *)NULL; /* new composite raster in sp */ 1739: int delete_subraster(); /* in case isfree non-zero */ 1740: int rastput(); /*place sp1,sp2 in composite raster*/ 1741: int base1 = sp1->baseline, /*baseline for underlying subraster*/ 1742: height1 = (sp1->image)->height, /* height for underlying subraster */ 1743: width1 = (sp1->image)->width, /* width for underlying subraster */ 1744: pixsz1 = (sp1->image)->pixsz, /* pixsz for underlying subraster */ 1745: base2 = sp2->baseline, /*baseline for overlaid subraster */ 1746: height2 = (sp2->image)->height, /* height for overlaid subraster */ 1747: width2 = (sp2->image)->width, /* width for overlaid subraster */ 1748: pixsz2 = (sp2->image)->pixsz; /* pixsz for overlaid subraster */ 1749: int height = max2(height1,height2), /*composite height if sp2 centered*/ 1750: base = base1 + (height-height1)/2, /* and composite baseline */ 1751: tlc2 = (height-height2)/2, /* top-left corner for overlay */ 1752: width=0, pixsz=0; /* other params for composite */ 1753: int lift1 = rastlift1, /* vertical \raisebox lift for sp1 */ 1754: lift2 = rastlift; /* vertical \raisebox lift for sp2 */ 1755: /* ------------------------------------------------------------------------- 1756: Initialization 1757: -------------------------------------------------------------------------- */ 1758: /* --- determine height, width and baseline of composite raster --- */ 1759: switch ( isalign ) { 1760: default: 1761: case 0: /* centered, baselines not aligned */ 1762: height = max2(height1,height2); /* max height */ 1763: base = base1 + (height-height1)/2; /* baseline for sp1 */ 1764: break; 1765: case 1: /* baselines of sp1,sp2 aligned */ 1766: height = max2(base1+1,base2+1) /* max height above baseline */ 1767: + max2(height1-base1-1,height2-base2-1); /*+max descending below*/ 1768: base = max2(base1,base2); /* max space above baseline */ 1769: break; 1770: case 2: /* centered +/- \raisebox lifts */ 1771: base1 -= lift1; base2 -= lift2; /* reset to unlifted images */ 1772: /* --- start with default for centered, unlifted images --- */ 1773: height2 += 2*absval(lift2); /* "virtual" height of overlay */ 1774: height = max2(height1,height2); /* max height */ 1775: base = base1 + (height-height1)/2; /* baseline for sp1 */ 1776: tlc2 = (height-height2)/2 /* top-left corner for overlay */ 1777: + (lift2>=0?0:2*absval(lift2)); /* "reflect" overlay below base */ 1778: break; 1779: } /* --- end-of-switch(isalign) --- */ 1780: width = max2(width1,width2+abs(offset2)); /* max width */ 1781: pixsz = max2(pixsz1,pixsz2); /* bitmap,bytemap becomes bytemap */ 1782: /* ------------------------------------------------------------------------- 1783: allocate concatted composite subraster 1784: -------------------------------------------------------------------------- */ 1785: /* --- allocate returned subraster (and then initialize it) --- */ 1786: if ( (sp=new_subraster(width,height,pixsz)) /* allocate new subraster */ 1787: == (subraster *)NULL ) goto end_of_job; /* failed, so quit */ 1788: /* --- initialize subraster parameters --- */ 1789: sp->type = IMAGERASTER; /* image */ 1790: sp->baseline = base; /* composite baseline */ 1791: sp->size = sp1->size; /* underlying char is sp1 */ 1792: if ( isalign == 2 ) sp->baseline += lift1; /* adjust baseline */ 1793: /* --- extract raster from subraster --- */ 1794: rp = sp->image; /* raster allocated in subraster */ 1795: /* ------------------------------------------------------------------------- 1796: overlay sp1 and sp2 in new composite raster 1797: -------------------------------------------------------------------------- */ 1798: switch ( isalign ) { 1799: default: 1800: case 0: /* centered, baselines not aligned */ 1801: rastput (rp, sp1->image, base-base1, (width-width1)/2, 1); /*underlying*/ 1802: rastput (rp, sp2->image, (height-height2)/2, /*overlaid*/ 1803: (width-width2)/2+offset2, 0); 1804: break; 1805: case 1: /* baselines of sp1,sp2 aligned */ 1806: rastput (rp, sp1->image, base-base1, (width-width1)/2, 1); /*underlying*/ 1807: rastput (rp, sp2->image, base-base2, /*overlaid*/ 1808: (width-width2)/2+offset2, 0); 1809: break; 1810: case 2: if(1){ /* centered +/- \raisebox lifts */ 1811: rastput (rp, sp1->image, base-base1, (width-width1)/2, 1); 1812: rastput (rp, sp2->image, tlc2, (width-width2)/2+offset2, 0); } 1813: break; 1814: } /* --- end-of-switch(isalign) --- */ 1815: /* ------------------------------------------------------------------------- 1816: free input if requested 1817: -------------------------------------------------------------------------- */ 1818: if ( isfree > 0 ) /* caller wants input freed */ 1819: { if ( isfree==1 || isfree>2 ) delete_subraster(sp1); /* free sp1 */ 1820: if ( isfree >= 2 ) delete_subraster(sp2); } /* and/or sp2 */ 1821: /* ------------------------------------------------------------------------- 1822: Back to caller with pointer to concatted subraster or with null for error 1823: -------------------------------------------------------------------------- */ 1824: end_of_job: 1825: return ( sp ); /* back with subraster or null ptr */ 1826: } /* --- end-of-function rastcompose() --- */ 1827: 1828: 1829: /* ========================================================================== 1830: * Function: rastcat ( sp1, sp2, isfree ) 1831: * Purpose: "Concatanates" subrasters sp1||sp2, leaving both unchanged 1832: * and returning a newly-allocated subraster. 1833: * Frees/deletes input sp1 and/or sp2 depending on value 1834: * of isfree (0=none, 1=sp1, 2=sp2, 3=both). 1835: * -------------------------------------------------------------------------- 1836: * Arguments: sp1 (I) subraster * to left-hand subraster 1837: * sp2 (I) subraster * to right-hand subraster 1838: * isfree (I) int containing 1=free sp1 before return, 1839: * 2=free sp2, 3=free both, 0=free none. 1840: * -------------------------------------------------------------------------- 1841: * Returns: ( subraster * ) pointer to constructed subraster sp1||sp2 1842: * or NULL for any error 1843: * -------------------------------------------------------------------------- 1844: * Notes: 1845: * ======================================================================= */ 1846: /* --- entry point --- */ 1847: subraster *rastcat ( subraster *sp1, subraster *sp2, int isfree ) 1848: { 1849: /* ------------------------------------------------------------------------- 1850: Allocations and Declarations 1851: -------------------------------------------------------------------------- */ 1852: subraster *new_subraster(), *sp=(subraster *)NULL; /* returned subraster */ 1853: raster *rp=(raster *)NULL; /* new concatted raster */ 1854: int delete_subraster(); /* in case isfree non-zero */ 1855: int rastput(); /*place sp1,sp2 in concatted raster*/ 1856: int type_raster(); /* debugging display */ 1857: int base1 = sp1->baseline, /*baseline for left-hand subraster*/ 1858: height1 = (sp1->image)->height, /* height for left-hand subraster */ 1859: width1 = (sp1->image)->width, /* width for left-hand subraster */ 1860: pixsz1 = (sp1->image)->pixsz, /* pixsz for left-hand subraster */ 1861: type1 = sp1->type, /* image type for left-hand */ 1862: base2 = sp2->baseline, /*baseline for right-hand subraster*/ 1863: height2 = (sp2->image)->height, /* height for right-hand subraster */ 1864: width2 = (sp2->image)->width, /* width for right-hand subraster */ 1865: pixsz2 = (sp2->image)->pixsz, /* pixsz for right-hand subraster */ 1866: type2 = sp2->type; /* image type for right-hand */ 1867: int height=0, width=0, pixsz=0, base=0; /*concatted sp1||sp2 composite*/ 1868: int issmash = (smashmargin!=0?1:0), /* true to "squash" sp1||sp2 */ 1869: isopaque = (issmash?0:1), /* not oppaque if smashing */ 1870: rastsmash(), isblank=0, nsmash=0, /* #cols to smash */ 1871: oldsmashmargin = smashmargin, /* save original smashmargin */ 1872: oldblanksymspace = blanksymspace, /* save original blanksymspace */ 1873: oldnocatspace = isnocatspace; /* save original isnocatspace */ 1874: mathchardef *symdef1 = sp1->symdef, /*mathchardef of last left-hand char*/ 1875: *symdef2 = sp2->symdef; /* mathchardef of right-hand char */ 1876: int class1 = (symdef1==NULL?ORDINARY:symdef1->class), /* symdef->class */ 1877: class2 = (symdef2==NULL?ORDINARY:symdef2->class), /* or default */ 1878: smash1 = (symdef1!=NULL)&&(class1==ORDINARY||class1==VARIABLE|| 1879: class1==OPENING||class1==CLOSING||class1==PUNCTION), 1880: smash2 = (symdef2!=NULL)&&(class2==ORDINARY||class2==VARIABLE|| 1881: class2==OPENING||class2==CLOSING||class2==PUNCTION), 1882: space = fontsize/2+1; /* #cols between sp1 and sp2 */ 1883: int isfrac = (type1 == FRACRASTER /* sp1 is a \frac */ 1884: && class2 == PUNCTION); /* and sp2 is punctuation */ 1885: /* ------------------------------------------------------------------------- 1886: Initialization 1887: -------------------------------------------------------------------------- */ 1888: /* --- determine inter-character space from character class --- */ 1889: if ( !isstring ) 1890: space = max2(2,(symspace[class1][class2] + fontsize-3)); /* space */ 1891: else space = 1; /* space for ascii string */ 1892: if ( isnocatspace > 0 ) { /* spacing explicitly turned off */ 1893: space = 0; /* reset space */ 1894: isnocatspace--; } /* and decrement isnocatspace flag */ 1895: if ( 0 && sp1->type == BLANKSIGNAL ) space=0; /*implicitly turn off spacing*/ 1896: if ( sp1->type==BLANKSIGNAL && sp2->type==BLANKSIGNAL ) /* both blank */ 1897: space = 0; /* no extra space between spaces */ 1898: if ( sp2->type != BLANKSIGNAL ) /* not a blank space signal */ 1899: if ( blanksymspace != 0 ) { /* and we have a space adjustment */ 1900: space = max2(0,space+blanksymspace); /* adjust as much as possible */ 1901: blanksymspace = 0; } /* and reset adjustment */ 1902: if ( msgfp!=NULL && msglevel>=999 ) /* display space results */ 1903: { fprintf(msgfp,"rastcat> space=%d, blanksymspace=%d, isnocatspace=%d\n", 1904: space,oldblanksymspace,oldnocatspace); fflush(msgfp); } 1905: /* --- determine smash --- */ 1906: if ( !isstring && !isfrac ) /* don't smash strings or \frac's */ 1907: if ( issmash ) { /* raster smash wanted */ 1908: int maxsmash = rastsmash(sp1,sp2), /* calculate max smash space */ 1909: margin = smashmargin; /* init margin without delta */ 1910: if ( (1 && smash1 && smash2) /* concatanating two chars */ 1911: || (1 && type1!=IMAGERASTER && type2!=IMAGERASTER 1912: && type1!=FRACRASTER && type2!=FRACRASTER ) ) 1913: /*maxsmash = 0;*/ /* turn off smash */ 1914: margin = max2(space-1,0); /* force small smashmargin */ 1915: else /* adjust for delta if images */ 1916: if ( issmashdelta ) /* smashmargin is a delta value */ 1917: margin += fontsize; /* add displaystyle base to margin */ 1918: if ( maxsmash == blanksignal ) /* sp2 is intentional blank */ 1919: isblank = 1; /* set blank flag signal */ 1920: else /* see how much extra space we have*/ 1921: if ( maxsmash > margin ) /* enough space for adjustment */ 1922: nsmash = maxsmash-margin; /* make adjustment */ 1923: if ( msgfp!=NULL && msglevel>=99 ) /* display smash results */ 1924: { fprintf(msgfp,"rastcat> maxsmash=%d, margin=%d, nsmash=%d\n", 1925: maxsmash,margin,nsmash); 1926: fprintf(msgfp,"rastcat> type1=%d,2=%d, class1=%d,2=%d\n", type1,type2, 1927: (symdef1==NULL?-999:class1),(symdef2==NULL?-999:class2)); 1928: fflush(msgfp); } 1929: } /* --- end-of-if(issmash) --- */ 1930: /* --- determine height, width and baseline of composite raster --- */ 1931: if ( !isstring ) 1932: { height = max2(base1+1,base2+1) /* max height above baseline */ 1933: + max2(height1-base1-1,height2-base2-1); /*+ max descending below*/ 1934: width = width1+width2 + space-nsmash; /*add widths and space-smash*/ 1935: width = max3(width,width1,width2); } /* don't "over-smash" composite */ 1936: else /* ascii string */ 1937: { height = 1; /* default */ 1938: width = width1 + width2 + space - 1; } /* no need for two nulls */ 1939: pixsz = max2(pixsz1,pixsz2); /* bitmap||bytemap becomes bytemap */ 1940: base = max2(base1,base2); /* max space above baseline */ 1941: if ( msgfp!=NULL && msglevel>=9999 ) /* display components */ 1942: { fprintf(msgfp,"rastcat> Left-hand ht,width,pixsz,base = %d,%d,%d,%d\n", 1943: height1,width1,pixsz1,base1); 1944: type_raster(sp1->image,msgfp); /* display left-hand raster */ 1945: fprintf(msgfp,"rastcat> Right-hand ht,width,pixsz,base = %d,%d,%d,%d\n", 1946: height2,width2,pixsz2,base2); 1947: type_raster(sp2->image,msgfp); /* display right-hand raster */ 1948: fprintf(msgfp, 1949: "rastcat> Composite ht,width,smash,pixsz,base = %d,%d,%d,%d,%d\n", 1950: height,width,nsmash,pixsz,base); 1951: fflush(msgfp); } /* flush msgfp buffer */ 1952: /* ------------------------------------------------------------------------- 1953: allocate concatted composite subraster 1954: -------------------------------------------------------------------------- */ 1955: /* --- allocate returned subraster (and then initialize it) --- */ 1956: if ( msgfp!=NULL && msglevel>=9999 ) 1957: { fprintf(msgfp,"rastcat> calling new_subraster(%d,%d,%d)\n", 1958: width,height,pixsz); fflush(msgfp); } 1959: if ( (sp=new_subraster(width,height,pixsz)) /* allocate new subraster */ 1960: == (subraster *)NULL ) /* failed */ 1961: { if ( msgfp!=NULL && msglevel>=1 ) /* report failure */ 1962: { fprintf(msgfp,"rastcat> new_subraster(%d,%d,%d) failed\n", 1963: width,height,pixsz); fflush(msgfp); } 1964: goto end_of_job; } /* failed, so quit */ 1965: /* --- initialize subraster parameters --- */ 1966: /* sp->type = (!isstring?STRINGRASTER:ASCIISTRING); */ /*concatted string*/ 1967: if ( !isstring ) 1968: sp->type = /*type2;*//*(type1==type2?type2:IMAGERASTER);*/ 1969: (type2!=CHARASTER? type2 : 1970: (type1!=CHARASTER&&type1!=BLANKSIGNAL 1971: &&type1!=FRACRASTER?type1:IMAGERASTER)); 1972: else 1973: sp->type = ASCIISTRING; /* concatted ascii string */ 1974: sp->symdef = symdef2; /* rightmost char is sp2 */ 1975: sp->baseline = base; /* composite baseline */ 1976: sp->size = sp2->size; /* rightmost char is sp2 */ 1977: if ( isblank ) /* need to propagate blanksignal */ 1978: sp->type = blanksignal; /* may not be completely safe??? */ 1979: /* --- extract raster from subraster --- */ 1980: rp = sp->image; /* raster allocated in subraster */ 1981: /* ------------------------------------------------------------------------- 1982: overlay sp1 and sp2 in new composite raster 1983: -------------------------------------------------------------------------- */ 1984: if ( msgfp!=NULL && msglevel>=9999 ) 1985: { fprintf(msgfp,"rastcat> calling rastput() to concatanate left||right\n"); 1986: fflush(msgfp); } /* flush msgfp buffer */ 1987: if ( !isstring ) 1988: rastput (rp, sp1->image, base-base1, /* overlay left-hand */ 1989: max2(0,nsmash-width1), 1); /* plus any residual smash space */ 1990: else 1991: memcpy(rp->pixmap,(sp1->image)->pixmap,width1-1); /*init left string*/ 1992: if ( msgfp!=NULL && msglevel>=9999 ) 1993: { type_raster(sp->image,msgfp); /* display composite raster */ 1994: fflush(msgfp); } /* flush msgfp buffer */ 1995: if ( !isstring ) 1996: { int fracbase = ( isfrac? /* baseline for punc after \frac */ 1997: max2(fraccenterline,base2):base ); /*adjust baseline or use original*/ 1998: rastput (rp, sp2->image, fracbase-base2, /* overlay right-hand */ 1999: max2(0,width1+space-nsmash), isopaque); /* minus any smashed space */ 2000: if ( 1 && type1 == FRACRASTER /* we're done with \frac image */ 2001: && type2 != FRACRASTER ) /* unless we have \frac\frac */ 2002: fraccenterline = NOVALUE; /* so reset centerline signal */ 2003: if ( fraccenterline != NOVALUE ) /* sp2 is a fraction */ 2004: fraccenterline += (base-base2); } /* so adjust its centerline */ 2005: else 2006: { strcpy((char *)(rp->pixmap)+width1-1+space,(char *)((sp2->image)->pixmap)); 2007: ((char *)(rp->pixmap))[width1+width2+space-2] = '\000'; } /*null-term*/ 2008: if ( msgfp!=NULL && msglevel>=9999 ) 2009: { type_raster(sp->image,msgfp); /* display composite raster */ 2010: fflush(msgfp); } /* flush msgfp buffer */ 2011: /* ------------------------------------------------------------------------- 2012: free input if requested 2013: -------------------------------------------------------------------------- */ 2014: if ( isfree > 0 ) /* caller wants input freed */ 2015: { if ( isfree==1 || isfree>2 ) delete_subraster(sp1); /* free sp1 */ 2016: if ( isfree >= 2 ) delete_subraster(sp2); } /* and/or sp2 */ 2017: /* ------------------------------------------------------------------------- 2018: Back to caller with pointer to concatted subraster or with null for error 2019: -------------------------------------------------------------------------- */ 2020: end_of_job: 2021: smashmargin = oldsmashmargin; /* reset original smashmargin */ 2022: return ( sp ); /* back with subraster or null ptr */ 2023: } /* --- end-of-function rastcat() --- */ 2024: 2025: 2026: /* ========================================================================== 2027: * Function: rastack ( sp1, sp2, base, space, iscenter, isfree ) 2028: * Purpose: Stack subrasters sp2 atop sp1, leaving both unchanged 2029: * and returning a newly-allocated subraster, 2030: * whose baseline is sp1's if base=1, or sp2's if base=2. 2031: * Frees/deletes input sp1 and/or sp2 depending on value 2032: * of isfree (0=none, 1=sp1, 2=sp2, 3=both). 2033: * -------------------------------------------------------------------------- 2034: * Arguments: sp1 (I) subraster * to lower subraster 2035: * sp2 (I) subraster * to upper subraster 2036: * base (I) int containing 1 if sp1 is baseline, 2037: * or 2 if sp2 is baseline. 2038: * space (I) int containing #rows blank space inserted 2039: * between sp1's image and sp2's image. 2040: * iscenter (I) int containing 1 to center both sp1 and sp2 2041: * in stacked array, 0 to left-justify both 2042: * isfree (I) int containing 1=free sp1 before return, 2043: * 2=free sp2, 3=free both, 0=free none. 2044: * -------------------------------------------------------------------------- 2045: * Returns: ( subraster * ) pointer to constructed subraster sp2 atop sp1 2046: * or NULL for any error 2047: * -------------------------------------------------------------------------- 2048: * Notes: 2049: * ======================================================================= */ 2050: /* --- entry point --- */ 2051: subraster *rastack ( subraster *sp1, subraster *sp2, 2052: int base, int space, int iscenter, int isfree ) 2053: { 2054: /* ------------------------------------------------------------------------- 2055: Allocations and Declarations 2056: -------------------------------------------------------------------------- */ 2057: subraster *new_subraster(), *sp=(subraster *)NULL; /* returned subraster */ 2058: raster *rp=(raster *)NULL; /* new stacked raster in sp */ 2059: int delete_subraster(); /* in case isfree non-zero */ 2060: int rastput(); /* place sp1,sp2 in stacked raster */ 2061: int base1 = sp1->baseline, /* baseline for lower subraster */ 2062: height1 = (sp1->image)->height, /* height for lower subraster */ 2063: width1 = (sp1->image)->width, /* width for lower subraster */ 2064: pixsz1 = (sp1->image)->pixsz, /* pixsz for lower subraster */ 2065: base2 = sp2->baseline, /* baseline for upper subraster */ 2066: height2 = (sp2->image)->height, /* height for upper subraster */ 2067: width2 = (sp2->image)->width, /* width for upper subraster */ 2068: pixsz2 = (sp2->image)->pixsz; /* pixsz for upper subraster */ 2069: int height=0, width=0, pixsz=0, baseline=0; /*for stacked sp2 atop sp1*/ 2070: mathchardef *symdef1 = sp1->symdef, /* mathchardef of right lower char */ 2071: *symdef2 = sp2->symdef; /* mathchardef of right upper char */ 2072: /* ------------------------------------------------------------------------- 2073: Initialization 2074: -------------------------------------------------------------------------- */ 2075: /* --- determine height, width and baseline of composite raster --- */ 2076: height = height1 + space + height2; /* sum of heights plus space */ 2077: width = max2(width1,width2); /* max width is overall width */ 2078: pixsz = max2(pixsz1,pixsz2); /* bitmap||bytemap becomes bytemap */ 2079: baseline = (base==1? height2+space+base1 : (base==2? base2 : 0)); 2080: /* ------------------------------------------------------------------------- 2081: allocate stacked composite subraster (with embedded raster) 2082: -------------------------------------------------------------------------- */ 2083: /* --- allocate returned subraster (and then initialize it) --- */ 2084: if ( (sp=new_subraster(width,height,pixsz)) /* allocate new subraster */ 2085: == (subraster *)NULL ) goto end_of_job; /* failed, so quit */ 2086: /* --- initialize subraster parameters --- */ 2087: sp->type = IMAGERASTER; /* stacked rasters */ 2088: sp->symdef = (base==1? symdef1 : (base==2? symdef2 : NULL)); /* symdef */ 2089: sp->baseline = baseline; /* composite baseline */ 2090: sp->size = (base==1? sp1->size : (base==2? sp2->size : NORMALSIZE)); /*size*/ 2091: /* --- extract raster from subraster --- */ 2092: rp = sp->image; /* raster embedded in subraster */ 2093: /* ------------------------------------------------------------------------- 2094: overlay sp1 and sp2 in new composite raster 2095: -------------------------------------------------------------------------- */ 2096: if ( iscenter == 1 ) /* center both sp1 and sp2 */ 2097: { rastput (rp, sp2->image, 0, (width-width2)/2, 1); /* overlay upper */ 2098: rastput (rp, sp1->image, height2+space, (width-width1)/2, 1); } /*lower*/ 2099: else /* left-justify both sp1 and sp2 */ 2100: { rastput (rp, sp2->image, 0, 0, 1); /* overlay upper */ 2101: rastput (rp, sp1->image, height2+space, 0, 1); } /*lower*/ 2102: /* ------------------------------------------------------------------------- 2103: free input if requested 2104: -------------------------------------------------------------------------- */ 2105: if ( isfree > 0 ) /* caller wants input freed */ 2106: { if ( isfree==1 || isfree>2 ) delete_subraster(sp1); /* free sp1 */ 2107: if ( isfree>=2 ) delete_subraster(sp2); } /* and/or sp2 */ 2108: /* ------------------------------------------------------------------------- 2109: Back to caller with pointer to stacked subraster or with null for error 2110: -------------------------------------------------------------------------- */ 2111: end_of_job: 2112: return ( sp ); /* back with subraster or null ptr */ 2113: } /* --- end-of-function rastack() --- */ 2114: 2115: 2116: /* ========================================================================== 2117: * Function: rastile ( tiles, ntiles ) 2118: * Purpose: Allocate and build up a composite raster 2119: * from the ntiles components/characters supplied in tiles. 2120: * -------------------------------------------------------------------------- 2121: * Arguments: tiles (I) subraster * to array of subraster structs 2122: * describing the components and their locations 2123: * ntiles (I) int containing number of subrasters in tiles[] 2124: * -------------------------------------------------------------------------- 2125: * Returns: ( raster * ) ptr to composite raster, 2126: * or NULL for any error. 2127: * -------------------------------------------------------------------------- 2128: * Notes: o The top,left corner of a raster is row=0,col=0 2129: * with row# increasing as you move down, 2130: * and col# increasing as you move right. 2131: * Metafont numbers rows with the baseline=0, 2132: * so the top row is a positive number that 2133: * decreases as you move down. 2134: * o rastile() is no longer used. 2135: * It was used by an earlier rasterize() algorithm, 2136: * and I've left it in place should it be needed again. 2137: * But recent changes haven't been tested/exercised. 2138: * ======================================================================= */ 2139: /* --- entry point --- */ 2140: raster *rastile ( subraster *tiles, int ntiles ) 2141: { 2142: /* ------------------------------------------------------------------------- 2143: Allocations and Declarations 2144: -------------------------------------------------------------------------- */ 2145: raster *new_raster(), *composite=(raster *)NULL; /*raster back to caller*/ 2146: int width=0, height=0, pixsz=0, /*width,height,pixsz of composite raster*/ 2147: toprow=9999, rightcol=-999, /* extreme upper-right corner of tiles */ 2148: botrow=-999, leftcol=9999; /* extreme lower-left corner of tiles */ 2149: int itile; /* tiles[] index */ 2150: int rastput(); /* overlay each tile in composite raster */ 2151: /* ------------------------------------------------------------------------- 2152: run through tiles[] to determine dimensions for composite raster 2153: -------------------------------------------------------------------------- */ 2154: /* --- determine row and column bounds of composite raster --- */ 2155: for ( itile=0; itile<ntiles; itile++ ) 2156: { 2157: subraster *tile = &(tiles[itile]); /* ptr to current tile */ 2158: /* --- upper-left corner of composite --- */ 2159: toprow = min2(toprow, tile->toprow); 2160: leftcol = min2(leftcol, tile->leftcol); 2161: /* --- lower-right corner of composite --- */ 2162: botrow = max2(botrow, tile->toprow + (tile->image)->height - 1); 2163: rightcol = max2(rightcol, tile->leftcol + (tile->image)->width - 1); 2164: /* --- pixsz of composite --- */ 2165: pixsz = max2(pixsz,(tile->image)->pixsz); 2166: } /* --- end-of-for(itile) --- */ 2167: /* --- calculate width and height from bounds --- */ 2168: width = rightcol - leftcol + 1; 2169: height = botrow - toprow + 1; 2170: /* --- sanity check (quit if bad dimensions) --- */ 2171: if ( width<1 || height<1 ) goto end_of_job; 2172: /* ------------------------------------------------------------------------- 2173: allocate composite raster, and embed tiles[] within it 2174: -------------------------------------------------------------------------- */ 2175: /* --- allocate composite raster --- */ 2176: if ( (composite=new_raster(width,height,pixsz)) /*allocate composite raster*/ 2177: == (raster *)NULL ) goto end_of_job; /* and quit if failed */ 2178: /* --- embed tiles[] in composite --- */ 2179: for ( itile=0; itile<ntiles; itile++ ) 2180: { subraster *tile = &(tiles[itile]); /* ptr to current tile */ 2181: rastput (composite, tile->image, /* overlay tile image at...*/ 2182: tile->toprow-toprow, tile->leftcol-leftcol, 1); } /*upper-left corner*/ 2183: /* ------------------------------------------------------------------------- 2184: Back to caller with composite raster (or null for any error) 2185: -------------------------------------------------------------------------- */ 2186: end_of_job: 2187: return ( composite ); /* back with composite or null ptr */ 2188: } /* --- end-of-function rastile() --- */ 2189: 2190: 2191: /* ========================================================================== 2192: * Function: rastsmash ( sp1, sp2 ) 2193: * Purpose: When concatanating sp1||sp2, calculate #pixels 2194: * we can "smash sp2 left" 2195: * -------------------------------------------------------------------------- 2196: * Arguments: sp1 (I) subraster * to left-hand raster 2197: * sp2 (I) subraster * to right-hand raster 2198: * -------------------------------------------------------------------------- 2199: * Returns: ( int ) max #pixels we can smash sp1||sp2, 2200: * or "blanksignal" if sp2 intentionally blank, 2201: * or 0 for any error. 2202: * -------------------------------------------------------------------------- 2203: * Notes: o 2204: * ======================================================================= */ 2205: /* --- entry point --- */ 2206: int rastsmash ( subraster *sp1, subraster *sp2 ) 2207: { 2208: /* ------------------------------------------------------------------------- 2209: Allocations and Declarations 2210: -------------------------------------------------------------------------- */ 2211: int nsmash = 0; /* #pixels to smash sp1||sp2 */ 2212: int base1 = sp1->baseline, /*baseline for left-hand subraster*/ 2213: height1 = (sp1->image)->height, /* height for left-hand subraster */ 2214: width1 = (sp1->image)->width, /* width for left-hand subraster */ 2215: base2 = sp2->baseline, /*baseline for right-hand subraster*/ 2216: height2 = (sp2->image)->height, /* height for right-hand subraster */ 2217: width2 = (sp2->image)->width; /* width for right-hand subraster */ 2218: int base = max2(base1,base2), /* max ascenders - 1 above baseline*/ 2219: top1=base-base1, top2=base-base2, /* top irow indexes for sp1, sp2 */ 2220: bot1=top1+height1-1, bot2=top2+height2-1, /* bot irow indexes */ 2221: height = max2(bot1,bot2)+1; /* total height */ 2222: int irow1=0,irow2=0, icol=0; /* row,col indexes */ 2223: int firstcol1[1025], nfirst1=0, /* 1st sp1 col containing set pixel*/ 2224: firstcol2[1025], nfirst2=0; /* 1st sp2 col containing set pixel*/ 2225: int smin=9999, xmin=9999,ymin=9999; /* min separation (s=x+y) */ 2226: int type_raster(); /* display debugging output */ 2227: /* ------------------------------------------------------------------------- 2228: find right edge of sp1 and left edge of sp2 (these will be abutting edges) 2229: -------------------------------------------------------------------------- */ 2230: /* --- check args --- */ 2231: if ( isstring ) goto end_of_job; /* ignore string rasters */ 2232: if ( 0 && istextmode ) goto end_of_job; /* don't smash in text mode */ 2233: if ( height > 1023 ) goto end_of_job; /* don't try to smash huge image */ 2234: if ( sp2->type == blanksignal ) /*blanksignal was propagated to us*/ 2235: goto end_of_job; /* don't smash intentional blank */ 2236: /* --- init firstcol1[], firstcol2[] --- */ 2237: for ( irow1=0; irow1<height; irow1++ ) /* for each row */ 2238: firstcol1[irow1] = firstcol2[irow1] = blanksignal; /* signal empty rows */ 2239: /* --- set firstcol2[] indicating left edge of sp2 --- */ 2240: for ( irow2=top2; irow2<=bot2; irow2++ ) /* for each row inside sp2 */ 2241: for ( icol=0; icol<width2; icol++ ) /* find first non-empty col in row */ 2242: if ( getpixel(sp2->image,irow2-top2,icol) != 0 ) /* found a set pixel */ 2243: { firstcol2[irow2] = icol; /* icol is #cols from left edge */ 2244: nfirst2++; /* bump #rows containing set pixels*/ 2245: break; } /* and go on to next row */ 2246: if ( nfirst2 < 1 ) /*right-hand sp2 is completely blank*/ 2247: { nsmash = blanksignal; /* signal intentional blanks */ 2248: goto end_of_job; } /* don't smash intentional blanks */ 2249: /* --- now check if preceding image in sp1 was an intentional blank --- */ 2250: if ( sp1->type == blanksignal ) /*blanksignal was propagated to us*/ 2251: goto end_of_job; /* don't smash intentional blank */ 2252: /* --- set firstcol1[] indicating right edge of sp1 --- */ 2253: for ( irow1=top1; irow1<=bot1; irow1++ ) /* for each row inside sp1 */ 2254: for ( icol=width1-1; icol>=0; icol-- ) /* find last non-empty col in row */ 2255: if ( getpixel(sp1->image,irow1-top1,icol) != 0 ) /* found a set pixel */ 2256: { firstcol1[irow1] = (width1-1)-icol; /* save #cols from right edge */ 2257: nfirst1++; /* bump #rows containing set pixels*/ 2258: break; } /* and go on to next row */ 2259: if ( nfirst1 < 1 ) /*left-hand sp1 is completely blank*/ 2260: goto end_of_job; /* don't smash intentional blanks */ 2261: /* ------------------------------------------------------------------------- 2262: find minimum separation 2263: -------------------------------------------------------------------------- */ 2264: for ( irow2=top2; irow2<=bot2; irow2++ ) { /* check each row inside sp2 */ 2265: int margin1, margin2=firstcol2[irow2]; /* #cols to first set pixel */ 2266: if ( margin2 != blanksignal ) { /* irow2 not an empty/blank row */ 2267: for ( irow1=max2(irow2-smin,top1); ; irow1++ ) 2268: if ( irow1 > min2(irow2+smin,bot1) ) break; /* upper bound check */ 2269: else 2270: if ( (margin1=firstcol1[irow1]) != blanksignal ) { /*have non-blank row*/ 2271: int dx=(margin1+margin2), dy=absval(irow2-irow1), ds=dx+dy; /* deltas */ 2272: if ( ds >= smin ) continue; /* min unchanged */ 2273: if ( dy>smashmargin && dx<xmin && smin<9999 ) continue; /* dy alone */ 2274: smin=ds; xmin=dx; ymin=dy; /* set new min */ 2275: } /* --- end-of-if(margin1!=blanksignal) --- */ 2276: } /* --- end-of-if(margin2!=blanksignal) --- */ 2277: if ( smin<2 ) goto end_of_job; /* can't smash */ 2278: } /* --- end-of-for(irow2) --- */ 2279: /*nsmash = min2(xmin,width2);*/ /* permissible smash */ 2280: nsmash = xmin; /* permissible smash */ 2281: /* ------------------------------------------------------------------------- 2282: Back to caller with #pixels to smash sp1||sp2 2283: -------------------------------------------------------------------------- */ 2284: end_of_job: 2285: /* --- debugging output --- */ 2286: if ( msgfp!=NULL && msglevel >= 99 ) /* display for debugging */ 2287: { fprintf(msgfp,"rastsmash> nsmash=%d, smashmargin=%d\n", 2288: nsmash,smashmargin); 2289: if ( msglevel >= 999 ) /* also display rasters */ 2290: { fprintf(msgfp,"rastsmash>left-hand image...\n"); 2291: if(sp1!=NULL) type_raster(sp1->image,msgfp); /* left image */ 2292: fprintf(msgfp,"rastsmash>right-hand image...\n"); 2293: if(sp2!=NULL) type_raster(sp2->image,msgfp); } /* right image */ 2294: fflush(msgfp); } 2295: return ( nsmash ); /* back with #smash pixels */ 2296: } /* --- end-of-function rastsmash() --- */ 2297: 2298: 2299: /* ========================================================================== 2300: * Function: rastsmashcheck ( term ) 2301: * Purpose: Check an exponent term to see if its leading symbol 2302: * would make smashing dangerous 2303: * -------------------------------------------------------------------------- 2304: * Arguments: term (I) char * to null-terminated string 2305: * containing right-hand exponent term about to 2306: * be smashed against existing left-hand. 2307: * -------------------------------------------------------------------------- 2308: * Returns: ( int ) 1 if it's okay to smash term, or 2309: * 0 if smash is dangerous. 2310: * -------------------------------------------------------------------------- 2311: * Notes: o 2312: * ======================================================================= */ 2313: /* --- entry point --- */ 2314: int rastsmashcheck ( char *term ) 2315: { 2316: /* ------------------------------------------------------------------------- 2317: Allocations and Declarations 2318: -------------------------------------------------------------------------- */ 2319: int isokay = 0; /* 1 to signal okay to caller */ 2320: static char nosmashchars[64] = "-.,="; /* don't smash these leading chars */ 2321: static char *nosmashstrs[64] = { "\\frac", NULL }; /* or leading strings */ 2322: static char *grayspace[64] = { "\\tiny", "\\small", "\\normalsize", 2323: "\\large", "\\Large", "\\LARGE", "\\huge", "\\Huge", NULL }; 2324: char *expression = term; /* local ptr to beginning of expression */ 2325: char *token = NULL; int i; /* token = nosmashstrs[i] or grayspace[i] */ 2326: /* ------------------------------------------------------------------------- 2327: see if smash check enabled 2328: -------------------------------------------------------------------------- */ 2329: if ( smashcheck < 1 ) { /* no smash checking wanted */ 2330: if ( smashcheck >= 0 ) /* -1 means check should always fail */ 2331: isokay = 1; /* otherwise (if 0), signal okay to smash */ 2332: goto end_of_job; } /* return to caller */ 2333: /* ------------------------------------------------------------------------- 2334: skip leading white and gray space 2335: -------------------------------------------------------------------------- */ 2336: /* --- first check input --- */ 2337: if ( isempty(term) ) goto end_of_job; /* no input so return 0 to caller */ 2338: /* --- skip leading white space --- */ 2339: skipwhite(term); /* skip leading white space */ 2340: if ( *term == '\000' ) goto end_of_job; /* nothing but white space */ 2341: /* --- skip leading gray space --- */ 2342: skipgray: 2343: for ( i=0; (token=grayspace[i]) != NULL; i++ ) /* check each grayspace */ 2344: if ( strncmp(term,token,strlen(token)) == 0 ) { /* found grayspace */ 2345: term += strlen(token); /* skip past this grayspace token */ 2346: skipwhite(term); /* and skip any subsequent white space */ 2347: if ( *term == '\000' ) { /* nothing left so quit */ 2348: if ( msgfp!=NULL && msglevel >= 99 ) /* display for debugging */ 2349: fprintf(msgfp,"rastsmashcheck> only grayspace in %.32s\n",expression); 2350: goto end_of_job; } 2351: goto skipgray; } /* restart grayspace check from beginning */ 2352: /* ------------------------------------------------------------------------- 2353: check for leading no-smash single char 2354: -------------------------------------------------------------------------- */ 2355: /* --- don't smash if term begins with a "nosmash" char --- */ 2356: if ( (token=strchr(nosmashchars,*term)) != NULL ) { 2357: if ( msgfp!=NULL && msglevel >= 99 ) /* display for debugging */ 2358: fprintf(msgfp,"rastsmashcheck> char %.1s found in %.32s\n",token,term); 2359: goto end_of_job; } 2360: /* ------------------------------------------------------------------------- 2361: check for leading no-smash token 2362: -------------------------------------------------------------------------- */ 2363: for ( i=0; (token=nosmashstrs[i]) != NULL; i++ ) /* check each nosmashstr */ 2364: if ( strncmp(term,token,strlen(token)) == 0 ) { /* found a nosmashstr */ 2365: if ( msgfp!=NULL && msglevel >= 99 ) /* display for debugging */ 2366: fprintf(msgfp,"rastsmashcheck> token %s found in %.32s\n",token,term); 2367: goto end_of_job; } /* so don't smash term */ 2368: /* ------------------------------------------------------------------------- 2369: back to caller 2370: -------------------------------------------------------------------------- */ 2371: isokay = 1; /* no problem, so signal okay to smash */ 2372: end_of_job: 2373: if ( msgfp!=NULL && msglevel >= 999 ) /* display for debugging */ 2374: fprintf(msgfp,"rastsmashcheck> returning isokay=%d for \"%.32s\"\n", 2375: isokay,(expression==NULL?"<no input>":expression)); 2376: return ( isokay ); /* back to caller with 1 if okay to smash */ 2377: } /* --- end-of-function rastsmashcheck() --- */ 2378: 2379: 2380: /* ========================================================================== 2381: * Function: accent_subraster ( accent, width, height, direction, pixsz ) 2382: * Purpose: Allocate a new subraster of width x height 2383: * (or maybe different dimensions, depending on accent), 2384: * and draw an accent (\hat or \vec or \etc) that fills it 2385: * -------------------------------------------------------------------------- 2386: * Arguments: accent (I) int containing either HATACCENT or VECACCENT, 2387: * etc, indicating the type of accent desired 2388: * width (I) int containing desired width of accent (#cols) 2389: * height (I) int containing desired height of accent(#rows) 2390: * direction (I) int containing desired direction of accent, 2391: * +1=right, -1=left, 0=left/right 2392: * pixsz (I) int containing 1 for bitmap, 8 for bytemap 2393: * -------------------------------------------------------------------------- 2394: * Returns: ( subraster * ) ptr to newly-allocated subraster with accent, 2395: * or NULL for any error. 2396: * -------------------------------------------------------------------------- 2397: * Notes: o Some accents have internally-determined dimensions, 2398: * and caller should check dimensions in returned subraster 2399: * ======================================================================= */ 2400: /* --- entry point --- */ 2401: subraster *accent_subraster ( int accent, int width, int height, 2402: int direction, int pixsz ) 2403: { 2404: /* ------------------------------------------------------------------------- 2405: Allocations and Declarations 2406: -------------------------------------------------------------------------- */ 2407: /* --- general info --- */ 2408: raster *new_raster(), *rp=NULL; /*raster containing desired accent*/ 2409: subraster *new_subraster(), *sp=NULL; /* subraster returning accent */ 2410: int delete_raster(), delete_subraster(); /*free allocated raster on err*/ 2411: int line_raster(), /* draws lines */ 2412: rule_raster(), /* draw solid boxes */ 2413: thickness = 1; /* line thickness */ 2414: /*int pixval = (pixsz==1? 1 : (pixsz==8?255:(-1)));*/ /*black pixel value*/ 2415: /* --- other working info --- */ 2416: int col0, col1, /* cols for line */ 2417: row0, row1; /* rows for line */ 2418: subraster *get_delim(), *accsp=NULL; /*find suitable cmex10 symbol/accent*/ 2419: /* --- info for under/overbraces, tildes, etc --- */ 2420: char brace[16]; /*"{" for over, "}" for under, etc*/ 2421: raster *rastrot(), /* rotate { for overbrace, etc */ 2422: *rastcpy(); /* may need copy of original */ 2423: subraster *arrow_subraster(); /* rightarrow for vec */ 2424: subraster *rastack(); /* stack accent atop extra space */ 2425: int iswidthneg = 0; /* set true if width<0 arg passed */ 2426: int serifwidth=0; /* serif for surd */ 2427: int isBig=0; /* true for ==>arrow, false for -->*/ 2428: /* ------------------------------------------------------------------------- 2429: initialization 2430: -------------------------------------------------------------------------- */ 2431: if ( width < 0 ) { width=(-width); iswidthneg=1; } /* set neg width flag */ 2432: /* ------------------------------------------------------------------------- 2433: outer switch() traps accents that may change caller's height,width 2434: -------------------------------------------------------------------------- */ 2435: switch ( accent ) 2436: { 2437: default: 2438: /* ----------------------------------------------------------------------- 2439: inner switch() first allocates fixed-size raster for accents that don't 2440: ------------------------------------------------------------------------ */ 2441: if ( (rp = new_raster(width,height,pixsz)) /* allocate fixed-size raster */ 2442: != NULL ) /* and if we succeeded... */ 2443: switch ( accent ) /* ...draw requested accent in it */ 2444: { 2445: /* --- unrecognized request --- */ 2446: default: delete_raster(rp); /* unrecognized accent requested */ 2447: rp = NULL; break; /* so free raster and signal error */ 2448: /* --- bar request --- */ 2449: case UNDERBARACCENT: 2450: case BARACCENT: 2451: thickness = 1; /*height-1;*/ /* adjust thickness */ 2452: if ( accent == BARACCENT ) /* bar is above expression */ 2453: { row0 = row1 = max2(height-3,0); /* row numbers for overbar */ 2454: line_raster(rp,row0,0,row1,width-1,thickness); } /*blanks at bot*/ 2455: else /* underbar is below expression */ 2456: { row0 = row1 = min2(2,height-1); /* row numbers for underbar */ 2457: line_raster(rp,row0,0,row1,width-1,thickness); } /*blanks at top*/ 2458: break; 2459: /* --- dot request --- */ 2460: case DOTACCENT: 2461: thickness = height-1; /* adjust thickness */ 2462: /*line_raster(rp,0,width/2,1,(width/2)+1,thickness);*//*centered dot*/ 2463: rule_raster(rp,0,(width+1-thickness)/2,thickness,thickness,3); /*box*/ 2464: break; 2465: /* --- ddot request --- */ 2466: case DDOTACCENT: 2467: thickness = height-1; /* adjust thickness */ 2468: col0 = max2((width+1)/3-(thickness/2)-1,0); /* one-third of width */ 2469: col1 = min2((2*width+1)/3-(thickness/2)+1,width-thickness); /*2/3rds*/ 2470: if ( col0+thickness >= col1 ) /* dots overlap */ 2471: { col0 = max2(col0-1,0); /* try moving left dot more left */ 2472: col1 = min2(col1+1,width-thickness); } /* and right dot right */ 2473: if ( col0+thickness >= col1 ) /* dots _still_ overlap */ 2474: thickness = max2(thickness-1,1); /* so try reducing thickness */ 2475: /*line_raster(rp,0,col0,1,col0+1,thickness);*//*set dot at 1st third*/ 2476: /*line_raster(rp,0,col1,1,col1+1,thickness);*//*and another at 2nd*/ 2477: rule_raster(rp,0,col0,thickness,thickness,3); /*box at 1st third*/ 2478: rule_raster(rp,0,col1,thickness,thickness,3); /*box at 2nd third*/ 2479: break; 2480: /* --- hat request --- */ 2481: case HATACCENT: 2482: thickness = 1; /*(width<=12? 2 : 3);*/ /* adjust thickness */ 2483: line_raster(rp,height-1,0,0,width/2,thickness); /* / part of hat*/ 2484: line_raster(rp,0,(width-1)/2,height-1,width-1,thickness); /* \ part*/ 2485: break; 2486: /* --- sqrt request --- */ 2487: case SQRTACCENT: 2488: serifwidth = SURDSERIFWIDTH(height); /* leading serif on surd */ 2489: col1 = SQRTWIDTH(height,(iswidthneg?1:2)) - 1; /*right col of sqrt*/ 2490: /*col0 = (col1-serifwidth+2)/3;*/ /* midpoint col of sqrt */ 2491: col0 = (col1-serifwidth+1)/2; /* midpoint col of sqrt */ 2492: row0 = max2(1,((height+1)/2)-2); /* midpoint row of sqrt */ 2493: row1 = height-1; /* bottom row of sqrt */ 2494: /*line_raster(rp,row0,0,row1,col0,thickness);*/ /*descending portion*/ 2495: line_raster(rp,row0+serifwidth,0,row0,serifwidth,thickness); 2496: line_raster(rp,row0,serifwidth,row1,col0,thickness); /* descending */ 2497: line_raster(rp,row1,col0,0,col1,thickness); /* ascending portion */ 2498: line_raster(rp,0,col1,0,width-1,thickness); /*overbar of thickness 1*/ 2499: break; 2500: } /* --- end-of-inner-switch(accent) --- */ 2501: break; /* break from outer accent switch */ 2502: /* --- underbrace, overbrace request --- */ 2503: case UNDERBRACE: 2504: case OVERBRACE: 2505: if ( accent == UNDERBRACE ) strcpy(brace,"}"); /* start with } brace */ 2506: if ( accent == OVERBRACE ) strcpy(brace,"{"); /* start with { brace */ 2507: if ( (accsp=get_delim(brace,width,CMEX10)) /* use width for height */ 2508: != NULL ) /* found desired brace */ 2509: { rp = rastrot(accsp->image); /* rotate 90 degrees clockwise */ 2510: delete_subraster(accsp); } /* and free subraster "envelope" */ 2511: break; 2512: /* --- hat request --- */ 2513: case HATACCENT: 2514: if ( accent == HATACCENT ) strcpy(brace,"<"); /* start with < */ 2515: if ( (accsp=get_delim(brace,width,CMEX10)) /* use width for height */ 2516: != NULL ) /* found desired brace */ 2517: { rp = rastrot(accsp->image); /* rotate 90 degrees clockwise */ 2518: delete_subraster(accsp); } /* and free subraster "envelope" */ 2519: break; 2520: /* --- vec request --- */ 2521: case VECACCENT: 2522: height = 2*(height/2) + 1; /* force height odd */ 2523: if ( absval(direction) >= 9 ) { /* want ==> arrow rather than --> */ 2524: isBig = 1; /* signal "Big" arrow */ 2525: direction -= 10; } /* reset direction = +1, -1, or 0 */ 2526: if ((accsp=arrow_subraster(width,height,pixsz,direction,isBig)) /*arrow*/ 2527: != NULL ) /* succeeded */ 2528: { rp = accsp->image; /* "extract" raster with bitmap */ 2529: free((void *)accsp); } /* and free subraster "envelope" */ 2530: break; 2531: /* --- tilde request --- */ 2532: case TILDEACCENT: 2533: accsp=(width<25? get_delim("\\sim",-width,CMSY10) : 2534: get_delim("~",-width,CMEX10)); /*width search for tilde*/ 2535: if ( accsp != NULL ) /* found desired tilde */ 2536: if ( (sp=rastack(new_subraster(1,1,pixsz),accsp,1,0,1,3))/*space below*/ 2537: != NULL ) /* have tilde with space below it */ 2538: { rp = sp->image; /* "extract" raster with bitmap */ 2539: free((void *)sp); /* and free subraster "envelope" */ 2540: leftsymdef = NULL; } /* so \tilde{x}^2 works properly */ 2541: break; 2542: } /* --- end-of-outer-switch(accent) --- */ 2543: /* ------------------------------------------------------------------------- 2544: if we constructed accent raster okay, embed it in a subraster and return it 2545: -------------------------------------------------------------------------- */ 2546: /* --- if all okay, allocate subraster to contain constructed raster --- */ 2547: if ( rp != NULL ) { /* accent raster constructed okay */ 2548: if ( (sp=new_subraster(0,0,0)) /* allocate subraster "envelope" */ 2549: == NULL ) /* and if we fail to allocate */ 2550: delete_raster(rp); /* free now-unneeded raster */ 2551: else /* subraster allocated okay */ 2552: { /* --- init subraster parameters, embedding raster in it --- */ 2553: sp->type = IMAGERASTER; /* constructed image */ 2554: sp->image = rp; /* raster we just constructed */ 2555: sp->size = (-1); /* can't set font size here */ 2556: sp->baseline = 0; } /* can't set baseline here */ 2557: } /* --- end-of-if(rp!=NULL) --- */ 2558: /* --- return subraster containing desired accent to caller --- */ 2559: return ( sp ); /* return accent or NULL to caller */ 2560: } /* --- end-of-function accent_subraster() --- */ 2561: 2562: 2563: /* ========================================================================== 2564: * Function: arrow_subraster ( width, height, pixsz, drctn, isBig ) 2565: * Purpose: Allocate a raster/subraster and draw left/right arrow in it 2566: * -------------------------------------------------------------------------- 2567: * Arguments: width (I) int containing number of cols for arrow 2568: * height (I) int containing number of rows for arrow 2569: * pixsz (I) int containing 1 for bitmap, 8 for bytemap 2570: * drctn (I) int containing +1 for right arrow, 2571: * or -1 for left, 0 for leftright 2572: * isBig (I) int containing 1/true for \Long arrows, 2573: * or false for \long arrows, i.e., 2574: * true for ===> or false for --->. 2575: * -------------------------------------------------------------------------- 2576: * Returns: ( subraster * ) ptr to constructed left/right arrow 2577: * or NULL for any error. 2578: * -------------------------------------------------------------------------- 2579: * Notes: o 2580: * ======================================================================= */ 2581: /* --- entry point --- */ 2582: subraster *arrow_subraster ( int width, int height, int pixsz, 2583: int drctn, int isBig ) 2584: { 2585: /* ------------------------------------------------------------------------- 2586: Allocations and Declarations 2587: -------------------------------------------------------------------------- */ 2588: subraster *new_subraster(), *arrowsp=NULL; /* allocate arrow subraster */ 2589: int rule_raster(); /* draw arrow line */ 2590: int irow, midrow=height/2; /* index, midrow is arrowhead apex */ 2591: int icol, thickness=(height>15?2:2); /* arrowhead thickness and index */ 2592: int pixval = (pixsz==1? 1 : (pixsz==8?255:(-1))); /* black pixel value */ 2593: int ipix, /* raster pixmap[] index */ 2594: npix = width*height; /* #pixels malloced in pixmap[] */ 2595: /* ------------------------------------------------------------------------- 2596: allocate raster/subraster and draw arrow line 2597: -------------------------------------------------------------------------- */ 2598: if ( height < 3 ) { height=3; midrow=1; } /* set minimum height */ 2599: if ( (arrowsp=new_subraster(width,height,pixsz)) /* allocate empty raster */ 2600: == NULL ) goto end_of_job; /* and quit if failed */ 2601: if ( !isBig ) /* single line */ 2602: rule_raster(arrowsp->image,midrow,0,width,1,0); /*draw line across midrow*/ 2603: else 2604: { int delta = (width>6? (height>15? 3: (height>7? 2 : 1)) : 1); 2605: rule_raster(arrowsp->image,midrow-delta,delta,width-2*delta,1,0); 2606: rule_raster(arrowsp->image,midrow+delta,delta,width-2*delta,1,0); } 2607: /* ------------------------------------------------------------------------- 2608: construct arrowhead(s) 2609: -------------------------------------------------------------------------- */ 2610: for ( irow=0; irow<height; irow++ ) /* for each row of arrow */ 2611: { 2612: int delta = abs(irow-midrow); /*arrowhead offset for irow*/ 2613: /* --- right arrowhead --- */ 2614: if ( drctn >= 0 ) /* right arrowhead wanted */ 2615: for ( icol=0; icol<thickness; icol++ ) /* for arrowhead thickness */ 2616: { ipix = ((irow+1)*width - 1) - delta - icol; /* rightmost-delta-icol */ 2617: if ( ipix >= 0 ) { /* bounds check */ 2618: if ( pixsz == 1 ) /* have a bitmap */ 2619: setlongbit((arrowsp->image)->pixmap,ipix);/*turn on arrowhead bit*/ 2620: else /* should have a bytemap */ 2621: if ( pixsz == 8 ) /* check pixsz for bytemap */ 2622: ((arrowsp->image)->pixmap)[ipix] = pixval; } }/*set arrowhead byte*/ 2623: /* --- left arrowhead (same as right except for ipix calculation) --- */ 2624: if ( drctn <= 0 ) /* left arrowhead wanted */ 2625: for ( icol=0; icol<thickness; icol++ ) /* for arrowhead thickness */ 2626: { ipix = irow*width + delta + icol; /* leftmost bit+delta+icol */ 2627: if ( ipix < npix ) { /* bounds check */ 2628: if ( pixsz == 1 ) /* have a bitmap */ 2629: setlongbit((arrowsp->image)->pixmap,ipix);/*turn on arrowhead bit*/ 2630: else /* should have a bytemap */ 2631: if ( pixsz == 8 ) /* check pixsz for bytemap */ 2632: ((arrowsp->image)->pixmap)[ipix] = pixval; } }/*set arrowhead byte*/ 2633: } /* --- end-of-for(irow) --- */ 2634: end_of_job: 2635: return ( arrowsp ); /*back to caller with arrow or NULL*/ 2636: } /* --- end-of-function arrow_subraster() --- */ 2637: 2638: 2639: /* ========================================================================== 2640: * Function: uparrow_subraster ( width, height, pixsz, drctn, isBig ) 2641: * Purpose: Allocate a raster/subraster and draw up/down arrow in it 2642: * -------------------------------------------------------------------------- 2643: * Arguments: width (I) int containing number of cols for arrow 2644: * height (I) int containing number of rows for arrow 2645: * pixsz (I) int containing 1 for bitmap, 8 for bytemap 2646: * drctn (I) int containing +1 for up arrow, 2647: * or -1 for down, or 0 for updown 2648: * isBig (I) int containing 1/true for \Long arrows, 2649: * or false for \long arrows, i.e., 2650: * true for ===> or false for --->. 2651: * -------------------------------------------------------------------------- 2652: * Returns: ( subraster * ) ptr to constructed up/down arrow 2653: * or NULL for any error. 2654: * -------------------------------------------------------------------------- 2655: * Notes: o 2656: * ======================================================================= */ 2657: /* --- entry point --- */ 2658: subraster *uparrow_subraster ( int width, int height, int pixsz, 2659: int drctn, int isBig ) 2660: { 2661: /* ------------------------------------------------------------------------- 2662: Allocations and Declarations 2663: -------------------------------------------------------------------------- */ 2664: subraster *new_subraster(), *arrowsp=NULL; /* allocate arrow subraster */ 2665: int rule_raster(); /* draw arrow line */ 2666: int icol, midcol=width/2; /* index, midcol is arrowhead apex */ 2667: int irow, thickness=(width>15?2:2); /* arrowhead thickness and index */ 2668: int pixval = (pixsz==1? 1 : (pixsz==8?255:(-1))); /* black pixel value */ 2669: int ipix, /* raster pixmap[] index */ 2670: npix = width*height; /* #pixels malloced in pixmap[] */ 2671: /* ------------------------------------------------------------------------- 2672: allocate raster/subraster and draw arrow line 2673: -------------------------------------------------------------------------- */ 2674: if ( width < 3 ) { width=3; midcol=1; } /* set minimum width */ 2675: if ( (arrowsp=new_subraster(width,height,pixsz)) /* allocate empty raster */ 2676: == NULL ) goto end_of_job; /* and quit if failed */ 2677: if ( !isBig ) /* single line */ 2678: rule_raster(arrowsp->image,0,midcol,1,height,0); /*draw line down midcol*/ 2679: else 2680: { int delta = (height>6? (width>15? 3: (width>7? 2 : 1)) : 1); 2681: rule_raster(arrowsp->image,delta,midcol-delta,1,height-2*delta,0); 2682: rule_raster(arrowsp->image,delta,midcol+delta,1,height-2*delta,0); } 2683: /* ------------------------------------------------------------------------- 2684: construct arrowhead(s) 2685: -------------------------------------------------------------------------- */ 2686: for ( icol=0; icol<width; icol++ ) /* for each col of arrow */ 2687: { 2688: int delta = abs(icol-midcol); /*arrowhead offset for icol*/ 2689: /* --- up arrowhead --- */ 2690: if ( drctn >= 0 ) /* up arrowhead wanted */ 2691: for ( irow=0; irow<thickness; irow++ ) /* for arrowhead thickness */ 2692: { ipix = (irow+delta)*width + icol; /* leftmost+icol */ 2693: if ( ipix < npix ) { /* bounds check */ 2694: if ( pixsz == 1 ) /* have a bitmap */ 2695: setlongbit((arrowsp->image)->pixmap,ipix);/*turn on arrowhead bit*/ 2696: else /* should have a bytemap */ 2697: if ( pixsz == 8 ) /* check pixsz for bytemap */ 2698: ((arrowsp->image)->pixmap)[ipix] = pixval; } }/*set arrowhead byte*/ 2699: /* --- down arrowhead (same as up except for ipix calculation) --- */ 2700: if ( drctn <= 0 ) /* down arrowhead wanted */ 2701: for ( irow=0; irow<thickness; irow++ ) /* for arrowhead thickness */ 2702: { ipix = (height-1-delta-irow)*width + icol; /* leftmost + icol */ 2703: if ( ipix > 0 ) { /* bounds check */ 2704: if ( pixsz == 1 ) /* have a bitmap */ 2705: setlongbit((arrowsp->image)->pixmap,ipix);/*turn on arrowhead bit*/ 2706: else /* should have a bytemap */ 2707: if ( pixsz == 8 ) /* check pixsz for bytemap */ 2708: ((arrowsp->image)->pixmap)[ipix] = pixval; } }/*set arrowhead byte*/ 2709: } /* --- end-of-for(icol) --- */ 2710: end_of_job: 2711: return ( arrowsp ); /*back to caller with arrow or NULL*/ 2712: } /* --- end-of-function uparrow_subraster() --- */ 2713: 2714: 2715: /* ========================================================================== 2716: * Function: rule_raster ( rp, top, left, width, height, type ) 2717: * Purpose: Draw a solid or dashed line (or box) in existing raster rp, 2718: * starting at top,left with dimensions width,height. 2719: * -------------------------------------------------------------------------- 2720: * Arguments: rp (I) raster * to raster in which rule 2721: * will be drawn 2722: * top (I) int containing row at which top-left corner 2723: * of rule starts (0 is topmost) 2724: * left (I) int containing col at which top-left corner 2725: * of rule starts (0 is leftmost) 2726: * width (I) int containing number of cols for rule 2727: * height (I) int containing number of rows for rule 2728: * type (I) int containing 0 for solid rule, 2729: * 1 for horizontal dashes, 2 for vertical 2730: * 3 for solid rule with corners removed (bevel) 2731: * 4 for strut (nothing drawn) 2732: * -------------------------------------------------------------------------- 2733: * Returns: ( int ) 1 if rule drawn okay, 2734: * or 0 for any error. 2735: * -------------------------------------------------------------------------- 2736: * Notes: o Rule line is implicitly "horizontal" or "vertical" depending 2737: * on relative width,height dimensions. It's a box if they're 2738: * more or less comparable. 2739: * ======================================================================= */ 2740: /* --- entry point --- */ 2741: int rule_raster ( raster *rp, int top, int left, 2742: int width, int height, int type ) 2743: { 2744: /* ------------------------------------------------------------------------- 2745: Allocations and Declarations 2746: -------------------------------------------------------------------------- */ 2747: int irow=0, icol=0; /* indexes over rp raster */ 2748: int ipix = 0, /* raster pixmap[] index */ 2749: npix = rp->width * rp->height; /* #pixels malloced in rp->pixmap[] */ 2750: int isfatal = 0; /* true to abend on out-of-bounds error */ 2751: int hdash=1, vdash=2, /* type for horizontal, vertical dashes */ 2752: bevel=99/*3*/, strut=4; /* type for bevel (turned off), strut */ 2753: int dashlen=3, spacelen=2, /* #pixels for dash followed by space */ 2754: isdraw=1; /* true when drawing dash (init for solid) */ 2755: /* ------------------------------------------------------------------------- 2756: Check args 2757: -------------------------------------------------------------------------- */ 2758: if ( rp == (raster *)NULL ) { /* no raster arg supplied */ 2759: if ( workingbox != (subraster *)NULL ) /* see if we have a workingbox */ 2760: rp = workingbox->image; /* use workingbox if possible */ 2761: else return ( 0 ); } /* otherwise signal error to caller */ 2762: if ( type == bevel ) /* remove corners of solid box */ 2763: if ( width<3 || height<3 ) type=0; /* too small to remove corners */ 2764: /* ------------------------------------------------------------------------- 2765: Fill line/box 2766: -------------------------------------------------------------------------- */ 2767: if ( width > 0 ) /* zero width implies strut*/ 2768: for ( irow=top; irow<top+height; irow++ ) /* for each scan line */ 2769: { 2770: if ( type == strut ) isdraw = 0; /* draw nothing for strut */ 2771: if ( type == vdash ) /*set isdraw for vert dash*/ 2772: isdraw = (((irow-top)%(dashlen+spacelen)) < dashlen); 2773: ipix = irow*rp->width + left - 1; /*first pixel preceding icol*/ 2774: for ( icol=left; icol<left+width; icol++ ) /* each pixel in scan line */ 2775: { 2776: if ( type == bevel ) { /* remove corners of box */ 2777: if ( (irow==top && icol==left) /* top-left corner */ 2778: || (irow==top && icol>=left+width-1) /* top-right corner */ 2779: || (irow>=top+height-1 && icol==left) /* bottom-left corner */ 2780: || (irow>=top+height-1 && icol>=left+width-1) ) /* bottom-right */ 2781: isdraw = 0; else isdraw = 1; } /*set isdraw to skip corner*/ 2782: if ( type == hdash ) /*set isdraw for horiz dash*/ 2783: isdraw = (((icol-left)%(dashlen+spacelen)) < dashlen); 2784: if ( ++ipix >= npix ) /* bounds check failed */ 2785: if ( isfatal ) goto end_of_job; /* abort if error is fatal */ 2786: else break; /*or just go on to next row*/ 2787: else /*ibit is within rp bounds*/ 2788: if ( isdraw ) { /*and we're drawing this bit*/ 2789: if ( rp->pixsz == 1 ) /* have a bitmap */ 2790: setlongbit(rp->pixmap,ipix); /* so turn on bit in line */ 2791: else /* should have a bytemap */ 2792: if ( rp->pixsz == 8 ) /* check pixsz for bytemap */ 2793: ((unsigned char *)(rp->pixmap))[ipix] = 255; } /* set black byte */ 2794: } /* --- end-of-for(icol) --- */ 2795: } /* --- end-of-for(irow) --- */ 2796: end_of_job: 2797: return ( isfatal? (ipix<npix? 1:0) : 1 ); 2798: } /* --- end-of-function rule_raster() --- */ 2799: 2800: 2801: /* ========================================================================== 2802: * Function: line_raster ( rp, row0, col0, row1, col1, thickness ) 2803: * Purpose: Draw a line from row0,col0 to row1,col1 of thickness 2804: * in existing raster rp. 2805: * -------------------------------------------------------------------------- 2806: * Arguments: rp (I) raster * to raster in which a line 2807: * will be drawn 2808: * row0 (I) int containing row at which 2809: * line will start (0 is topmost) 2810: * col0 (I) int containing col at which 2811: * line will start (0 is leftmost) 2812: * row1 (I) int containing row at which 2813: * line will end (rp->height-1 is bottom-most) 2814: * col1 (I) int containing col at which 2815: * line will end (rp->width-1 is rightmost) 2816: * thickness (I) int containing number of pixels/bits 2817: * thick the line will be 2818: * -------------------------------------------------------------------------- 2819: * Returns: ( int ) 1 if line drawn okay, 2820: * or 0 for any error. 2821: * -------------------------------------------------------------------------- 2822: * Notes: o if row0==row1, a horizontal line is drawn 2823: * between col0 and col1, with row0(==row1) the top row 2824: * and row0+(thickness-1) the bottom row 2825: * o if col0==col1, a vertical bar is drawn 2826: * between row0 and row1, with col0(==col1) the left col 2827: * and col0+(thickness-1) the right col 2828: * o if both the above, you get a square thickness x thickness 2829: * whose top-left corner is row0,col0. 2830: * ======================================================================= */ 2831: /* --- entry point --- */ 2832: int line_raster ( raster *rp, int row0, int col0, 2833: int row1, int col1, int thickness ) 2834: { 2835: /* ------------------------------------------------------------------------- 2836: Allocations and Declarations 2837: -------------------------------------------------------------------------- */ 2838: int irow=0, icol=0, /* indexes over rp raster */ 2839: locol=col0, hicol=col1, /* col limits at irow */ 2840: lorow=row0, hirow=row1; /* row limits at icol */ 2841: int width=rp->width, height=rp->height; /* dimensions of input raster */ 2842: int ipix = 0, /* raster pixmap[] index */ 2843: npix = width*height; /* #pixels malloced in rp->pixmap[] */ 2844: int isfatal = 0; /* true to abend on out-of-bounds error */ 2845: int isline=(row1==row0), isbar=(col1==col0); /*true if slope a=0,\infty*/ 2846: double dy = row1-row0 /* + (row1>=row0? +1.0 : -1.0) */, /* delta-x */ 2847: dx = col1-col0 /* + (col1>=col0? +1.0 : -1.0) */, /* delta-y */ 2848: a= (isbar||isline? 0.0 : dy/dx), /* slope = tan(theta) = dy/dx */ 2849: xcol=0, xrow=0; /* calculated col at irow, or row at icol */ 2850: double ar = ASPECTRATIO, /* aspect ratio width/height of one pixel */ 2851: xwidth= (isline? 0.0 : /*#pixels per row to get sloped line thcknss*/ 2852: ((double)thickness)*sqrt((dx*dx)+(dy*dy*ar*ar))/fabs(dy*ar)), 2853: xheight = 1.0; 2854: int line_recurse(), isrecurse=1; /* true to draw line recursively */ 2855: /* ------------------------------------------------------------------------- 2856: Check args 2857: -------------------------------------------------------------------------- */ 2858: if ( rp == (raster *)NULL ) { /* no raster arg supplied */ 2859: if ( workingbox != (subraster *)NULL ) /* see if we have a workingbox */ 2860: rp = workingbox->image; /* use workingbox if possible */ 2861: else return ( 0 ); } /* otherwise signal error to caller */ 2862: /* ------------------------------------------------------------------------- 2863: Initialization 2864: -------------------------------------------------------------------------- */ 2865: if ( msgfp!=NULL && msglevel>=29 ) { /* debugging */ 2866: fprintf(msgfp,"line_raster> row,col0=%d,%d row,col1=%d,%d, thickness=%d\n" 2867: "\t dy,dx=%3.1f,%3.1f, a=%4.3f, xwidth=%4.3f\n", 2868: row0,col0, row1,col1, thickness, dy,dx, a, xwidth); fflush(msgfp); } 2869: /* --- check for recursive line drawing --- */ 2870: if ( isrecurse ) { /* drawing lines recursively */ 2871: for ( irow=0; irow<thickness; irow++ ) /* each line 1 pixel thick */ 2872: { double xrow0=(double)row0, xcol0=(double)col0, 2873: xrow1=(double)row1, xcol1=(double)col1; 2874: if ( isline ) xrow0 = xrow1 = (double)(row0+irow); 2875: else if ( isbar ) xcol0 = xcol1 = (double)(col0+irow); 2876: if( xrow0>(-0.001) && xcol0>(-0.001) /*check line inside raster*/ 2877: && xrow1<((double)(height-1)+0.001) && xcol1<((double)(width-1)+0.001) ) 2878: line_recurse(rp,xrow0,xcol0,xrow1,xcol1,thickness); } 2879: return ( 1 ); } 2880: /* --- set params for horizontal line or vertical bar --- */ 2881: if ( isline ) /*interpret row as top row*/ 2882: row1 = row0 + (thickness-1); /* set bottom row for line */ 2883: if ( 0&&isbar ) /*interpret col as left col*/ 2884: hicol = col0 + (thickness-1); /* set right col for bar */ 2885: /* ------------------------------------------------------------------------- 2886: draw line one row at a time 2887: -------------------------------------------------------------------------- */ 2888: for ( irow=min2(row0,row1); irow<=max2(row0,row1); irow++ ) /*each scan line*/ 2889: { 2890: if ( !isbar && !isline ) /* neither vert nor horiz */ 2891: { xcol = col0 + ((double)(irow-row0))/a; /* "middle" col in irow */ 2892: locol = max2((int)(xcol-0.5*(xwidth-1.0)),0); /* leftmost col */ 2893: hicol = min2((int)(xcol+0.5*(xwidth-0.0)),max2(col0,col1)); } /*right*/ 2894: if ( msgfp!=NULL && msglevel>=29 ) /* debugging */ 2895: fprintf(msgfp,"\t irow=%d, xcol=%4.2f, lo,hicol=%d,%d\n", 2896: irow,xcol,locol,hicol); 2897: ipix = irow*rp->width + min2(locol,hicol) - 1; /*first pix preceding icol*/ 2898: for ( icol=min2(locol,hicol); icol<=max2(locol,hicol); icol++ ) /*each pix*/ 2899: if ( ++ipix >= npix ) /* bounds check failed */ 2900: if ( isfatal ) goto end_of_job; /* abort if error is fatal */ 2901: else break; /*or just go on to next row*/ 2902: else /* turn on pixel in line */ 2903: if ( rp->pixsz == 1 ) /* have a pixel bitmap */ 2904: setlongbit(rp->pixmap,ipix); /* so turn on bit in line */ 2905: else /* should have a bytemap */ 2906: if ( rp->pixsz == 8 ) /* check pixsz for bytemap */ 2907: ((unsigned char *)(rp->pixmap))[ipix] = 255; /* set black byte */ 2908: } /* --- end-of-for(irow) --- */ 2909: /* ------------------------------------------------------------------------- 2910: now _redraw_ line one col at a time to avoid "gaps" 2911: -------------------------------------------------------------------------- */ 2912: if ( 1 ) 2913: for ( icol=min2(col0,col1); icol<=max2(col0,col1); icol++ )/*each scan line*/ 2914: { 2915: if ( !isbar && !isline ) /* neither vert nor horiz */ 2916: { xrow = row0 + ((double)(icol-col0))*a; /* "middle" row in icol */ 2917: lorow = max2((int)(xrow-0.5*(xheight-1.0)),0); /* topmost row */ 2918: hirow = min2((int)(xrow+0.5*(xheight-0.0)),max2(row0,row1)); } /*bot*/ 2919: if ( msgfp!=NULL && msglevel>=29 ) /* debugging */ 2920: fprintf(msgfp,"\t icol=%d, xrow=%4.2f, lo,hirow=%d,%d\n", 2921: icol,xrow,lorow,hirow); 2922: ipix = irow*rp->width + min2(locol,hicol) - 1; /*first pix preceding icol*/ 2923: for ( irow=min2(lorow,hirow); irow<=max2(lorow,hirow); irow++ ) /*each pix*/ 2924: if ( irow<0 || irow>=rp->height 2925: || icol<0 || icol>=rp->width ) /* bounds check */ 2926: if ( isfatal ) goto end_of_job; /* abort if error is fatal */ 2927: else continue; /*or just go on to next row*/ 2928: else 2929: setpixel(rp,irow,icol,255); /* set pixel at irow,icol */ 2930: } /* --- end-of-for(irow) --- */ 2931: /* ------------------------------------------------------------------------- 2932: Back to caller with 1=okay, 0=failed. 2933: -------------------------------------------------------------------------- */ 2934: end_of_job: 2935: return ( isfatal? (ipix<npix? 1:0) : 1 ); 2936: } /* --- end-of-function line_raster() --- */ 2937: 2938: 2939: /* ========================================================================== 2940: * Function: line_recurse ( rp, row0, col0, row1, col1, thickness ) 2941: * Purpose: Draw a line from row0,col0 to row1,col1 of thickness 2942: * in existing raster rp. 2943: * -------------------------------------------------------------------------- 2944: * Arguments: rp (I) raster * to raster in which a line 2945: * will be drawn 2946: * row0 (I) double containing row at which 2947: * line will start (0 is topmost) 2948: * col0 (I) double containing col at which 2949: * line will start (0 is leftmost) 2950: * row1 (I) double containing row at which 2951: * line will end (rp->height-1 is bottom-most) 2952: * col1 (I) double containing col at which 2953: * line will end (rp->width-1 is rightmost) 2954: * thickness (I) int containing number of pixels/bits 2955: * thick the line will be 2956: * -------------------------------------------------------------------------- 2957: * Returns: ( int ) 1 if line drawn okay, 2958: * or 0 for any error. 2959: * -------------------------------------------------------------------------- 2960: * Notes: o Recurses, drawing left- and right-halves of line 2961: * until a horizontal or vertical segment is found 2962: * ======================================================================= */ 2963: /* --- entry point --- */ 2964: int line_recurse ( raster *rp, double row0, double col0, 2965: double row1, double col1, int thickness ) 2966: { 2967: /* ------------------------------------------------------------------------- 2968: Allocations and Declarations 2969: -------------------------------------------------------------------------- */ 2970: double delrow = fabs(row1-row0), /* 0 if line horizontal */ 2971: delcol = fabs(col1-col0), /* 0 if line vertical */ 2972: tolerance = 0.5; /* draw line when it goes to point */ 2973: double midrow = 0.5*(row0+row1), /* midpoint row */ 2974: midcol = 0.5*(col0+col1); /* midpoint col */ 2975: /* ------------------------------------------------------------------------- 2976: recurse if either delta > tolerance 2977: -------------------------------------------------------------------------- */ 2978: if ( delrow > tolerance /* row hasn't converged */ 2979: || delcol > tolerance ) /* col hasn't converged */ 2980: { line_recurse(rp,row0,col0,midrow,midcol,thickness); /* left half */ 2981: line_recurse(rp,midrow,midcol,row1,col1,thickness); /* right half */ 2982: return ( 1 ); } 2983: /* ------------------------------------------------------------------------- 2984: draw converged point 2985: -------------------------------------------------------------------------- */ 2986: setpixel(rp,iround(midrow),iround(midcol),255); /*set pixel at midrow,midcol*/ 2987: return ( 1 ); 2988: } /* --- end-of-function line_recurse() --- */ 2989: 2990: 2991: /* ========================================================================== 2992: * Function: circle_raster ( rp, row0, col0, row1, col1, 2993: * thickness, quads ) 2994: * Purpose: Draw quad(rant)s of an ellipse in box determined by 2995: * diagonally opposite corner points (row0,col0) and 2996: * (row1,col1), of thickness pixels in existing raster rp. 2997: * -------------------------------------------------------------------------- 2998: * Arguments: rp (I) raster * to raster in which an ellipse 2999: * will be drawn 3000: * row0 (I) int containing 1st corner row bounding ellipse 3001: * (0 is topmost) 3002: * col0 (I) int containing 1st corner col bounding ellipse 3003: * (0 is leftmost) 3004: * row1 (I) int containing 2nd corner row bounding ellipse 3005: * (rp->height-1 is bottom-most) 3006: * col1 (I) int containing 2nd corner col bounding ellipse 3007: * (rp->width-1 is rightmost) 3008: * thickness (I) int containing number of pixels/bits 3009: * thick the ellipse arc line will be 3010: * quads (I) char * to null-terminated string containing 3011: * any subset/combination of "1234" specifying 3012: * which quadrant(s) of ellipse to draw. 3013: * NULL ptr draws all four quadrants; 3014: * otherwise 1=upper-right quadrant, 3015: * 2=uper-left, 3=lower-left, 4=lower-right, 3016: * i.e., counterclockwise from 1=positive quad. 3017: * -------------------------------------------------------------------------- 3018: * Returns: ( int ) 1 if ellipse drawn okay, 3019: * or 0 for any error. 3020: * -------------------------------------------------------------------------- 3021: * Notes: o row0==row1 or col0==col1 are errors 3022: * o using ellipse equation x^2/a^2 + y^2/b^2 = 1 3023: * ======================================================================= */ 3024: /* --- entry point --- */ 3025: int circle_raster ( raster *rp, int row0, int col0, 3026: int row1, int col1, int thickness, char *quads ) 3027: { 3028: /* ------------------------------------------------------------------------- 3029: Allocations and Declarations 3030: -------------------------------------------------------------------------- */ 3031: /* --- lower-left and upper-right bounding points (in our coords) --- */ 3032: int lorow = min2(row0,row1), /* lower bounding row (top of box) */ 3033: locol = min2(col0,col1), /* lower bounding col (left of box)*/ 3034: hirow = max2(row0,row1), /* upper bounding row (bot of box) */ 3035: hicol = max2(col0,col1); /* upper bounding col (right of box)*/ 3036: /* --- a and b ellipse params --- */ 3037: int width = hicol-locol+1, /* width of bounding box */ 3038: height= hirow-lorow+1, /* height of bounding box */ 3039: islandscape = (width>=height? 1:0); /*true if ellipse lying on side*/ 3040: double a = ((double)width)/2.0, /* x=a when y=0 */ 3041: b = ((double)height)/2.0, /* y=b when x=0 */ 3042: abmajor = (islandscape? a : b), /* max2(a,b) */ 3043: abminor = (islandscape? b : a), /* min2(a,b) */ 3044: abmajor2 = abmajor*abmajor, /* abmajor^2 */ 3045: abminor2 = abminor*abminor; /* abminor^2 */ 3046: /* --- other stuff --- */ 3047: int imajor=0, nmajor=max2(width,height), /*index, #pixels on major axis*/ 3048: iminor=0, nminor=min2(width,height); /* solved index on minor axis */ 3049: int irow, icol, /* raster indexes at circumference */ 3050: rsign=1, csign=1; /* row,col signs, both +1 in quad 1*/ 3051: double midrow= ((double)(row0+row1))/2.0, /* center row */ 3052: midcol= ((double)(col0+col1))/2.0; /* center col */ 3053: double xy, xy2, /* major axis ellipse coord */ 3054: yx2, yx; /* solved minor ellipse coord */ 3055: int isokay = 1; /* true if no pixels out-of-bounds */ 3056: char *qptr=NULL, *allquads="1234"; /* quadrants if input quads==NULL */ 3057: int circle_recurse(), isrecurse=1; /* true to draw ellipse recursively*/ 3058: /* ------------------------------------------------------------------------- 3059: pixel-by-pixel along positive major axis, quit when it goes negative 3060: -------------------------------------------------------------------------- */ 3061: if ( quads == NULL ) quads = allquads; /* draw all quads, or only user's */ 3062: if ( msgfp!=NULL && msglevel>=39 ) /* debugging */ 3063: fprintf(msgfp,"circle_raster> width,height;quads=%d,%d,%s\n", 3064: width,height,quads); 3065: if ( nmajor < 1 ) isokay = 0; /* problem with input args */ 3066: else 3067: { 3068: if ( isrecurse ) /* use recursive algorithm */ 3069: { 3070: for ( qptr=quads; *qptr!='\000'; qptr++ ) /* for each character in quads */ 3071: { 3072: double theta0=0.0, theta1=0.0; /* set thetas based on quadrant */ 3073: switch ( *qptr ) /* check for quadrant 1,2,3,4 */ 3074: { default: /* unrecognized, assume quadrant 1 */ 3075: case '1': theta0= 0.0; theta1= 90.0; break; /* first quadrant */ 3076: case '2': theta0= 90.0; theta1=180.0; break; /* second quadrant */ 3077: case '3': theta0=180.0; theta1=270.0; break; /* third quadrant */ 3078: case '4': theta0=270.0; theta1=360.0; break; } /* fourth quadrant */ 3079: circle_recurse(rp,row0,col0,row1,col1,thickness,theta0,theta1); 3080: } /* --- end-of-for(qptr) --- */ 3081: return ( 1 ); 3082: } /* --- end-of-if(isrecurse) --- */ 3083: for ( imajor=(nmajor+1)/2; ; imajor-- ) 3084: { 3085: /* --- xy is coord along major axis, yx is "solved" along minor axis --- */ 3086: xy = ((double)imajor); /* xy = abmajor ... 0 */ 3087: if ( xy < 0.0 ) break; /* negative side symmetrical */ 3088: yx2 = abminor2*(1.0 - xy*xy/abmajor2); /* "solve" ellipse equation */ 3089: yx = (yx2>0.0? sqrt(yx2) : 0.0); /* take sqrt if possible */ 3090: iminor = iround(yx); /* nearest integer */ 3091: /* --- set pixels for each requested quadrant --- */ 3092: for ( qptr=quads; *qptr!='\000'; qptr++ ) /* for each character in quads */ 3093: { 3094: rsign = (-1); csign = 1; /* init row,col in user quadrant 1 */ 3095: switch ( *qptr ) /* check for quadrant 1,2,3,4 */ 3096: { default: break; /* unrecognized, assume quadrant 1 */ 3097: case '4': rsign = 1; break; /* row,col both pos in quadrant 4 */ 3098: case '3': rsign = 1; /* row pos, col neg in quadrant 3 */ 3099: case '2': csign = (-1); break; } /* row,col both neg in quadrant 2 */ 3100: irow = iround(midrow + (double)rsign*(islandscape?yx:xy)); 3101: irow = min2(hirow,max2(lorow,irow)); /* keep irow in bounds */ 3102: icol = iround(midcol + (double)csign*(islandscape?xy:yx)); 3103: icol = min2(hicol,max2(locol,icol)); /* keep icol in bounds */ 3104: if ( msgfp!=NULL && msglevel>=49 ) /* debugging */ 3105: fprintf(msgfp,"\t...imajor=%d; iminor,quad,irow,icol=%d,%c,%d,%d\n", 3106: imajor,iminor,*qptr,irow,icol); 3107: if ( irow<0 || irow>=rp->height /* row outside raster */ 3108: || icol<0 || icol>=rp->width ) /* col outside raster */ 3109: { isokay = 0; /* signal out-of-bounds pixel */ 3110: continue; } /* but still try remaining points */ 3111: setpixel(rp,irow,icol,255); /* set pixel at irow,icol */ 3112: } /* --- end-of-for(qptr) --- */ 3113: } /* --- end-of-for(imajor) --- */ 3114: /* ------------------------------------------------------------------------ 3115: now do it _again_ along minor axis to avoid "gaps" 3116: ------------------------------------------------------------------------- */ 3117: if ( 1 && iminor>0 ) 3118: for ( iminor=(nminor+1)/2; ; iminor-- ) 3119: { 3120: /* --- yx is coord along minor axis, xy is "solved" along major axis --- */ 3121: yx = ((double)iminor); /* yx = abminor ... 0 */ 3122: if ( yx < 0.0 ) break; /* negative side symmetrical */ 3123: xy2 = abmajor2*(1.0 - yx*yx/abminor2); /* "solve" ellipse equation */ 3124: xy = (xy2>0.0? sqrt(xy2) : 0.0); /* take sqrt if possible */ 3125: imajor = iround(xy); /* nearest integer */ 3126: /* --- set pixels for each requested quadrant --- */ 3127: for ( qptr=quads; *qptr!='\000'; qptr++ ) /* for each character in quads */ 3128: { 3129: rsign = (-1); csign = 1; /* init row,col in user quadrant 1 */ 3130: switch ( *qptr ) /* check for quadrant 1,2,3,4 */ 3131: { default: break; /* unrecognized, assume quadrant 1 */ 3132: case '4': rsign = 1; break; /* row,col both pos in quadrant 4 */ 3133: case '3': rsign = 1; /* row pos, col neg in quadrant 3 */ 3134: case '2': csign = (-1); break; } /* row,col both neg in quadrant 2 */ 3135: irow = iround(midrow + (double)rsign*(islandscape?yx:xy)); 3136: irow = min2(hirow,max2(lorow,irow)); /* keep irow in bounds */ 3137: icol = iround(midcol + (double)csign*(islandscape?xy:yx)); 3138: icol = min2(hicol,max2(locol,icol)); /* keep icol in bounds */ 3139: if ( msgfp!=NULL && msglevel>=49 ) /* debugging */ 3140: fprintf(msgfp,"\t...iminor=%d; imajor,quad,irow,icol=%d,%c,%d,%d\n", 3141: iminor,imajor,*qptr,irow,icol); 3142: if ( irow<0 || irow>=rp->height /* row outside raster */ 3143: || icol<0 || icol>=rp->width ) /* col outside raster */ 3144: { isokay = 0; /* signal out-of-bounds pixel */ 3145: continue; } /* but still try remaining points */ 3146: setpixel(rp,irow,icol,255); /* set pixel at irow,icol */ 3147: } /* --- end-of-for(qptr) --- */ 3148: } /* --- end-of-for(iminor) --- */ 3149: } /* --- end-of-if/else(nmajor<1) --- */ 3150: return ( isokay ); 3151: } /* --- end-of-function circle_raster() --- */ 3152: 3153: 3154: /* ========================================================================== 3155: * Function: circle_recurse ( rp, row0, col0, row1, col1, 3156: * thickness, theta0, theta1 ) 3157: * Purpose: Recursively draws arc theta0<=theta<=theta1 of the ellipse 3158: * in box determined by diagonally opposite corner points 3159: * (row0,col0) and (row1,col1), of thickness pixels in raster rp. 3160: * -------------------------------------------------------------------------- 3161: * Arguments: rp (I) raster * to raster in which an ellipse 3162: * will be drawn 3163: * row0 (I) int containing 1st corner row bounding ellipse 3164: * (0 is topmost) 3165: * col0 (I) int containing 1st corner col bounding ellipse 3166: * (0 is leftmost) 3167: * row1 (I) int containing 2nd corner row bounding ellipse 3168: * (rp->height-1 is bottom-most) 3169: * col1 (I) int containing 2nd corner col bounding ellipse 3170: * (rp->width-1 is rightmost) 3171: * thickness (I) int containing number of pixels/bits 3172: * thick the ellipse arc line will be 3173: * theta0 (I) double containing first angle -360 -> +360 3174: * theta1 (I) double containing second angle -360 -> +360 3175: * 0=x-axis, positive moving counterclockwise 3176: * -------------------------------------------------------------------------- 3177: * Returns: ( int ) 1 if ellipse drawn okay, 3178: * or 0 for any error. 3179: * -------------------------------------------------------------------------- 3180: * Notes: o row0==row1 or col0==col1 are errors 3181: * o using ellipse equation x^2/a^2 + y^2/b^2 = 1 3182: * Then, with x=r*cos(theta), y=r*sin(theta), ellipse 3183: * equation is r = ab/sqrt(a^2*sin^2(theta)+b^2*cos^2(theta)) 3184: * ======================================================================= */ 3185: /* --- entry point --- */ 3186: int circle_recurse ( raster *rp, int row0, int col0, 3187: int row1, int col1, int thickness, double theta0, double theta1 ) 3188: { 3189: /* ------------------------------------------------------------------------- 3190: Allocations and Declarations 3191: -------------------------------------------------------------------------- */ 3192: /* --- lower-left and upper-right bounding points (in our coords) --- */ 3193: int lorow = min2(row0,row1), /* lower bounding row (top of box) */ 3194: locol = min2(col0,col1), /* lower bounding col (left of box)*/ 3195: hirow = max2(row0,row1), /* upper bounding row (bot of box) */ 3196: hicol = max2(col0,col1); /* upper bounding col (right of box)*/ 3197: /* --- a and b ellipse params --- */ 3198: int width = hicol-locol+1, /* width of bounding box */ 3199: height= hirow-lorow+1; /* height of bounding box */ 3200: double a = ((double)width)/2.0, /* col x=a when row y=0 */ 3201: b = ((double)height)/2.0, /* row y=b when col x=0 */ 3202: ab=a*b, a2=a*a, b2=b*b; /* product and squares */ 3203: /* --- arc parameters --- */ 3204: double rads = 0.017453292, /* radians per degree = 1/57.29578 */ 3205: lotheta = rads*dmod(min2(theta0,theta1),360), /* smaller angle */ 3206: hitheta = rads*dmod(max2(theta0,theta1),360), /* larger angle */ 3207: locos=cos(lotheta), losin=sin(lotheta), /* trigs for lotheta */ 3208: hicos=cos(hitheta), hisin=sin(hitheta), /* trigs for hitheta */ 3209: rlo = ab/sqrt(b2*locos*locos+a2*losin*losin), /* r for lotheta */ 3210: rhi = ab/sqrt(b2*hicos*hicos+a2*hisin*hisin), /* r for hitheta */ 3211: xlo=rlo*locos, ylo=rlo*losin, /*col,row pixel coords for lotheta*/ 3212: xhi=rhi*hicos, yhi=rhi*hisin, /*col,row pixel coords for hitheta*/ 3213: xdelta=fabs(xhi-xlo), ydelta=fabs(yhi-ylo), /* col,row deltas */ 3214: tolerance = 0.5; /* convergence tolerance */ 3215: /* ------------------------------------------------------------------------- 3216: recurse if either delta > tolerance 3217: -------------------------------------------------------------------------- */ 3218: if ( ydelta > tolerance /* row hasn't converged */ 3219: || xdelta > tolerance ) /* col hasn't converged */ 3220: { double midtheta = 0.5*(theta0+theta1); /* mid angle for arc */ 3221: circle_recurse(rp,row0,col0,row1,col1,thickness,theta0,midtheta); /*lo*/ 3222: circle_recurse(rp,row0,col0,row1,col1,thickness,midtheta,theta1); }/*hi*/ 3223: /* ------------------------------------------------------------------------- 3224: draw converged point 3225: -------------------------------------------------------------------------- */ 3226: else 3227: { double xcol=0.5*(xlo+xhi), yrow=0.5*(ylo+yhi), /* relative to center*/ 3228: centerrow = 0.5*((double)(lorow+hirow)), /* ellipse y-center */ 3229: centercol = 0.5*((double)(locol+hicol)), /* ellipse x-center */ 3230: midrow=centerrow-yrow, midcol=centercol+xcol; /* pixel coords */ 3231: setpixel(rp,iround(midrow),iround(midcol),255); } /* set midrow,midcol */ 3232: return ( 1 ); 3233: } /* --- end-of-function circle_recurse() --- */ 3234: 3235: 3236: /* ========================================================================== 3237: * Function: bezier_raster ( rp, r0,c0, r1,c1, rt,ct ) 3238: * Purpose: Recursively draw bezier from r0,c0 to r1,c1 3239: * (with tangent point rt,ct) in existing raster rp. 3240: * -------------------------------------------------------------------------- 3241: * Arguments: rp (I) raster * to raster in which a line 3242: * will be drawn 3243: * r0 (I) double containing row at which 3244: * bezier will start (0 is topmost) 3245: * c0 (I) double containing col at which 3246: * bezier will start (0 is leftmost) 3247: * r1 (I) double containing row at which 3248: * bezier will end (rp->height-1 is bottom-most) 3249: * c1 (I) double containing col at which 3250: * bezier will end (rp->width-1 is rightmost) 3251: * rt (I) double containing row for tangent point 3252: * ct (I) double containing col for tangent point 3253: * -------------------------------------------------------------------------- 3254: * Returns: ( int ) 1 if line drawn okay, 3255: * or 0 for any error. 3256: * -------------------------------------------------------------------------- 3257: * Notes: o Recurses, drawing left- and right-halves of bezier curve 3258: * until a point is found 3259: * ======================================================================= */ 3260: /* --- entry point --- */ 3261: int bezier_raster ( raster *rp, double r0, double c0, 3262: double r1, double c1, double rt, double ct ) 3263: { 3264: /* ------------------------------------------------------------------------- 3265: Allocations and Declarations 3266: -------------------------------------------------------------------------- */ 3267: double delrow = fabs(r1-r0), /* 0 if same row */ 3268: delcol = fabs(c1-c0), /* 0 if same col */ 3269: tolerance = 0.5; /* draw curve when it goes to point*/ 3270: double midrow = 0.5*(r0+r1), /* midpoint row */ 3271: midcol = 0.5*(c0+c1); /* midpoint col */ 3272: int irow=0, icol=0; /* point to be drawn */ 3273: int status = 1; /* return status */ 3274: /* ------------------------------------------------------------------------- 3275: recurse if either delta > tolerance 3276: -------------------------------------------------------------------------- */ 3277: if ( delrow > tolerance /* row hasn't converged */ 3278: || delcol > tolerance ) /* col hasn't converged */ 3279: { bezier_raster(rp, r0,c0, /* left half */ 3280: 0.5*(rt+midrow), 0.5*(ct+midcol), 3281: 0.5*(r0+rt), 0.5*(c0+ct) ); 3282: bezier_raster(rp, 0.5*(rt+midrow), 0.5*(ct+midcol), /* right half */ 3283: r1,c1, 3284: 0.5*(r1+rt), 0.5*(c1+ct) ); 3285: return ( 1 ); } 3286: /* ------------------------------------------------------------------------- 3287: draw converged point 3288: -------------------------------------------------------------------------- */ 3289: /* --- get integer point --- */ 3290: irow = iround(midrow); /* row pixel coord */ 3291: icol = iround(midcol); /* col pixel coord */ 3292: /* --- bounds check --- */ 3293: if ( irow>=0 && irow<rp->height /* row in bounds */ 3294: && icol>=0 && icol<rp->width ) /* col in bounds */ 3295: setpixel(rp,irow,icol,255); /* so set pixel at irow,icol*/ 3296: else status = 0; /* bad status if out-of-bounds */ 3297: return ( status ); 3298: } /* --- end-of-function bezier_raster() --- */ 3299: 3300: 3301: /* ========================================================================== 3302: * Function: border_raster ( rp, ntop, nbot, isline, isfree ) 3303: * Purpose: Allocate a new raster containing a copy of input rp, 3304: * along with ntop extra rows at top and nbot at bottom, 3305: * and whose width is either adjusted correspondingly, 3306: * or is automatically enlarged to a multiple of 8 3307: * with original bitmap centered 3308: * -------------------------------------------------------------------------- 3309: * Arguments: rp (I) raster * to raster on which a border 3310: * is to be placed 3311: * ntop (I) int containing number extra rows at top. 3312: * if negative, abs(ntop) used, and same 3313: * number of extra cols added at left. 3314: * nbot (I) int containing number extra rows at bottom. 3315: * if negative, abs(nbot) used, and same 3316: * number of extra cols added at right. 3317: * isline (I) int containing 0 to leave border pixels clear 3318: * or >0 to draw a line around border of 3319: * thickness isline pixels. See Notes below. 3320: * isfree (I) int containing true to free rp before return 3321: * -------------------------------------------------------------------------- 3322: * Returns: ( raster * ) ptr to bordered raster, 3323: * or NULL for any error. 3324: * -------------------------------------------------------------------------- 3325: * Notes: o The isline arg also controls which sides border lines 3326: * are drawn for. To do this, isline is interpreted as 3327: * thickness + 100*sides so that, e.g., passing isline=601 3328: * is interpreted as sides=6 and thickness=1. And 3329: * sides is further interpreted as 1=left side, 2=top, 3330: * 4=right and 8=bottom. For example, sides=6 where 6=2+4 3331: * draws the top and right borders only. 15 draws all four 3332: * sides. And 0 (no sides value embedded in isline) 3333: * draws all four sides, too. 3334: * ======================================================================= */ 3335: /* --- entry point --- */ 3336: raster *border_raster ( raster *rp, int ntop, int nbot, 3337: int isline, int isfree ) 3338: { 3339: /* ------------------------------------------------------------------------- 3340: Allocations and Declarations 3341: -------------------------------------------------------------------------- */ 3342: raster *new_raster(), *bp=(raster *)NULL; /*raster back to caller*/ 3343: int rastput(); /* overlay rp in new bordered raster */ 3344: int width = (rp==NULL?0:rp->width), /* width of raster */ 3345: height = (rp==NULL?0:rp->height), /* height of raster */ 3346: istopneg=0, isbotneg=0, /* true if ntop or nbot negative */ 3347: leftmargin = 0; /* adjust width to whole number of bytes */ 3348: int left=1, top=1, right=1, bot=1; /* frame sides to draw */ 3349: int delete_raster(); /* free input rp if isfree is true */ 3350: /* ------------------------------------------------------------------------- 3351: Initialization 3352: -------------------------------------------------------------------------- */ 3353: if ( rp == NULL ) goto end_of_job; /* no input raster provided */ 3354: if ( isstring || (1 && rp->height==1) ) /* explicit string signal or infer */ 3355: { bp=rp; goto end_of_job; } /* return ascii string unchanged */ 3356: /* --- check for negative args --- */ 3357: if ( ntop < 0 ) { ntop = -ntop; istopneg=1; } /*flip positive and set flag*/ 3358: if ( nbot < 0 ) { nbot = -nbot; isbotneg=1; } /*flip positive and set flag*/ 3359: /* --- adjust height for ntop and nbot margins --- */ 3360: height += (ntop+nbot); /* adjust height for margins */ 3361: /* --- adjust width for left and right margins --- */ 3362: if ( istopneg || isbotneg ) /*caller wants nleft=ntop and/or nright=nbot*/ 3363: { /* --- adjust width (and leftmargin) as requested by caller -- */ 3364: if ( istopneg ) { width += ntop; leftmargin = ntop; } 3365: if ( isbotneg ) width += nbot; } 3366: else 3367: { /* --- or adjust width (and leftmargin) to whole number of bytes --- */ 3368: leftmargin = (width%8==0? 0 : 8-(width%8)); /*makes width multiple of 8*/ 3369: width += leftmargin; /* width now multiple of 8 */ 3370: leftmargin /= 2; } /* center original raster */ 3371: /* --- check which sides to draw --- */ 3372: if ( isline > 100 ) { /* sides arg embedded in isline */ 3373: int iside=0, sides=isline/100; /* index, sides=1-15 from 101-1599 */ 3374: isline -= 100*sides; /* and remove sides from isline */ 3375: for ( iside=1; iside<=4; iside++ ) { /* check left, top, right, bot */ 3376: int shift = sides/2; /* shift sides left one bit */ 3377: if ( sides == 2*shift ) /* low-order bit is >>not<< set */ 3378: switch ( iside ) { /* don't draw corresponding side */ 3379: default: break; /* internal error */ 3380: case 1: left = 0; break; /* 1 = left side */ 3381: case 2: top = 0; break; /* 2 = top side */ 3382: case 3: right= 0; break; /* 4 = tight side */ 3383: case 4: bot = 0; break; } /* 8 = bottom side */ 3384: sides = shift; /* ready for next side */ 3385: } /* --- end-of-for(iside) --- */ 3386: } /* --- end-of-if(isline>100) --- */ 3387: /* ------------------------------------------------------------------------- 3388: allocate bordered raster, and embed rp within it 3389: -------------------------------------------------------------------------- */ 3390: /* --- allocate bordered raster --- */ 3391: if ( (bp=new_raster(width,height,rp->pixsz)) /*allocate bordered raster*/ 3392: == (raster *)NULL ) goto end_of_job; /* and quit if failed */ 3393: /* --- embed rp in it --- */ 3394: rastput(bp,rp,ntop,leftmargin,1); /* rp embedded in bp */ 3395: /* ------------------------------------------------------------------------- 3396: draw border if requested 3397: -------------------------------------------------------------------------- */ 3398: if ( isline ) 3399: { int irow, icol, nthick=isline; /*height,width index, line thickness*/ 3400: /* --- draw left- and right-borders --- */ 3401: for ( irow=0; irow<height; irow++ ) /* for each row of bp */ 3402: for ( icol=0; icol<nthick; icol++ ) /* and each pixel of thickness */ 3403: { if(left){setpixel(bp,irow,icol,255);} /* left border */ 3404: if(right){setpixel(bp,irow,width-1-icol,255);} } /* right border */ 3405: /* --- draw top- and bottom-borders --- */ 3406: for ( icol=0; icol<width; icol++ ) /* for each col of bp */ 3407: for ( irow=0; irow<nthick; irow++ ) /* and each pixel of thickness */ 3408: { if(top){setpixel(bp,irow,icol,255);} /* top border */ 3409: if(bot){setpixel(bp,height-1-irow,icol,255);} } /* bottom border */ 3410: } /* --- end-of-if(isline) --- */ 3411: /* ------------------------------------------------------------------------- 3412: free rp if no longer needed 3413: -------------------------------------------------------------------------- */ 3414: if ( isfree ) /*caller no longer needs rp*/ 3415: delete_raster(rp); /* so free it for him */ 3416: /* ------------------------------------------------------------------------- 3417: Back to caller with bordered raster (or null for any error) 3418: -------------------------------------------------------------------------- */ 3419: end_of_job: 3420: return ( bp ); /* back with bordered or null ptr */ 3421: } /* --- end-of-function border_raster() --- */ 3422: 3423: 3424: /* ========================================================================== 3425: * Function: backspace_raster ( rp, nback, pback, minspace, isfree ) 3426: * Purpose: Allocate a new raster containing a copy of input rp, 3427: * but with trailing nback columns removed. 3428: * If minspace>=0 then (at least) that many columns 3429: * of whitespace will be left in place, regardless of nback. 3430: * If minspace<0 then existing black pixels will be deleted 3431: * as required. 3432: * -------------------------------------------------------------------------- 3433: * Arguments: rp (I) raster * to raster on which a border 3434: * is to be placed 3435: * nback (I) int containing number of columns to 3436: * backspace (>=0) 3437: * pback (O) ptr to int returning #pixels actually 3438: * backspaced (or NULL to not use) 3439: * minspace (I) int containing number of columns 3440: * of whitespace to be left in place 3441: * isfree (I) int containing true to free rp before return 3442: * -------------------------------------------------------------------------- 3443: * Returns: ( raster * ) ptr to backspaced raster, 3444: * or NULL for any error. 3445: * -------------------------------------------------------------------------- 3446: * Notes: o For \! negative space, for \hspace{-10}, etc. 3447: * ======================================================================= */ 3448: /* --- entry point --- */ 3449: raster *backspace_raster ( raster *rp, int nback, int *pback, int minspace, 3450: int isfree ) 3451: { 3452: /* ------------------------------------------------------------------------- 3453: Allocations and Declarations 3454: -------------------------------------------------------------------------- */ 3455: raster *new_raster(), *bp=(raster *)NULL; /* raster returned to caller */ 3456: int delete_raster(); /* free input rp if isfree is true */ 3457: int width = (rp==NULL?0:rp->width), /* original width of raster */ 3458: height = (rp==NULL?0:rp->height), /* height of raster */ 3459: mback = nback, /* nback adjusted for minspace */ 3460: newwidth = width, /* adjusted width after backspace */ 3461: icol=0, irow=0; /* col,row index */ 3462: if ( rp == NULL ) goto end_of_job; /* no input given */ 3463: /* ------------------------------------------------------------------------- 3464: locate rightmost column of rp containing ink, and determine backspaced width 3465: -------------------------------------------------------------------------- */ 3466: /* --- locate rightmost column of rp containing ink --- */ 3467: if ( minspace >= 0 ) /* only needed if given minspace */ 3468: for ( icol=width-1; icol>=0; icol-- ) /* find first non-empty col in row */ 3469: for ( irow=0; irow<height; irow++ ) /* for each row inside rp */ 3470: if ( getpixel(rp,irow,icol) != 0 ) { /* found a set pixel */ 3471: int whitecols = (width-1) - icol; /* #cols containing white space */ 3472: mback = min2(nback,max2(0,whitecols-minspace)); /*leave minspace cols*/ 3473: goto gotright; } /* no need to look further */ 3474: /* --- determine width of new backspaced raster --- */ 3475: gotright: /* found col with ink (or rp empty)*/ 3476: if ( mback > width ) mback = width; /* can't backspace before beginning*/ 3477: newwidth = max2(1,width-mback); /* #cols in backspaced raster */ 3478: if ( pback != NULL ) *pback = width-newwidth; /* caller wants #pixels */ 3479: /* ------------------------------------------------------------------------- 3480: allocate new raster and fill it with leftmost cols of rp 3481: -------------------------------------------------------------------------- */ 3482: /* --- allocate backspaced raster --- */ 3483: if ( (bp=new_raster(newwidth,height,rp->pixsz)) /*allocate backspaced raster*/ 3484: == (raster *)NULL ) goto end_of_job; /* and quit if failed */ 3485: /* --- fill new raster --- */ 3486: if ( 1 || width-nback > 0 ) /* don't fill 1-pixel wide empty bp*/ 3487: for ( icol=0; icol<newwidth; icol++ ) /* find first non-empty col in row */ 3488: for ( irow=0; irow<height; irow++ ) /* for each row inside rp */ 3489: { int value = getpixel(rp,irow,icol); /* original pixel at irow,icol */ 3490: setpixel(bp,irow,icol,value); } /* saved in backspaced raster */ 3491: /* ------------------------------------------------------------------------- 3492: Back to caller with backspaced raster (or null for any error) 3493: -------------------------------------------------------------------------- */ 3494: end_of_job: 3495: if ( msgfp!=NULL && msglevel>=999 ) { fprintf(msgfp, /* diagnostics */ 3496: "backspace_raster> nback=%d,minspace=%d,mback=%d, width:old=%d,new=%d\n", 3497: nback,minspace,mback,width,newwidth); fflush(msgfp); } 3498: if ( isfree && bp!=NULL ) delete_raster(rp); /* free original raster */ 3499: return ( bp ); /* back with backspaced or null ptr*/ 3500: } /* --- end-of-function backspace_raster() --- */ 3501: 3502: 3503: /* ========================================================================== 3504: * Function: type_raster ( rp, fp ) 3505: * Purpose: Emit an ascii dump representing rp, on fp. 3506: * -------------------------------------------------------------------------- 3507: * Arguments: rp (I) ptr to raster struct for which an 3508: * ascii dump is to be constructed. 3509: * fp (I) File ptr to output device (defaults to 3510: * stdout if passed as NULL). 3511: * -------------------------------------------------------------------------- 3512: * Returns: ( int ) 1 if completed successfully, 3513: * or 0 otherwise (for any error). 3514: * -------------------------------------------------------------------------- 3515: * Notes: 3516: * ======================================================================= */ 3517: /* --- entry point --- */ 3518: int type_raster ( raster *rp, FILE *fp ) 3519: { 3520: /* ------------------------------------------------------------------------- 3521: Allocations and Declarations 3522: -------------------------------------------------------------------------- */ 3523: static int display_width = 72; /* max columns for display */ 3524: static char display_chars[16] = /* display chars for bytemap */ 3525: { ' ','1','2','3','4','5','6','7','8','9','A','B','C','D','E','*' }; 3526: char scanline[133]; /* ascii image for one scan line */ 3527: int scan_width; /* #chars in scan (<=display_width)*/ 3528: int irow, locol,hicol=(-1); /* height index, width indexes */ 3529: raster *gftobitmap(), *bitmaprp=rp; /* convert .gf to bitmap if needed */ 3530: int delete_raster(); /*free bitmap converted for display*/ 3531: /* -------------------------------------------------------------------------- 3532: initialization 3533: -------------------------------------------------------------------------- */ 3534: /* --- redirect null fp --- */ 3535: if ( fp == (FILE *)NULL ) fp = stdout; /* default fp to stdout if null */ 3536: if ( msglevel >= 999 ) { fprintf(fp, /* debugging diagnostics */ 3537: "type_raster> width=%d height=%d ...\n", 3538: rp->width,rp->height); fflush(fp); } 3539: /* --- check for ascii string --- */ 3540: if ( isstring /* pixmap has string, not raster */ 3541: || (0 && rp->height==1) ) /* infer input rp is a string */ 3542: { 3543: char *string = (char *)(rp->pixmap); /*interpret pixmap as ascii string*/ 3544: int width = strlen(string); /* #chars in ascii string */ 3545: while ( width > display_width-2 ) /* too big for one line */ 3546: { fprintf(fp,"\"%.*s\"\n",display_width-2,string); /*display leading chars*/ 3547: string += (display_width-2); /* bump string past displayed chars*/ 3548: width -= (display_width-2); } /* decrement remaining width */ 3549: fprintf(fp,"\"%.*s\"\n",width,string); /* display trailing chars */ 3550: return ( 1 ); 3551: } /* --- end-of-if(isstring) --- */ 3552: /* -------------------------------------------------------------------------- 3553: display ascii dump of bitmap image (in segments if display_width < rp->width) 3554: -------------------------------------------------------------------------- */ 3555: if ( rp->format == 2 /* input is .gf-formatted */ 3556: || rp->format == 3 ) 3557: bitmaprp = gftobitmap(rp); /* so convert it for display */ 3558: if ( bitmaprp != NULL ) /* if we have image for display */ 3559: while ( (locol=hicol+1) < rp->width ) /*start where prev segment left off*/ 3560: { 3561: /* --- set hicol for this pass (locol set above) --- */ 3562: hicol += display_width; /* show as much as display allows */ 3563: if (hicol >= rp->width) hicol = rp->width - 1; /*but not more than raster*/ 3564: scan_width = hicol-locol+1; /* #chars in this scan */ 3565: if ( locol > 0 ) fprintf(fp,"----------\n"); /*separator between segments*/ 3566: /* ------------------------------------------------------------------------ 3567: display all scan lines for this local...hicol segment range 3568: ------------------------------------------------------------------------ */ 3569: for ( irow=0; irow<rp->height; irow++ ) /* all scan lines for col range */ 3570: { 3571: /* --- allocations and declarations --- */ 3572: int ipix, /* pixmap[] index for this scan */ 3573: lopix = irow*rp->width + locol; /*first pixmap[] pixel in this scan*/ 3574: /* --- set chars in scanline[] based on pixels in rp->pixmap[] --- */ 3575: for ( ipix=0; ipix<scan_width; ipix++ ) /* set each char */ 3576: if ( bitmaprp->pixsz == 1 ) /*' '=0 or '*'=1 to display bitmap*/ 3577: scanline[ipix]=(getlongbit(bitmaprp->pixmap,lopix+ipix)==1? '*':'.'); 3578: else /* should have a bytemap */ 3579: if ( bitmaprp->pixsz == 8 ) /* double-check pixsz for bytemap */ 3580: { int pixval = (int)((bitmaprp->pixmap)[lopix+ipix]), /*byte value*/ 3581: ichar = min2(15,pixval/16); /* index for ' ', '1'...'e', '*' */ 3582: scanline[ipix] = display_chars[ichar]; } /*set ' ' for 0-15, etc*/ 3583: /* --- display completed scan line --- */ 3584: fprintf(fp,"%.*s\n",scan_width,scanline); 3585: } /* --- end-of-for(irow) --- */ 3586: } /* --- end-of-while(hicol<rp->width) --- */ 3587: /* ------------------------------------------------------------------------- 3588: Back to caller with 1=okay, 0=failed. 3589: -------------------------------------------------------------------------- */ 3590: if ( rp->format == 2 /* input was .gf-format */ 3591: || rp->format == 3 ) 3592: if ( bitmaprp != NULL ) /* and we converted it for display */ 3593: delete_raster(bitmaprp); /* no longer needed, so free it */ 3594: return ( 1 ); 3595: } /* --- end-of-function type_raster() --- */ 3596: 3597: 3598: /* ========================================================================== 3599: * Function: type_bytemap ( bp, grayscale, width, height, fp ) 3600: * Purpose: Emit an ascii dump representing bp, on fp. 3601: * -------------------------------------------------------------------------- 3602: * Arguments: bp (I) intbyte * to bytemap for which an 3603: * ascii dump is to be constructed. 3604: * grayscale (I) int containing #gray shades, 256 for 8-bit 3605: * width (I) int containing #cols in bytemap 3606: * height (I) int containing #rows in bytemap 3607: * fp (I) File ptr to output device (defaults to 3608: * stdout if passed as NULL). 3609: * -------------------------------------------------------------------------- 3610: * Returns: ( int ) 1 if completed successfully, 3611: * or 0 otherwise (for any error). 3612: * -------------------------------------------------------------------------- 3613: * Notes: 3614: * ======================================================================= */ 3615: /* --- entry point --- */ 3616: int type_bytemap ( intbyte *bp, int grayscale, 3617: int width, int height, FILE *fp ) 3618: { 3619: /* ------------------------------------------------------------------------- 3620: Allocations and Declarations 3621: -------------------------------------------------------------------------- */ 3622: static int display_width = 72; /* max columns for display */ 3623: int byte_width = 3, /* cols to display byte (ff+space) */ 3624: maxbyte = 0; /* if maxbyte<16, set byte_width=2 */ 3625: int white_byte = 0, /* show dots for white_byte's */ 3626: black_byte = grayscale-1; /* show stars for black_byte's */ 3627: char scanline[133]; /* ascii image for one scan line */ 3628: int scan_width, /* #chars in scan (<=display_width)*/ 3629: scan_cols; /* #cols in scan (hicol-locol+1) */ 3630: int ibyte, /* bp[] index */ 3631: irow, locol,hicol=(-1); /* height index, width indexes */ 3632: /* -------------------------------------------------------------------------- 3633: initialization 3634: -------------------------------------------------------------------------- */ 3635: /* --- redirect null fp --- */ 3636: if ( fp == (FILE *)NULL ) fp = stdout; /* default fp to stdout if null */ 3637: /* --- check for ascii string --- */ 3638: if ( isstring ) /* bp has ascii string, not raster */ 3639: { width = strlen((char *)bp); /* #chars in ascii string */ 3640: height = 1; } /* default */ 3641: /* --- see if we can get away with byte_width=1 --- */ 3642: for ( ibyte=0; ibyte<width*height; ibyte++ ) /* check all bytes */ 3643: { int byteval = (int)bp[ibyte]; /* current byte value */ 3644: if ( byteval < black_byte ) /* if it's less than black_byte */ 3645: maxbyte = max2(maxbyte,byteval); } /* then find max non-black value */ 3646: if ( maxbyte < 16 ) /* bytevals will fit in one column */ 3647: byte_width = 1; /* so reset display byte_width */ 3648: /* -------------------------------------------------------------------------- 3649: display ascii dump of bitmap image (in segments if display_width < rp->width) 3650: -------------------------------------------------------------------------- */ 3651: while ( (locol=hicol+1) < width ) /*start where prev segment left off*/ 3652: { 3653: /* --- set hicol for this pass (locol set above) --- */ 3654: hicol += display_width/byte_width; /* show as much as display allows */ 3655: if (hicol >= width) hicol = width - 1; /* but not more than bytemap */ 3656: scan_cols = hicol-locol+1; /* #cols in this scan */ 3657: scan_width = byte_width*scan_cols; /* #chars in this scan */ 3658: if ( locol>0 && !isstring ) fprintf(fp,"----------\n"); /* separator */ 3659: /* ------------------------------------------------------------------------ 3660: display all scan lines for this local...hicol segment range 3661: ------------------------------------------------------------------------ */ 3662: for ( irow=0; irow<height; irow++ ) /* all scan lines for col range */ 3663: { 3664: /* --- allocations and declarations --- */ 3665: int lobyte = irow*width + locol; /* first bp[] byte in this scan */ 3666: char scanbyte[32]; /* sprintf() buffer for byte */ 3667: /* --- set chars in scanline[] based on bytes in bytemap bp[] --- */ 3668: memset(scanline,' ',scan_width); /* blank out scanline */ 3669: for ( ibyte=0; ibyte<scan_cols; ibyte++ ) /* set chars for each col */ 3670: { int byteval = (int)bp[lobyte+ibyte]; /* value of current byte */ 3671: memset(scanbyte,'.',byte_width); /* dot-fill scanbyte */ 3672: if ( byteval == black_byte ) /* but if we have a black byte */ 3673: memset(scanbyte,'*',byte_width); /* star-fill scanbyte instead */ 3674: if ( byte_width > 1 ) /* don't blank out single char */ 3675: scanbyte[byte_width-1] = ' '; /* blank-fill rightmost character */ 3676: if ( byteval != white_byte /* format bytes that are non-white */ 3677: && byteval != black_byte ) /* and that are non-black */ 3678: sprintf(scanbyte,"%*x ",max2(1,byte_width-1),byteval); /*hex-format*/ 3679: memcpy(scanline+ibyte*byte_width,scanbyte,byte_width); } /*in line*/ 3680: /* --- display completed scan line --- */ 3681: fprintf(fp,"%.*s\n",scan_width,scanline); 3682: } /* --- end-of-for(irow) --- */ 3683: } /* --- end-of-while(hicol<width) --- */ 3684: /* ------------------------------------------------------------------------- 3685: Back to caller with 1=okay, 0=failed. 3686: -------------------------------------------------------------------------- */ 3687: return ( 1 ); 3688: } /* --- end-of-function type_bytemap() --- */ 3689: 3690: 3691: /* ========================================================================== 3692: * Function: xbitmap_raster ( rp, fp ) 3693: * Purpose: Emit a mime xbitmap representing rp, on fp. 3694: * -------------------------------------------------------------------------- 3695: * Arguments: rp (I) ptr to raster struct for which a mime 3696: * xbitmap is to be constructed. 3697: * fp (I) File ptr to output device (defaults to 3698: * stdout if passed as NULL). 3699: * -------------------------------------------------------------------------- 3700: * Returns: ( int ) 1 if completed successfully, 3701: * or 0 otherwise (for any error). 3702: * -------------------------------------------------------------------------- 3703: * Notes: 3704: * ======================================================================= */ 3705: /* --- entry point --- */ 3706: int xbitmap_raster ( raster *rp, FILE *fp ) 3707: { 3708: /* ------------------------------------------------------------------------- 3709: Allocations and Declarations 3710: -------------------------------------------------------------------------- */ 3711: char *title = "image"; /* dummy title */ 3712: int hex_bitmap(); /* dump bitmap as hex bytes */ 3713: /* -------------------------------------------------------------------------- 3714: emit text to display mime xbitmap representation of rp->bitmap image 3715: -------------------------------------------------------------------------- */ 3716: /* --- first redirect null fp --- */ 3717: if ( fp == (FILE *)NULL ) fp = stdout; /* default fp to stdout if null */ 3718: /* --- check for ascii string --- */ 3719: if ( isstring ) /* pixmap has string, not raster */ 3720: return ( 0 ); /* can't handle ascii string */ 3721: /* --- emit prologue strings and hex dump of bitmap for mime xbitmap --- */ 3722: fprintf( fp, "Content-type: image/x-xbitmap\n\n" ); 3723: fprintf( fp, "#define %s_width %d\n#define %s_height %d\n", 3724: title,rp->width, title,rp->height ); 3725: fprintf( fp, "static char %s_bits[] = {\n", title ); 3726: hex_bitmap(rp,fp,0,0); /* emit hex dump of bitmap bytes */ 3727: fprintf (fp,"};\n"); /* ending with "};" for C array */ 3728: /* ------------------------------------------------------------------------- 3729: Back to caller with 1=okay, 0=failed. 3730: -------------------------------------------------------------------------- */ 3731: return ( 1 ); 3732: } /* --- end-of-function xbitmap_raster() --- */ 3733: 3734: 3735: /* ========================================================================== 3736: * Function: type_pbmpgm ( rp, ptype, file ) 3737: * Purpose: Write pbm or pgm image of rp to file 3738: * -------------------------------------------------------------------------- 3739: * Arguments: rp (I) ptr to raster struct for which 3740: * a pbm/pgm file is to be written. 3741: * ptype (I) int containing 1 for pbm, 2 for pgm, or 3742: * 0 to determine ptype from values in rp 3743: * file (I) ptr to null-terminated char string 3744: * containing name of fuke to be written 3745: * (see notes below). 3746: * -------------------------------------------------------------------------- 3747: * Returns: ( int ) total #bytes written, 3748: * or 0 for any error. 3749: * -------------------------------------------------------------------------- 3750: * Notes: o (a) If file==NULL, output is written to stdout; 3751: * (b) if *file=='\000' then file is taken as the 3752: * address of an output buffer to which output 3753: * is written (and is followed by a terminating 3754: * '\0' which is not counted in #bytes returned); 3755: * (c) otherwise file is the filename (opened and 3756: * closed internally) to which output is written, 3757: * except that any final .ext extension is replaced 3758: * by .pbm or .pgm depending on ptype. 3759: * ======================================================================= */ 3760: /* --- entry point --- */ 3761: int type_pbmpgm ( raster *rp, int ptype, char *file ) 3762: { 3763: /* ------------------------------------------------------------------------- 3764: Allocations and Declarations 3765: -------------------------------------------------------------------------- */ 3766: int isokay=0, nbytes=0; /* completion flag, total #bytes written */ 3767: int irow=0, jcol=0; /*height(row), width(col) indexes in raster*/ 3768: int pixmin=9999, pixmax=(-9999), /* min, max pixel value in raster */ 3769: ngray = 0; /* #gray scale values */ 3770: FILE /* *fopen(), */ *fp=NULL; /* pointer to output file (or NULL) */ 3771: char outline[1024], outfield[256], /* output line, field */ 3772: cr[16] = "\n\000"; /* cr at end-of-line */ 3773: int maxlinelen = 70; /* maximum allowed line length */ 3774: int pixfrac=6; /* use (pixmax-pixmin)/pixfrac as step */ 3775: static char 3776: *suffix[] = { NULL, ".pbm", ".pgm" }, /* file.suffix[ptype] */ 3777: *magic[] = { NULL, "P1", "P2" }, /*identifying "magic number"*/ 3778: *mode[] = { NULL, "w", "w" }; /* fopen() mode[ptype] */ 3779: /* ------------------------------------------------------------------------- 3780: check input, determine grayscale, and set up output file if necessary 3781: -------------------------------------------------------------------------- */ 3782: /* --- check input args --- */ 3783: if ( rp == NULL ) goto end_of_job; /* no input raster provided */ 3784: if ( ptype != 0 ) /* we'll determine ptype below */ 3785: if ( ptype<1 || ptype>2 ) goto end_of_job; /*invalid output graphic format*/ 3786: /* --- determine largest (and smallest) value in pixmap --- */ 3787: for ( irow=0; irow<rp->height; irow++ ) /* for each row, top-to-bottom */ 3788: for ( jcol=0; jcol<rp->width; jcol++ ) /* for each col, left-to-right */ 3789: { int pixval = getpixel(rp,irow,jcol); /* value of pixel at irow,jcol */ 3790: pixmin = min2(pixmin,pixval); /* new minimum */ 3791: pixmax = max2(pixmax,pixval); } /* new maximum */ 3792: ngray = 1 + (pixmax-pixmin); /* should be 2 for b/w bitmap */ 3793: if ( ptype == 0 ) /* caller wants us to set ptype */ 3794: ptype = (ngray>=3?2:1); /* use grayscale if >2 shades */ 3795: /* --- open output file if necessary --- */ 3796: if ( file == NULL ) fp = stdout; /*null ptr signals output to stdout*/ 3797: else if ( *file != '\000' ) { /* explicit filename provided, so...*/ 3798: char fname[512], *pdot=NULL; /* file.ext, ptr to last . in fname*/ 3799: strncpy(fname,file,255); /* local copy of file name */ 3800: fname[255] = '\000'; /* make sure it's null terminated */ 3801: if ( (pdot=strrchr(fname,'.')) == NULL ) /*no extension on original name*/ 3802: strcat(fname,suffix[ptype]); /* so add extension */ 3803: else /* we already have an extension */ 3804: strcpy(pdot,suffix[ptype]); /* so replace original extension */ 3805: if ( (fp = fopen(fname,mode[ptype])) /* open output file */ 3806: == (FILE *)NULL ) goto end_of_job; /* quit if failed to open */ 3807: } /* --- ens-of-if(*file!='\0') --- */ 3808: /* ------------------------------------------------------------------------- 3809: format and write header 3810: -------------------------------------------------------------------------- */ 3811: /* --- format header info --- */ 3812: *outline = '\000'; /* initialize line buffer */ 3813: strcat(outline,magic[ptype]); /* begin file with "magic number" */ 3814: strcat(outline,cr); /* followed by cr to end line */ 3815: sprintf(outfield,"%d %d",rp->width,rp->height); /* format width and height */ 3816: strcat(outline,outfield); /* add width and height to header */ 3817: strcat(outline,cr); /* followed by cr to end line */ 3818: if ( ptype == 2 ) /* need max grayscale value */ 3819: { sprintf(outfield,"%d",pixmax); /* format maximum pixel value */ 3820: strcat(outline,outfield); /* add max value to header */ 3821: strcat(outline,cr); } /* followed by cr to end line */ 3822: /* --- write header to file or memory buffer --- */ 3823: if ( fp == NULL ) /* if we have no open file... */ 3824: strcat(file,outline); /* add header to caller's buffer */ 3825: else /* or if we have an open file... */ 3826: if ( fputs(outline,fp) /* try writing header to open file */ 3827: == EOF ) goto end_of_job; /* return with error if failed */ 3828: nbytes += strlen(outline); /* bump output byte count */ 3829: /* ------------------------------------------------------------------------- 3830: format and write pixels 3831: -------------------------------------------------------------------------- */ 3832: *outline = '\000'; /* initialize line buffer */ 3833: for ( irow=0; irow<=rp->height; irow++ ) /* for each row, top-to-bottom */ 3834: for ( jcol=0; jcol<rp->width; jcol++ ) { /* for each col, left-to-right */ 3835: /* --- format value at irow,jcol--- */ 3836: *outfield = '\000'; /* init empty field */ 3837: if ( irow < rp->height ) { /* check row index */ 3838: int pixval = getpixel(rp,irow,jcol); /* value of pixel at irow,jcol */ 3839: if ( ptype == 1 ) /* pixval must be 1 or 0 */ 3840: pixval = (pixval>pixmin+((pixmax-pixmin)/pixfrac)?1:0); 3841: sprintf(outfield,"%d ",pixval); } /* format pixel value */ 3842: /* --- write line if this value won't fit on it (or last line) --- */ 3843: if ( strlen(outline)+strlen(outfield)+strlen(cr) >= maxlinelen /*won't fit*/ 3844: || irow >= rp->height ) { /* force writing last line */ 3845: strcat(outline,cr); /* add cr to end current line */ 3846: if ( fp == NULL ) /* if we have no open file... */ 3847: strcat(file,outline); /* add header to caller's buffer */ 3848: else /* or if we have an open file... */ 3849: if ( fputs(outline,fp) /* try writing header to open file */ 3850: == EOF ) goto end_of_job; /* return with error if failed */ 3851: nbytes += strlen(outline); /* bump output byte count */ 3852: *outline = '\000'; /* re-initialize line buffer */ 3853: } /* --- end-of-if(strlen>=maxlinelen) --- */ 3854: if ( irow >= rp->height ) break; /* done after writing last line */ 3855: /* --- concatanate value to line -- */ 3856: strcat(outline,outfield); /* concatanate value to line */ 3857: } /* --- end-of-for(jcol,irow) --- */ 3858: isokay = 1; /* signal successful completion */ 3859: /* ------------------------------------------------------------------------- 3860: Back to caller with total #bytes written, or 0=failed. 3861: -------------------------------------------------------------------------- */ 3862: end_of_job: 3863: if ( fp != NULL /* output written to an open file */ 3864: && fp != stdout ) /* and it's not just stdout */ 3865: fclose(fp); /* so close file before returning */ 3866: return ( (isokay?nbytes:0) ); /*back to caller with #bytes written*/ 3867: } /* --- end-of-function type_pbmpgm() --- */ 3868: 3869: 3870: /* ========================================================================== 3871: * Function: cstruct_chardef ( cp, fp, col1 ) 3872: * Purpose: Emit a C struct of cp on fp, starting in col1. 3873: * -------------------------------------------------------------------------- 3874: * Arguments: cp (I) ptr to chardef struct for which 3875: * a C struct is to be generated. 3876: * fp (I) File ptr to output device (defaults to 3877: * stdout if passed as NULL). 3878: * col1 (I) int containing 0...65; output lines 3879: * are preceded by col1 blanks. 3880: * -------------------------------------------------------------------------- 3881: * Returns: ( int ) 1 if completed successfully, 3882: * or 0 otherwise (for any error). 3883: * -------------------------------------------------------------------------- 3884: * Notes: 3885: * ======================================================================= */ 3886: /* --- entry point --- */ 3887: int cstruct_chardef ( chardef *cp, FILE *fp, int col1 ) 3888: { 3889: /* ------------------------------------------------------------------------- 3890: Allocations and Declarations 3891: -------------------------------------------------------------------------- */ 3892: char field[64]; /* field within output line */ 3893: int cstruct_raster(), /* emit a raster */ 3894: emit_string(); /* emit a string and comment */ 3895: /* ------------------------------------------------------------------------- 3896: emit charnum, location, name / hirow, hicol, lorow, locol 3897: -------------------------------------------------------------------------- */ 3898: /* --- charnum, location, name --- */ 3899: sprintf(field,"{ %3d,%5d,\n", cp->charnum,cp->location); /*char#,location*/ 3900: emit_string ( fp, col1, field, "character number, location"); 3901: /* --- toprow, topleftcol, botrow, botleftcol --- */ 3902: sprintf(field," %3d,%2d, %3d,%2d,\n", /* format... */ 3903: cp->toprow,cp->topleftcol, /* toprow, topleftcol, */ 3904: cp->botrow,cp->botleftcol); /* and botrow, botleftcol */ 3905: emit_string ( fp, col1, field, "topleft row,col, and botleft row,col"); 3906: /* ------------------------------------------------------------------------- 3907: emit raster and chardef's closing brace, and then return to caller 3908: -------------------------------------------------------------------------- */ 3909: cstruct_raster(&cp->image,fp,col1+4); /* emit raster */ 3910: emit_string ( fp, 0, " }", NULL); /* emit closing brace */ 3911: return ( 1 ); /* back to caller with 1=okay, 0=failed */ 3912: } /* --- end-of-function cstruct_chardef() --- */ 3913: 3914: 3915: /* ========================================================================== 3916: * Function: cstruct_raster ( rp, fp, col1 ) 3917: * Purpose: Emit a C struct of rp on fp, starting in col1. 3918: * -------------------------------------------------------------------------- 3919: * Arguments: rp (I) ptr to raster struct for which 3920: * a C struct is to be generated. 3921: * fp (I) File ptr to output device (defaults to 3922: * stdout if passed as NULL). 3923: * col1 (I) int containing 0...65; output lines 3924: * are preceded by col1 blanks. 3925: * -------------------------------------------------------------------------- 3926: * Returns: ( int ) 1 if completed successfully, 3927: * or 0 otherwise (for any error). 3928: * -------------------------------------------------------------------------- 3929: * Notes: 3930: * ======================================================================= */ 3931: /* --- entry point --- */ 3932: int cstruct_raster ( raster *rp, FILE *fp, int col1 ) 3933: { 3934: /* ------------------------------------------------------------------------- 3935: Allocations and Declarations 3936: -------------------------------------------------------------------------- */ 3937: char field[64]; /* field within output line */ 3938: char typecast[64] = "(pixbyte *)"; /* type cast for pixmap string */ 3939: int hex_bitmap(); /* to emit raster bitmap */ 3940: int emit_string(); /* emit a string and comment */ 3941: /* ------------------------------------------------------------------------- 3942: emit width and height 3943: -------------------------------------------------------------------------- */ 3944: sprintf(field,"{ %2d, %3d,%2d,%2d, %s\n", /* format width,height,pixsz */ 3945: rp->width,rp->height,rp->format,rp->pixsz,typecast); 3946: emit_string ( fp, col1, field, "width,ht, fmt,pixsz,map..."); 3947: /* ------------------------------------------------------------------------- 3948: emit bitmap and closing brace, and return to caller 3949: -------------------------------------------------------------------------- */ 3950: hex_bitmap(rp,fp,col1+2,1); /* emit bitmap */ 3951: emit_string ( fp, 0, " }", NULL); /* emit closing brace */ 3952: return ( 1 ); /* back to caller with 1=okay, 0=failed */ 3953: } /* --- end-of-function cstruct_raster() --- */ 3954: 3955: 3956: /* ========================================================================== 3957: * Function: hex_bitmap ( rp, fp, col1, isstr ) 3958: * Purpose: Emit a hex dump of the bitmap of rp on fp, starting in col1. 3959: * If isstr (is string) is true, the dump is of the form 3960: * "\x01\x02\x03\x04\x05..." 3961: * Otherwise, if isstr is false, the dump is of the form 3962: * 0x01,0x02,0x03,0x04,0x05... 3963: * -------------------------------------------------------------------------- 3964: * Arguments: rp (I) ptr to raster struct for which 3965: * a hex dump is to be constructed. 3966: * fp (I) File ptr to output device (defaults to 3967: * stdout if passed as NULL). 3968: * col1 (I) int containing 0...65; output lines 3969: * are preceded by col1 blanks. 3970: * isstr (I) int specifying dump format as described above 3971: * -------------------------------------------------------------------------- 3972: * Returns: ( int ) 1 if completed successfully, 3973: * or 0 otherwise (for any error). 3974: * -------------------------------------------------------------------------- 3975: * Notes: 3976: * ======================================================================= */ 3977: /* --- entry point --- */ 3978: int hex_bitmap ( raster *rp, FILE *fp, int col1, int isstr ) 3979: { 3980: /* ------------------------------------------------------------------------- 3981: Allocations and Declarations 3982: -------------------------------------------------------------------------- */ 3983: int ibyte, /* pixmap[ibyte] index */ 3984: nbytes = pixbytes(rp); /*#bytes in bitmap or .gf-formatted*/ 3985: char stub[64]=" ";/* col1 leading blanks */ 3986: int linewidth = 64, /* (roughly) rightmost column */ 3987: colwidth = (isstr? 4:5); /* #cols required for each byte */ 3988: int ncols = (linewidth-col1)/colwidth; /* new line after ncols bytes */ 3989: /* -------------------------------------------------------------------------- 3990: initialization 3991: -------------------------------------------------------------------------- */ 3992: /* --- redirect null fp --- */ 3993: if ( fp == (FILE *)NULL ) fp = stdout; /* default fp to stdout if null */ 3994: /* --- emit initial stub if wanted --- */ 3995: if ( col1 > 0 ) fprintf(fp,"%.*s",col1,stub); /* stub preceding 1st line */ 3996: /* -------------------------------------------------------------------------- 3997: emit hex dump of rp->bitmap image 3998: -------------------------------------------------------------------------- */ 3999: if ( isstr ) fprintf(fp,"\""); /* opening " before first line */ 4000: for ( ibyte=0; ibyte<nbytes; ibyte++ ) /* one byte at a time */ 4001: { 4002: /* --- display a byte as hex char or number, depending on isstr --- */ 4003: if ( isstr ) /* string format wanted */ 4004: fprintf(fp,"\\x%02x",(rp->pixmap)[ibyte]); /*print byte as hex char*/ 4005: else /* comma-separated format wanted */ 4006: fprintf(fp,"0x%02x",(rp->pixmap)[ibyte]); /*print byte as hex number*/ 4007: /* --- add a separator and newline, etc, as necessary --- */ 4008: if ( ibyte < nbytes-1) /* not the last byte yet */ 4009: { 4010: if ( !isstr ) fprintf(fp,","); /* follow hex number with comma */ 4011: if ( (ibyte+1)%ncols==0 ) { /* need new line after every ncols */ 4012: if ( !isstr ) /* for hex numbers format ... */ 4013: fprintf(fp,"\n%.*s",col1,stub); /* ...just need newline and stub */ 4014: else /* for string format... */ 4015: fprintf(fp,"\"\n%.*s\"",col1,stub); } /*...need closing, opening "s*/ 4016: } /* --- end-of-if(ibyte<nbytes-1) --- */ 4017: } /* --- end-of-for(ibyte) --- */ 4018: if ( isstr ) fprintf(fp,"\""); /* closing " after last line */ 4019: return ( 1 ); /* back with 1=okay, 0=failed */ 4020: } /* --- end-of-function hex_bitmap() --- */ 4021: 4022: 4023: /* ========================================================================== 4024: * Function: emit_string ( fp, col1, string, comment ) 4025: * Purpose: Emit string on fp, starting in col1, 4026: * and followed by right-justified comment. 4027: * -------------------------------------------------------------------------- 4028: * Arguments: fp (I) File ptr to output device (defaults to 4029: * stdout if passed as NULL). 4030: * col1 (I) int containing 0 or #blanks preceding string 4031: * string (I) char * containing string to be emitted. 4032: * If last char of string is '\n', 4033: * the emitted line ends with a newline, 4034: * otherwise not. 4035: * comment (I) NULL or char * containing right-justified 4036: * comment (we enclose between /star and star/) 4037: * -------------------------------------------------------------------------- 4038: * Returns: ( int ) 1 if completed successfully, 4039: * or 0 otherwise (for any error). 4040: * -------------------------------------------------------------------------- 4041: * Notes: o 4042: * ======================================================================= */ 4043: /* --- entry point --- */ 4044: int emit_string ( FILE *fp, int col1, char *string, char *comment ) 4045: { 4046: /* ------------------------------------------------------------------------- 4047: Allocations and Declarations 4048: -------------------------------------------------------------------------- */ 4049: char line[256]; /* construct line with caller's fields */ 4050: int fieldlen; /* #chars in one of caller's fields */ 4051: int linelen = 72; /*line length (for right-justified comment)*/ 4052: int isnewline = 0; /* true to emit \n at end of line */ 4053: /* -------------------------------------------------------------------------- 4054: construct line containing prolog, string, epilog, and finally comment 4055: -------------------------------------------------------------------------- */ 4056: /* --- init line --- */ 4057: memset(line,' ',255); /* start line with blanks */ 4058: /* --- embed string into line --- */ 4059: if ( string != NULL ) /* if caller gave us a string... */ 4060: { fieldlen = strlen(string); /* #cols required for string */ 4061: if ( string[fieldlen-1] == '\n' ) /* check last char for newline */ 4062: { isnewline = 1; /* got it, so set flag */ 4063: fieldlen--; } /* but don't print it yet */ 4064: memcpy(line+col1,string,fieldlen); /* embid string starting at col1 */ 4065: col1 += fieldlen; } /* bump col past epilog */ 4066: /* --- embed comment into line --- */ 4067: if ( comment != NULL ) /* if caller gave us a comment... */ 4068: { fieldlen = 6 + strlen(comment); /* plus /star, star/, 2 spaces */ 4069: if ( linelen-fieldlen < col1 ) /* comment won't fit */ 4070: fieldlen -= (col1 - (linelen-fieldlen)); /* truncate comment to fit */ 4071: if ( fieldlen > 6 ) /* can fit all or part of comment */ 4072: sprintf(line+linelen-fieldlen,"/%c %.*s %c/", /* so embed it in line */ 4073: '*', fieldlen-6,comment, '*'); 4074: col1 = linelen; } /* indicate line filled */ 4075: /* --- line completed --- */ 4076: line[col1] = '\000'; /* null-terminate completed line */ 4077: /* ------------------------------------------------------------------------- 4078: emit line, then back to caller with 1=okay, 0=failed. 4079: -------------------------------------------------------------------------- */ 4080: /* --- first redirect null fp --- */ 4081: if ( fp == (FILE *)NULL ) fp = stdout; /* default fp to stdout if null */ 4082: /* --- emit line (and optional newline) --- */ 4083: fprintf(fp,"%.*s",linelen,line); /* no more than linelen chars */ 4084: if ( isnewline ) fprintf(fp,"\n"); /*caller wants terminating newline*/ 4085: return ( 1 ); 4086: } /* --- end-of-function emit_string() --- */ 4087: 4088: 4089: /* ========================================================================== 4090: * Function: gftobitmap ( gf ) 4091: * Purpose: convert .gf-like pixmap to bitmap image 4092: * -------------------------------------------------------------------------- 4093: * Arguments: gf (I) raster * to struct in .gf-format 4094: * -------------------------------------------------------------------------- 4095: * Returns: ( raster * ) image-format raster * if successful, 4096: * or NULL for any error. 4097: * -------------------------------------------------------------------------- 4098: * Notes: o 4099: * ======================================================================= */ 4100: /* --- entry point --- */ 4101: raster *gftobitmap ( raster *gf ) 4102: { 4103: /* ------------------------------------------------------------------------- 4104: Allocations and Declarations 4105: -------------------------------------------------------------------------- */ 4106: raster *new_raster(), *rp=NULL; /* image raster retuned to caller */ 4107: int width=0, height=0, totbits=0; /* gf->width, gf->height, #bits */ 4108: int format=0, icount=0, ncounts=0, /*.gf format, count index, #counts*/ 4109: ibit=0, bitval=0; /* bitmap index, bit value */ 4110: int isrepeat = 1, /* true to process repeat counts */ 4111: repeatcmds[2] = {255,15}, /*opcode for repeat/duplicate count*/ 4112: nrepeats=0, irepeat=0, /* scan line repeat count,index */ 4113: wbits = 0; /* count bits to width of scan line*/ 4114: /* ------------------------------------------------------------------------- 4115: initialization 4116: -------------------------------------------------------------------------- */ 4117: /* --- check args --- */ 4118: if ( gf == NULL ) goto end_of_job; /* input raster not provided */ 4119: format = gf->format; /* 2 or 3 */ 4120: if ( format!=2 && format!=3 ) goto end_of_job; /* invalid raster format */ 4121: ncounts = gf->pixsz; /*pixsz is really #counts in pixmap*/ 4122: /* --- allocate output raster with proper dimensions for bitmap --- */ 4123: width=gf->width; height=gf->height; /* dimensions of raster */ 4124: if ( (rp = new_raster(width,height,1)) /* allocate new raster and bitmap */ 4125: == NULL ) goto end_of_job; /* quit if failed to allocate */ 4126: totbits = width*height; /* total #bits in image */ 4127: /* ------------------------------------------------------------------------- 4128: fill bitmap 4129: -------------------------------------------------------------------------- */ 4130: for ( icount=0,bitval=0; icount<ncounts; icount++ ) 4131: { 4132: int nbits = (int)(getbyfmt(format,gf->pixmap,icount)); /*#bits to set*/ 4133: if ( isrepeat /* we're proxessing repeat counts */ 4134: && nbits == repeatcmds[format-2] ) { /* and repeat opcode found */ 4135: if ( nrepeats == 0 ) /* recursive repeat is error */ 4136: { nrepeats = (int)(getbyfmt(format,gf->pixmap,icount+1));/*repeat count*/ 4137: nbits = (int)(getbyfmt(format,gf->pixmap,icount+2)); /*#bits to set*/ 4138: icount += 2; } /* bump byte/nibble count */ 4139: else /* some internal error occurred */ 4140: if ( msgfp!=NULL && msglevel>=1 ) /* report error */ 4141: fprintf(msgfp,"gftobitmap> found embedded repeat command\n"); } 4142: if ( 0 ) 4143: fprintf(stdout, 4144: "gftobitmap> icount=%d bitval=%d nbits=%d ibit=%d totbits=%d\n", 4145: icount,bitval,nbits,ibit,totbits); 4146: for ( ; nbits>0; nbits-- ) /* count down */ 4147: { if ( ibit >= totbits ) goto end_of_job; /* overflow check */ 4148: for ( irepeat=0; irepeat<=nrepeats; irepeat++ ) 4149: if ( bitval == 1 ) /* set pixel */ 4150: { setlongbit(rp->pixmap,(ibit+irepeat*width)); } 4151: else /* clear pixel */ 4152: { unsetlongbit(rp->pixmap,(ibit+irepeat*width)); } 4153: if ( nrepeats > 0 ) wbits++; /* count another repeated bit */ 4154: ibit++; } /* bump bit index */ 4155: bitval = 1-bitval; /* flip bit value */ 4156: if ( wbits >= width ) { /* completed repeats */ 4157: ibit += nrepeats*width; /*bump bit count past repeated scans*/ 4158: if ( wbits > width ) /* out-of alignment error */ 4159: if ( msgfp!=NULL && msglevel>=1 ) /* report error */ 4160: fprintf(msgfp,"gftobitmap> width=%d wbits=%d\n",width,wbits); 4161: wbits = nrepeats = 0; } /* reset repeat counts */ 4162: } /* --- end-of-for(icount) --- */ 4163: end_of_job: 4164: return ( rp ); /* back to caller with image */ 4165: } /* --- end-of-function gftobitmap() --- */ 4166: 4167: 4168: /* ========================================================================== 4169: * Function: get_symdef ( symbol ) 4170: * Purpose: returns mathchardef struct for symbol 4171: * -------------------------------------------------------------------------- 4172: * Arguments: symbol (I) char * containing symbol 4173: * whose corresponding mathchardef is wanted 4174: * -------------------------------------------------------------------------- 4175: * Returns: ( mathchardef * ) pointer to struct defining symbol, 4176: * or NULL for any error 4177: * -------------------------------------------------------------------------- 4178: * Notes: o Input symbol need only contain a leading substring to match, 4179: * e.g., \gam passed in symbol will match \gamma in the table. 4180: * If the table contains two or more possible matches, 4181: * the shortest is returned, e.g., input \e will return with 4182: * data for \eta rather than \epsilon. To get \epsilon, 4183: * you must pass a leading substring long enough to eliminate 4184: * shorter table matches, i.e., in this case \ep 4185: * ======================================================================= */ 4186: /* --- entry point --- */ 4187: mathchardef *get_symdef ( char *symbol ) 4188: { 4189: /* ------------------------------------------------------------------------- 4190: Allocations and Declarations 4191: -------------------------------------------------------------------------- */ 4192: mathchardef *symdefs = symtable; /* table of mathchardefs */ 4193: int ligdef=0, get_ligature(); /* or we may have a ligature */ 4194: int idef = 0, /* symdefs[] index */ 4195: bestdef = (-9999); /*index of shortest matching symdef*/ 4196: int symlen = strlen(symbol), /* length of input symbol */ 4197: deflen, minlen=9999; /*length of shortest matching symdef*/ 4198: int /*alnumsym = (symlen==1 && isalnum(*symbol)),*/ /*alphanumeric sym*/ 4199: alphasym = (symlen==1 && isalpha(*symbol)), /* or alpha symbol */ 4200: slashsym = (*symbol=='\\'); /* or \backslashed symbol */ 4201: int family = fontinfo[fontnum].family; /* current font family */ 4202: static char *displaysyms[][2] = { /*xlate to Big sym for \displaystyle*/ 4203: /* --- see table on page 536 in TLC2 --- */ 4204: {"\\int", "\\Bigint"}, 4205: {"\\oint", "\\Bigoint"}, 4206: {"\\sum", "\\Bigsum"}, 4207: {"\\prod", "\\Bigprod"}, 4208: {"\\coprod", "\\Bigcoprod"}, 4209: /* --- must be 'big' when related to similar binary operators --- */ 4210: {"\\bigcup", "\\Bigcup"}, 4211: {"\\bigsqcup", "\\Bigsqcup"}, 4212: {"\\bigcap", "\\Bigcap"}, 4213: /*{"\\bigsqcap", "\\sqcap"},*/ /* don't have \Bigsqcap */ 4214: {"\\bigodot", "\\Bigodot"}, 4215: {"\\bigoplus", "\\Bigoplus"}, 4216: {"\\bigominus", "\\ominus"}, 4217: {"\\bigotimes", "\\Bigotimes"}, 4218: {"\\bigoslash", "\\oslash"}, 4219: {"\\biguplus", "\\Biguplus"}, 4220: {"\\bigwedge", "\\Bigwedge"}, 4221: {"\\bigvee", "\\Bigvee"}, 4222: {NULL, NULL} }; 4223: /* ------------------------------------------------------------------------- 4224: First check for ligature 4225: -------------------------------------------------------------------------- */ 4226: isligature = 0; /* init signal for no ligature */ 4227: if ( family == CYR10 ) /*only check for cyrillic ligatures*/ 4228: if ( (ligdef=get_ligature(subexprptr,family)) /* check for ligature */ 4229: >= 0 ) /* found a ligature */ 4230: { bestdef = ligdef; /* set bestdef for ligature */ 4231: isligature = 1; /* signal we found a ligature */ 4232: goto end_of_job; } /* so just give it to caller */ 4233: /* ------------------------------------------------------------------------- 4234: If in \displaystyle mode, first xlate int to Bigint, etc. 4235: -------------------------------------------------------------------------- */ 4236: if ( isdisplaystyle > 1 ) /* we're in \displaystyle mode */ 4237: for ( idef=0; ; idef++ ) { /* lookup symbol in displaysyms */ 4238: char *fromsym = displaysyms[idef][0], /* look for this symbol */ 4239: *tosym = displaysyms[idef][1]; /* and xlate it to this symbol */ 4240: if ( fromsym == NULL ) break; /* end-of-table */ 4241: if ( !strcmp(symbol,fromsym) ) /* found a match */ 4242: { if ( msglevel>=99 && msgfp!=NULL ) /* debugging output */ 4243: { fprintf(msgfp,"get_symdef> isdisplaystyle=%d, xlated %s to %s\n", 4244: isdisplaystyle,symbol,tosym); fflush(msgfp); } 4245: symbol = tosym; /* so look up tosym instead */ 4246: symlen = strlen(symbol); /* reset symbol length */ 4247: break; } /* no need to search further */ 4248: } /* --- end-of-for(idef) --- */ 4249: /* ------------------------------------------------------------------------- 4250: search symdefs[] in order for first occurrence of symbol 4251: -------------------------------------------------------------------------- */ 4252: for ( idef=0; ;idef++ ) /* until trailer record found */ 4253: if ( symdefs[idef].symbol == NULL ) break; /* reached end-of-table */ 4254: else /* check against caller's symbol */ 4255: if ( strncmp(symbol,symdefs[idef].symbol,symlen) == 0 ) /* found match */ 4256: if ( (fontnum==0||family==CYR10) /* mathmode, so check every match */ 4257: || (1 && symdefs[idef].handler!=NULL) /* or check every directive */ 4258: || (1 && istextmode && slashsym) /*text mode and \backslashed symbol*/ 4259: || (0 && istextmode && (!alphasym /* text mode and not alpha symbol */ 4260: || symdefs[idef].handler!=NULL)) /* or text mode and directive */ 4261: || (symdefs[idef].family==family /* have correct family */ 4262: && symdefs[idef].handler==NULL) ) /* and not a handler collision */ 4263: #if 0 4264: || (fontnum==1 && symdefs[idef].family==CMR10) /*textmode && rm text*/ 4265: || (fontnum==2 && symdefs[idef].family==CMMI10) /*textmode && it text*/ 4266: || (fontnum==3 && symdefs[idef].family==BBOLD10 /*textmode && bb text*/ 4267: && symdefs[idef].handler==NULL) 4268: || (fontnum==4 && symdefs[idef].family==CMMIB10 /*textmode && bf text*/ 4269: && symdefs[idef].handler==NULL) ) 4270: #endif 4271: if ( (deflen=strlen(symdefs[idef].symbol)) < minlen ) /*new best match*/ 4272: { bestdef = idef; /* save index of new best match */ 4273: if ( (minlen = deflen) /* and save its len for next test */ 4274: == symlen ) break; } /*perfect match, so return with it*/ 4275: if ( bestdef < 0 ) /* failed to look up symbol */ 4276: if ( fontnum != 0 ) /* we're in a restricted font mode */ 4277: { int oldfontnum = fontnum; /* save current font family */ 4278: mathchardef *symdef = NULL; /* lookup result with fontnum=0 */ 4279: fontnum = 0; /*try to look up symbol in any font*/ 4280: symdef = get_symdef(symbol); /* repeat lookup with fontnum=0 */ 4281: fontnum = oldfontnum; /* reset font family */ 4282: return symdef; } /* caller gets fontnum=0 lookup */ 4283: end_of_job: 4284: if ( msgfp!=NULL && msglevel>=999 ) /* debugging output */ 4285: { fprintf(msgfp, 4286: "get_symdef> symbol=%s matches symtable[%d]=%s (isligature=%d)\n", 4287: symbol,bestdef,(bestdef<0?"NotFound":symdefs[bestdef].symbol),isligature); 4288: fflush(msgfp); } 4289: return ( (bestdef<0? NULL : &(symdefs[bestdef])) );/*NULL or best symdef[]*/ 4290: } /* --- end-of-function get_symdef() --- */ 4291: 4292: 4293: /* ========================================================================== 4294: * Function: get_ligature ( expression, family ) 4295: * Purpose: returns symtable[] index for ligature 4296: * -------------------------------------------------------------------------- 4297: * Arguments: expression (I) char * containing ligature 4298: * whose corresponding mathchardef is wanted 4299: * family (I) int containing NOVALUE for any family, 4300: * or, e.g., CYR10 for cyrillic, etc. 4301: * -------------------------------------------------------------------------- 4302: * Returns: ( int ) symtable[] index defining ligature, 4303: * or -9999 if no ligature found or for any error 4304: * -------------------------------------------------------------------------- 4305: * Notes: o 4306: * ======================================================================= */ 4307: /* --- entry point --- */ 4308: int get_ligature ( char *expression, int family ) 4309: { 4310: /* ------------------------------------------------------------------------- 4311: Allocations and Declarations 4312: -------------------------------------------------------------------------- */ 4313: mathchardef *symdefs = symtable; /* table of mathchardefs */ 4314: char *ligature = expression /*- 1*/, /* expression ptr */ 4315: *symbol = NULL; /* symdefs[idef].symbol */ 4316: int liglen = strlen(ligature); /* #chars remaining in expression */ 4317: int iscyrfam = (family==CYR10); /* true for cyrillic families */ 4318: int idef = 0, /* symdefs[] index */ 4319: bestdef = (-9999), /*index of longest matching symdef*/ 4320: maxlen=(-9999); /*length of longest matching symdef*/ 4321: /* ------------------------------------------------------------------------- 4322: search symdefs[] in order for first occurrence of symbol 4323: -------------------------------------------------------------------------- */ 4324: if ( !isstring ) { /* no ligatures in "string" mode */ 4325: for ( idef=0; ;idef++ ) /* until trailer record found */ 4326: if ( (symbol=symdefs[idef].symbol) == NULL ) break; /* end-of-table */ 4327: else { /* check against caller's ligature */ 4328: int symlen = strlen(symbol); /* #chars in symbol */ 4329: if ( ( symlen>1 || iscyrfam ) /*ligature >1 char long or cyrillic*/ 4330: && symlen <= liglen /* and enough remaining chars */ 4331: && ( *symbol!='\\' || iscyrfam ) /* not escaped or cyrillic */ 4332: && symdefs[idef].handler == NULL ) /* and not a handler */ 4333: if ( strncmp(ligature,symbol,symlen) == 0 ) /* found match */ 4334: if ( family < 0 /* no family specifies */ 4335: || symdefs[idef].family == family ) /* or have correct family */ 4336: if ( symlen > maxlen ) /* new longest ligature */ 4337: { bestdef = idef; /* save index of new best match */ 4338: maxlen = symlen; } /* and save its len for next test */ 4339: } /* --- end-of-if/else(symbol==NULL) --- */ 4340: if ( msgfp!=NULL && msglevel>=999 ) /* debugging output */ 4341: { fprintf(msgfp,"get_ligature> ligature=%.4s matches symtable[%d]=%s\n", 4342: ligature,bestdef,(bestdef<0?"NotFound":symdefs[bestdef].symbol)); 4343: fflush(msgfp); } 4344: } /* --- end-of-if(!isstring) --- */ 4345: return ( bestdef ); /* -9999 or index of best symdef[] */ 4346: } /* --- end-of-function get_ligature --- */ 4347: 4348: 4349: /* ========================================================================== 4350: * Function: get_chardef ( symdef, size ) 4351: * Purpose: returns chardef ptr containing data for symdef at given size 4352: * -------------------------------------------------------------------------- 4353: * Arguments: symdef (I) mathchardef * corresponding to symbol 4354: * whose corresponding chardef is wanted 4355: * size (I) int containing 0-5 for desired size 4356: * -------------------------------------------------------------------------- 4357: * Returns: ( chardef * ) pointer to struct defining symbol at size, 4358: * or NULL for any error 4359: * -------------------------------------------------------------------------- 4360: * Notes: o if size unavailable, the next-closer-to-normalsize 4361: * is returned instead. 4362: * ======================================================================= */ 4363: /* --- entry point --- */ 4364: chardef *get_chardef ( mathchardef *symdef, int size ) 4365: { 4366: /* ------------------------------------------------------------------------- 4367: Allocations and Declarations 4368: -------------------------------------------------------------------------- */ 4369: fontfamily *fonts = fonttable; /* table of font families */ 4370: chardef **fontdef, /*tables for desired font, by size*/ 4371: *gfdata = (chardef *)NULL; /* chardef for symdef,size */ 4372: int ifont; /* fonts[] index */ 4373: int family, charnum; /* indexes retrieved from symdef */ 4374: int sizeinc = 0, /*+1 or -1 to get closer to normal*/ 4375: normalsize = 2; /* this size always present */ 4376: int isBig = 0; /*true if symbol's 1st char is upper*/ 4377: char *symptr = NULL; /* look for 1st alpha of symbol */ 4378: /* ------------------------------------------------------------------------- 4379: initialization 4380: -------------------------------------------------------------------------- */ 4381: /* --- check symdef --- */ 4382: if ( symdef == NULL ) goto end_of_job; /* get_symdef() probably failed */ 4383: /* --- get local copy of indexes from symdef --- */ 4384: family = symdef->family; /* font family containing symbol */ 4385: charnum = symdef->charnum; /* char# of symbol within font */ 4386: /* --- check for supersampling --- */ 4387: if ( issupersampling ) /* check for supersampling fonts */ 4388: if ( fonts != ssfonttable ) /* uh oh--probably internal error */ 4389: { fonts = ssfonttable; } /* force it */ 4390: /* --- check requested size, and set size increment --- */ 4391: if ( 0 && issupersampling ) /* set size index for supersampling */ 4392: size = LARGESTSIZE+1; /* index 1 past largest size */ 4393: else /* low pass indexes 0...LARGESTSIZE */ 4394: { 4395: if( size<0 ) size = 0; /* size was definitely too small */ 4396: if( size>LARGESTSIZE ) size = LARGESTSIZE; /* or definitely too large */ 4397: if( size<normalsize ) sizeinc = (+1); /*use next larger if size too small*/ 4398: if( size>normalsize ) sizeinc = (-1); /*or next smaller if size too large*/ 4399: } 4400: /* --- check for really big symbol (1st char of symbol name uppercase) --- */ 4401: for ( symptr=symdef->symbol; *symptr!='\000'; symptr++ ) /*skip leading \'s*/ 4402: if ( isalpha(*symptr) ) /* found leading alpha char */ 4403: { isBig = isupper(*symptr); /* is 1st char of name uppercase? */ 4404: if ( !isBig /* 1st char lowercase */ 4405: && strlen(symptr) >= 4 ) /* but followed by at least 3 chars */ 4406: isBig = !memcmp(symptr,"big\\",4) /* isBig if name starts with big\ */ 4407: || !memcmp(symptr,"bigg",4); /* or with bigg */ 4408: break; } /* don't check beyond 1st char */ 4409: /* ------------------------------------------------------------------------- 4410: find font family in table of fonts[] 4411: -------------------------------------------------------------------------- */ 4412: /* --- look up font family --- */ 4413: for ( ifont=0; ;ifont++ ) /* until trailer record found */ 4414: if ( fonts[ifont].family < 0 ) { /* error, no such family */ 4415: if ( msgfp!=NULL && msglevel>=99 ) { /* emit error */ 4416: fprintf(msgfp,"get_chardef> failed to find font family %d\n", 4417: family); fflush(msgfp); } 4418: goto end_of_job; } /* quit if can't find font family*/ 4419: else if ( fonts[ifont].family == family ) break; /* found font family */ 4420: /* --- get local copy of table for this family by size --- */ 4421: fontdef = fonts[ifont].fontdef; /* font by size */ 4422: /* ------------------------------------------------------------------------- 4423: get font in desired size, or closest available size, and return symbol 4424: -------------------------------------------------------------------------- */ 4425: /* --- get font in desired size --- */ 4426: while ( 1 ) /* find size or closest available */ 4427: if ( fontdef[size] != NULL ) break; /* found available size */ 4428: else /* adjust size closer to normal */ 4429: if ( size == NORMALSIZE /* already normal so no more sizes,*/ 4430: || sizeinc == 0 ) { /* or must be supersampling */ 4431: if ( msgfp!=NULL && msglevel>=99 ) { /* emit error */ 4432: fprintf(msgfp,"get_chardef> failed to find font size %d\n", 4433: size); fflush(msgfp); } 4434: goto end_of_job; } /* quit if can't find desired size */ 4435: else /*bump size 1 closer to NORMALSIZE*/ 4436: size += sizeinc; /* see if adjusted size available */ 4437: /* --- ptr to chardef struct --- */ 4438: gfdata = &((fontdef[size])[charnum]); /*ptr to chardef for symbol in size*/ 4439: /* ------------------------------------------------------------------------- 4440: kludge to tweak CMEX10 (which appears to have incorrect descenders) 4441: -------------------------------------------------------------------------- */ 4442: if ( family == CMEX10 ) /* cmex10 needs tweak */ 4443: { int height = gfdata->toprow - gfdata->botrow + 1; /*total height of char*/ 4444: gfdata->botrow = (isBig? (-height/3) : (-height/4)); 4445: gfdata->toprow = gfdata->botrow + gfdata->image.height; } 4446: /* ------------------------------------------------------------------------- 4447: return subraster containing chardef data for symbol in requested size 4448: -------------------------------------------------------------------------- */ 4449: end_of_job: 4450: if ( msgfp!=NULL && msglevel>=999 ) 4451: { if (symdef == NULL) fprintf(msgfp,"get_chardef> input symdef==NULL\n"); 4452: else 4453: fprintf(msgfp,"get_chardef> requested symbol=\"%s\" size=%d %s\n", 4454: symdef->symbol,size,(gfdata==NULL?"FAILED":"Succeeded")); 4455: fflush(msgfp); } 4456: return ( gfdata ); /*ptr to chardef for symbol in size*/ 4457: } /* --- end-of-function get_chardef() --- */ 4458: 4459: 4460: /* ========================================================================== 4461: * Function: get_charsubraster ( symdef, size ) 4462: * Purpose: returns new subraster ptr containing 4463: * data for symdef at given size 4464: * -------------------------------------------------------------------------- 4465: * Arguments: symdef (I) mathchardef * corresponding to symbol whose 4466: * corresponding chardef subraster is wanted 4467: * size (I) int containing 0-5 for desired size 4468: * -------------------------------------------------------------------------- 4469: * Returns: ( subraster * ) pointer to struct defining symbol at size, 4470: * or NULL for any error 4471: * -------------------------------------------------------------------------- 4472: * Notes: o just wraps a subraster envelope around get_chardef() 4473: * ======================================================================= */ 4474: /* --- entry point --- */ 4475: subraster *get_charsubraster ( mathchardef *symdef, int size ) 4476: { 4477: /* ------------------------------------------------------------------------- 4478: Allocations and Declarations 4479: -------------------------------------------------------------------------- */ 4480: chardef *get_chardef(), *gfdata=NULL; /* chardef struct for symdef,size */ 4481: int get_baseline(); /* baseline of gfdata */ 4482: subraster *new_subraster(), *sp=NULL; /* subraster containing gfdata */ 4483: raster *bitmaprp=NULL, *gftobitmap(); /* convert .gf-format to bitmap */ 4484: int delete_subraster(); /* in case gftobitmap() fails */ 4485: int aasupsamp(), /*antialias char with supersampling*/ 4486: grayscale=256; /* aasupersamp() parameters */ 4487: /* ------------------------------------------------------------------------- 4488: look up chardef for symdef at size, and embed data (gfdata) in subraster 4489: -------------------------------------------------------------------------- */ 4490: if ( (gfdata=get_chardef(symdef,size)) /* look up chardef for symdef,size */ 4491: != NULL ) /* and check that we found it */ 4492: if ( (sp=new_subraster(0,0,0)) /* allocate subraster "envelope" */ 4493: != NULL ) /* and check that we succeeded */ 4494: { 4495: raster *image = &(gfdata->image); /* ptr to chardef's bitmap or .gf */ 4496: int format = image->format; /* 1=bitmap, else .gf */ 4497: sp->symdef = symdef; /* replace NULL with caller's arg */ 4498: sp->size = size; /*replace default with caller's size*/ 4499: sp->baseline = get_baseline(gfdata); /* get baseline of character */ 4500: if ( format == 1 ) /* already a bitmap */ 4501: { sp->type = CHARASTER; /* static char raster */ 4502: sp->image = image; } /* store ptr to its bitmap */ 4503: else /* need to convert .gf-to-bitmap */ 4504: if ( (bitmaprp = gftobitmap(image)) /* convert */ 4505: != (raster *)NULL ) /* successful */ 4506: { sp->type = IMAGERASTER; /* allocated raster will be freed */ 4507: sp->image = bitmaprp; } /* store ptr to converted bitmap */ 4508: else /* conversion failed */ 4509: { delete_subraster(sp); /* free unneeded subraster */ 4510: sp = (subraster *)NULL; /* signal error to caller */ 4511: goto end_of_job; } /* quit */ 4512: if ( issupersampling ) /* antialias character right here */ 4513: { 4514: raster *aa = NULL; /* antialiased char raster */ 4515: int status = aasupsamp(sp->image,&aa,shrinkfactor,grayscale); 4516: if ( status ) /* supersampled successfully */ 4517: { int baseline = sp->baseline; /* baseline before supersampling */ 4518: int height = gfdata->image.height; /* #rows before supersampling */ 4519: sp->image = aa; /* replace chardef with ss image */ 4520: if ( baseline >= height-1 ) /* baseline at bottom of char */ 4521: sp->baseline = aa->height -1; /* so keep it at bottom */ 4522: else /* char has descenders */ 4523: sp->baseline /= shrinkfactor; /* rescale baseline */ 4524: sp->type = IMAGERASTER; } /* character is an image raster */ 4525: } /* --- end-of-if(issupersampling) --- */ 4526: } /* --- end-of-if(sp!=NULL) --- */ 4527: end_of_job: 4528: if ( msgfp!=NULL && msglevel>=999 ) 4529: { fprintf(msgfp,"get_charsubraster> requested symbol=\"%s\" baseline=%d" 4530: " %s %s\n", symdef->symbol, (sp==NULL?0:sp->baseline), 4531: (sp==NULL?"FAILED":"Succeeded"), (gfdata==NULL?"(gfdata=NULL)":" ")); 4532: fflush(msgfp); } 4533: return ( sp ); /* back to caller */ 4534: } /* --- end-of-function get_charsubraster() --- */ 4535: 4536: 4537: /* ========================================================================== 4538: * Function: get_symsubraster ( symbol, size ) 4539: * Purpose: returns new subraster ptr containing 4540: * data for symbol at given size 4541: * -------------------------------------------------------------------------- 4542: * Arguments: symbol (I) char * corresponding to symbol 4543: * whose corresponding subraster is wanted 4544: * size (I) int containing 0-5 for desired size 4545: * -------------------------------------------------------------------------- 4546: * Returns: ( subraster * ) pointer to struct defining symbol at size, 4547: * or NULL for any error 4548: * -------------------------------------------------------------------------- 4549: * Notes: o just combines get_symdef() and get_charsubraster() 4550: * ======================================================================= */ 4551: /* --- entry point --- */ 4552: subraster *get_symsubraster ( char *symbol, int size ) 4553: { 4554: /* ------------------------------------------------------------------------- 4555: Allocations and Declarations 4556: -------------------------------------------------------------------------- */ 4557: subraster *sp=NULL, *get_charsubraster(); /* subraster containing gfdata */ 4558: mathchardef *symdef=NULL, *get_symdef(); /* mathchardef lookup for symbol */ 4559: /* ------------------------------------------------------------------------- 4560: look up mathchardef for symbol 4561: -------------------------------------------------------------------------- */ 4562: if ( symbol != NULL ) /* user supplied input symbol */ 4563: symdef = get_symdef(symbol); /*look up corresponding mathchardef*/ 4564: /* ------------------------------------------------------------------------- 4565: look up chardef for mathchardef and wrap a subraster structure around data 4566: -------------------------------------------------------------------------- */ 4567: if ( symdef != NULL ) /* lookup succeeded */ 4568: sp = get_charsubraster(symdef,size); /* so get symbol data in subraster */ 4569: return ( sp ); /* back to caller with sp or NULL */ 4570: } /* --- end-of-function get_symsubraster() --- */ 4571: 4572: 4573: /* ========================================================================== 4574: * Function: get_baseline ( gfdata ) 4575: * Purpose: returns baseline for a chardef struct 4576: * -------------------------------------------------------------------------- 4577: * Arguments: gfdata (I) chardef * containing chardef for symbol 4578: * whose baseline is wanted 4579: * -------------------------------------------------------------------------- 4580: * Returns: ( int ) baseline for symdef, 4581: * or -1 for any error 4582: * -------------------------------------------------------------------------- 4583: * Notes: o Unlike TeX, the top-left corners of our rasters are (0,0), 4584: * with (row,col) increasing as you move down and right. 4585: * Baselines are calculated with respect to this scheme, 4586: * so 0 would mean the very top row is on the baseline 4587: * and everything else descends below the baseline. 4588: * ======================================================================= */ 4589: /* --- entry point --- */ 4590: int get_baseline ( chardef *gfdata ) 4591: { 4592: /* ------------------------------------------------------------------------- 4593: Allocations and Declarations 4594: -------------------------------------------------------------------------- */ 4595: int /*toprow = gfdata->toprow,*/ /*TeX top row from .gf file info*/ 4596: botrow = gfdata->botrow, /*TeX bottom row from .gf file info*/ 4597: height = gfdata->image.height; /* #rows comprising symbol */ 4598: /* ------------------------------------------------------------------------- 4599: give caller baseline 4600: -------------------------------------------------------------------------- */ 4601: return ( (height-1) + botrow ); /* note: descenders have botrow<0 */ 4602: } /* --- end-of-function get_baseline() --- */ 4603: 4604: 4605: /* ========================================================================== 4606: * Function: get_delim ( char *symbol, int height, int family ) 4607: * Purpose: returns subraster corresponding to the samllest 4608: * character containing symbol, but at least as large as height, 4609: * and in caller's family (if specified). 4610: * If no symbol character as large as height is available, 4611: * then the largest availabale character is returned instead. 4612: * -------------------------------------------------------------------------- 4613: * Arguments: symbol (I) char * containing (substring of) desired 4614: * symbol, e.g., if symbol="(", then any 4615: * mathchardef like "(" or "\\(", etc, match. 4616: * height (I) int containing minimum acceptable height 4617: * for returned character 4618: * family (I) int containing -1 to consider all families, 4619: * or, e.g., CMEX10 for only that family 4620: * -------------------------------------------------------------------------- 4621: * Returns: ( subraster * ) best matching character available, 4622: * or NULL for any error 4623: * -------------------------------------------------------------------------- 4624: * Notes: o If height is passed as negative, its absolute value is used 4625: * but the best-fit width is searched for (rather than height) 4626: * ======================================================================= */ 4627: /* --- entry point --- */ 4628: subraster *get_delim ( char *symbol, int height, int family ) 4629: { 4630: /* ------------------------------------------------------------------------- 4631: Allocations and Declarations 4632: -------------------------------------------------------------------------- */ 4633: mathchardef *symdefs = symtable; /* table of mathchardefs */ 4634: subraster *get_charsubraster(), *sp=(subraster *)NULL; /* best match char */ 4635: subraster *make_delim(); /* construct delim if can't find it*/ 4636: chardef *get_chardef(), *gfdata=NULL; /* get chardef struct for a symdef */ 4637: char lcsymbol[256], *symptr, /* lowercase symbol for comparison */ 4638: *unescsymbol = symbol; /* unescaped symbol */ 4639: int symlen = (symbol==NULL?0:strlen(symbol)), /* #chars in caller's sym*/ 4640: deflen = 0; /* length of symdef (aka lcsymbol) */ 4641: int idef = 0, /* symdefs[] index */ 4642: bestdef = (-9999), /* index of best fit symdef */ 4643: bigdef = (-9999); /*index of biggest (in case no best)*/ 4644: int size = 0, /* size index 0...LARGESTSIZE */ 4645: bestsize = (-9999), /* index of best fit size */ 4646: bigsize = (-9999); /*index of biggest (in case no best)*/ 4647: int defheight, bestheight=9999, /* height of best fit symdef */ 4648: bigheight = (-9999); /*height of biggest(in case no best)*/ 4649: int iswidth = 0; /* true if best-fit width desired */ 4650: int isunesc = 0, /* true if leading escape removed */ 4651: issq=0, isoint=0; /* true for \sqcup,etc, \oint,etc */ 4652: int iscurly = 0; /* true for StMary's curly symbols */ 4653: char *bigint="bigint", *bigoint="bigoint"; /* substitutes for int, oint */ 4654: /* ------------------------------------------------------------------------- 4655: determine if searching height or width, and search symdefs[] for best-fit 4656: -------------------------------------------------------------------------- */ 4657: /* --- arg checks --- */ 4658: if ( symlen < 1 ) return (sp); /* no input symbol suplied */ 4659: if ( strcmp(symbol,"e") == 0 ) return(sp); /* e causes segfault??? */ 4660: if ( strstr(symbol,"curly") != NULL ) iscurly=1; /* user wants curly delim */ 4661: /* --- ignore leading escapes for CMEX10 --- */ 4662: if ( 1 ) /* ignore leading escape */ 4663: if ( (family==CMEX10 || family==CMSYEX) ) { /* for CMEX10 or CMSYEX */ 4664: if ( strstr(symbol,"sq") != NULL ) /* \sq symbol requested */ 4665: issq = 1; /* seq \sq signal */ 4666: if ( strstr(symbol,"oint") != NULL ) /* \oint symbol requested */ 4667: isoint = 1; /* seq \oint signal */ 4668: if ( *symbol=='\\' ) /* have leading \ */ 4669: { unescsymbol = symbol+1; /* push past leading \ */ 4670: if ( --symlen < 1 ) return(sp); /* one less char */ 4671: if ( strcmp(unescsymbol,"int") == 0 ) /* \int requested by caller */ 4672: unescsymbol = bigint; /* but big version looks better */ 4673: if ( strcmp(unescsymbol,"oint") == 0 ) /* \oint requested by caller */ 4674: unescsymbol = bigoint; /* but big version looks better */ 4675: symlen = strlen(unescsymbol); /* explicitly recalculate length */ 4676: isunesc = 1; } /* signal leading escape removed */ 4677: } /* --- end-of-if(family) --- */ 4678: /* --- determine whether searching for best-fit height or width --- */ 4679: if ( height < 0 ) /* negative signals width search */ 4680: { height = (-height); /* flip "height" positive */ 4681: iswidth = 1; } /* set flag for width search */ 4682: /* --- search symdefs[] for best-fit height (or width) --- */ 4683: for ( idef=0; ;idef++ ) /* until trailer record found */ 4684: { 4685: char *defsym = symdefs[idef].symbol; /* local copies */ 4686: int deffam = symdefs[idef].family; 4687: if ( defsym == NULL ) break; /* reached end-of-table */ 4688: else /* check against caller's symbol */ 4689: if ( family<0 || deffam == family /* if explicitly in caller's family*/ 4690: || (family==CMSYEX && (deffam==CMSY10||deffam==CMEX10||deffam==STMARY10)) ) 4691: { 4692: strcpy(lcsymbol,defsym); /* local copy of symdefs[] symbol */ 4693: if ( isunesc && *lcsymbol=='\\' ) /* ignored leading \ in symbol */ 4694: {strsqueeze(lcsymbol,1);} /*so squeeze it out of lcsymbol too*/ 4695: if ( 0 ) /* don't ignore case */ 4696: for ( symptr=lcsymbol; *symptr!='\000'; symptr++ )/*for each symbol ch*/ 4697: if ( isalpha(*symptr) ) *symptr=tolower(*symptr);/*lowercase the char*/ 4698: deflen = strlen(lcsymbol); /* #chars in symbol we're checking */ 4699: if ((symptr=strstr(lcsymbol,unescsymbol)) != NULL) /*found caller's sym*/ 4700: if ( (isoint || strstr(lcsymbol,"oint")==NULL) /* skip unwanted "oint"*/ 4701: && (issq || strstr(lcsymbol,"sq")==NULL) ) /* skip unwanted "sq" */ 4702: if ( ( deffam == CMSY10 ? /* CMSY10 or not CMSY10 */ 4703: symptr == lcsymbol /* caller's sym is a prefix */ 4704: && deflen == symlen: /* and same length */ 4705: (iscurly || strstr(lcsymbol,"curly")==NULL) &&/*not unwanted curly*/ 4706: (symptr == lcsymbol /* caller's sym is a prefix */ 4707: || symptr == lcsymbol+deflen-symlen) ) ) /* or a suffix */ 4708: for ( size=0; size<=LARGESTSIZE; size++ ) /* check all font sizes */ 4709: if ( (gfdata=get_chardef(&(symdefs[idef]),size)) != NULL ) /*got one*/ 4710: { defheight = gfdata->image.height; /* height of this character */ 4711: if ( iswidth ) /* width search wanted instead... */ 4712: defheight = gfdata->image.width; /* ...so substitute width */ 4713: leftsymdef = &(symdefs[idef]); /* set symbol class, etc */ 4714: if ( defheight>=height && defheight<bestheight ) /*new best fit*/ 4715: { bestdef=idef; bestsize=size; /* save indexes of best fit */ 4716: bestheight = defheight; } /* and save new best height */ 4717: if ( defheight >= bigheight ) /* new biggest character */ 4718: { bigdef=idef; bigsize=size; /* save indexes of biggest */ 4719: bigheight = defheight; } /* and save new big height */ 4720: } /* --- end-of-if(gfdata!=NULL) --- */ 4721: } /* --- end-of-if(family) --- */ 4722: } /* --- end-of-for(idef) --- */ 4723: /* ------------------------------------------------------------------------- 4724: construct subraster for best fit character, and return it to caller 4725: -------------------------------------------------------------------------- */ 4726: if ( bestdef >= 0 ) /* found a best fit for caller */ 4727: sp = get_charsubraster(&(symdefs[bestdef]),bestsize); /* best subraster */ 4728: if ( (sp==NULL && height-bigheight>5) /* try to construct delim */ 4729: || bigdef < 0 ) /* delim not in font tables */ 4730: sp = make_delim(symbol,(iswidth?-height:height)); /* try to build delim */ 4731: if ( sp==NULL && bigdef>=0 ) /* just give biggest to caller */ 4732: sp = get_charsubraster(&(symdefs[bigdef]),bigsize); /* biggest subraster */ 4733: if ( msgfp!=NULL && msglevel>=99 ) 4734: fprintf(msgfp,"get_delim> symbol=%.50s, height=%d family=%d isokay=%s\n", 4735: (symbol==NULL?"null":symbol),height,family,(sp==NULL?"fail":"success")); 4736: return ( sp ); 4737: } /* --- end-of-function get_delim() --- */ 4738: 4739: 4740: /* ========================================================================== 4741: * Function: make_delim ( char *symbol, int height ) 4742: * Purpose: constructs subraster corresponding to symbol 4743: * exactly as large as height, 4744: * -------------------------------------------------------------------------- 4745: * Arguments: symbol (I) char * containing, e.g., if symbol="(" 4746: * for desired delimiter 4747: * height (I) int containing height 4748: * for returned character 4749: * -------------------------------------------------------------------------- 4750: * Returns: ( subraster * ) constructed delimiter 4751: * or NULL for any error 4752: * -------------------------------------------------------------------------- 4753: * Notes: o If height is passed as negative, its absolute value is used 4754: * and interpreted as width (rather than height) 4755: * ======================================================================= */ 4756: /* --- entry point --- */ 4757: subraster *make_delim ( char *symbol, int height ) 4758: { 4759: /* ------------------------------------------------------------------------- 4760: Allocations and Declarations 4761: -------------------------------------------------------------------------- */ 4762: subraster *sp = (subraster *)NULL, /* subraster returned to caller */ 4763: *new_subraster(); /* allocate subraster */ 4764: subraster *get_symsubraster(), /* look up delim pieces in cmex10 */ 4765: *symtop=NULL, *symbot=NULL, *symmid=NULL, *symbar=NULL, /* pieces */ 4766: *topsym=NULL, *botsym=NULL, *midsym=NULL, *barsym=NULL, /* +filler */ 4767: *rastack(), *rastcat(); /* stack pieces, concat filler */ 4768: int isdrawparen = 0; /*1=draw paren, 0=build from pieces*/ 4769: raster *rasp = (raster *)NULL; /* sp->image */ 4770: int isokay=0, delete_subraster(); /* set true if delimiter drawn ok */ 4771: int pixsz = 1, /* pixels are one bit each */ 4772: symsize = 0; /* size arg for get_symsubraster() */ 4773: int thickness = 1; /* drawn lines are one pixel thick */ 4774: int aspectratio = 8; /* default height/width for parens */ 4775: int iswidth = 0, /*true if width specified by height*/ 4776: width = height; /* #pixels width (e.g., of ellipse)*/ 4777: char *lp=NULL, *rp=NULL, /* check symbol for left or right */ 4778: *lp2=NULL, *rp2=NULL, /* synonym for lp,rp */ 4779: *lp3=NULL, *rp3=NULL, /* synonym for lp,rp */ 4780: *lp4=NULL, *rp4=NULL; /* synonym for lp,rp */ 4781: int circle_raster(), /* ellipse for ()'s in sp->image */ 4782: rule_rsater(), /* horizontal or vertical lines */ 4783: line_raster(); /* line between two points */ 4784: subraster *uparrow_subraster(); /* up/down arrows */ 4785: int isprealloc = 1; /*pre-alloc subraster, except arrow*/ 4786: int oldsmashmargin = smashmargin, /* save original smashmargin */ 4787: wasnocatspace = isnocatspace; /* save original isnocatspace */ 4788: /* ------------------------------------------------------------------------- 4789: initialization 4790: -------------------------------------------------------------------------- */ 4791: /* --- determine whether constructing height or width --- */ 4792: if ( height < 0 ) /* negative "height" signals width */ 4793: { width = height = (-height); /* flip height positive */ 4794: iswidth = 1; } /* set flag for width */ 4795: if ( height < 3 ) goto end_of_job; /* too small, must be error */ 4796: /* --- set default width (or height) accordingly --- */ 4797: if ( iswidth ) height = (width+(aspectratio+1)/2)/aspectratio; 4798: else width = (height+(aspectratio+1)/2)/aspectratio; 4799: if ( strchr(symbol,'=') != NULL /* left or right || bracket wanted */ 4800: || strstr(symbol,"\\|") != NULL /* same || in standard tex notation*/ 4801: || strstr(symbol,"dbl") != NULL ) /* semantic bracket with ||'s */ 4802: width = max2(width,6); /* need space between two |'s */ 4803: if ( width < 2 ) width=2; /* set min width */ 4804: if ( strchr(symbol,'(') != NULL /* if left ( */ 4805: || strchr(symbol,')') != NULL ) /* or right ) paren wanted */ 4806: { width = (3*width)/2; /* adjust width */ 4807: if ( !isdrawparen ) isprealloc=0; } /* don't prealloc if building */ 4808: if ( strchr(symbol,'/') != NULL /* left / */ 4809: || strstr(symbol,"\\\\") != NULL /* or \\ for right \ */ 4810: || strstr(symbol,"backsl") != NULL ) /* or \backslash for \ */ 4811: width = max2(height/3,5); 4812: if ( strstr(symbol,"arrow") != NULL ) /* arrow wanted */ 4813: { width = min2(height/3,20); /* adjust width */ 4814: isprealloc = 0; } /* don't preallocate subraster */ 4815: if ( strchr(symbol,'{') != NULL /* if left { */ 4816: || strchr(symbol,'}') != NULL ) /* or right } brace wanted */ 4817: { isprealloc = 0; } /* don't preallocate */ 4818: /* --- allocate and initialize subraster for constructed delimiter --- */ 4819: if ( isprealloc ) /* pre-allocation wanted */ 4820: { if ( (sp=new_subraster(width,height,pixsz)) /* allocate new subraster */ 4821: == NULL ) goto end_of_job; /* quit if failed */ 4822: /* --- initialize delimiter subraster parameters --- */ 4823: sp->type = IMAGERASTER; /* image */ 4824: sp->symdef = NULL; /* not applicable for image */ 4825: sp->baseline = height/2 + 2; /* is a little above center good? */ 4826: sp->size = NORMALSIZE; /* size (probably unneeded) */ 4827: rasp = sp->image; } /* pointer to image in subraster */ 4828: /* ------------------------------------------------------------------------- 4829: ( ) parens 4830: -------------------------------------------------------------------------- */ 4831: if ( (lp=strchr(symbol,'(')) != NULL /* left ( paren wanted */ 4832: || (rp=strchr(symbol,')')) != NULL ) /* right ) paren wanted */ 4833: { 4834: if ( isdrawparen ) { /* draw the paren */ 4835: int mywidth = min2(width,20); /* max width for ()'s */ 4836: circle_raster ( rasp, /* embedded raster image */ 4837: 0, 0, /* row0,col0 are upper-left corner */ 4838: height-1, mywidth-1, /* row1,col1 are lower-right */ 4839: thickness, /* line thickness is 1 pixel */ 4840: (rp==NULL?"23":"41") ); /* "1234" quadrants to be drawn */ 4841: isokay = 1; } /* set flag */ 4842: else { 4843: int isleft = (lp!=NULL?1:0); /* true for left, false for right */ 4844: char *parentop = (isleft?"\\leftparentop":"\\rightparentop"), 4845: *parenbot = (isleft?"\\leftparenbot":"\\rightparenbot"), 4846: *parenbar = (isleft?"\\leftparenbar":"\\rightparenbar"); 4847: int baseht=0, barht=0, /* height of base=top+bot, bar */ 4848: ibar=0, nbars=0; /* bar index, #bars between top&bot*/ 4849: int largestsize = min2(2,LARGESTSIZE), /* largest size for parens */ 4850: topfill=(isleft?0:0), botfill=(isleft?0:0), 4851: barfill=(isleft?0:7); /* alignment fillers */ 4852: /* --- get pieces at largest size smaller than total height --- */ 4853: for ( symsize=largestsize; symsize>=0; symsize-- ) /*largest to smallest*/ 4854: { 4855: /* --- get pieces at current test size --- */ 4856: isokay = 1; /* check for all pieces */ 4857: if ( (symtop=get_symsubraster(parentop,symsize)) == NULL ) isokay=0; 4858: if ( (symbot=get_symsubraster(parenbot,symsize)) == NULL ) isokay=0; 4859: if ( (symbar=get_symsubraster(parenbar,symsize)) == NULL ) isokay=0; 4860: /* --- check sum of pieces against total desired height --- */ 4861: if ( isokay ) { /* all pieces retrieved */ 4862: baseht = (symtop->image)->height + (symbot->image)->height; /*top+bot*/ 4863: barht = (symbar->image)->height; /* bar height */ 4864: if ( baseht < height+5 ) break; /* largest base that's not too big */ 4865: if ( symsize < 1 ) break; /* or smallest available base */ 4866: } /* --- end-of-if(isokay) --- */ 4867: /* --- free test pieces that were too big --- */ 4868: if ( symtop != NULL ) delete_subraster(symtop); /* free top */ 4869: if ( symbot != NULL ) delete_subraster(symbot); /* free bot */ 4870: if ( symbar != NULL ) delete_subraster(symbar); /* free bar */ 4871: isokay = 0; /* nothing available */ 4872: if ( symsize < 1 ) break; /* leave isokay=0 after smallest */ 4873: } /* --- end-of-for(symsize) --- */ 4874: /* --- construct brace from pieces --- */ 4875: if ( isokay ) { /* we have the pieces */ 4876: /* --- add alignment fillers --- */ 4877: smashmargin=0; isnocatspace=99; /*turn off rastcat smashing,space*/ 4878: topsym = (topfill>0?rastcat(new_subraster(topfill,1,1),symtop,3):symtop); 4879: botsym = (botfill>0?rastcat(new_subraster(botfill,1,1),symbot,3):symbot); 4880: barsym = (barfill>0?rastcat(new_subraster(barfill,1,1),symbar,3):symbar); 4881: smashmargin = oldsmashmargin; /* reset smashmargin */ 4882: isnocatspace = wasnocatspace; /* reset isnocatspace */ 4883: /* --- #bars needed between top and bot --- */ 4884: nbars = (barht<1?0:max2(0,1+(height-baseht)/barht)); /* #bars needed */ 4885: /* --- stack pieces --- */ 4886: sp = topsym; /* start with top piece */ 4887: if ( nbars > 0 ) /* need nbars between top and bot */ 4888: for ( ibar=1; ibar<=nbars; ibar++ ) sp = rastack(barsym,sp,1,0,0,2); 4889: sp = rastack(botsym,sp,1,0,0,3); /* bottom below bars or middle */ 4890: delete_subraster(barsym); /* barsym no longer needed */ 4891: } /* --- end-of-if(isokay) --- */ 4892: } /* --- end-of-if/else(isdrawparen) --- */ 4893: } /* --- end-of-if(left- or right-() paren wanted) --- */ 4894: /* ------------------------------------------------------------------------- 4895: { } braces 4896: -------------------------------------------------------------------------- */ 4897: else 4898: if ( (lp=strchr(symbol,'{')) != NULL /* left { brace wanted */ 4899: || (rp=strchr(symbol,'}')) != NULL ) /* right } brace wanted */ 4900: { 4901: int isleft = (lp!=NULL?1:0); /* true for left, false for right */ 4902: char *bracetop = (isleft?"\\leftbracetop":"\\rightbracetop"), 4903: *bracebot = (isleft?"\\leftbracebot":"\\rightbracebot"), 4904: *bracemid = (isleft?"\\leftbracemid":"\\rightbracemid"), 4905: *bracebar = (isleft?"\\leftbracebar":"\\rightbracebar"); 4906: int baseht=0, barht=0, /* height of base=top+bot+mid, bar */ 4907: ibar=0, nbars=0; /* bar index, #bars above,below mid*/ 4908: int largestsize = min2(2,LARGESTSIZE), /* largest size for braces */ 4909: topfill=(isleft?4:0), botfill=(isleft?4:0), 4910: midfill=(isleft?0:4), barfill=(isleft?4:4); /* alignment fillers */ 4911: /* --- get pieces at largest size smaller than total height --- */ 4912: for ( symsize=largestsize; symsize>=0; symsize-- ) /*largest to smallest*/ 4913: { 4914: /* --- get pieces at current test size --- */ 4915: isokay = 1; /* check for all pieces */ 4916: if ( (symtop=get_symsubraster(bracetop,symsize)) == NULL ) isokay=0; 4917: if ( (symbot=get_symsubraster(bracebot,symsize)) == NULL ) isokay=0; 4918: if ( (symmid=get_symsubraster(bracemid,symsize)) == NULL ) isokay=0; 4919: if ( (symbar=get_symsubraster(bracebar,symsize)) == NULL ) isokay=0; 4920: /* --- check sum of pieces against total desired height --- */ 4921: if ( isokay ) { /* all pieces retrieved */ 4922: baseht = (symtop->image)->height + (symbot->image)->height 4923: + (symmid->image)->height; /* top+bot+mid height */ 4924: barht = (symbar->image)->height; /* bar height */ 4925: if ( baseht < height+5 ) break; /* largest base that's not too big */ 4926: if ( symsize < 1 ) break; /* or smallest available base */ 4927: } /* --- end-of-if(isokay) --- */ 4928: /* --- free test pieces that were too big --- */ 4929: if ( symtop != NULL ) delete_subraster(symtop); /* free top */ 4930: if ( symbot != NULL ) delete_subraster(symbot); /* free bot */ 4931: if ( symmid != NULL ) delete_subraster(symmid); /* free mid */ 4932: if ( symbar != NULL ) delete_subraster(symbar); /* free bar */ 4933: isokay = 0; /* nothing available */ 4934: if ( symsize < 1 ) break; /* leave isokay=0 after smallest */ 4935: } /* --- end-of-for(symsize) --- */ 4936: /* --- construct brace from pieces --- */ 4937: if ( isokay ) { /* we have the pieces */ 4938: /* --- add alignment fillers --- */ 4939: smashmargin=0; isnocatspace=99; /*turn off rastcat smashing,space*/ 4940: topsym = (topfill>0?rastcat(new_subraster(topfill,1,1),symtop,3):symtop); 4941: botsym = (botfill>0?rastcat(new_subraster(botfill,1,1),symbot,3):symbot); 4942: midsym = (midfill>0?rastcat(new_subraster(midfill,1,1),symmid,3):symmid); 4943: barsym = (barfill>0?rastcat(new_subraster(barfill,1,1),symbar,3):symbar); 4944: smashmargin = oldsmashmargin; /* reset smashmargin */ 4945: isnocatspace = wasnocatspace; /* reset isnocatspace */ 4946: /* --- #bars needed on each side of mid piece --- */ 4947: nbars = (barht<1?0:max2(0,1+(height-baseht)/barht/2)); /*#bars per side*/ 4948: /* --- stack pieces --- */ 4949: sp = topsym; /* start with top piece */ 4950: if ( nbars > 0 ) /* need nbars above middle */ 4951: for ( ibar=1; ibar<=nbars; ibar++ ) sp = rastack(barsym,sp,1,0,0,2); 4952: sp = rastack(midsym,sp,1,0,0,3); /*mid after top or bars*/ 4953: if ( nbars > 0 ) /* need nbars below middle */ 4954: for ( ibar=1; ibar<=nbars; ibar++ ) sp = rastack(barsym,sp,1,0,0,2); 4955: sp = rastack(botsym,sp,1,0,0,3); /* bottom below bars or middle */ 4956: delete_subraster(barsym); /* barsym no longer needed */ 4957: } /* --- end-of-if(isokay) --- */ 4958: } /* --- end-of-if(left- or right-{} brace wanted) --- */ 4959: /* ------------------------------------------------------------------------- 4960: [ ] brackets 4961: -------------------------------------------------------------------------- */ 4962: else 4963: if ( (lp=strchr(symbol,'[')) != NULL /* left [ bracket wanted */ 4964: || (rp=strchr(symbol,']')) != NULL /* right ] bracket wanted */ 4965: || (lp2=strstr(symbol,"lceil")) != NULL /* left ceiling wanted */ 4966: || (rp2=strstr(symbol,"rceil")) != NULL /* right ceiling wanted */ 4967: || (lp3=strstr(symbol,"lfloor")) != NULL /* left floor wanted */ 4968: || (rp3=strstr(symbol,"rfloor")) != NULL /* right floor wanted */ 4969: || (lp4=strstr(symbol,"llbrack")) != NULL /* left semantic bracket */ 4970: || (rp4=strstr(symbol,"rrbrack")) != NULL ) /* right semantic bracket */ 4971: { 4972: /* --- use rule_raster ( rasp, top, left, width, height, type=0 ) --- */ 4973: int mywidth = min2(width,12), /* max width for horizontal bars */ 4974: wthick = 1; /* thickness of top.bottom bars */ 4975: thickness = (height<25?1:2); /* set lines 1 or 2 pixels thick */ 4976: if ( lp2!=NULL || rp2!=NULL || lp3!=NULL || rp3 !=NULL ) /*ceil or floor*/ 4977: wthick = thickness; /* same thickness for top/bot bar */ 4978: if ( lp3==NULL && rp3==NULL ) /* set top bar if floor not wanted */ 4979: rule_raster(rasp, 0,0, mywidth,wthick, 0); /* top horizontal bar */ 4980: if ( lp2==NULL && rp2==NULL ) /* set bot bar if ceil not wanted */ 4981: rule_raster(rasp, height-wthick,0, mywidth,thickness, 0); /* bottom */ 4982: if ( lp!=NULL || lp2!=NULL || lp3!=NULL || lp4!=NULL ) /* left bracket */ 4983: rule_raster(rasp, 0,0, thickness,height, 0); /* left vertical bar */ 4984: if ( lp4 != NULL ) /* 2nd left vertical bar needed */ 4985: rule_raster(rasp, 0,thickness+1, 1,height, 0); /* 2nd left vertical bar */ 4986: if ( rp!=NULL || rp2!=NULL || rp3!=NULL || rp4!=NULL ) /* right bracket */ 4987: rule_raster(rasp, 0,mywidth-thickness, thickness,height, 0); /* right */ 4988: if ( rp4 != NULL ) /* 2nd right vertical bar needed */ 4989: rule_raster(rasp, 0,mywidth-thickness-2, 1,height, 0); /*2nd right vert*/ 4990: isokay = 1; /* set flag */ 4991: } /* --- end-of-if(left- or right-[] bracket wanted) --- */ 4992: /* ------------------------------------------------------------------------- 4993: < > brackets 4994: -------------------------------------------------------------------------- */ 4995: else 4996: if ( (lp=strchr(symbol,'<')) != NULL /* left < bracket wanted */ 4997: || (rp=strchr(symbol,'>')) != NULL ) /* right > bracket wanted */ 4998: { 4999: /* --- use line_raster( rasp, row0, col0, row1, col1, thickness ) --- */ 5000: int mywidth = min2(width,12), /* max width for brackets */ 5001: mythick = 1; /* all lines one pixel thick */ 5002: thickness = (height<25?1:2); /* set line pixel thickness */ 5003: if ( lp != NULL ) /* left < bracket wanted */ 5004: { line_raster(rasp,height/2,0,0,mywidth-1,mythick); 5005: if ( thickness>1 ) 5006: line_raster(rasp,height/2,1,0,mywidth-1,mythick); 5007: line_raster(rasp,height/2,0,height-1,mywidth-1,mythick); 5008: if ( thickness>1 ) 5009: line_raster(rasp,height/2,1,height-1,mywidth-1,mythick); } 5010: if ( rp != NULL ) /* right > bracket wanted */ 5011: { line_raster(rasp,height/2,mywidth-1,0,0,mythick); 5012: if ( thickness>1 ) 5013: line_raster(rasp,height/2,mywidth-2,0,0,mythick); 5014: line_raster(rasp,height/2,mywidth-1,height-1,0,mythick); 5015: if ( thickness>1 ) 5016: line_raster(rasp,height/2,mywidth-2,height-1,0,mythick); } 5017: isokay = 1; /* set flag */ 5018: } /* --- end-of-if(left- or right-<> bracket wanted) --- */ 5019: /* ------------------------------------------------------------------------- 5020: / \ delimiters 5021: -------------------------------------------------------------------------- */ 5022: else 5023: if ( (lp=strchr(symbol,'/')) != NULL /* left / wanted */ 5024: || (rp=strstr(symbol,"\\\\")) != NULL /* right \ wanted */ 5025: || (rp2=strstr(symbol,"backsl")) != NULL ) /* right \ wanted */ 5026: { 5027: /* --- use line_raster( rasp, row0, col0, row1, col1, thickness ) --- */ 5028: int mywidth = width; /* max width for / \ */ 5029: thickness = 1; /* set line pixel thickness */ 5030: if ( lp != NULL ) /* left / wanted */ 5031: line_raster(rasp,0,mywidth-1,height-1,0,thickness); 5032: if ( rp!=NULL || rp2!=NULL ) /* right \ wanted */ 5033: line_raster(rasp,0,0,height-1,mywidth-1,thickness); 5034: isokay = 1; /* set flag */ 5035: } /* --- end-of-if(left- or right-/\ delimiter wanted) --- */ 5036: /* ------------------------------------------------------------------------- 5037: arrow delimiters 5038: -------------------------------------------------------------------------- */ 5039: else 5040: if ( strstr(symbol,"arrow") != NULL ) /* arrow delimiter wanted */ 5041: { 5042: /* --- use uparrow_subraster(width,height,pixsz,drctn,isBig) --- */ 5043: int mywidth = width; /* max width for / \ */ 5044: int isBig = (strstr(symbol,"Up")!=NULL /* isBig if we have an Up */ 5045: || strstr(symbol,"Down")!=NULL); /* or a Down */ 5046: int drctn = +1; /* init for uparrow */ 5047: if ( strstr(symbol,"down")!=NULL /* down if we have down */ 5048: || strstr(symbol,"Down")!=NULL ) /* or Down */ 5049: { drctn = (-1); /* reset direction to down */ 5050: if ( strstr(symbol,"up")!=NULL /* updown if we have up or Up */ 5051: || strstr(symbol,"Up")!=NULL ) /* and down or Down */ 5052: drctn = 0; } /* reset direction to updown */ 5053: sp = uparrow_subraster(mywidth,height,pixsz,drctn,isBig); 5054: if ( sp != NULL ) 5055: { sp->type = IMAGERASTER; /* image */ 5056: sp->symdef = NULL; /* not applicable for image */ 5057: sp->baseline = height/2 + 2; /* is a little above center good? */ 5058: sp->size = NORMALSIZE; /* size (probably unneeded) */ 5059: isokay = 1; } /* set flag */ 5060: } /* --- end-of-if(arrow delimiter wanted) --- */ 5061: /* ------------------------------------------------------------------------- 5062: \- for | | brackets or \= for || || brackets 5063: -------------------------------------------------------------------------- */ 5064: else 5065: if ( (lp=strchr(symbol,'-')) != NULL /* left or right | bracket wanted */ 5066: || (lp2=strchr(symbol,'|')) != NULL /* synonym for | bracket */ 5067: || (rp=strchr(symbol,'=')) != NULL /* left or right || bracket wanted */ 5068: || (rp2=strstr(symbol,"\\|"))!= NULL ) /* || in standard tex notation */ 5069: { 5070: /* --- rule_raster ( rasp, top, left, width, height, type=0 ) --- */ 5071: int midcol = width/2; /* middle col, left of mid if even */ 5072: if ( rp != NULL /* left or right || bracket wanted */ 5073: || rp2 != NULL ) /* or || in standard tex notation */ 5074: { thickness = (height<75?1:2); /* each | of || 1 or 2 pixels thick*/ 5075: rule_raster(rasp, 0,max2(0,midcol-2), thickness,height, 0); /* left */ 5076: rule_raster(rasp, 0,min2(width,midcol+2), thickness,height, 0); } 5077: else /*nb, lp2 spuriously set if rp2 set*/ 5078: if ( lp != NULL /* left or right | bracket wanted */ 5079: || lp2 != NULL ) /* ditto for synomym */ 5080: { thickness = (height<75?1:2); /* set | 1 or 2 pixels thick */ 5081: rule_raster(rasp, 0,midcol, thickness,height, 0); } /*mid vertical bar*/ 5082: isokay = 1; /* set flag */ 5083: } /* --- end-of-if(left- or right-[] bracket wanted) --- */ 5084: /* ------------------------------------------------------------------------- 5085: back to caller 5086: -------------------------------------------------------------------------- */ 5087: end_of_job: 5088: if ( msgfp!=NULL && msglevel>=99 ) 5089: fprintf(msgfp,"make_delim> symbol=%.50s, isokay=%d\n", 5090: (symbol==NULL?"null":symbol),isokay); 5091: if ( !isokay ) /* don't have requested delimiter */ 5092: { if (sp!=NULL) delete_subraster(sp); /* so free unneeded structure */ 5093: sp = NULL; } /* and signal error to caller */ 5094: return ( sp ); /*back to caller with delim or NULL*/ 5095: } /* --- end-of-function make_delim() --- */ 5096: 5097: 5098: /* ========================================================================== 5099: * Function: texchar ( expression, chartoken ) 5100: * Purpose: scans expression, returning either its first character, 5101: * or the next \sequence if that first char is \, 5102: * and a pointer to the first expression char past that. 5103: * -------------------------------------------------------------------------- 5104: * Arguments: expression (I) char * to first char of null-terminated 5105: * string containing valid LaTeX expression 5106: * to be scanned 5107: * chartoken (O) char * to null-terminated string returning 5108: * either the first (non-whitespace) character 5109: * of expression if that char isn't \, or else 5110: * the \ and everything following it up to 5111: * the next non-alphabetic character (but at 5112: * least one char following the \ even if 5113: * it's non-alpha) 5114: * -------------------------------------------------------------------------- 5115: * Returns: ( char * ) ptr to the first char of expression 5116: * past returned chartoken, 5117: * or NULL for any parsing error. 5118: * -------------------------------------------------------------------------- 5119: * Notes: o Does *not* skip leading whitespace, but simply 5120: * returns any whitespace character as the next character. 5121: * ======================================================================= */ 5122: /* --- entry point --- */ 5123: char *texchar ( char *expression, char *chartoken ) 5124: { 5125: /* ------------------------------------------------------------------------- 5126: Allocations and Declarations 5127: -------------------------------------------------------------------------- */ 5128: int esclen = 0, /*length of escape sequence*/ 5129: maxesclen = 128; /* max len of esc sequence */ 5130: char *ptoken = chartoken; /* ptr into chartoken */ 5131: int iprefix = 0; /* prefix index */ 5132: static char *prefixes[] = /*e.g., \big followed by ( */ 5133: { /* "\\left", "\\right", */ 5134: "\\big", "\\Big", "\\bigg", "\\Bigg", 5135: "\\bigl", "\\Bigl", "\\biggl", "\\Biggl", 5136: "\\bigr", "\\Bigr", "\\biggr", "\\Biggr", NULL }; 5137: static char *starred[] = /* may be followed by * */ 5138: { "\\hspace", "\\!", NULL }; 5139: /* ------------------------------------------------------------------------- 5140: just return the next char if it's not \ 5141: -------------------------------------------------------------------------- */ 5142: /* --- error check for end-of-string --- */ 5143: *ptoken = '\000'; /* init in case of error */ 5144: if ( expression == NULL ) return(NULL); /* nothing to scan */ 5145: if ( *expression == '\000' ) return(NULL); /* nothing to scan */ 5146: /* --- always returning first character (either \ or some other char) --- */ 5147: *ptoken++ = *expression++; /* here's first character */ 5148: /* --- if first char isn't \, then just return it to caller --- */ 5149: if ( !isthischar(*(expression-1),ESCAPE) ) /* not a \, so return char */ 5150: { *ptoken = '\000'; /* add a null terminator */ 5151: goto end_of_job; } /* ptr past returned char */ 5152: if ( *expression == '\000' ) /* \ is very last char */ 5153: { *chartoken = '\000'; /* flush bad trailing \ */ 5154: return(NULL); } /* and signal end-of-job */ 5155: /* ------------------------------------------------------------------------- 5156: we have an escape sequence, so return all alpha chars following \ 5157: -------------------------------------------------------------------------- */ 5158: /* --- accumulate chars until first non-alpha char found --- */ 5159: for ( ; isalpha(*expression); esclen++ ) /* till first non-alpha... */ 5160: { if ( esclen < maxesclen-3 ) /* more room in chartoken */ 5161: *ptoken++ = *expression; /*copy alpha char, bump ptr*/ 5162: expression++; } /* bump expression ptr */ 5163: /* --- if we have a prefix, append next texchar, e.g., \big( --- */ 5164: *ptoken = '\000'; /* set null for compare */ 5165: for ( iprefix=0; prefixes[iprefix] != NULL; iprefix++ ) /* run thru list */ 5166: if ( strcmp(chartoken,prefixes[iprefix]) == 0 ) /* have an exact match */ 5167: { char nextchar[256]; int nextlen=0; /* texchar after prefix */ 5168: skipwhite(expression); /* skip space after prefix*/ 5169: expression = texchar(expression,nextchar); /* get nextchar */ 5170: if ( (nextlen = strlen(nextchar)) > 0 ) /* #chars in nextchar */ 5171: { strcpy(ptoken,nextchar); /* append nextchar */ 5172: ptoken += strlen(nextchar); /* point to null terminator*/ 5173: esclen += strlen(nextchar); } /* and bump escape length */ 5174: break; } /* stop checking prefixes */ 5175: /* --- every \ must be followed by at least one char, e.g., \[ --- */ 5176: if ( esclen < 1 ) /* \ followed by non-alpha */ 5177: *ptoken++ = *expression++; /*copy non-alpha, bump ptrs*/ 5178: *ptoken = '\000'; /* null-terminate token */ 5179: /* --- check for \hspace* or other starred commands --- */ 5180: for ( iprefix=0; starred[iprefix] != NULL; iprefix++ ) /* run thru list */ 5181: if ( strcmp(chartoken,starred[iprefix]) == 0 ) /* have an exact match */ 5182: if ( *expression == '*' ) /* follows by a * */ 5183: { *ptoken++ = *expression++; /* copy * and bump ptr */ 5184: *ptoken = '\000'; /* null-terminate token */ 5185: break; } /* stop checking */ 5186: /* --- respect spaces in text mode, except first space after \escape --- */ 5187: if ( esclen >= 1 ) { /*only for alpha \sequences*/ 5188: if ( istextmode ) /* in \rm or \it text mode */ 5189: if ( isthischar(*expression,WHITEDELIM) ) /* delim follows \sequence */ 5190: expression++; } /* so flush delim */ 5191: /* --- back to caller --- */ 5192: end_of_job: 5193: if ( msgfp!=NULL && msglevel>=999 ) 5194: { fprintf(msgfp,"texchar> returning token = \"%s\"\n",chartoken); 5195: fflush(msgfp); } 5196: return ( expression ); /*ptr to 1st non-alpha char*/ 5197: } /* --- end-of-function texchar() --- */ 5198: 5199: 5200: /* ========================================================================== 5201: * Function: texsubexpr (expression,subexpr,maxsubsz, 5202: * left,right,isescape,isdelim) 5203: * Purpose: scans expression, returning everything between a balanced 5204: * left{...right} subexpression if the first non-whitespace 5205: * char of expression is an (escaped or unescaped) left{, 5206: * or just the next texchar() otherwise, 5207: * and a pointer to the first expression char past that. 5208: * -------------------------------------------------------------------------- 5209: * Arguments: expression (I) char * to first char of null-terminated 5210: * string containing valid LaTeX expression 5211: * to be scanned 5212: * subexpr (O) char * to null-terminated string returning 5213: * either everything between a balanced {...} 5214: * subexpression if the first char is {, 5215: * or the next texchar() otherwise. 5216: * maxsubsz (I) int containing max #bytes returned 5217: * in subexpr buffer (0 means unlimited) 5218: * left (I) char * specifying allowable left delimiters 5219: * that begin subexpression, e.g., "{[(<" 5220: * right (I) char * specifying matching right delimiters 5221: * in the same order as left, e.g., "}])>" 5222: * isescape (I) int controlling whether escaped and/or 5223: * unescaped left,right are matched; 5224: * see isbrace() comments below for details. 5225: * isdelim (I) int containing true (non-zero) to return 5226: * the leading left and trailing right delims 5227: * (if any were found) along with subexpr, 5228: * or containing false=0 to return subexpr 5229: * without its delimiters 5230: * -------------------------------------------------------------------------- 5231: * Returns: ( char * ) ptr to the first char of expression 5232: * past returned subexpr (see Notes), 5233: * or NULL for any parsing error. 5234: * -------------------------------------------------------------------------- 5235: * Notes: o If subexpr is of the form left{...right}, 5236: * the outer {}'s are returned as part of subexpr 5237: * if isdelim is true; if isdelim is false the {}'s aren't 5238: * returned. In either case the returned pointer is 5239: * *always* bumped past the closing right}, even if 5240: * that closing right} isn't returned in subexpr. 5241: * o If subexpr is not of the form left{...right}, 5242: * the returned pointer is on the character immediately 5243: * following the last character returned in subexpr 5244: * o \. acts as LaTeX \right. and matches any \left( 5245: * And it also acts as a LaTeX \left. and matches any \right) 5246: * ======================================================================= */ 5247: /* --- entry point --- */ 5248: char *texsubexpr ( char *expression, char *subexpr, int maxsubsz, 5249: char *left, char *right, int isescape, int isdelim ) 5250: { 5251: /* ------------------------------------------------------------------------- 5252: Allocations and Declarations 5253: -------------------------------------------------------------------------- */ 5254: char *texchar(); /*next char (or \sequence) from expression*/ 5255: char *leftptr, leftdelim[256] = "(\000", /* left( found in expression */ 5256: rightdelim[256] = ")\000"; /* and matching right) */ 5257: char *origexpression=expression, *origsubexpr=subexpr; /*original inputs*/ 5258: char *strtexchr(), *texleft(); /* check for \left, and get it */ 5259: int gotescape = 0, /* true if leading char of expression is \ */ 5260: prevescape = 0; /* while parsing, true if preceding char \ */ 5261: int isbrace(); /* check for left,right braces */ 5262: int isanyright = 1; /* true matches any right with left, (...] */ 5263: int isleftdot = 0; /* true if left brace is a \. */ 5264: int nestlevel = 1; /* current # of nested braces */ 5265: int subsz=0 /*,maxsubsz=MAXSUBXSZ*/; /*#chars in returned subexpr buffer*/ 5266: /* ------------------------------------------------------------------------- 5267: skip leading whitespace and just return the next char if it's not { 5268: -------------------------------------------------------------------------- */ 5269: /* --- skip leading whitespace and error check for end-of-string --- */ 5270: *subexpr = '\000'; /* init in case of error */ 5271: if ( expression == NULL ) return(NULL); /*can't dereference null ptr*/ 5272: skipwhite(expression); /* leading whitespace gone */ 5273: if ( *expression == '\000' ) return(NULL); /* nothing left to scan */ 5274: /* --- set maxsubsz --- */ 5275: if ( maxsubsz < 1 ) maxsubsz = MAXSUBXSZ-2; /* input 0 means unlimited */ 5276: /* --- check for escape --- */ 5277: if ( isthischar(*expression,ESCAPE) ) /* expression is escaped */ 5278: gotescape = 1; /* so set flag accordingly */ 5279: /* --- check for \left...\right --- */ 5280: if ( gotescape ) /* begins with \ */ 5281: if ( memcmp(expression+1,"left",4) ) /* and followed by left */ 5282: if ( strchr(left,'l') != NULL ) /* caller wants \left's */ 5283: if ( strtexchr(expression,"\\left") == expression ) /*expression=\left...*/ 5284: { char *pright = texleft(expression,subexpr,maxsubsz, /* find ...\right*/ 5285: (isdelim?NULL:leftdelim),rightdelim); 5286: if ( isdelim ) strcat(subexpr,rightdelim); /* caller wants delims */ 5287: return ( pright ); /*back to caller past \right*/ 5288: } /* --- end-of-if(expression=="\\left") --- */ 5289: /* --- if first char isn't left{ or script, just return it to caller --- */ 5290: if ( !isbrace(expression,left,isescape) ) { /* not a left{ */ 5291: if ( !isthischar(*expression,SCRIPTS) ) /* and not a script */ 5292: return ( texchar(expression,subexpr) ); /* next char to caller */ 5293: else /* --- kludge for super/subscripts to accommodate texscripts() --- */ 5294: { *subexpr++ = *expression; /* signal script */ 5295: *subexpr = '\000'; /* null-terminate subexpr */ 5296: return ( expression ); } } /* leave script in stream */ 5297: /* --- extract left and find matching right delimiter --- */ 5298: *leftdelim = *(expression+gotescape); /* the left( in expression */ 5299: if ( (gotescape && *leftdelim == '.') /* we have a left \. */ 5300: || (gotescape && isanyright) ) /*or are matching any right*/ 5301: { isleftdot = 1; /* so just set flag */ 5302: *leftdelim = '\000'; } /* and reset leftdelim */ 5303: else /* find matching \right */ 5304: if ( (leftptr=strchr(left,*leftdelim)) != NULL ) /* ptr to that left( */ 5305: *rightdelim = right[(int)(leftptr-left)]; /* get the matching right) */ 5306: else /* can't happen -- pgm bug */ 5307: return ( NULL ); /*just signal eoj to caller*/ 5308: /* ------------------------------------------------------------------------- 5309: accumulate chars between balanced {}'s, i.e., till nestlevel returns to 0 5310: -------------------------------------------------------------------------- */ 5311: /* --- first initialize by bumping past left{ or \{ --- */ 5312: if ( isdelim ) *subexpr++ = *expression++; /*caller wants { in subexpr*/ 5313: else expression++; /* always bump past left{ */ 5314: if ( gotescape ) { /*need to bump another char*/ 5315: if ( isdelim ) *subexpr++ = *expression++; /* caller wants char, too */ 5316: else expression++; } /* else just bump past it */ 5317: /* --- set maximum size for numerical arguments --- */ 5318: if ( 0 ) /* check turned on or off? */ 5319: if ( !isescape && !isdelim ) /*looking for numerical arg*/ 5320: maxsubsz = 96; /* set max arg size */ 5321: /* --- search for matching right} --- */ 5322: while ( 1 ) /*until balanced right} */ 5323: { 5324: /* --- error check for end-of-string --- */ 5325: if ( *expression == '\000' ) /* premature end-of-string */ 5326: { if ( 0 && (!isescape && !isdelim) ) /*looking for numerical arg,*/ 5327: { expression = origexpression; /* so end-of-string is error*/ 5328: subexpr = origsubexpr; } /* so reset all ptrs */ 5329: if ( isdelim ) { /* generate fake right */ 5330: if ( gotescape ) /* need escaped right */ 5331: { *subexpr++ = '\\'; /* set escape char */ 5332: *subexpr++ = '.'; } /* and fake \right. */ 5333: else /* escape not wanted */ 5334: *subexpr++ = *rightdelim; } /* so fake actual right */ 5335: *subexpr = '\000'; /* null-terminate subexpr */ 5336: return ( expression ); } /* back with final token */ 5337: /* --- check preceding char for escape --- */ 5338: if ( isthischar(*(expression-1),ESCAPE) ) /* previous char was \ */ 5339: prevescape = 1-prevescape; /* so flip escape flag */ 5340: else prevescape = 0; /* or turn flag off */ 5341: /* --- check for { and } (un/escaped as per leading left) --- */ 5342: if ( gotescape == prevescape ) /* escaped iff leading is */ 5343: { /* --- check for (closing) right delim and see if we're done --- */ 5344: if ( isthischar(*expression,rightdelim) /* found a right} */ 5345: || (isleftdot && isthischar(*expression,right)) /*\left. matches all*/ 5346: || (prevescape && isthischar(*expression,".")) ) /*or found \right. */ 5347: if ( --nestlevel < 1 ) /*\right balances 1st \left*/ 5348: { if ( isdelim ) /*caller wants } in subexpr*/ 5349: *subexpr++ = *expression; /* so end subexpr with } */ 5350: else /*check for \ before right}*/ 5351: if ( prevescape ) /* have unwanted \ */ 5352: *(subexpr-1) = '\000'; /* so replace it with null */ 5353: *subexpr = '\000'; /* null-terminate subexpr */ 5354: return ( expression+1 ); } /* back with char after } */ 5355: /* --- check for (another) left{ --- */ 5356: if ( isthischar(*expression,leftdelim) /* found another left{ */ 5357: || (isleftdot && isthischar(*expression,left)) ) /* any left{ */ 5358: nestlevel++; 5359: } /* --- end-of-if(gotescape==prevescape) --- */ 5360: /* --- not done, so copy char to subexpr and continue with next char --- */ 5361: if ( ++subsz < maxsubsz-5 ) /* more room in subexpr */ 5362: *subexpr++ = *expression; /* so copy char and bump ptr*/ 5363: expression++; /* bump expression ptr */ 5364: } /* --- end-of-while(1) --- */ 5365: } /* --- end-of-function texsubexpr() --- */ 5366: 5367: 5368: /* ========================================================================== 5369: * Function: texleft (expression,subexpr,maxsubsz,ldelim,rdelim) 5370: * Purpose: scans expression, starting after opening \left, 5371: * and returning ptr after matching closing \right. 5372: * Everything between is returned in subexpr, if given. 5373: * Likewise, if given, ldelim returns delimiter after \left 5374: * and rdelim returns delimiter after \right. 5375: * If ldelim is given, the returned subexpr doesn't include it. 5376: * If rdelim is given, the returned pointer is after that delim. 5377: * -------------------------------------------------------------------------- 5378: * Arguments: expression (I) char * to first char of null-terminated 5379: * string immediately following opening \left 5380: * subexpr (O) char * to null-terminated string returning 5381: * either everything between balanced 5382: * \left ... \right. If leftdelim given, 5383: * subexpr does _not_ contain that delimiter. 5384: * maxsubsz (I) int containing max #bytes returned 5385: * in subexpr buffer (0 means unlimited) 5386: * ldelim (O) char * returning delimiter following 5387: * opening \left 5388: * rdelim (O) char * returning delimiter following 5389: * closing \right 5390: * -------------------------------------------------------------------------- 5391: * Returns: ( char * ) ptr to the first char of expression 5392: * past closing \right, or past closing 5393: * right delimiter if rdelim!=NULL, 5394: * or NULL for any error. 5395: * -------------------------------------------------------------------------- 5396: * Notes: o 5397: * ======================================================================= */ 5398: /* --- entry point --- */ 5399: char *texleft ( char *expression, char *subexpr, int maxsubsz, 5400: char *ldelim, char *rdelim ) 5401: { 5402: /* ------------------------------------------------------------------------- 5403: Allocations and Declarations 5404: -------------------------------------------------------------------------- */ 5405: char *texchar(), /* get delims after \left,\right */ 5406: *strtexchr(), *pright=expression; /* locate matching \right */ 5407: static char left[16]="\\left", right[16]="\\right"; /* tex delimiters */ 5408: int sublen = 0; /* #chars between \left...\right */ 5409: /* ------------------------------------------------------------------------- 5410: initialization 5411: -------------------------------------------------------------------------- */ 5412: /* --- init output --- */ 5413: if ( subexpr != NULL ) *subexpr = '\000'; /* init subexpr, if given */ 5414: if ( ldelim != NULL ) *ldelim = '\000'; /* init ldelim, if given */ 5415: if ( rdelim != NULL ) *rdelim = '\000'; /* init rdelim, if given */ 5416: /* --- check args --- */ 5417: if ( expression == NULL ) goto end_of_job; /* no input supplied */ 5418: if ( *expression == '\000' ) goto end_of_job; /* nothing after \left */ 5419: /* --- determine left delimiter --- */ 5420: if ( ldelim != NULL ) /* caller wants left delim */ 5421: { skipwhite(expression); /* interpret \left ( as \left( */ 5422: expression = texchar(expression,ldelim); } /*delim from expression*/ 5423: /* ------------------------------------------------------------------------- 5424: locate \right balancing opening \left 5425: -------------------------------------------------------------------------- */ 5426: /* --- first \right following \left --- */ 5427: if ( (pright=strtexchr(expression,right)) /* look for \right after \left */ 5428: != NULL ) { /* found it */ 5429: /* --- find matching \right by pushing past any nested \left's --- */ 5430: char *pleft = expression; /* start after first \left( */ 5431: while ( 1 ) { /*break when matching \right found*/ 5432: /* -- locate next nested \left if there is one --- */ 5433: if ( (pleft=strtexchr(pleft,left)) /* find next \left */ 5434: == NULL ) break; /*no more, so matching \right found*/ 5435: pleft += strlen(left); /* push ptr past \left token */ 5436: if ( pleft >= pright ) break; /* not nested if \left after \right*/ 5437: /* --- have nested \left, so push forward to next \right --- */ 5438: if ( (pright=strtexchr(pright+strlen(right),right)) /* find next \right */ 5439: == NULL ) break; /* ran out of \right's */ 5440: } /* --- end-of-while(1) --- */ 5441: } /* --- end-of-if(pright!=NULL) --- */ 5442: /* --- set subexpression length, push pright past \right --- */ 5443: if ( pright != (char *)NULL ) /* found matching \right */ 5444: { sublen = (int)(pright-expression); /* #chars between \left...\right */ 5445: pright += strlen(right); } /* so push pright past \right */ 5446: /* ------------------------------------------------------------------------- 5447: get rightdelim and subexpr between \left...\right 5448: -------------------------------------------------------------------------- */ 5449: /* --- get delimiter following \right --- */ 5450: if ( rdelim != NULL ) { /* caller wants right delim */ 5451: if ( pright == (char *)NULL ) /* assume \right. at end of exprssn*/ 5452: { strcpy(rdelim,"."); /* set default \right. */ 5453: sublen = strlen(expression); /* use entire remaining expression */ 5454: pright = expression + sublen; } /* and push pright to end-of-string*/ 5455: else /* have explicit matching \right */ 5456: { skipwhite(pright); /* interpret \right ) as \right) */ 5457: pright = texchar(pright,rdelim); /* pull delim from expression */ 5458: if ( *rdelim == '\000' ) strcpy(rdelim,"."); } } /* or set \right. */ 5459: /* --- get subexpression between \left...\right --- */ 5460: if ( sublen > 0 ) /* have subexpr */ 5461: if ( subexpr != NULL ) { /* and caller wants it */ 5462: if ( maxsubsz > 0 ) sublen = min2(sublen,maxsubsz-1); /* max buffer size */ 5463: memcpy(subexpr,expression,sublen); /* stuff between \left...\right */ 5464: subexpr[sublen] = '\000'; } /* null-terminate subexpr */ 5465: end_of_job: 5466: if ( msglevel>=99 && msgfp!=NULL ) 5467: { fprintf(msgfp,"texleft> ldelim=%s, rdelim=%s, subexpr=%.128s\n", 5468: (ldelim==NULL?"none":ldelim),(rdelim==NULL?"none":rdelim), 5469: (subexpr==NULL?"none":subexpr)); fflush(msgfp); } 5470: return ( pright ); 5471: } /* --- end-of-function texleft --- */ 5472: 5473: 5474: /* ========================================================================== 5475: * Function: texscripts ( expression, subscript, superscript, which ) 5476: * Purpose: scans expression, returning subscript and/or superscript 5477: * if expression is of the form _x^y or ^{x}_{y}, 5478: * or any (valid LaTeX) permutation of the above, 5479: * and a pointer to the first expression char past "scripts" 5480: * -------------------------------------------------------------------------- 5481: * Arguments: expression (I) char * to first char of null-terminated 5482: * string containing valid LaTeX expression 5483: * to be scanned 5484: * subscript (O) char * to null-terminated string returning 5485: * subscript (without _), if found, or "\000" 5486: * superscript (O) char * to null-terminated string returning 5487: * superscript (without ^), if found, or "\000" 5488: * which (I) int containing 1 for subscript only, 5489: * 2 for superscript only, >=3 for either/both 5490: * -------------------------------------------------------------------------- 5491: * Returns: ( char * ) ptr to the first char of expression 5492: * past returned "scripts" (unchanged 5493: * except for skipped whitespace if 5494: * neither subscript nor superscript found), 5495: * or NULL for any parsing error. 5496: * -------------------------------------------------------------------------- 5497: * Notes: o an input expression like ^a^b_c will return superscript="b", 5498: * i.e., totally ignoring all but the last "script" encountered 5499: * ======================================================================= */ 5500: /* --- entry point --- */ 5501: char *texscripts ( char *expression, char *subscript, 5502: char *superscript, int which ) 5503: { 5504: /* ------------------------------------------------------------------------- 5505: Allocations and Declarations 5506: -------------------------------------------------------------------------- */ 5507: char *texsubexpr(); /* next subexpression from expression */ 5508: int gotsub=0, gotsup=0; /* check that we don't eat, e.g., x_1_2 */ 5509: /* ------------------------------------------------------------------------- 5510: init "scripts" 5511: -------------------------------------------------------------------------- */ 5512: if ( subscript != NULL ) *subscript = '\000'; /*init in case no subscript*/ 5513: if ( superscript!=NULL ) *superscript = '\000'; /*init in case no super*/ 5514: /* ------------------------------------------------------------------------- 5515: get subscript and/or superscript from expression 5516: -------------------------------------------------------------------------- */ 5517: while ( expression != NULL ) { 5518: skipwhite(expression); /* leading whitespace gone */ 5519: if ( *expression == '\000' ) return(expression); /* nothing left to scan */ 5520: if ( isthischar(*expression,SUBSCRIPT) /* found _ */ 5521: && (which==1 || which>2 ) ) /* and caller wants it */ 5522: { if ( gotsub /* found 2nd subscript */ 5523: || subscript == NULL ) break; /* or no subscript buffer */ 5524: gotsub = 1; /* set subscript flag */ 5525: expression = texsubexpr(expression+1,subscript,0,"{","}",0,0); } 5526: else /* no _, check for ^ */ 5527: if ( isthischar(*expression,SUPERSCRIPT) /* found ^ */ 5528: && which>=2 ) /* and caller wants it */ 5529: { if ( gotsup /* found 2nd superscript */ 5530: || superscript == NULL ) break; /* or no superscript buffer*/ 5531: gotsup = 1; /* set superscript flag */ 5532: expression = texsubexpr(expression+1,superscript,0,"{","}",0,0); } 5533: else /* neither _ nor ^ */ 5534: return ( expression ); /*return ptr past "scripts"*/ 5535: } /* --- end-of-while(expression!=NULL) --- */ 5536: return ( expression ); 5537: } /* --- end-of-function texscripts() --- */ 5538: 5539: 5540: /* ========================================================================== 5541: * Function: isbrace ( expression, braces, isescape ) 5542: * Purpose: checks leading char(s) of expression for a brace, 5543: * either escaped or unescaped depending on isescape, 5544: * except that { and } are always matched, if they're 5545: * in braces, regardless of isescape. 5546: * -------------------------------------------------------------------------- 5547: * Arguments: expression (I) char * to first char of null-terminated 5548: * string containing a valid LaTeX expression 5549: * whose leading char(s) are checked for braces 5550: * that begin subexpression, e.g., "{[(<" 5551: * braces (I) char * specifying matching brace delimiters 5552: * to be checked for, e.g., "{[(<" or "}])>" 5553: * isescape (I) int containing 0 to match only unescaped 5554: * braces, e.g., (...) or {...}, etc, 5555: * or containing 1 to match only escaped 5556: * braces, e.g., $...$ or \[...\], etc, 5557: * or containing 2 to match either. 5558: * But note: if {,} are in braces 5559: * then they're *always* matched whether 5560: * escaped or not, regardless of isescape. 5561: * -------------------------------------------------------------------------- 5562: * Returns: ( int ) 1 if the leading char(s) of expression 5563: * is a brace, or 0 if not. 5564: * -------------------------------------------------------------------------- 5565: * Notes: o 5566: * ======================================================================= */ 5567: /* --- entry point --- */ 5568: int isbrace ( char *expression, char *braces, int isescape ) 5569: { 5570: /* ------------------------------------------------------------------------- 5571: Allocations and Declarations 5572: -------------------------------------------------------------------------- */ 5573: int gotescape = 0, /* true if leading char is an escape */ 5574: gotbrace = 0; /*true if first non-escape char is a brace*/ 5575: /* ------------------------------------------------------------------------- 5576: check for brace 5577: -------------------------------------------------------------------------- */ 5578: /* --- first check for end-of-string or \= ligature --- */ 5579: if ( *expression == '\000' /* nothing to check */ 5580: || isligature ) goto end_of_job; /* have a \= ligature */ 5581: /* --- check leading char for escape --- */ 5582: if ( isthischar(*expression,ESCAPE) ) /* expression is escaped */ 5583: { gotescape = 1; /* so set flag accordingly */ 5584: expression++; } /* and bump past escape */ 5585: /* --- check (maybe next char) for brace --- */ 5586: if ( isthischar(*expression,braces) ) /* expression is braced */ 5587: gotbrace = 1; /* so set flag accordingly */ 5588: if ( gotescape && *expression == '.' ) /* \. matches any brace */ 5589: gotbrace = 1; /* set flag */ 5590: /* --- check for TeX brace { or } --- */ 5591: if ( gotbrace && isthischar(*expression,"{}") ) /*expression has TeX brace*/ 5592: if ( isescape ) isescape = 2; /* reset escape flag */ 5593: /* ------------------------------------------------------------------------- 5594: back to caller 5595: -------------------------------------------------------------------------- */ 5596: end_of_job: 5597: if ( msglevel>=999 && msgfp!=NULL ) 5598: { fprintf(msgfp,"isbrace> expression=%.8s, gotbrace=%d (isligature=%d)\n", 5599: expression,gotbrace,isligature); fflush(msgfp); } 5600: if ( gotbrace && /* found a brace */ 5601: ( isescape==2 || /* escape irrelevant */ 5602: gotescape==isescape ) /* un/escaped as requested */ 5603: ) return ( 1 ); return ( 0 ); /* return 1,0 accordingly */ 5604: } /* --- end-of-function isbrace() --- */ 5605: 5606: 5607: /* ========================================================================== 5608: * Function: preamble ( expression, size, subexpr ) 5609: * Purpose: parses $-terminated preamble, if present, at beginning 5610: * of expression, re-setting size if necessary, and 5611: * returning any other parameters besides size in subexpr. 5612: * -------------------------------------------------------------------------- 5613: * Arguments: expression (I) char * to first char of null-terminated 5614: * string containing LaTeX expression possibly 5615: * preceded by $-terminated preamble 5616: * size (I/O) int * containing 0-4 default font size, 5617: * and returning size modified by first 5618: * preamble parameter (or unchanged) 5619: * subexpr(O) char * returning any remaining preamble 5620: * parameters past size 5621: * -------------------------------------------------------------------------- 5622: * Returns: ( char * ) ptr to first char past preamble in expression 5623: * or NULL for any parsing error. 5624: * -------------------------------------------------------------------------- 5625: * Notes: o size can be any number >=0. If preceded by + or -, it's 5626: * interpreted as an increment to input size; otherwise 5627: * it's interpreted as the size. 5628: * o if subexpr is passed as NULL ptr, then returned expression 5629: * ptr will have "flushed" and preamble parameters after size 5630: * ======================================================================= */ 5631: /* --- entry point --- */ 5632: char *preamble ( char *expression, int *size, char *subexpr ) 5633: { 5634: /* ------------------------------------------------------------------------- 5635: Allocations and Declarations 5636: -------------------------------------------------------------------------- */ 5637: char pretext[512], *prep=expression, /*pream from expression, ptr into it*/ 5638: *dollar, *comma; /* preamble delimiters */ 5639: int prelen = 0, /* preamble length */ 5640: sizevalue = 0, /* value of size parameter */ 5641: isfontsize = 0, /*true if leading fontsize present*/ 5642: isdelta = 0; /*true to increment passed size arg*/ 5643: /* ------------------------------------------------------------------------- 5644: initialization 5645: -------------------------------------------------------------------------- */ 5646: if ( subexpr != NULL ) /* caller passed us an address */ 5647: *subexpr = '\000'; /* so init assuming no preamble */ 5648: if ( expression == NULL ) goto end_of_job; /* no input */ 5649: if ( *expression == '\000' ) goto end_of_job; /* input is an empty string */ 5650: /* ------------------------------------------------------------------------- 5651: process preamble if present 5652: -------------------------------------------------------------------------- */ 5653: /*process_preamble:*/ 5654: if ( (dollar=strchr(expression,'$')) /* $ signals preceding preamble */ 5655: != NULL ) { /* found embedded $ */ 5656: if ( (prelen = (int)(dollar-expression)) /*#chars in expression preceding $*/ 5657: > 0 ) { /* must have preamble preceding $ */ 5658: if ( prelen < 65 ) { /* too long for a prefix */ 5659: memcpy(pretext,expression,prelen); /* local copy of preamble */ 5660: pretext[prelen] = '\000'; /* null-terminated */ 5661: if ( strchr(pretext,*(ESCAPE))==NULL /*shouldn't be an escape in preamble*/ 5662: && strchr(pretext,'{') == NULL ) { /*shouldn't be a left{ in preamble*/ 5663: /* --- skip any leading whitespace --- */ 5664: prep = pretext; /* start at beginning of preamble */ 5665: skipwhite(prep); /* skip any leading white space */ 5666: /* --- check for embedded , or leading +/- (either signalling size) --- */ 5667: if ( isthischar(*prep,"+-") ) /* have leading + or - */ 5668: isdelta = 1; /* so use size value as increment */ 5669: comma = strchr(pretext,','); /* , signals leading size param */ 5670: /* --- process leading size parameter if present --- */ 5671: if ( comma != NULL /* size param explicitly signalled */ 5672: || isdelta || isdigit(*prep) ) { /* or inferred implicitly */ 5673: /* --- parse size parameter and reset size accordingly --- */ 5674: if( comma != NULL ) *comma = '\000';/*, becomes null, terminating size*/ 5675: sizevalue = atoi(prep); /* convert size string to integer */ 5676: if ( size != NULL ) /* caller passed address for size */ 5677: *size = (isdelta? *size+sizevalue : sizevalue); /* so reset size */ 5678: /* --- finally, set flag and shift size parameter out of preamble --- */ 5679: isfontsize = 1; /*set flag showing font size present*/ 5680: if ( comma != NULL ) /*2/15/12-isn't this superfluous???*/ 5681: {strsqueezep(pretext,comma+1);} /* squeeze out leading size param */ 5682: } /* --- end-of-if(comma!=NULL||etc) --- */ 5683: /* --- copy any preamble params following size to caller's subexpr --- */ 5684: if ( comma != NULL || !isfontsize ) /*preamb contains params past size*/ 5685: if ( subexpr != NULL ) /* caller passed us an address */ 5686: strcpy(subexpr,pretext); /*so return extra params to caller*/ 5687: /* --- finally, set prep to shift preamble out of expression --- */ 5688: prep = expression + prelen+1; /* set prep past $ in expression */ 5689: } /* --- end-of-if(strchr(pretext,*ESCAPE)==NULL) --- */ 5690: } /* --- end-of-if(prelen<65) --- */ 5691: } /* --- end-of-if(prelen>0) --- */ 5692: else { /* $ is first char of expression */ 5693: int ndollars = 0; /* number of $...$ pairs removed */ 5694: prep = expression; /* start at beginning of expression*/ 5695: while ( *prep == '$' ) { /* remove all matching $...$'s */ 5696: int explen = strlen(prep)-1; /* index of last char in expression*/ 5697: if ( explen < 2 ) break; /* no $...$'s left to remove */ 5698: if ( prep[explen] != '$' ) break; /* unmatched $ */ 5699: prep[explen] = '\000'; /* remove trailing $ */ 5700: prep++; /* and remove matching leading $ */ 5701: ndollars++; /* count another pair removed */ 5702: } /* --- end-of-while(*prep=='$') --- */ 5703: ispreambledollars = ndollars; /* set flag to fix \displaystyle */ 5704: if ( ndollars == 1 ) /* user submitted $...$ expression */ 5705: isdisplaystyle = 0; /* so set \textstyle */ 5706: if ( ndollars > 1 ) /* user submitted $$...$$ */ 5707: isdisplaystyle = 2; /* so set \displaystyle */ 5708: /*goto process_preamble;*/ /*check for preamble after leading $*/ 5709: } /* --- end-of-if/else(prelen>0) --- */ 5710: } /* --- end-of-if(dollar!=NULL) --- */ 5711: /* ------------------------------------------------------------------------- 5712: back to caller 5713: -------------------------------------------------------------------------- */ 5714: end_of_job: 5715: return ( prep ); /*expression, or ptr past preamble*/ 5716: } /* --- end-of-function preamble() --- */ 5717: 5718: 5719: /* ========================================================================== 5720: * Function: mimeprep ( expression ) 5721: * Purpose: preprocessor for mimeTeX input, e.g., 5722: * (a) removes comments, 5723: * (b) converts \left( to $ and \right) to $, 5724: * (c) xlates &html; special chars to equivalent latex 5725: * Should only be called once (after unescape_url()) 5726: * -------------------------------------------------------------------------- 5727: * Arguments: expression (I/O) char * to first char of null-terminated 5728: * string containing mimeTeX/LaTeX expression, 5729: * and returning preprocessed string 5730: * -------------------------------------------------------------------------- 5731: * Returns: ( char * ) ptr to input expression, 5732: * or NULL for any parsing error. 5733: * -------------------------------------------------------------------------- 5734: * Notes: o 5735: * ======================================================================= */ 5736: /* --- entry point --- */ 5737: char *mimeprep ( char *expression ) 5738: { 5739: /* ------------------------------------------------------------------------- 5740: Allocations and Declarations 5741: -------------------------------------------------------------------------- */ 5742: char *expptr=expression, /* ptr within expression */ 5743: *tokptr=NULL, /*ptr to token found in expression*/ 5744: *texsubexpr(), argval[8192]; /*parse for macro args after token*/ 5745: char *strchange(); /* change leading chars of string */ 5746: int strreplace(); /* replace nnn with actual num, etc*/ 5747: char *strwstr(); /*use strwstr() instead of strstr()*/ 5748: char *findbraces(); /*find left { and right } for \atop*/ 5749: int idelim=0, /* left- or right-index */ 5750: isymbol=0; /*symbols[],rightcomment[],etc index*/ 5751: int xlateleft = 0; /* true to xlate \left and \right */ 5752: /* --- 5753: * comments 5754: * -------- */ 5755: char *leftptr=NULL; /* find leftcomment in expression */ 5756: static char *leftcomment = "%%", /* open comment */ 5757: *rightcomment[] = {"\n", "%%", NULL}; /* close comments */ 5758: /* --- 5759: * special long (more than 1-char) \left and \right delimiters 5760: * ----------------------------------------------------------- */ 5761: static char *leftfrom[] = /* xlate any \left suffix... */ 5762: { "\\|", /* \left\| */ 5763: "\\{", /* \left\{ */ 5764: "\\langle", /* \left\langle */ 5765: NULL } ; /* --- end-of-leftfrom[] --- */ 5766: static char *leftto[] = /* ...to this instead */ 5767: { "=", /* = */ 5768: "{", /* { */ 5769: "<", /* < */ 5770: NULL } ; /* --- end-of-leftto[] --- */ 5771: static char *rightfrom[] = /* xlate any \right suffix... */ 5772: { "\\|", /* \right\| */ 5773: "\\}", /* \right\} */ 5774: "\\rangle", /* \right\rangle */ 5775: NULL } ; /* --- end-of-rightfrom[] --- */ 5776: static char *rightto[] = /* ...to this instead */ 5777: { "=", /* = */ 5778: "}", /* } */ 5779: ">", /* > */ 5780: NULL } ; /* --- end-of-rightto[] --- */ 5781: /* --- 5782: * { \atop }-like commands 5783: * ----------------------- */ 5784: char *atopsym=NULL; /* atopcommands[isymbol] */ 5785: static char *atopcommands[] = /* list of {a+b\command c+d}'s */ 5786: { "\\over", /* plain tex for \frac */ 5787: "\\choose", /* binomial coefficient */ 5788: #ifndef NOATOP /*noatop preserves old mimeTeX rule*/ 5789: "\\atop", 5790: #endif 5791: NULL } ; /* --- end-of-atopcommands[] --- */ 5792: static char *atopdelims[] = /* delims for atopcommands[] */ 5793: { NULL, NULL, /* \\over has no delims */ 5794: "\\left(", "\\right)", /* \\choose has ( ) delims*/ 5795: #ifndef NOATOP /*noatop preserves old mimeTeX rule*/ 5796: NULL, NULL, /* \\atop has no delims */ 5797: #endif 5798: NULL, NULL } ; /* --- end-of-atopdelims[] --- */ 5799: /* --- 5800: * html special/escape chars converted to latex equivalents 5801: * -------------------------------------------------------- */ 5802: char *htmlsym=NULL; /* symbols[isymbol].html */ 5803: static struct { char *html; char *args; char *latex; } symbols[] = 5804: { /* -------------------------------------------- 5805: user-supplied newcommands 5806: -------------------------------------------- */ 5807: #ifdef NEWCOMMANDS /* -DNEWCOMMANDS=\"filename.h\" */ 5808: #include NEWCOMMANDS 5809: #endif 5810: /* -------------------------------------------- 5811: Specials termchar value... 5812: -------------------------------------------- */ 5813: { "\\version", NULL, "{\\small\\red\\text \\fbox{\\begin{gather}" 5814: "mime\\TeX version \\versionnumber \\\\" 5815: "last revised \\revisiondate \\\\ \\copyrighttext \\\\" 5816: "see \\homepagetext for details \\end{gather}}}" }, 5817: { "\\copyright", NULL, 5818: "{\\small\\red\\text \\fbox{\\begin{gather}" 5819: "mimeTeX \\copyrighttext \\\\" 5820: "see \\homepagetext for details \\end{gather}}}" }, 5821: { "\\versionnumber", NULL, "{\\text " VERSION "}" }, 5822: { "\\revisiondate", NULL, "{\\text " REVISIONDATE "}" }, 5823: { "\\copyrighttext", NULL, "{\\text " COPYRIGHTTEXT ".}" }, 5824: { "\\homepagetext", NULL, 5825: "{\\text http://www.forkosh.com/mimetex.html}" }, 5826: /* -------------------------------------------- 5827: Cyrillic termchar mimeTeX equivalent... 5828: -------------------------------------------- */ 5829: { "\\\'G", "embed\\","{\\acute{G}}" }, 5830: { "\\\'g", "embed\\","{\\acute{g}}" }, 5831: { "\\\'K", "embed\\","{\\acute{K}}" }, 5832: { "\\\'k", "embed\\","{\\acute{k}}" }, 5833: { "\\u U", "embed\\","{\\breve{U}}" }, 5834: { "\\u u", "embed\\","{\\breve{u}}" }, 5835: /*{ "\\\"E", "embed\\","{\\ddot{E}}" },*/ 5836: /*{ "\\\"e", "embed\\","{\\ddot{e}}" },*/ 5837: { "\\\"I", "embed\\","{\\ddot{\\=I}}" }, 5838: { "\\\"\\i", "embed\\","{\\ddot{\\=\\i}}" }, 5839: /* -------------------------------------------- 5840: LaTeX Macro #args,default template... 5841: -------------------------------------------- */ 5842: { "\\lvec", "2n", "{#2_1,\\cdots,#2_{#1}}" }, 5843: { "\\grave", "1", "{\\stackrel{\\Huge\\gravesym}{#1}}" }, /* \grave */ 5844: { "\\acute", "1", "{\\stackrel{\\Huge\\acutesym}{#1}}" }, /* \acute */ 5845: { "\\check", "1", "{\\stackrel{\\Huge\\checksym}{#1}}" }, /* \check */ 5846: { "\\breve", "1", "{\\stackrel{\\Huge\\brevesym}{#1}}" }, /* \breve */ 5847: { "\\buildrel","3", "{\\stackrel{#1}{#3}}" }, /* ignore #2 = \over */ 5848: { "\\overset", NULL, "\\stackrel" }, /* just an alias */ 5849: { "\\underset", "2", "\\relstack{#2}{#1}" }, /* reverse args */ 5850: { "\\dfrac", "2", "{\\frac{#1}{#2}}" }, 5851: { "\\binom", "2", "{\\begin{pmatrix}{#1}\\\\{#2}\\end{pmatrix}}" }, 5852: { "\\aangle","26", "{\\boxaccent{#1}{#2}}" }, 5853: { "\\actuarial","2 ","{#1\\boxaccent{6}{#2}}" }, /*comprehensive sym list*/ 5854: { "\\boxaccent","2", "{\\fbox[,#1]{#2}}" }, 5855: /* -------------------------------------------- 5856: html char termchar LaTeX equivalent... 5857: -------------------------------------------- */ 5858: { "&quot", ";", "\"" }, /* " is first, " */ 5859: { "&amp", ";", "&" }, 5860: { "&lt", ";", "<" }, 5861: { "&gt", ";", ">" }, 5862: /*{ "&#092", ";", "\\" },*/ /* backslash */ 5863: { "&backslash",";", "\\" }, 5864: { "&nbsp", ";", "~" }, 5865: { "&iexcl", ";", "{\\raisebox{-2}{\\rotatebox{180}{!}}}" }, 5866: { "&brvbar", ";", "|" }, 5867: { "&plusmn", ";", "\\pm" }, 5868: { "&sup2", ";", "{{}^2}" }, 5869: { "&sup3", ";", "{{}^3}" }, 5870: { "&micro", ";", "\\mu" }, 5871: { "&sup1", ";", "{{}^1}" }, 5872: { "&frac14", ";", "{\\frac14}" }, 5873: { "&frac12", ";", "{\\frac12}" }, 5874: { "&frac34", ";", "{\\frac34}" }, 5875: { "&iquest", ";", "{\\raisebox{-2}{\\rotatebox{180}{?}}}" }, 5876: { "&Acirc", ";", "{\\rm~\\hat~A}" }, 5877: { "&Atilde", ";", "{\\rm~\\tilde~A}" }, 5878: { "&Auml", ";", "{\\rm~\\ddot~A}" }, 5879: { "&Aring", ";", "{\\rm~A\\limits^{-1$o}}" }, 5880: { "&atilde", ";", "{\\rm~\\tilde~a}" }, 5881: { "&yuml", ";", "{\\rm~\\ddot~y}" }, /* ÿ is last, ÿ */ 5882: { "&#", ";", "{[\\&\\#nnn?]}" }, /* all other explicit &#nnn's */ 5883: /* -------------------------------------------- 5884: html tag termchar LaTeX equivalent... 5885: -------------------------------------------- */ 5886: { "< br >", "embed\\i", "\\\\" }, 5887: { "< br / >", "embed\\i", "\\\\" }, 5888: { "< dd >", "embed\\i", " \000" }, 5889: { "< / dd >", "embed\\i", " \000" }, 5890: { "< dl >", "embed\\i", " \000" }, 5891: { "< / dl >", "embed\\i", " \000" }, 5892: { "< p >", "embed\\i", " \000" }, 5893: { "< / p >", "embed\\i", " \000" }, 5894: /* -------------------------------------------- 5895: garbage termchar LaTeX equivalent... 5896: -------------------------------------------- */ 5897: { "< tex >", "embed\\i", " \000" }, 5898: { "< / tex >", "embed\\i", " \000" }, 5899: /* -------------------------------------------- 5900: LaTeX termchar mimeTeX equivalent... 5901: -------------------------------------------- */ 5902: { "\\AA", NULL, "{\\rm~A\\limits^{-1$o}}" }, 5903: { "\\aa", NULL, "{\\rm~a\\limits^{-1$o}}" }, 5904: { "\\bmod", NULL, "{\\hspace2{\\rm~mod}\\hspace2}" }, 5905: { "\\vdots", NULL, "{\\raisebox3{\\rotatebox{90}{\\ldots}}}" }, 5906: { "\\dots", NULL, "{\\cdots}" }, 5907: { "\\cdots", NULL, "{\\raisebox3{\\ldots}}" }, 5908: { "\\ldots", NULL, "{\\fs4.\\hspace1.\\hspace1.}" }, 5909: { "\\ddots", NULL, "{\\fs4\\raisebox8.\\hspace1\\raisebox4." 5910: "\\hspace1\\raisebox0.}"}, 5911: { "\\notin", NULL, "{\\not\\in}" }, 5912: { "\\neq", NULL, "{\\not=}" }, 5913: { "\\ne", NULL, "{\\not=}" }, 5914: { "\\mapsto", NULL, "{\\rule[fs/2]{1}{5+fs}\\hspace{-99}\\to}" }, 5915: { "\\hbar", NULL, "{\\compose~h{{\\fs{-1}-\\atop\\vspace3}}}" }, 5916: { "\\angle", NULL, "{\\compose{\\hspace{3}\\lt}{\\circle(10,15;-80,80)}}"}, 5917: { "\\textcelsius", NULL, "{\\textdegree C}"}, 5918: { "\\textdegree", NULL, "{\\Large^{^{\\tiny\\mathbf o}}}"}, 5919: { "\\cr", NULL, "\\\\" }, 5920: /*{ "\\colon", NULL, "{:}" },*/ 5921: { "\\iiint", NULL, "{\\int\\int\\int}\\limits" }, 5922: { "\\iint", NULL, "{\\int\\int}\\limits" }, 5923: { "\\Bigiint", NULL, "{\\Bigint\\Bigint}\\limits" }, 5924: { "\\bigsqcap",NULL, "{\\fs{+4}\\sqcap}" }, 5925: { "\\_", "embed","{\\underline{\\ }}" }, /* displayed underscore */ 5926: { "!`", NULL, "{\\raisebox{-2}{\\rotatebox{180}{!}}}" }, 5927: { "?`", NULL, "{\\raisebox{-2}{\\rotatebox{180}{?}}}" }, 5928: { "^\'", "embed","\'" }, /* avoid ^^ when re-xlating \' below */ 5929: { "\'\'\'\'","embed","^{\\fs{-1}\\prime\\prime\\prime\\prime}" }, 5930: { "\'\'\'", "embed","^{\\fs{-1}\\prime\\prime\\prime}" }, 5931: { "\'\'", "embed","^{\\fs{-1}\\prime\\prime}" }, 5932: { "\'", "embed","^{\\fs{-1}\\prime}" }, 5933: { "\\rightleftharpoons",NULL,"{\\rightharpoonup\\atop\\leftharpoondown}" }, 5934: { "\\therefore",NULL,"{\\Huge\\raisebox{-4}{.\\atop.\\,.}}" }, 5935: { "\\LaTeX", NULL, "{\\rm~L\\raisebox{3}{\\fs{-1}A}\\TeX}" }, 5936: { "\\TeX", NULL, "{\\rm~T\\raisebox{-3}{E}X}" }, 5937: { "\\cyan", NULL, "{\\reverse\\red\\reversebg}" }, 5938: { "\\magenta",NULL, "{\\reverse\\green\\reversebg}" }, 5939: { "\\yellow",NULL, "{\\reverse\\blue\\reversebg}" }, 5940: { "\\cancel",NULL, "\\Not" }, 5941: { "\\hhline",NULL, "\\Hline" }, 5942: { "\\Hline", NULL, "\\hline\\,\\\\\\hline" }, 5943: /* ----------------------------------------------------------------------- 5944: As per emails with Zbigniew Fiedorowicz <fiedorow@math.ohio-state.edu> 5945: "Algebra Syntax" termchar mimeTeX/LaTeX equivalent... 5946: ----------------------------------------------------------------------- */ 5947: { "sqrt", "1", "{\\sqrt{#1}}" }, 5948: { "sin", "1", "{\\sin{#1}}" }, 5949: { "cos", "1", "{\\cos{#1}}" }, 5950: { "asin", "1", "{\\sin^{-1}{#1}}" }, 5951: { "acos", "1", "{\\cos^{-1}{#1}}" }, 5952: { "exp", "1", "{{\\rm~e}^{#1}}" }, 5953: { "det", "1", "{\\left|{#1}\\right|}" }, 5954: /* -------------------------------------------- 5955: LaTeX Constant termchar value... 5956: -------------------------------------------- */ 5957: { "\\thinspace", NULL, "\\," }, 5958: { "\\thinmathspace", NULL, "\\," }, 5959: { "\\textwidth", NULL, "400" }, 5960: /* --- end-of-table indicator --- */ 5961: { NULL, NULL, NULL } 5962: } ; /* --- end-of-symbols[] --- */ 5963: /* --- 5964: * html &#nn chars converted to latex equivalents 5965: * ---------------------------------------------- */ 5966: int htmlnum=0; /* numbers[inum].html */ 5967: static struct { int html; char *latex; } numbers[] = 5968: { /* --------------------------------------- 5969: html num LaTeX equivalent... 5970: --------------------------------------- */ 5971: { 9, " " }, /* horizontal tab */ 5972: { 10, " " }, /* line feed */ 5973: { 13, " " }, /* carriage return */ 5974: { 32, " " }, /* space */ 5975: { 33, "!" }, /* exclamation point */ 5976: { 34, "\"" }, /* " */ 5977: { 35, "#" }, /* hash mark */ 5978: { 36, "$" }, /* dollar */ 5979: { 37, "%" }, /* percent */ 5980: { 38, "&" }, /* & */ 5981: { 39, "\'" }, /* apostrophe (single quote) */ 5982: { 40, ")" }, /* left parenthesis */ 5983: { 41, ")" }, /* right parenthesis */ 5984: { 42, "*" }, /* asterisk */ 5985: { 43, "+" }, /* plus */ 5986: { 44, "," }, /* comma */ 5987: { 45, "-" }, /* hyphen (minus) */ 5988: { 46, "." }, /* period */ 5989: { 47, "/" }, /* slash */ 5990: { 58, ":" }, /* colon */ 5991: { 59, ";" }, /* semicolon */ 5992: { 60, "<" }, /* < */ 5993: { 61, "=" }, /* = */ 5994: { 62, ">" }, /* > */ 5995: { 63, "\?" }, /* question mark */ 5996: { 64, "@" }, /* commercial at sign */ 5997: { 91, "[" }, /* left square bracket */ 5998: { 92, "\\" }, /* backslash */ 5999: { 93, "]" }, /* right square bracket */ 6000: { 94, "^" }, /* caret */ 6001: { 95, "_" }, /* underscore */ 6002: { 96, "`" }, /* grave accent */ 6003: { 123, "{" }, /* left curly brace */ 6004: { 124, "|" }, /* vertical bar */ 6005: { 125, "}" }, /* right curly brace */ 6006: { 126, "~" }, /* tilde */ 6007: { 160, "~" }, /*   (use tilde for latex) */ 6008: { 166, "|" }, /* ¦ (broken vertical bar) */ 6009: { 173, "-" }, /*  (soft hyphen) */ 6010: { 177, "{\\pm}" }, /* ± (plus or minus) */ 6011: { 215, "{\\times}" }, /* × (plus or minus) */ 6012: { -999, NULL } 6013: } ; /* --- end-of-numbers[] --- */ 6014: /* ------------------------------------------------------------------------- 6015: first remove comments 6016: -------------------------------------------------------------------------- */ 6017: expptr = expression; /* start search at beginning */ 6018: while ( (leftptr=strstr(expptr,leftcomment)) != NULL ) /*found leftcomment*/ 6019: { 6020: char *rightsym=NULL; /* rightcomment[isymbol] */ 6021: expptr = leftptr+strlen(leftcomment); /* start rightcomment search here */ 6022: /* --- check for any closing rightcomment, in given precedent order --- */ 6023: if ( *expptr != '\000' ) /*have chars after this leftcomment*/ 6024: for(isymbol=0; (rightsym=rightcomment[isymbol]) != NULL; isymbol++) 6025: if ( (tokptr=strstr(expptr,rightsym)) != NULL ) /*found rightcomment*/ 6026: { tokptr += strlen(rightsym); /* first char after rightcomment */ 6027: if ( *tokptr == '\000' ) /*nothing after this rightcomment*/ 6028: { *leftptr = '\000'; /*so terminate expr at leftcomment*/ 6029: break; } /* and stop looking for comments */ 6030: *leftptr = '~'; /* replace entire comment by ~ */ 6031: strsqueezep(leftptr+1,tokptr); /* squeeze out comment */ 6032: goto next_comment; } /* stop looking for rightcomment */ 6033: /* --- no rightcomment after opening leftcomment --- */ 6034: *leftptr = '\000'; /* so terminate expression */ 6035: /* --- resume search past squeezed-out comment --- */ 6036: next_comment: 6037: if ( *leftptr == '\000' ) break; /* reached end of expression */ 6038: expptr = leftptr+1; /*resume search after this comment*/ 6039: } /* --- end-of-while(leftptr!=NULL) --- */ 6040: /* ------------------------------------------------------------------------- 6041: run thru table, converting all occurrences of each macro to its expansion 6042: -------------------------------------------------------------------------- */ 6043: for(isymbol=0; (htmlsym=symbols[isymbol].html) != NULL; isymbol++) 6044: { 6045: int htmllen = strlen(htmlsym); /* length of escape, _without_ ; */ 6046: int isalgebra = isalpha((int)(*htmlsym)); /* leading char alphabetic */ 6047: int isembedded = 0, /* true to xlate even if embedded */ 6048: istag=0, isamp=0, /* true for <tag>, &char; symbols */ 6049: isstrwstr = 0, /* true to use strwstr() */ 6050: wstrlen = 0; /* length of strwstr() match */ 6051: char *aleft="{([<|", *aright="})]>|"; /*left,right delims for alg syntax*/ 6052: char embedkeywd[99] = "embed", /* keyword to signal embedded token*/ 6053: embedterm = '\000'; /* char immediately after embed */ 6054: int embedlen = strlen(embedkeywd); /* #chars in embedkeywd */ 6055: char *args = symbols[isymbol].args, /* number {}-args, optional []-arg */ 6056: *htmlterm = args, /*if *args nonumeric, then html term*/ 6057: *latexsym = symbols[isymbol].latex, /*latex replacement for htmlsym*/ 6058: errorsym[256]; /*or latexsym may point to error msg*/ 6059: char abuff[8192]; int iarg,nargs=0; /* macro expansion params */ 6060: char wstrwhite[99]; /* whitespace chars for strwstr() */ 6061: skipwhite(htmlsym); /*skip any bogus leading whitespace*/ 6062: htmllen = strlen(htmlsym); /* reset length of html token */ 6063: istag = (isthischar(*htmlsym,"<")?1:0); /* html <tag> starts with < */ 6064: isamp = (isthischar(*htmlsym,"&")?1:0); /* html &char; starts with & */ 6065: if ( args != NULL ) /*we have args (or htmlterm) param*/ 6066: if ( *args != '\000' ) { /* and it's not an empty string */ 6067: if ( strchr("0123456789",*args) != NULL ) /* is 1st char #args=0-9 ? */ 6068: { htmlterm = NULL; /* if so, then we have no htmlterm */ 6069: *abuff = *args; abuff[1] = '\000'; /* #args char in ascii buffer */ 6070: nargs = atoi(abuff); } /* interpret #args to numeric */ 6071: else if ( strncmp(args,embedkeywd,embedlen) == 0 )/*xlate embedded token*/ 6072: { int arglen = strlen(args); /* length of "embed..." string */ 6073: htmlterm = NULL; /* if so, then we have no htmlterm */ 6074: isembedded = 1 ; /* turn on embedded flag */ 6075: if ( arglen > embedlen ) /* have embed "allow escape" flag */ 6076: embedterm = args[embedlen]; /* char immediately after "embed" */ 6077: if (arglen > embedlen+1) { /* have embed,flag,white for strwstr*/ 6078: isstrwstr = 1; /* turn on strwtsr flag */ 6079: strcpy(wstrwhite,args+embedlen+1); } } /*and set its whitespace arg*/ 6080: } /* --- end-of-if(*args!='\000') --- */ 6081: expptr = expression; /* re-start search at beginning */ 6082: while ( ( tokptr=(!isstrwstr?strstr(expptr,htmlsym): /* just use strtsr */ 6083: strwstr(expptr,htmlsym,wstrwhite,&wstrlen)) ) /* or use our strwstr */ 6084: != NULL ) { /* found another sym */ 6085: int toklen = (!isstrwstr?htmllen:wstrlen); /* length of matched sym */ 6086: char termchar = *(tokptr+toklen), /* char terminating html sequence */ 6087: prevchar = (tokptr==expptr?' ':*(tokptr-1));/*char preceding html*/ 6088: int isescaped = (isthischar(prevchar,ESCAPE)?1:0); /* token escaped?*/ 6089: int escapelen = toklen; /* total length of escape sequence */ 6090: int isflush = 0; /* true to flush (don't xlate) */ 6091: /* --- check odd/even backslashes preceding tokens --- */ 6092: if ( isescaped ) { /* have one preceding backslash */ 6093: char *p = tokptr-1; /* ptr to that preceding backslash */ 6094: while ( p != expptr ) { /* and we may have more preceding */ 6095: p--; if(!isthischar(*p,ESCAPE))break; /* but we don't, so quit */ 6096: isescaped = 1-isescaped; } } /* or flip isescaped flag if we do */ 6097: /* --- init with "trivial" abuff,escapelen from symbols[] table --- */ 6098: *abuff = '\000'; /* default to empty string */ 6099: if ( latexsym != NULL ) /* table has .latex xlation */ 6100: if ( *latexsym != '\000' ) /* and it's not an empty string */ 6101: strcpy(abuff,latexsym); /* so get local copy */ 6102: if ( !isembedded ) /*embedded sequences not terminated*/ 6103: if ( htmlterm != NULL ) /* sequence may have terminator */ 6104: escapelen += (isthischar(termchar,htmlterm)?1:0); /*add terminator*/ 6105: /* --- don't xlate if we just found prefix of longer symbol, etc --- */ 6106: if ( !isembedded ) { /* not embedded */ 6107: if ( isescaped ) /* escaped */ 6108: isflush = 1; /* set flag to flush escaped token */ 6109: if ( !istag && isalpha((int)termchar) ) /* followed by alpha */ 6110: isflush = 1; /* so just a prefix of longer symbol*/ 6111: if ( isalpha((int)(*htmlsym)) ) /* symbol starts with alpha */ 6112: if ( (!isspace(prevchar)&&isalpha(prevchar)) ) /* just a suffix*/ 6113: isflush = 1; } /* set flag to flush token */ 6114: if ( isembedded ) /* for embedded token */ 6115: if ( isescaped ) /* and embedded \token escaped */ 6116: if ( !isthischar(embedterm,ESCAPE) ) /* don't xlate escaped \token */ 6117: isflush = 1; /* set flag to flush token */ 6118: if ( isflush ) /* don't xlate this token */ 6119: { expptr = tokptr+1;/*toklen;*/ /* just resume search after token */ 6120: continue; } /* but don't replace it */ 6121: /* --- check for &# prefix signalling &#nnn; --- */ 6122: if ( strcmp(htmlsym,"&#") == 0 ) { /* replacing special &#nnn; chars */ 6123: /* --- accumulate chars comprising number following &# --- */ 6124: char anum[32]; /* chars comprising number after &# */ 6125: int inum = 0; /* no chars accumulated yet */ 6126: while ( termchar != '\000' ) { /* don't go past end-of-string */ 6127: if ( !isdigit((int)termchar) ) break; /* and don't go past digits */ 6128: if ( inum > 10 ) break; /* some syntax error in expression */ 6129: anum[inum] = termchar; /* accumulate this digit */ 6130: inum++; toklen++; /* bump field length, token length */ 6131: termchar = *(tokptr+toklen); } /* char terminating html sequence */ 6132: anum[inum] = '\000'; /* null-terminate anum */ 6133: escapelen = toklen; /* length of &#nnn; sequence */ 6134: if ( htmlterm != NULL ) /* sequence may have terminator */ 6135: escapelen += (isthischar(termchar,htmlterm)?1:0); /*add terminator*/ 6136: /* --- look up &#nnn in number[] table --- */ 6137: htmlnum = atoi(anum); /* convert anum[] to an integer */ 6138: strninit(errorsym,latexsym,128); /* init error message */ 6139: latexsym = errorsym; /* init latexsym as error message */ 6140: strreplace(latexsym,"nnn",anum,1); /*place actual &#num in message*/ 6141: for ( inum=0; numbers[inum].html>=0; inum++ ) /* run thru numbers[] */ 6142: if ( htmlnum == numbers[inum].html ) { /* till we find a match */ 6143: latexsym = numbers[inum].latex; /* latex replacement */ 6144: break; } /* no need to look any further */ 6145: if ( latexsym != NULL ) /* table has .latex xlation */ 6146: if ( *latexsym != '\000' ) /* and it's not an empty string */ 6147: strcpy(abuff,latexsym); /* so get local copy */ 6148: } /* --- end-of-if(strcmp(htmlsym,"&#")==0) --- */ 6149: /* --- substitute macro arguments --- */ 6150: if ( nargs > 0 ) /*substitute #1,#2,... in latexsym*/ 6151: { 6152: char *arg1ptr = tokptr+escapelen;/* nargs begin after macro literal */ 6153: char *optarg = args+1; /* ptr 1 char past #args digit 0-9 */ 6154: expptr = arg1ptr; /* ptr to beginning of next arg */ 6155: for ( iarg=1; iarg<=nargs; iarg++ ) /* one #`iarg` arg at a time */ 6156: { 6157: char argsignal[32] = "#1", /* #1...#9 signals arg replacement */ 6158: *argsigptr = NULL; /* ptr to argsignal in abuff[] */ 6159: /* --- get argument value --- */ 6160: *argval = '\000'; /* init arg as empty string */ 6161: skipwhite(expptr); /* and skip leading white space */ 6162: if ( iarg==1 && *optarg!='\000' /* check for optional [arg] */ 6163: && !isalgebra ) /* but not in "algebra syntax" */ 6164: { strcpy(argval,optarg); /* init with default value */ 6165: if ( *expptr == '[' ) /* but user gave us [argval] */ 6166: expptr = texsubexpr(expptr,argval,0,"[","]",0,0); } /*so get it*/ 6167: else /* not optional, so get {argval} */ 6168: if ( *expptr != '\000' ) { /* check that some argval provided */ 6169: if ( !isalgebra ) /* only { } delims for latex macro */ 6170: expptr = texsubexpr(expptr,argval,0,"{","}",0,0);/*get {argval}*/ 6171: else { /*any delim for algebra syntax macro*/ 6172: expptr = texsubexpr(expptr,argval,0,aleft,aright,0,1); 6173: if ( isthischar(*argval,aleft) ) /* have delim-enclosed arg */ 6174: if ( *argval != '{' ) { /* and it's not { }-enclosed */ 6175: strchange(0,argval,"\\left"); /* insert opening \left, */ 6176: strchange(0,argval+strlen(argval)-1,"\\right"); } }/*\right*/ 6177: } /* --- end-of-if(*expptr!='\000') --- */ 6178: /* --- (recursively) call mimeprep() to prep the argument --- */ 6179: if ( !isempty(argval) ) /* have an argument */ 6180: mimeprep(argval); /* so (recursively) prep it */ 6181: /* --- replace #`iarg` in macro with argval --- */ 6182: sprintf(argsignal,"#%d",iarg); /* #1...#9 signals argument */ 6183: while ( (argsigptr=strstr(argval,argsignal)) != NULL ) /* #1...#9 */ 6184: {strsqueeze(argsigptr,strlen(argsignal));} /* can't be in argval */ 6185: while ( (argsigptr=strstr(abuff,argsignal)) != NULL ) /* #1...#9 */ 6186: strchange(strlen(argsignal),argsigptr,argval); /*replaced by argval*/ 6187: } /* --- end-of-for(iarg) --- */ 6188: escapelen += ((int)(expptr-arg1ptr)); /* add in length of all args */ 6189: } /* --- end-of-if(nargs>0) --- */ 6190: strchange(escapelen,tokptr,abuff); /*replace macro or html symbol*/ 6191: expptr = tokptr + strlen(abuff); /*resume search after macro / html*/ 6192: } /* --- end-of-while(tokptr!=NULL) --- */ 6193: } /* --- end-of-for(isymbol) --- */ 6194: /* ------------------------------------------------------------------------- 6195: convert \left( to $ and \right) to $, etc. 6196: -------------------------------------------------------------------------- */ 6197: if ( xlateleft ) /* \left...\right xlation wanted */ 6198: for ( idelim=0; idelim<2; idelim++ ) /* 0 for \left and 1 for \right */ 6199: { 6200: char *lrstr = (idelim==0?"\\left":"\\right"); /* \left on 1st pass */ 6201: int lrlen = (idelim==0?5:6); /* strlen() of \left or \right */ 6202: char *braces = (idelim==0?LEFTBRACES ".":RIGHTBRACES "."), /*([{<or)]}>*/ 6203: **lrfrom= (idelim==0?leftfrom:rightfrom), /* long braces like \| */ 6204: **lrto = (idelim==0?leftto:rightto), /* xlated to 1-char like = */ 6205: *lrsym = NULL; /* lrfrom[isymbol] */ 6206: expptr = expression; /* start search at beginning */ 6207: while ( (tokptr=strstr(expptr,lrstr)) != NULL ) /* found \left or \right */ 6208: { 6209: if ( isthischar(*(tokptr+lrlen),braces) ) /* followed by a 1-char brace*/ 6210: { strsqueeze((tokptr+1),(lrlen-1));/*so squeeze out "left" or "right"*/ 6211: expptr = tokptr+2; } /* and resume search past brace */ 6212: else /* may be a "long" brace like \| */ 6213: { 6214: expptr = tokptr+lrlen; /*init to resume search past\left\rt*/ 6215: for(isymbol=0; (lrsym=lrfrom[isymbol]) != NULL; isymbol++) 6216: { int symlen = strlen(lrsym); /* #chars in delim, e.g., 2 for \| */ 6217: if ( memcmp(tokptr+lrlen,lrsym,symlen) == 0 ) /* found long delim*/ 6218: { strsqueeze((tokptr+1),(lrlen+symlen-2)); /*squeeze out delim*/ 6219: *(tokptr+1) = *(lrto[isymbol]); /* last char now 1-char delim*/ 6220: expptr = tokptr+2 - lrlen; /* resume search past 1-char delim*/ 6221: break; } /* no need to check more lrsym's */ 6222: } /* --- end-of-for(isymbol) --- */ 6223: } /* --- end-of-if/else(isthischar()) --- */ 6224: } /* --- end-of-while(tokptr!=NULL) --- */ 6225: } /* --- end-of-for(idelim) --- */ 6226: /* ------------------------------------------------------------------------- 6227: run thru table, converting all {a+b\atop c+d} to \atop{a+b}{c+d} 6228: -------------------------------------------------------------------------- */ 6229: for(isymbol=0; (atopsym=atopcommands[isymbol]) != NULL; isymbol++) 6230: { 6231: int atoplen = strlen(atopsym); /* #chars in \atop */ 6232: expptr = expression; /* re-start search at beginning */ 6233: while ( (tokptr=strstr(expptr,atopsym)) != NULL ) /* found another atop */ 6234: { char *leftbrace=NULL, *rightbrace=NULL; /*ptr to opening {, closing }*/ 6235: char termchar = *(tokptr+atoplen); /* \atop followed by terminator */ 6236: if ( msgfp!=NULL && msglevel>=999 ) 6237: { fprintf(msgfp,"mimeprep> offset=%d rhs=\"%s\"\n", 6238: (int)(tokptr-expression),tokptr); 6239: fflush(msgfp); } 6240: if ( isalpha((int)termchar) ) /*we just have prefix of longer sym*/ 6241: { expptr = tokptr+atoplen; /* just resume search after prefix */ 6242: continue; } /* but don't process it */ 6243: leftbrace = findbraces(expression,tokptr); /* find left { */ 6244: rightbrace = findbraces(NULL,tokptr+atoplen-1); /* find right } */ 6245: if ( leftbrace==NULL || rightbrace==NULL ) 6246: { expptr += atoplen; continue; } /* skip command if didn't find */ 6247: else /* we have bracketed { \atop } */ 6248: { 6249: int leftlen = (int)(tokptr-leftbrace) - 1, /* #chars in left arg */ 6250: rightlen = (int)(rightbrace-tokptr) - atoplen, /* and in right*/ 6251: totlen = (int)(rightbrace-leftbrace) + 1; /*tot in { \atop }*/ 6252: char *open=atopdelims[2*isymbol], *close=atopdelims[2*isymbol+1]; 6253: char arg[8192], command[8192]; /* left/right args, new \atop{}{} */ 6254: *command = '\000'; /* start with null string */ 6255: if (open!=NULL) strcat(command,open); /* add open delim if needed */ 6256: strcat(command,atopsym); /* add command with \atop */ 6257: arg[0] = '{'; /* arg starts with { */ 6258: memcpy(arg+1,leftbrace+1,leftlen); /* extract left-hand arg */ 6259: arg[leftlen+1] = '\000'; /* and null terminate it */ 6260: strcat(command,arg); /* concatanate {left-arg to \atop */ 6261: strcat(command,"}{"); /* close left-arg, open right-arg */ 6262: memcpy(arg,tokptr+atoplen,rightlen); /* right-hand arg */ 6263: arg[rightlen] = '}'; /* add closing } */ 6264: arg[rightlen+1] = '\000'; /* and null terminate it */ 6265: if ( isthischar(*arg,WHITEMATH) ) /* 1st char was mandatory space */ 6266: {strsqueeze(arg,1);} /* so squeeze it out */ 6267: strcat(command,arg); /* concatanate right-arg} */ 6268: if (close!=NULL) strcat(command,close); /* add close delim if needed*/ 6269: strchange(totlen-2,leftbrace+1,command); /* {\atop} --> {\atop{}{}} */ 6270: expptr = leftbrace+strlen(command); /*resume search past \atop{}{}*/ 6271: } 6272: } /* --- end-of-while(tokptr!=NULL) --- */ 6273: } /* --- end-of-for(isymbol) --- */ 6274: /* ------------------------------------------------------------------------- 6275: back to caller with preprocessed expression 6276: -------------------------------------------------------------------------- */ 6277: if ( msgfp!=NULL && msglevel>=99 ) /* display preprocessed expression */ 6278: { fprintf(msgfp,"mimeprep> expression=\"\"%s\"\"\n",expression); 6279: fflush(msgfp); } 6280: return ( expression ); 6281: } /* --- end-of-function mimeprep() --- */ 6282: 6283: 6284: /* ========================================================================== 6285: * Function: strchange ( int nfirst, char *from, char *to ) 6286: * Purpose: Changes the nfirst leading chars of `from` to `to`. 6287: * For example, to change char x[99]="12345678" to "123ABC5678" 6288: * call strchange(1,x+3,"ABC") 6289: * -------------------------------------------------------------------------- 6290: * Arguments: nfirst (I) int containing #leading chars of `from` 6291: * that will be replace by `to` 6292: * from (I/O) char * to null-terminated string whose nfirst 6293: * leading chars will be replaced by `to` 6294: * to (I) char * to null-terminated string that will 6295: * replace the nfirst leading chars of `from` 6296: * -------------------------------------------------------------------------- 6297: * Returns: ( char * ) ptr to first char of input `from` 6298: * or NULL for any error. 6299: * -------------------------------------------------------------------------- 6300: * Notes: o If strlen(to)>nfirst, from must have memory past its null 6301: * (i.e., we don't do a realloc) 6302: * ======================================================================= */ 6303: /* --- entry point --- */ 6304: char *strchange ( int nfirst, char *from, char *to ) 6305: { 6306: /* ------------------------------------------------------------------------- 6307: Allocations and Declarations 6308: -------------------------------------------------------------------------- */ 6309: int tolen = (to==NULL?0:strlen(to)), /* #chars in replacement string */ 6310: nshift = abs(tolen-nfirst); /*need to shift from left or right*/ 6311: /* ------------------------------------------------------------------------- 6312: shift from left or right to accommodate replacement of its nfirst chars by to 6313: -------------------------------------------------------------------------- */ 6314: if ( tolen < nfirst ) /* shift left is easy */ 6315: {strsqueeze(from,nshift);} /* memmove avoids overlap memory */ 6316: if ( tolen > nfirst ) /* need more room at start of from */ 6317: { char *pfrom = from+strlen(from); /* ptr to null terminating from */ 6318: for ( ; pfrom>=from; pfrom-- ) /* shift all chars including null */ 6319: *(pfrom+nshift) = *pfrom; } /* shift chars nshift places right */ 6320: /* ------------------------------------------------------------------------- 6321: from has exactly the right number of free leading chars, so just put to there 6322: -------------------------------------------------------------------------- */ 6323: if ( tolen != 0 ) /* make sure to not empty or null */ 6324: memcpy(from,to,tolen); /* chars moved into place */ 6325: return ( from ); /* changed string back to caller */ 6326: } /* --- end-of-function strchange() --- */ 6327: 6328: 6329: /* ========================================================================== 6330: * Function: strreplace (char *string, char *from, char *to, int nreplace) 6331: * Purpose: Changes the first nreplace occurrences of 'from' to 'to' 6332: * in string, or all occurrences if nreplace=0. 6333: * -------------------------------------------------------------------------- 6334: * Arguments: string (I/0) char * to null-terminated string in which 6335: * occurrence of 'from' will be replaced by 'to' 6336: * from (I) char * to null-terminated string 6337: * to be replaced by 'to' 6338: * to (I) char * to null-terminated string that will 6339: * replace 'from' 6340: * nreplace (I) int containing (maximum) number of 6341: * replacements, or 0 to replace all. 6342: * -------------------------------------------------------------------------- 6343: * Returns: ( int ) number of replacements performed, 6344: * or 0 for no replacements or -1 for any error. 6345: * -------------------------------------------------------------------------- 6346: * Notes: o 6347: * ======================================================================= */ 6348: /* --- entry point --- */ 6349: int strreplace ( char *string, char *from, char *to, int nreplace ) 6350: { 6351: /* ------------------------------------------------------------------------- 6352: Allocations and Declarations 6353: -------------------------------------------------------------------------- */ 6354: int fromlen = (from==NULL?0:strlen(from)), /* #chars to be replaced */ 6355: tolen = (to==NULL?0:strlen(to)); /* #chars in replacement string */ 6356: char *pfrom = (char *)NULL, /*ptr to 1st char of from in string*/ 6357: *pstring = string, /*ptr past previously replaced from*/ 6358: *strchange(); /* change 'from' to 'to' */ 6359: int nreps = 0; /* #replacements returned to caller*/ 6360: /* ------------------------------------------------------------------------- 6361: repace occurrences of 'from' in string to 'to' 6362: -------------------------------------------------------------------------- */ 6363: if ( string == (char *)NULL /* no input string */ 6364: || (fromlen<1 && nreplace<=0) ) /* replacing empty string forever */ 6365: nreps = (-1); /* so signal error */ 6366: else /* args okay */ 6367: while (nreplace<1 || nreps<nreplace) /* up to #replacements requested */ 6368: { 6369: if ( fromlen > 0 ) /* have 'from' string */ 6370: pfrom = strstr(pstring,from); /*ptr to 1st char of from in string*/ 6371: else pfrom = pstring; /*or empty from at start of string*/ 6372: if ( pfrom == (char *)NULL ) break; /*no more from's, so back to caller*/ 6373: if ( strchange(fromlen,pfrom,to) /* leading 'from' changed to 'to' */ 6374: == (char *)NULL ) { nreps=(-1); break; } /* signal error to caller */ 6375: nreps++; /* count another replacement */ 6376: pstring = pfrom+tolen; /* pick up search after 'to' */ 6377: if ( *pstring == '\000' ) break; /* but quit at end of string */ 6378: } /* --- end-of-while() --- */ 6379: return ( nreps ); /* #replacements back to caller */ 6380: } /* --- end-of-function strreplace() --- */ 6381: 6382: 6383: /* ========================================================================== 6384: * Function: strwstr (char *string, char *substr, char *white, int *sublen) 6385: * Purpose: Find first substr in string, but wherever substr contains 6386: * a whitespace char (in white), string may contain any number 6387: * (including 0) of whitespace chars. If white contains I or i, 6388: * then match is case-insensitive (and I,i _not_ whitespace). 6389: * -------------------------------------------------------------------------- 6390: * Arguments: string (I) char * to null-terminated string in which 6391: * first occurrence of substr will be found 6392: * substr (I) char * to null-terminated string containing 6393: * "template" that will be searched for 6394: * white (I) char * to null-terminated string containing 6395: * whitespace chars. If NULL or empty, then 6396: * "~ \t\n\r\f\v" (WHITEMATH in mimetex.h) used. 6397: * If white contains I or i, then match is 6398: * case-insensitive (and I,i _not_ considered 6399: * whitespace). 6400: * sublen (O) address of int returning "length" of substr 6401: * found in string (which may be longer or 6402: * shorter than substr itself). 6403: * -------------------------------------------------------------------------- 6404: * Returns: ( char * ) ptr to first char of substr in string 6405: * or NULL if not found or for any error. 6406: * -------------------------------------------------------------------------- 6407: * Notes: o Wherever a single whitespace char appears in substr, 6408: * the corresponding position in string may contain any 6409: * number (including 0) of whitespace chars, e.g., 6410: * string="abc def" and string="abcdef" both match 6411: * substr="c d" at offset 2 of string. 6412: * o If substr="c d" (two spaces between c and d), 6413: * then string must have at least one space, so now "abcdef" 6414: * doesn't match. In general, the minimum number of spaces 6415: * in string is the number of spaces in substr minus 1 6416: * (so 1 space in substr permits 0 spaces in string). 6417: * o Embedded spaces are counted in sublen, e.g., 6418: * string="c d" (three spaces) matches substr="c d" 6419: * with sublen=5 returned. But string="ab c d" will 6420: * also match substr=" c d" returning sublen=5 and 6421: * a ptr to the "c". That is, the mandatory preceding 6422: * space is _not_ counted as part of the match. 6423: * But all the embedded space is counted. 6424: * (An inconsistent bug/feature is that mandatory 6425: * terminating space is counted.) 6426: * o Moreover, string="c d" matches substr=" c d", i.e., 6427: * the very beginning of a string is assumed to be preceded 6428: * by "virtual blanks". 6429: * ======================================================================= */ 6430: /* --- entry point --- */ 6431: char *strwstr ( char *string, char *substr, char *white, int *sublen ) 6432: { 6433: /* ------------------------------------------------------------------------- 6434: Allocations and Declarations 6435: -------------------------------------------------------------------------- */ 6436: char *psubstr=substr, *pstring=string,/*ptr to current char in substr,str*/ 6437: *pfound = (char *)NULL; /*ptr to found substr back to caller*/ 6438: char *pwhite=NULL, whitespace[256]; /* callers white whithout i,I */ 6439: int iscase = (white==NULL?1: /* case-sensitive if i,I in white */ 6440: strchr(white,'i')==NULL && strchr(white,'I')==NULL); 6441: int foundlen = 0; /* length of substr found in string*/ 6442: int nstrwhite=0, nsubwhite=0, /* #leading white chars in str,sub */ 6443: nminwhite=0; /* #mandatory leading white in str */ 6444: int nstrchars=0, nsubchars=0, /* #non-white chars to be matched */ 6445: isncmp=0; /*strncmp() or strncasecmp() result*/ 6446: /* ------------------------------------------------------------------------- 6447: Initialization 6448: -------------------------------------------------------------------------- */ 6449: /* --- set up whitespace --- */ 6450: strcpy(whitespace,WHITEMATH); /*default if no user input for white*/ 6451: if ( white != NULL ) /*user provided ptr to white string*/ 6452: if ( *white != '\000' ) { /*and it's not just an empty string*/ 6453: strcpy(whitespace,white); /* so use caller's white spaces */ 6454: while ( (pwhite=strchr(whitespace,'i')) != NULL ) /* have an embedded i */ 6455: {strsqueeze(pwhite,1);} /* so squeeze it out */ 6456: while ( (pwhite=strchr(whitespace,'I')) != NULL ) /* have an embedded I */ 6457: {strsqueeze(pwhite,1);} /* so squeeze it out */ 6458: if ( *whitespace == '\000' ) /* caller's white just had i,I */ 6459: strcpy(whitespace,WHITEMATH); } /* so revert back to default */ 6460: /* ------------------------------------------------------------------------- 6461: Find first occurrence of substr in string 6462: -------------------------------------------------------------------------- */ 6463: if ( string != NULL ) /* caller passed us a string ptr */ 6464: while ( *pstring != '\000' ) { /* break when string exhausted */ 6465: char *pstrptr = pstring; /* (re)start at next char in string*/ 6466: int leadingwhite = 0; /* leading whitespace */ 6467: psubstr = substr; /* start at beginning of substr */ 6468: foundlen = 0; /* reset length of found substr */ 6469: if ( substr != NULL ) /* caller passed us a substr ptr */ 6470: while ( *psubstr != '\000' ) { /*see if pstring begins with substr*/ 6471: /* --- check for end-of-string before finding match --- */ 6472: if ( *pstrptr == '\000' ) /* end-of-string without a match */ 6473: goto nextstrchar; /* keep trying with next char */ 6474: /* --- actual amount of whitespace in string and substr --- */ 6475: nsubwhite = strspn(psubstr,whitespace); /* #leading white chars in sub */ 6476: nstrwhite = strspn(pstrptr,whitespace); /* #leading white chars in str */ 6477: nminwhite = max2(0,nsubwhite-1); /* #mandatory leading white in str */ 6478: /* --- check for mandatory leading whitespace in string --- */ 6479: if ( pstrptr != string ) /*not mandatory at start of string*/ 6480: if ( nstrwhite < nminwhite ) /* too little leading white space */ 6481: goto nextstrchar; /* keep trying with next char */ 6482: /* ---hold on to #whitespace chars in string preceding substr match--- */ 6483: if ( pstrptr == pstring ) /* whitespace at start of substr */ 6484: leadingwhite = nstrwhite; /* save it as leadingwhite */ 6485: /* --- check for optional whitespace --- */ 6486: if ( psubstr != substr ) /* always okay at start of substr */ 6487: if ( nstrwhite>0 && nsubwhite<1 ) /* too much leading white space */ 6488: goto nextstrchar; /* keep trying with next char */ 6489: /* --- skip any leading whitespace in substr and string --- */ 6490: psubstr += nsubwhite; /* push past leading sub whitespace*/ 6491: pstrptr += nstrwhite; /* push past leading str whitespace*/ 6492: /* --- now get non-whitespace chars that we have to match --- */ 6493: nsubchars = strcspn(psubstr,whitespace); /* #non-white chars in sub */ 6494: nstrchars = strcspn(pstrptr,whitespace); /* #non-white chars in str */ 6495: if ( nstrchars < nsubchars ) /* too few chars for match */ 6496: goto nextstrchar; /* keep trying with next char */ 6497: /* --- see if next nsubchars are a match --- */ 6498: isncmp = (iscase? strncmp(pstrptr,psubstr,nsubchars): /*case sensitive*/ 6499: strncasecmp(pstrptr,psubstr,nsubchars)); /*case insensitive*/ 6500: if ( isncmp != 0 ) /* no match */ 6501: goto nextstrchar; /* keep trying with next char */ 6502: /* --- push past matched chars --- */ 6503: psubstr += nsubchars; pstrptr += nsubchars; /*nsubchars were matched*/ 6504: } /* --- end-of-while(*psubstr!='\000') --- */ 6505: pfound = pstring + leadingwhite; /* found match starting at pstring */ 6506: foundlen = (int)(pstrptr-pfound); /* consisting of this many chars */ 6507: goto end_of_job; /* back to caller */ 6508: /* ---failed to find substr, continue trying with next char in string--- */ 6509: nextstrchar: /* continue outer loop */ 6510: pstring++; /* bump to next char in string */ 6511: } /* --- end-of-while(*pstring!='\000') --- */ 6512: /* ------------------------------------------------------------------------- 6513: Back to caller with ptr to first occurrence of substr in string 6514: -------------------------------------------------------------------------- */ 6515: end_of_job: 6516: if ( msglevel>=999 && msgfp!=NULL) { /* debugging/diagnostic output */ 6517: fprintf(msgfp,"strwstr> str=\"%.72s\" sub=\"%s\" found at offset %d\n", 6518: string,substr,(pfound==NULL?(-1):(int)(pfound-string))); fflush(msgfp); } 6519: if ( sublen != NULL ) /*caller wants length of found substr*/ 6520: *sublen = foundlen; /* give it to him along with ptr */ 6521: return ( pfound ); /*ptr to first found substr, or NULL*/ 6522: } /* --- end-of-function strwstr() --- */ 6523: 6524: 6525: /* ========================================================================== 6526: * Function: strdetex ( s, mode ) 6527: * Purpose: Removes/replaces any LaTeX math chars in s 6528: * so that s can be displayed "verbatim", 6529: * e.g., for error messages. 6530: * -------------------------------------------------------------------------- 6531: * Arguments: s (I) char * to null-terminated string 6532: * whose math chars are to be removed/replaced 6533: * mode (I) int containing 0 to _not_ use macros (i.e., 6534: * mimeprep won't be called afterwards), 6535: * or containing 1 to use macros that will 6536: * be expanded by a subsequent call to mimeprep. 6537: * -------------------------------------------------------------------------- 6538: * Returns: ( char * ) ptr to "cleaned" copy of s 6539: * or "" (empty string) for any error. 6540: * -------------------------------------------------------------------------- 6541: * Notes: o The returned pointer addresses a static buffer, 6542: * so don't call strdetex() again until you're finished 6543: * with output from the preceding call. 6544: * ======================================================================= */ 6545: /* --- entry point --- */ 6546: char *strdetex ( char *s, int mode ) 6547: { 6548: /* ------------------------------------------------------------------------- 6549: Allocations and Declarations 6550: -------------------------------------------------------------------------- */ 6551: static char sbuff[4096]; /* copy of s with no math chars */ 6552: int strreplace(); /* replace _ with -, etc */ 6553: /* ------------------------------------------------------------------------- 6554: Make a clean copy of s 6555: -------------------------------------------------------------------------- */ 6556: /* --- check input --- */ 6557: *sbuff = '\000'; /* initialize in case of error */ 6558: if ( isempty(s) ) goto end_of_job; /* no input */ 6559: /* --- start with copy of s --- */ 6560: strninit(sbuff,s,2048); /* leave room for replacements */ 6561: /* --- make some replacements -- we *must* replace \ { } first --- */ 6562: strreplace(sbuff,"\\","\\backslash~\\!\\!",0); /*change all \'s to text*/ 6563: strreplace(sbuff,"{", "\\lbrace~\\!\\!",0); /*change all {'s to \lbrace*/ 6564: strreplace(sbuff,"}", "\\rbrace~\\!\\!",0); /*change all }'s to \rbrace*/ 6565: /* --- now our further replacements may contain \directives{args} --- */ 6566: if( mode >= 1 ) strreplace(sbuff,"_","\\_",0); /* change all _'s to \_ */ 6567: else strreplace(sbuff,"_","\\underline{\\qquad}",0); /*change them to text*/ 6568: if(0)strreplace(sbuff,"<","\\textlangle ",0); /* change all <'s to text */ 6569: if(0)strreplace(sbuff,">","\\textrangle ",0); /* change all >'s to text */ 6570: if(0)strreplace(sbuff,"$","\\textdollar ",0); /* change all $'s to text */ 6571: strreplace(sbuff,"$","\\$",0); /* change all $'s to \$ */ 6572: strreplace(sbuff,"&","\\&",0); /* change all &'s to \& */ 6573: strreplace(sbuff,"%","\\%",0); /* change all %'s to \% */ 6574: strreplace(sbuff,"#","\\#",0); /* change all #'s to \# */ 6575: /*strreplace(sbuff,"~","\\~",0);*/ /* change all ~'s to \~ */ 6576: strreplace(sbuff,"^","{\\fs{+2}\\^}",0); /* change all ^'s to \^ */ 6577: end_of_job: 6578: return ( sbuff ); /* back with clean copy of s */ 6579: } /* --- end-of-function strdetex() --- */ 6580: 6581: 6582: /* ========================================================================== 6583: * Function: strtexchr ( char *string, char *texchr ) 6584: * Purpose: Find first texchr in string, but texchr must be followed 6585: * by non-alpha 6586: * -------------------------------------------------------------------------- 6587: * Arguments: string (I) char * to null-terminated string in which 6588: * first occurrence of delim will be found 6589: * texchr (I) char * to null-terminated string that 6590: * will be searched for 6591: * -------------------------------------------------------------------------- 6592: * Returns: ( char * ) ptr to first char of texchr in string 6593: * or NULL if not found or for any error. 6594: * -------------------------------------------------------------------------- 6595: * Notes: o texchr should contain its leading \, e.g., "\\left" 6596: * ======================================================================= */ 6597: /* --- entry point --- */ 6598: char *strtexchr ( char *string, char *texchr ) 6599: { 6600: /* ------------------------------------------------------------------------- 6601: Allocations and Declarations 6602: -------------------------------------------------------------------------- */ 6603: char delim, *ptexchr=(char *)NULL; /* ptr returned to caller*/ 6604: char *pstring = string; /* start or continue up search here*/ 6605: int texchrlen = (texchr==NULL?0:strlen(texchr)); /* #chars in texchr */ 6606: /* ------------------------------------------------------------------------- 6607: locate texchr in string 6608: -------------------------------------------------------------------------- */ 6609: if ( string != (char *)NULL /* check that we got input string */ 6610: && texchrlen > 0 ) { /* and a texchr to search for */ 6611: while ( (ptexchr=strstr(pstring,texchr)) /* look for texchr in string */ 6612: != (char *)NULL ) /* found it */ 6613: if ( (delim = ptexchr[texchrlen]) /* char immediately after texchr */ 6614: == '\000' ) break; /* texchr at very end of string */ 6615: else /* if there are chars after texchr */ 6616: if ( isalpha(delim) /*texchr is prefix of longer symbol*/ 6617: || 0 ) /* other tests to be determined */ 6618: pstring = ptexchr + texchrlen; /* continue search after texchr */ 6619: else /* passed all tests */ 6620: break; } /*so return ptr to texchr to caller*/ 6621: return ( ptexchr ); /* ptr to texchar back to caller */ 6622: } /* --- end-of-function strtexchr() --- */ 6623: 6624: 6625: /* ========================================================================== 6626: * Function: findbraces ( char *expression, char *command ) 6627: * Purpose: If expression!=NULL, finds opening left { preceding command; 6628: * if expression==NULL, finds closing right } after command. 6629: * For example, to parse out {a+b\over c+d} call findbraces() 6630: * twice. 6631: * -------------------------------------------------------------------------- 6632: * Arguments: expression (I) NULL to find closing right } after command, 6633: * or char * to null-terminated string to find 6634: * left opening { preceding command. 6635: * command (I) char * to null-terminated string whose 6636: * first character is usually the \ of \command 6637: * -------------------------------------------------------------------------- 6638: * Returns: ( char * ) ptr to either opening { or closing }, 6639: * or NULL for any error. 6640: * -------------------------------------------------------------------------- 6641: * Notes: o 6642: * ======================================================================= */ 6643: /* --- entry point --- */ 6644: char *findbraces ( char *expression, char *command ) 6645: { 6646: /* ------------------------------------------------------------------------- 6647: Allocations and Declarations 6648: -------------------------------------------------------------------------- */ 6649: int isopen = (expression==NULL?0:1); /* true to find left opening { */ 6650: char *left="{", *right="}", /* delims bracketing {x\command y} */ 6651: *delim = (isopen?left:right), /* delim we want, { if isopen */ 6652: *match = (isopen?right:left), /* matching delim, } if isopen */ 6653: *brace = NULL; /* ptr to delim returned to caller */ 6654: int inc = (isopen?-1:+1); /* pointer increment */ 6655: int level = 1; /* nesting level, for {{}\command} */ 6656: char *ptr = command; /* start search here */ 6657: int setbrace = 1; /* true to set {}'s if none found */ 6658: /* ------------------------------------------------------------------------- 6659: search for left opening { before command, or right closing } after command 6660: -------------------------------------------------------------------------- */ 6661: while ( 1 ) /* search for brace, or until end */ 6662: { 6663: /* --- next char to check for delim --- */ 6664: ptr += inc; /* bump ptr left or right */ 6665: /* --- check for beginning or end of expression --- */ 6666: if ( isopen ) /* going left, check for beginning */ 6667: { if ( ptr < expression ) break; } /* went before start of string */ 6668: else { if ( *ptr == '\000' ) break; } /* went past end of string */ 6669: /* --- don't check this char if it's escaped --- */ 6670: if ( !isopen || ptr>expression ) /* very first char can't be escaped*/ 6671: if ( isthischar(*(ptr-1),ESCAPE) ) /* escape char precedes current */ 6672: continue; /* so don't check this char */ 6673: /* --- check for delim --- */ 6674: if ( isthischar(*ptr,delim) ) /* found delim */ 6675: if ( --level == 0 ) /* and it's not "internally" nested*/ 6676: { brace = ptr; /* set ptr to brace */ 6677: goto end_of_job; } /* and return it to caller */ 6678: /* --- check for matching delim --- */ 6679: if ( isthischar(*ptr,match) ) /* found matching delim */ 6680: level++; /* so bump nesting level */ 6681: } /* --- end-of-while(1) --- */ 6682: end_of_job: 6683: if ( brace == (char *)NULL ) /* open{ or close} not found */ 6684: if ( setbrace ) /* want to force one at start/end? */ 6685: brace = ptr; /* { before expressn, } after cmmnd*/ 6686: return ( brace ); /*back to caller with delim or NULL*/ 6687: } /* --- end-of-function findbraces() --- */ 6688: 6689: 6690: /* ========================================================================== 6691: * Function: strpspn ( char *s, char *reject, char *segment ) 6692: * Purpose: finds the initial segment of s containing no chars 6693: * in reject that are outside (), [] and {} parens, e.g., 6694: * strpspn("abc(---)def+++","+-",segment) returns 6695: * segment="abc(---)def" and a pointer to the first '+' in s 6696: * because the -'s are enclosed in () parens. 6697: * -------------------------------------------------------------------------- 6698: * Arguments: s (I) (char *)pointer to null-terminated string 6699: * whose initial segment is desired 6700: * reject (I) (char *)pointer to null-terminated string 6701: * containing the "reject chars" 6702: * segment (O) (char *)pointer returning null-terminated 6703: * string comprising the initial segment of s 6704: * that contains non-rejected chars outside 6705: * (),[],{} parens, i.e., all the chars up to 6706: * but not including the returned pointer. 6707: * (That's the entire string if no non-rejected 6708: * chars are found.) 6709: * -------------------------------------------------------------------------- 6710: * Returns: ( char * ) pointer to first reject-char found in s 6711: * outside parens, or a pointer to the 6712: * terminating '\000' of s if there are 6713: * no reject chars in s outside all () parens. 6714: * -------------------------------------------------------------------------- 6715: * Notes: o the return value is _not_ like strcspn()'s 6716: * o improperly nested (...[...)...] are not detected, 6717: * but are considered "balanced" after the ] 6718: * o if reject not found, segment returns the entire string s 6719: * o leading/trailing whitespace is trimmed from returned segment 6720: * ======================================================================= */ 6721: /* --- entry point --- */ 6722: char *strpspn ( char *s, char *reject, char *segment ) 6723: { 6724: /* ------------------------------------------------------------------------- 6725: Allocations and Declarations 6726: -------------------------------------------------------------------------- */ 6727: char *ps = s; /* current pointer into s */ 6728: int depth = 0; /* () paren nesting level */ 6729: int seglen=0, maxseg=2047; /* segment length, max allowed */ 6730: /* ------------------------------------------------------------------------- 6731: initialization 6732: -------------------------------------------------------------------------- */ 6733: /* --- check arguments --- */ 6734: if ( isempty(s) ) /* no input string supplied */ 6735: goto end_of_job; /* no reject chars supplied */ 6736: /* ------------------------------------------------------------------------- 6737: find first char from s outside () parens (and outside ""'s) and in reject 6738: -------------------------------------------------------------------------- */ 6739: while ( *ps != '\000' ) { /* search till end of input string */ 6740: if ( isthischar(*ps,"([{") ) depth++; /* push another paren */ 6741: if ( isthischar(*ps,")]}") ) depth--; /* or pop another paren */ 6742: if ( depth < 1 ) { /* we're outside all parens */ 6743: if ( isempty(reject) ) break; /* no reject so break immediately */ 6744: if ( isthischar(*ps,reject) ) break; } /* only break on a reject char */ 6745: if ( segment != NULL ) /* caller gave us segment */ 6746: if ( seglen < maxseg ) /* don't overflow segment buffer */ 6747: memcpy(segment+seglen,ps,1); /* so copy non-reject char */ 6748: seglen += 1; ps += 1; /* bump to next char */ 6749: } /* --- end-of-while(*ps!=0) --- */ 6750: end_of_job: 6751: if ( segment != NULL ) { /* caller gave us segment */ 6752: if ( isempty(reject) ) { /* no reject char */ 6753: segment[min2(seglen,maxseg)] = *ps; seglen++; } /*closing )]} to seg*/ 6754: segment[min2(seglen,maxseg)] = '\000'; /* null-terminate the segment */ 6755: trimwhite(segment); } /* trim leading/trailing whitespace*/ 6756: return ( ps ); /* back to caller */ 6757: } /* --- end-of-function strpspn() --- */ 6758: 6759: 6760: /* ========================================================================== 6761: * Function: isstrstr ( char *string, char *snippets, int iscase ) 6762: * Purpose: determine whether any substring of 'string' 6763: * matches any of the comma-separated list of 'snippets', 6764: * ignoring case if iscase=0. 6765: * -------------------------------------------------------------------------- 6766: * Arguments: string (I) char * containing null-terminated 6767: * string that will be searched for 6768: * any one of the specified snippets 6769: * snippets (I) char * containing null-terminated, 6770: * comma-separated list of snippets 6771: * to be searched for in string 6772: * iscase (I) int containing 0 for case-insensitive 6773: * comparisons, or 1 for case-sensitive 6774: * -------------------------------------------------------------------------- 6775: * Returns: ( int ) 1 if any snippet is a substring of 6776: * string, 0 if not 6777: * -------------------------------------------------------------------------- 6778: * Notes: o 6779: * ======================================================================= */ 6780: /* --- entry point --- */ 6781: int isstrstr ( char *string, char *snippets, int iscase ) 6782: { 6783: /* ------------------------------------------------------------------------- 6784: Allocations and Declarations 6785: -------------------------------------------------------------------------- */ 6786: int status = 0; /*1 if any snippet found in string*/ 6787: char snip[256], *snipptr = snippets, /* munge through each snippet */ 6788: delim = ',', *delimptr = NULL; /* separated by delim's */ 6789: char stringcp[4096], *cp = stringcp; /*maybe lowercased copy of string*/ 6790: /* ------------------------------------------------------------------------- 6791: initialization 6792: -------------------------------------------------------------------------- */ 6793: /* --- arg check --- */ 6794: if ( string==NULL || snippets==NULL ) goto end_of_job; /* missing arg */ 6795: if ( *string=='\000' || *snippets=='\000' ) goto end_of_job; /* empty arg */ 6796: /* --- copy string and lowercase it if case-insensitive --- */ 6797: strninit(stringcp,string,4064); /* local copy of string */ 6798: if ( !iscase ) /* want case-insensitive compares */ 6799: for ( cp=stringcp; *cp != '\000'; cp++ ) /* so for each string char */ 6800: if ( isupper(*cp) ) *cp = tolower(*cp); /*lowercase any uppercase chars*/ 6801: /* ------------------------------------------------------------------------- 6802: extract each snippet and see if it's a substring of string 6803: -------------------------------------------------------------------------- */ 6804: while ( snipptr != NULL ) /* while we still have snippets */ 6805: { 6806: /* --- extract next snippet --- */ 6807: if ( (delimptr = strchr(snipptr,delim)) /* locate next comma delim */ 6808: == NULL ) /*not found following last snippet*/ 6809: { strninit(snip,snipptr,255); /* local copy of last snippet */ 6810: snipptr = NULL; } /* signal end-of-string */ 6811: else /* snippet ends just before delim */ 6812: { int sniplen = (int)(delimptr-snipptr) - 1; /* #chars in snippet */ 6813: memcpy(snip,snipptr,sniplen); /* local copy of snippet chars */ 6814: snip[sniplen] = '\000'; /* null-terminated snippet */ 6815: snipptr = delimptr + 1; } /* next snippet starts after delim */ 6816: /* --- lowercase snippet if case-insensitive --- */ 6817: if ( !iscase ) /* want case-insensitive compares */ 6818: for ( cp=snip; *cp != '\000'; cp++ ) /* so for each snippet char */ 6819: if ( isupper(*cp) ) *cp=tolower(*cp); /*lowercase any uppercase chars*/ 6820: /* --- check if snippet in string --- */ 6821: if ( strstr(stringcp,snip) != NULL ) /* found snippet in string */ 6822: { status = 1; /* so reset return status */ 6823: break; } /* no need to check any further */ 6824: } /* --- end-of-while(*snipptr!=0) --- */ 6825: end_of_job: return ( status ); /*1 if snippet found in list, else 0*/ 6826: } /* --- end-of-function isstrstr() --- */ 6827: 6828: 6829: /* ========================================================================== 6830: * Function: isnumeric ( s ) 6831: * Purpose: determine if s is an integer 6832: * -------------------------------------------------------------------------- 6833: * Arguments: s (I) (char *)pointer to null-terminated string 6834: * that's checked for a leading + or - 6835: * followed by digits 6836: * -------------------------------------------------------------------------- 6837: * Returns: ( int ) 1 if s is numeric, 0 if it is not 6838: * -------------------------------------------------------------------------- 6839: * Notes: o 6840: * ======================================================================= */ 6841: /* --- entry point --- */ 6842: int isnumeric ( char *s ) 6843: { 6844: /* ------------------------------------------------------------------------- 6845: determine whether s is an integer 6846: -------------------------------------------------------------------------- */ 6847: int status = 0; /* return 0 if not numeric, 1 if is*/ 6848: char *p = s; /* pointer into s */ 6849: if ( isempty(s) ) goto end_of_job; /* missing arg or empty string */ 6850: skipwhite(p); /*check for leading +or- after space*/ 6851: if ( *p=='+' || *p=='-' ) p++; /* skip leading + or - */ 6852: for ( ; *p != '\000'; p++ ) { /* check rest of s for digits */ 6853: if ( isdigit(*p) ) continue; /* still got uninterrupted digits */ 6854: if ( !isthischar(*p,WHITESPACE) ) goto end_of_job; /* non-numeric char */ 6855: skipwhite(p); /* skip all subsequent whitespace */ 6856: if ( *p == '\000' ) break; /* trailing whitespace okay */ 6857: goto end_of_job; /* embedded whitespace non-numeric */ 6858: } /* --- end-of-for(*p) --- */ 6859: status = 1; /* numeric after checks succeeded */ 6860: end_of_job: 6861: return ( status ); /*back to caller with 1=string, 0=no*/ 6862: } /* --- end-of-function isnumeric() --- */ 6863: 6864: 6865: /* ========================================================================== 6866: * Function: evalterm ( STORE *store, char *term ) 6867: * Purpose: evaluates a term 6868: * -------------------------------------------------------------------------- 6869: * Arguments: store (I/O) STORE * containing environment 6870: * in which term is to be evaluated 6871: * term (I) char * containing null-terminated string 6872: * with a term like "3" or "a" or "a+3" 6873: * whose value is to be determined 6874: * -------------------------------------------------------------------------- 6875: * Returns: ( int ) value of term, 6876: * or NOVALUE for any error 6877: * -------------------------------------------------------------------------- 6878: * Notes: o Also evaluates index?a:b:c:etc, returning a if index<=0, 6879: * b if index=1, etc, and the last value if index is too large. 6880: * Each a:b:c:etc can be another expression, including another 6881: * (index?a:b:c:etc) which must be enclosed in parentheses. 6882: * ======================================================================= */ 6883: /* --- entry point --- */ 6884: int evalterm ( STORE *store, char *term ) 6885: { 6886: /* ------------------------------------------------------------------------- 6887: Allocations and Declarations 6888: -------------------------------------------------------------------------- */ 6889: int termval = 0; /* term value returned to caller */ 6890: char token[2048] = "\000", /* copy term */ 6891: *delim = NULL; /* delim '(' or '?' in token */ 6892: /*int evalwff(),*/ /* recurse to evaluate terms */ 6893: /* evalfunc();*/ /* evaluate function(arg1,arg2,...)*/ 6894: char *strpspn(); /* span delims */ 6895: int getstore(); /* lookup variables */ 6896: int isnumeric(); /* numeric=constant, else variable */ 6897: static int evaltermdepth = 0; /* recursion depth */ 6898: int novalue = (-89123456); /* dummy (for now) error signal */ 6899: /* ------------------------------------------------------------------------- 6900: Initialization 6901: -------------------------------------------------------------------------- */ 6902: if ( ++evaltermdepth > 99 ) goto end_of_job; /*probably recursing forever*/ 6903: if ( store==NULL || isempty(term) ) goto end_of_job; /*check for missing arg*/ 6904: skipwhite(term); /* skip any leading whitespace */ 6905: /* ------------------------------------------------------------------------- 6906: First look for conditional of the form term?term:term:... 6907: -------------------------------------------------------------------------- */ 6908: /* ---left-hand part of conditional is chars preceding "?" outside ()'s--- */ 6909: delim = strpspn(term,"?",token); /* chars preceding ? outside () */ 6910: if ( *delim != '\000' ) { /* found conditional expression */ 6911: int ncolons = 0; /* #colons we've found so far */ 6912: if ( *token != '\000' ) /* evaluate "index" value on left */ 6913: if ( (termval=evalterm(store,token)) /* evaluate left-hand term */ 6914: == novalue ) goto end_of_job; /* return error if failed */ 6915: while ( *delim != '\000' ) { /* still have chars in term */ 6916: delim++; *token='\000'; /* initialize for next "value:" */ 6917: if ( *delim == '\000' ) break; /* no more values */ 6918: delim = strpspn(delim,":",token); /* chars preceding : outside () */ 6919: if ( ncolons++ >= termval ) break; /* have corresponding term */ 6920: } /* --- end-of-while(*delim!='\000')) --- */ 6921: if ( *token != '\000' ) /* have x:x:value:x:x on right */ 6922: termval=evalterm(store,token); /* so evaluate it */ 6923: goto end_of_job; /* return result to caller */ 6924: } /* --- end-of-if(*delim!='\000')) --- */ 6925: /* ------------------------------------------------------------------------- 6926: evaluate a+b recursively 6927: -------------------------------------------------------------------------- */ 6928: /* --- left-hand part of term is chars preceding "/+-*%" outside ()'s --- */ 6929: term = strpspn(term,"/+-*%",token); /* chars preceding /+-*% outside ()*/ 6930: /* --- evaluate a+b, a-b, etc --- */ 6931: if ( *term != '\000' ) { /* found arithmetic operation */ 6932: int leftval=0, rightval=0; /* init leftval for unary +a or -a */ 6933: if ( *token != '\000' ) /* or eval for binary a+b or a-b */ 6934: if ( (leftval=evalterm(store,token)) /* evaluate left-hand term */ 6935: == novalue ) goto end_of_job; /* return error if failed */ 6936: if ( (rightval=evalterm(store,term+1)) /* evaluate right-hand term */ 6937: == novalue ) goto end_of_job; /* return error if failed */ 6938: switch ( *term ) { /* perform requested arithmetic */ 6939: default: break; /* internal error */ 6940: case '+': termval = leftval+rightval; break; /* addition */ 6941: case '-': termval = leftval-rightval; break; /* subtraction */ 6942: case '*': termval = leftval*rightval; break; /* multiplication */ 6943: case '/': if ( rightval != 0 ) /* guard against divide by zero */ 6944: termval = leftval/rightval; break; /* integer division */ 6945: case '%': if ( rightval != 0 ) /* guard against divide by zero */ 6946: termval = leftval%rightval; break; /*left modulo right */ 6947: } /* --- end-of-switch(*relation) --- */ 6948: goto end_of_job; /* return result to caller */ 6949: } /* --- end-of-if(*term!='\000')) --- */ 6950: /* ------------------------------------------------------------------------- 6951: check for parenthesized expression or term of the form function(arg1,arg2,...) 6952: -------------------------------------------------------------------------- */ 6953: if ( (delim = strchr(token,'(')) != NULL ) { /* token contains a ( */ 6954: /* --- strip trailing paren (if there hopefully is one) --- */ 6955: int toklen = strlen(token); /* total #chars in token */ 6956: if ( token[toklen-1] == ')' ) /* found matching ) at end of token*/ 6957: token[--toklen] = '\000'; /* remove trailing ) */ 6958: /* --- handle parenthesized subexpression --- */ 6959: if ( *token == '(' ) { /* have parenthesized expression */ 6960: strsqueeze(token,1); /* so squeeze out leading ( */ 6961: /* --- evaluate edited term --- */ 6962: trimwhite(token); /* trim leading/trailing whitespace*/ 6963: termval = evalterm(store,token); } /* evaluate token recursively */ 6964: /* --- handle function(arg1,arg2,...) --- */ 6965: else { /* have function(arg1,arg2,...) */ 6966: *delim = '\000'; /* separate function name and args */ 6967: /*termval = evalfunc(store,token,delim+1);*/ } /* evaluate function */ 6968: goto end_of_job; } /* return result to caller */ 6969: /* ------------------------------------------------------------------------- 6970: evaluate constants directly, or recursively evaluate variables, etc 6971: -------------------------------------------------------------------------- */ 6972: if ( *token != '\000' ) { /* empty string */ 6973: if ( isnumeric(token) ) /* have a constant */ 6974: termval = atoi(token); /* convert ascii-to-int */ 6975: else { /* variable or "stored proposition"*/ 6976: termval = getstore(store,token); } /* look up token */ 6977: } /* --- end-of-if(*token!=0) --- */ 6978: /* ------------------------------------------------------------------------- 6979: back to caller with truth value of proposition 6980: -------------------------------------------------------------------------- */ 6981: end_of_job: 6982: /* --- back to caller --- */ 6983: if ( evaltermdepth > 0 ) evaltermdepth--; /* pop recursion depth */ 6984: return ( termval ); /* back to caller with value */ 6985: } /* --- end-of-function evalterm() --- */ 6986: 6987: 6988: /* ========================================================================== 6989: * Function: getstore ( store, identifier ) 6990: * Purpose: finds identifier in store and returns corresponding value 6991: * -------------------------------------------------------------------------- 6992: * Arguments: store (I) (STORE *)pointer to store containing 6993: * the desired identifier 6994: * identifier (I) (char *)pointer to null-terminated string 6995: * containing the identifier whose value 6996: * is to be returned 6997: * -------------------------------------------------------------------------- 6998: * Returns: ( int ) identifier's corresponding value, 6999: * or 0 if identifier not found (or any error) 7000: * -------------------------------------------------------------------------- 7001: * Notes: o 7002: * ======================================================================= */ 7003: /* --- entry point --- */ 7004: int getstore ( STORE *store, char *identifier ) 7005: { 7006: /* ------------------------------------------------------------------------- 7007: Allocations and Declarations 7008: -------------------------------------------------------------------------- */ 7009: int value = 0; /* store[istore].value for identifier */ 7010: int istore=0; /* store[] index containing identifier */ 7011: char seek[512], hide[512]; /* identifier arg, identifier in store */ 7012: /* --- first check args --- */ 7013: if ( store==NULL || isempty(identifier)) goto end_of_job; /* missing arg */ 7014: strninit(seek,identifier,500); /* local copy of caller's identifier */ 7015: trimwhite(seek); /* remove leading/trailing whitespace */ 7016: /* --- loop over store --- */ 7017: for ( istore=0; istore<MAXSTORE; istore++ ) { /* until end-of-table */ 7018: char *idstore = store[istore].identifier; /* ptr to identifier in store */ 7019: if ( isempty(idstore) ) /* empty id signals eot */ 7020: break; /* de-reference any default/error value */ 7021: strninit(hide,idstore,500); /* local copy of store[] identifier */ 7022: trimwhite(hide); /* remove leading/trailing whitespace */ 7023: if ( !strcmp(hide,seek) ) /* found match */ 7024: break; /* de-reference corresponding value */ 7025: } /* --- end-of-for(istore) --- */ 7026: if ( store[istore].value != NULL ) /* address of int supplied */ 7027: value = *(store[istore].value); /* return de-referenced int */ 7028: end_of_job: 7029: return ( value ); /* store->values[istore] or NULL */ 7030: } /* --- end-of-function getstore() --- */ 7031: 7032: 7033: /* ========================================================================== 7034: * Functions: int unescape_url ( char *url, int isescape ) 7035: * char x2c ( char *what ) 7036: * Purpose: unescape_url replaces 3-character sequences %xx in url 7037: * with the single character represented by hex xx. 7038: * x2c returns the single character represented by hex xx 7039: * passed as a 2-character sequence in what. 7040: * -------------------------------------------------------------------------- 7041: * Arguments: url (I) char * containing null-terminated 7042: * string with embedded %xx sequences 7043: * to be converted. 7044: * isescape (I) int containing 1 to _not_ unescape 7045: * \% sequences (0 would be NCSA default) 7046: * what (I) char * whose first 2 characters are 7047: * interpreted as ascii representations 7048: * of hex digits. 7049: * -------------------------------------------------------------------------- 7050: * Returns: ( int ) unescape_url always returns 0. 7051: * ( char ) x2c returns the single char 7052: * corresponding to hex xx passed in what. 7053: * -------------------------------------------------------------------------- 7054: * Notes: o These two functions were taken verbatim from util.c in 7055: * ftp://ftp.ncsa.uiuc.edu/Web/httpd/Unix/ncsa_httpd/cgi/ncsa-default.tar.Z 7056: * o Not quite "verbatim" -- I added the "isescape logic" 4-Dec-03 7057: * so unescape_url() can be safely applied to input which may or 7058: * may not have been url-encoded. (Note: currently, all calls 7059: * to unescape_url() pass iescape=0, so it's not used.) 7060: * o Added +++'s to blank xlation on 24-Sep-06 7061: * o Added ^M,^F,etc to blank xlation 0n 01-Oct-06 7062: * ======================================================================= */ 7063: /* --- entry point --- */ 7064: int unescape_url(char *url, int isescape) { 7065: int x=0,y=0,prevescape=0,gotescape=0; 7066: int xlateplus = (isplusblank==1?1:0); /* true to xlate plus to blank */ 7067: int strreplace(); /* replace + with blank, if needed */ 7068: char x2c(); 7069: static char *hex="0123456789ABCDEFabcdef"; 7070: /* --- 7071: * xlate ctrl chars to blanks 7072: * -------------------------- */ 7073: if ( 1 ) { /* xlate ctrl chars to blanks */ 7074: char *ctrlchars = "\n\t\v\b\r\f\a\015"; 7075: int seglen = strspn(url,ctrlchars); /*initial segment with ctrlchars*/ 7076: int urllen = strlen(url); /* total length of url string */ 7077: /* --- first, entirely remove ctrlchars from beginning and end --- */ 7078: if ( seglen > 0 ) { /*have ctrlchars at start of string*/ 7079: strsqueeze(url,seglen); /* squeeze out initial ctrlchars */ 7080: urllen -= seglen; } /* string is now shorter */ 7081: while ( --urllen >= 0 ) /* now remove ctrlchars from end */ 7082: if ( isthischar(url[urllen],ctrlchars) ) /* ctrlchar at end */ 7083: url[urllen] = '\000'; /* re-terminate string before it */ 7084: else break; /* or we're done */ 7085: urllen++; /* length of url string */ 7086: /* --- now, replace interior ctrlchars with ~ blanks --- */ 7087: while ( (seglen=strcspn(url,ctrlchars)) < urllen ) /*found a ctrlchar*/ 7088: url[seglen] = '~'; /* replace ctrlchar with ~ */ 7089: } /* --- end-of-if(1) --- */ 7090: /* --- 7091: * xlate +'s to blanks if requested or if deemed necessary 7092: * ------------------------------------------------------- */ 7093: if ( isplusblank == (-1) ) { /*determine whether or not to xlate*/ 7094: char *searchfor[] = { " ","%20", "%2B","%2b", "+++","++", 7095: "+=+","+-+", NULL }; 7096: int isearch = 0, /* searchfor[] index */ 7097: nfound[11] = {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1}; /*#occurrences*/ 7098: /* --- locate occurrences of searchfor[] strings in url --- */ 7099: for ( isearch=0; searchfor[isearch] != NULL; isearch++ ) { 7100: char *psearch = url; /* start search at beginning */ 7101: nfound[isearch] = 0; /* init #occurrences count */ 7102: while ( (psearch=strstr(psearch,searchfor[isearch])) != NULL ) { 7103: nfound[isearch] += 1; /* count another occurrence */ 7104: psearch += strlen(searchfor[isearch]); } /*resume search after it*/ 7105: } /* --- end-of-for(isearch) --- */ 7106: /* --- apply some common-sense logic --- */ 7107: if ( nfound[0] + nfound[1] > 0 ) /* we have actual " "s or "%20"s */ 7108: isplusblank = xlateplus = 0; /* so +++'s aren't blanks */ 7109: if ( nfound[2] + nfound[3] > 0 ) { /* we have "%2B" for +++'s */ 7110: if ( isplusblank != 0 ) /* and haven't disabled xlation */ 7111: isplusblank = xlateplus = 1; /* so +++'s are blanks */ 7112: else /* we have _both_ "%20" and "%2b" */ 7113: xlateplus = 0; } /* tough call */ 7114: if ( nfound[4] + nfound[5] > 0 /* we have multiple ++'s */ 7115: || nfound[6] + nfound[7] > 0 ) /* or we have a +=+ or +-+ */ 7116: if ( isplusblank != 0 ) /* and haven't disabled xlation */ 7117: xlateplus = 1; /* so xlate +++'s to blanks */ 7118: } /* --- end-of-if(isplusblank==-1) --- */ 7119: if ( xlateplus > 0 ) { /* want +'s xlated to blanks */ 7120: char *xlateto[] = { ""," "," "," + "," "," "," "," "," " }; 7121: while ( xlateplus > 0 ) { /* still have +++'s to xlate */ 7122: char plusses[99] = "++++++++++++++++++++"; /* longest +++ string */ 7123: plusses[xlateplus] = '\000'; /* null-terminate +++'s */ 7124: strreplace(url,plusses,xlateto[xlateplus],0); /* xlate +++'s */ 7125: xlateplus--; /* next shorter +++ string */ 7126: } /* --- end-of-while(xlateplus>0) --- */ 7127: } /* --- end-of-if(xlateplus) --- */ 7128: isplusblank = 0; /* don't iterate this xlation */ 7129: /* --- 7130: * xlate %nn to corresponding char 7131: * ------------------------------- */ 7132: for(;url[y];++x,++y) { 7133: gotescape = prevescape; 7134: prevescape = (url[x]=='\\'); 7135: if((url[x] = url[y]) == '%') 7136: if(!isescape || !gotescape) 7137: if(isthischar(url[y+1],hex) 7138: && isthischar(url[y+2],hex)) 7139: { url[x] = x2c(&url[y+1]); 7140: y+=2; } 7141: } 7142: url[x] = '\0'; 7143: return 0; 7144: } /* --- end-of-function unescape_url() --- */ 7145: /* --- entry point --- */ 7146: char x2c(char *what) { 7147: char digit; 7148: digit = (what[0] >= 'A' ? ((what[0] & 0xdf) - 'A')+10 : (what[0] - '0')); 7149: digit *= 16; 7150: digit += (what[1] >= 'A' ? ((what[1] & 0xdf) - 'A')+10 : (what[1] - '0')); 7151: return(digit); 7152: } /* --- end-of-function x2c() --- */ 7153: #endif /* PART2 */ 7154: 7155: /* --- 7156: * PART3 7157: * ------ */ 7158: #if !defined(PARTS) || defined(PART3) 7159: /* ========================================================================== 7160: * Function: rasterize ( expression, size ) 7161: * Purpose: returns subraster corresponding to (a valid LaTeX) expression 7162: * at font size 7163: * -------------------------------------------------------------------------- 7164: * Arguments: expression (I) char * to first char of null-terminated 7165: * string containing valid LaTeX expression 7166: * to be rasterized 7167: * size (I) int containing 0-4 default font size 7168: * -------------------------------------------------------------------------- 7169: * Returns: ( subraster * ) ptr to subraster corresponding to expression, 7170: * or NULL for any parsing error. 7171: * -------------------------------------------------------------------------- 7172: * Notes: o This is mimeTeX's "main" reusable entry point. Easy to use: 7173: * just call it with a LaTeX expression, and get back a bitmap 7174: * of that expression. Then do what you want with the bitmap. 7175: * ======================================================================= */ 7176: /* --- entry point --- */ 7177: subraster *rasterize ( char *expression, int size ) 7178: { 7179: /* ------------------------------------------------------------------------- 7180: Allocations and Declarations 7181: -------------------------------------------------------------------------- */ 7182: char *preamble(), pretext[512]; /* process preamble, if present */ 7183: char chartoken[MAXSUBXSZ+1], *texsubexpr(), /*get subexpression from expr*/ 7184: *subexpr = chartoken; /* token may be parenthesized expr */ 7185: int isbrace(); /* check subexpr for braces */ 7186: mathchardef *symdef, *get_symdef(); /*get mathchardef struct for symbol*/ 7187: int ligdef, get_ligature(); /*get symtable[] index for ligature*/ 7188: int natoms=0; /* #atoms/tokens processed so far */ 7189: int type_raster(); /* display debugging output */ 7190: subraster *rasterize(), /* recurse */ 7191: *rastparen(), /* handle parenthesized subexpr's */ 7192: *rastlimits(); /* handle sub/superscripted expr's */ 7193: subraster *rastcat(), /* concatanate atom subrasters */ 7194: *subrastcpy(), /* copy final result if a charaster*/ 7195: *new_subraster(); /* new subraster for isstring mode */ 7196: subraster *get_charsubraster(), /* character subraster */ 7197: *sp=NULL, *prevsp=NULL, /* raster for current, prev char */ 7198: *expraster = (subraster *)NULL; /* raster returned to caller */ 7199: int delete_subraster(); /* free everything before returning*/ 7200: int family = fontinfo[fontnum].family; /* current font family */ 7201: int isleftscript = 0, /* true if left-hand term scripted */ 7202: wasscripted = 0, /* true if preceding token scripted*/ 7203: wasdelimscript = 0; /* true if preceding delim scripted*/ 7204: /*int pixsz = 1;*/ /*default #bits per pixel, 1=bitmap*/ 7205: char *strdetex(); /* detex token for error message */ 7206: /* --- global values saved/restored at each recursive iteration --- */ 7207: int wasstring = isstring, /* initial isstring mode flag */ 7208: wasdisplaystyle = isdisplaystyle, /*initial displaystyle mode flag*/ 7209: oldfontnum = fontnum, /* initial font family */ 7210: oldfontsize = fontsize, /* initial fontsize */ 7211: olddisplaysize = displaysize, /* initial \displaystyle size */ 7212: oldshrinkfactor = shrinkfactor, /* initial shrinkfactor */ 7213: oldsmashmargin = smashmargin, /* initial smashmargin */ 7214: oldissmashdelta = issmashdelta, /* initial issmashdelta */ 7215: oldisexplicitsmash = isexplicitsmash, /* initial isexplicitsmash */ 7216: oldisscripted = isscripted, /* initial isscripted */ 7217: *oldworkingparam = workingparam; /* initial working parameter */ 7218: subraster *oldworkingbox = workingbox, /* initial working box */ 7219: *oldleftexpression = leftexpression; /*left half rasterized so far*/ 7220: double oldunitlength = unitlength; /* initial unitlength */ 7221: mathchardef *oldleftsymdef = leftsymdef; /* init oldleftsymdef */ 7222: /* ------------------------------------------------------------------------- 7223: initialization 7224: -------------------------------------------------------------------------- */ 7225: recurlevel++; /* wind up one more recursion level*/ 7226: leftexpression = NULL; /* no leading left half yet */ 7227: isreplaceleft = 0; /* reset replaceleft flag */ 7228: if(1)fraccenterline = NOVALUE; /* reset \frac baseline signal */ 7229: /* shrinkfactor = shrinkfactors[max2(0,min2(size,LARGESTSIZE))];*/ /*set sf*/ 7230: shrinkfactor = shrinkfactors[max2(0,min2(size,16))]; /* have 17 sf's */ 7231: rastlift = 0; /* reset global rastraise() lift */ 7232: if ( msgfp!=NULL && msglevel >= 9 ) { /*display expression for debugging*/ 7233: fprintf(msgfp, 7234: "rasterize> recursion#%d, size=%d,\n\texpression=\"%s\"\n", 7235: recurlevel,size,(expression==NULL?"<null>":expression)); fflush(msgfp); } 7236: if ( expression == NULL ) goto end_of_job; /* nothing given to do */ 7237: /* ------------------------------------------------------------------------- 7238: preocess optional $-terminated preamble preceding expression 7239: -------------------------------------------------------------------------- */ 7240: expression = preamble(expression,&size,pretext); /* size may be modified */ 7241: if ( *expression == '\000' ) goto end_of_job; /* nothing left to do */ 7242: fontsize = size; /* start at requested size */ 7243: if ( isdisplaystyle == 1 ) /* displaystyle enabled but not set*/ 7244: if ( !ispreambledollars ) /* style fixed by $$...$$'s */ 7245: isdisplaystyle = (fontsize>=displaysize? 2:1); /*force at large fontsize*/ 7246: /* ------------------------------------------------------------------------- 7247: build up raster one character (or subexpression) at a time 7248: -------------------------------------------------------------------------- */ 7249: while ( 1 ) 7250: { 7251: /* --- kludge for \= cyrillic ligature --- */ 7252: isligature = 0; /* no ligature found yet */ 7253: family = fontinfo[fontnum].family; /* current font family */ 7254: if ( family == CYR10 ) /* may have cyrillic \= ligature */ 7255: if ( (ligdef = get_ligature(expression,family)) /*check for any ligature*/ 7256: >= 0 ) /* got some ligature */ 7257: if ( memcmp(symtable[ligdef].symbol,"\\=",2) == 0 ) /* starts with \= */ 7258: isligature = 1; /* signal \= ligature */ 7259: /* --- get next character/token or subexpression --- */ 7260: subexprptr = expression; /* ptr within expression to subexpr*/ 7261: expression = texsubexpr(expression,chartoken,0,LEFTBRACES,RIGHTBRACES,1,1); 7262: subexpr = chartoken; /* "local" copy of chartoken ptr */ 7263: leftsymdef = NULL; /* no character identified yet */ 7264: sp = NULL; /* no subraster yet */ 7265: size = fontsize; /* in case reset by \tiny, etc */ 7266: /*isleftscript = isdelimscript;*/ /*was preceding term scripted delim*/ 7267: wasscripted = isscripted; /* true if preceding token scripted*/ 7268: wasdelimscript = isdelimscript; /* preceding \right delim scripted */ 7269: if(1)isscripted = 0; /* no subscripted expression yet */ 7270: isdelimscript = 0; /* reset \right delim scripted flag*/ 7271: /* --- debugging output --- */ 7272: if ( msgfp!=NULL && msglevel >= 9 ) { /* display chartoken for debugging */ 7273: fprintf(msgfp, 7274: "rasterize> recursion#%d,atom#%d=\"%s\" (isligature=%d,isleftscript=%d)\n", 7275: recurlevel,natoms+1,chartoken,isligature,isleftscript); fflush(msgfp); } 7276: if ( expression == NULL /* no more tokens */ 7277: && *subexpr == '\000' ) break; /* and this token empty */ 7278: if ( *subexpr == '\000' ) break; /* enough if just this token empty */ 7279: /* --- check for parenthesized subexpression --- */ 7280: if ( isbrace(subexpr,LEFTBRACES,1) ) /* got parenthesized subexpression */ 7281: { if ( (sp=rastparen(&subexpr,size,prevsp)) /* rasterize subexpression */ 7282: == NULL ) continue; } /* flush it if failed to rasterize */ 7283: else /* --- single-character atomic token --- */ 7284: if ( !isthischar(*subexpr,SCRIPTS) ) /* scripts handled below */ 7285: { 7286: /* --- first check for opening $ in \text{ if $n-m$ even} --- */ 7287: if ( istextmode /* we're in \text mode */ 7288: && *subexpr=='$' && subexpr[1]=='\000' ) { /* and have an opening $ */ 7289: char *endptr=NULL, mathexpr[MAXSUBXSZ+1]; /* $expression$ in \text{ }*/ 7290: int exprlen = 0; /* length of $expression$ */ 7291: int textfontnum = fontnum; /* current text font number */ 7292: /*if ( (endptr=strrchr(expression,'$')) != NULL )*/ /*ptr to closing $*/ 7293: if ( (endptr=strchr(expression,'$')) != NULL ) /* ptr to closing $ */ 7294: exprlen = (int)(endptr-expression); /* #chars preceding closing $ */ 7295: else { /* no closing $ found */ 7296: exprlen = strlen(expression); /* just assume entire expression */ 7297: endptr = expression + (exprlen-1); } /*and push expression to '\000'*/ 7298: exprlen = min2(exprlen,MAXSUBXSZ); /* don't overflow mathexpr[] */ 7299: if ( exprlen > 0 ) { /* have something between $$ */ 7300: memcpy(mathexpr,expression,exprlen); /*local copy of math expression*/ 7301: mathexpr[exprlen] = '\000'; /* null-terminate it */ 7302: fontnum = 0; /* set math mode */ 7303: sp = rasterize(mathexpr,size); /* and rasterize $expression$ */ 7304: fontnum = textfontnum; } /* set back to text mode */ 7305: expression = endptr+1; /* push expression past closing $ */ 7306: } /* --- end-of-if(istextmode&&*subexpr=='$') --- */ 7307: else 7308: /* --- otherwise, look up mathchardef for atomic token in table --- */ 7309: if ( (leftsymdef=symdef=get_symdef(chartoken)) /*mathchardef for token*/ 7310: == NULL ) /* lookup failed */ 7311: { char literal[512] = "[?]"; /*display for unrecognized literal*/ 7312: int oldfontnum = fontnum; /* error display in default mode */ 7313: if ( msgfp!=NULL && msglevel >= 29 ) /* display unrecognized symbol*/ 7314: { fprintf(msgfp,"rasterize> get_symdef() failed for \"%s\"\n", 7315: chartoken); fflush(msgfp); } 7316: sp = (subraster *)NULL; /* init to signal failure */ 7317: if ( warninglevel < 1 ) continue; /* warnings not wanted */ 7318: fontnum = 0; /* reset from \mathbb, etc */ 7319: if ( isthischar(*chartoken,ESCAPE) ) /* we got unrecognized \escape*/ 7320: { /* --- so display literal {\rm~[\backslash~chartoken?]} --- */ 7321: strcpy(literal,"{\\rm~["); /* init error message token */ 7322: strcat(literal,strdetex(chartoken,0)); /* detex the token */ 7323: strcat(literal,"?]}"); } /* add closing ? and brace */ 7324: sp = rasterize(literal,size-1); /* rasterize literal token */ 7325: fontnum = oldfontnum; /* reset font family */ 7326: if ( sp == (subraster *)NULL ) continue; }/*flush if rasterize fails*/ 7327: else /* --- check if we have special handler to process this token --- */ 7328: if ( symdef->handler != NULL ) /* have a handler for this token */ 7329: { int arg1=symdef->charnum, arg2=symdef->family, arg3=symdef->class; 7330: if ( (sp = (subraster *) /* returned void* is subraster* */ 7331: (*(symdef->handler))(&expression,size,prevsp,arg1,arg2,arg3))==NULL) 7332: continue; } /* flush token if handler failed */ 7333: else /* --- no handler, so just get subraster for this character --- */ 7334: if ( !isstring ) /* rasterizing */ 7335: { if ( isligature ) /* found a ligature */ 7336: expression = subexprptr + strlen(symdef->symbol); /*push past it*/ 7337: if ( (sp=get_charsubraster(symdef,size)) /* get subraster */ 7338: == NULL ) continue; } /* flush token if failed */ 7339: else /* constructing ascii string */ 7340: { char *symbol = symdef->symbol; /* symbol for ascii string */ 7341: int symlen = (symbol!=NULL?strlen(symbol):0); /*#chars in symbol*/ 7342: if ( symlen < 1 ) continue; /* no symbol for ascii string */ 7343: if ( (sp=new_subraster(symlen+1,1,8)) /* subraster for symbol */ 7344: == NULL ) continue; /* flush token if malloc failed */ 7345: sp->type = ASCIISTRING; /* set subraster type */ 7346: sp->symdef = symdef; /* and set symbol definition */ 7347: sp->baseline = 1; /* default (should be unused) */ 7348: strcpy((char *)((sp->image)->pixmap),symbol); /* copy symbol */ 7349: /*((char *)((sp->image)->pixmap))[symlen] = '\000';*/ } /*null*/ 7350: } /* --- end-of-if(!isthischar(*subexpr,SCRIPTS)) --- */ 7351: /* --- handle any super/subscripts following symbol or subexpression --- */ 7352: sp = rastlimits(&expression,size,sp); 7353: isleftscript = (wasscripted||wasdelimscript?1:0);/*preceding term scripted*/ 7354: /* --- debugging output --- */ 7355: if ( msgfp!=NULL && msglevel >= 9 ) { /* display raster for debugging */ 7356: fprintf(msgfp,"rasterize> recursion#%d,atom#%d%s\n", 7357: recurlevel,natoms+1,(sp==NULL?" = <null>":"...")); 7358: if ( msglevel >= 9 ) fprintf(msgfp, 7359: " isleftscript=%d is/wasscripted=%d,%d is/wasdelimscript=%d,%d\n", 7360: isleftscript,isscripted,wasscripted,isdelimscript,wasdelimscript); 7361: if ( msglevel >= 99 ) 7362: if(sp!=NULL) type_raster(sp->image,msgfp); /* display raster */ 7363: fflush(msgfp); } /* flush msgfp buffer */ 7364: /* --- accumulate atom or parenthesized subexpression --- */ 7365: if ( natoms < 1 /* nothing previous to concat */ 7366: || expraster == NULL /* or previous was complete error */ 7367: || isreplaceleft ) /* or we're replacing previous */ 7368: { if ( 1 && expraster!=NULL ) /* probably replacing left */ 7369: delete_subraster(expraster); /* so first free original left */ 7370: expraster = subrastcpy(sp); /* copy static CHARASTER or left */ 7371: isreplaceleft = 0; } /* reset replacement flag */ 7372: else /*we've already built up atoms so...*/ 7373: if ( sp != NULL ) { /* ...if we have a new term */ 7374: int prevsmashmargin = smashmargin; /* save current smash margin */ 7375: if ( isleftscript ) { /* don't smash against scripts */ 7376: isdelimscript = 0; /* reset \right delim scripted flag*/ 7377: if ( !isexplicitsmash ) smashmargin = 0; } /* signal no smash wanted */ 7378: expraster = rastcat(expraster,sp,1); /* concat new term, free previous */ 7379: smashmargin = prevsmashmargin; } /* restore current smash margin */ 7380: delete_subraster(prevsp); /* free prev (if not a CHARASTER) */ 7381: prevsp = sp; /* current becomes previous */ 7382: leftexpression = expraster; /* left half rasterized so far */ 7383: /* --- bump count --- */ 7384: natoms++; /* bump #atoms count */ 7385: } /* --- end-of-while(expression!=NULL) --- */ 7386: /* ------------------------------------------------------------------------- 7387: back to caller with rasterized expression 7388: -------------------------------------------------------------------------- */ 7389: end_of_job: 7390: delete_subraster(prevsp); /* free last (if not a CHARASTER) */ 7391: /* --- debugging output --- */ 7392: if ( msgfp!=NULL && msglevel >= 999 ) /* display raster for debugging */ 7393: { fprintf(msgfp,"rasterize> Final recursion level=%d, atom#%d...\n", 7394: recurlevel,natoms); 7395: if ( expraster != (subraster *)NULL ) /* i.e., if natoms>0 */ 7396: type_raster(expraster->image,msgfp); /* display completed raster */ 7397: fflush(msgfp); } /* flush msgfp buffer */ 7398: /* --- set final raster buffer --- */ 7399: if ( 1 && expraster != (subraster *)NULL ) /* have an expression */ 7400: { int type = expraster->type; /* type of constructed image */ 7401: if ( type != FRACRASTER ) /* leave \frac alone */ 7402: expraster->type = IMAGERASTER; /* set type to constructed image */ 7403: if ( istextmode ) /* but in text mode */ 7404: expraster->type = blanksignal; /* set type to avoid smash */ 7405: expraster->size = fontsize; } /* set original input font size */ 7406: /* --- restore flags/values to original saved values --- */ 7407: isstring = wasstring; /* string mode reset */ 7408: isdisplaystyle = wasdisplaystyle; /* displaystyle mode reset */ 7409: fontnum = oldfontnum; /* font family reset */ 7410: fontsize = oldfontsize; /* fontsize reset */ 7411: displaysize = olddisplaysize; /* \displaystyle size reset */ 7412: shrinkfactor = oldshrinkfactor; /* shrinkfactor reset */ 7413: smashmargin = oldsmashmargin; /* smashmargin reset */ 7414: issmashdelta = oldissmashdelta; /* issmashdelta reset */ 7415: isexplicitsmash = oldisexplicitsmash; /* isexplicitsmash reset */ 7416: isscripted = oldisscripted; /* isscripted reset */ 7417: workingparam = oldworkingparam; /* working parameter reset */ 7418: workingbox = oldworkingbox; /* working box reset */ 7419: leftexpression = oldleftexpression; /* leftexpression reset */ 7420: leftsymdef = oldleftsymdef; /* leftsymdef reset */ 7421: unitlength = oldunitlength; /* unitlength reset */ 7422: iunitlength = (int)(unitlength+0.5); /* iunitlength reset */ 7423: recurlevel--; /* unwind one recursion level */ 7424: /* --- return final subraster to caller --- */ 7425: return ( expraster ); 7426: } /* --- end-of-function rasterize() --- */ 7427: 7428: 7429: /* ========================================================================== 7430: * Function: rastparen ( subexpr, size, basesp ) 7431: * Purpose: parentheses handler, returns a subraster corresponding to 7432: * parenthesized subexpression at font size 7433: * -------------------------------------------------------------------------- 7434: * Arguments: subexpr (I) char ** to first char of null-terminated 7435: * string beginning with a LEFTBRACES 7436: * to be rasterized 7437: * size (I) int containing 0-7 default font size 7438: * basesp (I) subraster * to character (or subexpression) 7439: * immediately preceding leading left{ 7440: * (unused, but passed for consistency) 7441: * -------------------------------------------------------------------------- 7442: * Returns: ( subraster * ) ptr to subraster corresponding to subexpr, 7443: * or NULL for any parsing error 7444: * -------------------------------------------------------------------------- 7445: * Notes: o This "handler" isn't in the mathchardef symbol table, 7446: * but is called directly from rasterize(), as necessary. 7447: * o Though subexpr is returned unchanged, it's passed as char ** 7448: * for consistency with other handlers. Ditto, basesp is unused 7449: * but passed for consistency 7450: * ======================================================================= */ 7451: /* --- entry point --- */ 7452: subraster *rastparen ( char **subexpr, int size, subraster *basesp ) 7453: { 7454: /* ------------------------------------------------------------------------- 7455: Allocations and Declarations 7456: -------------------------------------------------------------------------- */ 7457: char *expression = *subexpr; /* dereference subexpr to get char* */ 7458: int explen = strlen(expression); /* total #chars, including parens */ 7459: int isescape = 0, /* true if parens \escaped */ 7460: isrightdot = 0, /* true if right paren is \right. */ 7461: isleftdot = 0; /* true if left paren is \left. */ 7462: char left[32], right[32]; /* parens enclosing expresion */ 7463: char noparens[MAXSUBXSZ+1]; /* get subexpr without parens */ 7464: subraster *rasterize(), *sp=NULL; /* rasterize what's between ()'s */ 7465: int isheight = 1; /*true=full height, false=baseline*/ 7466: int height, /* height of rasterized noparens[] */ 7467: baseline; /* and its baseline */ 7468: int family = /*CMSYEX*/ CMEX10; /* family for paren chars */ 7469: subraster *get_delim(), *lp=NULL, *rp=NULL; /* left and right paren chars */ 7470: subraster *rastcat(); /* concatanate subrasters */ 7471: int delete_subraster(); /*in case of error after allocation*/ 7472: /* ------------------------------------------------------------------------- 7473: rasterize "interior" of expression, i.e., without enclosing parens 7474: -------------------------------------------------------------------------- */ 7475: /* --- first see if enclosing parens are \escaped --- */ 7476: if ( isthischar(*expression,ESCAPE) ) /* expression begins with \escape */ 7477: isescape = 1; /* so set flag accordingly */ 7478: /* --- get expression *without* enclosing parens --- */ 7479: strcpy(noparens,expression); /* get local copy of expression */ 7480: noparens[explen-(1+isescape)] = '\000'; /* null-terminate before right} */ 7481: strsqueeze(noparens,(1+isescape)); /* and then squeeze out left{ */ 7482: /* --- rasterize it --- */ 7483: if ( (sp = rasterize(noparens,size)) /*rasterize "interior" of expression*/ 7484: == NULL ) goto end_of_job; /* quit if failed */ 7485: /* --- no need to add parentheses for unescaped { --- */ 7486: if ( !isescape && isthischar(*expression,"{") ) /* don't add parentheses */ 7487: goto end_of_job; /* just return sp to caller */ 7488: /* ------------------------------------------------------------------------- 7489: obtain paren characters to enclose noparens[] raster with 7490: -------------------------------------------------------------------------- */ 7491: /* --- first get left and right parens from expression --- */ 7492: memset(left,0,16); memset(right,0,16); /* init parens with nulls */ 7493: left[0] = *(expression+isescape); /* left{ is 1st or 2nd char */ 7494: right[0] = *(expression+explen-1); /* right} is always last char */ 7495: isleftdot = (isescape && isthischar(*left,".")); /* true if \left. */ 7496: isrightdot = (isescape && isthischar(*right,".")); /* true if \right. */ 7497: /* --- need height of noparens[] raster as minimum parens height --- */ 7498: height = (sp->image)->height; /* height of noparens[] raster */ 7499: baseline = sp->baseline; /* baseline of noparens[] raster */ 7500: if ( !isheight ) height = baseline+1; /* parens only enclose baseline up */ 7501: /* --- get best-fit parentheses characters --- */ 7502: if ( !isleftdot ) /* if not \left. */ 7503: lp = get_delim(left,height+1,family); /* get left paren char */ 7504: if ( !isrightdot ) /* and if not \right. */ 7505: rp = get_delim(right,height+1,family); /* get right paren char */ 7506: if ( (lp==NULL && !isleftdot) /* check that we got left( */ 7507: || (rp==NULL && !isrightdot) ) /* and right) if needed */ 7508: { delete_subraster(sp); /* if failed, free subraster */ 7509: if ( lp != NULL ) free ((void *)lp);/*free left-paren subraster envelope*/ 7510: if ( rp != NULL ) free ((void *)rp);/*and right-paren subraster envelope*/ 7511: sp = (subraster *)NULL; /* signal error to caller */ 7512: goto end_of_job; } /* and quit */ 7513: /* ------------------------------------------------------------------------- 7514: set paren baselines to center on noparens[] raster, and concat components 7515: -------------------------------------------------------------------------- */ 7516: /* --- set baselines to center paren chars on raster --- */ 7517: if ( lp != NULL ) /* ignore for \left. */ 7518: lp->baseline = baseline + ((lp->image)->height - height)/2; 7519: if ( rp != NULL ) /* ignore for \right. */ 7520: rp->baseline = baseline + ((rp->image)->height - height)/2; 7521: /* --- concat lp||sp||rp to obtain final result --- */ 7522: if ( lp != NULL ) /* ignore \left. */ 7523: sp = rastcat(lp,sp,3); /* concat lp||sp and free sp,lp */ 7524: if ( sp != NULL ) /* succeeded or ignored \left. */ 7525: if ( rp != NULL ) /* ignore \right. */ 7526: sp = rastcat(sp,rp,3); /* concat sp||rp and free sp,rp */ 7527: /* --- back to caller --- */ 7528: end_of_job: 7529: return ( sp ); 7530: } /* --- end-of-function rastparen() --- */ 7531: 7532: 7533: /* ========================================================================== 7534: * Function: rastlimits ( expression, size, basesp ) 7535: * Purpose: \limits, \nolimts, _ and ^ handler, 7536: * dispatches call to rastscripts() or to rastdispmath() 7537: * as necessary, to handle sub/superscripts following symbol 7538: * -------------------------------------------------------------------------- 7539: * Arguments: expression (I) char ** to first char of null-terminated 7540: * LaTeX expression (unused/unchanged) 7541: * size (I) int containing base font size (not used, 7542: * just stored in subraster) 7543: * basesp (I) subraster * to current character (or 7544: * subexpression) immediately preceding script 7545: * indicator 7546: * -------------------------------------------------------------------------- 7547: * Returns: ( subraster * ) ptr to subraster returned by rastscripts() 7548: * or rastdispmath(), or NULL for any error 7549: * -------------------------------------------------------------------------- 7550: * Notes: o 7551: * ======================================================================= */ 7552: /* --- entry point --- */ 7553: subraster *rastlimits ( char **expression, int size, subraster *basesp ) 7554: { 7555: /* ------------------------------------------------------------------------- 7556: Allocations and Declarations 7557: -------------------------------------------------------------------------- */ 7558: subraster *rastscripts(), *rastdispmath(), /*one of these will do the work*/ 7559: *rastcat(), /* may need to concat scripts */ 7560: *rasterize(), /* may need to construct dummy base*/ 7561: *scriptsp = basesp, /* and this will become the result */ 7562: *dummybase = basesp; /* for {}_i construct a dummy base */ 7563: int isdisplay = (-1); /* set 1 for displaystyle, else 0 */ 7564: int oldsmashmargin = smashmargin; /* save original smashmargin */ 7565: int type_raster(); /* display debugging output */ 7566: int delete_subraster(); /* free dummybase, if necessary */ 7567: int rastsmashcheck(); /* check if okay to smash scripts */ 7568: /* --- to check for \limits or \nolimits preceding scripts --- */ 7569: char *texchar(), *exprptr=*expression, limtoken[255]; /*check for \limits*/ 7570: int toklen=0; /* strlen(limtoken) */ 7571: mathchardef *tokdef, *get_symdef(); /* mathchardef struct for limtoken */ 7572: int class=(leftsymdef==NULL?NOVALUE:leftsymdef->class); /*base sym class*/ 7573: /* ------------------------------------------------------------------------- 7574: determine whether or not to use displaymath 7575: -------------------------------------------------------------------------- */ 7576: scriptlevel++; /* first, increment subscript level*/ 7577: *limtoken = '\000'; /* no token yet */ 7578: isscripted = 0; /* signal term not (text) scripted */ 7579: if ( msgfp!=NULL && msglevel>=999 ) 7580: { fprintf(msgfp,"rastlimits> scriptlevel#%d exprptr=%.48s\n", 7581: scriptlevel,(exprptr==NULL?"null":exprptr)); fflush(msgfp); } 7582: if ( isstring ) goto end_of_job; /* no scripts for ascii string */ 7583: /* --- check for \limits or \nolimits --- */ 7584: skipwhite(exprptr); /* skip white space before \limits */ 7585: if ( !isempty(exprptr) ) /* non-empty expression supplied */ 7586: exprptr = texchar(exprptr,limtoken); /* retrieve next token */ 7587: if ( *limtoken != '\000' ) /* have token */ 7588: if ( (toklen=strlen(limtoken)) >= 3 ) /* which may be \[no]limits */ 7589: if ( memcmp("\\limits",limtoken,toklen) == 0 /* may be \limits */ 7590: || memcmp("\\nolimits",limtoken,toklen) == 0 ) /* or may be \nolimits */ 7591: if ( (tokdef= get_symdef(limtoken)) /* look up token to be sure */ 7592: != NULL ) { /* found token in table */ 7593: if ( strcmp("\\limits",tokdef->symbol) == 0 ) /* found \limits */ 7594: isdisplay = 1; /* so explicitly set displaymath */ 7595: else /* wasn't \limits */ 7596: if ( strcmp("\\nolimits",tokdef->symbol) == 0 ) /* found \nolimits */ 7597: isdisplay = 0; } /* so explicitly reset displaymath */ 7598: /* --- see if we found \[no]limits --- */ 7599: if ( isdisplay != (-1) ) /* explicit directive found */ 7600: *expression = exprptr; /* so bump expression past it */ 7601: else /* noexplicit directive */ 7602: { isdisplay = 0; /* init displaymath flag off */ 7603: if ( isdisplaystyle ) { /* we're in displaystyle math mode */ 7604: if ( isdisplaystyle >= 5 ) /* and mode irrevocably forced true */ 7605: { if ( class!=OPENING && class!=CLOSING ) /*don't force ('s and )'s*/ 7606: isdisplay = 1; } /* set flag if mode forced true */ 7607: else 7608: if ( isdisplaystyle >= 2 ) /*or mode forced conditionally true*/ 7609: { if ( class!=VARIABLE && class!=ORDINARY /*don't force characters*/ 7610: && class!=OPENING && class!=CLOSING /*don't force ('s and )'s*/ 7611: && class!=BINARYOP /* don't force binary operators */ 7612: && class!=NOVALUE ) /* finally, don't force "images" */ 7613: isdisplay = 1; } /* set flag if mode forced true */ 7614: else /* determine mode from base symbol */ 7615: if ( class == DISPOPER ) /* it's a displaystyle operator */ 7616: isdisplay = 1; } } /* so set flag */ 7617: /* ------------------------------------------------------------------------- 7618: dispatch call to create sub/superscripts 7619: -------------------------------------------------------------------------- */ 7620: if ( isdisplay ) /* scripts above/below base symbol */ 7621: scriptsp = rastdispmath(expression,size,basesp); /* everything all done */ 7622: else { /* scripts alongside base symbol */ 7623: if ( dummybase == NULL ) /* no base symbol preceding scripts*/ 7624: dummybase = rasterize("\\rule0{10}",size); /*guess a typical base symbol*/ 7625: issmashokay = 1; /*haven't found a no-smash char yet*/ 7626: if((scriptsp=rastscripts(expression,size,dummybase)) == NULL) /*no scripts*/ 7627: scriptsp = basesp; /* so just return unscripted symbol*/ 7628: else { /* symbols followed by scripts */ 7629: isscripted = 1; /*signal current term text-scripted*/ 7630: if ( basesp != NULL ) /* have base symbol */ 7631: { /*if(0)smashmargin = 0;*/ /*don't smash script (doesn't work)*/ 7632: /*scriptsp = rastcat(basesp,scriptsp,2);*//*concat scripts to base sym*/ 7633: /* --- smash (or just concat) script raster against base symbol --- */ 7634: if ( !issmashokay ) /* don't smash leading - */ 7635: if ( !isexplicitsmash ) scriptsp->type = blanksignal; /*don't smash*/ 7636: scriptsp = rastcat(basesp,scriptsp,3); /*concat scripts to base sym*/ 7637: if(1) scriptsp->type = IMAGERASTER; /* flip type of composite object */ 7638: /* --- smash (or just concat) scripted term to stuff to its left --- */ 7639: issmashokay = 1; /* okay to smash base expression */ 7640: if ( 0 && smashcheck > 1 ) /* smashcheck=2 to check base */ 7641: /* note -- we _don't_ have base expression available to check */ 7642: issmashokay = rastsmashcheck(*expression); /*check if okay to smash*/ 7643: if ( !issmashokay ) /* don't smash leading - */ 7644: if ( !isexplicitsmash ) scriptsp->type = blanksignal; /*don't smash*/ 7645: scriptsp->size = size; } } } /* and set font size */ 7646: end_of_job: 7647: smashmargin = oldsmashmargin; /* reset original smashmargin */ 7648: if ( dummybase != basesp ) delete_subraster(dummybase); /*free work area*/ 7649: if ( msgfp!=NULL && msglevel>=99 ) 7650: { fprintf(msgfp,"rastlimits> scriptlevel#%d returning %s\n", 7651: scriptlevel,(scriptsp==NULL?"null":"...")); 7652: if ( scriptsp != NULL ) /* have a constructed raster */ 7653: type_raster(scriptsp->image,msgfp); /*display constructed raster*/ 7654: fflush(msgfp); } 7655: scriptlevel--; /*lastly, decrement subscript level*/ 7656: return ( scriptsp ); 7657: } /* --- end-of-function rastlimits() --- */ 7658: 7659: 7660: /* ========================================================================== 7661: * Function: rastscripts ( expression, size, basesp ) 7662: * Purpose: super/subscript handler, returns subraster for the leading 7663: * scripts in expression, whose base symbol is at font size 7664: * -------------------------------------------------------------------------- 7665: * Arguments: expression (I/O) char ** to first char of null-terminated 7666: * string beginning with a super/subscript, 7667: * and returning ptr immediately following 7668: * last script character processed. 7669: * size (I) int containing 0-7 default font size 7670: * basesp (I) subraster * to character (or subexpression) 7671: * immediately preceding leading script 7672: * (scripts will be placed relative to base) 7673: * -------------------------------------------------------------------------- 7674: * Returns: ( subraster * ) ptr to subraster corresponding to scripts, 7675: * or NULL for any parsing error 7676: * -------------------------------------------------------------------------- 7677: * Notes: o This "handler" isn't in the mathchardef symbol table, 7678: * but is called directly from rasterize(), as necessary. 7679: * ======================================================================= */ 7680: /* --- entry point --- */ 7681: subraster *rastscripts ( char **expression, int size, subraster *basesp ) 7682: { 7683: /* ------------------------------------------------------------------------- 7684: Allocations and Declarations 7685: -------------------------------------------------------------------------- */ 7686: char *texscripts(), /* parse expression for scripts */ 7687: subscript[512], supscript[512]; /* scripts parsed from expression */ 7688: subraster *rasterize(), *subsp=NULL, *supsp=NULL; /* rasterize scripts */ 7689: subraster *new_subraster(), *sp=NULL, /* super- over subscript subraster */ 7690: *rastack(); /*sets scripts in displaymath mode*/ 7691: raster *rp=NULL; /* image raster embedded in sp */ 7692: int height=0, width=0, baseline=0, /* height,width,baseline of sp */ 7693: subht=0, subwidth=0, subln=0, /* height,width,baseline of sub */ 7694: supht=0, supwidth=0, supln=0, /* height,width,baseline of sup */ 7695: baseht=0, baseln=0; /* height,baseline of base */ 7696: int bdescend=0, sdescend=0; /* descender of base, subscript */ 7697: int issub=0, issup=0, isboth=0, /* true if we have sub,sup,both */ 7698: isbase=0; /* true if we have base symbol */ 7699: int szval = min2(max2(size,0),LARGESTSIZE), /* 0...LARGESTSIZE */ 7700: vbetween = 2, /* vertical space between scripts */ 7701: vabove = szval+1, /*sup's top/bot above base's top/bot*/ 7702: vbelow = szval+1, /*sub's top/bot below base's top/bot*/ 7703: vbottom = szval+1; /*sup's bot above (sub's below) bsln*/ 7704: /*int istweak = 1;*/ /* true to tweak script positioning */ 7705: int rastput(); /*put scripts in constructed raster*/ 7706: int delete_subraster(); /* free work areas */ 7707: int rastsmashcheck(); /* check if okay to smash scripts */ 7708: int pixsz = 1; /*default #bits per pixel, 1=bitmap*/ 7709: /* ------------------------------------------------------------------------- 7710: Obtain subscript and/or superscript expressions, and rasterize them/it 7711: -------------------------------------------------------------------------- */ 7712: /* --- parse for sub,superscript(s), and bump expression past it(them) --- */ 7713: if ( expression == NULL ) goto end_of_job; /* no *ptr given */ 7714: if ( *expression == NULL ) goto end_of_job; /* no expression given */ 7715: if ( *(*expression) == '\000' ) goto end_of_job; /* nothing in expression */ 7716: *expression = texscripts(*expression,subscript,supscript,3); 7717: /* --- rasterize scripts --- */ 7718: if ( *subscript != '\000' ) /* have a subscript */ 7719: subsp = rasterize(subscript,size-1); /* so rasterize it at size-1 */ 7720: if ( *supscript != '\000' ) /* have a superscript */ 7721: supsp = rasterize(supscript,size-1); /* so rasterize it at size-1 */ 7722: /* --- set flags for convenience --- */ 7723: issub = (subsp != (subraster *)NULL); /* true if we have subscript */ 7724: issup = (supsp != (subraster *)NULL); /* true if we have superscript */ 7725: isboth = (issub && issup); /* true if we have both */ 7726: if (!issub && !issup) goto end_of_job; /* quit if we have neither */ 7727: /* --- check for leading no-smash chars (if enabled) --- */ 7728: issmashokay = 0; /* default, don't smash scripts */ 7729: if ( smashcheck > 0 ) { /* smash checking wanted */ 7730: issmashokay = 1; /*haven't found a no-smash char yet*/ 7731: if ( issub ) /* got a subscript */ 7732: issmashokay = rastsmashcheck(subscript); /* check if okay to smash */ 7733: if ( issmashokay ) /* clean sub, so check sup */ 7734: if ( issup ) /* got a superscript */ 7735: issmashokay = rastsmashcheck(supscript); /* check if okay to smash */ 7736: } /* --- end-of-if(smashcheck>0) --- */ 7737: /* ------------------------------------------------------------------------- 7738: get height, width, baseline of scripts, and height, baseline of base symbol 7739: -------------------------------------------------------------------------- */ 7740: /* --- get height and width of components --- */ 7741: if ( issub ) /* we have a subscript */ 7742: { subht = (subsp->image)->height; /* so get its height */ 7743: subwidth = (subsp->image)->width; /* and width */ 7744: subln = subsp->baseline; } /* and baseline */ 7745: if ( issup ) /* we have a superscript */ 7746: { supht = (supsp->image)->height; /* so get its height */ 7747: supwidth = (supsp->image)->width; /* and width */ 7748: supln = supsp->baseline; } /* and baseline */ 7749: /* --- get height and baseline of base, and descender of base and sub --- */ 7750: if ( basesp == (subraster *)NULL ) /* no base symbol for scripts */ 7751: basesp = leftexpression; /* try using left side thus far */ 7752: if ( basesp != (subraster *)NULL ) /* we have base symbol for scripts */ 7753: { baseht = (basesp->image)->height; /* height of base symbol */ 7754: baseln = basesp->baseline; /* and its baseline */ 7755: bdescend = baseht-(baseln+1); /* and base symbol descender */ 7756: sdescend = bdescend + vbelow; /*sub must descend by at least this*/ 7757: if ( baseht > 0 ) isbase = 1; } /* set flag */ 7758: /* ------------------------------------------------------------------------- 7759: determine width of constructed raster 7760: -------------------------------------------------------------------------- */ 7761: width = max2(subwidth,supwidth); /*widest component is overall width*/ 7762: /* ------------------------------------------------------------------------- 7763: determine height and baseline of constructed raster 7764: -------------------------------------------------------------------------- */ 7765: /* --- both super/subscript --- */ 7766: if ( isboth ) /*we have subscript and superscript*/ 7767: { height = max2(subht+vbetween+supht, /* script heights + space bewteen */ 7768: vbelow+baseht+vabove); /*sub below base bot, sup above top*/ 7769: baseline = baseln + (height-baseht)/2; } /*center scripts on base symbol*/ 7770: /* --- superscript only --- */ 7771: if ( !issub ) /* we only have a superscript */ 7772: { height = max3(baseln+1+vabove, /* sup's top above base symbol top */ 7773: supht+vbottom, /* sup's bot above baseln */ 7774: supht+vabove-bdescend); /* sup's bot above base symbol bot */ 7775: baseline = height-1; } /*sup's baseline at bottom of raster*/ 7776: /* --- subscript only --- */ 7777: if ( !issup ) { /* we only have a subscript */ 7778: if ( subht > sdescend ) /*sub can descend below base bot...*/ 7779: { height = subht; /* ...without extra space on top */ 7780: baseline = height-(sdescend+1); /* sub's bot below base symbol bot */ 7781: baseline = min2(baseline,max2(baseln-vbelow,0)); }/*top below base top*/ 7782: else /* sub's top will be below baseln */ 7783: { height = sdescend+1; /* sub's bot below base symbol bot */ 7784: baseline = 0; } } /* sub's baseline at top of raster */ 7785: /* ------------------------------------------------------------------------- 7786: construct raster with superscript over subscript 7787: -------------------------------------------------------------------------- */ 7788: /* --- allocate subraster containing constructed raster --- */ 7789: if ( (sp=new_subraster(width,height,pixsz)) /*allocate subraster and raster*/ 7790: == NULL ) /* and if we fail to allocate */ 7791: goto end_of_job; /* quit */ 7792: /* --- initialize subraster parameters --- */ 7793: sp->type = IMAGERASTER; /* set type as constructed image */ 7794: sp->size = size; /* set given size */ 7795: sp->baseline = baseline; /* composite scripts baseline */ 7796: rp = sp->image; /* raster embedded in subraster */ 7797: /* --- place super/subscripts in new raster --- */ 7798: if ( issup ) /* we have a superscript */ 7799: rastput(rp,supsp->image,0,0,1); /* it goes in upper-left corner */ 7800: if ( issub ) /* we have a subscript */ 7801: rastput(rp,subsp->image,height-subht,0,1); /*in lower-left corner*/ 7802: /* ------------------------------------------------------------------------- 7803: free unneeded component subrasters and return final result to caller 7804: -------------------------------------------------------------------------- */ 7805: end_of_job: 7806: if ( issub ) delete_subraster(subsp); /* free unneeded subscript */ 7807: if ( issup ) delete_subraster(supsp); /* and superscript */ 7808: return ( sp ); 7809: } /* --- end-of-function rastscripts() --- */ 7810: 7811: 7812: /* ========================================================================== 7813: * Function: rastdispmath ( expression, size, sp ) 7814: * Purpose: displaymath handler, returns sp along with 7815: * its immediately following super/subscripts 7816: * -------------------------------------------------------------------------- 7817: * Arguments: expression (I/O) char ** to first char of null-terminated 7818: * string immediately following sp to be 7819: * rasterized along with its super/subscripts, 7820: * and returning ptr immediately following last 7821: * character processed. 7822: * size (I) int containing 0-7 default font size 7823: * sp (I) subraster * to display math operator 7824: * to which super/subscripts will be added 7825: * -------------------------------------------------------------------------- 7826: * Returns: ( subraster * ) ptr to subraster corresponding to sp 7827: * plus its scripts, or NULL for any error 7828: * -------------------------------------------------------------------------- 7829: * Notes: o sp returned unchanged if no super/subscript(s) follow it. 7830: * ======================================================================= */ 7831: /* --- entry point --- */ 7832: subraster *rastdispmath ( char **expression, int size, subraster *sp ) 7833: { 7834: /* ------------------------------------------------------------------------- 7835: Allocations and Declarations 7836: -------------------------------------------------------------------------- */ 7837: char *texscripts(), /* parse expression for scripts */ 7838: subscript[512], supscript[512]; /* scripts parsed from expression */ 7839: int issub=0, issup=0; /* true if we have sub,sup */ 7840: subraster *rasterize(), *subsp=NULL, *supsp=NULL, /* rasterize scripts */ 7841: *rastack(), /* stack operator with scripts */ 7842: *new_subraster(); /* for dummy base sp, if needed */ 7843: int vspace = 1; /* vertical space between scripts */ 7844: /* ------------------------------------------------------------------------- 7845: Obtain subscript and/or superscript expressions, and rasterize them/it 7846: -------------------------------------------------------------------------- */ 7847: /* --- parse for sub,superscript(s), and bump expression past it(them) --- */ 7848: if ( expression == NULL ) goto end_of_job; /* no *ptr given */ 7849: if ( *expression == NULL ) goto end_of_job; /* no expression given */ 7850: if ( *(*expression) == '\000' ) goto end_of_job; /* nothing in expression */ 7851: *expression = texscripts(*expression,subscript,supscript,3); 7852: /* --- rasterize scripts --- */ 7853: if ( *subscript != '\000' ) /* have a subscript */ 7854: subsp = rasterize(subscript,size-1); /* so rasterize it at size-1 */ 7855: if ( *supscript != '\000' ) /* have a superscript */ 7856: supsp = rasterize(supscript,size-1); /* so rasterize it at size-1 */ 7857: /* --- set flags for convenience --- */ 7858: issub = (subsp != (subraster *)NULL); /* true if we have subscript */ 7859: issup = (supsp != (subraster *)NULL); /* true if we have superscript */ 7860: if (!issub && !issup) goto end_of_job; /*return operator alone if neither*/ 7861: /* ------------------------------------------------------------------------- 7862: stack operator and its script(s) 7863: -------------------------------------------------------------------------- */ 7864: /* --- stack superscript atop operator --- */ 7865: if ( issup ) { /* we have a superscript */ 7866: if ( sp == NULL ) /* but no base expression */ 7867: sp = supsp; /* so just use superscript */ 7868: else /* have base and superscript */ 7869: if ( (sp=rastack(sp,supsp,1,vspace,1,3)) /* stack supsp atop base sp */ 7870: == NULL ) goto end_of_job; } /* and quit if failed */ 7871: /* --- stack operator+superscript atop subscript --- */ 7872: if ( issub ) { /* we have a subscript */ 7873: if ( sp == NULL ) /* but no base expression */ 7874: sp = subsp; /* so just use subscript */ 7875: else /* have base and subscript */ 7876: if ( (sp=rastack(subsp,sp,2,vspace,1,3)) /* stack sp atop base subsp */ 7877: == NULL ) goto end_of_job; } /* and quit if failed */ 7878: sp->type = IMAGERASTER; /* flip type of composite object */ 7879: sp->size = size; /* and set font size */ 7880: /* ------------------------------------------------------------------------- 7881: free unneeded component subrasters and return final result to caller 7882: -------------------------------------------------------------------------- */ 7883: end_of_job: 7884: return ( sp ); 7885: } /* --- end-of-function rastdispmath() --- */ 7886: 7887: 7888: /* ========================================================================== 7889: * Function: rastleft ( expression, size, basesp, ildelim, arg2, arg3 ) 7890: * Purpose: \left...\right handler, returns a subraster corresponding to 7891: * delimited subexpression at font size 7892: * -------------------------------------------------------------------------- 7893: * Arguments: expression (I) char ** to first char of null-terminated 7894: * string beginning with a \left 7895: * to be rasterized 7896: * size (I) int containing 0-7 default font size 7897: * basesp (I) subraster * to character (or subexpression) 7898: * immediately preceding leading left{ 7899: * (unused, but passed for consistency) 7900: * ildelim (I) int containing ldelims[] index of 7901: * left delimiter 7902: * arg2 (I) int unused 7903: * arg3 (I) int unused 7904: * -------------------------------------------------------------------------- 7905: * Returns: ( subraster * ) ptr to subraster corresponding to subexpr, 7906: * or NULL for any parsing error 7907: * -------------------------------------------------------------------------- 7908: * Notes: o 7909: * ======================================================================= */ 7910: /* --- entry point --- */ 7911: subraster *rastleft ( char **expression, int size, subraster *basesp, 7912: int ildelim, int arg2, int arg3 ) 7913: { 7914: /* ------------------------------------------------------------------------- 7915: Allocations and Declarations 7916: -------------------------------------------------------------------------- */ 7917: subraster *rasterize(), *sp=NULL; /*rasterize between \left...\right*/ 7918: subraster *get_delim(), *lp=NULL, *rp=NULL; /* left and right delim chars */ 7919: subraster *rastlimits(); /*handle sub/super scripts on lp,rp*/ 7920: subraster *rastcat(); /* concat lp||sp||rp subrasters */ 7921: int family=CMSYEX, /* get_delim() family */ 7922: height=0, rheight=0, /* subexpr, right delim height */ 7923: margin=(size+1), /* delim height margin over subexpr*/ 7924: opmargin=(5); /* extra margin for \int,\sum,\etc */ 7925: char /* *texleft(),*/ subexpr[MAXSUBXSZ+1];/*chars between \left...\right*/ 7926: char *texchar(), /* get delims after \left,\right */ 7927: ldelim[256]=".", rdelim[256]="."; /* delims following \left,\right */ 7928: char *strtexchr(), *pleft, *pright; /*locate \right matching our \left*/ 7929: int isleftdot=0, isrightdot=0; /* true if \left. or \right. */ 7930: int isleftscript=0, isrightscript=0; /* true if delims are scripted */ 7931: int sublen=0; /* strlen(subexpr) */ 7932: int idelim=0; /* 1=left,2=right */ 7933: /* int gotldelim = 0; */ /* true if ildelim given by caller */ 7934: int delete_subraster(); /* free subraster if rastleft fails*/ 7935: int wasdisplaystyle = isdisplaystyle; /* save current displaystyle */ 7936: int istextleft=0, istextright=0; /* true for non-displaystyle delims*/ 7937: /* --- recognized delimiters --- */ 7938: static char left[16]="\\left", right[16]="\\right"; /* tex delimiters */ 7939: static char *ldelims[] = { 7940: "unused", ".", /* 1 for \left., \right. */ 7941: "(", ")", /* 2,3 for \left(, \right) */ 7942: "\\{","\\}", /* 4,5 for \left\{, \right\} */ 7943: "[", "]", /* 6,7 for \left[, \right] */ 7944: "<", ">", /* 8,9 for \left<, \right> */ 7945: "|", "\\|", /* 10,11 for \left,\right |,\|*/ 7946: NULL }; 7947: /* --- recognized operator delimiters --- */ 7948: static char *opdelims[] = { /* operator delims from cmex10 */ 7949: "int", "sum", "prod", 7950: "cup", "cap", "dot", 7951: "plus", "times", "wedge", 7952: "vee", 7953: NULL }; /* --- end-of-opdelims[] --- */ 7954: /* --- delimiter xlation --- */ 7955: static char *xfrom[] = /* xlate any delim suffix... */ 7956: { "\\|", /* \| */ 7957: "\\{", /* \{ */ 7958: "\\}", /* \} */ 7959: "\\lbrace", /* \lbrace */ 7960: "\\rbrace", /* \rbrace */ 7961: "\\langle", /* \langle */ 7962: "\\rangle", /* \rangle */ 7963: NULL } ; /* --- end-of-xfrom[] --- */ 7964: static char *xto[] = /* ...to this instead */ 7965: { "=", /* \| to = */ 7966: "{", /* \{ to { */ 7967: "}", /* \} to } */ 7968: "{", /* \lbrace to { */ 7969: "}", /* \rbrace to } */ 7970: "<", /* \langle to < */ 7971: ">", /* \rangle to > */ 7972: NULL } ; /* --- end-of-xto[] --- */ 7973: /* --- non-displaystyle delimiters --- */ 7974: static char *textdelims[] = /* these delims _aren't_ display */ 7975: { "|", "=", 7976: "(", ")", 7977: "[", "]", 7978: "<", ">", 7979: "{", "}", 7980: "dbl", /* \lbrackdbl and \rbrackdbl */ 7981: NULL } ; /* --- end-of-textdelims[] --- */ 7982: /* ------------------------------------------------------------------------- 7983: initialization 7984: -------------------------------------------------------------------------- */ 7985: /* --- check args --- */ 7986: if ( *(*expression) == '\000' ) goto end_of_job; /* nothing after \left */ 7987: /* --- determine left delimiter, and set default \right. delimiter --- */ 7988: if ( ildelim!=NOVALUE && ildelim>=1 ) /* called with explicit left delim */ 7989: { strcpy(ldelim,ldelims[ildelim]); /* so just get a local copy */ 7990: /* gotldelim = 1; */ } /* and set flag that we got it */ 7991: else /* trapped \left without delim */ 7992: { skipwhite(*expression); /* interpret \left ( as \left( */ 7993: if ( *(*expression) == '\000' ) /* end-of-string after \left */ 7994: goto end_of_job; /* so return NULL */ 7995: *expression = texchar(*expression,ldelim); /*pull delim from expression*/ 7996: if ( *expression == NULL /* probably invalid end-of-string */ 7997: || *ldelim == '\000' ) goto end_of_job; } /* no delimiter */ 7998: strcpy(rdelim,"."); /* init default \right. delim */ 7999: /* ------------------------------------------------------------------------- 8000: locate \right balancing our opening \left 8001: -------------------------------------------------------------------------- */ 8002: /* --- first \right following \left --- */ 8003: if ( (pright=strtexchr(*expression,right)) /* look for \right after \left */ 8004: != NULL ) { /* found it */ 8005: /* --- find matching \right by pushing past any nested \left's --- */ 8006: pleft = *expression; /* start after first \left( */ 8007: while ( 1 ) { /*break when matching \right found*/ 8008: /* -- locate next nested \left if there is one --- */ 8009: if ( (pleft=strtexchr(pleft,left)) /* find next \left */ 8010: == NULL ) break; /*no more, so matching \right found*/ 8011: pleft += strlen(left); /* push ptr past \left token */ 8012: if ( pleft >= pright ) break; /* not nested if \left after \right*/ 8013: /* --- have nested \left, so push forward to next \right --- */ 8014: if ( (pright=strtexchr(pright+strlen(right),right)) /* find next \right */ 8015: == NULL ) break; /* ran out of \right's */ 8016: } /* --- end-of-while(1) --- */ 8017: } /* --- end-of-if(pright!=NULL) --- */ 8018: /* ------------------------------------------------------------------------- 8019: push past \left(_a^b sub/superscripts, if present 8020: -------------------------------------------------------------------------- */ 8021: pleft = *expression; /*reset pleft after opening \left( */ 8022: if ( (lp=rastlimits(expression,size,lp)) /*dummy call push expression past b*/ 8023: != NULL ) /* found actual _a^b scripts, too */ 8024: { delete_subraster(lp); /* but we don't need them */ 8025: lp = NULL; } /* reset pointer, too */ 8026: /* ------------------------------------------------------------------------- 8027: get \right delimiter and subexpression between \left...\right, xlate delims 8028: -------------------------------------------------------------------------- */ 8029: /* --- get delimiter following \right --- */ 8030: if ( pright == (char *)NULL ) { /* assume \right. at end of exprssn*/ 8031: strcpy(rdelim,"."); /* set default \right. */ 8032: sublen = strlen(*expression); /* use entire remaining expression */ 8033: memcpy(subexpr,*expression,sublen); /* copy all remaining chars */ 8034: *expression += sublen; } /* and push expression to its null */ 8035: else { /* have explicit matching \right */ 8036: sublen = (int)(pright-(*expression)); /* #chars between \left...\right */ 8037: memcpy(subexpr,*expression,sublen); /* copy chars preceding \right */ 8038: *expression = pright+strlen(right); /* push expression past \right */ 8039: skipwhite(*expression); /* interpret \right ) as \right) */ 8040: *expression = texchar(*expression,rdelim); /*pull delim from expression*/ 8041: if ( *rdelim == '\000' ) strcpy(rdelim,"."); } /* \right. if no rdelim */ 8042: /* --- get subexpression between \left...\right --- */ 8043: if ( sublen < 1 ) goto end_of_job; /* nothing between delimiters */ 8044: subexpr[sublen] = '\000'; /* and null-terminate it */ 8045: /* --- adjust margin for expressions containing \middle's --- */ 8046: if ( strtexchr(subexpr,"\\middle") != NULL ) /* have enclosed \middle's */ 8047: margin = 1; /* so don't "overwhelm" them */ 8048: /* --- check for operator delimiter --- */ 8049: for ( idelim=0; opdelims[idelim]!=NULL; idelim++ ) 8050: if ( strstr(ldelim,opdelims[idelim]) != NULL ) /* found operator */ 8051: { margin += opmargin; /* extra height for operator */ 8052: if ( *ldelim == '\\' ) /* have leading escape */ 8053: {strsqueeze(ldelim,1);} /* squeeze it out */ 8054: break; } /* no need to check rest of table */ 8055: /* --- xlate delimiters and check for textstyle --- */ 8056: for ( idelim=1; idelim<=2; idelim++ ) { /* 1=left, 2=right */ 8057: char *lrdelim = (idelim==1? ldelim:rdelim); /* ldelim or rdelim */ 8058: int ix; char *xdelim; /* xfrom[] and xto[] index, delim */ 8059: for( ix=0; (xdelim=xfrom[ix]) != NULL; ix++ ) 8060: if ( strcmp(lrdelim,xdelim) == 0 ) /* found delim to xlate */ 8061: { strcpy(lrdelim,xto[ix]); /* replace with corresponding xto[]*/ 8062: break; } /* no need to check further */ 8063: for( ix=0; (xdelim=textdelims[ix]) != NULL; ix++ ) 8064: if ( strstr(lrdelim,xdelim) != 0 ) /* found textstyle delim */ 8065: { if ( idelim == 1 ) /* if it's the \left one */ 8066: istextleft = 1; /* set left textstyle flag */ 8067: else istextright = 1; /* else set right textstyle flag */ 8068: break; } /* no need to check further */ 8069: } /* --- end-of-for(idelim) --- */ 8070: /* --- debugging --- */ 8071: if ( msgfp!=NULL && msglevel>=99 ) 8072: fprintf(msgfp,"rastleft> left=\"%s\" right=\"%s\" subexpr=\"%s\"\n", 8073: ldelim,rdelim,subexpr); 8074: /* ------------------------------------------------------------------------- 8075: rasterize subexpression 8076: -------------------------------------------------------------------------- */ 8077: /* --- rasterize subexpression --- */ 8078: if ( (sp = rasterize(subexpr,size)) /* rasterize chars between delims */ 8079: == NULL ) goto end_of_job; /* quit if failed */ 8080: height = (sp->image)->height; /* height of subexpr raster */ 8081: rheight = height+margin; /*default rheight as subexpr height*/ 8082: /* ------------------------------------------------------------------------- 8083: rasterize delimiters, reset baselines, and add sub/superscripts if present 8084: -------------------------------------------------------------------------- */ 8085: /* --- check for dot delimiter --- */ 8086: isleftdot = (strchr(ldelim,'.')!=NULL); /* true if \left. */ 8087: isrightdot = (strchr(rdelim,'.')!=NULL); /* true if \right. */ 8088: /* --- get rasters for best-fit delim characters, add sub/superscripts --- */ 8089: isdisplaystyle = (istextleft?0:9); /* force \displaystyle */ 8090: if ( !isleftdot ) /* if not \left. */ 8091: { /* --- first get requested \left delimiter --- */ 8092: lp = get_delim(ldelim,rheight,family); /* get \left delim char */ 8093: /* --- reset lp delim baseline to center delim on subexpr raster --- */ 8094: if ( lp != NULL ) /* if get_delim() succeeded */ 8095: { int lheight = (lp->image)->height; /* actual height of left delim */ 8096: lp->baseline = sp->baseline + (lheight - height)/2; 8097: if ( lheight > rheight ) /* got bigger delim than requested */ 8098: rheight = lheight-1; } /* make sure right delim matches */ 8099: /* --- then add on any sub/superscripts attached to \left( --- */ 8100: lp = rastlimits(&pleft,size,lp); /*\left(_a^b and push pleft past b*/ 8101: isleftscript = isscripted; } /* check if left delim scripted */ 8102: isdisplaystyle = (istextright?0:9); /* force \displaystyle */ 8103: if ( !isrightdot ) /* and if not \right. */ 8104: { /* --- first get requested \right delimiter --- */ 8105: rp = get_delim(rdelim,rheight,family); /* get \right delim char */ 8106: /* --- reset rp delim baseline to center delim on subexpr raster --- */ 8107: if ( rp != NULL ) /* if get_delim() succeeded */ 8108: rp->baseline = sp->baseline + ((rp->image)->height - height)/2; 8109: /* --- then add on any sub/superscripts attached to \right) --- */ 8110: rp = rastlimits(expression,size,rp); /*\right)_c^d, expression past d*/ 8111: isrightscript = isscripted; } /* check if right delim scripted */ 8112: isdisplaystyle = wasdisplaystyle; /* original \displystyle default */ 8113: /* --- check that we got delimiters --- */ 8114: if ( 0 ) 8115: if ( (lp==NULL && !isleftdot) /* check that we got left( */ 8116: || (rp==NULL && !isrightdot) ) /* and right) if needed */ 8117: { if ( lp != NULL ) free ((void *)lp); /* free \left-delim subraster */ 8118: if ( rp != NULL ) free ((void *)rp); /* and \right-delim subraster */ 8119: if (0) { delete_subraster(sp); /* if failed, free subraster */ 8120: sp = (subraster *)NULL; } /* signal error to caller */ 8121: goto end_of_job; } /* and quit */ 8122: /* ------------------------------------------------------------------------- 8123: concat lp || sp || rp components 8124: -------------------------------------------------------------------------- */ 8125: /* --- concat lp||sp||rp to obtain final result --- */ 8126: if ( lp != NULL ) /* ignore \left. */ 8127: sp = rastcat(lp,sp,3); /* concat lp||sp and free sp,lp */ 8128: if ( sp != NULL ) /* succeeded or ignored \left. */ 8129: if ( rp != NULL ) /* ignore \right. */ 8130: sp = rastcat(sp,rp,3); /* concat sp||rp and free sp,rp */ 8131: /* --- back to caller --- */ 8132: end_of_job: 8133: isdelimscript = isrightscript; /* signal if right delim scripted */ 8134: return ( sp ); 8135: } /* --- end-of-function rastleft() --- */ 8136: 8137: 8138: /* ========================================================================== 8139: * Function: rastright ( expression, size, basesp, ildelim, arg2, arg3 ) 8140: * Purpose: ...\right handler, intercepts an unexpected/unbalanced \right 8141: * -------------------------------------------------------------------------- 8142: * Arguments: expression (I) char ** to first char of null-terminated 8143: * string beginning with a \right 8144: * to be rasterized 8145: * size (I) int containing 0-7 default font size 8146: * basesp (I) subraster * to character (or subexpression) 8147: * immediately preceding leading left{ 8148: * (unused, but passed for consistency) 8149: * ildelim (I) int containing rdelims[] index of 8150: * right delimiter 8151: * arg2 (I) int unused 8152: * arg3 (I) int unused 8153: * -------------------------------------------------------------------------- 8154: * Returns: ( subraster * ) ptr to subraster corresponding to subexpr, 8155: * or NULL for any parsing error 8156: * -------------------------------------------------------------------------- 8157: * Notes: o 8158: * ======================================================================= */ 8159: /* --- entry point --- */ 8160: subraster *rastright ( char **expression, int size, subraster *basesp, 8161: int ildelim, int arg2, int arg3 ) 8162: { 8163: /* ------------------------------------------------------------------------- 8164: Allocations and Declarations 8165: -------------------------------------------------------------------------- */ 8166: subraster /* *rasterize(),*/ *sp=NULL; /*rasterize \right subexpr's*/ 8167: if ( sp != NULL ) /* returning entire expression */ 8168: { 8169: isreplaceleft = 1; /* set flag to replace left half*/ 8170: } 8171: return ( sp ); 8172: } /* --- end-of-function rastright() --- */ 8173: 8174: 8175: /* ========================================================================== 8176: * Function: rastmiddle ( expression, size, basesp, arg1, arg2, arg3 ) 8177: * Purpose: \middle handler, returns subraster corresponding to 8178: * entire expression with \middle delimiter(s) sized to fit. 8179: * -------------------------------------------------------------------------- 8180: * Arguments: expression (I/O) char ** to first char of null-terminated 8181: * string immediately following \middle to be 8182: * rasterized, and returning ptr immediately 8183: * to terminating null. 8184: * size (I) int containing 0-7 default font size 8185: * basesp (I) subraster * to character (or subexpression) 8186: * immediately preceding \middle 8187: * (unused, but passed for consistency) 8188: * arg1 (I) int unused 8189: * arg2 (I) int unused 8190: * arg3 (I) int unused 8191: * -------------------------------------------------------------------------- 8192: * Returns: ( subraster * ) ptr to subraster corresponding to expression, 8193: * or NULL for any parsing error 8194: * (expression ptr unchanged if error occurs) 8195: * -------------------------------------------------------------------------- 8196: * Notes: o 8197: * ======================================================================= */ 8198: /* --- entry point --- */ 8199: subraster *rastmiddle ( char **expression, int size, subraster *basesp, 8200: int arg1, int arg2, int arg3 ) 8201: { 8202: /* ------------------------------------------------------------------------- 8203: Allocations and Declarations 8204: -------------------------------------------------------------------------- */ 8205: subraster *rasterize(), *sp=NULL, *subsp[32]; /*rasterize \middle subexpr's*/ 8206: char *exprptr = *expression, /* local copy of ptr to expression */ 8207: *texchar(), delim[32][132], /* delimiters following \middle's */ 8208: *strtexchr(), /* locate \middle's */ 8209: subexpr[MAXSUBXSZ+1], *subptr=NULL;/*subexpression between \middle's*/ 8210: int height=0, habove=0, hbelow=0; /* height, above & below baseline */ 8211: int idelim, ndelims=0, /* \middle count (max 32) */ 8212: family = CMSYEX; /* delims from CMSY10 or CMEX10 */ 8213: subraster *subrastcpy(), /* copy subraster */ 8214: *rastcat(), /* concatanate subraster */ 8215: *get_delim(); /* get rasterized delimiter */ 8216: int delete_subraster(); /* free work area subsp[]'s at eoj */ 8217: /* ------------------------------------------------------------------------- 8218: initialization 8219: -------------------------------------------------------------------------- */ 8220: subsp[0] = leftexpression; /* expressn preceding 1st \middle */ 8221: subsp[1] = NULL; /* set first null */ 8222: /* ------------------------------------------------------------------------- 8223: accumulate subrasters between consecutive \middle\delim...\middle\delim...'s 8224: -------------------------------------------------------------------------- */ 8225: while ( ndelims < 30 ) /* max of 31 \middle's */ 8226: { 8227: /* --- maintain max height above,below baseline --- */ 8228: if ( subsp[ndelims] != NULL ) /*exprssn preceding current \middle*/ 8229: { int baseline = (subsp[ndelims])->baseline; /* #rows above baseline */ 8230: height = ((subsp[ndelims])->image)->height; /* tot #rows (height) */ 8231: habove = max2(habove,baseline); /* max #rows above baseline */ 8232: hbelow = max2(hbelow,height-baseline); } /* max #rows below baseline */ 8233: /* --- get delimter after \middle --- */ 8234: skipwhite(exprptr); /*skip space betwn \middle & \delim*/ 8235: exprptr = texchar(exprptr,delim[ndelims]); /* \delim after \middle */ 8236: if ( *(delim[ndelims]) == '\000' ) /* \middle at end-of-expression */ 8237: break; /* ignore it and consider job done */ 8238: ndelims++; /* count another \middle\delim */ 8239: /* --- get subexpression between \delim and next \middle --- */ 8240: subsp[ndelims] = NULL; /* no subexpresion yet */ 8241: if ( *exprptr == '\000' ) /* end-of-expression after \delim */ 8242: break; /* so we have all subexpressions */ 8243: if ( (subptr = strtexchr(exprptr,"\\middle")) /* find next \middle */ 8244: == NULL ) /* no more \middle's */ 8245: { strncpy(subexpr,exprptr,MAXSUBXSZ); /*get entire remaining expression*/ 8246: subexpr[MAXSUBXSZ] = '\000'; /* make sure it's null-terminated */ 8247: exprptr += strlen(exprptr); } /* push exprptr to terminating '\0'*/ 8248: else /* have another \middle */ 8249: { int sublen = (int)(subptr-exprptr); /* #chars between \delim...\middle*/ 8250: memcpy(subexpr,exprptr,min2(sublen,MAXSUBXSZ)); /* get subexpression */ 8251: subexpr[min2(sublen,MAXSUBXSZ)] = '\000'; /* and null-terminate it */ 8252: exprptr += (sublen+strlen("\\middle")); } /* push exprptr past \middle*/ 8253: /* --- rasterize subexpression --- */ 8254: subsp[ndelims] = rasterize(subexpr,size); /* rasterize subexpresion */ 8255: } /* --- end-of-while(1) --- */ 8256: /* ------------------------------------------------------------------------- 8257: construct \middle\delim's and concatanate them between subexpressions 8258: -------------------------------------------------------------------------- */ 8259: if ( ndelims < 1 /* no delims */ 8260: || (height=habove+hbelow) < 1 ) /* or no subexpressions? */ 8261: goto end_of_job; /* just flush \middle directive */ 8262: for ( idelim=0; idelim<=ndelims; idelim++ ) 8263: { 8264: /* --- first add on subexpression preceding delim --- */ 8265: if ( subsp[idelim] != NULL ) { /* have subexpr preceding delim */ 8266: if ( sp == NULL ) /* this is first piece */ 8267: { sp = subsp[idelim]; /* so just use it */ 8268: if ( idelim == 0 ) sp = subrastcpy(sp); } /* or copy leftexpression */ 8269: else sp = rastcat(sp,subsp[idelim],(idelim>0?3:1)); } /* or concat it */ 8270: /* --- now construct delimiter --- */ 8271: if ( *(delim[idelim]) != '\000' ) /* have delimter */ 8272: { subraster *delimsp = get_delim(delim[idelim],height,family); 8273: if ( delimsp != NULL ) /* rasterized delim */ 8274: { delimsp->baseline = habove; /* set baseline */ 8275: if ( sp == NULL ) /* this is first piece */ 8276: sp = delimsp; /* so just use it */ 8277: else sp = rastcat(sp,delimsp,3); } } /*or concat to existing pieces*/ 8278: } /* --- end-of-for(idelim) --- */ 8279: /* --- back to caller --- */ 8280: end_of_job: 8281: if ( 0 ) /* now handled above */ 8282: for ( idelim=1; idelim<=ndelims; idelim++ ) /* free subsp[]'s (not 0) */ 8283: if ( subsp[idelim] != NULL ) /* have allocated subraster */ 8284: delete_subraster(subsp[idelim]); /* so free it */ 8285: if ( sp != NULL ) /* returning entire expression */ 8286: { int newht = (sp->image)->height; /* height of returned subraster */ 8287: sp->baseline = min2(newht-1,newht/2+5); /* guess new baseline */ 8288: isreplaceleft = 1; /* set flag to replace left half*/ 8289: *expression += strlen(*expression); } /* and push to terminating null*/ 8290: return ( sp ); 8291: } /* --- end-of-function rastmiddle() --- */ 8292: 8293: 8294: /* ========================================================================== 8295: * Function: rastflags ( expression, size, basesp, flag, value, arg3 ) 8296: * Purpose: sets an internal flag, e.g., for \rm, or sets an internal 8297: * value, e.g., for \unitlength=<value>, and returns NULL 8298: * so nothing is displayed 8299: * -------------------------------------------------------------------------- 8300: * Arguments: expression (I) char ** to first char of null-terminated 8301: * LaTeX expression (unused/unchanged) 8302: * size (I) int containing base font size (not used, 8303: * just stored in subraster) 8304: * basesp (I) subraster * to character (or subexpression) 8305: * immediately preceding "flags" directive 8306: * (unused but passed for consistency) 8307: * flag (I) int containing #define'd symbol specifying 8308: * internal flag to be set 8309: * value (I) int containing new value of flag 8310: * arg3 (I) int unused 8311: * -------------------------------------------------------------------------- 8312: * Returns: ( subraster * ) NULL so nothing is displayed 8313: * -------------------------------------------------------------------------- 8314: * Notes: o 8315: * ======================================================================= */ 8316: /* --- entry point --- */ 8317: subraster *rastflags ( char **expression, int size, subraster *basesp, 8318: int flag, int value, int arg3 ) 8319: { 8320: /* ------------------------------------------------------------------------- 8321: Allocations and Declarations 8322: -------------------------------------------------------------------------- */ 8323: char *texsubexpr(), /* parse expression for... */ 8324: valuearg[1024]="NOVALUE"; /* value from expression, if needed */ 8325: int argvalue=NOVALUE, /* atoi(valuearg) */ 8326: isdelta=0, /* true if + or - precedes valuearg */ 8327: valuelen=0; /* strlen(valuearg) */ 8328: double dblvalue=(-99.), strtod(); /*convert ascii {valuearg} to double*/ 8329: static int displaystylelevel = (-99); /* \displaystyle set at recurlevel */ 8330: /* ------------------------------------------------------------------------- 8331: set flag or value 8332: -------------------------------------------------------------------------- */ 8333: switch ( flag ) 8334: { 8335: default: break; /* unrecognized flag */ 8336: case ISFONTFAM: 8337: if ( isthischar((*(*expression)),WHITEMATH) ) /* \rm followed by white */ 8338: (*expression)++; /* skip leading ~ after \rm */ 8339: fontnum = value; /* set font family */ 8340: break; 8341: case ISSTRING: isstring=value; break; /* set string/image mode */ 8342: case ISDISPLAYSTYLE: /* set \displaystyle mode */ 8343: displaystylelevel = recurlevel; /* \displaystyle set at recurlevel */ 8344: isdisplaystyle=value; break; 8345: case ISOPAQUE: istransparent=value; break; /* set transparent/opaque */ 8346: case ISREVERSE: /* reverse video */ 8347: if ( value==1 || value==NOVALUE ) 8348: { fgred=255-fgred; fggreen=255-fggreen; fgblue=255-fgblue; } 8349: if ( value==2 || value==NOVALUE ) 8350: { bgred=255-bgred; bggreen=255-bggreen; bgblue=255-bgblue; } 8351: if ( value==2 || value==NOVALUE ) 8352: isblackonwhite = !isblackonwhite; 8353: if ( gammacorrection > 0.0001 ) /* have gamma correction */ 8354: gammacorrection = REVERSEGAMMA; /* use reverse video gamma instead */ 8355: break; 8356: case ISSUPER: /* set supersampling/lowpass flag */ 8357: #ifndef SSFONTS /* don't have ss fonts loaded */ 8358: value = 0; /* so force lowpass */ 8359: #endif 8360: isss = issupersampling = value; 8361: fonttable = (issupersampling?ssfonttable:aafonttable); /* set fonts */ 8362: break; 8363: case ISFONTSIZE: /* set fontsize */ 8364: case ISMAGSTEP: /* set magstep */ 8365: case ISDISPLAYSIZE: /* set displaysize */ 8366: case ISCONTENTTYPE: /*enable/disable content-type lines*/ 8367: case ISCONTENTCACHED: /* write content-type to cache file*/ 8368: case ISSHRINK: /* set shrinkfactor */ 8369: case ISAAALGORITHM: /* set anti-aliasing algorithm */ 8370: case ISWEIGHT: /* set font weight */ 8371: case ISCENTERWT: /* set lowpass center pixel weight */ 8372: case ISADJACENTWT: /* set lowpass adjacent weight */ 8373: case ISCORNERWT: /* set lowpass corner weight */ 8374: case ISCOLOR: /* set red(1),green(2),blue(3) */ 8375: case ISSMASH: /* set (minimum) "smash" margin */ 8376: case ISGAMMA: /* set gamma correction */ 8377: if ( value != NOVALUE ) /* passed a fixed value to be set */ 8378: { argvalue = value; /* set given fixed int value */ 8379: dblvalue = (double)value; } /* or maybe interpreted as double */ 8380: else /* get value from expression */ 8381: { *expression = texsubexpr(*expression,valuearg,1023,"{","}",0,0); 8382: if ( *valuearg != '\000' ) /* guard against empty string */ 8383: if ( !isalpha(*valuearg) ) /* and against alpha string args */ 8384: if ( !isthischar(*valuearg,"?") ) /*leading ? is query for value*/ 8385: { isdelta = isthischar(*valuearg,"+-"); /* leading + or - */ 8386: if ( memcmp(valuearg,"--",2) == 0 ) /* leading -- signals...*/ 8387: { isdelta=0; strsqueeze(valuearg,1); } /* ...not delta */ 8388: switch ( flag ) { /* convert to double or int */ 8389: default: argvalue = atoi(valuearg); break; /* convert to int */ 8390: case ISGAMMA: 8391: dblvalue = strtod(valuearg,NULL); break; } /* or to double */ 8392: } /* --- end-of-if(*valuearg!='?') --- */ 8393: } /* --- end-of-if(value==NOVALUE) --- */ 8394: switch ( flag ) 8395: { 8396: default: break; 8397: case ISCOLOR: /* set color */ 8398: slower(valuearg); /* convert arg to lower case */ 8399: if ( argvalue==1 || strstr(valuearg,"red") ) 8400: { fggreen = fgblue = (isblackonwhite?0:255); 8401: fgred = (isblackonwhite?255:0); } 8402: if ( argvalue==2 || strstr(valuearg,"green") ) 8403: { fgred = fgblue = (isblackonwhite?0:255); 8404: fggreen = (isblackonwhite?255:0); } 8405: if ( argvalue==3 || strstr(valuearg,"blue") ) 8406: { fgred = fggreen = (isblackonwhite?0:255); 8407: fgblue = (isblackonwhite?255:0); } 8408: if ( argvalue==0 || strstr(valuearg,"black") ) 8409: fgred = fggreen = fgblue = (isblackonwhite?0:255); 8410: if ( argvalue==7 || strstr(valuearg,"white") ) 8411: fgred = fggreen = fgblue = (isblackonwhite?255:0); 8412: break; 8413: case ISFONTSIZE: /* set fontsize */ 8414: if ( argvalue != NOVALUE ) /* got a value */ 8415: { int largestsize = (issupersampling?16:LARGESTSIZE); 8416: fontsize = (isdelta? fontsize+argvalue : argvalue); 8417: fontsize = max2(0,min2(fontsize,largestsize)); 8418: shrinkfactor = shrinkfactors[fontsize]; 8419: if ( isdisplaystyle == 1 /* displaystyle enabled but not set*/ 8420: || (1 && isdisplaystyle==2) /* displaystyle enabled and set */ 8421: || (0 && isdisplaystyle==0) )/*\textstyle disabled displaystyle*/ 8422: if ( displaystylelevel != recurlevel ) /*respect \displaystyle*/ 8423: if ( !ispreambledollars ) { /* respect $$...$$'s */ 8424: if ( fontsize >= displaysize ) 8425: isdisplaystyle = 2; /* forced */ 8426: else isdisplaystyle = 1; } 8427: /*displaystylelevel = (-99);*/ } /* reset \displaystyle level */ 8428: else /* embed font size in expression */ 8429: { sprintf(valuearg,"%d",fontsize); /* convert size */ 8430: valuelen = strlen(valuearg); /* ought to be 1 */ 8431: if ( *expression != '\000' ) /* ill-formed expression */ 8432: { *expression = (char *)(*expression-valuelen); /*back up buff*/ 8433: memcpy(*expression,valuearg,valuelen); } } /*and put in size*/ 8434: break; 8435: case ISMAGSTEP: /* set magstep */ 8436: if ( argvalue != NOVALUE ) { /* got a value */ 8437: int largestmag = 10; 8438: magstep = (isdelta? magstep+argvalue : argvalue); 8439: magstep = max2(1,min2(magstep,largestmag)); } 8440: break; 8441: case ISDISPLAYSIZE: /* set displaysize */ 8442: if ( argvalue != NOVALUE ) /* got a value */ 8443: displaysize = (isdelta? displaysize+argvalue : argvalue); 8444: break; 8445: case ISCONTENTTYPE: /*enable/disable content-type lines*/ 8446: if ( argvalue != NOVALUE ) /* got a value */ 8447: isemitcontenttype = (argvalue>0?1:0); 8448: break; 8449: case ISCONTENTCACHED: /* write content-type to cache file*/ 8450: if ( argvalue != NOVALUE ) /* got a value */ 8451: iscachecontenttype = (argvalue>0?1:0); 8452: break; 8453: case ISSMASH: /* set (minimum) "smash" margin */ 8454: if ( argvalue != NOVALUE ) /* got a value */ 8455: { smashmargin = argvalue; /* set value */ 8456: if ( arg3 != NOVALUE ) isdelta=arg3; /* hard-coded isdelta */ 8457: issmashdelta = (isdelta?1:0); } /* and set delta flag */ 8458: smashmargin = max2((isdelta?-5:0),min2(smashmargin,32)); /*sanity*/ 8459: isexplicitsmash = 1; /* signal explicit \smash directive*/ 8460: break; 8461: case ISSHRINK: /* set shrinkfactor */ 8462: if ( argvalue != NOVALUE ) /* got a value */ 8463: shrinkfactor = (isdelta? shrinkfactor+argvalue : argvalue); 8464: shrinkfactor = max2(1,min2(shrinkfactor,27)); /* sanity check */ 8465: break; 8466: case ISAAALGORITHM: /* set anti-aliasing algorithm */ 8467: if ( argvalue != NOVALUE ) { /* got a value */ 8468: if ( argvalue >= 0 ) { /* non-negative to set algorithm */ 8469: aaalgorithm = argvalue; /* set algorithm number */ 8470: aaalgorithm = max2(0,min2(aaalgorithm,4)); } /* bounds check */ 8471: else maxfollow = abs(argvalue); } /* or maxfollow=abs(negative#) */ 8472: break; 8473: case ISWEIGHT: /* set font weight number */ 8474: value = (argvalue==NOVALUE? NOVALUE : /* don't have a value */ 8475: (isdelta? weightnum+argvalue : argvalue)); 8476: if ( value>=0 && value<maxaaparams ) /* in range */ 8477: { weightnum = value; /* reset weightnum index */ 8478: minadjacent = aaparams[weightnum].minadjacent; 8479: maxadjacent = aaparams[weightnum].maxadjacent; 8480: cornerwt = aaparams[weightnum].cornerwt; 8481: adjacentwt = aaparams[weightnum].adjacentwt; 8482: centerwt = aaparams[weightnum].centerwt; 8483: fgalias = aaparams[weightnum].fgalias; 8484: fgonly = aaparams[weightnum].fgonly; 8485: bgalias = aaparams[weightnum].bgalias; 8486: bgonly = aaparams[weightnum].bgonly; } 8487: break; 8488: case ISCENTERWT: /* set lowpass center pixel weight */ 8489: if ( argvalue != NOVALUE ) /* got a value */ 8490: centerwt = argvalue; /* set lowpass center weight */ 8491: break; 8492: case ISADJACENTWT: /* set lowpass adjacent weight */ 8493: if ( argvalue != NOVALUE ) /* got a value */ 8494: adjacentwt = argvalue; /* set lowpass adjacent weight */ 8495: break; 8496: case ISCORNERWT: /* set lowpass corner weight */ 8497: if ( argvalue != NOVALUE ) /* got a value */ 8498: cornerwt = argvalue; /* set lowpass corner weight */ 8499: break; 8500: case ISGAMMA: /* set gamma correction */ 8501: if ( dblvalue >= 0.0 ) /* got a value */ 8502: gammacorrection = dblvalue; /* set gamma correction */ 8503: break; 8504: } /* --- end-of-switch() --- */ 8505: break; 8506: case PNMPARAMS: /*set fgalias,fgonly,bgalias,bgonly*/ 8507: *expression = texsubexpr(*expression,valuearg,1023,"{","}",0,0); 8508: valuelen = strlen(valuearg); /* ought to be 1-4 */ 8509: if ( valuelen>0 && isthischar(toupper(valuearg[0]),"TY1") ) fgalias=1; 8510: if ( valuelen>0 && isthischar(toupper(valuearg[0]),"FN0") ) fgalias=0; 8511: if ( valuelen>1 && isthischar(toupper(valuearg[1]),"TY1") ) fgonly =1; 8512: if ( valuelen>1 && isthischar(toupper(valuearg[1]),"FN0") ) fgonly =0; 8513: if ( valuelen>2 && isthischar(toupper(valuearg[2]),"TY1") ) bgalias=1; 8514: if ( valuelen>2 && isthischar(toupper(valuearg[2]),"FN0") ) bgalias=0; 8515: if ( valuelen>3 && isthischar(toupper(valuearg[3]),"TY1") ) bgonly =1; 8516: if ( valuelen>3 && isthischar(toupper(valuearg[3]),"FN0") ) bgonly =0; 8517: break; 8518: case UNITLENGTH: 8519: if ( value != NOVALUE ) /* passed a fixed value to be set */ 8520: unitlength = (double)(value); /* set given fixed value */ 8521: else /* get value from expression */ 8522: { *expression = texsubexpr(*expression,valuearg,1023,"{","}",0,0); 8523: if ( *valuearg != '\000' ) /* guard against empty string */ 8524: unitlength = strtod(valuearg,NULL); } /* convert to double */ 8525: iunitlength = (int)(unitlength+0.5); /* iunitlength reset */ 8526: break; 8527: } /* --- end-of-switch(flag) --- */ 8528: return ( NULL ); /*just set value, nothing to display*/ 8529: } /* --- end-of-function rastflags() --- */ 8530: 8531: 8532: /* ========================================================================== 8533: * Function: rastspace(expression, size, basesp, width, isfill, isheight) 8534: * Purpose: returns a blank/space subraster width wide, 8535: * with baseline and height corresponding to basep 8536: * -------------------------------------------------------------------------- 8537: * Arguments: expression (I) char ** to first char of null-terminated 8538: * LaTeX expression (unused/unchanged) 8539: * size (I) int containing base font size (not used, 8540: * just stored in subraster) 8541: * basesp (I) subraster * to character (or subexpression) 8542: * immediately preceding space, whose baseline 8543: * and height params are transferred to space 8544: * width (I) int containing #bits/pixels for space width 8545: * isfill (I) int containing true to \hfill complete 8546: * expression out to width 8547: * (Kludge: isfill=99 signals \hspace* 8548: * for negative space) 8549: * isheight (I) int containing true (but not NOVALUE) 8550: * to treat width arg as height 8551: * -------------------------------------------------------------------------- 8552: * Returns: ( subraster * ) ptr to empty/blank subraster 8553: * or NULL for any error 8554: * -------------------------------------------------------------------------- 8555: * Notes: o 8556: * ======================================================================= */ 8557: /* --- entry point --- */ 8558: subraster *rastspace ( char **expression, int size, subraster *basesp, 8559: int width, int isfill, int isheight ) 8560: { 8561: /* ------------------------------------------------------------------------- 8562: Allocations and Declarations 8563: -------------------------------------------------------------------------- */ 8564: subraster *new_subraster(), *spacesp=NULL; /* subraster for space */ 8565: raster *bp=NULL, *backspace_raster(); /* for negative space */ 8566: int delete_subraster(); /* if fail, free unneeded subraster*/ 8567: int baseht=1, baseln=0; /* height,baseline of base symbol */ 8568: int pixsz = 1; /*default #bits per pixel, 1=bitmap*/ 8569: int isstar=0, minspace=0; /* defaults for negative hspace */ 8570: char *texsubexpr(), widtharg[256]; /* parse for optional {width} */ 8571: int evalterm(), evalue=0; /* evaluate [args], {args} */ 8572: subraster *rasterize(), *rightsp=NULL; /*rasterize right half of expression*/ 8573: subraster *rastcat(); /* cat rightsp after \hfill */ 8574: /* ------------------------------------------------------------------------- 8575: initialization 8576: -------------------------------------------------------------------------- */ 8577: if ( isfill > 1 ) { isstar=1; isfill=0; } /* large fill signals \hspace* */ 8578: if ( isfill == NOVALUE ) isfill=0; /* novalue means false */ 8579: if ( isheight == NOVALUE ) isheight=0; /* novalue means false */ 8580: minspace = (isstar?(-1):0); /* reset default minspace */ 8581: /* ------------------------------------------------------------------------- 8582: determine width if not given (e.g., \hspace{width}, \hfill{width}) 8583: -------------------------------------------------------------------------- */ 8584: if ( width == 0 ) { /* width specified in expression */ 8585: double dwidth; int widthval; /* test {width} before using it */ 8586: int minwidth = (isfill||isheight?1:-600); /* \hspace allows negative */ 8587: /* --- check if optional [minspace] given for negative \hspace --- */ 8588: if ( *(*expression) == '[' ) { /* [minspace] if leading char is [ */ 8589: /* ---parse [minspace], bump expression past it, evaluate expression--- */ 8590: *expression = texsubexpr(*expression,widtharg,127,"[","]",0,0); 8591: if ( !isempty(widtharg) ) { /* got [minspace] */ 8592: evalue = evalterm(mimestore,widtharg); /* evaluate widtharg expr */ 8593: minspace = iround(unitlength*((double)evalue)); } /* in pixels */ 8594: } /* --- end-of-if(*(*expression)=='[') --- */ 8595: width = 1; /* set default width */ 8596: *expression = texsubexpr(*expression,widtharg,255,"{","}",0,0); 8597: dwidth = unitlength*((double)evalterm(mimestore,widtharg)); /* scaled */ 8598: widthval = /* convert {width} to integer */ 8599: (int)( dwidth + (dwidth>=0.0?0.5:(-0.5)) ); 8600: if ( widthval>=minwidth && widthval<=600 ) /* sanity check */ 8601: width = widthval; /* replace deafault width */ 8602: } /* --- end-of-if(width==0) --- */ 8603: /* ------------------------------------------------------------------------- 8604: first check for negative space 8605: -------------------------------------------------------------------------- */ 8606: if ( width < 0 ) { /* have negative hspace */ 8607: if ( leftexpression != (subraster *)NULL ) /* can't backspace */ 8608: if ( (spacesp=new_subraster(0,0,0)) /* get new subraster for backspace */ 8609: != NULL ) { /* and if we succeed... */ 8610: int nback=(-width), pback; /*#pixels wanted,actually backspaced*/ 8611: if ( (bp=backspace_raster(leftexpression->image,nback,&pback,minspace,0)) 8612: != NULL ) { /* and if backspace succeeds... */ 8613: spacesp->image = bp; /* save backspaced image */ 8614: /*spacesp->type = leftexpression->type;*/ /* copy original type */ 8615: spacesp->type = blanksignal; /* need to propagate blanks */ 8616: spacesp->size = leftexpression->size; /* copy original font size */ 8617: spacesp->baseline = leftexpression->baseline; /* and baseline */ 8618: blanksymspace += -(nback-pback); /* wanted more than we got */ 8619: isreplaceleft = 1; } /*signal to replace entire expressn*/ 8620: else { /* backspace failed */ 8621: delete_subraster(spacesp); /* free unneeded envelope */ 8622: spacesp = (subraster *)NULL; } } /* and signal failure */ 8623: goto end_of_job; 8624: } /* --- end-of-if(width<0) --- */ 8625: /* ------------------------------------------------------------------------- 8626: see if width is "absolute" or fill width 8627: -------------------------------------------------------------------------- */ 8628: if ( isfill /* called as \hfill{} */ 8629: && !isheight ) /* parameter conflict */ 8630: { if ( leftexpression != NULL ) /* if we have left half */ 8631: width -= (leftexpression->image)->width; /*reduce left width from total*/ 8632: if ( (rightsp=rasterize(*expression,size)) /* rasterize right half */ 8633: != NULL ) /* succeeded */ 8634: width -= (rightsp->image)->width; } /* reduce right width from total */ 8635: /* ------------------------------------------------------------------------- 8636: construct blank subraster, and return it to caller 8637: -------------------------------------------------------------------------- */ 8638: /* --- get parameters from base symbol --- */ 8639: if ( basesp != (subraster *)NULL ) /* we have base symbol for space */ 8640: { baseht = (basesp->image)->height; /* height of base symbol */ 8641: baseln = basesp->baseline; } /* and its baseline */ 8642: /* --- flip params for height --- */ 8643: if ( isheight ) /* width is actually height */ 8644: { baseht = width; /* use given width as height */ 8645: width = 1; } /* and set default width */ 8646: /* --- generate and init space subraster --- */ 8647: if ( width > 0 ) /*make sure we have positive width*/ 8648: if ( (spacesp=new_subraster(width,baseht,pixsz)) /*generate space subraster*/ 8649: != NULL ) /* and if we succeed... */ 8650: { /* --- ...re-init subraster parameters --- */ 8651: spacesp->size = size; /*propagate base font size forward*/ 8652: if(1)spacesp->type = blanksignal; /* need to propagate blanks (???) */ 8653: spacesp->baseline = baseln; } /* ditto baseline */ 8654: /* ------------------------------------------------------------------------- 8655: concat right half if \hfill-ing 8656: -------------------------------------------------------------------------- */ 8657: if ( rightsp != NULL ) /* we have a right half after fill */ 8658: { spacesp = (spacesp==NULL? rightsp: /* no space, so just use right half*/ 8659: rastcat(spacesp,rightsp,3)); /* or cat right half after space */ 8660: spacesp->type = blanksignal; /* need to propagate blanks */ 8661: *expression += strlen((*expression)); } /* push expression to its null */ 8662: end_of_job: 8663: return ( spacesp ); 8664: } /* --- end-of-function rastspace() --- */ 8665: 8666: 8667: /* ========================================================================== 8668: * Function: rastnewline ( expression, size, basesp, arg1, arg2, arg3 ) 8669: * Purpose: \\ handler, returns subraster corresponding to 8670: * left-hand expression preceding \\ above right-hand expression 8671: * -------------------------------------------------------------------------- 8672: * Arguments: expression (I/O) char ** to first char of null-terminated 8673: * string immediately following \\ to be 8674: * rasterized, and returning ptr immediately 8675: * to terminating null. 8676: * size (I) int containing 0-7 default font size 8677: * basesp (I) subraster * to character (or subexpression) 8678: * immediately preceding \\ 8679: * (unused, but passed for consistency) 8680: * arg1 (I) int unused 8681: * arg2 (I) int unused 8682: * arg3 (I) int unused 8683: * -------------------------------------------------------------------------- 8684: * Returns: ( subraster * ) ptr to subraster corresponding to expression, 8685: * or NULL for any parsing error 8686: * (expression ptr unchanged if error occurs) 8687: * -------------------------------------------------------------------------- 8688: * Notes: o 8689: * ======================================================================= */ 8690: /* --- entry point --- */ 8691: subraster *rastnewline ( char **expression, int size, subraster *basesp, 8692: int arg1, int arg2, int arg3 ) 8693: { 8694: /* ------------------------------------------------------------------------- 8695: Allocations and Declarations 8696: -------------------------------------------------------------------------- */ 8697: subraster *rastack(), *newlsp=NULL; /* subraster for both lines */ 8698: subraster *rasterize(), *rightsp=NULL; /*rasterize right half of expression*/ 8699: char *texsubexpr(), spacexpr[129]/*, *xptr=spacexpr*/; /*for \\[vspace]*/ 8700: int evalterm(), evalue=0; /* evaluate [arg], {arg} */ 8701: int vspace = size+2; /* #pixels between lines */ 8702: /* ------------------------------------------------------------------------- 8703: obtain optional [vspace] argument immediately following \\ command 8704: -------------------------------------------------------------------------- */ 8705: /* --- check if [vspace] given --- */ 8706: if ( *(*expression) == '[' ) /*have [vspace] if leading char is [*/ 8707: { 8708: /* ---parse [vspace] and bump expression past it, interpret as double--- */ 8709: *expression = texsubexpr(*expression,spacexpr,127,"[","]",0,0); 8710: if ( *spacexpr == '\000' ) goto end_of_job; /* couldn't get [vspace] */ 8711: evalue = evalterm(mimestore,spacexpr); /* evaluate [space] arg */ 8712: vspace = iround(unitlength*((double)evalue)); /* vspace in pixels */ 8713: } /* --- end-of-if(*(*expression)=='[') --- */ 8714: if ( leftexpression == NULL ) goto end_of_job; /* nothing preceding \\ */ 8715: /* ------------------------------------------------------------------------- 8716: rasterize right half of expression and stack left half above it 8717: -------------------------------------------------------------------------- */ 8718: /* --- rasterize right half --- */ 8719: if ( (rightsp=rasterize(*expression,size)) /* rasterize right half */ 8720: == NULL ) goto end_of_job; /* quit if failed */ 8721: /* --- stack left half above it --- */ 8722: /*newlsp = rastack(rightsp,leftexpression,1,vspace,0,3);*//*right under left*/ 8723: newlsp = rastack(rightsp,leftexpression,1,vspace,0,1); /*right under left*/ 8724: /* --- back to caller --- */ 8725: end_of_job: 8726: if ( newlsp != NULL ) /* returning entire expression */ 8727: { int newht = (newlsp->image)->height; /* height of returned subraster */ 8728: newlsp->baseline = min2(newht-1,newht/2+5); /* guess new baseline */ 8729: isreplaceleft = 1; /* so set flag to replace left half*/ 8730: *expression += strlen(*expression); } /* and push to terminating null*/ 8731: return ( newlsp ); /* 1st line over 2nd, or null=error*/ 8732: } /* --- end-of-function rastnewline() --- */ 8733: 8734: 8735: /* ========================================================================== 8736: * Function: rastarrow ( expression, size, basesp, drctn, isBig, arg3 ) 8737: * Purpose: returns left/right arrow subraster (e.g., for \longrightarrow) 8738: * -------------------------------------------------------------------------- 8739: * Arguments: expression (I) char ** to first char of null-terminated 8740: * LaTeX expression (unused/unchanged) 8741: * size (I) int containing base font size (not used, 8742: * just stored in subraster) 8743: * basesp (I) subraster * to character (or subexpression) 8744: * immediately preceding space, whose baseline 8745: * and height params are transferred to space 8746: * drctn (I) int containing +1 for right, -1 for left, 8747: * or 0 for leftright 8748: * isBig (I) int containing 0 for ---> or 1 for ===> 8749: * arg3 (I) int unused 8750: * -------------------------------------------------------------------------- 8751: * Returns: ( subraster * ) ptr to left/right arrow subraster 8752: * or NULL for any error 8753: * -------------------------------------------------------------------------- 8754: * Notes: o An optional argument [width] may *immediately* follow 8755: * the \longxxx to explicitly set the arrow's width in pixels. 8756: * For example, \longrightarrow calculates a default width 8757: * (as usual in LaTeX), whereas \longrightarrow[50] explicitly 8758: * draws a 50-pixel long arrow. This can be used, e.g., 8759: * to draw commutative diagrams in conjunction with 8760: * \array (and maybe with \stackrel and/or \relstack, too). 8761: * o In case you really want to render, say, [f]---->[g], just 8762: * use an intervening space, i.e., [f]\longrightarrow~[g]. 8763: * In text mode use two spaces {\rm~[f]\longrightarrow~~[g]}. 8764: * ======================================================================= */ 8765: /* --- entry point --- */ 8766: subraster *rastarrow ( char **expression, int size, subraster *basesp, 8767: int drctn, int isBig, int arg3 ) 8768: { 8769: /* ------------------------------------------------------------------------- 8770: Allocations and Declarations 8771: -------------------------------------------------------------------------- */ 8772: subraster *arrow_subraster(), *arrowsp=NULL; /* subraster for arrow */ 8773: char *texsubexpr(), widtharg[256]; /* parse for optional [width] */ 8774: char *texscripts(), sub[1024],super[1024]; /* and _^limits after [width]*/ 8775: subraster *rasterize(), *subsp=NULL,*supsp=NULL; /*rasterize limits*/ 8776: subraster *new_subraster(), *rastack(), *spacesp=NULL; /*space below arrow*/ 8777: int delete_subraster(); /*free work areas in case of error*/ 8778: int evalterm(); /* evaluate [arg], {arg} */ 8779: int width = 10 + 8*size, height; /* width, height for \longxxxarrow */ 8780: int islimits = 1; /*true to handle limits internally*/ 8781: int limsize = size-1; /* font size for limits */ 8782: int vspace = 1; /* #empty rows below arrow */ 8783: int pixsz = 1; /*default #bits per pixel, 1=bitmap*/ 8784: /* ------------------------------------------------------------------------- 8785: construct longleft/rightarrow subraster, with limits, and return it to caller 8786: -------------------------------------------------------------------------- */ 8787: /* --- check for optional width arg and replace default width --- */ 8788: if ( *(*expression) == '[' ) /*check for []-enclosed optional arg*/ 8789: { int widthval; /* test [width] before using it */ 8790: *expression = texsubexpr(*expression,widtharg,255,"[","]",0,0); 8791: widthval = /* convert [width] to integer */ 8792: (int)((unitlength*((double)evalterm(mimestore,widtharg)))+0.5); 8793: if ( widthval>=2 && widthval<=600 ) /* sanity check */ 8794: width = widthval; } /* replace deafault width */ 8795: /* --- now parse for limits, and bump expression past it(them) --- */ 8796: if ( islimits ) /* handling limits internally */ 8797: { *expression = texscripts(*expression,sub,super,3); /* parse for limits */ 8798: if ( *sub != '\000' ) /*have a subscript following arrow*/ 8799: subsp = rasterize(sub,limsize); /* so try to rasterize subscript */ 8800: if ( *super != '\000' ) /*have superscript following arrow*/ 8801: supsp = rasterize(super,limsize); } /*so try to rasterize superscript*/ 8802: /* --- set height based on width --- */ 8803: height = min2(17,max2(9,(width+2)/6)); /* height based on width */ 8804: height = 1 + (height/2)*2; /* always force odd height */ 8805: /* --- generate arrow subraster --- */ 8806: if ( (arrowsp=arrow_subraster(width,height,pixsz,drctn,isBig)) /*build arrow*/ 8807: == NULL ) goto end_of_job; /* and quit if we failed */ 8808: /* --- add space below arrow --- */ 8809: if ( vspace > 0 ) /* if we have space below arrow */ 8810: if ( (spacesp=new_subraster(width,vspace,pixsz)) /*allocate required space*/ 8811: != NULL ) /* and if we succeeded */ 8812: if ( (arrowsp = rastack(spacesp,arrowsp,2,0,1,3)) /* space below arrow */ 8813: == NULL ) goto end_of_job; /* and quit if we failed */ 8814: /* --- init arrow subraster parameters --- */ 8815: arrowsp->size = size; /*propagate base font size forward*/ 8816: arrowsp->baseline = height+vspace-1; /* set baseline at bottom of arrow */ 8817: /* --- add limits above/below arrow, as necessary --- */ 8818: if ( subsp != NULL ) /* stack subscript below arrow */ 8819: if ( (arrowsp = rastack(subsp,arrowsp,2,0,1,3)) /* subscript below arrow */ 8820: == NULL ) goto end_of_job; /* quit if failed */ 8821: if ( supsp != NULL ) /* stack superscript above arrow */ 8822: if ( (arrowsp = rastack(arrowsp,supsp,1,vspace,1,3)) /*supsc above arrow*/ 8823: == NULL ) goto end_of_job; /* quit if failed */ 8824: /* --- return arrow (or NULL) to caller --- */ 8825: end_of_job: 8826: return ( arrowsp ); 8827: } /* --- end-of-function rastarrow() --- */ 8828: 8829: 8830: /* ========================================================================== 8831: * Function: rastuparrow ( expression, size, basesp, drctn, isBig, arg3 ) 8832: * Purpose: returns an up/down arrow subraster (e.g., for \longuparrow) 8833: * -------------------------------------------------------------------------- 8834: * Arguments: expression (I) char ** to first char of null-terminated 8835: * LaTeX expression (unused/unchanged) 8836: * size (I) int containing base font size (not used, 8837: * just stored in subraster) 8838: * basesp (I) subraster * to character (or subexpression) 8839: * immediately preceding space, whose baseline 8840: * and height params are transferred to space 8841: * drctn (I) int containing +1 for up, -1 for down, 8842: * or 0 for updown 8843: * isBig (I) int containing 0 for ---> or 1 for ===> 8844: * arg3 (I) int unused 8845: * -------------------------------------------------------------------------- 8846: * Returns: ( subraster * ) ptr to up/down arrow subraster 8847: * or NULL for any error 8848: * -------------------------------------------------------------------------- 8849: * Notes: o An optional argument [height] may *immediately* follow 8850: * the \longxxx to explicitly set the arrow's height in pixels. 8851: * For example, \longuparrow calculates a default height 8852: * (as usual in LaTeX), whereas \longuparrow[25] explicitly 8853: * draws a 25-pixel high arrow. This can be used, e.g., 8854: * to draw commutative diagrams in conjunction with 8855: * \array (and maybe with \stackrel and/or \relstack, too). 8856: * o In case you really want to render, say, [f]---->[g], just 8857: * use an intervening space, i.e., [f]\longuparrow~[g]. 8858: * In text use two spaces {\rm~[f]\longuparrow~~[g]}. 8859: * ======================================================================= */ 8860: /* --- entry point --- */ 8861: subraster *rastuparrow ( char **expression, int size, subraster *basesp, 8862: int drctn, int isBig, int arg3 ) 8863: { 8864: /* ------------------------------------------------------------------------- 8865: Allocations and Declarations 8866: -------------------------------------------------------------------------- */ 8867: subraster *uparrow_subraster(), *arrowsp=NULL; /* subraster for arrow */ 8868: char *texsubexpr(), heightarg[256]; /* parse for optional [height] */ 8869: char *texscripts(), sub[1024],super[1024]; /* and _^limits after [width]*/ 8870: subraster *rasterize(), *subsp=NULL,*supsp=NULL; /*rasterize limits*/ 8871: subraster *rastcat(); /* cat superscript left, sub right */ 8872: int evalterm(); /* evaluate [arg], {arg} */ 8873: int height = 8 + 2*size, width; /* height, width for \longxxxarrow */ 8874: int islimits = 1; /*true to handle limits internally*/ 8875: int limsize = size-1; /* font size for limits */ 8876: int pixsz = 1; /*default #bits per pixel, 1=bitmap*/ 8877: /* ------------------------------------------------------------------------- 8878: construct blank subraster, and return it to caller 8879: -------------------------------------------------------------------------- */ 8880: /* --- check for optional height arg and replace default height --- */ 8881: if ( *(*expression) == '[' ) /*check for []-enclosed optional arg*/ 8882: { int heightval; /* test height before using it */ 8883: *expression = texsubexpr(*expression,heightarg,255,"[","]",0,0); 8884: heightval = /* convert [height] to integer */ 8885: (int)((unitlength*((double)evalterm(mimestore,heightarg)))+0.5); 8886: if ( heightval>=2 && heightval<=600 ) /* sanity check */ 8887: height = heightval; } /* replace deafault height */ 8888: /* --- now parse for limits, and bump expression past it(them) --- */ 8889: if ( islimits ) /* handling limits internally */ 8890: { *expression = texscripts(*expression,sub,super,3); /* parse for limits */ 8891: if ( *sub != '\000' ) /*have a subscript following arrow*/ 8892: subsp = rasterize(sub,limsize); /* so try to rasterize subscript */ 8893: if ( *super != '\000' ) /*have superscript following arrow*/ 8894: supsp = rasterize(super,limsize); } /*so try to rasterize superscript*/ 8895: /* --- set width based on height --- */ 8896: width = min2(17,max2(9,(height+2)/4)); /* width based on height */ 8897: width = 1 + (width/2)*2; /* always force odd width */ 8898: /* --- generate arrow subraster --- */ 8899: if ( (arrowsp=uparrow_subraster(width,height,pixsz,drctn,isBig)) /*build arr*/ 8900: == NULL ) goto end_of_job; /* and quit if we failed */ 8901: /* --- init arrow subraster parameters --- */ 8902: arrowsp->size = size; /*propagate base font size forward*/ 8903: arrowsp->baseline = height-1; /* set baseline at bottom of arrow */ 8904: /* --- add limits above/below arrow, as necessary --- */ 8905: if ( supsp != NULL ) /* cat superscript to left of arrow*/ 8906: { int supht = (supsp->image)->height, /* superscript height */ 8907: deltab = (1+abs(height-supht))/2; /* baseline difference to center */ 8908: supsp->baseline = supht-1; /* force script baseline to bottom */ 8909: if ( supht <= height ) /* arrow usually taller than script*/ 8910: arrowsp->baseline -= deltab; /* so bottom of script goes here */ 8911: else supsp->baseline -= deltab; /* else bottom of arrow goes here */ 8912: if ( (arrowsp = rastcat(supsp,arrowsp,3)) /* superscript left of arrow */ 8913: == NULL ) goto end_of_job; } /* quit if failed */ 8914: if ( subsp != NULL ) /* cat subscript to right of arrow */ 8915: { int subht = (subsp->image)->height, /* subscript height */ 8916: deltab = (1+abs(height-subht))/2; /* baseline difference to center */ 8917: arrowsp->baseline = height-1; /* reset arrow baseline to bottom */ 8918: subsp->baseline = subht-1; /* force script baseline to bottom */ 8919: if ( subht <= height ) /* arrow usually taller than script*/ 8920: arrowsp->baseline -= deltab; /* so bottom of script goes here */ 8921: else subsp->baseline -= deltab; /* else bottom of arrow goes here */ 8922: if ( (arrowsp = rastcat(arrowsp,subsp,3)) /* subscript right of arrow */ 8923: == NULL ) goto end_of_job; } /* quit if failed */ 8924: /* --- return arrow (or NULL) to caller --- */ 8925: end_of_job: 8926: arrowsp->baseline = height-1; /* reset arrow baseline to bottom */ 8927: return ( arrowsp ); 8928: } /* --- end-of-function rastuparrow() --- */ 8929: 8930: 8931: /* ========================================================================== 8932: * Function: rastoverlay (expression, size, basesp, overlay, offset2, arg3) 8933: * Purpose: overlays one raster on another 8934: * -------------------------------------------------------------------------- 8935: * Arguments: expression (I/O) char ** to first char of null-terminated 8936: * string immediately following overlay \cmd to 8937: * be rasterized, and returning ptr immediately 8938: * following last character processed. 8939: * size (I) int containing 0-7 default font size 8940: * basesp (I) subraster * to character (or subexpression) 8941: * immediately preceding overlay \cmd 8942: * (unused, but passed for consistency) 8943: * overlay (I) int containing 1 to overlay / (e.g., \not) 8944: * or NOVALUE to pick up 2nd arg from expression 8945: * offset2 (I) int containing #pixels to horizontally offset 8946: * overlay relative to underlying symbol, 8947: * positive(right) or negative or 0, 8948: * or NOVALUE to pick up optional [offset] arg 8949: * arg3 (I) int unused 8950: * -------------------------------------------------------------------------- 8951: * Returns: ( subraster * ) ptr to subraster corresponding to composite, 8952: * or NULL for any parsing error 8953: * -------------------------------------------------------------------------- 8954: * Notes: o 8955: * ======================================================================= */ 8956: /* --- entry point --- */ 8957: subraster *rastoverlay ( char **expression, int size, subraster *basesp, 8958: int overlay, int offset2, int arg3 ) 8959: { 8960: /* ------------------------------------------------------------------------- 8961: Allocations and Declarations 8962: -------------------------------------------------------------------------- */ 8963: char *texsubexpr(), /*parse expression for base,overlay*/ 8964: expr1[512], expr2[512]; /* base, overlay */ 8965: subraster *rasterize(), *sp1=NULL, *sp2=NULL, /*rasterize 1=base, 2=overlay*/ 8966: *new_subraster(); /*explicitly alloc sp2 if necessary*/ 8967: subraster *rastcompose(), *overlaysp=NULL; /*subraster for composite overlay*/ 8968: int isalign = 0; /* true to align baselines */ 8969: int line_raster(); /* draw diagonal for \Not */ 8970: int evalterm(); /* evaluate [arg], {arg} */ 8971: /* ------------------------------------------------------------------------- 8972: Obtain base, and maybe overlay, and rasterize them 8973: -------------------------------------------------------------------------- */ 8974: /* --- check for optional offset2 arg --- */ 8975: if ( offset2 == NOVALUE ) /* only if not explicitly specified*/ 8976: if ( *(*expression) == '[' ) /*check for []-enclosed optional arg*/ 8977: { int offsetval; /* test before using it */ 8978: *expression = texsubexpr(*expression,expr2,511,"[","]",0,0); 8979: offsetval = /* convert [offset2] to int */ 8980: (int)(((double)evalterm(mimestore,expr2))+0.5); 8981: if ( abs(offsetval) <= 25 ) /* sanity check */ 8982: offset2 = offsetval; } /* replace deafault */ 8983: if ( offset2 == NOVALUE ) offset2 = 0; /* novalue means no offset */ 8984: /* --- parse for base, bump expression past it, and rasterize it --- */ 8985: *expression = texsubexpr(*expression,expr1,511,"{","}",0,0); 8986: if ( isempty(expr1) ) goto end_of_job; /* nothing to overlay, so quit */ 8987: rastlift1 = rastlift = 0; /* reset all raisebox() lifts */ 8988: if ( strstr(expr1,"\\raise") != NULL ) /* have a \raisebox */ 8989: isalign = 2; /* so align baselines */ 8990: if ( (sp1=rasterize(expr1,size)) /* rasterize base expression */ 8991: == NULL ) goto end_of_job; /* quit if failed to rasterize */ 8992: overlaysp = sp1; /*in case we return with no overlay*/ 8993: rastlift1 = rastlift; /* save lift for base expression */ 8994: /* --- get overlay expression, and rasterize it --- */ 8995: if ( overlay == NOVALUE ) /* get overlay from input stream */ 8996: { *expression = texsubexpr(*expression,expr2,511,"{","}",0,0); 8997: if ( !isempty(expr2) ) { /* have an overlay */ 8998: if ( strstr(expr2,"\\raise") != NULL ) /* have a \raisebox */ 8999: isalign = 2; /* so align baselines */ 9000: sp2 = rasterize(expr2,size); } } /* rasterize overlay expression */ 9001: else /* use specific built-in overlay */ 9002: switch ( overlay ) 9003: { 9004: default: break; 9005: case 1: /* e.g., \not overlays slash */ 9006: sp2 = rasterize("/",size+1); /* rasterize overlay expression */ 9007: isalign = 0; /* automatically handled correctly */ 9008: offset2 = max2(1,size-3); /* push / right a bit */ 9009: offset2 = 0; 9010: break; 9011: case 2: /* e.g., \Not draws diagonal */ 9012: sp2 = NULL; /* no overlay required */ 9013: isalign = 0; /* automatically handled correctly */ 9014: if ( overlaysp != NULL ) /* check that we have raster */ 9015: { raster *rp = overlaysp->image; /* raster to be \Not-ed */ 9016: int width=rp->width, height=rp->height; /* raster dimensions */ 9017: if ( 0 ) /* diagonal within bounding box */ 9018: line_raster(rp,0,width-1,height-1,0,1); /* just draw diagonal */ 9019: else /* construct "wide" diagonal */ 9020: { int margin=3; /* desired extra margin width */ 9021: sp2 = new_subraster(width+margin,height+margin,1); /*alloc it*/ 9022: if ( sp2 != NULL ) /* allocated successfully */ 9023: line_raster(sp2->image,0,width+margin-1,height+margin-1,0,1);}} 9024: break; 9025: case 3: /* e.g., \sout for strikeout */ 9026: sp2 = NULL; /* no overlay required */ 9027: if ( overlaysp != NULL ) /* check that we have raster */ 9028: { raster *rp = overlaysp->image; /* raster to be \sout-ed */ 9029: int width=rp->width, height=rp->height; /* raster dimensions */ 9030: int baseline = (overlaysp->baseline)-rastlift; /*skip descenders*/ 9031: int midrow = max2(0,min2(height-1,offset2+((baseline+1)/2))); 9032: if ( 1 ) /* strikeout within bounding box */ 9033: line_raster(rp,midrow,0,midrow,width-1,1); } /*draw strikeout*/ 9034: break; 9035: } /* --- end-of-switch(overlay) --- */ 9036: if ( sp2 == NULL ) goto end_of_job; /*return sp1 if failed to rasterize*/ 9037: /* ------------------------------------------------------------------------- 9038: construct composite overlay 9039: -------------------------------------------------------------------------- */ 9040: overlaysp = rastcompose(sp1,sp2,offset2,isalign,3); 9041: end_of_job: 9042: return ( overlaysp ); 9043: } /* --- end-of-function rastoverlay() --- */ 9044: 9045: 9046: /* ========================================================================== 9047: * Function: rastfrac ( expression, size, basesp, isfrac, arg2, arg3 ) 9048: * Purpose: \frac,\atop handler, returns a subraster corresponding to 9049: * expression (immediately following \frac,\atop) at font size 9050: * -------------------------------------------------------------------------- 9051: * Arguments: expression (I/O) char ** to first char of null-terminated 9052: * string immediately following \frac to be 9053: * rasterized, and returning ptr immediately 9054: * following last character processed. 9055: * size (I) int containing 0-7 default font size 9056: * basesp (I) subraster * to character (or subexpression) 9057: * immediately preceding \frac 9058: * (unused, but passed for consistency) 9059: * isfrac (I) int containing true to draw horizontal line 9060: * between numerator and denominator, 9061: * or false not to draw it (for \atop). 9062: * arg2 (I) int unused 9063: * arg3 (I) int unused 9064: * -------------------------------------------------------------------------- 9065: * Returns: ( subraster * ) ptr to subraster corresponding to fraction, 9066: * or NULL for any parsing error 9067: * -------------------------------------------------------------------------- 9068: * Notes: o 9069: * ======================================================================= */ 9070: /* --- entry point --- */ 9071: subraster *rastfrac ( char **expression, int size, subraster *basesp, 9072: int isfrac, int arg2, int arg3 ) 9073: { 9074: /* ------------------------------------------------------------------------- 9075: Allocations and Declarations 9076: -------------------------------------------------------------------------- */ 9077: char *texsubexpr(), /*parse expression for numer,denom*/ 9078: numer[MAXSUBXSZ+1], denom[MAXSUBXSZ+1]; /* parsed numer, denom */ 9079: subraster *rasterize(), *numsp=NULL, *densp=NULL; /*rasterize numer, denom*/ 9080: subraster *rastack(), *fracsp=NULL; /* subraster for numer/denom */ 9081: subraster *new_subraster()/*, *spacesp=NULL*/; /* space for num or den */ 9082: int width=0, /* width of constructed raster */ 9083: numheight=0; /* height of numerator */ 9084: int baseht=0, baseln=0; /* height,baseline of base symbol */ 9085: /*int istweak = 1;*/ /*true to tweak baseline alignment*/ 9086: int rule_raster(), /* draw horizontal line for frac */ 9087: lineheight = 1; /* thickness of fraction line */ 9088: int vspace = (size>2?2:1); /*vertical space between components*/ 9089: int delete_subraster(); /*free work areas in case of error*/ 9090: int type_raster(); /* display debugging output */ 9091: /* ------------------------------------------------------------------------- 9092: Obtain numerator and denominator, and rasterize them 9093: -------------------------------------------------------------------------- */ 9094: /* --- parse for numerator,denominator and bump expression past them --- */ 9095: *expression = texsubexpr(*expression,numer,0,"{","}",0,0); 9096: *expression = texsubexpr(*expression,denom,0,"{","}",0,0); 9097: if ( *numer=='\000' && *denom=='\000' ) /* missing both components of frac */ 9098: goto end_of_job; /* nothing to do, so quit */ 9099: /* --- rasterize numerator, denominator --- */ 9100: if ( *numer != '\000' ) /* have a numerator */ 9101: if ( (numsp = rasterize(numer,size-1)) /* so rasterize numer at size-1 */ 9102: == NULL ) goto end_of_job; /* and quit if failed */ 9103: if ( *denom != '\000' ) /* have a denominator */ 9104: if ( (densp = rasterize(denom,size-1)) /* so rasterize denom at size-1 */ 9105: == NULL ) /* failed */ 9106: { if ( numsp != NULL ) /* already rasterized numerator */ 9107: delete_subraster(numsp); /* so free now-unneeded numerator */ 9108: goto end_of_job; } /* and quit */ 9109: /* --- if one componenet missing, use a blank space for it --- */ 9110: if ( numsp == NULL ) /* no numerator given */ 9111: numsp = rasterize("[?]",size-1); /* missing numerator */ 9112: if ( densp == NULL ) /* no denominator given */ 9113: densp = rasterize("[?]",size-1); /* missing denominator */ 9114: /* --- check that we got both components --- */ 9115: if ( numsp==NULL || densp==NULL ) /* some problem */ 9116: { delete_subraster(numsp); /*delete numerator (if it existed)*/ 9117: delete_subraster(densp); /*delete denominator (if it existed)*/ 9118: goto end_of_job; } /* and quit */ 9119: /* --- get height of numerator (to determine where line belongs) --- */ 9120: numheight = (numsp->image)->height; /* get numerator's height */ 9121: /* ------------------------------------------------------------------------- 9122: construct raster with numerator stacked over denominator 9123: -------------------------------------------------------------------------- */ 9124: /* --- construct raster with numer/denom --- */ 9125: if ( (fracsp = rastack(densp,numsp,0,2*vspace+lineheight,1,3))/*numer/denom*/ 9126: == NULL ) /* failed to construct numer/denom */ 9127: { delete_subraster(numsp); /* so free now-unneeded numerator */ 9128: delete_subraster(densp); /* and now-unneeded denominator */ 9129: goto end_of_job; } /* and then quit */ 9130: /* --- determine width of constructed raster --- */ 9131: width = (fracsp->image)->width; /*just get width of embedded image*/ 9132: /* --- initialize subraster parameters --- */ 9133: fracsp->size = size; /* propagate font size forward */ 9134: fracsp->baseline = (numheight+vspace+lineheight)+(size+2);/*default baseline*/ 9135: fracsp->type = FRACRASTER; /* signal \frac image */ 9136: if ( basesp != (subraster *)NULL ) /* we have base symbol for frac */ 9137: { baseht = (basesp->image)->height; /* height of base symbol */ 9138: baseln = basesp->baseline; /* and its baseline */ 9139: } /* --- end-of-if(basesp!=NULL) --- */ 9140: /* ------------------------------------------------------------------------- 9141: draw horizontal line between numerator and denominator 9142: -------------------------------------------------------------------------- */ 9143: fraccenterline = numheight+vspace; /* signal that we have a \frac */ 9144: if ( isfrac ) /*line for \frac, but not for \atop*/ 9145: rule_raster(fracsp->image,fraccenterline,0,width,lineheight,0); 9146: /* ------------------------------------------------------------------------- 9147: return final result to caller 9148: -------------------------------------------------------------------------- */ 9149: end_of_job: 9150: if ( msgfp!=NULL && msglevel>=99 ) 9151: { fprintf(msgfp,"rastfrac> returning %s\n",(fracsp==NULL?"null":"...")); 9152: if ( fracsp != NULL ) /* have a constructed raster */ 9153: type_raster(fracsp->image,msgfp); } /* display constructed raster */ 9154: return ( fracsp ); 9155: } /* --- end-of-function rastfrac() --- */ 9156: 9157: 9158: /* ========================================================================== 9159: * Function: rastackrel ( expression, size, basesp, base, arg2, arg3 ) 9160: * Purpose: \stackrel handler, returns a subraster corresponding to 9161: * stacked relation 9162: * -------------------------------------------------------------------------- 9163: * Arguments: expression (I/O) char ** to first char of null-terminated 9164: * string immediately following \stackrel to be 9165: * rasterized, and returning ptr immediately 9166: * following last character processed. 9167: * size (I) int containing 0-7 default font size 9168: * basesp (I) subraster * to character (or subexpression) 9169: * immediately preceding \stackrel 9170: * (unused, but passed for consistency) 9171: * base (I) int containing 1 if upper/first subexpression 9172: * is base relation, or 2 if lower/second is 9173: * arg2 (I) int unused 9174: * arg3 (I) int unused 9175: * -------------------------------------------------------------------------- 9176: * Returns: ( subraster * ) ptr to subraster corresponding to stacked 9177: * relation, or NULL for any parsing error 9178: * -------------------------------------------------------------------------- 9179: * Notes: o 9180: * ======================================================================= */ 9181: /* --- entry point --- */ 9182: subraster *rastackrel ( char **expression, int size, subraster *basesp, 9183: int base, int arg2, int arg3 ) 9184: { 9185: /* ------------------------------------------------------------------------- 9186: Allocations and Declarations 9187: -------------------------------------------------------------------------- */ 9188: char *texsubexpr(), /*parse expression for upper,lower*/ 9189: upper[MAXSUBXSZ+1], lower[MAXSUBXSZ+1]; /* parsed upper, lower */ 9190: subraster *rasterize(), *upsp=NULL, *lowsp=NULL; /* rasterize upper, lower */ 9191: subraster *rastack(), *relsp=NULL; /* subraster for upper/lower */ 9192: int upsize = (base==1? size:size-1), /* font size for upper component */ 9193: lowsize = (base==2? size:size-1); /* font size for lower component */ 9194: int vspace = 1; /*vertical space between components*/ 9195: int delete_subraster(); /*free work areas in case of error*/ 9196: /* ------------------------------------------------------------------------- 9197: Obtain numerator and denominator, and rasterize them 9198: -------------------------------------------------------------------------- */ 9199: /* --- parse for numerator,denominator and bump expression past them --- */ 9200: *expression = texsubexpr(*expression,upper,0,"{","}",0,0); 9201: *expression = texsubexpr(*expression,lower,0,"{","}",0,0); 9202: if ( *upper=='\000' || *lower=='\000' ) /* missing either component */ 9203: goto end_of_job; /* nothing to do, so quit */ 9204: /* --- rasterize upper, lower --- */ 9205: if ( *upper != '\000' ) /* have upper component */ 9206: if ( (upsp = rasterize(upper,upsize)) /* so rasterize upper component */ 9207: == NULL ) goto end_of_job; /* and quit if failed */ 9208: if ( *lower != '\000' ) /* have lower component */ 9209: if ( (lowsp = rasterize(lower,lowsize)) /* so rasterize lower component */ 9210: == NULL ) /* failed */ 9211: { if ( upsp != NULL ) /* already rasterized upper */ 9212: delete_subraster(upsp); /* so free now-unneeded upper */ 9213: goto end_of_job; } /* and quit */ 9214: /* ------------------------------------------------------------------------- 9215: construct stacked relation raster 9216: -------------------------------------------------------------------------- */ 9217: /* --- construct stacked relation --- */ 9218: if ( (relsp = rastack(lowsp,upsp,3-base,vspace,1,3)) /* stacked relation */ 9219: == NULL ) goto end_of_job; /* quit if failed */ 9220: /* --- initialize subraster parameters --- */ 9221: relsp->size = size; /* propagate font size forward */ 9222: /* ------------------------------------------------------------------------- 9223: return final result to caller 9224: -------------------------------------------------------------------------- */ 9225: end_of_job: 9226: return ( relsp ); 9227: } /* --- end-of-function rastackrel() --- */ 9228: 9229: 9230: /* ========================================================================== 9231: * Function: rastmathfunc ( expression, size, basesp, base, arg2, arg3 ) 9232: * Purpose: \log, \lim, etc handler, returns a subraster corresponding 9233: * to math functions 9234: * -------------------------------------------------------------------------- 9235: * Arguments: expression (I/O) char ** to first char of null-terminated 9236: * string immediately following \mathfunc to be 9237: * rasterized, and returning ptr immediately 9238: * following last character processed. 9239: * size (I) int containing 0-7 default font size 9240: * basesp (I) subraster * to character (or subexpression) 9241: * immediately preceding \mathfunc 9242: * (unused, but passed for consistency) 9243: * mathfunc (I) int containing 1=arccos, 2=arcsin, etc. 9244: * islimits (I) int containing 1 if function may have 9245: * limits underneath, e.g., \lim_{n\to\infty} 9246: * arg3 (I) int unused 9247: * -------------------------------------------------------------------------- 9248: * Returns: ( subraster * ) ptr to subraster corresponding to mathfunc, 9249: * or NULL for any parsing error 9250: * -------------------------------------------------------------------------- 9251: * Notes: o 9252: * ======================================================================= */ 9253: /* --- entry point --- */ 9254: subraster *rastmathfunc ( char **expression, int size, subraster *basesp, 9255: int mathfunc, int islimits, int arg3 ) 9256: { 9257: /* ------------------------------------------------------------------------- 9258: Allocations and Declarations 9259: -------------------------------------------------------------------------- */ 9260: char *texscripts(), /* parse expression for _limits */ 9261: func[MAXTOKNSZ+1], limits[MAXSUBXSZ+1]; /*func as {\rm func}, limits*/ 9262: char *texsubexpr(), /* parse expression for arg */ 9263: funcarg[MAXTOKNSZ+1]; /* optional func arg */ 9264: subraster *rasterize(), *funcsp=NULL, *limsp=NULL; /*rasterize func,limits*/ 9265: subraster *rastack(), *mathfuncsp=NULL; /* subraster for mathfunc/limits */ 9266: int limsize = size-1; /* font size for limits */ 9267: int vspace = 1; /*vertical space between components*/ 9268: int delete_subraster(); /*free work areas in case of error*/ 9269: /* --- table of function names by mathfunc number --- */ 9270: static int numnames = 34; /* number of names in table */ 9271: static char *funcnames[] = { 9272: "error", /* 0 index is illegal/error bucket*/ 9273: "arccos", "arcsin", "arctan", /* 1 - 3 */ 9274: "arg", "cos", "cosh", /* 4 - 6 */ 9275: "cot", "coth", "csc", /* 7 - 9 */ 9276: "deg", "det", "dim", /* 10 - 12 */ 9277: "exp", "gcd", "hom", /* 13 - 15 */ 9278: "inf", "ker", "lg", /* 16 - 18 */ 9279: "lim", "liminf", "limsup", /* 19 - 21 */ 9280: "ln", "log", "max", /* 22 - 24 */ 9281: "min", "Pr", "sec", /* 25 - 27 */ 9282: "sin", "sinh", "sup", /* 28 - 30 */ 9283: "tan", "tanh", /* 31 - 32 */ 9284: /* --- extra mimetex funcnames --- */ 9285: "tr", /* 33 */ 9286: "pmod" /* 34 */ 9287: } ; 9288: /* ------------------------------------------------------------------------- 9289: set up and rasterize function name in \rm 9290: -------------------------------------------------------------------------- */ 9291: if ( mathfunc<0 || mathfunc>numnames ) mathfunc=0; /* check index bounds */ 9292: switch ( mathfunc ) /* check for special processing */ 9293: { 9294: default: /* no special processing */ 9295: strcpy(func,"{\\rm~"); /* init string with {\rm~ */ 9296: strcat(func,funcnames[mathfunc]); /* concat function name */ 9297: strcat(func,"}"); /* and add terminating } */ 9298: break; 9299: case 34: /* \pmod{x} --> (mod x) */ 9300: /* --- parse for \pmod{arg} argument --- */ 9301: *expression = texsubexpr(*expression,funcarg,2047,"{","}",0,0); 9302: strcpy(func,"{\${\\rm~mod}"); /* init with {\left({\rm~mod} */ 9303: strcat(func,"\\hspace2"); /* concat space */ 9304: strcat(func,funcarg); /* and \pmodargument */ 9305: strcat(func,"\$}"); /* and add terminating \right)} */ 9306: break; 9307: } /* --- end-of-switch(mathfunc) --- */ 9308: if ( (funcsp = rasterize(func,size)) /* rasterize function name */ 9309: == NULL ) goto end_of_job; /* and quit if failed */ 9310: mathfuncsp = funcsp; /* just return funcsp if no limits */ 9311: if ( !islimits ) goto end_of_job; /* treat any subscript normally */ 9312: /* ------------------------------------------------------------------------- 9313: Obtain limits, if permitted and if provided, and rasterize them 9314: -------------------------------------------------------------------------- */ 9315: /* --- parse for subscript limits, and bump expression past it(them) --- */ 9316: *expression = texscripts(*expression,limits,limits,1); 9317: if ( *limits=='\000') goto end_of_job; /* no limits, nothing to do, quit */ 9318: /* --- rasterize limits --- */ 9319: if ( (limsp = rasterize(limits,limsize)) /* rasterize limits */ 9320: == NULL ) goto end_of_job; /* and quit if failed */ 9321: /* ------------------------------------------------------------------------- 9322: construct func atop limits 9323: -------------------------------------------------------------------------- */ 9324: /* --- construct func atop limits --- */ 9325: if ( (mathfuncsp = rastack(limsp,funcsp,2,vspace,1,3)) /* func atop limits */ 9326: == NULL ) goto end_of_job; /* quit if failed */ 9327: /* --- initialize subraster parameters --- */ 9328: mathfuncsp->size = size; /* propagate font size forward */ 9329: /* ------------------------------------------------------------------------- 9330: return final result to caller 9331: -------------------------------------------------------------------------- */ 9332: end_of_job: 9333: return ( mathfuncsp ); 9334: } /* --- end-of-function rastmathfunc() --- */ 9335: 9336: 9337: /* ========================================================================== 9338: * Function: rastsqrt ( expression, size, basesp, arg1, arg2, arg3 ) 9339: * Purpose: \sqrt handler, returns a subraster corresponding to 9340: * expression (immediately following \sqrt) at font size 9341: * -------------------------------------------------------------------------- 9342: * Arguments: expression (I/O) char ** to first char of null-terminated 9343: * string immediately following \sqrt to be 9344: * rasterized, and returning ptr immediately 9345: * following last character processed. 9346: * size (I) int containing 0-7 default font size 9347: * basesp (I) subraster * to character (or subexpression) 9348: * immediately preceding \accent 9349: * (unused, but passed for consistency) 9350: * arg1 (I) int unused 9351: * arg2 (I) int unused 9352: * arg3 (I) int unused 9353: * -------------------------------------------------------------------------- 9354: * Returns: ( subraster * ) ptr to subraster corresponding to expression, 9355: * or NULL for any parsing error 9356: * (expression ptr unchanged if error occurs) 9357: * -------------------------------------------------------------------------- 9358: * Notes: o 9359: * ======================================================================= */ 9360: /* --- entry point --- */ 9361: subraster *rastsqrt ( char **expression, int size, subraster *basesp, 9362: int arg1, int arg2, int arg3 ) 9363: { 9364: /* ------------------------------------------------------------------------- 9365: Allocations and Declarations 9366: -------------------------------------------------------------------------- */ 9367: char *texsubexpr(), subexpr[MAXSUBXSZ+1], /*parse subexpr to be sqrt-ed*/ 9368: rootarg[MAXSUBXSZ+1]; /* optional \sqrt[rootarg]{...} */ 9369: subraster *rasterize(), *subsp=NULL; /* rasterize subexpr */ 9370: subraster *accent_subraster(), *sqrtsp=NULL, /* subraster with the sqrt */ 9371: *new_subraster(), *rootsp=NULL; /* optionally preceded by [rootarg]*/ 9372: int sqrtheight=0, sqrtwidth=0, surdwidth=0, /* height,width of sqrt */ 9373: rootheight=0, rootwidth=0, /* height,width of rootarg raster */ 9374: subheight=0, subwidth=0, pixsz=0; /* height,width,pixsz of subexpr */ 9375: int rastput(); /* put subexpr in constructed sqrt */ 9376: int overspace = 2; /*space between subexpr and overbar*/ 9377: int delete_subraster(); /* free work areas */ 9378: /* ------------------------------------------------------------------------- 9379: Obtain subexpression to be sqrt-ed, and rasterize it 9380: -------------------------------------------------------------------------- */ 9381: /* --- first check for optional \sqrt[rootarg]{...} --- */ 9382: if ( *(*expression) == '[' ) /*check for []-enclosed optional arg*/ 9383: { *expression = texsubexpr(*expression,rootarg,0,"[","]",0,0); 9384: if ( *rootarg != '\000' ) /* got rootarg */ 9385: if ( (rootsp=rasterize(rootarg,size-1)) /*rasterize it at smaller size*/ 9386: != NULL ) /* rasterized successfully */ 9387: { rootheight = (rootsp->image)->height; /* get height of rootarg */ 9388: rootwidth = (rootsp->image)->width; } /* and its width */ 9389: } /* --- end-of-if(**expression=='[') --- */ 9390: /* --- parse for subexpr to be sqrt-ed, and bump expression past it --- */ 9391: *expression = texsubexpr(*expression,subexpr,0,"{","}",0,0); 9392: if ( *subexpr == '\000' ) /* couldn't get subexpression */ 9393: goto end_of_job; /* nothing to do, so quit */ 9394: /* --- rasterize subexpression to be accented --- */ 9395: if ( (subsp = rasterize(subexpr,size)) /*rasterize subexpr at original size*/ 9396: == NULL ) goto end_of_job; /* quit if failed */ 9397: /* ------------------------------------------------------------------------- 9398: determine height and width of sqrt raster to be constructed 9399: -------------------------------------------------------------------------- */ 9400: /* --- first get height and width of subexpr --- */ 9401: subheight = (subsp->image)->height; /* height of subexpr */ 9402: subwidth = (subsp->image)->width; /* and its width */ 9403: pixsz = (subsp->image)->pixsz; /* pixsz remains constant */ 9404: /* --- determine height and width of sqrt to contain subexpr --- */ 9405: sqrtheight = subheight + overspace; /* subexpr + blank line + overbar */ 9406: surdwidth = SQRTWIDTH(sqrtheight,(rootheight<1?2:1)); /* width of surd */ 9407: sqrtwidth = subwidth + surdwidth + 1; /* total width */ 9408: /* ------------------------------------------------------------------------- 9409: construct sqrt (with room to move in subexpr) and embed subexpr in it 9410: -------------------------------------------------------------------------- */ 9411: /* --- construct sqrt --- */ 9412: if ( (sqrtsp=accent_subraster(SQRTACCENT, 9413: (rootheight<1?sqrtwidth:(-sqrtwidth)),sqrtheight,0,pixsz)) 9414: == NULL ) goto end_of_job; /* quit if failed to build sqrt */ 9415: /* --- embed subexpr in sqrt at lower-right corner--- */ 9416: rastput(sqrtsp->image,subsp->image,overspace,sqrtwidth-subwidth,1); 9417: sqrtsp->baseline = subsp->baseline + overspace; /* adjust baseline */ 9418: /* --- "embed" rootarg at upper-left --- */ 9419: if ( rootsp != NULL ) /*have optional \sqrt[rootarg]{...}*/ 9420: { 9421: /* --- allocate full raster to contain sqrtsp and rootsp --- */ 9422: int fullwidth = sqrtwidth +rootwidth - min2(rootwidth,max2(0,surdwidth-4)), 9423: fullheight= sqrtheight+rootheight- min2(rootheight,3+size); 9424: subraster *fullsp = new_subraster(fullwidth,fullheight,pixsz); 9425: if ( fullsp != NULL ) /* allocated successfully */ 9426: { /* --- embed sqrtsp exactly at lower-right corner --- */ 9427: rastput(fullsp->image,sqrtsp->image, /* exactly at lower-right corner*/ 9428: fullheight-sqrtheight,fullwidth-sqrtwidth,1); 9429: /* --- embed rootsp near upper-left, nestled above leading surd --- */ 9430: rastput(fullsp->image,rootsp->image, 9431: 0,max2(0,surdwidth-rootwidth-2-size),0); 9432: /* --- replace sqrtsp with fullsp --- */ 9433: delete_subraster(sqrtsp); /* free original sqrtsp */ 9434: sqrtsp = fullsp; /* and repoint it to fullsp instead*/ 9435: sqrtsp->baseline = fullheight - (subheight - subsp->baseline); } 9436: } /* --- end-of-if(rootsp!=NULL) --- */ 9437: /* --- initialize subraster parameters --- */ 9438: sqrtsp->size = size; /* propagate font size forward */ 9439: /* ------------------------------------------------------------------------- 9440: free unneeded component subrasters and return final result to caller 9441: -------------------------------------------------------------------------- */ 9442: end_of_job: 9443: if ( subsp != NULL ) delete_subraster(subsp); /* free unneeded subexpr */ 9444: return ( sqrtsp ); 9445: } /* --- end-of-function rastsqrt() --- */ 9446: 9447: 9448: /* ========================================================================== 9449: * Function: rastaccent (expression,size,basesp,accent,isabove,isscript) 9450: * Purpose: \hat, \vec, \etc handler, returns a subraster corresponding 9451: * to expression (immediately following \accent) at font size 9452: * -------------------------------------------------------------------------- 9453: * Arguments: expression (I/O) char ** to first char of null-terminated 9454: * string immediately following \accent to be 9455: * rasterized, and returning ptr immediately 9456: * following last character processed. 9457: * size (I) int containing 0-7 default font size 9458: * basesp (I) subraster * to character (or subexpression) 9459: * immediately preceding \accent 9460: * (unused, but passed for consistency) 9461: * accent (I) int containing HATACCENT or VECACCENT, etc, 9462: * between numerator and denominator, 9463: * or false not to draw it (for \over). 9464: * isabove (I) int containing true if accent is above 9465: * expression to be accented, or false 9466: * if accent is below (e.g., underbrace) 9467: * isscript (I) int containing true if sub/superscripts 9468: * allowed (for under/overbrace), or 0 if not. 9469: * -------------------------------------------------------------------------- 9470: * Returns: ( subraster * ) ptr to subraster corresponding to expression, 9471: * or NULL for any parsing error 9472: * (expression ptr unchanged if error occurs) 9473: * -------------------------------------------------------------------------- 9474: * Notes: o Also handles \overbrace{}^{} and \underbrace{}_{} by way 9475: * of isabove and isscript args. 9476: * ======================================================================= */ 9477: /* --- entry point --- */ 9478: subraster *rastaccent ( char **expression, int size, subraster *basesp, 9479: int accent, int isabove, int isscript ) 9480: { 9481: /* ------------------------------------------------------------------------- 9482: Allocations and Declarations 9483: -------------------------------------------------------------------------- */ 9484: char *texsubexpr(), subexpr[MAXSUBXSZ+1]; /*parse subexpr to be accented*/ 9485: char *texscripts(), *script=NULL, /* \under,overbrace allow scripts */ 9486: subscript[MAXTOKNSZ+1], supscript[MAXTOKNSZ+1]; /* parsed scripts */ 9487: subraster *rasterize(), *subsp=NULL, *scrsp=NULL; /*rasterize subexpr,script*/ 9488: subraster *rastack(), *accsubsp=NULL; /* stack accent, subexpr, script */ 9489: subraster *accent_subraster(), *accsp=NULL; /*raster for the accent itself*/ 9490: int accheight=0, accwidth=0, accdir=0,/*accent height, width, direction*/ 9491: subheight=0, subwidth=0, pixsz=0; /* height,width,pixsz of subexpr */ 9492: int delete_subraster(); /*free work areas in case of error*/ 9493: int vspace = 0; /*vertical space between accent,sub*/ 9494: /* ------------------------------------------------------------------------- 9495: Obtain subexpression to be accented, and rasterize it 9496: -------------------------------------------------------------------------- */ 9497: /* --- parse for subexpr to be accented, and bump expression past it --- */ 9498: *expression = texsubexpr(*expression,subexpr,0,"{","}",0,0); 9499: if ( *subexpr=='\000' ) /* couldn't get subexpression */ 9500: goto end_of_job; /* nothing to do, so quit */ 9501: /* --- rasterize subexpression to be accented --- */ 9502: if ( (subsp = rasterize(subexpr,size)) /*rasterize subexpr at original size*/ 9503: == NULL ) goto end_of_job; /* quit if failed */ 9504: /* ------------------------------------------------------------------------- 9505: determine desired accent width and height 9506: -------------------------------------------------------------------------- */ 9507: /* --- first get height and width of subexpr --- */ 9508: subheight = (subsp->image)->height; /* height of subexpr */ 9509: subwidth = (subsp->image)->width; /* and its width is overall width */ 9510: pixsz = (subsp->image)->pixsz; /* original pixsz remains constant */ 9511: /* --- determine desired width, height of accent --- */ 9512: accwidth = subwidth; /* same width as subexpr */ 9513: accheight = 4; /* default for bars */ 9514: switch ( accent ) 9515: { default: break; /* default okay */ 9516: case DOTACCENT: case DDOTACCENT: 9517: accheight = (size<4? 3:4); /* default for dots */ 9518: break; 9519: case VECACCENT: 9520: vspace = 1; /* set 1-pixel vertical space */ 9521: accdir = isscript; /* +1=right,-1=left,0=lr; +10for==>*/ 9522: isscript = 0; /* >>don't<< signal sub/supscript */ 9523: case HATACCENT: 9524: accheight = 7; /* default */ 9525: if ( subwidth < 10 ) accheight = 5; /* unless small width */ 9526: else if ( subwidth > 25 ) accheight = 9; /* or large */ 9527: break; 9528: } /* --- end-of-switch(accent) --- */ 9529: accheight = min2(accheight,subheight); /*never higher than accented subexpr*/ 9530: /* ------------------------------------------------------------------------- 9531: construct accent, and construct subraster with accent over (or under) subexpr 9532: -------------------------------------------------------------------------- */ 9533: /* --- first construct accent --- */ 9534: if ( (accsp = accent_subraster(accent,accwidth,accheight,accdir,pixsz)) 9535: == NULL ) goto end_of_job; /* quit if failed to build accent */ 9536: /* --- now stack accent above (or below) subexpr, and free both args --- */ 9537: accsubsp = (isabove? rastack(subsp,accsp,1,vspace,1,3)/*accent above subexpr*/ 9538: : rastack(accsp,subsp,2,vspace,1,3)); /*accent below subexpr*/ 9539: if ( accsubsp == NULL ) /* failed to stack accent */ 9540: { delete_subraster(subsp); /* free unneeded subsp */ 9541: delete_subraster(accsp); /* and unneeded accsp */ 9542: goto end_of_job; } /* and quit */ 9543: /* ------------------------------------------------------------------------- 9544: look for super/subscript (annotation for over/underbrace) 9545: -------------------------------------------------------------------------- */ 9546: /* --- first check whether accent permits accompanying annotations --- */ 9547: if ( !isscript ) goto end_of_job; /* no annotations for this accent */ 9548: /* --- now get scripts if there actually are any --- */ 9549: *expression = texscripts(*expression,subscript,supscript,(isabove?2:1)); 9550: script = (isabove? supscript : subscript); /*select above^ or below_ script*/ 9551: if ( *script == '\000' ) goto end_of_job; /* no accompanying script */ 9552: /* --- rasterize script annotation at size-2 --- */ 9553: if ( (scrsp = rasterize(script,size-2)) /* rasterize script at size-2 */ 9554: == NULL ) goto end_of_job; /* quit if failed */ 9555: /* --- stack annotation above (or below) accent, and free both args --- */ 9556: accsubsp = (isabove? rastack(accsubsp,scrsp,1,0,1,3) /* accent above base */ 9557: : rastack(scrsp,accsubsp,2,0,1,3)); /* accent below base */ 9558: /* ------------------------------------------------------------------------- 9559: return final result to caller 9560: -------------------------------------------------------------------------- */ 9561: end_of_job: 9562: if ( accsubsp != NULL ) /* initialize subraster parameters */ 9563: accsubsp->size = size; /* propagate font size forward */ 9564: return ( accsubsp ); 9565: } /* --- end-of-function rastaccent() --- */ 9566: 9567: 9568: /* ========================================================================== 9569: * Function: rastfont (expression,size,basesp,ifontnum,arg2,arg3) 9570: * Purpose: \cal{}, \scr{}, \etc handler, returns subraster corresponding 9571: * to char(s) within {}'s rendered at size 9572: * -------------------------------------------------------------------------- 9573: * Arguments: expression (I/O) char ** to first char of null-terminated 9574: * string immediately following \font to be 9575: * rasterized, and returning ptr immediately 9576: * following last character processed. 9577: * size (I) int containing 0-7 default font size 9578: * basesp (I) subraster * to character (or subexpression) 9579: * immediately preceding \accent 9580: * (unused, but passed for consistency) 9581: * ifontnum (I) int containing 1 for \cal{}, 2 for \scr{} 9582: * arg2 (I) int unused 9583: * arg3 (I) int unused 9584: * -------------------------------------------------------------------------- 9585: * Returns: ( subraster * ) ptr to subraster corresponding to chars 9586: * between {}'s, or NULL for any parsing error 9587: * -------------------------------------------------------------------------- 9588: * Notes: o 9589: * ======================================================================= */ 9590: /* --- entry point --- */ 9591: subraster *rastfont ( char **expression, int size, subraster *basesp, 9592: int ifontnum, int arg2, int arg3 ) 9593: { 9594: /* ------------------------------------------------------------------------- 9595: Allocations and Declarations 9596: -------------------------------------------------------------------------- */ 9597: char *texsubexpr(), fontchars[MAXSUBXSZ+1], /* chars to render in font */ 9598: subexpr[MAXSUBXSZ+1]; /* turn \cal{AB} into \calA\calB */ 9599: char *pfchars=fontchars, fchar='\0'; /* run thru fontchars one at a time*/ 9600: char *name = NULL; /* fontinfo[ifontnum].name */ 9601: int family = 0, /* fontinfo[ifontnum].family */ 9602: istext = 0, /* fontinfo[ifontnum].istext */ 9603: class = 0; /* fontinfo[ifontnum].class */ 9604: subraster *rasterize(), *fontsp=NULL, /* rasterize chars in font */ 9605: *rastflags(); /* or just set flag to switch font */ 9606: int oldsmashmargin = smashmargin; /* turn off smash in text mode */ 9607: #if 0 9608: /* --- fonts recognized by rastfont --- */ 9609: static int nfonts = 11; /* legal font #'s are 1...nfonts */ 9610: static struct {char *name; int class;} 9611: fonts[] = 9612: { /* --- name class 1=upper,2=alpha,3=alnum,4=lower,5=digit,9=all --- */ 9613: { "\\math", 0 }, 9614: { "\\mathcal", 1 }, /*(1) calligraphic, uppercase */ 9615: { "\\mathscr", 1 }, /*(2) rsfs/script, uppercase */ 9616: { "\\textrm", -1 }, /*(3) \rm,\text{abc} --> {\rm~abc} */ 9617: { "\\textit", -1 }, /*(4) \it,\textit{abc}-->{\it~abc} */ 9618: { "\\mathbb", -1 }, /*(5) \bb,\mathbb{abc}-->{\bb~abc} */ 9619: { "\\mathbf", -1 }, /*(6) \bf,\mathbf{abc}-->{\bf~abc} */ 9620: { "\\mathrm", -1 }, /*(7) \mathrm */ 9621: { "\\cyr", -1 }, /*(8) \cyr */ 9622: { "\\textgreek",-1 }, /*(9) \textgreek */ 9623: { "\\textbfgreek",CMMI10BGR,1,-1 },/*(10) \textbfgreek{ab} */ 9624: { "\\textbbgreek",BBOLD10GR,1,-1 },/*(11) \textbbgreek{ab} */ 9625: { NULL, 0 } 9626: } ; /* --- end-of-fonts[] --- */ 9627: #endif 9628: /* ------------------------------------------------------------------------- 9629: first get font name and class to determine type of conversion desired 9630: -------------------------------------------------------------------------- */ 9631: if (ifontnum<=0 || ifontnum>nfontinfo) ifontnum=0; /*math if out-of-bounds*/ 9632: name = fontinfo[ifontnum].name; /* font name */ 9633: family = fontinfo[ifontnum].family; /* font family */ 9634: istext = fontinfo[ifontnum].istext; /*true in text mode (respect space)*/ 9635: class = fontinfo[ifontnum].class; /* font class */ 9636: if ( istext ) /* text (respect blanks) */ 9637: { mathsmashmargin = smashmargin; /* needed for \text{if $n-m$ even} */ 9638: smashmargin = 0; } /* don't smash internal blanks */ 9639: /* ------------------------------------------------------------------------- 9640: now convert \font{abc} --> {\font~abc}, or convert ABC to \calA\calB\calC 9641: -------------------------------------------------------------------------- */ 9642: if ( 1 || class<0 ) /* not character-by-character */ 9643: { 9644: /* --- 9645: if \font not immediately followed by { then it has no arg, so just set flag 9646: ------------------------------------------------------------------------ */ 9647: if ( *(*expression) != '{' ) /* no \font arg, so just set flag */ 9648: { 9649: if ( msgfp!=NULL && msglevel>=99 ) 9650: fprintf(msgfp,"rastfont> \\%s rastflags() for font#%d\n",name,ifontnum); 9651: fontsp = rastflags(expression,size,basesp,ISFONTFAM,ifontnum,arg3); 9652: goto end_of_job; 9653: } /* --- end-of-if(*(*expression)!='{') --- */ 9654: /* --- 9655: convert \font{abc} --> {\font~abc} 9656: ---------------------------------- */ 9657: /* --- parse for {fontchars} arg, and bump expression past it --- */ 9658: *expression = texsubexpr(*expression,fontchars,0,"{","}",0,0); 9659: if ( msgfp!=NULL && msglevel>=99 ) 9660: fprintf(msgfp,"rastfont> \\%s fontchars=\"%s\"\n",name,fontchars); 9661: /* --- convert all fontchars at the same time --- */ 9662: strcpy(subexpr,"{"); /* start off with opening { */ 9663: strcat(subexpr,name); /* followed by font name */ 9664: strcat(subexpr,"~"); /* followed by whitespace */ 9665: strcat(subexpr,fontchars); /* followed by all the chars */ 9666: strcat(subexpr,"}"); /* terminate with closing } */ 9667: } /* --- end-of-if(class<0) --- */ 9668: else /* character-by-character */ 9669: { 9670: /* --- 9671: convert ABC to \calA\calB\calC 9672: ------------------------------ */ 9673: int isprevchar=0; /* true if prev char converted */ 9674: /* --- parse for {fontchars} arg, and bump expression past it --- */ 9675: *expression = texsubexpr(*expression,fontchars,0,"{","}",0,0); 9676: if ( msgfp!=NULL && msglevel>=99 ) 9677: fprintf(msgfp,"rastfont> \\%s fontchars=\"%s\"\n",name,fontchars); 9678: /* --- convert fontchars one at a time --- */ 9679: strcpy(subexpr,"{\\rm~"); /* start off with opening {\rm */ 9680: strcpy(subexpr,"{"); /* nope, just start off with { */ 9681: for ( pfchars=fontchars; (fchar= *pfchars)!='\000'; pfchars++ ) 9682: { 9683: if ( isthischar(fchar,WHITEMATH) ) /* some whitespace */ 9684: { if ( 0 || istext ) /* and we're in a text mode font */ 9685: strcat(subexpr,"\\;"); } /* so respect whitespace */ 9686: else /* char to be displayed in font */ 9687: { int exprlen = 0; /* #chars in subexpr before fchar */ 9688: int isinclass = 0; /* set true if fchar in font class */ 9689: /* --- class: 1=upper, 2=alpha, 3=alnum, 4=lower, 5=digit, 9=all --- */ 9690: switch ( class ) /* check if fchar is in font class */ 9691: { default: break; /* no chars in unrecognized class */ 9692: case 1: if ( isupper((int)fchar) ) isinclass=1; break; 9693: case 2: if ( isalpha((int)fchar) ) isinclass=1; break; 9694: case 3: if ( isalnum((int)fchar) ) isinclass=1; break; 9695: case 4: if ( islower((int)fchar) ) isinclass=1; break; 9696: case 5: if ( isdigit((int)fchar) ) isinclass=1; break; 9697: case 9: isinclass=1; break; } 9698: if ( isinclass ) /* convert current char to \font */ 9699: { strcat(subexpr,name); /* by prefixing it with font name */ 9700: isprevchar = 1; } /* and set flag to signal separator*/ 9701: else /* current char not in \font */ 9702: { if ( isprevchar ) /* extra separator only after \font*/ 9703: if ( isalpha(fchar) ) /* separator only before alpha */ 9704: strcat(subexpr,"~"); /* need separator after \font */ 9705: isprevchar = 0; } /* reset flag for next char */ 9706: exprlen = strlen(subexpr); /* #chars so far */ 9707: subexpr[exprlen] = fchar; /*fchar immediately after \fontname*/ 9708: subexpr[exprlen+1] = '\000'; } /* replace terminating '\0' */ 9709: } /* --- end-of-for(pfchars) --- */ 9710: strcat(subexpr,"}"); /* add closing } */ 9711: } /* --- end-of-if/else(class<0) --- */ 9712: /* ------------------------------------------------------------------------- 9713: rasterize subexpression containing chars to be rendered at font 9714: -------------------------------------------------------------------------- */ 9715: if ( msgfp!=NULL && msglevel>=99 ) 9716: fprintf(msgfp,"rastfont> subexpr=\"%s\"\n",subexpr); 9717: if ( (fontsp = rasterize(subexpr,size)) /* rasterize chars in font */ 9718: == NULL ) goto end_of_job; /* and quit if failed */ 9719: /* ------------------------------------------------------------------------- 9720: back to caller with chars rendered in font 9721: -------------------------------------------------------------------------- */ 9722: end_of_job: 9723: smashmargin = oldsmashmargin; /* restore smash */ 9724: mathsmashmargin = SMASHMARGIN; /* this one probably not necessary */ 9725: if ( istext && fontsp!=NULL ) /* raster contains text mode font */ 9726: fontsp->type = blanksignal; /* signal nosmash */ 9727: return ( fontsp ); /* chars rendered in font */ 9728: } /* --- end-of-function rastfont() --- */ 9729: 9730: 9731: /* ========================================================================== 9732: * Function: rastbegin ( expression, size, basesp, arg1, arg2, arg3 ) 9733: * Purpose: \begin{}...\end{} handler, returns a subraster corresponding 9734: * to array expression within environment, i.e., rewrites 9735: * \begin{}...\end{} as mimeTeX equivalent, and rasterizes that. 9736: * -------------------------------------------------------------------------- 9737: * Arguments: expression (I/O) char ** to first char of null-terminated 9738: * string immediately following \begin to be 9739: * rasterized, and returning ptr immediately 9740: * following last character processed. 9741: * size (I) int containing 0-7 default font size 9742: * basesp (I) subraster * to character (or subexpression) 9743: * immediately preceding \begin 9744: * (unused, but passed for consistency) 9745: * arg1 (I) int unused 9746: * arg2 (I) int unused 9747: * arg3 (I) int unused 9748: * -------------------------------------------------------------------------- 9749: * Returns: ( subraster * ) ptr to subraster corresponding to array 9750: * expression, or NULL for any parsing error 9751: * -------------------------------------------------------------------------- 9752: * Notes: o 9753: * ======================================================================= */ 9754: /* --- entry point --- */ 9755: subraster *rastbegin ( char **expression, int size, subraster *basesp, 9756: int arg1, int arg2, int arg3 ) 9757: { 9758: /* ------------------------------------------------------------------------- 9759: Allocations and Declarations 9760: -------------------------------------------------------------------------- */ 9761: char *texsubexpr(), subexpr[MAXSUBXSZ+1], /* \begin{} environment params*/ 9762: *exprptr=NULL,*begptr=NULL,*endptr=NULL,*braceptr=NULL; /* ptrs */ 9763: char *begtoken="\\begin{", *endtoken="\\end{"; /*tokens we're looking for*/ 9764: int strreplace(); /* replace substring in string */ 9765: char *strchange(); /*\begin...\end --> {\begin...\end}*/ 9766: char *delims = (char *)NULL; /* mdelims[ienviron] */ 9767: subraster *rasterize(), *sp=NULL; /* rasterize environment */ 9768: int ienviron = 0; /* environs[] index */ 9769: int nbegins = 0; /* #\begins nested beneath this one*/ 9770: int envlen=0, sublen=0; /* #chars in environ, subexpr */ 9771: static int blevel = 0; /* \begin...\end nesting level */ 9772: static char *mdelims[] = { NULL, NULL, NULL, NULL, 9773: "()","[]","{}","||","==", /* for pbBvVmatrix */ 9774: NULL, NULL, NULL, NULL, "{.", NULL, NULL, NULL, NULL, NULL, NULL, 9775: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }; 9776: static char *environs[] = { /* types of environments we process*/ 9777: "eqnarray", /* 0 eqnarray environment */ 9778: "array", /* 1 array environment */ 9779: "matrix", /* 2 array environment */ 9780: "tabular", /* 3 array environment */ 9781: "pmatrix", /* 4 ( ) */ 9782: "bmatrix", /* 5 [ ] */ 9783: "Bmatrix", /* 6 { } */ 9784: "vmatrix", /* 7 | | */ 9785: "Vmatrix", /* 8 || || */ 9786: "gather", /* 9 gather environment */ 9787: "align", /* 10 align environment */ 9788: "verbatim", /* 11 verbatim environment */ 9789: "picture", /* 12 picture environment */ 9790: "cases", /* 13 cases environment */ 9791: "equation", /* 14 for \begin{equation} */ 9792: NULL }; /* trailer */ 9793: /* ------------------------------------------------------------------------- 9794: determine type of environment we're beginning 9795: -------------------------------------------------------------------------- */ 9796: /* --- first bump nesting level --- */ 9797: blevel++; /* count \begin...\begin...'s */ 9798: /* --- \begin must be followed by {type_of_environment} --- */ 9799: exprptr = texsubexpr(*expression,subexpr,0,"{","}",0,0); 9800: if ( *subexpr == '\000' ) goto end_of_job; /* no environment given */ 9801: while ( (delims=strchr(subexpr,'*')) != NULL ) /* have environment* */ 9802: {strsqueeze(delims,1);} /* treat it as environment */ 9803: /* --- look up environment in our table --- */ 9804: for ( ienviron=0; ;ienviron++ ) /* search table till NULL */ 9805: if ( environs[ienviron] == NULL ) /* found NULL before match */ 9806: goto end_of_job; /* so quit */ 9807: else /* see if we have an exact match */ 9808: if ( memcmp(environs[ienviron],subexpr,strlen(subexpr)) == 0 ) /*match*/ 9809: break; /* leave loop with ienviron index */ 9810: /* --- accumulate any additional params for this environment --- */ 9811: *subexpr = '\000'; /* reset subexpr to empty string */ 9812: delims = mdelims[ienviron]; /* mdelims[] string for ienviron */ 9813: if ( delims != NULL ) /* add appropriate opening delim */ 9814: { strcpy(subexpr,"\\"); /* start with \ for (,[,{,|,= */ 9815: strcat(subexpr,delims); /* then add opening delim */ 9816: subexpr[2] = '\000'; } /* remove extraneous closing delim */ 9817: switch ( ienviron ) 9818: { 9819: default: goto end_of_job; /* environ not implemented yet */ 9820: case 0: /* \begin{eqnarray} */ 9821: strcpy(subexpr,"\\array{rcl$"); /* set default rcl for eqnarray */ 9822: break; 9823: case 1: case 2: case 3: /* \begin{array} followed by {lcr} */ 9824: strcpy(subexpr,"\\array{"); /*start with mimeTeX \array{ command*/ 9825: skipwhite(exprptr); /* bump to next non-white char */ 9826: if ( *exprptr == '{' ) /* assume we have {lcr} argument */ 9827: { exprptr = texsubexpr(exprptr,subexpr+7,0,"{","}",0,0); /*add on lcr*/ 9828: if ( *(subexpr+7) == '\000' ) goto end_of_job; /* quit if no lcr */ 9829: strcat(subexpr,"$"); } /* add terminating $ to lcr */ 9830: break; 9831: case 4: case 5: case 6: /* \begin{pmatrix} or b,B,v,Vmatrix */ 9832: case 7: case 8: 9833: strcat(subexpr,"\\array{"); /*start with mimeTeX \array{ command*/ 9834: break; 9835: case 9: /* gather */ 9836: strcat(subexpr,"\\array{c$"); /* center equations */ 9837: break; 9838: case 10: /* align */ 9839: strcat(subexpr,"\\array{rclrclrclrclrclrcl$"); /* a&=b & c&=d & etc */ 9840: break; 9841: case 11: /* verbatim */ 9842: strcat(subexpr,"{\\rm "); /* {\rm ...} */ 9843: /*strcat(subexpr,"\\\\{\\rm ");*/ /* \\{\rm } doesn't work in context */ 9844: break; 9845: case 12: /* picture */ 9846: strcat(subexpr,"\\picture"); /* picture environment */ 9847: skipwhite(exprptr); /* bump to next non-white char */ 9848: if ( *exprptr == '(' ) /*assume we have (width,height) arg*/ 9849: { exprptr = texsubexpr(exprptr,subexpr+8,0,"(",")",0,1); /*add on arg*/ 9850: if ( *(subexpr+8) == '\000' ) goto end_of_job; } /* quit if no arg */ 9851: strcat(subexpr,"{"); /* opening { after (width,height) */ 9852: break; 9853: case 13: /* cases */ 9854: strcat(subexpr,"\\array{ll$"); /* a&b \\ c&d etc */ 9855: break; 9856: case 14: /* \begin{equation} */ 9857: strcat(subexpr,"{"); /* just enclose expression in {}'s */ 9858: break; 9859: } /* --- end-of-switch(ienviron) --- */ 9860: /* ------------------------------------------------------------------------- 9861: locate matching \end{...} 9862: -------------------------------------------------------------------------- */ 9863: /* --- first \end following \begin --- */ 9864: if ( (endptr=strstr(exprptr,endtoken)) /* find 1st \end following \begin */ 9865: == NULL ) goto end_of_job; /* and quit if no \end found */ 9866: /* --- find matching endptr by pushing past any nested \begin's --- */ 9867: begptr = exprptr; /* start after first \begin{...} */ 9868: while ( 1 ) /*break when we find matching \end*/ 9869: { 9870: /* --- first, set ptr to closing } terminating current \end{...} --- */ 9871: if ( (braceptr=strchr(endptr+1,'}')) /* find 1st } following \end{ */ 9872: == NULL ) goto end_of_job; /* and quit if no } found */ 9873: /* -- locate next nested \begin --- */ 9874: if ( (begptr=strstr(begptr,begtoken)) /* find next \begin{...} */ 9875: == NULL ) break; /*no more, so we have matching \end*/ 9876: begptr += strlen(begtoken); /* push ptr past token */ 9877: if ( begptr >= endptr ) break; /* past endptr, so not nested */ 9878: /* --- have nested \begin, so push forward to next \end --- */ 9879: nbegins++; /* count another nested \begin */ 9880: if ( (endptr=strstr(endptr+strlen(endtoken),endtoken)) /* find next \end */ 9881: == NULL ) goto end_of_job; /* and quit if none found */ 9882: } /* --- end-of-while(1) --- */ 9883: /* --- push expression past closing } of \end{} --- */ 9884: *expression = braceptr+1; /* resume processing after } */ 9885: /* ------------------------------------------------------------------------- 9886: add on everything (i.e., the ...'s) between \begin{}[{}] ... \end{} 9887: -------------------------------------------------------------------------- */ 9888: /* --- add on everything, completing subexpr for \begin{}...\end{} --- */ 9889: sublen = strlen(subexpr); /* #chars in "preamble" */ 9890: envlen = (int)(endptr-exprptr); /* #chars between \begin{}{}...\end */ 9891: memcpy(subexpr+sublen,exprptr,envlen); /*concatanate environ after subexpr*/ 9892: subexpr[sublen+envlen] = '\000'; /* and null-terminate */ 9893: if ( 2 > 1 ) /* always... */ 9894: strcat(subexpr,"}"); /* ...followed by terminating } */ 9895: /* --- add terminating \right), etc, if necessary --- */ 9896: if ( delims != (char *)NULL ) /* need closing delim */ 9897: { strcat(subexpr,"\\"); /* start with \ for ),],},|,= */ 9898: strcat(subexpr,delims+1); } /* add appropriate closing delim */ 9899: /* ------------------------------------------------------------------------- 9900: change nested \begin...\end to {\begin...\end} so \array{} can handle them 9901: -------------------------------------------------------------------------- */ 9902: if ( nbegins > 0 ) /* have nested begins */ 9903: if ( blevel < 2 ) /* only need to do this once */ 9904: { 9905: begptr = subexpr; /* start at beginning of subexpr */ 9906: while( (begptr=strstr(begptr,begtoken)) != NULL ) /* have \begin{...} */ 9907: { strchange(0,begptr,"{"); /* \begin --> {\begin */ 9908: begptr += strlen(begtoken); } /* continue past {\begin */ 9909: endptr = subexpr; /* start at beginning of subexpr */ 9910: while( (endptr=strstr(endptr,endtoken)) != NULL ) /* have \end{...} */ 9911: if ( (braceptr=strchr(endptr+1,'}')) /* find 1st } following \end{ */ 9912: == NULL ) goto end_of_job; /* and quit if no } found */ 9913: else /* found terminating } */ 9914: { strchange(0,braceptr,"}"); /* \end{...} --> \end{...}} */ 9915: endptr = braceptr+1; } /* continue past \end{...} */ 9916: } /* --- end-of-if(nbegins>0) --- */ 9917: /* ------------------------------------------------------------------------- 9918: post process as necessary 9919: -------------------------------------------------------------------------- */ 9920: switch ( ienviron ) 9921: { 9922: default: break; /* no post-processing required */ 9923: case 10: /* align */ 9924: strreplace(subexpr,"&=","#*@*#=",0); /* tag all &='s */ 9925: strreplace(subexpr,"&<","#*@*#<",0); /* tag all &<'s */ 9926: strreplace(subexpr,"&\\lt","#*@*#<",0); /* tag all &\lt's */ 9927: strreplace(subexpr,"&\\leq","#*@*#\\leq",0); /* tag all &\leq's */ 9928: strreplace(subexpr,"&>","#*@*#>",0); /* tag all &>'s */ 9929: strreplace(subexpr,"&\\gt","#*@*#>",0); /* tag all &\gt's */ 9930: strreplace(subexpr,"&\\geq","#*@*#\\geq",0); /* tag all &\geq's */ 9931: if ( nbegins < 1 ) /* don't modify nested arrays */ 9932: strreplace(subexpr,"&","\\hspace{10}&\\hspace{10}",0); /* add space */ 9933: strreplace(subexpr,"#*@*#=","& = &",0); /*restore and xlate tagged &='s*/ 9934: strreplace(subexpr,"#*@*#<","& \\lt &",0); /*restore, xlate tagged &<'s*/ 9935: strreplace(subexpr,"#*@*#\\leq","& \\leq &",0); /*xlate tagged &\leq's*/ 9936: strreplace(subexpr,"#*@*#>","& \\gt &",0); /*restore, xlate tagged &>'s*/ 9937: strreplace(subexpr,"#*@*#\\geq","& \\geq &",0); /*xlate tagged &\geq's*/ 9938: break; 9939: case 11: /* verbatim */ 9940: strreplace(subexpr,"\n","\\\\",0); /* xlate \n newline to latex \\ */ 9941: /*strcat(subexpr,"\\\\");*/ /* add final latex \\ newline */ 9942: break; 9943: case 12: /* picture */ 9944: strreplace(subexpr,"\\put "," ",0); /*remove \put's (not really needed)*/ 9945: strreplace(subexpr,"\\put(","(",0); /*remove \put's (not really needed)*/ 9946: strreplace(subexpr,"\\oval","\\circle",0); /* actually an ellipse */ 9947: break; 9948: } /* --- end-of-switch(ienviron) --- */ 9949: /* ------------------------------------------------------------------------- 9950: return rasterized mimeTeX equivalent of \begin{}...\end{} environment 9951: -------------------------------------------------------------------------- */ 9952: /* --- debugging output --- */ 9953: if ( msgfp!=NULL && msglevel>=99 ) 9954: fprintf(msgfp,"rastbegin> subexpr=%s\n",subexpr); 9955: /* --- rasterize mimeTeX equivalent of \begin{}...\end{} environment --- */ 9956: sp = rasterize(subexpr,size); /* rasterize subexpr */ 9957: end_of_job: 9958: blevel--; /* decrement \begin nesting level */ 9959: return ( sp ); /* back to caller with sp or NULL */ 9960: } /* --- end-of-function rastbegin() --- */ 9961: 9962: 9963: /* ========================================================================== 9964: * Function: rastarray ( expression, size, basesp, arg1, arg2, arg3 ) 9965: * Purpose: \array handler, returns a subraster corresponding to array 9966: * expression (immediately following \array) at font size 9967: * -------------------------------------------------------------------------- 9968: * Arguments: expression (I/O) char ** to first char of null-terminated 9969: * string immediately following \array to be 9970: * rasterized, and returning ptr immediately 9971: * following last character processed. 9972: * size (I) int containing 0-7 default font size 9973: * basesp (I) subraster * to character (or subexpression) 9974: * immediately preceding \array 9975: * (unused, but passed for consistency) 9976: * arg1 (I) int unused 9977: * arg2 (I) int unused 9978: * arg3 (I) int unused 9979: * -------------------------------------------------------------------------- 9980: * Returns: ( subraster * ) ptr to subraster corresponding to array 9981: * expression, or NULL for any parsing error 9982: * -------------------------------------------------------------------------- 9983: * Notes: o Summary of syntax... 9984: * \array{3,lcrBC$a&b&c\\d&e&f\\etc} 9985: * o The 3,lcrBC$ part is an optional "preamble". The lcr means 9986: * what you think, i.e., "horizontal" left,center,right 9987: * justification down corresponding column. The new BC means 9988: * "vertical" baseline,center justification across corresponding 9989: * row. The leading 3 specifies the font size 0-4 to be used. 9990: * You may also specify +1,-1,+2,-2, etc, which is used as an 9991: * increment to the current font size, e.g., -1,lcr$ uses 9992: * one font size smaller than current. Without a leading 9993: * + or -, the font size is "absolute". 9994: * o The preamble can also be just lcrBC$ without a leading 9995: * size-part, or just 3$ without a trailing lcrBC-part. 9996: * The default size is whatever is current, and the 9997: * default justification is c(entered) and B(aseline). 9998: * ======================================================================= */ 9999: /* --- entry point --- */ 10000: subraster *rastarray ( char **expression, int size, subraster *basesp, 10001: int arg1, int arg2, int arg3 ) 10002: { 10003: /* ------------------------------------------------------------------------- 10004: Allocations and Declarations 10005: -------------------------------------------------------------------------- */ 10006: char *texsubexpr(), subexpr[MAXSUBXSZ+1], *exprptr, /*parse array subexpr*/ 10007: subtok[MAXTOKNSZ+1], *subptr=subtok, /* &,\\ inside { } not a delim*/ 10008: token[MAXTOKNSZ+1], *tokptr=token, /* subexpr token to rasterize */ 10009: *preamble(), *preptr=token; /*process optional size,lcr preamble*/ 10010: char *coldelim="&", *rowdelim="\\"; /* need escaped rowdelim */ 10011: int maxarraysz = 63; /* max #rows, cols */ 10012: int justify[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* -1,0,+1 = l,c,r */ 10013: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10014: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10015: hline[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* hline above row? */ 10016: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10017: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10018: vline[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /*vline left of col?*/ 10019: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10020: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10021: colwidth[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /*widest tokn in col*/ 10022: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10023: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10024: rowheight[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* "highest" in row */ 10025: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10026: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10027: fixcolsize[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /*1=fixed col width*/ 10028: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10029: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10030: fixrowsize[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /*1=fixed row height*/ 10031: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10032: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10033: rowbaseln[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* baseline for row */ 10034: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10035: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10036: vrowspace[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /*extra //[len]space*/ 10037: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10038: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10039: rowcenter[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /*true = vcenter row*/ 10040: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10041: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; 10042: static int /* --- propagate global values across arrays --- */ 10043: gjustify[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* -1,0,+1 = l,c,r */ 10044: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10045: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10046: gcolwidth[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /*widest tokn in col*/ 10047: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10048: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10049: growheight[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* "highest" in row */ 10050: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10051: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10052: gfixcolsize[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /*1=fixed col width*/ 10053: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10054: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10055: gfixrowsize[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /*1=fixed row height*/ 10056: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10057: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, 10058: growcenter[65]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /*true = vcenter row*/ 10059: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 10060: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; 10061: int rowglobal=0, colglobal=0, /* true to set global values */ 10062: rowpropagate=0, colpropagate=0; /* true if propagating values */ 10063: int irow,nrows=0, icol,ncols[65], /*#rows in array, #cols in each row*/ 10064: maxcols=0; /* max# cols in any single row */ 10065: int itoken, ntokens=0, /* index, total #tokens in array */ 10066: subtoklen=0, /* strlen of {...} subtoken */ 10067: istokwhite=1, /* true if token all whitespace */ 10068: nnonwhite=0; /* #non-white tokens */ 10069: int isescape=0,wasescape=0, /* current,prev chars escape? */ 10070: ischarescaped=0, /* is current char escaped? */ 10071: nescapes=0; /* #consecutive escapes */ 10072: subraster *rasterize(), *toksp[1025], /* rasterize tokens */ 10073: *new_subraster(), *arraysp=NULL; /* subraster for entire array */ 10074: raster *arrayrp=NULL; /* raster for entire array */ 10075: int delete_subraster(); /* free toksp[] workspace at eoj */ 10076: int rowspace=2, colspace=4, /* blank space between rows, cols */ 10077: hspace=1, vspace=1; /*space to accommodate hline,vline*/ 10078: int width=0, height=0, /* width,height of array */ 10079: leftcol=0, toprow=0; /*upper-left corner for cell in it*/ 10080: int rastput(); /* embed tokens/cells in array */ 10081: int rule_raster(); /* draw hlines and vlines in array */ 10082: char *hlchar="\\hline", *hdchar="\\hdash"; /* token signals hline */ 10083: char *texchar(), hltoken[1025]; /* extract \hline from token */ 10084: int ishonly=0, hltoklen, minhltoklen=3; /*flag, token must be \hl or \hd*/ 10085: int isnewrow=1; /* true for new row */ 10086: int pixsz = 1; /*default #bits per pixel, 1=bitmap*/ 10087: int evalterm(), evalue=0; /* evaluate [arg], {arg} */ 10088: static int mydaemonlevel = 0; /* check against global daemonlevel*/ 10089: /* ------------------------------------------------------------------------- 10090: Macros to determine extra raster space required for vline/hline 10091: -------------------------------------------------------------------------- */ 10092: #define vlinespace(icol) \ 10093: ( vline[icol] == 0? 0 : /* no vline so no space needed */ \ 10094: ( icol<1 || icol>=maxcols? vspace+(colspace+1)/2 : vspace ) ) 10095: #define hlinespace(irow) \ 10096: ( hline[irow] == 0? 0 : /* no hline so no space needed */ \ 10097: ( irow<1 || irow>=nrows? hspace+(rowspace+1)/2 : hspace ) ) 10098: /* ------------------------------------------------------------------------- 10099: Obtain array subexpression 10100: -------------------------------------------------------------------------- */ 10101: /* --- parse for array subexpression, and bump expression past it --- */ 10102: subexpr[1] = *subexpr = ' '; /* set two leading blanks */ 10103: *expression = texsubexpr(*expression,subexpr+2,0,"{","}",0,0); 10104: if ( msglevel>=29 && msgfp!=NULL ) /* debugging, display array */ 10105: fprintf(msgfp,"rastarray> %.256s\n",subexpr+2); 10106: if ( *(subexpr+2)=='\000' ) /* couldn't get subexpression */ 10107: goto end_of_job; /* nothing to do, so quit */ 10108: /* ------------------------------------------------------------------------- 10109: reset static arrays if main re-entered as daemon (or dll) 10110: -------------------------------------------------------------------------- */ 10111: if ( mydaemonlevel != daemonlevel ) { /* main re-entered */ 10112: for ( icol=0; icol<=maxarraysz; icol++ ) /* for each array[] index */ 10113: gjustify[icol] = gcolwidth[icol] = growheight[icol] = 10114: gfixcolsize[icol] = gfixrowsize[icol] = growcenter[icol] = 0; 10115: mydaemonlevel = daemonlevel; } /* update mydaemonlevel */ 10116: /* ------------------------------------------------------------------------- 10117: process optional size,lcr preamble if present 10118: -------------------------------------------------------------------------- */ 10119: /* --- reset size, get lcr's, and push exprptr past preamble --- */ 10120: exprptr = preamble(subexpr+2,&size,preptr); /* reset size and get lcr's */ 10121: /* --- init with global values --- */ 10122: for(icol=0; icol<=maxarraysz; icol++) { /* propagate global values... */ 10123: justify[icol] = gjustify[icol]; /* -1,0,+1 = l,c,r */ 10124: colwidth[icol] = gcolwidth[icol]; /* column width */ 10125: rowheight[icol] = growheight[icol]; /* row height */ 10126: fixcolsize[icol] = gfixcolsize[icol]; /* 1=fixed col width */ 10127: fixrowsize[icol] = gfixrowsize[icol]; /* 1=fixed row height */ 10128: rowcenter[icol] = growcenter[icol]; } /* true = vcenter row */ 10129: /* --- process lcr's, etc in preamble --- */ 10130: itoken = 0; /* debugging flag */ 10131: if ( msglevel>=29 && msgfp!=NULL ) /* debugging, display preamble */ 10132: if ( *preptr != '\000' ) /* if we have one */ 10133: fprintf(msgfp,"rastarray> preamble= \"%.256s\"\nrastarray> preamble: ", 10134: preptr); 10135: irow = icol = 0; /* init lcr counts */ 10136: while ( *preptr != '\000' ) /* check preamble text for lcr */ 10137: { 10138: char prepchar = *preptr; /* current preamble character */ 10139: int prepcase = (islower(prepchar)?1:(isupper(prepchar)?2:0)); /*1,2,or 0*/ 10140: if ( irow<maxarraysz && icol<maxarraysz ) 10141: switch ( /*tolower*/(prepchar) ) 10142: { default: break; /* just flush unrecognized chars */ 10143: case 'l': justify[icol] = (-1); /*left-justify this column*/ 10144: if (colglobal) gjustify[irow] = justify[irow]; break; 10145: case 'c': justify[icol] = (0); /* center this column */ 10146: if (colglobal) gjustify[irow] = justify[irow]; break; 10147: case 'r': justify[icol] = (+1); /* right-justify this col */ 10148: if (colglobal) gjustify[irow] = justify[irow]; break; 10149: case '|': vline[icol] += 1; break; /* solid vline left of col */ 10150: case '.': vline[icol] = (-1); break; /*dashed vline left of col */ 10151: case 'b': prepchar='B'; prepcase=2; /* alias for B */ 10152: case 'B': break; /* baseline-justify row */ 10153: case 'v': prepchar='C'; prepcase=2; /* alias for C */ 10154: case 'C': rowcenter[irow] = 1; /* vertically center row */ 10155: if (rowglobal) growcenter[irow] = rowcenter[irow]; break; 10156: case 'g': colglobal=1; prepcase=0; break; /* set global col values */ 10157: case 'G': rowglobal=1; prepcase=0; break; /* set global row values */ 10158: case '#': colglobal=rowglobal=1; break; } /* set global col,row vals */ 10159: if ( msglevel>=29 && msgfp!=NULL ) /* debugging */ 10160: fprintf(msgfp," %c[%d]",prepchar, 10161: (prepcase==1?icol+1:(prepcase==2?irow+1:0))); 10162: preptr++; /* check next char for lcr */ 10163: itoken++; /* #lcr's processed (debugging only)*/ 10164: /* --- check for number or +number specifying colwidth or rowheight --- */ 10165: if ( prepcase != 0 ) /* only check upper,lowercase */ 10166: { 10167: int ispropagate = (*preptr=='+'?1:0); /* leading + propagates width/ht */ 10168: if ( ispropagate ) { /* set row or col propagation */ 10169: if ( prepcase == 1 ) colpropagate = 1; /* propagating col values */ 10170: else if ( prepcase == 2 ) rowpropagate = 1; } /*propagating row values*/ 10171: if ( !colpropagate && prepcase == 1 ) 10172: { colwidth[icol] = 0; /* reset colwidth */ 10173: fixcolsize[icol] = 0; } /* reset width flag */ 10174: if ( !rowpropagate && prepcase == 2 ) 10175: { rowheight[irow] = 0; /* reset row height */ 10176: fixrowsize[irow] = 0; } /* reset height flag */ 10177: if ( ispropagate ) preptr++; /* bump past leading + */ 10178: if ( isdigit(*preptr) ) /* digit follows character */ 10179: { char *endptr = NULL; /* preptr set to 1st char after num*/ 10180: int size = (int)(strtol(preptr,&endptr,10)); /* interpret number */ 10181: char *whchars="?wh"; /* debugging width/height labels */ 10182: preptr = endptr; /* skip over all digits */ 10183: if ( size==0 || (size>=3&&size<=500) ) { /* sanity check */ 10184: int index; /* icol,irow...maxarraysz index */ 10185: if ( prepcase == 1 ) /* lowercase signifies colwidth */ 10186: for(index=icol; index<=maxarraysz; index++) { /*propagate col size*/ 10187: colwidth[index] = size; /* set colwidth to fixed size */ 10188: fixcolsize[index] = (size>0?1:0); /* set fixed width flag */ 10189: justify[index] = justify[icol]; /* and propagate justification */ 10190: if ( colglobal ) { /* set global values */ 10191: gcolwidth[index] = colwidth[index]; /* set global col width */ 10192: gfixcolsize[index] = fixcolsize[index]; /*set global width flag*/ 10193: gjustify[index] = justify[icol]; } /* set global col justify */ 10194: if ( !ispropagate ) break; } /* don't propagate */ 10195: else /* uppercase signifies rowheight */ 10196: for(index=irow; index<=maxarraysz; index++) { /*propagate row size*/ 10197: rowheight[index] = size; /* set rowheight to size */ 10198: fixrowsize[index] = (size>0?1:0); /* set fixed height flag */ 10199: rowcenter[index] = rowcenter[irow]; /* and propagate row center */ 10200: if ( rowglobal ) { /* set global values */ 10201: growheight[index] = rowheight[index]; /* set global row height */ 10202: gfixrowsize[index] = fixrowsize[index]; /*set global height flag*/ 10203: growcenter[index] = rowcenter[irow]; } /*set global row center*/ 10204: if ( !ispropagate ) break; } /* don't propagate */ 10205: } /* --- end-of-if(size>=3&&size<=500) --- */ 10206: if ( msglevel>=29 && msgfp!=NULL ) /* debugging */ 10207: fprintf(msgfp,":%c=%d/fix#%d",whchars[prepcase], 10208: (prepcase==1?colwidth[icol]:rowheight[irow]), 10209: (prepcase==1?fixcolsize[icol]:fixrowsize[irow])); 10210: } /* --- end-of-if(isdigit()) --- */ 10211: } /* --- end-of-if(prepcase!=0) --- */ 10212: if ( prepcase == 1 ) icol++; /* bump col if lowercase lcr */ 10213: else if ( prepcase == 2 ) irow++; /* bump row if uppercase BC */ 10214: } /* --- end-of-while(*preptr!='\000') --- */ 10215: if ( msglevel>=29 && msgfp!=NULL ) /* debugging, emit final newline */ 10216: if ( itoken > 0 ) /* if we have preamble */ 10217: fprintf(msgfp,"\n"); 10218: /* ------------------------------------------------------------------------- 10219: tokenize and rasterize components a & b \\ c & d \\ etc of subexpr 10220: -------------------------------------------------------------------------- */ 10221: /* --- rasterize tokens one at a time, and maintain row,col counts --- */ 10222: nrows = 0; /* start with top row */ 10223: ncols[nrows] = 0; /* no tokens/cols in top row yet */ 10224: while ( 1 ) /* scan chars till end */ 10225: { 10226: /* --- local control flags --- */ 10227: int iseox = (*exprptr == '\000'), /* null signals end-of-expression */ 10228: iseor = iseox, /* \\ or eox signals end-of-row */ 10229: iseoc = iseor; /* & or eor signals end-of-col */ 10230: /* --- check for escapes --- */ 10231: isescape = isthischar(*exprptr,ESCAPE); /* is current char escape? */ 10232: wasescape= (!isnewrow&&isthischar(*(exprptr-1),ESCAPE)); /*prev char esc?*/ 10233: nescapes = (wasescape?nescapes+1:0); /* # preceding consecutive escapes */ 10234: ischarescaped = (nescapes%2==0?0:1); /* is current char escaped? */ 10235: /* ----------------------------------------------------------------------- 10236: check for {...} subexpression starting from where we are now 10237: ------------------------------------------------------------------------ */ 10238: if ( *exprptr == '{' /* start of {...} subexpression */ 10239: && !ischarescaped ) /* if not escaped \{ */ 10240: { 10241: subptr = texsubexpr(exprptr,subtok,4095,"{","}",1,1); /*entire subexpr*/ 10242: subtoklen = strlen(subtok); /* #chars in {...} */ 10243: memcpy(tokptr,exprptr,subtoklen); /* copy {...} to accumulated token */ 10244: tokptr += subtoklen; /* bump tokptr to end of token */ 10245: exprptr += subtoklen; /* and bump exprptr past {...} */ 10246: istokwhite = 0; /* signal non-empty token */ 10247: continue; /* continue with char after {...} */ 10248: } /* --- end-of-if(*exprptr=='{') --- */ 10249: /* ----------------------------------------------------------------------- 10250: check for end-of-row(\\) and/or end-of-col(&) 10251: ------------------------------------------------------------------------ */ 10252: /* --- check for (escaped) end-of-row delimiter --- */ 10253: if ( isescape && !ischarescaped ) /* current char is escaped */ 10254: if ( isthischar(*(exprptr+1),rowdelim) /* next char is rowdelim */ 10255: || *(exprptr+1) == '\000' ) /* or a pathological null */ 10256: { iseor = 1; /* so set end-of-row flag */ 10257: wasescape=isescape=nescapes = 0; } /* reset flags for new row */ 10258: /* --- check for end-of-col delimiter --- */ 10259: if (iseor /* end-of-row signals end-of-col */ 10260: || (!ischarescaped&&isthischar(*exprptr,coldelim))) /*or unescaped coldel*/ 10261: iseoc = 1; /* so set end-of-col flag */ 10262: /* ----------------------------------------------------------------------- 10263: rasterize completed token 10264: ------------------------------------------------------------------------ */ 10265: if ( iseoc ) /* we have a completed token */ 10266: { 10267: *tokptr = '\000'; /* first, null-terminate token */ 10268: /* --- check first token in row for [len] and/or \hline or \hdash --- */ 10269: ishonly = 0; /*init for token not only an \hline*/ 10270: if ( ncols[nrows] == 0 ) /*\hline must be first token in row*/ 10271: { 10272: tokptr=token; skipwhite(tokptr); /* skip whitespace after // */ 10273: /* --- first check for optional [len] --- */ 10274: if ( *tokptr == '[' ) { /* have [len] if leading char is [ */ 10275: /* ---parse [len] and bump tokptr past it, interpret as double--- */ 10276: char lenexpr[128]; int len; /* chars between [...] as int */ 10277: tokptr = texsubexpr(tokptr,lenexpr,127,"[","]",0,0); 10278: if ( *lenexpr != '\000' ) { /* got [len] expression */ 10279: evalue = evalterm(mimestore,lenexpr); /* evaluate len expression */ 10280: len = iround(unitlength*((double)evalue)); /* len in pixels */ 10281: if ( len>=(-63) && len<=255 ) { /* sanity check */ 10282: vrowspace[nrows] = len; /* extra vspace before this row */ 10283: strsqueezep(token,tokptr); /* flush [len] from token */ 10284: tokptr=token; skipwhite(tokptr); } } /* reset ptr, skip white */ 10285: } /* --- end-of-if(*tokptr=='[') --- */ 10286: /* --- now check for \hline or \hdash --- */ 10287: tokptr = texchar(tokptr,hltoken); /* extract first char from token */ 10288: hltoklen = strlen(hltoken); /* length of first char */ 10289: if ( hltoklen >= minhltoklen ) { /*token must be at least \hl or \hd*/ 10290: if ( memcmp(hlchar,hltoken,hltoklen) == 0 ) /* we have an \hline */ 10291: hline[nrows] += 1; /* bump \hline count for row */ 10292: else if ( memcmp(hdchar,hltoken,hltoklen) == 0 ) /*we have an \hdash*/ 10293: hline[nrows] = (-1); } /* set \hdash flag for row */ 10294: if ( hline[nrows] != 0 ) /* \hline or \hdash prefixes token */ 10295: { skipwhite(tokptr); /* flush whitespace after \hline */ 10296: if ( *tokptr == '\000' /* end-of-expression after \hline */ 10297: || isthischar(*tokptr,coldelim) ) /* or unescaped coldelim */ 10298: { istokwhite = 1; /* so token contains \hline only */ 10299: if ( iseox ) ishonly = 1; } /* ignore entire row at eox */ 10300: else /* token contains more than \hline */ 10301: {strsqueezep(token,tokptr);} } /* so flush \hline */ 10302: } /* --- end-of-if(ncols[nrows]==0) --- */ 10303: /* --- rasterize completed token --- */ 10304: toksp[ntokens] = (istokwhite? NULL : /* don't rasterize empty token */ 10305: rasterize(token,size)); /* rasterize non-empty token */ 10306: if ( toksp[ntokens] != NULL ) /* have a rasterized token */ 10307: nnonwhite++; /* bump rasterized token count */ 10308: /* --- maintain colwidth[], rowheight[] max, and rowbaseln[] --- */ 10309: if ( toksp[ntokens] != NULL ) /* we have a rasterized token */ 10310: { 10311: /* --- update max token "height" in current row, and baseline --- */ 10312: int twidth = ((toksp[ntokens])->image)->width, /* width of token */ 10313: theight = ((toksp[ntokens])->image)->height, /* height of token */ 10314: tbaseln = (toksp[ntokens])->baseline, /* baseline of token */ 10315: rheight = rowheight[nrows], /* current max height for row */ 10316: rbaseln = rowbaseln[nrows]; /* current baseline for max height */ 10317: if ( 0 || fixrowsize[nrows]==0 ) /* rowheight not fixed */ 10318: rowheight[nrows] = /*max2( rheight,*/( /* current (max) rowheight */ 10319: max2(rbaseln+1,tbaseln+1) /* max height above baseline */ 10320: + max2(rheight-rbaseln-1,theight-tbaseln-1) ); /* plus max below */ 10321: rowbaseln[nrows] = max2(rbaseln,tbaseln); /*max space above baseline*/ 10322: /* --- update max token width in current column --- */ 10323: icol = ncols[nrows]; /* current column index */ 10324: if ( 0 || fixcolsize[icol]==0 ) /* colwidth not fixed */ 10325: colwidth[icol] = max2(colwidth[icol],twidth); /*widest token in col*/ 10326: } /* --- end-of-if(toksp[]!=NULL) --- */ 10327: /* --- bump counters --- */ 10328: if ( !ishonly ) /* don't count only an \hline */ 10329: if ( ncols[nrows] < maxarraysz ) /* don't overflow arrays */ 10330: { ntokens++; /* bump total token count */ 10331: ncols[nrows] += 1; } /* and bump #cols in current row */ 10332: /* --- get ready for next token --- */ 10333: tokptr = token; /* reset ptr for next token */ 10334: istokwhite = 1; /* next token starts all white */ 10335: } /* --- end-of-if(iseoc) --- */ 10336: /* ----------------------------------------------------------------------- 10337: bump row as necessary 10338: ------------------------------------------------------------------------ */ 10339: if ( iseor ) /* we have a completed row */ 10340: { 10341: maxcols = max2(maxcols,ncols[nrows]); /* max# cols in array */ 10342: if ( ncols[nrows]>0 || hline[nrows]==0 ) /*ignore row with only \hline*/ 10343: if ( nrows < maxarraysz ) /* don't overflow arrays */ 10344: nrows++; /* bump row count */ 10345: ncols[nrows] = 0; /* no cols in this row yet */ 10346: if ( !iseox ) /* don't have a null yet */ 10347: { exprptr++; /* bump past extra \ in \\ delim */ 10348: iseox = (*exprptr == '\000'); } /* recheck for pathological \null */ 10349: isnewrow = 1; /* signal start of new row */ 10350: } /* --- end-of-if(iseor) --- */ 10351: else 10352: isnewrow = 0; /* no longer first col of new row */ 10353: /* ----------------------------------------------------------------------- 10354: quit when done, or accumulate char in token and proceed to next char 10355: ------------------------------------------------------------------------ */ 10356: /* --- quit when done --- */ 10357: if ( iseox ) break; /* null terminator signalled done */ 10358: /* --- accumulate chars in token --- */ 10359: if ( !iseoc ) /* don't accumulate delimiters */ 10360: { *tokptr++ = *exprptr; /* accumulate non-delim char */ 10361: if ( !isthischar(*exprptr,WHITESPACE) ) /* this token isn't empty */ 10362: istokwhite = 0; } /* so reset flag to rasterize it */ 10363: /* --- ready for next char --- */ 10364: exprptr++; /* bump ptr */ 10365: } /* --- end-of-while(*exprptr!='\000') --- */ 10366: /* --- make sure we got something to do --- */ 10367: if ( nnonwhite < 1 ) /* completely empty array */ 10368: goto end_of_job; /* NULL back to caller */ 10369: /* ------------------------------------------------------------------------- 10370: determine dimensions of array raster and allocate it 10371: -------------------------------------------------------------------------- */ 10372: /* --- adjust colspace --- */ 10373: colspace = 2 + 2*size; /* temp kludge */ 10374: /* --- reset propagated sizes at boundaries of array --- */ 10375: colwidth[maxcols] = rowheight[nrows] = 0; /* reset explicit 0's at edges */ 10376: /* --- determine width of array raster --- */ 10377: width = colspace*(maxcols-1); /* empty space between cols */ 10378: if ( msglevel>=29 && msgfp!=NULL ) /* debugging */ 10379: fprintf(msgfp,"rastarray> %d cols, widths: ",maxcols); 10380: for ( icol=0; icol<=maxcols; icol++ ) /* and for each col */ 10381: { width += colwidth[icol]; /*width of this col (0 for maxcols)*/ 10382: width += vlinespace(icol); /*plus space for vline, if present*/ 10383: if ( msglevel>=29 && msgfp!=NULL ) /* debugging */ 10384: fprintf(msgfp," %d=%2d+%d",icol+1,colwidth[icol],(vlinespace(icol))); } 10385: /* --- determine height of array raster --- */ 10386: height = rowspace*(nrows-1); /* empty space between rows */ 10387: if ( msglevel>=29 && msgfp!=NULL ) /* debugging */ 10388: fprintf(msgfp,"\nrastarray> %d rows, heights: ",nrows); 10389: for ( irow=0; irow<=nrows; irow++ ) /* and for each row */ 10390: { height += rowheight[irow]; /*height of this row (0 for nrows)*/ 10391: height += vrowspace[irow]; /*plus extra //[len], if present*/ 10392: height += hlinespace(irow); /*plus space for hline, if present*/ 10393: if ( msglevel>=29 && msgfp!=NULL ) /* debugging */ 10394: fprintf(msgfp," %d=%2d+%d",irow+1,rowheight[irow],(hlinespace(irow))); } 10395: /* --- allocate subraster and raster for array --- */ 10396: if ( msglevel>=29 && msgfp!=NULL ) /* debugging */ 10397: fprintf(msgfp,"\nrastarray> tot width=%d(colspc=%d) height=%d(rowspc=%d)\n", 10398: width,colspace, height,rowspace); 10399: if ( (arraysp=new_subraster(width,height,pixsz)) /* allocate new subraster */ 10400: == NULL ) goto end_of_job; /* quit if failed */ 10401: /* --- initialize subraster parameters --- */ 10402: arraysp->type = IMAGERASTER; /* image */ 10403: arraysp->symdef = NULL; /* not applicable for image */ 10404: arraysp->baseline=min2(height/2+5,height-1); /*is a little above center good?*/ 10405: arraysp->size = size; /* size (probably unneeded) */ 10406: arrayrp = arraysp->image; /* raster embedded in subraster */ 10407: /* ------------------------------------------------------------------------- 10408: embed tokens/cells in array 10409: -------------------------------------------------------------------------- */ 10410: itoken = 0; /* start with first token */ 10411: toprow = 0; /* start at top row of array */ 10412: for ( irow=0; irow<=nrows; irow++ ) /*tokens were accumulated row-wise*/ 10413: { 10414: /* --- initialization for row --- */ 10415: int baseline = rowbaseln[irow]; /* baseline for this row */ 10416: if ( hline[irow] != 0 ) /* need hline above this row */ 10417: { int hrow = (irow<1? 0 : toprow - rowspace/2); /* row for hline */ 10418: if ( irow >= nrows ) hrow = height-1; /* row for bottom hline */ 10419: rule_raster(arrayrp,hrow,0,width,1,(hline[irow]<0?1:0)); } /* hline */ 10420: if ( irow >= nrows ) break; /*just needed \hline for irow=nrows*/ 10421: toprow += vrowspace[irow]; /* extra //[len] space above irow */ 10422: if ( toprow < 0 ) toprow = 0; /* check for large negative [-len] */ 10423: toprow += hlinespace(irow); /* space for hline above irow */ 10424: leftcol = 0; /* start at leftmost column */ 10425: for ( icol=0; icol<ncols[irow]; icol++ ) /* go through cells in this row */ 10426: { 10427: subraster *tsp = toksp[itoken]; /* token that belongs in this cell */ 10428: /* --- first adjust leftcol for vline to left of icol, if present ---- */ 10429: leftcol += vlinespace(icol); /* space for vline to left of col */ 10430: /* --- now rasterize cell ---- */ 10431: if ( tsp != NULL ) /* have a rasterized cell token */ 10432: { 10433: /* --- local parameters --- */ 10434: int cwidth = colwidth[icol], /* total column width */ 10435: twidth = (tsp->image)->width, /* token width */ 10436: theight= (tsp->image)->height, /* token height */ 10437: tokencol = 0, /*H offset (init for left justify)*/ 10438: tokenrow = baseline - tsp->baseline;/*V offset (init for baseline)*/ 10439: /* --- adjust leftcol for vline to left of icol, if present ---- */ 10440: /*leftcol += vlinespace(icol);*/ /* space for vline to left of col */ 10441: /* --- reset justification (if not left-justified) --- */ 10442: if ( justify[icol] == 0 ) /* but user wants it centered */ 10443: tokencol = (cwidth-twidth+1)/2; /* so split margin left/right */ 10444: else if ( justify[icol] == 1 ) /* or user wants right-justify */ 10445: tokencol = cwidth-twidth; /* so put entire margin at left */ 10446: /* --- reset vertical centering (if not baseline-aligned) --- */ 10447: if ( rowcenter[irow] ) /* center cells in row vertically */ 10448: tokenrow = (rowheight[irow]-theight)/2; /* center row */ 10449: /* --- embed token raster at appropriate place in array raster --- */ 10450: rastput(arrayrp,tsp->image, /* overlay cell token in array */ 10451: toprow+ tokenrow, /*with aligned baseline or centered*/ 10452: leftcol+tokencol, 1); /* and justified as requested */ 10453: } /* --- end-of-if(tsp!=NULL) --- */ 10454: itoken++; /* bump index for next cell */ 10455: leftcol += colwidth[icol] + colspace /*move leftcol right for next col*/ 10456: /* + vlinespace(icol) */ ; /*don't add space for vline to left of col*/ 10457: } /* --- end-of-for(icol) --- */ 10458: toprow += rowheight[irow] + rowspace; /* move toprow down for next row */ 10459: } /* --- end-of-for(irow) --- */ 10460: /* ------------------------------------------------------------------------- 10461: draw vlines as necessary 10462: -------------------------------------------------------------------------- */ 10463: leftcol = 0; /* start at leftmost column */ 10464: for ( icol=0; icol<=maxcols; icol++ ) /* check each col for a vline */ 10465: { 10466: if ( vline[icol] != 0 ) /* need vline to left of this col */ 10467: { int vcol = (icol<1? 0 : leftcol - colspace/2); /* column for vline */ 10468: if ( icol >= maxcols ) vcol = width-1; /*column for right edge vline*/ 10469: rule_raster(arrayrp,0,vcol,1,height,(vline[icol]<0?2:0)); } /* vline */ 10470: leftcol += vlinespace(icol); /* space for vline to left of col */ 10471: if ( icol < maxcols ) /* don't address past end of array */ 10472: leftcol += colwidth[icol] + colspace; /*move leftcol right for next col*/ 10473: } /* --- end-of-for(icol) --- */ 10474: /* ------------------------------------------------------------------------- 10475: free workspace and return final result to caller 10476: -------------------------------------------------------------------------- */ 10477: end_of_job: 10478: /* --- free workspace --- */ 10479: if ( ntokens > 0 ) /* if we have workspace to free */ 10480: while ( --ntokens >= 0 ) /* free each token subraster */ 10481: if ( toksp[ntokens] != NULL ) /* if we rasterized this cell */ 10482: delete_subraster(toksp[ntokens]); /* then free it */ 10483: /* --- return final result to caller --- */ 10484: return ( arraysp ); 10485: } /* --- end-of-function rastarray() --- */ 10486: 10487: 10488: /* ========================================================================== 10489: * Function: rastpicture ( expression, size, basesp, arg1, arg2, arg3 ) 10490: * Purpose: \picture handler, returns subraster corresponding to picture 10491: * expression (immediately following \picture) at font size 10492: * -------------------------------------------------------------------------- 10493: * Arguments: expression (I/O) char ** to first char of null-terminated 10494: * string immediately following \picture to be 10495: * rasterized, and returning ptr immediately 10496: * following last character processed. 10497: * size (I) int containing 0-7 default font size 10498: * basesp (I) subraster * to character (or subexpression) 10499: * immediately preceding \picture 10500: * (unused, but passed for consistency) 10501: * arg1 (I) int unused 10502: * arg2 (I) int unused 10503: * arg3 (I) int unused 10504: * -------------------------------------------------------------------------- 10505: * Returns: ( subraster * ) ptr to subraster corresponding to picture 10506: * expression, or NULL for any parsing error 10507: * -------------------------------------------------------------------------- 10508: * Notes: o Summary of syntax... 10509: * \picture(width,height){(x,y){pic_elem}~(x,y){pic_elem}~etc} 10510: * o 10511: * ======================================================================= */ 10512: /* --- entry point --- */ 10513: subraster *rastpicture ( char **expression, int size, subraster *basesp, 10514: int arg1, int arg2, int arg3 ) 10515: { 10516: /* ------------------------------------------------------------------------- 10517: Allocations and Declarations 10518: -------------------------------------------------------------------------- */ 10519: char *texsubexpr(), picexpr[2049], *picptr=picexpr, /* picture {expre} */ 10520: putexpr[256], *putptr,*multptr, /*[multi]put (x,y[;xinc,yinc;num])*/ 10521: pream[96], *preptr, /* optional put preamble */ 10522: picelem[1025]; /* picture element following put */ 10523: subraster *rasterize(), *picelemsp=NULL, /* rasterize picture elements */ 10524: *new_subraster(), *picturesp=NULL, /* subraster for entire picture */ 10525: *oldworkingbox = workingbox; /* save working box on entry */ 10526: raster *picturerp=NULL; /* raster for entire picture */ 10527: int delete_subraster(); /* free picelemsp[] workspace */ 10528: int pixsz = 1; /* pixels are one bit each */ 10529: double x=0.0,y=0.0, /* x,y-coords for put,multiput*/ 10530: xinc=0.0,yinc=0.0; /* x,y-incrementss for multiput*/ 10531: int width=0, height=0, /* #pixels width,height of picture */ 10532: ewidth=0, eheight=0, /* pic element width,height */ 10533: ix=0,xpos=0, iy=0,ypos=0, /* mimeTeX x,y pixel coords */ 10534: num=1, inum; /* number reps, index of element */ 10535: int evalterm(); /* evaluate [arg] and {arg}'s */ 10536: int iscenter=0; /* center or lowerleft put position*/ 10537: int *oldworkingparam = workingparam, /* save working param on entry */ 10538: origin = 0; /* x,yinc ++=00 +-=01 -+=10 --=11 */ 10539: int rastput(); /* embed elements in picture */ 10540: int type_raster(); /* display debugging output */ 10541: /* ------------------------------------------------------------------------- 10542: First obtain (width,height) arguments immediately following \picture command 10543: -------------------------------------------------------------------------- */ 10544: /* --- parse for (width,height) arguments, and bump expression past it --- */ 10545: *expression = texsubexpr(*expression,putexpr,254,"(",")",0,0); 10546: if ( *putexpr == '\000' ) goto end_of_job; /* couldn't get (width,height) */ 10547: /* --- now interpret width,height returned in putexpr --- */ 10548: if ( (putptr=strchr(putexpr,',')) != NULL ) /* look for ',' in width,height*/ 10549: *putptr = '\000'; /* found it, so replace ',' by '\0'*/ 10550: width=height = eround(putexpr); /*width pixels*/ 10551: if ( putptr != NULL ) /* 2nd arg, if present, is height */ 10552: height = eround(putptr+1); /*in pixels*/ 10553: /* ------------------------------------------------------------------------- 10554: Then obtain entire picture {...} subexpression following (width,height) 10555: -------------------------------------------------------------------------- */ 10556: /* --- parse for picture subexpression, and bump expression past it --- */ 10557: *expression = texsubexpr(*expression,picexpr,2047,"{","}",0,0); 10558: if ( *picexpr == '\000' ) goto end_of_job; /* couldn't get {pic_elements} */ 10559: /* ------------------------------------------------------------------------- 10560: allocate subraster and raster for complete picture 10561: -------------------------------------------------------------------------- */ 10562: /* --- sanity check on width,height args --- */ 10563: if ( width < 2 || width > 600 10564: || height < 2 || height > 600 ) goto end_of_job; 10565: /* --- allocate and initialize subraster for constructed picture --- */ 10566: if ( (picturesp=new_subraster(width,height,pixsz)) /*allocate new subraster*/ 10567: == NULL ) goto end_of_job; /* quit if failed */ 10568: workingbox = picturesp; /* set workingbox to our picture */ 10569: /* --- initialize picture subraster parameters --- */ 10570: picturesp->type = IMAGERASTER; /* image */ 10571: picturesp->symdef = NULL; /* not applicable for image */ 10572: picturesp->baseline = height/2 + 2; /* is a little above center good? */ 10573: picturesp->size = size; /* size (probably unneeded) */ 10574: picturerp = picturesp->image; /* raster embedded in subraster */ 10575: if ( msgfp!=NULL && msglevel>=29 ) /* debugging */ 10576: fprintf(msgfp,"picture> width,height=%d,%d\n",width,height); 10577: /* ------------------------------------------------------------------------- 10578: parse out each picture element, rasterize it, and place it in picture 10579: -------------------------------------------------------------------------- */ 10580: while ( *picptr != '\000' ) /* until we run out of pic_elems */ 10581: { 10582: /* ----------------------------------------------------------------------- 10583: first obtain leading \[multi]put(x,y[;xinc,yinc;num]) args for pic_elem 10584: ------------------------------------------------------------------------ */ 10585: /* --- init default values in case not explicitly supplied in args --- */ 10586: x=y=0.0; xinc=yinc=0.0; num=1; /* init default values */ 10587: iscenter = origin = 0; /* center, origin */ 10588: /* --- get (pream$x,y;xinc,yinc;num ) args and bump picptr past it --- */ 10589: while ( *picptr != '\000' ) /* skip invalid chars preceding ( */ 10590: if ( *picptr == '(' ) break; /* found opening ( */ 10591: else picptr++; /* else skip invalid char */ 10592: picptr = texsubexpr(picptr,putexpr,254,"(",")",0,0); 10593: if ( *putexpr == '\000' ) goto end_of_job; /* couldn't get (x,y) */ 10594: /* --- first look for $-terminated or for any non-digit preamble --- */ 10595: *pream = '\000'; /* init preamble as empty string */ 10596: if ( (putptr=strchr(putexpr,'$')) != NULL ) /*check for $ pream terminator*/ 10597: { *putptr++ = '\000'; /* replace $ by '\0', bump past $ */ 10598: strninit(pream,putexpr,92); } /* copy leading preamble from put */ 10599: else /* look for any non-digit preamble */ 10600: { int npream = 0; /* #chars in preamble */ 10601: for ( preptr=pream,putptr=putexpr; ; npream++,putptr++ ) 10602: if ( *putptr == '\000' /* end-of-putdata signalled */ 10603: || !isalpha((int)(*putptr)) /* or found non-alpha char */ 10604: || npream > 92 ) break; /* or preamble too long */ 10605: else *preptr++ = *putptr; /* copy alpha char to preamble */ 10606: *preptr = '\000'; } /* null-terminate preamble */ 10607: /* --- interpret preamble --- */ 10608: for ( preptr=pream; ; preptr++ ) /* examine each preamble char */ 10609: if ( *preptr == '\000' ) break; /* end-of-preamble signalled */ 10610: else switch ( tolower(*preptr) ) /* check lowercase preamble char */ 10611: { 10612: default: break; /* unrecognized flag */ 10613: case 'c': iscenter=1; break; /* center pic_elem at x,y coords */ 10614: } /* --- end-of-switch --- */ 10615: /* --- interpret x,y;xinc,yinc;num following preamble --- */ 10616: if ( *putptr != '\000' ) /*check for put data after preamble*/ 10617: { 10618: /* --- first squeeze preamble out of put expression --- */ 10619: if ( *pream != '\000' ) /* have preamble */ 10620: {strsqueezep(putexpr,putptr);} /* squeeze it out */ 10621: /* --- interpret x,y --- */ 10622: if ( (multptr=strchr(putexpr,';')) != NULL ) /*semicolon signals multiput*/ 10623: *multptr = '\000'; /* replace semicolon by '\0' */ 10624: if ( (putptr=strchr(putexpr,',')) != NULL ) /* comma separates x,y */ 10625: *putptr = '\000'; /* replace comma by '\0' */ 10626: if ( *putexpr != '\000' ) /* leading , may be placeholder */ 10627: x = (double)(eround(putexpr)); /* x coord in pixels*/ 10628: if ( putptr != NULL ) /* 2nd arg, if present, is y coord */ 10629: y = (double)(eround(putptr+1)); /* in pixels */ 10630: /* --- interpret xinc,yinc,num if we have a multiput --- */ 10631: if ( multptr != NULL ) /* found ';' signalling multiput */ 10632: { 10633: if ( (preptr=strchr(multptr+1,';')) != NULL ) /* ';' preceding num arg*/ 10634: *preptr = '\000'; /* replace ';' by '\0' */ 10635: if ( (putptr=strchr(multptr+1,',')) != NULL ) /* ',' between xinc,yinc*/ 10636: *putptr = '\000'; /* replace ',' by '\0' */ 10637: if ( *(multptr+1) != '\000' ) /* leading , may be placeholder */ 10638: xinc = (double)(eround(multptr+1)); /* xinc in pixels */ 10639: if ( putptr != NULL ) /* 2nd arg, if present, is yinc */ 10640: yinc = (double)(eround(putptr+1)); /* in user pixels */ 10641: num = (preptr==NULL? 999 : atoi(preptr+1)); /*explicit num val or 999*/ 10642: } /* --- end-of-if(multptr!=NULL) --- */ 10643: } /* --- end-of-if(*preptr!='\000') --- */ 10644: if ( msgfp!=NULL && msglevel>=29 ) /* debugging */ 10645: fprintf(msgfp, 10646: "picture> pream;x,y;xinc,yinc;num=\"%s\";%.2f,%.2f;%.2f,%.2f;%d\n", 10647: pream,x,y,xinc,yinc,num); 10648: /* ----------------------------------------------------------------------- 10649: now obtain {...} picture element following [multi]put, and rasterize it 10650: ------------------------------------------------------------------------ */ 10651: /* --- parse for {...} picture element and bump picptr past it --- */ 10652: picptr = texsubexpr(picptr,picelem,1023,"{","}",0,0); 10653: if ( *picelem == '\000' ) goto end_of_job; /* couldn't get {pic_elem} */ 10654: if ( msgfp!=NULL && msglevel>=29 ) /* debugging */ 10655: fprintf(msgfp, "picture> picelem=\"%.50s\"\n",picelem); 10656: /* --- rasterize picture element --- */ 10657: origin = 0; /* init origin as working param */ 10658: workingparam = &origin; /* and point working param to it */ 10659: picelemsp = rasterize(picelem,size); /* rasterize picture element */ 10660: if ( picelemsp == NULL ) continue; /* failed to rasterize, skip elem */ 10661: ewidth = (picelemsp->image)->width; /* width of element, in pixels */ 10662: eheight = (picelemsp->image)->height; /* height of element, in pixels */ 10663: if ( origin == 55 ) iscenter = 1; /* origin set to (.5,.5) for center*/ 10664: if ( msgfp!=NULL && msglevel>=29 ) /* debugging */ 10665: { fprintf(msgfp, "picture> ewidth,eheight,origin,num=%d,%d,%d,%d\n", 10666: ewidth,eheight,origin,num); 10667: if ( msglevel >= 999 ) type_raster(picelemsp->image,msgfp); } 10668: /* ----------------------------------------------------------------------- 10669: embed element in picture (once, or multiple times if requested) 10670: ------------------------------------------------------------------------ */ 10671: for ( inum=0; inum<num; inum++ ) /* once, or for num repetitions */ 10672: { 10673: /* --- set x,y-coords for this iteration --- */ 10674: ix = iround(x); iy = iround(y); /* round x,y to nearest integer */ 10675: if ( iscenter ) /* place center of element at x,y */ 10676: { xpos = ix - ewidth/2; /* x picture coord to center elem */ 10677: ypos = height - iy - eheight/2; } /* y pixel coord to center elem */ 10678: else /* default places lower-left at x,y*/ 10679: { xpos = ix; /* set x pixel coord for left */ 10680: if ( origin==10 || origin==11 ) /* x,yinc's are -+ or -- */ 10681: xpos = ix - ewidth; /* so set for right instead */ 10682: ypos = height - iy - eheight; /* set y pixel coord for lower */ 10683: if ( origin==1 || origin==11 ) /* x,yinc's are +- or -- */ 10684: ypos = height - iy; } /* so set for upper instead */ 10685: if ( msgfp!=NULL && msglevel>=29 ) /* debugging */ 10686: fprintf(msgfp, 10687: "picture> inum,x,y,ix,iy,xpos,ypos=%d,%.2f,%.2f,%d,%d,%d,%d\n", 10688: inum,x,y,ix,iy,xpos,ypos); 10689: /* --- embed token raster at xpos,ypos, and quit if out-of-bounds --- */ 10690: if ( !rastput(picturerp,picelemsp->image,ypos,xpos,0) ) break; 10691: /* --- apply increment --- */ 10692: if ( xinc==0. && yinc==0. ) break; /* quit if both increments zero */ 10693: x += xinc; y += yinc; /* increment coords for next iter */ 10694: } /* --- end-of-for(inum) --- */ 10695: /* --- free picture element subraster after embedding it in picture --- */ 10696: delete_subraster(picelemsp); /* done with subraster, so free it */ 10697: } /* --- end-of-while(*picptr!=0) --- */ 10698: /* ------------------------------------------------------------------------- 10699: return picture constructed from pic_elements to caller 10700: -------------------------------------------------------------------------- */ 10701: end_of_job: 10702: workingbox = oldworkingbox; /* restore original working box */ 10703: workingparam = oldworkingparam; /* restore original working param */ 10704: return ( picturesp ); /* return our picture to caller */ 10705: } /* --- end-of-function rastpicture() --- */ 10706: 10707: 10708: /* ========================================================================== 10709: * Function: rastline ( expression, size, basesp, arg1, arg2, arg3 ) 10710: * Purpose: \line handler, returns subraster corresponding to line 10711: * parameters (xinc,yinc){xlen} 10712: * -------------------------------------------------------------------------- 10713: * Arguments: expression (I/O) char ** to first char of null-terminated 10714: * string immediately following \line to be 10715: * rasterized, and returning ptr immediately 10716: * following last character processed. 10717: * size (I) int containing 0-7 default font size 10718: * basesp (I) subraster * to character (or subexpression) 10719: * immediately preceding \line 10720: * (unused, but passed for consistency) 10721: * arg1 (I) int unused 10722: * arg2 (I) int unused 10723: * arg3 (I) int unused 10724: * -------------------------------------------------------------------------- 10725: * Returns: ( subraster * ) ptr to subraster corresponding to line 10726: * requested, or NULL for any parsing error 10727: * -------------------------------------------------------------------------- 10728: * Notes: o Summary of syntax... 10729: * \line(xinc,yinc){xlen} 10730: * o if {xlen} not given, then it's assumed xlen = |xinc| 10731: * ======================================================================= */ 10732: /* --- entry point --- */ 10733: subraster *rastline ( char **expression, int size, subraster *basesp, 10734: int arg1, int arg2, int arg3 ) 10735: { 10736: /* ------------------------------------------------------------------------- 10737: Allocations and Declarations 10738: -------------------------------------------------------------------------- */ 10739: char *texsubexpr(),linexpr[257], *xptr=linexpr; /*line(xinc,yinc){xlen}*/ 10740: subraster *new_subraster(), *linesp=NULL; /* subraster for line */ 10741: /*char *origexpression = *expression;*/ /*original expression after \line*/ 10742: int pixsz = 1; /* pixels are one bit each */ 10743: int thickness = 1; /* line thickness */ 10744: double xinc=0.0, yinc=0.0, /* x,y-increments for line, */ 10745: xlen=0.0, ylen=0.0; /* x,y lengths for line */ 10746: int width=0, height=0, /* #pixels width,height of line */ 10747: rwidth=0, rheight=0; /*alloc width,height plus thickness*/ 10748: int evalterm(); /* evaluate [arg] and {arg}'s */ 10749: int istop=0, isright=0, /* origin at bot-left if x,yinc>=0 */ 10750: origin = 0; /* x,yinc: ++=00 +-=01 -+=10 --=11 */ 10751: int line_raster(); /* draw line in linesp->image */ 10752: /* ------------------------------------------------------------------------- 10753: obtain (xinc,yinc) arguments immediately following \line command 10754: -------------------------------------------------------------------------- */ 10755: /* --- parse for (xinc,yinc) arguments, and bump expression past it --- */ 10756: *expression = texsubexpr(*expression,linexpr,253,"(",")",0,0); 10757: if ( *linexpr == '\000' ) goto end_of_job; /* couldn't get (xinc,yinc) */ 10758: /* --- now interpret xinc,yinc;thickness returned in linexpr --- */ 10759: if ( (xptr=strchr(linexpr,';')) != NULL ) /* look for ';' after xinc,yinc */ 10760: { *xptr = '\000'; /* terminate linexpr at ; */ 10761: thickness = evalterm(mimestore,xptr+1); } /* get int thickness */ 10762: if ( (xptr=strchr(linexpr,',')) != NULL ) /* look for ',' in xinc,yinc */ 10763: *xptr = '\000'; /* found it, so replace ',' by '\0'*/ 10764: if ( *linexpr != '\000' ) /* check against missing 1st arg */ 10765: xinc = xlen = (double)evalterm(mimestore,linexpr); /* xinc in user units */ 10766: if ( xptr != NULL ) /* 2nd arg, if present, is yinc */ 10767: yinc = ylen = (double)evalterm(mimestore,xptr+1); /* in user units */ 10768: /* ------------------------------------------------------------------------- 10769: obtain optional {xlen} following (xinc,yinc), and calculate ylen 10770: -------------------------------------------------------------------------- */ 10771: /* --- check if {xlen} given --- */ 10772: if ( *(*expression) == '{' ) /*have {xlen} if leading char is { */ 10773: { 10774: /* --- parse {xlen} and bump expression past it, interpret as double --- */ 10775: *expression = texsubexpr(*expression,linexpr,253,"{","}",0,0); 10776: if ( *linexpr == '\000' ) goto end_of_job; /* couldn't get {xlen} */ 10777: xlen = (double)evalterm(mimestore,linexpr); /* xlen in user units */ 10778: /* --- set other values accordingly --- */ 10779: if ( xlen < 0.0 ) xinc = -xinc; /* if xlen negative, flip xinc sign*/ 10780: if ( xinc != 0.0 ) ylen = xlen*yinc/xinc; /* set ylen from xlen and slope*/ 10781: else xlen = 0.0; /* can't have xlen if xinc=0 */ 10782: } /* --- end-of-if(*(*expression)=='{') --- */ 10783: /* ------------------------------------------------------------------------- 10784: calculate width,height, etc, based on xlen,ylen, etc 10785: -------------------------------------------------------------------------- */ 10786: /* --- force lengths positive --- */ 10787: xlen = absval(xlen); /* force xlen positive */ 10788: ylen = absval(ylen); /* force ylen positive */ 10789: /* --- calculate corresponding lengths in pixels --- */ 10790: width = max2(1,iround(unitlength*xlen)); /*scale by unitlength and round,*/ 10791: height = max2(1,iround(unitlength*ylen)); /* and must be at least 1 pixel */ 10792: rwidth = width + (ylen<0.001?0:max2(0,thickness-1)); 10793: rheight = height + (xlen<0.001?0:max2(0,thickness-1)); 10794: /* --- set origin corner, x,yinc's: ++=0=(0,0) +-=1=(0,1) -+=10=(1,0) --- */ 10795: if ( xinc < 0.0 ) isright = 1; /*negative xinc, so corner is (1,?)*/ 10796: if ( yinc < 0.0 ) istop = 1; /*negative yinc, so corner is (?,1)*/ 10797: origin = isright*10 + istop; /* interpret 0=(0,0), 11=(1,1), etc*/ 10798: if ( msgfp!=NULL && msglevel>=29 ) /* debugging */ 10799: fprintf(msgfp,"rastline> width,height,origin;x,yinc=%d,%d,%d;%g,%g\n", 10800: width,height,origin,xinc,yinc); 10801: /* ------------------------------------------------------------------------- 10802: allocate subraster and raster for line 10803: -------------------------------------------------------------------------- */ 10804: /* --- sanity check on width,height,thickness args --- */ 10805: if ( width < 1 || width > 600 10806: || height < 1 || height > 600 10807: || thickness<1||thickness>25 ) goto end_of_job; 10808: /* --- allocate and initialize subraster for constructed line --- */ 10809: if ( (linesp=new_subraster(rwidth,rheight,pixsz)) /* alloc new subraster */ 10810: == NULL ) goto end_of_job; /* quit if failed */ 10811: /* --- initialize line subraster parameters --- */ 10812: linesp->type = IMAGERASTER; /* image */ 10813: linesp->symdef = NULL; /* not applicable for image */ 10814: linesp->baseline = height/2 + 2 /* is a little above center good? */ 10815: + (rheight-height)/2; /* account for line thickness too */ 10816: linesp->size = size; /* size (probably unneeded) */ 10817: /* ------------------------------------------------------------------------- 10818: draw the line 10819: -------------------------------------------------------------------------- */ 10820: line_raster ( linesp->image, /* embedded raster image */ 10821: (istop? 0 : height-1), /* row0, from bottom or top */ 10822: (isright? width-1 : 0), /* col0, from left or right */ 10823: (istop? height-1 : 0), /* row1, to top or bottom */ 10824: (isright? 0 : width-1), /* col1, to right or left */ 10825: thickness ); /* line thickness (usually 1 pixel)*/ 10826: /* ------------------------------------------------------------------------- 10827: return constructed line to caller 10828: -------------------------------------------------------------------------- */ 10829: end_of_job: 10830: if ( workingparam != NULL ) /* caller wants origin */ 10831: *workingparam = origin; /* return origin corner to caller */ 10832: return ( linesp ); /* return line to caller */ 10833: } /* --- end-of-function rastline() --- */ 10834: 10835: 10836: /* ========================================================================== 10837: * Function: rastrule ( expression, size, basesp, arg1, arg2, arg3 ) 10838: * Purpose: \rule handler, returns subraster corresponding to rule 10839: * parameters [lift]{width}{height} 10840: * -------------------------------------------------------------------------- 10841: * Arguments: expression (I/O) char ** to first char of null-terminated 10842: * string immediately following \rule to be 10843: * rasterized, and returning ptr immediately 10844: * following last character processed. 10845: * size (I) int containing 0-7 default font size 10846: * basesp (I) subraster * to character (or subexpression) 10847: * immediately preceding \rule 10848: * (unused, but passed for consistency) 10849: * arg1 (I) int unused 10850: * arg2 (I) int unused 10851: * arg3 (I) int unused 10852: * -------------------------------------------------------------------------- 10853: * Returns: ( subraster * ) ptr to subraster corresponding to rule 10854: * requested, or NULL for any parsing error 10855: * -------------------------------------------------------------------------- 10856: * Notes: o Summary of syntax... 10857: * \rule[lift]{width}{height} 10858: * o if [lift] not given, then bottom of rule on baseline 10859: * o if width=0 then you get an invisible strut 1 (one) pixel wide 10860: * ======================================================================= */ 10861: /* --- entry point --- */ 10862: subraster *rastrule ( char **expression, int size, subraster *basesp, 10863: int arg1, int arg2, int arg3 ) 10864: { 10865: /* ------------------------------------------------------------------------- 10866: Allocations and Declarations 10867: -------------------------------------------------------------------------- */ 10868: char *texsubexpr(), rulexpr[257]; /* rule[lift]{wdth}{hgt} */ 10869: subraster *new_subraster(), *rulesp=NULL; /* subraster for rule */ 10870: int pixsz = 1; /* pixels are one bit each */ 10871: int lift=0, width=0, height=0; /* default rule parameters */ 10872: double dval; /* convert ascii params to doubles */ 10873: int rwidth=0, rheight=0; /* alloc width, height plus lift */ 10874: int rule_raster(); /* draw rule in rulesp->image */ 10875: int evalterm(); /* evaluate args */ 10876: /* ------------------------------------------------------------------------- 10877: Obtain lift,width,height 10878: -------------------------------------------------------------------------- */ 10879: /* --- check for optional lift arg --- */ 10880: if ( *(*expression) == '[' ) /*check for []-enclosed optional arg*/ 10881: { *expression = texsubexpr(*expression,rulexpr,255,"[","]",0,0); 10882: dval = evalterm(mimestore,rulexpr); /* convert [lift] to int */ 10883: if ( dval <= 99 && dval >= (-99) ) /* sanity check */ 10884: lift = iround(unitlength*dval); } /* scale by unitlength and round */ 10885: /* --- parse for width --- */ 10886: *expression = texsubexpr(*expression,rulexpr,255,"{","}",0,0); 10887: if ( *rulexpr == '\000' ) goto end_of_job; /* quit if args missing */ 10888: dval = evalterm(mimestore,rulexpr); /* convert {width} to int */ 10889: if ( dval <= 500 && dval >= 0 ) /* sanity check */ 10890: width = max2(0,iround(unitlength*dval)); /* scale by unitlength and round*/ 10891: /* --- parse for height --- */ 10892: *expression = texsubexpr(*expression,rulexpr,255,"{","}",0,0); 10893: if ( *rulexpr == '\000' ) goto end_of_job; /* quit if args missing */ 10894: dval = evalterm(mimestore,rulexpr); /* convert {height} to int */ 10895: if ( dval <= 500 && dval > 0 ) /* sanity check */ 10896: height= max2(1,iround(unitlength*dval)); /* scale by unitlength and round*/ 10897: /* --- raster width,height in pixels --- */ 10898: rwidth = max2(1,width); /* raster must be at least 1 pixel*/ 10899: rheight = height + (lift>=0?lift: /* raster height plus lift */ 10900: (-lift<height?0:-lift-height+1)); /* may need empty space above rule */ 10901: /* ------------------------------------------------------------------------- 10902: allocate subraster and raster for rule 10903: -------------------------------------------------------------------------- */ 10904: /* --- sanity check on width,height,thickness args --- */ 10905: if ( rwidth < 1 || rwidth > 600 10906: || rheight < 1 || rheight > 600 ) goto end_of_job; 10907: /* --- allocate and initialize subraster for constructed rule --- */ 10908: if ( (rulesp=new_subraster(rwidth,rheight,pixsz)) /* alloc new subraster */ 10909: == NULL ) goto end_of_job; /* quit if failed */ 10910: /* --- initialize line subraster parameters --- */ 10911: rulesp->type = IMAGERASTER; /* image */ 10912: rulesp->symdef = NULL; /* not applicable for image */ 10913: rulesp->baseline = rheight-1 + (lift>=0?0:lift); /*adjust baseline for lift*/ 10914: rulesp->size = size; /* size (probably unneeded) */ 10915: /* ------------------------------------------------------------------------- 10916: draw the rule 10917: -------------------------------------------------------------------------- */ 10918: rule_raster ( rulesp->image, /* embedded raster image */ 10919: (-lift<height?0:rheight-height), /* topmost row for top-left corner*/ 10920: 0, /* leftmost col for top-left corner*/ 10921: width, /* rule width */ 10922: height, /* rule height */ 10923: ( width>0? 0:4 ) ); /* rule type */ 10924: /* ------------------------------------------------------------------------- 10925: return constructed rule to caller 10926: -------------------------------------------------------------------------- */ 10927: end_of_job: 10928: return ( rulesp ); /* return rule to caller */ 10929: } /* --- end-of-function rastrule() --- */ 10930: 10931: 10932: /* ========================================================================== 10933: * Function: rastcircle ( expression, size, basesp, arg1, arg2, arg3 ) 10934: * Purpose: \circle handler, returns subraster corresponding to ellipse 10935: * parameters (xdiam[,ydiam]) 10936: * -------------------------------------------------------------------------- 10937: * Arguments: expression (I/O) char ** to first char of null-terminated 10938: * string immediately following \circle to be 10939: * rasterized, and returning ptr immediately 10940: * following last character processed. 10941: * size (I) int containing 0-7 default font size 10942: * basesp (I) subraster * to character (or subexpression) 10943: * immediately preceding \circle 10944: * (unused, but passed for consistency) 10945: * arg1 (I) int unused 10946: * arg2 (I) int unused 10947: * arg3 (I) int unused 10948: * -------------------------------------------------------------------------- 10949: * Returns: ( subraster * ) ptr to subraster corresponding to ellipse 10950: * requested, or NULL for any parsing error 10951: * -------------------------------------------------------------------------- 10952: * Notes: o Summary of syntax... 10953: * \circle(xdiam[,ydiam]) 10954: * o 10955: * ======================================================================= */ 10956: /* --- entry point --- */ 10957: subraster *rastcircle ( char **expression, int size, subraster *basesp, 10958: int arg1, int arg2, int arg3 ) 10959: { 10960: /* ------------------------------------------------------------------------- 10961: Allocations and Declarations 10962: -------------------------------------------------------------------------- */ 10963: char *texsubexpr(), circexpr[512],*xptr=circexpr; /*circle(xdiam[,ydiam])*/ 10964: char *qptr=NULL, quads[256]="1234"; /* default to draw all quadrants */ 10965: double theta0=0.0, theta1=0.0; /* ;theta0,theta1 instead of ;quads*/ 10966: subraster *new_subraster(), *circsp=NULL; /* subraster for ellipse */ 10967: int pixsz = 1; /* pixels are one bit each */ 10968: double xdiam=0.0, ydiam=0.0; /* x,y major/minor axes/diameters */ 10969: int width=0, height=0; /* #pixels width,height of ellipse */ 10970: int thickness = 1; /* drawn lines are one pixel thick */ 10971: int evalterm(); /* evaluate [arg],{arg} expressions*/ 10972: int origin = 55; /* force origin centered */ 10973: int circle_raster(), /* draw ellipse in circsp->image */ 10974: circle_recurse(); /* for theta0,theta1 args */ 10975: /* ------------------------------------------------------------------------- 10976: obtain (xdiam[,ydiam]) arguments immediately following \circle command 10977: -------------------------------------------------------------------------- */ 10978: /* --- parse for (xdiam[,ydiam]) args, and bump expression past it --- */ 10979: *expression = texsubexpr(*expression,circexpr,500,"(",")",0,0); 10980: if ( *circexpr == '\000' ) goto end_of_job; /* couldn't get (xdiam[,ydiam])*/ 10981: /* --- now interpret xdiam[,ydiam] returned in circexpr --- */ 10982: if ( (qptr=strchr(circexpr,';')) != NULL ) /* semicolon signals quads data */ 10983: { *qptr = '\000'; /* replace semicolon by '\0' */ 10984: strninit(quads,qptr+1,128); /* save user-requested quads */ 10985: if ( (qptr=strchr(quads,',')) != NULL ) /* have theta0,theta1 instead */ 10986: { *qptr = '\000'; /* replace , with null */ 10987: theta0 = (double)evalterm(mimestore,quads); /* theta0 precedes , */ 10988: theta1 = (double)evalterm(mimestore,qptr+1); /* theta1 follows , */ 10989: qptr = NULL; } /* signal thetas instead of quads */ 10990: else 10991: qptr = quads; } /* set qptr arg for circle_raster()*/ 10992: else /* no ;quads at all */ 10993: qptr = quads; /* default to all 4 quadrants */ 10994: if ( (xptr=strchr(circexpr,',')) != NULL ) /* look for ',' in xdiam[,ydiam]*/ 10995: *xptr = '\000'; /* found it, so replace ',' by '\0'*/ 10996: xdiam = ydiam = /* xdiam=ydiam in user units */ 10997: (double)evalterm(mimestore,circexpr); /* evaluate expression */ 10998: if ( xptr != NULL ) /* 2nd arg, if present, is ydiam */ 10999: ydiam = (double)evalterm(mimestore,xptr+1); /* in user units */ 11000: /* ------------------------------------------------------------------------- 11001: calculate width,height, etc 11002: -------------------------------------------------------------------------- */ 11003: /* --- calculate width,height in pixels --- */ 11004: width = max2(1,iround(unitlength*xdiam)); /*scale by unitlength and round,*/ 11005: height = max2(1,iround(unitlength*ydiam)); /* and must be at least 1 pixel */ 11006: if ( msgfp!=NULL && msglevel>=29 ) /* debugging */ 11007: fprintf(msgfp,"rastcircle> width,height;quads=%d,%d,%s\n", 11008: width,height,(qptr==NULL?"default":qptr)); 11009: /* ------------------------------------------------------------------------- 11010: allocate subraster and raster for complete picture 11011: -------------------------------------------------------------------------- */ 11012: /* --- sanity check on width,height args --- */ 11013: if ( width < 1 || width > 600 11014: || height < 1 || height > 600 ) goto end_of_job; 11015: /* --- allocate and initialize subraster for constructed ellipse --- */ 11016: if ( (circsp=new_subraster(width,height,pixsz)) /* allocate new subraster */ 11017: == NULL ) goto end_of_job; /* quit if failed */ 11018: /* --- initialize ellipse subraster parameters --- */ 11019: circsp->type = IMAGERASTER; /* image */ 11020: circsp->symdef = NULL; /* not applicable for image */ 11021: circsp->baseline = height/2 + 2; /* is a little above center good? */ 11022: circsp->size = size; /* size (probably unneeded) */ 11023: /* ------------------------------------------------------------------------- 11024: draw the ellipse 11025: -------------------------------------------------------------------------- */ 11026: if ( qptr != NULL ) /* have quads */ 11027: circle_raster ( circsp->image, /* embedded raster image */ 11028: 0, 0, /* row0,col0 are upper-left corner */ 11029: height-1, width-1, /* row1,col1 are lower-right */ 11030: thickness, /* line thickness is 1 pixel */ 11031: qptr ); /* "1234" quadrants to be drawn */ 11032: else /* have theta0,theta1 */ 11033: circle_recurse ( circsp->image, /* embedded raster image */ 11034: 0, 0, /* row0,col0 are upper-left corner */ 11035: height-1, width-1, /* row1,col1 are lower-right */ 11036: thickness, /* line thickness is 1 pixel */ 11037: theta0,theta1 ); /* theta0,theta1 arc to be drawn */ 11038: /* ------------------------------------------------------------------------- 11039: return constructed ellipse to caller 11040: -------------------------------------------------------------------------- */ 11041: end_of_job: 11042: if ( workingparam != NULL ) /* caller wants origin */ 11043: *workingparam = origin; /* return center origin to caller */ 11044: return ( circsp ); /* return ellipse to caller */ 11045: } /* --- end-of-function rastcircle() --- */ 11046: 11047: 11048: /* ========================================================================== 11049: * Function: rastbezier ( expression, size, basesp, arg1, arg2, arg3 ) 11050: * Purpose: \bezier handler, returns subraster corresponding to bezier 11051: * parameters (col0,row0)(col1,row1)(colt,rowt) 11052: * -------------------------------------------------------------------------- 11053: * Arguments: expression (I/O) char ** to first char of null-terminated 11054: * string immediately following \bezier to be 11055: * rasterized, and returning ptr immediately 11056: * following last character processed. 11057: * size (I) int containing 0-7 default font size 11058: * basesp (I) subraster * to character (or subexpression) 11059: * immediately preceding \bezier 11060: * (unused, but passed for consistency) 11061: * arg1 (I) int unused 11062: * arg2 (I) int unused 11063: * arg3 (I) int unused 11064: * -------------------------------------------------------------------------- 11065: * Returns: ( subraster * ) ptr to subraster corresponding to bezier 11066: * requested, or NULL for any parsing error 11067: * -------------------------------------------------------------------------- 11068: * Notes: o Summary of syntax... 11069: * \bezier(col1,row1)(colt,rowt) 11070: * o col0=0,row0=0 assumed, i.e., given by 11071: * \picture(){~(col0,row0){\bezier(col1,row1)(colt,rowt)}~} 11072: * ======================================================================= */ 11073: /* --- entry point --- */ 11074: subraster *rastbezier ( char **expression, int size, subraster *basesp, 11075: int arg1, int arg2, int arg3 ) 11076: { 11077: /* ------------------------------------------------------------------------- 11078: Allocations and Declarations 11079: -------------------------------------------------------------------------- */ 11080: subraster *new_subraster(), *bezsp=NULL; /* subraster for bezier */ 11081: char *texsubexpr(), bezexpr[129],*xptr=bezexpr; /*\bezier(r,c)(r,c)(r,c)*/ 11082: double r0=0.0,c0=0.0, r1=0.0,c1=0.0, rt=0.0,ct=0.0, /* bezier points */ 11083: rmid=0.0, cmid=0.0, /* coords at parameterized midpoint*/ 11084: rmin=0.0, cmin=0.0, /* minimum r,c */ 11085: rmax=0.0, cmax=0.0, /* maximum r,c */ 11086: rdelta=0.0, cdelta=0.0, /* rmax-rmin, cmax-cmin */ 11087: r=0.0, c=0.0; /* some point */ 11088: int evalterm(); /* evaluate [arg],{arg} expressions*/ 11089: int iarg=0; /* 0=r0,c0 1=r1,c1 2=rt,ct */ 11090: int width=0, height=0; /* dimensions of bezier raster */ 11091: int pixsz = 1; /* pixels are one bit each */ 11092: /*int thickness = 1;*/ /* drawn lines are one pixel thick */ 11093: int origin = 0; /*c's,r's reset to lower-left origin*/ 11094: int bezier_raster(); /* draw bezier in bezsp->image */ 11095: /* ------------------------------------------------------------------------- 11096: obtain (c1,r1)(ct,rt) args immediately following \bezier command 11097: -------------------------------------------------------------------------- */ 11098: for ( iarg=1; iarg<=2; iarg++ ) /* 0=c0,r0 1=c1,r1 2=ct,rt */ 11099: { 11100: /* --- parse for (r,c) args, and bump expression past them all --- */ 11101: *expression = texsubexpr(*expression,bezexpr,127,"(",")",0,0); 11102: if ( *bezexpr == '\000' ) goto end_of_job; /* couldn't get (r,c)*/ 11103: /* --- now interpret (r,c) returned in bezexpr --- */ 11104: c = r = 0.0; /* init x-coord=col, y-coord=row */ 11105: if ( (xptr=strchr(bezexpr,',')) != NULL ) /* comma separates row,col */ 11106: { *xptr = '\000'; /* found it, so replace ',' by '\0'*/ 11107: /* --- row=y-coord in pixels --- */ 11108: r = unitlength*((double)evalterm(mimestore,xptr+1)); } 11109: /* --- col=x-coord in pixels --- */ 11110: c = unitlength*((double)evalterm(mimestore,bezexpr)); 11111: /* --- store r,c --- */ 11112: switch ( iarg ) 11113: { case 0: r0=r; c0=c; break; 11114: case 1: r1=r; c1=c; break; 11115: case 2: rt=r; ct=c; break; } 11116: } /* --- end-of-for(iarg) --- */ 11117: /* --- determine midpoint and maximum,minimum points --- */ 11118: rmid = 0.5*(rt + 0.5*(r0+r1)); /* y-coord at middle of bezier */ 11119: cmid = 0.5*(ct + 0.5*(c0+c1)); /* x-coord at middle of bezier */ 11120: rmin = min3(r0,r1,rmid); /* lowest row */ 11121: cmin = min3(c0,c1,cmid); /* leftmost col */ 11122: rmax = max3(r0,r1,rmid); /* highest row */ 11123: cmax = max3(c0,c1,cmid); /* rightmost col */ 11124: rdelta = rmax-rmin; /* height */ 11125: cdelta = cmax-cmin; /* width */ 11126: /* --- rescale coords so we start at 0,0 --- */ 11127: r0 -= rmin; c0 -= cmin; /* rescale r0,c0 */ 11128: r1 -= rmin; c1 -= cmin; /* rescale r1,c1 */ 11129: rt -= rmin; ct -= cmin; /* rescale rt,ct */ 11130: /* --- flip rows so 0,0 becomes lower-left corner instead of upper-left--- */ 11131: r0 = rdelta - r0 + 1; /* map 0-->height-1, height-1-->0 */ 11132: r1 = rdelta - r1 + 1; 11133: rt = rdelta - rt + 1; 11134: /* --- determine width,height of raster needed for bezier --- */ 11135: width = (int)(cdelta + 0.9999) + 1; /* round width up */ 11136: height = (int)(rdelta + 0.9999) + 1; /* round height up */ 11137: if ( msgfp!=NULL && msglevel>=29 ) /* debugging */ 11138: fprintf(msgfp,"rastbezier> width,height,origin=%d,%d,%d; c0,r0=%g,%g; " 11139: "c1,r1=%g,%g\n rmin,mid,max=%g,%g,%g; cmin,mid,max=%g,%g,%g\n", 11140: width,height,origin, c0,r0, c1,r1, rmin,rmid,rmax, cmin,cmid,cmax); 11141: /* ------------------------------------------------------------------------- 11142: allocate raster 11143: -------------------------------------------------------------------------- */ 11144: /* --- sanity check on width,height args --- */ 11145: if ( width < 1 || width > 600 11146: || height < 1 || height > 600 ) goto end_of_job; 11147: /* --- allocate and initialize subraster for constructed bezier --- */ 11148: if ( (bezsp=new_subraster(width,height,pixsz)) /* allocate new subraster */ 11149: == NULL ) goto end_of_job; /* quit if failed */ 11150: /* --- initialize bezier subraster parameters --- */ 11151: bezsp->type = IMAGERASTER; /* image */ 11152: bezsp->symdef = NULL; /* not applicable for image */ 11153: bezsp->baseline = height/2 + 2; /* is a little above center good? */ 11154: bezsp->size = size; /* size (probably unneeded) */ 11155: /* ------------------------------------------------------------------------- 11156: draw the bezier 11157: -------------------------------------------------------------------------- */ 11158: bezier_raster ( bezsp->image, /* embedded raster image */ 11159: r0, c0, /* row0,col0 are lower-left corner */ 11160: r1, c1, /* row1,col1 are upper-right */ 11161: rt, ct ); /* bezier tangent point */ 11162: /* ------------------------------------------------------------------------- 11163: return constructed bezier to caller 11164: -------------------------------------------------------------------------- */ 11165: end_of_job: 11166: if ( workingparam != NULL ) /* caller wants origin */ 11167: *workingparam = origin; /* return center origin to caller */ 11168: return ( bezsp ); /* return bezier to caller */ 11169: } /* --- end-of-function rastbezier() --- */ 11170: 11171: 11172: /* ========================================================================== 11173: * Function: rastraise ( expression, size, basesp, arg1, arg2, arg3 ) 11174: * Purpose: \raisebox{lift}{subexpression} handler, returns subraster 11175: * containing subexpression with its baseline "lifted" by lift 11176: * pixels, scaled by \unitlength, or "lowered" if lift arg 11177: * negative 11178: * -------------------------------------------------------------------------- 11179: * Arguments: expression (I/O) char ** to first char of null-terminated 11180: * string immediately following \raisebox to be 11181: * rasterized, and returning ptr immediately 11182: * following last character processed. 11183: * size (I) int containing 0-7 default font size 11184: * basesp (I) subraster * to character (or subexpression) 11185: * immediately preceding \raisebox 11186: * (unused, but passed for consistency) 11187: * arg1 (I) int unused 11188: * arg2 (I) int unused 11189: * arg3 (I) int unused 11190: * -------------------------------------------------------------------------- 11191: * Returns: ( subraster * ) ptr to subraster corresponding to \raisebox 11192: * requested, or NULL for any parsing error 11193: * -------------------------------------------------------------------------- 11194: * Notes: o Summary of syntax... 11195: * \raisebox{lift}{subexpression} 11196: * o 11197: * ======================================================================= */ 11198: /* --- entry point --- */ 11199: subraster *rastraise ( char **expression, int size, subraster *basesp, 11200: int arg1, int arg2, int arg3 ) 11201: { 11202: /* ------------------------------------------------------------------------- 11203: Allocations and Declarations 11204: -------------------------------------------------------------------------- */ 11205: char *texsubexpr(), subexpr[MAXSUBXSZ+1], *liftexpr=subexpr; /* args */ 11206: subraster *rasterize(), *raisesp=NULL; /* rasterize subexpr to be raised */ 11207: int lift=0; /* amount to raise/lower baseline */ 11208: int evalterm(); /* evaluate [arg],{arg} expressions*/ 11209: /* ------------------------------------------------------------------------- 11210: obtain {lift} argument immediately following \raisebox command 11211: -------------------------------------------------------------------------- */ 11212: rastlift = 0; /* reset global lift adjustment */ 11213: /* --- parse for {lift} arg, and bump expression past it --- */ 11214: *expression = texsubexpr(*expression,liftexpr,0,"{","}",0,0); 11215: if ( *liftexpr == '\000' ) goto end_of_job; /* couldn't get {lift} */ 11216: lift = eround(liftexpr); /* {lift} to integer */ 11217: if ( abs(lift) > 200 ) lift=0; /* sanity check */ 11218: /* ------------------------------------------------------------------------- 11219: obtain {subexpr} argument after {lift}, and rasterize it 11220: -------------------------------------------------------------------------- */ 11221: /* --- parse for {subexpr} arg, and bump expression past it --- */ 11222: *expression = texsubexpr(*expression,subexpr,0,"{","}",0,0); 11223: /* --- rasterize subexpression to be raised/lowered --- */ 11224: if ( (raisesp = rasterize(subexpr,size)) /* rasterize subexpression */ 11225: == NULL ) goto end_of_job; /* and quit if failed */ 11226: /* ------------------------------------------------------------------------- 11227: raise/lower baseline and return it to caller 11228: -------------------------------------------------------------------------- */ 11229: /* --- raise/lower baseline --- */ 11230: raisesp->baseline += lift; /* new baseline (no height checks) */ 11231: rastlift = lift; /* set global to signal adjustment */ 11232: /* --- return raised subexpr to caller --- */ 11233: end_of_job: 11234: return ( raisesp ); /* return raised subexpr to caller */ 11235: } /* --- end-of-function rastraise() --- */ 11236: 11237: 11238: /* ========================================================================== 11239: * Function: rastrotate ( expression, size, basesp, arg1, arg2, arg3 ) 11240: * Purpose: \rotatebox{degrees}{subexpression} handler, returns subraster 11241: * containing subexpression rotated by degrees (counterclockwise 11242: * if degrees positive) 11243: * -------------------------------------------------------------------------- 11244: * Arguments: expression (I/O) char ** to first char of null-terminated 11245: * string immediately following \rotatebox to be 11246: * rasterized, and returning ptr immediately 11247: * following last character processed. 11248: * size (I) int containing 0-7 default font size 11249: * basesp (I) subraster * to character (or subexpression) 11250: * immediately preceding \rotatebox 11251: * (unused, but passed for consistency) 11252: * arg1 (I) int unused 11253: * arg2 (I) int unused 11254: * arg3 (I) int unused 11255: * -------------------------------------------------------------------------- 11256: * Returns: ( subraster * ) ptr to subraster corresponding to \rotatebox 11257: * requested, or NULL for any parsing error 11258: * -------------------------------------------------------------------------- 11259: * Notes: o Summary of syntax... 11260: * \rotatebox{degrees}{subexpression} 11261: * o 11262: * ======================================================================= */ 11263: /* --- entry point --- */ 11264: subraster *rastrotate ( char **expression, int size, subraster *basesp, 11265: int arg1, int arg2, int arg3 ) 11266: { 11267: /* ------------------------------------------------------------------------- 11268: Allocations and Declarations 11269: -------------------------------------------------------------------------- */ 11270: char *texsubexpr(), subexpr[MAXSUBXSZ+1], *degexpr=subexpr; /* args */ 11271: subraster *rasterize(), *rotsp=NULL; /* subraster for rotated subexpr */ 11272: raster *rastrot(), *rotrp=NULL; /* rotate subraster->image 90 degs */ 11273: int delete_raster(); /* delete intermediate rasters */ 11274: int baseline=0; /* baseline of rasterized image */ 11275: double degrees=0.0, ipart,fpart; /* degrees to be rotated */ 11276: int idegrees=0, isneg=0; /* positive ipart, isneg=1 if neg */ 11277: int n90=0, isn90=1; /* degrees is n90 multiples of 90 */ 11278: int evalterm(); /* evaluate [arg],{arg} expressions*/ 11279: /* ------------------------------------------------------------------------- 11280: obtain {degrees} argument immediately following \rotatebox command 11281: -------------------------------------------------------------------------- */ 11282: /* --- parse for {degrees} arg, and bump expression past it --- */ 11283: *expression = texsubexpr(*expression,degexpr,0,"{","}",0,0); 11284: if ( *degexpr == '\000' ) goto end_of_job; /* couldn't get {degrees} */ 11285: degrees = (double)evalterm(mimestore,degexpr); /* degrees to be rotated */ 11286: if ( degrees < 0.0 ) /* clockwise rotation desired */ 11287: { degrees = -degrees; /* flip sign so degrees positive */ 11288: isneg = 1; } /* and set flag to indicate flip */ 11289: fpart = modf(degrees,&ipart); /* integer and fractional parts */ 11290: ipart = (double)(((int)degrees)%360); /* degrees mod 360 */ 11291: degrees = ipart + fpart; /* restore fractional part */ 11292: if ( isneg ) /* if clockwise rotation requested */ 11293: degrees = 360.0 - degrees; /* do equivalent counterclockwise */ 11294: idegrees = (int)(degrees+0.5); /* integer degrees */ 11295: n90 = idegrees/90; /* degrees is n90 multiples of 90 */ 11296: isn90 = (90*n90==idegrees); /*true if degrees is multiple of 90*/ 11297: isn90 = 1; /* forced true for time being */ 11298: /* ------------------------------------------------------------------------- 11299: obtain {subexpr} argument after {degrees}, and rasterize it 11300: -------------------------------------------------------------------------- */ 11301: /* --- parse for {subexpr} arg, and bump expression past it --- */ 11302: *expression = texsubexpr(*expression,subexpr,0,"{","}",0,0); 11303: /* --- rasterize subexpression to be rotated --- */ 11304: if ( (rotsp = rasterize(subexpr,size)) /* rasterize subexpression */ 11305: == NULL ) goto end_of_job; /* and quit if failed */ 11306: /* --- return unmodified image if no rotation requested --- */ 11307: if ( abs(idegrees) < 2 ) goto end_of_job; /* don't bother rotating image */ 11308: /* --- extract params for image to be rotated --- */ 11309: rotrp = rotsp->image; /* unrotated rasterized image */ 11310: baseline = rotsp->baseline; /* and baseline of that image */ 11311: /* ------------------------------------------------------------------------- 11312: rotate by multiples of 90 degrees 11313: -------------------------------------------------------------------------- */ 11314: if ( isn90 ) /* rotation by multiples of 90 */ 11315: if ( n90 > 0 ) /* do nothing for 0 degrees */ 11316: { 11317: n90 = 4-n90; /* rasrot() rotates clockwise */ 11318: while ( n90 > 0 ) /* still have remaining rotations */ 11319: { raster *nextrp = rastrot(rotrp); /* rotate raster image */ 11320: if ( nextrp == NULL ) break; /* something's terribly wrong */ 11321: delete_raster(rotrp); /* free previous raster image */ 11322: rotrp = nextrp; /* and replace it with rotated one */ 11323: n90--; } /* decrement remaining count */ 11324: } /* --- end-of-if(isn90) --- */ 11325: /* ------------------------------------------------------------------------- 11326: requested rotation not multiple of 90 degrees 11327: -------------------------------------------------------------------------- */ 11328: if ( !isn90 ) /* explicitly construct rotation */ 11329: { ; } /* not yet implemented */ 11330: /* ------------------------------------------------------------------------- 11331: re-populate subraster envelope with rotated image 11332: -------------------------------------------------------------------------- */ 11333: /* --- re-init various subraster parameters, embedding raster in it --- */ 11334: if ( rotrp != NULL ) /* rotated raster constructed okay */ 11335: { rotsp->type = IMAGERASTER; /* signal constructed image */ 11336: rotsp->image = rotrp; /* raster we just constructed */ 11337: /* --- now try to guess pleasing baseline --- */ 11338: if ( idegrees > 2 ) { /* leave unchanged if unrotated */ 11339: if ( strlen(subexpr) < 3 /* we rotated a short expression */ 11340: || abs(idegrees-180) < 3 ) /* or just turned it upside-down */ 11341: baseline = rotrp->height - 1; /* so set with nothing descending */ 11342: else /* rotated a long expression */ 11343: baseline = (65*(rotrp->height-1))/100; } /* roughly center long expr */ 11344: rotsp->baseline = baseline; } /* set baseline as calculated above*/ 11345: /* --- return rotated subexpr to caller --- */ 11346: end_of_job: 11347: return ( rotsp ); /*return rotated subexpr to caller*/ 11348: } /* --- end-of-function rastrotate() --- */ 11349: 11350: 11351: /* ========================================================================== 11352: * Function: rastmagnify ( expression, size, basesp, arg1, arg2, arg3 ) 11353: * Purpose: \magnify{magstep}{subexpression} handler, returns subraster 11354: * containing magnified subexpression 11355: * -------------------------------------------------------------------------- 11356: * Arguments: expression (I/O) char ** to first char of null-terminated 11357: * string immediately following \reflectbox to 11358: * be rasterized, and returning ptr immediately 11359: * following last character processed. 11360: * size (I) int containing 0-7 default font size 11361: * basesp (I) subraster * to character (or subexpression) 11362: * immediately preceding \reflectbox 11363: * (unused, but passed for consistency) 11364: * arg1 (I) int unused 11365: * arg2 (I) int unused 11366: * arg3 (I) int unused 11367: * -------------------------------------------------------------------------- 11368: * Returns: ( subraster * ) ptr to subraster corresponding to \magnify 11369: * requested, or NULL for any parsing error 11370: * -------------------------------------------------------------------------- 11371: * Notes: o Summary of syntax... 11372: * \magnify{magstep}{subexpression} 11373: * o 11374: * ======================================================================= */ 11375: /* --- entry point --- */ 11376: subraster *rastmagnify ( char **expression, int size, subraster *basesp, 11377: int arg1, int arg2, int arg3 ) 11378: { 11379: /* ------------------------------------------------------------------------- 11380: Allocations and Declarations 11381: -------------------------------------------------------------------------- */ 11382: char *texsubexpr(), subexpr[MAXSUBXSZ+1], *magexpr=subexpr; /* args */ 11383: subraster *rasterize(), *magsp=NULL; /* subraster for magnified subexpr */ 11384: raster *rastmag(), *magrp=NULL; /* magnify subraster->image */ 11385: int magstep = 1; /* default magnification */ 11386: int delete_raster(); /* delete intermediate raster */ 11387: int baseline=0; /* baseline of rasterized image */ 11388: /* ------------------------------------------------------------------------- 11389: obtain {magstep} argument immediately following \magnify command 11390: -------------------------------------------------------------------------- */ 11391: /* --- parse for {magstep} arg, and bump expression past it --- */ 11392: *expression = texsubexpr(*expression,magexpr,255,"{","}",0,0); 11393: magstep = atoi(magexpr); /* convert {magstep} to int */ 11394: if ( magstep<1 || magstep>10 ) /* check magstep input */ 11395: magstep = 1; /* back to default if illegal */ 11396: /* ------------------------------------------------------------------------- 11397: obtain {subexpr} argument after {magstep}, and rasterize it 11398: -------------------------------------------------------------------------- */ 11399: /* --- parse for {subexpr} arg, and bump expression past it --- */ 11400: *expression = texsubexpr(*expression,subexpr,0,"{","}",0,0); 11401: /* --- rasterize subexpression to be reflected --- */ 11402: if ( (magsp = rasterize(subexpr,size)) /* rasterize subexpression */ 11403: == NULL ) goto end_of_job; /* and quit if failed */ 11404: /* --- return unmodified image if no magnification requested --- */ 11405: if ( magstep<=1 ) goto end_of_job; /* don't bother magnifying image */ 11406: /* --- extract params for image to be magnified --- */ 11407: magrp = magsp->image; /* unmagnified rasterized image */ 11408: baseline = magsp->baseline; /* and baseline of that image */ 11409: /* ------------------------------------------------------------------------- 11410: magnify image and adjust its parameters 11411: -------------------------------------------------------------------------- */ 11412: /* --- magnify image --- */ 11413: magrp = rastmag(magsp->image,magstep); /* magnify raster image */ 11414: if ( magrp == NULL ) goto end_of_job; /* failed to magnify image */ 11415: delete_raster(magsp->image); /* free original raster image */ 11416: magsp->image = magrp; /*and replace it with magnified one*/ 11417: /* --- adjust parameters --- */ 11418: baseline *= magstep; /* scale baseline */ 11419: if ( baseline > 0 ) baseline += 1; /* adjust for no descenders */ 11420: magsp->baseline = baseline; /*reset baseline of magnified image*/ 11421: /* --- return magnified subexpr to caller --- */ 11422: end_of_job: 11423: return ( magsp ); /*back to caller with magnified expr*/ 11424: } /* --- end-of-function rastmagnify() --- */ 11425: 11426: 11427: /* ========================================================================== 11428: * Function: rastreflect ( expression, size, basesp, arg1, arg2, arg3 ) 11429: * Purpose: \reflectbox[axis]{subexpression} handler, returns subraster 11430: * containing subexpression reflected horizontally (i.e., around 11431: * vertical axis, |_ becomes _|) if [axis] not given or axis=1, 11432: * or reflected vertically if axis=2 given. 11433: * -------------------------------------------------------------------------- 11434: * Arguments: expression (I/O) char ** to first char of null-terminated 11435: * string immediately following \reflectbox to 11436: * be rasterized, and returning ptr immediately 11437: * following last character processed. 11438: * size (I) int containing 0-7 default font size 11439: * basesp (I) subraster * to character (or subexpression) 11440: * immediately preceding \reflectbox 11441: * (unused, but passed for consistency) 11442: * arg1 (I) int unused 11443: * arg2 (I) int unused 11444: * arg3 (I) int unused 11445: * -------------------------------------------------------------------------- 11446: * Returns: ( subraster * ) ptr to subraster corresponding to \reflectbox 11447: * requested, or NULL for any parsing error 11448: * -------------------------------------------------------------------------- 11449: * Notes: o Summary of syntax... 11450: * \reflectbox[axis]{subexpression} 11451: * o 11452: * ======================================================================= */ 11453: /* --- entry point --- */ 11454: subraster *rastreflect ( char **expression, int size, subraster *basesp, 11455: int arg1, int arg2, int arg3 ) 11456: { 11457: /* ------------------------------------------------------------------------- 11458: Allocations and Declarations 11459: -------------------------------------------------------------------------- */ 11460: char *texsubexpr(), subexpr[MAXSUBXSZ+1], *axisexpr=subexpr; /* args */ 11461: subraster *rasterize(), *refsp=NULL; /* subraster for reflected subexpr */ 11462: raster *rastref(), *refrp=NULL; /* reflect subraster->image */ 11463: int axis = 1; /* default horizontal reflection */ 11464: int delete_raster(); /* delete intermediate raster */ 11465: int baseline=0; /* baseline of rasterized image */ 11466: /* ------------------------------------------------------------------------- 11467: obtain [axis] argument immediately following \reflectbox command, if given 11468: -------------------------------------------------------------------------- */ 11469: /* --- check for optional [axis] arg --- */ 11470: if ( *(*expression) == '[' ) /*check for []-enclosed optional arg*/ 11471: { *expression = texsubexpr(*expression,axisexpr,255,"[","]",0,0); 11472: axis = atoi(axisexpr); /* convert [axis] to int */ 11473: if ( axis<1 || axis>2 ) /* check axis input */ 11474: axis = 1; } /* back to default if illegal */ 11475: /* ------------------------------------------------------------------------- 11476: obtain {subexpr} argument after optional [axis], and rasterize it 11477: -------------------------------------------------------------------------- */ 11478: /* --- parse for {subexpr} arg, and bump expression past it --- */ 11479: *expression = texsubexpr(*expression,subexpr,0,"{","}",0,0); 11480: /* --- rasterize subexpression to be reflected --- */ 11481: if ( (refsp = rasterize(subexpr,size)) /* rasterize subexpression */ 11482: == NULL ) goto end_of_job; /* and quit if failed */ 11483: /* --- return unmodified image if no reflection requested --- */ 11484: if ( axis<1 || axis>2 ) goto end_of_job; /* don't bother reflecting image */ 11485: /* --- extract params for image to be reflected --- */ 11486: refrp = refsp->image; /* unreflected rasterized image */ 11487: baseline = refsp->baseline; /* and baseline of that image */ 11488: /* ------------------------------------------------------------------------- 11489: reflect image and adjust its parameters 11490: -------------------------------------------------------------------------- */ 11491: /* --- reflect image --- */ 11492: refrp = rastref(refsp->image,axis); /* reflect raster image */ 11493: if ( refrp == NULL ) goto end_of_job; /* failed to reflect image */ 11494: delete_raster(refsp->image); /* free original raster image */ 11495: refsp->image = refrp; /*and replace it with reflected one*/ 11496: /* --- adjust parameters --- */ 11497: if ( axis == 2 ) /* for vertical reflection */ 11498: baseline = refrp->height - 1; /* set with nothing descending */ 11499: refsp->baseline = baseline; /* reset baseline of reflected image*/ 11500: /* --- return reflected subexpr to caller --- */ 11501: end_of_job: 11502: return ( refsp ); /*back to caller with reflected expr*/ 11503: } /* --- end-of-function rastreflect() --- */ 11504: 11505: 11506: /* ========================================================================== 11507: * Function: rastfbox ( expression, size, basesp, arg1, arg2, arg3 ) 11508: * Purpose: \fbox{subexpression} handler, returns subraster 11509: * containing subexpression with frame box drawn around it 11510: * -------------------------------------------------------------------------- 11511: * Arguments: expression (I/O) char ** to first char of null-terminated 11512: * string immediately following \fbox to be 11513: * rasterized, and returning ptr immediately 11514: * following last character processed. 11515: * size (I) int containing 0-7 default font size 11516: * basesp (I) subraster * to character (or subexpression) 11517: * immediately preceding \fbox 11518: * (unused, but passed for consistency) 11519: * arg1 (I) int unused 11520: * arg2 (I) int unused 11521: * arg3 (I) int unused 11522: * -------------------------------------------------------------------------- 11523: * Returns: ( subraster * ) ptr to subraster corresponding to \fbox 11524: * requested, or NULL for any parsing error 11525: * -------------------------------------------------------------------------- 11526: * Notes: o Summary of syntax... 11527: * \fbox[width][height]{subexpression} 11528: * o 11529: * ======================================================================= */ 11530: /* --- entry point --- */ 11531: subraster *rastfbox ( char **expression, int size, subraster *basesp, 11532: int arg1, int arg2, int arg3 ) 11533: { 11534: /* ------------------------------------------------------------------------- 11535: Allocations and Declarations 11536: -------------------------------------------------------------------------- */ 11537: char *texsubexpr(), subexpr[MAXSUBXSZ+1], widtharg[512]; /* args */ 11538: subraster *rasterize(), *framesp=NULL; /* rasterize subexpr to be framed */ 11539: raster *border_raster(), *bp=NULL; /* framed image raster */ 11540: int evalterm(), evalue=0; /* interpret [width][height] */ 11541: int fwidth=6, fthick=1, /*extra frame width, line thickness*/ 11542: fsides=0; /* frame sides: 1=left,2=top,4=right,8=bot */ 11543: int width=(-1), height=(-1), /* optional [width][height] args */ 11544: iscompose = 0; /* set true if optional args given */ 11545: /* ------------------------------------------------------------------------- 11546: obtain optional [width][height] arguments immediately following \fbox 11547: -------------------------------------------------------------------------- */ 11548: /* --- first check for optional \fbox[width] --- */ 11549: if ( *(*expression) == '[' ) { /* check for []-enclosed width arg */ 11550: *expression = texsubexpr(*expression,widtharg,511,"[","]",0,0); 11551: if ( !isempty(widtharg) ) { /* got widtharg */ 11552: char *comma = strchr(widtharg,','); /* look for [width,sides] */ 11553: if ( comma == (char *)NULL ) /* no comma */ 11554: comma = strchr(widtharg,';'); /* permit semicolon [width;sides] */ 11555: if ( comma != (char *)NULL ) { /* optional [width,fsides] found */ 11556: fsides = atoi(comma+1); /* interpret fsides after comma */ 11557: if ( size < 5 ) /* for smaller fonts */ 11558: { fwidth = 2; fthick = 1; } /* tighten frame, thinner accent */ 11559: else { fwidth = 3; fthick = 2; } /* loosen frame, thicken accent */ 11560: *comma = '\000'; /* null-terminate width at comma */ 11561: trimwhite(widtharg); } /*remove leading/trailing whitespace*/ 11562: if ( comma==(char *)NULL || !isempty(widtharg) ) { /* have a width */ 11563: height = 1; /* default explicit height, too */ 11564: if ( fsides == 0 ) { /* a normal framebox */ 11565: evalue = eround(widtharg); /* interpret and scale width */ 11566: width = max2(1,evalue); /* must be >0 */ 11567: fwidth = 2; iscompose = 1; } 11568: else /* absolute pixels for "accents" */ 11569: width = evalterm(mimestore,widtharg); } 11570: } /* --- end-of-if(!isempty(widtharg)) --- */ 11571: } /* --- end-of-if(**expression=='[') --- */ 11572: if ( width > 0 || fsides > 0) /* found leading [width], so... */ 11573: if ( *(*expression) == '[' ) /* check for []-enclosed height arg */ 11574: { *expression = texsubexpr(*expression,widtharg,511,"[","]",0,0); 11575: if ( !isempty(widtharg) ) { /* got widtharg */ 11576: if ( fsides == 0 ) { /* a normal framebox */ 11577: evalue = eround(widtharg); /* interpret and scale height */ 11578: height = max2(1,evalue); /* must be >0 */ 11579: fwidth = 0; } /* no extra border */ 11580: else /* absolute pixels for "accents" */ 11581: height = evalterm(mimestore,widtharg); } 11582: } /* --- end-of-if(**expression=='[') --- */ 11583: /* ------------------------------------------------------------------------- 11584: obtain {subexpr} argument 11585: -------------------------------------------------------------------------- */ 11586: /* --- parse for {subexpr} arg, and bump expression past it --- */ 11587: *expression = texsubexpr(*expression,subexpr,0,"{","}",0,0); 11588: /* --- rasterize subexpression to be framed --- */ 11589: if ( width<0 || height<0 ) /* no explicit dimensions given */ 11590: { if ( (framesp = rasterize(subexpr,size)) /* rasterize subexpression */ 11591: == NULL ) goto end_of_job; } /* and quit if failed */ 11592: else 11593: { char composexpr[8192]; /* compose subexpr with empty box */ 11594: sprintf(composexpr,"\\compose{\\hspace{%d}\\vspace{%d}}{%.8000s}", 11595: width,height,subexpr); 11596: if ( (framesp = rasterize(composexpr,size)) /* rasterize subexpression */ 11597: == NULL ) goto end_of_job; } /* and quit if failed */ 11598: /* ------------------------------------------------------------------------- 11599: draw frame, reset params, and return it to caller 11600: -------------------------------------------------------------------------- */ 11601: /* --- draw border --- */ 11602: if ( fsides > 0 ) fthick += (100*fsides); /* embed fsides in fthick arg */ 11603: if ( (bp = border_raster(framesp->image,-fwidth,-fwidth,fthick,1)) 11604: == NULL ) goto end_of_job; /* draw border and quit if failed */ 11605: /* --- replace original image and raise baseline to accommodate frame --- */ 11606: framesp->image = bp; /* replace image with framed one */ 11607: if ( !iscompose ) /* simple border around subexpr */ 11608: framesp->baseline += fwidth; /* so just raise baseline */ 11609: else 11610: framesp->baseline = (framesp->image)->height - 1; /* set at bottom */ 11611: /* --- return framed subexpr to caller --- */ 11612: end_of_job: 11613: return ( framesp ); /* return framed subexpr to caller */ 11614: } /* --- end-of-function rastfbox() --- */ 11615: 11616: 11617: /* ========================================================================== 11618: * Function: rastinput ( expression, size, basesp, arg1, arg2, arg3 ) 11619: * Purpose: \input{filename} handler, reads filename and returns 11620: * subraster containing image of expression read from filename 11621: * -------------------------------------------------------------------------- 11622: * Arguments: expression (I/O) char ** to first char of null-terminated 11623: * string immediately following \input to be 11624: * rasterized, and returning ptr immediately 11625: * following last character processed. 11626: * size (I) int containing 0-7 default font size 11627: * basesp (I) subraster * to character (or subexpression) 11628: * immediately preceding \input 11629: * (unused, but passed for consistency) 11630: * arg1 (I) int unused 11631: * arg2 (I) int unused 11632: * arg3 (I) int unused 11633: * -------------------------------------------------------------------------- 11634: * Returns: ( subraster * ) ptr to subraster corresponding to expression 11635: * in filename, or NULL for any parsing error 11636: * -------------------------------------------------------------------------- 11637: * Notes: o Summary of syntax... 11638: * \input{filename} reads entire file named filename 11639: * \input{filename:tag} reads filename, but returns only 11640: * those characters between <tag>...</tag> in that file. 11641: * o 11642: * ======================================================================= */ 11643: /* --- entry point --- */ 11644: subraster *rastinput ( char **expression, int size, subraster *basesp, 11645: int arg1, int arg2, int arg3 ) 11646: { 11647: /* ------------------------------------------------------------------------- 11648: Allocations and Declarations 11649: -------------------------------------------------------------------------- */ 11650: char *texsubexpr(), tag[1024]="\000", filename[1024]="\000"; /* args */ 11651: subraster *rasterize(), *inputsp=NULL; /* rasterized input image */ 11652: int status, rastreadfile(); /* read input file */ 11653: int format=0, npts=0; /* don't reformat (numerical) input */ 11654: int isinput = (seclevel<=inputseclevel?1:0); /*true if \input permitted*/ 11655: /*int evalterm();*/ /* evaluate expressions */ 11656: char *inputpath = INPUTPATH; /* permitted \input{} paths for any user */ 11657: int isstrstr(); /* search for valid inputpath in filename */ 11658: char subexpr[MAXFILESZ+1] = "\000", /*concatanated lines from input file*/ 11659: *mimeprep(), /* preprocess inputted data */ 11660: *dbltoa(), *reformat=NULL; /* reformat numerical input */ 11661: /* ------------------------------------------------------------------------- 11662: obtain [tag]{filename} argument 11663: -------------------------------------------------------------------------- */ 11664: /* --- parse for optional [tag] or [fmt] arg, bump expression past it --- */ 11665: if ( *(*expression) == '[' ) /* check for []-enclosed value */ 11666: { char argfld[MAXTOKNSZ+1]; /* optional argument field */ 11667: *expression = texsubexpr(*expression,argfld,MAXTOKNSZ-1,"[","]",0,0); 11668: if ( (reformat=strstr(argfld,"dtoa")) != NULL ) /*dtoa/dbltoa requested*/ 11669: { format = 1; /* signal dtoa()/dbltoa() format */ 11670: if ( (reformat=strchr(reformat,'=')) != NULL ) /* have dtoa= */ 11671: npts = (int)strtol(reformat+1,NULL,0); } /* so set npts */ 11672: if ( format == 0 ) { /* reformat not requested */ 11673: strninit(tag,argfld,1020); } } /* so interpret arg as tag */ 11674: /* --- parse for {filename} arg, and bump expression past it --- */ 11675: *expression = texsubexpr(*expression,filename,1020,"{","}",0,0); 11676: /* --- check for alternate filename:tag --- */ 11677: if ( !isempty(filename) /* got filename */ 11678: /*&& isempty(tag)*/ ) /* but no [tag] */ 11679: { char *delim = strchr(filename,':'); /* look for : in filename:tag */ 11680: if ( delim != (char *)NULL ) /* found it */ 11681: { *delim = '\000'; /* null-terminate filename at : */ 11682: strninit(tag,delim+1,1020); } } /* and stuff after : is tag */ 11683: /* --- check filename for an inputpath valid for all users --- */ 11684: if ( !isinput /* if this user can't \input{} */ 11685: && !isempty(filename) /* and we got a filename */ 11686: && !isempty(inputpath) ) /* and an inputpath */ 11687: if ( isstrstr(filename,inputpath,0) ) /* filename has allowed inputpath */ 11688: isinput = 1; /* okay to \input{} this filename */ 11689: /* --- guard against recursive runaway (e.g., file \input's itself) --- */ 11690: if ( ++ninputcmds > 8 ) /* max \input's per expression */ 11691: isinput = 0; /* flip flag off after the max */ 11692: /* -------------------------------------------------------------------------- 11693: Read file (and convert to numeric if [dtoa] option was given) 11694: -------------------------------------------------------------------------- */ 11695: if ( isinput ) { /* user permitted to use \input{} */ 11696: status = rastreadfile(filename,0,tag,subexpr); /* read file */ 11697: if ( *subexpr == '\000' ) goto end_of_job; /* quit if problem */ 11698: /* --- rasterize input subexpression --- */ 11699: mimeprep(subexpr); /* preprocess subexpression */ 11700: if ( format == 1 ) { /* dtoa()/dbltoa() */ 11701: double d = strtod(subexpr,NULL); /* interpret subexpr as double */ 11702: if ( d != 0.0 ) /* conversion to double successful */ 11703: if ( (reformat=dbltoa(d,npts)) != NULL ) /* reformat successful */ 11704: strcpy(subexpr,reformat); } /*replace subexpr with reformatted*/ 11705: } /* --- end-of-if(isinput) --- */ 11706: /* -------------------------------------------------------------------------- 11707: emit error message for unauthorized users trying to use \input{} 11708: -------------------------------------------------------------------------- */ 11709: else { /* inputseclevel > seclevel */ 11710: sprintf(subexpr, 11711: "\\ \\text{[\\backslash input\\lbrace %.128s\\rbrace\\ not permitted]}\\ ", 11712: (isempty(filename)?"???":filename)); 11713: } /* --- end-of-if/else(isinput) --- */ 11714: /* -------------------------------------------------------------------------- 11715: Rasterize constructed subexpression 11716: -------------------------------------------------------------------------- */ 11717: inputsp = rasterize(subexpr,size); /* rasterize subexpression */ 11718: /* --- return input image to caller --- */ 11719: end_of_job: 11720: return ( inputsp ); /* return input image to caller */ 11721: } /* --- end-of-function rastinput() --- */ 11722: 11723: 11724: /* ========================================================================== 11725: * Function: rastcounter ( expression, size, basesp, arg1, arg2, arg3 ) 11726: * Purpose: \counter[value]{filename} handler, returns subraster 11727: * containing image of counter value read from filename 11728: * (or optional [value]), and increments counter 11729: * -------------------------------------------------------------------------- 11730: * Arguments: expression (I/O) char ** to first char of null-terminated 11731: * string immediately following \counter to be 11732: * rasterized, and returning ptr immediately 11733: * following last character processed. 11734: * size (I) int containing 0-7 default font size 11735: * basesp (I) subraster * to character (or subexpression) 11736: * immediately preceding \counter 11737: * (unused, but passed for consistency) 11738: * arg1 (I) int unused 11739: * arg2 (I) int unused 11740: * arg3 (I) int unused 11741: * -------------------------------------------------------------------------- 11742: * Returns: ( subraster * ) ptr to subraster corresponding to \counter 11743: * requested, or NULL for any parsing error 11744: * -------------------------------------------------------------------------- 11745: * Notes: o Summary of syntax... 11746: * \counter[value][logfile]{filename:tag} 11747: * o :tag is optional 11748: * ======================================================================= */ 11749: /* --- entry point --- */ 11750: subraster *rastcounter ( char **expression, int size, subraster *basesp, 11751: int arg1, int arg2, int arg3 ) 11752: { 11753: /* ------------------------------------------------------------------------- 11754: Allocations and Declarations 11755: -------------------------------------------------------------------------- */ 11756: char *texsubexpr(), filename[1024]="\000", /* counter file */ 11757: logfile[1024]="\000", tag[1024]="\000"; /*optional log file and tag*/ 11758: subraster *rasterize(), *countersp=NULL; /* rasterized counter image */ 11759: FILE /* *fp=NULL,*/ *logfp=NULL; /* counter and log file pointers */ 11760: int status=0,rastreadfile(),rastwritefile(), /*read,write counter file*/ 11761: iscounter = (seclevel<=counterseclevel?1:0), /*is \counter permitted*/ 11762: isstrict = 1; /* true to only write to existing files */ 11763: char text[MAXFILESZ] = "1_", /* only line in counter file without tags */ 11764: *delim = NULL, /* delimiter in text */ 11765: utext[128] = "1_", /* default delimiter */ 11766: *udelim = utext+1; /* underscore delimiter */ 11767: char *rasteditfilename(), /* edit log file name */ 11768: *timestamp(), /* timestamp for logging */ 11769: *dbltoa(); /* double to comma-separated ascii */ 11770: int counter = 1, /* atoi(text) (after _ removed, if present) */ 11771: value = 1, /* optional [value] argument */ 11772: gotvalue = 0, /* set true if [value] supplied */ 11773: isdelta = 0, /* set true if [+value] or [-value] is delta*/ 11774: ordindex = (-1); /* ordinal[] index to append ordinal suffix */ 11775: /*--- ordinal suffixes based on units digit of counter ---*/ 11776: static char *ordinal[]={"th","st","nd","rd","th","th","th","th","th","th"}; 11777: static char *logvars[]={"REMOTE_ADDR","HTTP_REFERER",NULL}; /* log vars*/ 11778: static int commentvar = 1; /* logvars[commentvar] replaced by comment */ 11779: /* ------------------------------------------------------------------------- 11780: first obtain optional [value][logfile] args immediately following \counter 11781: -------------------------------------------------------------------------- */ 11782: /* --- first check for optional \counter[value] --- */ 11783: if ( *(*expression) == '[' ) /* check for []-enclosed value */ 11784: { *expression = texsubexpr(*expression,text,1023,"[","]",0,0); 11785: if ( *text != '\000' ) /* got counter value (or logfile) */ 11786: if ( strlen(text) >= 1 ) { /* and it's not an empty string */ 11787: if ( isthischar(*text,"+-0123456789") ) /* check for leading +-digit */ 11788: gotvalue = 1; /* signal we got optional value */ 11789: else /* not +-digit, so must be logfile */ 11790: strcpy(logfile,text); } /* so just copy it */ 11791: } /* --- end-of-if(**expression=='[') --- */ 11792: /* --- next check for optional \counter[][logfile] --- */ 11793: if ( *(*expression) == '[' ) /* check for []-enclosed logfile */ 11794: { *expression = texsubexpr(*expression,filename,1023,"[","]",0,0); 11795: if ( *filename != '\000' ) /* got logfile (or counter value) */ 11796: if ( strlen(filename) >= 1 ) { /* and it's not an empty string */ 11797: if ( !(isthischar(*text,"+-0123456789")) /* not a leading +-digit */ 11798: || gotvalue ) /* or we already got counter value */ 11799: strcpy(logfile,filename); /* so just copy it */ 11800: else /* leading +-digit must be value */ 11801: { strcpy(text,filename); /* copy value to text line */ 11802: gotvalue = 1; } } /* and signal we got optional value*/ 11803: } /* --- end-of-if(**expression=='[') --- */ 11804: /* --- evaluate [value] if present --- */ 11805: if ( gotvalue ) { /*leading +-digit should be in text*/ 11806: if ( *text == '+' ) isdelta = (+1); /* signal adding */ 11807: if ( *text == '-' ) isdelta = (-1); /* signal subtracting */ 11808: value = (int)(strtod((isdelta==0?text:text+1),&udelim)+0.1); /*abs(value)*/ 11809: if ( isdelta == (-1) ) value = (-value); /* set negative value if needed */ 11810: counter = value; /* re-init counter */ 11811: } /* --- end-of-if(gotvalue) --- */ 11812: /* ------------------------------------------------------------------------- 11813: obtain counter {filename} argument 11814: -------------------------------------------------------------------------- */ 11815: /* --- parse for {filename} arg, and bump expression past it --- */ 11816: *expression = texsubexpr(*expression,filename,1023,"{","}",0,0); 11817: /* --- check for counter filename:tag --- */ 11818: if ( *filename != '\000' ) /* got filename */ 11819: if ( (delim=strchr(filename,':')) /* look for : in filename:tag */ 11820: != (char *)NULL ) /* found it */ 11821: { *delim = '\000'; /* null-terminate filename at : */ 11822: strcpy(tag,delim+1); } /* and stuff after : is tag */ 11823: /* -------------------------------------------------------------------------- 11824: emit error message for unauthorized users trying to use \counter{} 11825: -------------------------------------------------------------------------- */ 11826: if ( !iscounter ) { /* counterseclevel > seclevel */ 11827: sprintf(text, 11828: "\\ \\text{[\\backslash counter\\lbrace %.128s\\rbrace\\ not permitted]}\\ ", 11829: (isempty(filename)?"???":filename)); 11830: goto rasterize_counter; /* rasterize error message */ 11831: } /* --- end-of-if(!iscounter) --- */ 11832: /* -------------------------------------------------------------------------- 11833: Read and parse file, increment and rewrite counter (with optional underscore) 11834: -------------------------------------------------------------------------- */ 11835: if ( strlen(filename) > 1 ) /* make sure we got {filename} arg */ 11836: { 11837: /* --- read and interpret first (and only) line from counter file --- */ 11838: if ( !gotvalue || (isdelta!=0) ) /*if no [count] arg or if delta arg*/ 11839: if ( (status=rastreadfile(filename,1,tag,text)) > 0 ) /*try reading file*/ 11840: { char *vdelim = NULL; /* underscore delim from file */ 11841: double fileval = strtod(text,&vdelim); /* value and delim from file */ 11842: counter = (int)(fileval<0.0?fileval-0.1:fileval+0.1); /* integerized */ 11843: counter += value; /* bump count by 1 or add/sub delta*/ 11844: if ( !gotvalue ) udelim=vdelim; } /* default to file's current delim */ 11845: /* --- check for ordinal suffix --- */ 11846: if ( udelim != (char *)NULL ) /* have some delim after value */ 11847: if ( *udelim == '_' ) /* underscore signals ordinal */ 11848: { int abscount = (counter>=0?counter:(-counter)); /* abs(counter) */ 11849: ordindex = abscount%10; /* least significant digit */ 11850: if ( abscount >= 10 ) /* counter is 10 or greater */ 11851: if ( (abscount/10)%10 == 1 ) /* and the last two are 10-19 */ 11852: ordindex = 0; } /* use th for 11,12,13 rather than st,nd,rd */ 11853: /* --- rewrite counter file --- */ 11854: if ( status >= 0 ) /* file was read okay */ 11855: { sprintf(text,"%d",counter); /*build image of incremented counter*/ 11856: if ( ordindex >= 0 ) strcat(text,"_"); /* tack on _ */ 11857: if ( *tag == '\000' ) strcat(text,"\n"); /* and newline */ 11858: status = rastwritefile(filename,tag,text,isstrict); } /*rewrite counter*/ 11859: } /* --- end-of-if(strlen(filename)>1) --- */ 11860: /* -------------------------------------------------------------------------- 11861: log counter request 11862: -------------------------------------------------------------------------- */ 11863: if ( strlen(logfile) > 1 ) /* optional [logfile] given */ 11864: { 11865: char comment[1024] = "\000", /* embedded comment, logfile:comment*/ 11866: *commptr = strchr(logfile,':'); /* check for : signalling comment */ 11867: int islogokay = 1; /* logfile must exist if isstrict */ 11868: if ( commptr != NULL ) /* have embedded comment */ 11869: { strcpy(comment,commptr+1); /* comment follows : */ 11870: *commptr = '\000'; } /* null-terminate actual logfile */ 11871: strcpy(logfile,rasteditfilename(logfile)); /* edit log file name */ 11872: if ( *logfile == '\000' ) islogokay = 0; /* given an invalid file name */ 11873: else if ( isstrict ) { /*okay, but only write if it exists*/ 11874: if ( (logfp=fopen(logfile,"r")) == (FILE *)NULL ) /*doesn't already exist*/ 11875: islogokay = 0; /* so don't write log file */ 11876: else fclose(logfp); } /* close file opened for test read */ 11877: if ( islogokay ) /* okay to write logfile */ 11878: if ( (logfp = fopen(logfile,"a")) /* open logfile */ 11879: != (FILE *)NULL ) { /* opened successfully for append */ 11880: int ilog=0; /* logvars[] index */ 11881: fprintf(logfp,"%s ",timestamp(TZDELTA,0)); /* first emit timestamp */ 11882: if (*tag=='\000') fprintf(logfp,"%s",filename); /* emit counter filename */ 11883: else fprintf(logfp,"<%s>",tag); /* or tag if we have one */ 11884: fprintf(logfp,"=%d",counter); /* emit counter value */ 11885: if ( status < 1 ) /* read or re-write failed */ 11886: fprintf(logfp,"(%s %d)","error status",status); /* emit error */ 11887: for ( ilog=0; logvars[ilog] != NULL; ilog++ ) /* log till end-of-table */ 11888: if ( ilog == commentvar /* replace with comment... */ 11889: && commptr != NULL ) /* ...if available */ 11890: fprintf(logfp," %.256s",comment); /* log embedded comment */ 11891: else 11892: { char *logval = getenv(logvars[ilog]); /*getenv(variable) to be logged*/ 11893: fprintf(logfp," %.64s", /* log variable */ 11894: (logval!=NULL?logval:"<unknown>")); } /* emit value or <unknown> */ 11895: fprintf(logfp,"\n"); /* terminating newline */ 11896: fclose(logfp); /* close logfile */ 11897: } /* --- end-of-if(islogokay&&logfp!=NULL) --- */ 11898: } /* --- end-of-if(strlen(logfile)>1) --- */ 11899: /* -------------------------------------------------------------------------- 11900: construct counter expression and rasterize it 11901: -------------------------------------------------------------------------- */ 11902: /* --- construct expression --- */ 11903: /*sprintf(text,"%d",counter);*/ /* start with counter */ 11904: strcpy(text,dbltoa(((double)counter),0)); /* comma-separated counter value */ 11905: if ( ordindex >= 0 ) /* need to tack on ordinal suffix */ 11906: { strcat(text,"^{\\underline{\\rm~"); /* start with ^ and {\underline{\rm */ 11907: strcat(text,ordinal[ordindex]); /* then st,nd,rd, or th */ 11908: strcat(text,"}}"); } /* finish with }} */ 11909: /* --- rasterize it --- */ 11910: rasterize_counter: 11911: countersp = rasterize(text,size); /* rasterize counter subexpression */ 11912: /* --- return counter image to caller --- */ 11913: /*end_of_job:*/ 11914: return ( countersp ); /* return counter image to caller */ 11915: } /* --- end-of-function rastcounter() --- */ 11916: 11917: 11918: /* ========================================================================== 11919: * Function: rasteval ( expression, size, basesp, arg1, arg2, arg3 ) 11920: * Purpose: handle \eval 11921: * -------------------------------------------------------------------------- 11922: * Arguments: expression (I/O) char ** to first char of null-terminated 11923: * string immediately following \eval, 11924: * and returning ptr immediately 11925: * following last character processed. 11926: * size (I) int containing 0-7 default font size 11927: * basesp (I) subraster * to character (or subexpression) 11928: * immediately preceding \eval 11929: * (unused, but passed for consistency) 11930: * arg1 (I) int unused 11931: * arg2 (I) int unused 11932: * arg3 (I) int unused 11933: * -------------------------------------------------------------------------- 11934: * Returns: ( subraster * ) subraster ptr to date stamp 11935: * -------------------------------------------------------------------------- 11936: * Notes: o 11937: * ======================================================================= */ 11938: /* --- entry point --- */ 11939: subraster *rasteval ( char **expression, int size, subraster *basesp, 11940: int arg1, int arg2, int arg3 ) 11941: { 11942: /* ------------------------------------------------------------------------- 11943: Allocations and Declarations 11944: -------------------------------------------------------------------------- */ 11945: char *texsubexpr(), subexpr[MAXSUBXSZ]; /* arg to be evaluated */ 11946: subraster *rasterize(), *evalsp=NULL; /* rasterize evaluated expression */ 11947: int evalterm(), value=0; /* evaluate expression */ 11948: /* ------------------------------------------------------------------------- 11949: Parse for subexpr to be \eval-uated, and bump expression past it 11950: -------------------------------------------------------------------------- */ 11951: *expression = texsubexpr(*expression,subexpr,0,"{","}",0,0); 11952: if ( *subexpr == '\000' ) /* couldn't get subexpression */ 11953: goto end_of_job; /* nothing to do, so quit */ 11954: /* ------------------------------------------------------------------------- 11955: Evaluate expression, ascii-ize integer result, rasterize it 11956: -------------------------------------------------------------------------- */ 11957: /* --- evaluate expression --- */ 11958: value = evalterm(mimestore,subexpr); /* evaluate expression */ 11959: /* --- ascii-ize it --- */ 11960: sprintf(subexpr,"%d",value); /* ascii version of value */ 11961: /* --- rasterize ascii-ized expression value --- */ 11962: evalsp = rasterize(subexpr,size); /* rasterize evaluated expression */ 11963: /* --- return evaluated expression raster to caller --- */ 11964: end_of_job: 11965: return ( evalsp ); /* return evaluated expr to caller */ 11966: } /* --- end-of-function rasteval() --- */ 11967: 11968: 11969: /* ========================================================================== 11970: * Function: rasttoday ( expression, size, basesp, arg1, arg2, arg3 ) 11971: * Purpose: handle \today 11972: * -------------------------------------------------------------------------- 11973: * Arguments: expression (I/O) char ** to first char of null-terminated 11974: * string immediately following \today, 11975: * and returning ptr immediately 11976: * following last character processed. 11977: * size (I) int containing 0-7 default font size 11978: * basesp (I) subraster * to character (or subexpression) 11979: * immediately preceding \today 11980: * (unused, but passed for consistency) 11981: * arg1 (I) int unused 11982: * arg2 (I) int unused 11983: * arg3 (I) int unused 11984: * -------------------------------------------------------------------------- 11985: * Returns: ( subraster * ) subraster ptr to date stamp 11986: * -------------------------------------------------------------------------- 11987: * Notes: o 11988: * ======================================================================= */ 11989: /* --- entry point --- */ 11990: subraster *rasttoday ( char **expression, int size, subraster *basesp, 11991: int arg1, int arg2, int arg3 ) 11992: { 11993: /* ------------------------------------------------------------------------- 11994: Allocations and Declarations 11995: -------------------------------------------------------------------------- */ 11996: char *texsubexpr(), optarg[2050]; /* optional [+/-tzdelta,ifmt] args */ 11997: char *timestamp(), *today=optarg; /* timestamp to be rasterized */ 11998: subraster *rasterize(), *todaysp=NULL; /* rasterize timestamp */ 11999: int ifmt=1, tzdelta=0; /* default timestamp() args */ 12000: /* ------------------------------------------------------------------------- 12001: Get optional args \today[+/-tzdelta,ifmt] 12002: -------------------------------------------------------------------------- */ 12003: /* --- check for optional \today[+/-tzdelta,ifmt] --- */ 12004: if ( *(*expression) == '[' ) /* check for []-enclosed value */ 12005: { *expression = texsubexpr(*expression,optarg,2047,"[","]",0,0); 12006: if ( *optarg != '\000' ) /* got optional arg */ 12007: { char *comma = strchr(optarg,','); /* comma between +/-tzdelta,ifmt */ 12008: int iarg, nargs=(comma==NULL?1:2); /* #optional args between []'s */ 12009: if ( comma != NULL ) *comma = '\000'; /* null-terminate first arg */ 12010: for ( iarg=1; iarg<=nargs; iarg++ ) /* process one or both args */ 12011: { char *arg = (iarg==1?optarg:comma+1); /* choose 1st or 2nd arg */ 12012: if ( isthischar(*arg,"+-") ) /* leading +/- signals tzdelta */ 12013: tzdelta = atoi(arg); /* so interpret arg as tzdelta */ 12014: else ifmt = atoi(arg); } /* else interpret args as ifmt */ 12015: } /* --- end-of-if(*optarg!='\0') --- */ 12016: } /* --- end-of-if(**expression=='[') --- */ 12017: /* ------------------------------------------------------------------------- 12018: Get timestamp and rasterize it 12019: -------------------------------------------------------------------------- */ 12020: strcpy(today,"\\text{"); /* rasterize timestamp as text */ 12021: strcat(today,timestamp(tzdelta,ifmt)); /* get timestamp */ 12022: strcat(today,"}"); /* terminate \text{} braces */ 12023: todaysp = rasterize(today,size); /* rasterize timestamp */ 12024: /* --- return timestamp raster to caller --- */ 12025: /*end_of_job:*/ 12026: return ( todaysp ); /* return timestamp to caller */ 12027: } /* --- end-of-function rasttoday() --- */ 12028: 12029: 12030: /* ========================================================================== 12031: * Function: rastcalendar ( expression, size, basesp, arg1, arg2, arg3 ) 12032: * Purpose: handle \calendar 12033: * -------------------------------------------------------------------------- 12034: * Arguments: expression (I/O) char ** to first char of null-terminated 12035: * string immediately following \calendar 12036: * and returning ptr immediately 12037: * following last character processed. 12038: * size (I) int containing 0-7 default font size 12039: * basesp (I) subraster * to character (or subexpression) 12040: * immediately preceding \calendar 12041: * (unused, but passed for consistency) 12042: * arg1 (I) int unused 12043: * arg2 (I) int unused 12044: * arg3 (I) int unused 12045: * -------------------------------------------------------------------------- 12046: * Returns: ( subraster * ) subraster ptr to rendered one-month calendar 12047: * -------------------------------------------------------------------------- 12048: * Notes: o 12049: * ======================================================================= */ 12050: /* --- entry point --- */ 12051: subraster *rastcalendar ( char **expression, int size, subraster *basesp, 12052: int arg1, int arg2, int arg3 ) 12053: { 12054: /* ------------------------------------------------------------------------- 12055: Allocations and Declarations 12056: -------------------------------------------------------------------------- */ 12057: char *texsubexpr(), optarg[2050]; /* optional [year,month] args */ 12058: char *calendar(), *calstr=NULL; /* calendar to be rasterized */ 12059: subraster *rasterize(), *calendarsp=NULL; /* rasterize calendar string */ 12060: int year=0,month=0,day=0, argval=0; /* default calendar() args */ 12061: /* ------------------------------------------------------------------------- 12062: Get optional args \today[+/-tzdelta,ifmt] 12063: -------------------------------------------------------------------------- */ 12064: /* --- check for optional \calendar[year,month] --- */ 12065: if ( *(*expression) == '[' ) /* check for []-enclosed value */ 12066: { *expression = texsubexpr(*expression,optarg,2047,"[","]",0,0); 12067: if ( *optarg != '\000' ) /* got optional arg */ 12068: { char *comma = strchr(optarg,','), /* comma between year,month */ 12069: *comma2 = NULL; /* second comma before day */ 12070: int iarg, nargs=(comma==NULL?1:2); /* #optional args between []'s */ 12071: if ( comma != NULL ) { *comma = '\000'; /*null-terminate first arg*/ 12072: if ( (comma2=strchr(comma+1,',')) != NULL ) /* have third arg */ 12073: { *comma2 = '\000'; nargs++; } } /* null-term 2nd arg, bump count */ 12074: for ( iarg=1; iarg<=nargs; iarg++ ) /* process one or both args */ 12075: { char *arg= (iarg==1?optarg:(iarg==2?comma+1:comma2+1)); /*get arg*/ 12076: argval = atoi(arg); /* interpret arg as integer */ 12077: if ( iarg < 3 ) /* first two args are month,year */ 12078: {if ( argval>1972 && argval<2100 ) year = argval; /* year value */ 12079: else if ( argval>=1 && argval<=12 ) month = argval;} /*or month*/ 12080: else /* only 3rd arg can be day */ 12081: if ( argval>=1 && argval<=31 ) day = argval; } /* day value */ 12082: } /* --- end-of-if(*optarg!='\0') --- */ 12083: } /* --- end-of-if(**expression=='[') --- */ 12084: /* ------------------------------------------------------------------------- 12085: Get calendar string and rasterize it 12086: -------------------------------------------------------------------------- */ 12087: if ( msgfp!= NULL && msglevel>=9 ) 12088: fprintf(msgfp,"rastcalendar> year=%d, month=%d, day=%d\n", 12089: year,month,day); 12090: calstr = calendar(year,month,day); /* get calendar string */ 12091: calendarsp = rasterize(calstr,size); /* rasterize calendar string */ 12092: /* --- return calendar raster to caller --- */ 12093: /*end_of_job:*/ 12094: return ( calendarsp ); /* return calendar to caller */ 12095: } /* --- end-of-function rastcalendar() --- */ 12096: 12097: 12098: /* ========================================================================== 12099: * Function: rastenviron ( expression, size, basesp, arg1, arg2, arg3 ) 12100: * Purpose: handle \environment 12101: * -------------------------------------------------------------------------- 12102: * Arguments: expression (I/O) char ** to first char of null-terminated 12103: * string immediately following \environment 12104: * and returning ptr immediately 12105: * following last character processed (in this 12106: * case, \environment takes no arguments, so 12107: * expression is returned unchanged). 12108: * size (I) int containing 0-7 default font size 12109: * basesp (I) subraster * to character (or subexpression) 12110: * immediately preceding \environment 12111: * (unused, but passed for consistency) 12112: * arg1 (I) int unused 12113: * arg2 (I) int unused 12114: * arg3 (I) int unused 12115: * -------------------------------------------------------------------------- 12116: * Returns: ( subraster * ) subraster ptr to rendered environment image 12117: * -------------------------------------------------------------------------- 12118: * Notes: o 12119: * ======================================================================= */ 12120: /* --- entry point --- */ 12121: subraster *rastenviron ( char **expression, int size, subraster *basesp, 12122: int arg1, int arg2, int arg3 ) 12123: { 12124: /* ------------------------------------------------------------------------- 12125: Allocations and Declarations 12126: -------------------------------------------------------------------------- */ 12127: char *texsubexpr(), optarg[255]; /* optional [...] args (for future)*/ 12128: char environstr[8192] = "\000", /* string for all environment vars */ 12129: environvar[1024] = "\000"; /* one environment variable */ 12130: char *strwrap(), /* wrap long lines */ 12131: *strdetex(), /* removes/replaces any math chars */ 12132: *environptr = NULL; /* ptr to preprocessed environvar */ 12133: char *mimeprep(); /* preprocess environvar string */ 12134: int unescape_url(); /* convert all %xx's to chars */ 12135: int isenviron = (seclevel<=environseclevel?1:0); /*is \environ permitted*/ 12136: int maxvarlen = 512, /* max chars in environment var */ 12137: maxenvlen = 6400, /* max chars in entire string */ 12138: wraplen = 48; /* strwrap() wrap lines at 48 chars*/ 12139: int ienv = 0; /* environ[] index */ 12140: subraster *rasterize(), *environsp=NULL; /* rasterize environment string */ 12141: /* ------------------------------------------------------------------------- 12142: Get args 12143: -------------------------------------------------------------------------- */ 12144: /* --- check for optional \environment args --- */ 12145: if ( 1 ) /* there aren't any args (yet) */ 12146: if ( *(*expression) == '[' ) { /* check for []-enclosed value */ 12147: *expression = texsubexpr(*expression,optarg,250,"[","]",0,0); 12148: if ( *optarg != '\000' ) { ; /* got optional arg, so process it */ 12149: wraplen = atoi(optarg); /* interpret \environment[wraplen] */ 12150: if ( wraplen < 1 ) wraplen = 8; /* set minimum */ 12151: } /* --- end-of-if(*optarg!='\0') --- */ 12152: } /* --- end-of-if(**expression=='[') --- */ 12153: /* -------------------------------------------------------------------------- 12154: emit error message for unauthorized users trying to use \environ 12155: -------------------------------------------------------------------------- */ 12156: if ( !isenviron ) { /* environseclevel > seclevel */ 12157: sprintf(environstr, 12158: "\\ \\text{[\\backslash environment\\ not permitted]}\\ "); 12159: goto rasterize_environ; /* rasterize error message */ 12160: } /* --- end-of-if(!isenviron) --- */ 12161: /* ------------------------------------------------------------------------- 12162: Accumulate environment variables and rasterize string containing them 12163: -------------------------------------------------------------------------- */ 12164: *environstr = '\000'; /* reset environment string */ 12165: strcat(environstr,"\\nocaching\\fbox{\\normalsize\\text{"); /*init string*/ 12166: for ( ienv=0; ; ienv++ ) { /* loop over environ[] strings */ 12167: if ( environ[ienv] == (char *)NULL ) break; /* null terminates list */ 12168: if ( *(environ[ienv]) == '\000' ) break; /* double-check empty string */ 12169: strninit(environvar,environ[ienv],maxvarlen); /* max length displayed */ 12170: if ( strlen(environ[ienv]) > maxvarlen ) /* we truncated the variable */ 12171: strcat(environvar,"..."); /* so add an ellipsis */ 12172: unescape_url(environvar,0); /* convert all %xx's to chars */ 12173: environptr = strdetex(environvar,1); /* remove/replace any math chars */ 12174: strninit(environvar,environptr,maxvarlen); /*de-tex'ed/nomath environvar*/ 12175: environptr = strwrap(environvar,wraplen,-6); /* wrap long lines */ 12176: strninit(environvar,environptr,maxvarlen); /* line-wrapped environvar */ 12177: mimeprep(environvar); /* preprocess environvar string */ 12178: if ( strlen(environstr) + strlen(environvar) > maxenvlen ) break; 12179: sprintf(environstr+strlen(environstr), /* display environment string */ 12180: " %2d. %s\\\\\n", ienv+1,environvar); 12181: if ( msgfp!= NULL && msglevel>=9 ) 12182: fprintf(msgfp,"rastenviron> %2d. %.256s\n", 12183: ienv+1,/*environ[ienv]*/environvar); 12184: if ( strlen(environstr) >= 7200 ) break; /* don't overflow buffer */ 12185: } /* --- end-of-for(ienv) --- */ 12186: strcat(environstr,"}}"); /* end {\text{...}} mode */ 12187: rasterize_environ: 12188: environsp = rasterize(environstr,size); /* rasterize environment string */ 12189: /* --- return environment raster to caller --- */ 12190: /*end_of_job:*/ 12191: return ( environsp ); /* return environment to caller */ 12192: } /* --- end-of-function rastenviron() --- */ 12193: 12194: 12195: /* ========================================================================== 12196: * Function: rastmessage ( expression, size, basesp, arg1, arg2, arg3 ) 12197: * Purpose: handle \message 12198: * -------------------------------------------------------------------------- 12199: * Arguments: expression (I/O) char ** to first char of null-terminated 12200: * string immediately following \message 12201: * and returning ptr immediately 12202: * following last character processed. 12203: * size (I) int containing 0-7 default font size 12204: * basesp (I) subraster * to character (or subexpression) 12205: * immediately preceding \mesasge 12206: * (unused, but passed for consistency) 12207: * arg1 (I) int unused 12208: * arg2 (I) int unused 12209: * arg3 (I) int unused 12210: * -------------------------------------------------------------------------- 12211: * Returns: ( subraster * ) subraster ptr to rendered message image 12212: * -------------------------------------------------------------------------- 12213: * Notes: o 12214: * ======================================================================= */ 12215: /* --- entry point --- */ 12216: subraster *rastmessage ( char **expression, int size, subraster *basesp, 12217: int arg1, int arg2, int arg3 ) 12218: { 12219: /* ------------------------------------------------------------------------- 12220: Allocations and Declarations 12221: -------------------------------------------------------------------------- */ 12222: char *texsubexpr(), amsg[256]="\000"; /* message number text */ 12223: int imsg = 0; /* default message number */ 12224: char msg[4096]; 12225: subraster *rasterize(), *messagesp=NULL; /* rasterize requested message */ 12226: int strreplace(); /*replace SERVER_NAME in refmsgnum*/ 12227: int reflevels = REFLEVELS; /* #topmost levels to match */ 12228: char *urlprune(); /*prune referer_match in refmsgnum*/ 12229: char *strdetex(); /* remove math chars from messages */ 12230: char *http_host = getenv("HTTP_HOST"), /* http host for mimeTeX */ 12231: *server_name = getenv("SERVER_NAME"), /* server hosting mimeTeX */ 12232: *referer_match = (!isempty(http_host)?http_host: /*match http_host*/ 12233: (!isempty(server_name)?server_name:(NULL))); /* or server_name */ 12234: /* ------------------------------------------------------------------------- 12235: obtain message {amsg} argument 12236: -------------------------------------------------------------------------- */ 12237: /* --- parse for {amsg} arg, and bump expression past it --- */ 12238: *expression = texsubexpr(*expression,amsg,255,"{","}",0,0); 12239: /* --- interpret argument --- */ 12240: if ( *amsg != '\000' ) { /* got amsg arg */ 12241: imsg = atoi(amsg); /* interpret as an int */ 12242: if ( imsg < 0 /* if too small */ 12243: || imsg > maxmsgnum ) /* or too big */ 12244: imsg = 0; } /* default to first message */ 12245: /* --- retrieve requested message --- */ 12246: strninit(msg,msgtable[imsg],4095); /* local copy of message */ 12247: /* --- process as necessary --- */ 12248: if ( imsg == refmsgnum) { /* urlncmp() failed to validate */ 12249: if ( reflevels > 0 ) /* have #levels to validate */ 12250: strreplace(msg,"SERVER_NAME", /* replace SERVER_NAME */ 12251: strdetex(urlprune(referer_match,reflevels),1),0); /*with referer_match*/ 12252: } /* --- end-of-switch(imsg) --- */ 12253: /* --- rasterize requested message --- */ 12254: messagesp = rasterize(msg,size); /* rasterize message string */ 12255: /* --- return message raster to caller --- */ 12256: /*end_of_job:*/ 12257: return ( messagesp ); /* return message to caller */ 12258: } /* --- end-of-function rastmessage() --- */ 12259: 12260: 12261: /* ========================================================================== 12262: * Function: rastnoop ( expression, size, basesp, nargs, arg2, arg3 ) 12263: * Purpose: no op -- flush \escape without error 12264: * -------------------------------------------------------------------------- 12265: * Arguments: expression (I/O) char ** to first char of null-terminated 12266: * string immediately following \escape to be 12267: * flushed, and returning ptr immediately 12268: * following last character processed. 12269: * size (I) int containing 0-5 default font size 12270: * basesp (I) subraster * to character (or subexpression) 12271: * immediately preceding \escape 12272: * (unused, but passed for consistency) 12273: * nargs (I) int containing number of {}-args after 12274: * \escape to be flushed along with it 12275: * arg2 (I) int unused 12276: * arg3 (I) int unused 12277: * -------------------------------------------------------------------------- 12278: * Returns: ( subraster * ) NULL subraster ptr 12279: * -------------------------------------------------------------------------- 12280: * Notes: o 12281: * ======================================================================= */ 12282: /* --- entry point --- */ 12283: subraster *rastnoop ( char **expression, int size, subraster *basesp, 12284: int nargs, int arg2, int arg3 ) 12285: { 12286: /* ------------------------------------------------------------------------- 12287: Allocations and Declarations 12288: -------------------------------------------------------------------------- */ 12289: char *texsubexpr(), subexpr[MAXSUBXSZ+1]; /*dummy args eaten by \escape*/ 12290: subraster *rasterize(), *noopsp=NULL; /* rasterize subexpr */ 12291: /* --- flush accompanying args if necessary --- */ 12292: if ( nargs != NOVALUE /* not unspecified */ 12293: && nargs > 0 ) /* and args to be flushed */ 12294: while ( --nargs >= 0 ) /* count down */ 12295: *expression = texsubexpr(*expression,subexpr,0,"{","}",0,0); /*flush arg*/ 12296: /* --- return null ptr to caller --- */ 12297: /*end_of_job:*/ 12298: return ( noopsp ); /* return NULL ptr to caller */ 12299: } /* --- end-of-function rastnoop() --- */ 12300: 12301: 12302: /* ========================================================================== 12303: * Function: rastopenfile ( filename, mode ) 12304: * Purpose: Opens filename[.tex] in mode, returning FILE * 12305: * -------------------------------------------------------------------------- 12306: * Arguments: filename (I/O) char * to null-terminated string containing 12307: * name of file to open (preceded by path 12308: * relative to mimetex executable) 12309: * If fopen() fails, .tex appeneded, 12310: * and returned if that fopen() succeeds 12311: * mode (I) char * to null-terminated string containing 12312: * fopen() mode 12313: * -------------------------------------------------------------------------- 12314: * Returns: ( FILE * ) pointer to opened file, or NULL if error 12315: * -------------------------------------------------------------------------- 12316: * Notes: o 12317: * ======================================================================= */ 12318: /* --- entry point --- */ 12319: FILE *rastopenfile ( char *filename, char *mode ) 12320: { 12321: /* ------------------------------------------------------------------------- 12322: Allocations and Declarations 12323: -------------------------------------------------------------------------- */ 12324: FILE *fp = (FILE *)NULL /*,*fopen()*/; /*file pointer to opened filename*/ 12325: char texfile[2050] = "\000", /* local, edited copy of filename */ 12326: *rasteditfilename(), /* prepend pathprefix if necessary */ 12327: amode[512] = "r"; /* test open mode if arg mode=NULL */ 12328: int ismode = 0; /* true of mode!=NULL */ 12329: /* -------------------------------------------------------------------------- 12330: Check mode and open file 12331: -------------------------------------------------------------------------- */ 12332: /* --- edit filename --- */ 12333: strncpy(texfile,rasteditfilename(filename),2047); /*edited copy of filename*/ 12334: texfile[2047] = '\000'; /* make sure it's null terminated */ 12335: /* --- check mode --- */ 12336: if ( mode != (char *)NULL ) /* caller passed mode arg */ 12337: if ( *mode != '\000' ) /* and it's not an empty string */ 12338: { ismode = 1; /* so flip mode flag true */ 12339: strncpy(amode,mode,254); /* and replace "r" with caller's */ 12340: amode[254] = '\000'; /* make sure it's null terminated */ 12341: compress(amode,' '); } /* remove embedded blanks */ 12342: /* --- open filename or filename.tex --- */ 12343: if ( strlen(texfile) > 1 ) /* make sure we got actual filename*/ 12344: if ( (fp = fopen(texfile,amode)) /* try opening given filename */ 12345: == NULL ) /* failed to open given filename */ 12346: { strcpy(filename,texfile); /* signal possible filename error */ 12347: strcat(texfile,".tex"); /* but first try adding .tex */ 12348: if ( (fp = fopen(texfile,amode)) /* now try opening filename.tex */ 12349: != NULL ) /* filename.tex succeeded */ 12350: strcpy(filename,texfile); } /* replace caller's filename */ 12351: /* --- close file if only opened to check name --- */ 12352: if ( !ismode && fp!=NULL ) /* no mode, so just checking */ 12353: fclose(fp); /* close file, fp signals success */ 12354: /* --- return fp or NULL to caller --- */ 12355: /*end_of_job:*/ 12356: if ( msglevel>=9 && msgfp!=NULL ) /* debuging */ 12357: { fprintf(msgfp,"rastopenfile> returning fopen(%s,%s) = %s\n", 12358: filename,amode,(fp==NULL?"NULL":"Okay")); fflush(msgfp); } 12359: return ( fp ); /* return fp or NULL to caller */ 12360: } /* --- end-of-function rastopenfile() --- */ 12361: 12362: 12363: /* ========================================================================== 12364: * Function: rasteditfilename ( filename ) 12365: * Purpose: edits filename to remove security problems, 12366: * e.g., removes all ../'s and ..\'s. 12367: * -------------------------------------------------------------------------- 12368: * Arguments: filename (I) char * to null-terminated string containing 12369: * name of file to be edited 12370: * -------------------------------------------------------------------------- 12371: * Returns: ( char * ) pointer to edited filename, 12372: * or empty string "\000" if any problem 12373: * -------------------------------------------------------------------------- 12374: * Notes: o 12375: * ======================================================================= */ 12376: /* --- entry point --- */ 12377: char *rasteditfilename ( char *filename ) 12378: { 12379: /* ------------------------------------------------------------------------- 12380: Allocations and Declarations 12381: -------------------------------------------------------------------------- */ 12382: static char editname[2050]; /*edited filename returned to caller*/ 12383: char *strchange(); /* prepend pathprefix if necessary */ 12384: int strreplace(), /* remove ../'s and ..\'s */ 12385: isprefix = (*pathprefix=='\000'?0:1); /* true if paths have prefix */ 12386: /* -------------------------------------------------------------------------- 12387: edit filename 12388: -------------------------------------------------------------------------- */ 12389: /* --- first check filename arg --- */ 12390: *editname = '\000'; /* init edited name as empty string*/ 12391: if ( filename == (char *)NULL ) goto end_of_job; /* no filename arg */ 12392: if ( *filename == '\000' ) goto end_of_job; /* filename is an empty string */ 12393: /* --- init edited filename --- */ 12394: strcpy(editname,filename); /* init edited name as input name */ 12395: compress(editname,' '); /* remove embedded blanks */ 12396: /* --- remove leading or embedded ....'s --- */ 12397: while ( strreplace(editname,"....",NULL,0) > 0 ) ; /* squeeze out ....'s */ 12398: /* --- remove leading / and \ and dots (and blanks) --- */ 12399: if ( *editname != '\000' ) /* still have chars in filename */ 12400: while ( isthischar(*editname," ./\\") ) /* absolute paths invalid */ 12401: {strsqueeze(editname,1);} /* so flush leading / or \ (or ' ')*/ 12402: if ( *editname == '\000' ) goto end_of_job; /* no chars left in filename */ 12403: /* --- remove leading or embedded ../'s and ..\'s --- */ 12404: while ( strreplace(editname,"../",NULL,0) > 0 ) ; /* squeeze out ../'s */ 12405: while ( strreplace(editname,"..\\",NULL,0) > 0 ) ; /* and ..\'s */ 12406: while ( strreplace(editname,"../",NULL,0) > 0 ) ; /* and ../'s again */ 12407: /* --- prepend path prefix (if compiled with -DPATHPREFIX) --- */ 12408: if ( isprefix && *editname!='\000' ) /* filename is preceded by prefix */ 12409: strchange(0,editname,pathprefix); /* so prepend prefix */ 12410: end_of_job: 12411: return ( editname ); /* back with edited filename */ 12412: } /* --- end-of-function rasteditfilename() --- */ 12413: 12414: 12415: /* ========================================================================== 12416: * Function: rastreadfile ( filename, islock, tag, value ) 12417: * Purpose: Read filename, returning value as string 12418: * between <tag>...</tag> or entire file if tag=NULL passed. 12419: * -------------------------------------------------------------------------- 12420: * Arguments: filename (I) char * to null-terminated string containing 12421: * name of file to read (preceded by path 12422: * relative to mimetex executable) 12423: * islock (I) int containing 1 to lock file while reading 12424: * (hopefully done by opening in "r+" mode) 12425: * tag (I) char * to null-terminated string containing 12426: * html-like tagname. File contents between 12427: * <tag> and </tag> will be returned, or 12428: * entire file if tag=NULL passed. 12429: * value (O) char * returning value between <tag>...</tag> 12430: * or entire file if tag=NULL. 12431: * -------------------------------------------------------------------------- 12432: * Returns: ( int ) 1=okay, 0=some error 12433: * -------------------------------------------------------------------------- 12434: * Notes: o 12435: * ======================================================================= */ 12436: /* --- entry point --- */ 12437: int rastreadfile ( char *filename, int islock, char *tag, char *value ) 12438: { 12439: /* ------------------------------------------------------------------------- 12440: Allocations and Declarations 12441: -------------------------------------------------------------------------- */ 12442: FILE *fp = (FILE *)NULL, *rastopenfile(); /* pointer to opened filename */ 12443: char texfile[1024] = "\000", /* local copy of input filename */ 12444: text[MAXLINESZ+1]; /* line from input file */ 12445: char *tagp, tag1[1024], tag2[1024]; /* left <tag> and right <tag/> */ 12446: int vallen=0, maxvallen=MAXFILESZ; /* #chars in value, max allowed */ 12447: int status = (-1); /* status returned, 1=okay */ 12448: int tagnum = 0; /* tag we're looking for */ 12449: /*int islock = 1;*/ /* true to lock file */ 12450: /* -------------------------------------------------------------------------- 12451: Open file 12452: -------------------------------------------------------------------------- */ 12453: /* --- first check output arg --- */ 12454: if ( value == (char *)NULL ) goto end_of_job; /* no output buffer supplied */ 12455: *value = '\000'; /* init buffer with empty string */ 12456: /* --- open filename or filename.tex --- */ 12457: if ( filename != (char *)NULL ) /* make sure we got filename arg */ 12458: { strncpy(texfile,filename,1023); /* local copy of filename */ 12459: texfile[1023] = '\000'; /* make sure it's null terminated */ 12460: fp = rastopenfile(texfile,(islock?"r+":"r")); } /* try opening it */ 12461: /* --- check that file opened --- */ 12462: if ( fp == (FILE *)NULL ) /* failed to open file */ 12463: { sprintf(value,"{\\normalsize\\rm[file %s?]}",texfile); 12464: goto end_of_job; } /* return error message to caller */ 12465: status = 0; /* file opened successfully */ 12466: if ( islock ) rewind(fp); /* start at beginning of file */ 12467: /* -------------------------------------------------------------------------- 12468: construct <tag>'s 12469: -------------------------------------------------------------------------- */ 12470: if ( tag != (char *)NULL ) /* caller passed tag arg */ 12471: if ( *tag != '\000' ) /* and it's not an empty string */ 12472: { strcpy(tag1,"<"); strcpy(tag2,"</"); /* begin with < and </ */ 12473: strcat(tag1,tag); strcat(tag2,tag); /* followed by caller's tag */ 12474: strcat(tag1,">"); strcat(tag2,">"); /* ending both tags with > */ 12475: compress(tag1,' '); compress(tag2,' '); /* remove embedded blanks */ 12476: tagnum = 1; } /* signal that we have tag */ 12477: /* -------------------------------------------------------------------------- 12478: Read file, concatnate lines 12479: -------------------------------------------------------------------------- */ 12480: while ( fgets(text,MAXLINESZ-1,fp) != (char *)NULL ) { /*read input till eof*/ 12481: switch ( tagnum ) { /* look for left- or right-tag */ 12482: case 0: status = 1; break; /* no tag to look for */ 12483: case 1: /* looking for opening left <tag> */ 12484: if ( (tagp=strstr(text,tag1)) == NULL ) break; /*haven't found it yet*/ 12485: tagp += strlen(tag1); /* first char past tag */ 12486: strsqueezep(text,tagp); /*shift out preceding text and tag*/ 12487: tagnum = 2; /*now looking for closing right tag*/ 12488: case 2: /* looking for closing right </tag> */ 12489: if ( (tagp=strstr(text,tag2)) == NULL ) break; /*haven't found it yet*/ 12490: *tagp = '\000'; /* terminate line at tag */ 12491: tagnum = 3; /* done after this line */ 12492: status = 1; /* successfully read tag */ 12493: break; 12494: } /* ---end-of-switch(tagnum) --- */ 12495: if ( tagnum != 1 ) { /* no tag or left tag already found*/ 12496: int textlen = strlen(text); /* #chars in current line */ 12497: if ( vallen+textlen > maxvallen ) break; /* quit before overflow */ 12498: strcat(value,text); /* concat line to end of value */ 12499: vallen += textlen; /* bump length */ 12500: if ( tagnum > 2 ) break; } /* found right tag, so we're done */ 12501: } /* --- end-of-while(fgets()!=NULL) --- */ 12502: if ( tagnum<1 || tagnum>2 ) status=1; /* okay if no tag or we found tag */ 12503: fclose ( fp ); /* close input file after reading */ 12504: /* --- return value and status to caller --- */ 12505: end_of_job: 12506: return ( status ); /* return status to caller */ 12507: } /* --- end-of-function rastreadfile() --- */ 12508: 12509: 12510: /* ========================================================================== 12511: * Function: rastwritefile ( filename, tag, value, isstrict ) 12512: * Purpose: Re/writes filename, replacing string between <tag>...</tag> 12513: * with value, or writing entire file as value if tag=NULL. 12514: * -------------------------------------------------------------------------- 12515: * Arguments: filename (I) char * to null-terminated string containing 12516: * name of file to write (preceded by path 12517: * relative to mimetex executable) 12518: * tag (I) char * to null-terminated string containing 12519: * html-like tagname. File contents between 12520: * <tag> and </tag> will be replaced, or 12521: * entire file written if tag=NULL passed. 12522: * value (I) char * containing string replacing value 12523: * between <tag>...</tag> or replacing entire 12524: * file if tag=NULL. 12525: * isstrict (I) int containing 1 to only rewrite existing 12526: * files, or 0 to create new file if necessary. 12527: * -------------------------------------------------------------------------- 12528: * Returns: ( int ) 1=okay, 0=some error 12529: * -------------------------------------------------------------------------- 12530: * Notes: o 12531: * ======================================================================= */ 12532: /* --- entry point --- */ 12533: int rastwritefile( char *filename, char *tag, char *value, int isstrict ) 12534: { 12535: /* ------------------------------------------------------------------------- 12536: Allocations and Declarations 12537: -------------------------------------------------------------------------- */ 12538: FILE *fp = (FILE *)NULL, *rastopenfile(); /* pointer to opened filename */ 12539: char texfile[1024] = "\000", /* local copy of input filename */ 12540: filebuff[MAXFILESZ+1] = "\000", /* entire contents of file */ 12541: tag1[1024], tag2[1024], /* left <tag> and right <tag/> */ 12542: *strchange(), /* put value between <tag>...</tag>*/ 12543: *timestamp(); /* log modification time */ 12544: int istag=0, rastreadfile(), /* read file if tag!=NULL */ 12545: /*isstrict = (seclevel>5? 1:0),*/ /*true only writes existing files*/ 12546: isnewfile = 0, /* true if writing new file */ 12547: status = 0; /* status returned, 1=okay */ 12548: int istimestamp = 0; /* true to update <timestamp> tag */ 12549: /* -------------------------------------------------------------------------- 12550: check args 12551: -------------------------------------------------------------------------- */ 12552: /* --- check filename and value --- */ 12553: if ( filename == (char *)NULL /* quit if no filename arg supplied*/ 12554: || value == (char *)NULL ) goto end_of_job; /* or no value arg supplied */ 12555: if ( strlen(filename) < 2 /* quit if unreasonable filename */ 12556: || *value == '\000' ) goto end_of_job; /* or empty value string supplied */ 12557: /* --- establish filename[.tex] --- */ 12558: strncpy(texfile,filename,1023); /* local copy of input filename */ 12559: texfile[1023] = '\000'; /* make sure it's null terminated */ 12560: if ( rastopenfile(texfile,NULL) /* unchanged or .tex appended */ 12561: == (FILE *)NULL ) /* can't open, so write new file */ 12562: { if ( isstrict ) goto end_of_job; /* fail if new files not permitted */ 12563: isnewfile = 1; } /* signal we're writing new file */ 12564: /* --- check whether tag supplied by caller --- */ 12565: if ( tag != (char *)NULL ) /* caller passed tag argument */ 12566: if ( *tag != '\000' ) /* and it's not an empty string */ 12567: { istag = 1; /* so flip tag flag true */ 12568: strcpy(tag1,"<"); strcpy(tag2,"</"); /* begin tags with < and </ */ 12569: strcat(tag1,tag); strcat(tag2,tag); /* followed by caller's tag */ 12570: strcat(tag1,">"); strcat(tag2,">"); /* ending both tags with > */ 12571: compress(tag1,' '); compress(tag2,' '); } /* remove embedded blanks */ 12572: /* -------------------------------------------------------------------------- 12573: read existing file if just rewriting a single tag 12574: -------------------------------------------------------------------------- */ 12575: /* --- read original file if only replacing a tag within it --- */ 12576: *filebuff = '\000'; /* init as empty file */ 12577: if ( !isnewfile ) /* if file already exists */ 12578: if ( istag ) /* and just rewriting one tag */ 12579: if ( rastreadfile(texfile,1,NULL,filebuff) /* read entire existing file */ 12580: <= 0 ) goto end_of_job; /* signal error if failed to read */ 12581: /* -------------------------------------------------------------------------- 12582: construct new file data if needed (entire file replaced by value if no tag) 12583: -------------------------------------------------------------------------- */ 12584: if ( istag ) /* only replacing tag in file */ 12585: { 12586: /* --- find <tag> and </tag> in file --- */ 12587: int tlen1=strlen(tag1), tlen2=strlen(tag2), flen; /*tag,buff lengths*/ 12588: char *tagp1 = (isnewfile? NULL:strstr(filebuff,tag1)), /* <tag> in file*/ 12589: *tagp2 = (isnewfile? NULL:strstr(filebuff,tag2)); /*</tag> in file*/ 12590: /* --- if adding new <tag> just concatanate at end of file --- */ 12591: if ( tagp1 == (char *)NULL ) /* add new tag to file */ 12592: { 12593: /* --- preprocess filebuff --- */ 12594: if ( tagp2 != (char *)NULL ) /* apparently have ...</tag> */ 12595: {strsqueezep(filebuff,tagp2+tlen2);} /* remove ...</tag> */ 12596: if ( (flen = strlen(filebuff)) /* #chars currently in buffer */ 12597: > 0 ) /* we have non-empty buffer */ 12598: if (!isthischar(*(filebuff+flen-1),"\n\r")) /*no newline at end of file*/ 12599: if(0)strcat(filebuff,"\n"); /* so add one before new tag */ 12600: /* --- add new tag --- */ 12601: strcat(filebuff,tag1); /* add opening <tag> */ 12602: strcat(filebuff,value); /* then value */ 12603: strcat(filebuff,tag2); /* finally closing </tag> */ 12604: strcat(filebuff,"\n"); /* newline at end of file */ 12605: } /* --- end-of-if(tagp1==NULL) --- */ 12606: else /* found existing opening <tag> */ 12607: { 12608: if ( tagp2 == NULL ) /* apparently have <tag>... */ 12609: { *(tagp1+tlen1) = '\000'; /* so get rid of trailing ... */ 12610: strcat(filebuff,value); /* then concatanate value */ 12611: strcat(filebuff,tag2); } /* and finally closing </tag> */ 12612: else /* else have <tag>...<tag/> */ 12613: if ( (flen=((int)(tagp2-tagp1))-tlen1) /* len of .'s in <tag>...</tag> */ 12614: >= 0 ) /* usually <tag> precedes </tag> */ 12615: strchange(flen,tagp1+tlen1,value); /* change ...'s to value */ 12616: else /* weirdly, </tag> precedes <tag> */ 12617: { char fbuff[4096]; /* field buff for <tag>value</tag> */ 12618: if ( (flen = ((int)(tagp1-tagp2))+tlen1) /* strlen(</tag>...<tag>) */ 12619: <= 0 ) goto end_of_job; /* must be internal error */ 12620: strcpy(fbuff,tag1); /* set opening <tag> */ 12621: strcat(fbuff,value); /* then value */ 12622: strcat(fbuff,tag2); /* finally closing </tag> */ 12623: strchange(flen,tagp2,fbuff); } /* replace original </tag>...<tag> */ 12624: } /* --- end-of-if/else(tagp1==NULL) --- */ 12625: } /* --- end-of-if(istag) --- */ 12626: /* -------------------------------------------------------------------------- 12627: rewrite file and return to caller 12628: -------------------------------------------------------------------------- */ 12629: /* --- first open file for write --- */ 12630: if ( (fp=rastopenfile(texfile,"w")) /* open for write */ 12631: == (FILE *)NULL ) goto end_of_job; /* signal error if can't open */ 12632: /* --- rewrite and close file --- */ 12633: if ( fputs((istag?filebuff:value),fp) /* write filebuff or value */ 12634: != EOF ) status = 1; /* signal success if succeeded */ 12635: fclose ( fp ); /* close output file after writing */ 12636: /* --- modify timestamp --- */ 12637: if ( status > 0 ) /*forget timestamp if write failed*/ 12638: if ( istimestamp ) /* if we're updating timestamp */ 12639: if ( istag ) /* only log time in tagged file */ 12640: if ( strstr(tag,"timestamp") == (char *)NULL ) /* but avoid recursion */ 12641: { char fbuff[2048]; /* field buff <timestamp> value */ 12642: strcpy(fbuff,tag); /* tag modified */ 12643: strcat(fbuff," modified at "); /* spacer */ 12644: strcat(fbuff,timestamp(TZDELTA,0)); /* start with timestamp */ 12645: status = rastwritefile(filename,"timestamp",fbuff,1); } 12646: /* --- return status to caller --- */ 12647: end_of_job: 12648: return ( status ); /* return status to caller */ 12649: } /* --- end-of-function rastwritefile() --- */ 12650: 12651: 12652: /* ========================================================================== 12653: * Function: calendar ( year, month, day ) 12654: * Purpose: returns null-terminated character string containing 12655: * \begin{array}...\end{array} for the one-month calendar 12656: * specified by year=1973...2099 and month=1...12. 12657: * If either arg out-of-range, today's value is used. 12658: * -------------------------------------------------------------------------- 12659: * Arguments: year (I) int containing 1973...2099 or 0 for current 12660: * year 12661: * month (I) int containing 1...12 or 0 for current month 12662: * day (I) int containing day to emphasize or 0 12663: * -------------------------------------------------------------------------- 12664: * Returns: ( char * ) char ptr to null-terminated buffer 12665: * containing \begin{array}...\end{array} 12666: * string that will render calendar for 12667: * requested month, or NULL for any error. 12668: * -------------------------------------------------------------------------- 12669: * Notes: o 12670: * ======================================================================= */ 12671: /* --- entry point --- */ 12672: char *calendar( int year, int month, int day ) 12673: { 12674: /* ------------------------------------------------------------------------- 12675: Allocations and Declarations 12676: -------------------------------------------------------------------------- */ 12677: static char calbuff[4096]; /* calendar returned to caller */ 12678: time_t time_val = (time_t)(0); /* binary value returned by time() */ 12679: struct tm *tmstruct=(struct tm *)NULL, *localtime(); /* interpret time_val */ 12680: int yy=0, mm=0, dd=0; /* today (emphasize today's dd) */ 12681: int idd=1, iday=0, daynumber(); /* day-of-week for idd=1...31 */ 12682: char aval[64]; /* ascii day or 4-digit year */ 12683: /* --- calendar data --- */ 12684: static char *monthnames[] = { "?", "January", "February", "March", "April", 12685: "May", "June", "July", "August", "September", "October", 12686: "November", "December", "?" } ; 12687: static int modays[] = 12688: { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0 }; 12689: /* ------------------------------------------------------------------------- 12690: initialization 12691: -------------------------------------------------------------------------- */ 12692: /* --- get current date/time --- */ 12693: time((time_t *)(&time_val)); /* get date and time */ 12694: tmstruct = localtime((time_t *)(&time_val)); /* interpret time_val */ 12695: yy = 1900 + (int)(tmstruct->tm_year); /* current four-digit year */ 12696: mm = 1 + (int)(tmstruct->tm_mon); /* current month, 1-12 */ 12697: dd = (int)(tmstruct->tm_mday); /* current day, 1-31 */ 12698: /* --- check args --- */ 12699: if ( year<1973 || year>2099 ) year = yy; /* current year if out-of-bounds */ 12700: if ( month<1 || month>12 ) month = mm; /* current month if out-of-bounds */ 12701: if ( month==mm && year==yy && day==0 ) /* current month and default day */ 12702: day = dd; /* emphasize current day */ 12703: modays[2] = (year%4==0?29:28); /* Feb has 29 days in leap years */ 12704: /* --- initialize calendar string --- */ 12705: strcpy(calbuff,"{\\begin{gather}"); /* center `month year` above cal */ 12706: strcat(calbuff,"\\small\\text{"); /* month set in roman */ 12707: strcat(calbuff,monthnames[month]); /* insert month name */ 12708: strcat(calbuff," }"); /* add a space */ 12709: sprintf(aval,"%d",year); /* convert year to ascii */ 12710: strcat(calbuff,aval); /* add year */ 12711: strcat(calbuff,"\\\\"); /* end top row */ 12712: strcat(calbuff, /* now begin calendar arrayr */ 12713: "\\begin{array}{|c|c|c|c|c|c|c|CCCCCC} \\hline" 12714: "\\tiny\\text{Sun} & \\tiny\\text{Mon} & \\tiny\\text{Tue} &" 12715: "\\tiny\\text{Wed} & \\tiny\\text{Thu} & \\tiny\\text{Fri} &" 12716: "\\tiny\\text{Sat} \\\\ \\hline " ); 12717: /* ------------------------------------------------------------------------- 12718: generate calendar 12719: -------------------------------------------------------------------------- */ 12720: for ( idd=1; idd<=modays[month]; idd++ ) /* run through days of month */ 12721: { 12722: /* --- get day-of-week for this day --- */ 12723: iday = 1 + (daynumber(year,month,idd)%7); /* 1=Monday...7=Sunday */ 12724: if ( iday == 7 ) iday = 0; /* now 0=Sunday...6=Saturday */ 12725: /* --- may need empty cells at beginning of month --- */ 12726: if ( idd == 1 ) /* first day of month */ 12727: if ( iday > 0 ) /* need to skip cells */ 12728: { strcpy(aval,"\\ &\\ &\\ &\\ &\\ &\\ &\\ &\\ &\\ &\\"); /*cells to skip*/ 12729: aval[3*iday] = '\000'; /*skip cells preceding 1st of month*/ 12730: strcat(calbuff,aval); } /* add skip string to buffer */ 12731: /* --- add idd to current cell --- */ 12732: sprintf(aval,"%d",idd); /* convert idd to ascii */ 12733: if ( idd == day /* emphasize today's date */ 12734: /*&& month==mm && year==yy*/ ) /* only if this month's calendar */ 12735: { strcat(calbuff,"{\\fs{-1}\\left\\langle "); /*emphasize, 1 size smaller*/ 12736: strcat(calbuff,aval); /* put in idd */ 12737: strcat(calbuff,"\\right\\rangle}"); } /* finish emphasis */ 12738: else /* not today's date */ 12739: strcat(calbuff,aval); /* so just put in idd */ 12740: /* --- terminate cell --- */ 12741: if ( idd < modays[month] ) { /* not yet end-of-month */ 12742: if ( iday < 6 ) /* still have days left in week */ 12743: strcat(calbuff,"&"); /* new cell in same week */ 12744: else /* reached end-of-week */ 12745: strcat(calbuff,"\\\\ \\hline"); } /* so start new week */ 12746: } /* --- end-of-for(idd) --- */ 12747: strcat(calbuff,"\\\\ \\hline"); /* final underline at end-of-month */ 12748: /* --- return calendar to caller --- */ 12749: strcat(calbuff,"\\end{array}\\end{gather}}"); /* terminate array */ 12750: return ( calbuff ); /* back to caller with calendar */ 12751: } /* --- end-of-function calendar() --- */ 12752: 12753: 12754: /* ========================================================================== 12755: * Function: timestamp ( tzdelta, ifmt ) 12756: * Purpose: returns null-terminated character string containing 12757: * current date:time stamp as ccyy-mm-dd:hh:mm:ss{am,pm} 12758: * -------------------------------------------------------------------------- 12759: * Arguments: tzdelta (I) integer, positive or negative, containing 12760: * containing number of hours to be added or 12761: * subtracted from system time (to accommodate 12762: * your desired time zone). 12763: * ifmt (I) integer containing 0 for default format 12764: * -------------------------------------------------------------------------- 12765: * Returns: ( char * ) ptr to null-terminated buffer 12766: * containing current date:time stamp 12767: * -------------------------------------------------------------------------- 12768: * Notes: o 12769: * ======================================================================= */ 12770: /* --- entry point --- */ 12771: char *timestamp( int tzdelta, int ifmt ) 12772: { 12773: /* ------------------------------------------------------------------------- 12774: Allocations and Declarations 12775: -------------------------------------------------------------------------- */ 12776: static char timebuff[256]; /* date:time buffer back to caller */ 12777: /*long time_val = 0L;*/ /* binary value returned by time() */ 12778: time_t time_val = (time_t)(0); /* binary value returned by time() */ 12779: struct tm *tmstruct=(struct tm *)NULL, *localtime(); /* interpret time_val */ 12780: int year=0, hour=0,ispm=1, /* adjust year, and set am/pm hour */ 12781: month=0, day=0, /* adjust day and month for delta */ 12782: minute=0,second=0; /* minute and second not adjusted */ 12783: int tzadjust(); /* time zone adjustment function */ 12784: int daynumber(); /* #days since Jan 1, 1973 */ 12785: static char *daynames[] = { "Monday", "Tuesday", "Wednesday", 12786: "Thursday", "Friday", "Saturday", "Sunday" } ; 12787: static char *monthnames[] = { "?", "January", "February", "March", "April", 12788: "May", "June", "July", "August", "September", "October", 12789: "November", "December", "?" } ; 12790: /* ------------------------------------------------------------------------- 12791: get current date:time, adjust values, and and format stamp 12792: -------------------------------------------------------------------------- */ 12793: /* --- first init returned timebuff in case of any error --- */ 12794: *timebuff = '\000'; 12795: /* --- get current date:time --- */ 12796: time((time_t *)(&time_val)); /* get date and time */ 12797: tmstruct = localtime((time_t *)(&time_val)); /* interpret time_val */ 12798: /* --- extract fields --- */ 12799: year = (int)(tmstruct->tm_year); /* local copy of year, 0=1900 */ 12800: month = (int)(tmstruct->tm_mon) + 1; /* local copy of month, 1-12 */ 12801: day = (int)(tmstruct->tm_mday); /* local copy of day, 1-31 */ 12802: hour = (int)(tmstruct->tm_hour); /* local copy of hour, 0-23 */ 12803: minute= (int)(tmstruct->tm_min); /* local copy of minute,0-59 */ 12804: second= (int)(tmstruct->tm_sec); /* local copy of second,0-59 */ 12805: /* --- adjust year --- */ 12806: year += 1900; /* set century in year */ 12807: /* --- adjust for timezone --- */ 12808: tzadjust(tzdelta,&year,&month,&day,&hour); 12809: /* --- check params --- */ 12810: if ( hour<0 || hour>23 12811: || day<1 || day>31 12812: || month<1 || month>12 12813: || year<1973 ) goto end_of_job; 12814: /* --- adjust hour for am/pm --- */ 12815: switch ( ifmt ) 12816: { 12817: default: 12818: case 0: 12819: if ( hour < 12 ) /* am check */ 12820: { ispm=0; /* reset pm flag */ 12821: if ( hour == 0 ) hour = 12; } /* set 00hrs = 12am */ 12822: if ( hour > 12 ) hour -= 12; /* pm check sets 13hrs to 1pm, etc */ 12823: break; 12824: } /* --- end-of-switch(ifmt) --- */ 12825: /* --- format date:time stamp --- */ 12826: switch ( ifmt ) 12827: { 12828: default: 12829: case 0: /* --- 2005-03-05:11:49:59am --- */ 12830: sprintf(timebuff,"%04d-%02d-%02d:%02d:%02d:%02d%s", year,month,day, 12831: hour,minute,second,((ispm)?"pm":"am")); 12832: break; 12833: case 1: /* --- Saturday, March 5, 2005 --- */ 12834: sprintf(timebuff,"%s, %s %d, %d", 12835: daynames[daynumber(year,month,day)%7],monthnames[month],day,year); 12836: break; 12837: case 2: /* --- Saturday, March 5, 2005, 11:49:59am --- */ 12838: sprintf(timebuff,"%s, %s %d, %d, %d:%02d:%02d%s", 12839: daynames[daynumber(year,month,day)%7],monthnames[month],day,year, 12840: hour,minute,second,((ispm)?"pm":"am")); 12841: break; 12842: case 3: /* --- 11:49:59am --- */ 12843: sprintf(timebuff,"%d:%02d:%02d%s", 12844: hour,minute,second,((ispm)?"pm":"am")); 12845: break; 12846: case 4: /* --- 1231235959 (mmddhhmmss time as integer) --- */ 12847: sprintf(timebuff,"%d%02d%02d%02d%02d", 12848: month,day,hour,minute,second); 12849: break; 12850: } /* --- end-of-switch(ifmt) --- */ 12851: end_of_job: 12852: return ( timebuff ); /* return stamp to caller */ 12853: } /* --- end-of-function timestamp() --- */ 12854: 12855: 12856: /* ========================================================================== 12857: * Function: tzadjust ( tzdelta, year, month, day, hour ) 12858: * Purpose: Adjusts hour, and day,month,year if necessary, 12859: * by delta increment to accommodate your time zone. 12860: * -------------------------------------------------------------------------- 12861: * Arguments: tzdelta (I) integer, positive or negative, containing 12862: * containing number of hours to be added or 12863: * subtracted from given time (to accommodate 12864: * your desired time zone). 12865: * year (I) addr of int containing 4-digit year 12866: * month (I) addr of int containing month 1=Jan - 12=Dec. 12867: * day (I) addr of int containing day 1-31 for Jan. 12868: * hour (I) addr of int containing hour 0-23 12869: * Returns: ( int ) 1 for success, or 0 for error 12870: * -------------------------------------------------------------------------- 12871: * Notes: o 12872: * ======================================================================= */ 12873: /* --- entry point --- */ 12874: int tzadjust ( int tzdelta, int *year, int *month, int *day, int *hour ) 12875: { 12876: /* -------------------------------------------------------------------------- 12877: Allocations and Declarations 12878: -------------------------------------------------------------------------- */ 12879: int yy = *year, mm = *month, dd = *day, hh = *hour; /*dereference args*/ 12880: /* --- calendar data --- */ 12881: static int modays[] = 12882: { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0 }; 12883: /* -------------------------------------------------------------------------- 12884: check args 12885: -------------------------------------------------------------------------- */ 12886: if ( mm<1 || mm>12 ) return(-1); /* bad month */ 12887: if ( dd<1 || dd>modays[mm] ) return(-1); /* bad day */ 12888: if ( hh<0 || hh>23 ) return(-1); /* bad hour */ 12889: if ( tzdelta>23 || tzdelta<(-23) ) return(-1); /* bad tzdelta */ 12890: /* -------------------------------------------------------------------------- 12891: make adjustments 12892: -------------------------------------------------------------------------- */ 12893: /* --- adjust hour --- */ 12894: hh += tzdelta; /* apply caller's delta */ 12895: /* --- adjust for feb 29 --- */ 12896: modays[2] = (yy%4==0?29:28); /* Feb has 29 days in leap years */ 12897: /* --- adjust day --- */ 12898: if ( hh < 0 ) /* went to preceding day */ 12899: { dd--; hh += 24; } 12900: if ( hh > 23 ) /* went to next day */ 12901: { dd++; hh -= 24; } 12902: /* --- adjust month --- */ 12903: if ( dd < 1 ) /* went to preceding month */ 12904: { mm--; dd = modays[mm]; } 12905: if ( dd > modays[mm] ) /* went to next month */ 12906: { mm++; dd = 1; } 12907: /* --- adjust year --- */ 12908: if ( mm < 1 ) /* went to preceding year */ 12909: { yy--; mm = 12; dd = modays[mm]; } 12910: if ( mm > 12 ) /* went to next year */ 12911: { yy++; mm = 1; dd = 1; } 12912: /* --- back to caller --- */ 12913: *year=yy; *month=mm; *day=dd; *hour=hh; /* reset adjusted args */ 12914: return ( 1 ); 12915: } /* --- end-of-function tzadjust() --- */ 12916: 12917: 12918: /* ========================================================================== 12919: * Function: daynumber ( year, month, day ) 12920: * Purpose: Returns number of actual calendar days from Jan 1, 1973 12921: * to the given date (e.g., bvdaynumber(1974,1,1)=365). 12922: * -------------------------------------------------------------------------- 12923: * Arguments: year (I) int containing year -- may be either 1995 or 12924: * 95, or may be either 2010 or 110 for those 12925: * years. 12926: * month (I) int containing month, 1=Jan thru 12=Dec. 12927: * day (I) int containing day of month, 1-31 for Jan, etc. 12928: * Returns: ( int ) Number of days from Jan 1, 1973 to given date, 12929: * or -1 for error (e.g., year<1973). 12930: * -------------------------------------------------------------------------- 12931: * Notes: o 12932: * ======================================================================= */ 12933: /* --- entry point --- */ 12934: int daynumber ( int year, int month, int day ) 12935: { 12936: /* -------------------------------------------------------------------------- 12937: Allocations and Declarations 12938: -------------------------------------------------------------------------- */ 12939: /* --- returned value (note: returned as a default "int") --- */ 12940: int ndays; /* #days since jan 1, year0 */ 12941: /* --- initial conditions --- */ 12942: static int year0 = 73, /* jan 1 was a monday, 72 was a leap */ 12943: days4yrs = 1461, /* #days in 4 yrs = 365*4 + 1 */ 12944: days1yr = 365; 12945: /* --- table of accumulated days per month (last index not used) --- */ 12946: static int modays[] = 12947: { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }; 12948: /* --- variables for #days since day0 --- */ 12949: int nyears, nfouryrs; /*#years, #4-yr periods since year0*/ 12950: /* -------------------------------------------------------------------------- 12951: Check input 12952: -------------------------------------------------------------------------- */ 12953: if ( month < 1 || month > 12 ) /*month used as index, so must be ok*/ 12954: return ( -1 ); /* otherwise, forget it */ 12955: if ( year >= 1900 ) year -= 1900; /*use two-digit years (3 after 2000)*/ 12956: /* -------------------------------------------------------------------------- 12957: Find #days since jan 1, 1973 12958: -------------------------------------------------------------------------- */ 12959: /* --- figure #complete 4-year periods and #remaining yrs till current --- */ 12960: nyears = year - year0; /* #years since year0 */ 12961: if ( nyears < 0 ) return ( -1 ); /* we're not working backwards */ 12962: nfouryrs = nyears/4; /* #complete four-year periods */ 12963: nyears -= (4*nfouryrs); /* remainder excluding current year*/ 12964: /* --- #days from jan 1, year0 till jan 1, this year --- */ 12965: ndays = (days4yrs*nfouryrs) /* #days in 4-yr periods */ 12966: + (days1yr*nyears); /* +remaining days */ 12967: /*if ( year > 100 ) ndays--;*/ /* subtract leap year for 2000AD */ 12968: /* --- add #days within current year --- */ 12969: ndays += (modays[month-1] + (day-1)); 12970: /* --- may need an extra day if current year is a leap year --- */ 12971: if ( nyears == 3 ) /*three preceding yrs so this is 4th*/ 12972: { if ( month > 2 ) /* past feb so need an extra day */ 12973: /*if ( year != 100 )*/ /* unless it's 2000AD */ 12974: ndays++; } /* so add it in */ 12975: return ( (int)(ndays) ); /* #days back to caller */ 12976: } /* --- end-of-function daynumber() --- */ 12977: 12978: 12979: /* ========================================================================== 12980: * Function: strwrap ( s, linelen, tablen ) 12981: * Purpose: Inserts \n's and spaces in (a copy of) s to wrap lines 12982: * at linelen and indent them by tablen. 12983: * -------------------------------------------------------------------------- 12984: * Arguments: s (I) char * to null-terminated string 12985: * to be wrapped. 12986: * linelen (I) int containing maximum linelen 12987: * between \\'s. 12988: * tablen (I) int containing number of spaces to indent 12989: * lines. 0=no indent. Positive means 12990: * only indent first line and not others. 12991: * Negative means indent all lines except first. 12992: * -------------------------------------------------------------------------- 12993: * Returns: ( char * ) ptr to "line-wrapped" copy of s 12994: * or "" (empty string) for any error. 12995: * -------------------------------------------------------------------------- 12996: * Notes: o The returned copy of s has embedded \\'s as necessary 12997: * to wrap lines at linelen. Any \\'s in the input copy 12998: * are removed first. If (and only if) the input s contains 12999: * a terminating \\ then so does the returned copy. 13000: * o The returned pointer addresses a static buffer, 13001: * so don't call strwrap() again until you're finished 13002: * with output from the preceding call. 13003: * o Modified for mimetex from original version written 13004: * for mathtex (where \n in verbatim mode instead of \\ 13005: * produced linebreaks). 13006: * ======================================================================= */ 13007: /* --- entry point --- */ 13008: char *strwrap ( char *s, int linelen, int tablen ) 13009: { 13010: /* ------------------------------------------------------------------------- 13011: Allocations and Declarations 13012: -------------------------------------------------------------------------- */ 13013: static char sbuff[4096]; /* line-wrapped copy of s */ 13014: char *sol = sbuff; /* ptr to start of current line*/ 13015: char tab[32] = " "; /* tab string */ 13016: int strreplace(); /* remove \n's */ 13017: char *strchange(); /* add \n's and indent space */ 13018: int finalnewline = (lastchar(s)=='\n'?1:0); /*newline at end of string?*/ 13019: int istab = (tablen>0?1:0), /* init true to indent first line */ 13020: iswhite = 0; /* true if line break on whitespace*/ 13021: int rhslen = 0, /* remaining right hand side length*/ 13022: thislen = 0, /* length of current line segment */ 13023: thistab = 0, /* length of tab on current line */ 13024: wordlen = 0; /* length to next whitespace char */ 13025: /* ------------------------------------------------------------------------- 13026: Make a clean copy of s 13027: -------------------------------------------------------------------------- */ 13028: /* --- check input --- */ 13029: *sbuff = '\000'; /* initialize in case of error */ 13030: if ( isempty(s) ) goto end_of_job; /* no input */ 13031: if ( tablen < 0 ) tablen = (-tablen); /* set positive tablen */ 13032: if ( tablen >= linelen ) tablen = linelen-1; /* tab was longer than line */ 13033: tab[min2(tablen,16)] = '\000'; /* null-terminate tab string */ 13034: tablen = strlen(tab); /* reset to actual tab length */ 13035: finalnewline = 0; /* turned off for mimetex version */ 13036: /* --- start with copy of s --- */ 13037: strninit(sbuff,s,3000); /* leave room for \n's and tabs */ 13038: if ( linelen < 1 ) goto end_of_job; /* can't do anything */ 13039: trimwhite(sbuff); /*remove leading/trailing whitespace*/ 13040: strreplace(sbuff,"\n"," ",0); /* remove any original \n's */ 13041: strreplace(sbuff,"\r"," ",0); /* remove any original \r's */ 13042: strreplace(sbuff,"\t"," ",0); /* remove any original \t's */ 13043: strreplace(sbuff,"\f"," ",0); /* remove any original \f's */ 13044: strreplace(sbuff,"\v"," ",0); /* remove any original \v's */ 13045: strreplace(sbuff,"\\\\"," ",0); /* remove any original \\'s */ 13046: /* ------------------------------------------------------------------------- 13047: Insert \\'s and spaces as needed 13048: -------------------------------------------------------------------------- */ 13049: while ( 1 ) { /* till end-of-line */ 13050: /* --- init --- */ 13051: trimwhite(sol); /*remove leading/trailing whitespace*/ 13052: thislen = thistab = 0; /* no chars in current line yet */ 13053: if ( istab && tablen>0 ) { /* need to indent this line */ 13054: strchange(0,sol,tab); /* insert indent at start of line */ 13055: thistab = tablen; } /* line starts with whitespace tab */ 13056: if ( sol == sbuff ) istab = 1-istab; /* flip tab flag after first line */ 13057: sol += thistab; /* skip tab */ 13058: rhslen = strlen(sol); /* remaining right hand side chars */ 13059: if ( rhslen+thistab <= linelen ) break; /* no more \\'s needed */ 13060: if ( 0 && msgfp!=NULL && msglevel >= 99 ) { 13061: fprintf(msgfp,"strwrap> rhslen=%d, sol=\"\"%s\"\"\n",rhslen,sol); 13062: fflush(msgfp); } 13063: /* --- look for last whitespace preceding linelen --- */ 13064: while ( 1 ) { /* till we exceed linelen */ 13065: wordlen = strcspn(sol+thislen," \t\n\r\f\v :;.,"); /*ptr to next white/break*/ 13066: if ( sol[thislen+wordlen] == '\000' ) /* no more whitespace in string */ 13067: goto end_of_job; /* so nothing more we can do */ 13068: if ( thislen+thistab+wordlen >= linelen ) /* next word won't fit */ 13069: if ( thislen > 0 ) break; /* but make sure line has one word */ 13070: thislen += (wordlen+1); } /* ptr past next whitespace char */ 13071: if ( thislen < 1 ) break; /* line will have one too-long word*/ 13072: /*sol[thislen-1] = '\n';*/ /* replace last space with newline */ 13073: /*sol += thislen;*/ /* next line starts after newline */ 13074: iswhite = (isthischar(sol[thislen-1],":;.,")?0:1); /*linebreak on space?*/ 13075: strchange(iswhite,sol+thislen-iswhite,"\\\\"); /* put \\ at end of line */ 13076: sol += (thislen+2-iswhite); /* next line starts after \\ */ 13077: } /* --- end-of-while(1) --- */ 13078: end_of_job: 13079: if ( finalnewline ) strcat(sbuff,"\\\\"); /* replace final newline */ 13080: return ( sbuff ); /* back with clean copy of s */ 13081: } /* --- end-of-function strwrap() --- */ 13082: 13083: 13084: /* ========================================================================== 13085: * Function: strnlower ( s, n ) 13086: * Purpose: lowercase the first n chars of string s 13087: * -------------------------------------------------------------------------- 13088: * Arguments: s (I/O) (char *)pointer to null-terminated string 13089: * whose chars are to be lowercased 13090: * n (I) int containing max number of chars to be 13091: * lowercased (less than n will be lowercased 13092: * if terminating '\000' found first) 13093: * If n<=0 (or n>=strlen(s)) then the entire 13094: * string s will be lowercased 13095: * -------------------------------------------------------------------------- 13096: * Returns: ( char * ) s (always same as input) 13097: * -------------------------------------------------------------------------- 13098: * Notes: o 13099: * ======================================================================= */ 13100: /* --- entry point --- */ 13101: char *strnlower ( char *s, int n ) 13102: { 13103: /* ------------------------------------------------------------------------- 13104: lowercase s 13105: -------------------------------------------------------------------------- */ 13106: char *p = s; /* save s for return to caller */ 13107: if ( !isempty(s) ) /* check for valid input */ 13108: while ( *p != '\000' ) { /* lowercase each char till end */ 13109: *p = tolower(*p); /* lowercase this char */ 13110: if ( n > 0 ) /* only lowercase first n chars */ 13111: if ( --n < 1 ) break; /* quit when we're done */ 13112: p++; } /* proceed to next char */ 13113: return ( s ); /* back to caller with s */ 13114: } /* --- end-of-function strnlower() --- */ 13115: 13116: 13117: /* ========================================================================== 13118: * Function: urlprune ( url, n ) 13119: * Purpose: Prune http://abc.def.ghi.com/etc into abc.def.ghi.com 13120: * (if n=2 only ghi.com is returned, or if n=-1 only "ghi") 13121: * -------------------------------------------------------------------------- 13122: * Arguments: url (I) char * to null-terminated string 13123: * containing url to be pruned 13124: * n (i) int containing number of levels retained 13125: * in pruned url. If n<0 its abs() is used, 13126: * but the topmost level (usually .com, .org, 13127: * etc) is omitted. That is, if n=2 would 13128: * return "ghi.com" then n=-1 returns "ghi". 13129: * n=0 retains all levels. 13130: * -------------------------------------------------------------------------- 13131: * Returns: ( char * ) pointer to (static) null-terminated string 13132: * containing pruned url with the first n 13133: * top-level domain, e.g., for n=2, 13134: * http://abc.def.ghi.com/etc returns ghi.com, 13135: * or an empty string "\000" for any error 13136: * -------------------------------------------------------------------------- 13137: * Notes: o 13138: * ======================================================================= */ 13139: /* --- entry point --- */ 13140: char *urlprune ( char *url, int n ) 13141: { 13142: /* ------------------------------------------------------------------------- 13143: Allocations and Declarations 13144: -------------------------------------------------------------------------- */ 13145: static char pruned[2048]; /* pruned url returned to caller */ 13146: char *purl = /*NULL*/pruned; /* ptr to pruned, init for error */ 13147: char *delim = NULL; /* delimiter separating components */ 13148: char *strnlower(); /* lowercase a string */ 13149: int istruncate = (n<0?1:0); /*true to truncate .com from pruned*/ 13150: int ndots = 0; /* number of dots found in url */ 13151: /* ------------------------------------------------------------------------- 13152: prune the url 13153: -------------------------------------------------------------------------- */ 13154: /* --- first check input --- */ 13155: *pruned = '\000'; /* init for error */ 13156: if ( isempty(url) ) goto end_of_job; /* missing input, so return NULL */ 13157: if ( n < 0 ) n = (-n); /* flip n positive */ 13158: if ( n == 0 ) n = 999; /* retain all levels of url */ 13159: /* --- preprocess url --- */ 13160: strninit(pruned,url,2032); /* copy url to our static buffer */ 13161: strlower(pruned); /* lowercase it and... */ 13162: trimwhite(pruned); /*remove leading/trailing whitespace*/ 13163: /* --- first remove leading http:// --- */ 13164: if ( (delim=strstr(pruned,"://")) != NULL ) /* found http:// or ftp:// etc */ 13165: if ( ((int)(delim-pruned)) <= 8 ) { /* make sure it's a prefix */ 13166: strsqueezep(pruned,delim+3); /* squeeze out leading http:// */ 13167: trimwhite(pruned); } /*remove leading/trailing whitespace*/ 13168: /* --- next remove leading www. --- */ 13169: if ( (delim=strstr(pruned,"www.")) != NULL ) /* found www. */ 13170: if ( ((int)(delim-pruned)) == 0 ) { /* make sure it's the leading chars*/ 13171: strsqueezep(pruned,delim+4); /* squeeze out leading www. */ 13172: trimwhite(pruned); } /*remove leading/trailing whitespace*/ 13173: /* --- finally remove leading / and everything following it --- */ 13174: if ( (delim=strchr(pruned,'/')) != NULL ) /* found first / */ 13175: *delim = '\000'; /* null-terminate url at first / */ 13176: if ( isempty(pruned) ) goto end_of_job; /* nothing left in url */ 13177: /* --- count dots from back of url --- */ 13178: delim = pruned + strlen(pruned); /*ptr to '\000' terminating pruned*/ 13179: while ( ((int)(delim-pruned)) > 0 ) { /* don't back up before first char */ 13180: delim--; /* ptr to preceding character */ 13181: if ( *delim != '.' ) continue; /* not a dot, so keep looking */ 13182: ndots++; /* count another dot found */ 13183: if ( istruncate ) { /* remove trailing .com */ 13184: istruncate = 0; /* don't truncate any more dots */ 13185: *delim = '\000'; /* truncate pruned url */ 13186: ndots = 0; } /* and reset dot count */ 13187: if ( ndots >= n ) { /* have all requested levels */ 13188: strsqueezep(pruned,delim+1); /* squeeze out leading levels */ 13189: break; } /* and we're done */ 13190: } /* --- end-of-while() --- */ 13191: purl = pruned; /*completed okay, return pruned url*/ 13192: end_of_job: 13193: return ( purl ); /* back with pruned url */ 13194: } /* --- end-of-function urlprune() --- */ 13195: 13196: 13197: /* ========================================================================== 13198: * Function: urlncmp ( url1, url2, n ) 13199: * Purpose: Compares the n topmost levels of two urls 13200: * -------------------------------------------------------------------------- 13201: * Arguments: url1 (I) char * to null-terminated string 13202: * containing url to be compared with url2 13203: * url2 (I) char * to null-terminated string 13204: * containing url to be compared with url1 13205: * n (I) int containing number of top levels 13206: * to compare, or 0 to compare them all. 13207: * n<0 compares that many top levels excluding 13208: * the last, i.e., for n=-1, xxx.com and xxx.org 13209: * would be considered a match 13210: * -------------------------------------------------------------------------- 13211: * Returns: ( int ) 1 if url's match, or 13212: * 0 if not. 13213: * -------------------------------------------------------------------------- 13214: * Notes: o 13215: * ======================================================================= */ 13216: /* --- entry point --- */ 13217: int urlncmp ( char *url1, char *url2, int n ) 13218: { 13219: /* ------------------------------------------------------------------------- 13220: Allocations and Declarations 13221: -------------------------------------------------------------------------- */ 13222: char *urlprune(), *prune=NULL, /* prune url's */ 13223: prune1[4096], prune2[4096]; /* pruned copies of url1,url2 */ 13224: int ismatch = 0; /* true if url's match */ 13225: /* ------------------------------------------------------------------------- 13226: prune url's and compare the pruned results 13227: -------------------------------------------------------------------------- */ 13228: /* --- check input --- */ 13229: if ( isempty(url1) /*make sure both url1,url2 supplied*/ 13230: || isempty(url2) ) goto end_of_job; /* missing input, so return 0 */ 13231: /* --- prune url's --- */ 13232: prune = urlprune(url1,n); /* ptr to pruned version of url1 */ 13233: if ( isempty(prune) ) goto end_of_job; /* some problem with url1 */ 13234: strninit(prune1,prune,4064); /* local copy of pruned url1 */ 13235: prune = urlprune(url2,n); /* ptr to pruned version of url2 */ 13236: if ( isempty(prune) ) goto end_of_job; /* some problem with url2 */ 13237: strninit(prune2,prune,4064); /* local copy of pruned url2 */ 13238: /* --- compare pruned url's --- */ 13239: if ( strcmp(prune1,prune2) == 0 ) /* pruned url's are identical */ 13240: ismatch = 1; /* signal match to caller */ 13241: end_of_job: 13242: return ( ismatch ); /*back with #matching url components*/ 13243: } /* --- end-of-function urlncmp() --- */ 13244: 13245: 13246: /* ========================================================================== 13247: * Function: dbltoa ( dblval, npts ) 13248: * Purpose: Converts double to ascii, in financial format 13249: * (e.g., comma-separated and negatives enclosed in ()'s). 13250: * ------------------------------------------------------------------------- 13251: * Arguments: dblval (I) double containing value to be converted. 13252: * npts (I) int containing #places after decimal point 13253: * to be displayed in returned string. 13254: * Returns: ( char * ) null-terminated string containing 13255: * double converted to financial format. 13256: * ------------------------------------------------------------------------- 13257: * Notes: o 13258: * ======================================================================= */ 13259: /* --- entry point --- */ 13260: char *dbltoa ( double dblval, int npts ) 13261: /* double dblval; 13262: int npts; */ 13263: { 13264: /* ------------------------------------------------------------------------- 13265: Allocations and Declarations 13266: ------------------------------------------------------------------------- */ 13267: static char finval[256]; /* buffer returned to caller */ 13268: static char digittbl[32]="0123456789*"; /* table of ascii decimal digits */ 13269: char *finptr = finval; /* ptr to next char being converted*/ 13270: double floor(); /* integer which is glb(double) */ 13271: double dbldigit; /* to shift out digits from dblval */ 13272: int digit; /* one digit from dblval */ 13273: int isneg = 0; /* reset true if dblval negative */ 13274: int ifrac = 0; /* npts fractional digits of dblval*/ 13275: char digits[64]; int ndigits=0; /* all the digits [0]=least signif */ 13276: /* ------------------------------------------------------------------------- 13277: Check sign 13278: ------------------------------------------------------------------------- */ 13279: if ( dblval < 0.0 ) /* got a negative value to convert */ 13280: { isneg=1; dblval=(-dblval); } /* set flag and make it positive */ 13281: /* ------------------------------------------------------------------------- 13282: Get fractional part of dblval if required 13283: ------------------------------------------------------------------------- */ 13284: if ( npts > 0 ) 13285: { int ipts = npts; /* loop index */ 13286: dbldigit = dblval-floor(dblval); /* fractional part as double */ 13287: digit = 1; /* check if rounded frac > 1 */ 13288: while ( --ipts >= 0 ) /* count down */ 13289: { dbldigit *= 10.0; /* shift left one digit at a time */ 13290: digit *= 10; } /* and keep max up-to-date */ 13291: ifrac = (int)(dbldigit + 0.5); /* store fractional part as integer*/ 13292: if ( ifrac >= digit ) /* round to next whole number */ 13293: { dblval++; ifrac=0; } /* bump val, reset frac to zero */ 13294: } /* --- end-of-if(npts>0) --- */ 13295: else dblval += 0.5; /* no frac, round to nearest whole */ 13296: /* ------------------------------------------------------------------------- 13297: Get whole digits 13298: ------------------------------------------------------------------------- */ 13299: dblval = floor(dblval); /* get rid of fractional part */ 13300: while ( dblval > 0.0 ) /* still have data digits remaining*/ 13301: { dbldigit = floor(dblval/10.0); /* shift out next digit */ 13302: digit = (int)(dblval - 10.0*dbldigit + 0.01); /* least signif digit */ 13303: if ( digit<0 || digit>9 ) digit=10; /* index check */ 13304: digits[ndigits++] = digittbl[digit]; /* store ascii digit */ 13305: dblval = dbldigit; } /* ready for next digit */ 13306: if ( ndigits < 1 ) digits[ndigits++] = '0'; /* store a single '0' for 0.0 */ 13307: /* ------------------------------------------------------------------------- 13308: Format whole part from digits[] array 13309: ------------------------------------------------------------------------- */ 13310: if ( isneg ) *finptr++ = '('; /* leading paren for negative value*/ 13311: for ( digit=ndigits-1; digit>=0; digit-- ) /* start with most significant */ 13312: { *finptr++ = digits[digit]; /* store digit */ 13313: if ( digit>0 && digit%3==0 ) /* need a comma */ 13314: *finptr++ = ','; } /* put in separating comma */ 13315: /* ------------------------------------------------------------------------- 13316: Format fractional part using ifrac 13317: ------------------------------------------------------------------------- */ 13318: if ( npts > 0 ) 13319: { *finptr++ = '.'; /* start with decimal point */ 13320: sprintf(finptr,"%0*d",npts,ifrac); /* convert to string */ 13321: finptr += npts; } /* bump ptr past fractional digits */ 13322: /* ------------------------------------------------------------------------- 13323: End-of-Job 13324: ------------------------------------------------------------------------- */ 13325: if ( isneg ) *finptr++ = ')'; /*trailing paren for negative value*/ 13326: *finptr = '\000'; /* null-terminate converted double */ 13327: return ( finval ); /* converted double back to caller */ 13328: } /* --- end-of-function dbltoa() --- */ 13329: 13330: 13331: /* ========================================================================== 13332: * Function: aalowpass ( rp, bytemap, grayscale ) 13333: * Purpose: calculates a lowpass anti-aliased bytemap 13334: * for rp->bitmap, with each byte 0...grayscale-1 13335: * -------------------------------------------------------------------------- 13336: * Arguments: rp (I) raster * to raster whose bitmap 13337: * is to be anti-aliased 13338: * bytemap (O) intbyte * to bytemap, calculated 13339: * by applying lowpass filter to rp->bitmap, 13340: * and returned (as you'd expect) in 1-to-1 13341: * addressing correspondence with rp->bitmap 13342: * grayscale (I) int containing number of grayscales 13343: * to be calculated, 0...grayscale-1 13344: * (should typically be given as 256) 13345: * -------------------------------------------------------------------------- 13346: * Returns: ( int ) 1=success, 0=any error 13347: * -------------------------------------------------------------------------- 13348: * Notes: o If the center point of the box being averaged is black, 13349: * then the entire "average" is forced black (grayscale-1) 13350: * regardless of the surrounding points. This is my attempt 13351: * to avoid a "washed-out" appearance of thin (one-pixel-wide) 13352: * lines, which would otherwise turn from black to a gray shade. 13353: * o Also, while the weights for neighbor points are fixed, 13354: * you may adjust the center point weight on the compile line. 13355: * A higher weight sharpens the resulting anti-aliased image; 13356: * lower weights blur it out more (but keep the "center" black 13357: * as per the preceding note). 13358: * ======================================================================= */ 13359: /* --- entry point --- */ 13360: int aalowpass (raster *rp, intbyte *bytemap, int grayscale) 13361: { 13362: /* ------------------------------------------------------------------------- 13363: Allocations and Declarations 13364: -------------------------------------------------------------------------- */ 13365: int status = 1; /* 1=success, 0=failure to caller */ 13366: pixbyte *bitmap= (rp==NULL?NULL:rp->pixmap); /*local rp->pixmap ptr*/ 13367: int irow=0, icol=0; /* rp->height, rp->width indexes */ 13368: int weights[9] = { 1,3,1, 3,0,3, 1,3,1 }; /* matrix of weights */ 13369: int adjindex[9]= { 0,1,2, 7,-1,3, 6,5,4 }; /*clockwise from upper-left*/ 13370: int totwts = 0; /* sum of all weights in matrix */ 13371: int isforceavg = 1, /*force avg black if center black?*/ 13372: isminmaxwts = 1, /*use wts or #pts for min/max test */ 13373: blackscale = 0; /*(grayscale+1)/4;*/ /*force black if wgted avg>bs */ 13374: /* ------------------------------------------------------------------------- 13375: Initialization 13376: -------------------------------------------------------------------------- */ 13377: /* --- calculate total weights --- */ 13378: weights[4]= centerwt; /* weight for center point */ 13379: weights[1]= weights[3]= weights[5]= weights[7]= adjacentwt; /*adjacent pts*/ 13380: totwts = centerwt + 4*(1+adjacentwt); /* tot is center plus neighbors */ 13381: /* ------------------------------------------------------------------------- 13382: Calculate bytemap as 9-point weighted average over bitmap 13383: -------------------------------------------------------------------------- */ 13384: for ( irow=0; irow<rp->height; irow++ ) 13385: for ( icol=0; icol<rp->width; icol++ ) 13386: { 13387: int ipixel = icol + irow*(rp->width); /* center pixel index */ 13388: int jrow=0, jcol=0, /* box around ipixel */ 13389: bitval = 0, /* value of bit/pixel at jrow,jcol */ 13390: iscenter = 0, /* set true if center pixel black */ 13391: nadjacent=0, wadjacent=0, /* #adjacent black pixels, their wts*/ 13392: ngaps = 0, /* #gaps in 8 pixels around center */ 13393: iwt=(-1), sumwts=0; /* weights index, sum in-bound wts */ 13394: char adjmatrix[8]; /* adjacency "matrix" */ 13395: memset(adjmatrix,0,8); /* zero out adjacency matrix */ 13396: bytemap[ipixel] = 0; /* init pixel white */ 13397: /*--- for ipixel at irow,icol, get weighted average of adjacent pixels ---*/ 13398: for ( jrow=irow-1; jrow<=irow+1; jrow++ ) /* jrow = irow-1...irow+1 */ 13399: for ( jcol=icol-1; jcol<=icol+1; jcol++ ) /* jcol = icol-1...icol+1 */ 13400: { 13401: int jpixel = jcol + jrow*(rp->width); /* averaging index */ 13402: iwt++; /*always bump weight index*/ 13403: if ( jrow<0 || jrow>=rp->height /* if row out pf bounds */ 13404: || jcol<0 || jcol>=rp->width ) /* or col out of bounds */ 13405: continue; /* ignore this point */ 13406: bitval = (int)getlongbit(bitmap,jpixel); /* value of bit at jrow,jcol */ 13407: if ( bitval ) /* this is a black pixel */ 13408: { if ( jrow==irow && jcol==icol ) /* and this is center point */ 13409: iscenter = 1; /* set flag for center point black */ 13410: else /* adjacent point black */ 13411: { nadjacent++; /* bump adjacent black count */ 13412: adjmatrix[adjindex[iwt]] = 1; } /*set "bit" in adjacency matrix*/ 13413: wadjacent += weights[iwt]; } /* sum weights for black pixels */ 13414: sumwts += weights[iwt]; /* and sum weights for all pixels */ 13415: } /* --- end-of-for(jrow,jcol) --- */ 13416: /* --- count gaps --- */ 13417: ngaps = (adjmatrix[7]!=adjmatrix[0]?1:0); /* init count */ 13418: for ( iwt=0; iwt<7; iwt++ ) /* clockwise around adjacency */ 13419: if ( adjmatrix[iwt] != adjmatrix[iwt+1] ) ngaps++; /* black/white flip */ 13420: ngaps /= 2; /*each gap has 2 black/white flips*/ 13421: /* --- anti-alias pixel, but leave it black if it was already black --- */ 13422: if ( isforceavg && iscenter ) /* force avg if center point black */ 13423: bytemap[ipixel] = grayscale-1; /* so force grayscale-1=black */ 13424: else /* center point not black */ 13425: if ( ngaps <= 2 ) /*don't darken checkerboarded pixel*/ 13426: { bytemap[ipixel] = /* 0=white ... grayscale-1=black */ 13427: ((totwts/2 - 1) + (grayscale-1)*wadjacent)/totwts; /* not /sumwts; */ 13428: if ( blackscale > 0 /* blackscale kludge turned on */ 13429: && bytemap[ipixel] > blackscale ) /* weighted avg > blackscale */ 13430: bytemap[ipixel] = grayscale-1; } /* so force it entirely black */ 13431: /*--- only anti-alias pixels whose adjacent pixels fall within bounds ---*/ 13432: if ( !iscenter ) { /* apply min/maxadjacent test */ 13433: if ( isminmaxwts ) /* min/max refer to adjacent weights*/ 13434: { if ( wadjacent < minadjacent /* wts of adjacent points too low */ 13435: || wadjacent > maxadjacent ) /* or too high */ 13436: bytemap[ipixel] = 0; } /* so leave point white */ 13437: else /* min/max refer to #adjacent points*/ 13438: { if ( nadjacent < minadjacent /* too few adjacent points black */ 13439: || nadjacent > maxadjacent ) /* or too many */ 13440: bytemap[ipixel] = 0; } } /* so leave point white */ 13441: } /* --- end-of-for(irow,icol) --- */ 13442: /* ------------------------------------------------------------------------- 13443: Back to caller with gray-scale anti-aliased bytemap 13444: -------------------------------------------------------------------------- */ 13445: /*end_of_job:*/ 13446: return ( status ); 13447: } /* --- end-of-function aalowpass() --- */ 13448: 13449: 13450: /* ========================================================================== 13451: * Function: aapnm ( rp, bytemap, grayscale ) 13452: * Purpose: calculates a lowpass anti-aliased bytemap 13453: * for rp->bitmap, with each byte 0...grayscale-1, 13454: * based on the pnmalias.c algorithm 13455: * -------------------------------------------------------------------------- 13456: * Arguments: rp (I) raster * to raster whose bitmap 13457: * is to be anti-aliased 13458: * bytemap (O) intbyte * to bytemap, calculated 13459: * by applying pnm-based filter to rp->bitmap, 13460: * and returned (as you'd expect) in 1-to-1 13461: * addressing correspondence with rp->bitmap 13462: * grayscale (I) int containing number of grayscales 13463: * to be calculated, 0...grayscale-1 13464: * (should typically be given as 256) 13465: * -------------------------------------------------------------------------- 13466: * Returns: ( int ) 1=success, 0=any error 13467: * -------------------------------------------------------------------------- 13468: * Notes: o Based on the pnmalias.c algorithm in the netpbm package 13469: * on sourceforge. 13470: * ======================================================================= */ 13471: /* --- entry point --- */ 13472: int aapnm (raster *rp, intbyte *bytemap, int grayscale) 13473: { 13474: /* ------------------------------------------------------------------------- 13475: Allocations and Declarations 13476: -------------------------------------------------------------------------- */ 13477: pixbyte *bitmap = rp->pixmap; /* local rp->pixmap ptr */ 13478: int width=rp->width, height=rp->height, /* width, height of raster */ 13479: icol = 0, irow = 0, /* width, height indexes */ 13480: imap = (-1); /* pixel index = icol + irow*width */ 13481: int bgbitval=0, fgbitval=1; /* background, foreground bitval */ 13482: int isfirstaa = 1; /*debugging switch signals 1st pixel*/ 13483: #if 0 13484: int totwts=12, wts[9]={1,1,1, 1,4,1, 1,1,1}; /* pnmalias default wts */ 13485: int totwts=16, wts[9]={1,2,1, 2,4,2, 1,2,1}; /* weights */ 13486: #endif 13487: int totwts=18, wts[9]={1,2,1, 2,6,2, 1,2,1}; /* pnmalias default wts */ 13488: int isresetparams = 1, /* true to set antialiasing params */ 13489: isfgalias = 1, /* true to antialias fg bits */ 13490: isfgonly = 0, /* true to only antialias fg bits */ 13491: isbgalias = 0, /* true to antialias bg bits */ 13492: isbgonly = 0; /* true to only antialias bg bits */ 13493: /* ------------------------------------------------------------------------- 13494: Initialization 13495: -------------------------------------------------------------------------- */ 13496: /* --- check for bold light --- */ 13497: if ( 0 ) 13498: { if ( weightnum > 2 ) { isbgalias=1; } /* simulate bold */ 13499: if ( weightnum < 1 ) { isbgonly=1; isfgalias=0; } } /* simulate light */ 13500: /* --- reset wts[], etc, and calculate total weights --- */ 13501: if ( isresetparams ) /* wts[], etc taken from params */ 13502: { int iwt=0; /* wts[iwt] index */ 13503: wts[4]= centerwt; /* weight for center point */ 13504: wts[1]=wts[3]=wts[5]=wts[7] = adjacentwt; /* and adjacent points */ 13505: wts[0]=wts[2]=wts[6]=wts[8] = cornerwt; /* and corner points */ 13506: for ( totwts=0,iwt=0; iwt<9; iwt++ ) totwts += wts[iwt]; /* sum wts */ 13507: isfgalias = fgalias; /* set isfgalias */ 13508: isfgonly = fgonly; /* set isfgonly */ 13509: isbgalias = bgalias; /* set isbgalias */ 13510: isbgonly = bgonly; } /* set isbgonly */ 13511: /* ------------------------------------------------------------------------- 13512: Calculate bytemap as 9-point weighted average over bitmap 13513: -------------------------------------------------------------------------- */ 13514: for ( irow=0; irow<height; irow++ ) 13515: for ( icol=0; icol<width; icol++ ) 13516: { 13517: /* --- local allocations and declarations --- */ 13518: int bitval=0, /* value of rp bit at irow,icol */ 13519: nnbitval=0, nebitval=0, eebitval=0, sebitval=0, /*adjacent vals*/ 13520: ssbitval=0, swbitval=0, wwbitval=0, nwbitval=0; /*compass pt names*/ 13521: int isbgedge=0, isfgedge=0; /*does pixel border a bg or fg edge*/ 13522: int aabyteval=0; /* antialiased (or unchanged) value*/ 13523: /* --- bump imap index and get center bit value --- */ 13524: imap++; /* imap = icol + irow*width */ 13525: bitval = getlongbit(bitmap,imap); /* value of rp input bit at imap */ 13526: aabyteval = (intbyte)(bitval==bgbitval?0:grayscale-1); /* default aa val */ 13527: bytemap[imap] = (intbyte)(aabyteval); /* init antialiased pixel */ 13528: /* --- check if we're antialiasing this pixel --- */ 13529: if ( (isbgonly && bitval==fgbitval) /* only antialias background bit */ 13530: || (isfgonly && bitval==bgbitval) ) /* only antialias foreground bit */ 13531: continue; /* leave default and do next bit */ 13532: /* --- get surrounding bits --- */ 13533: if ( irow > 0 ) /* nn (north) bit available */ 13534: nnbitval = getlongbit(bitmap,imap-width); /* nn bit value */ 13535: if ( irow < height-1 ) /* ss (south) bit available */ 13536: ssbitval = getlongbit(bitmap,imap+width); /* ss bit value */ 13537: if ( icol > 0 ) /* ww (west) bit available */ 13538: { wwbitval = getlongbit(bitmap,imap-1); /* ww bit value */ 13539: if ( irow > 0 ) /* nw bit available */ 13540: nwbitval = getlongbit(bitmap,imap-width-1); /* nw bit value */ 13541: if ( irow < height-1 ) /* sw bit available */ 13542: swbitval = getlongbit(bitmap,imap+width-1); } /* sw bit value */ 13543: if ( icol < width-1 ) /* ee (east) bit available */ 13544: { eebitval = getlongbit(bitmap,imap+1); /* ee bit value */ 13545: if ( irow > 0 ) /* ne bit available */ 13546: nebitval = getlongbit(bitmap,imap-width+1); /* ne bit value */ 13547: if ( irow < height-1 ) /* se bit available */ 13548: sebitval = getlongbit(bitmap,imap+width+1); } /* se bit value */ 13549: /* --- check for edges --- */ 13550: isbgedge = /* current pixel borders a bg edge */ 13551: (nnbitval==bgbitval && eebitval==bgbitval) || /*upper-right edge*/ 13552: (eebitval==bgbitval && ssbitval==bgbitval) || /*lower-right edge*/ 13553: (ssbitval==bgbitval && wwbitval==bgbitval) || /*lower-left edge*/ 13554: (wwbitval==bgbitval && nnbitval==bgbitval) ; /*upper-left edge*/ 13555: isfgedge = /* current pixel borders an fg edge*/ 13556: (nnbitval==fgbitval && eebitval==fgbitval) || /*upper-right edge*/ 13557: (eebitval==fgbitval && ssbitval==fgbitval) || /*lower-right edge*/ 13558: (ssbitval==fgbitval && wwbitval==fgbitval) || /*lower-left edge*/ 13559: (wwbitval==fgbitval && nnbitval==fgbitval) ; /*upper-left edge*/ 13560: /* ---check top/bot left/right edges for corners (added by j.forkosh)--- */ 13561: if ( 1 ) { /* true to perform test */ 13562: int isbghorz=0, isfghorz=0, isbgvert=0, isfgvert=0; /* horz/vert edges */ 13563: isbghorz = /* top or bottom edge is all bg */ 13564: (nwbitval+nnbitval+nebitval == 3*bgbitval) || /* top edge bg */ 13565: (swbitval+ssbitval+sebitval == 3*bgbitval) ; /* bottom edge bg */ 13566: isfghorz = /* top or bottom edge is all fg */ 13567: (nwbitval+nnbitval+nebitval == 3*fgbitval) || /* top edge fg */ 13568: (swbitval+ssbitval+sebitval == 3*fgbitval) ; /* bottom edge fg */ 13569: isbgvert = /* left or right edge is all bg */ 13570: (nwbitval+wwbitval+swbitval == 3*bgbitval) || /* left edge bg */ 13571: (nebitval+eebitval+sebitval == 3*bgbitval) ; /* right edge bg */ 13572: isfgvert = /* left or right edge is all bg */ 13573: (nwbitval+wwbitval+swbitval == 3*fgbitval) || /* left edge fg */ 13574: (nebitval+eebitval+sebitval == 3*fgbitval) ; /* right edge fg */ 13575: if ( (isbghorz && isbgvert && (bitval==fgbitval)) /* we're at an...*/ 13576: || (isfghorz && isfgvert && (bitval==bgbitval)) ) /*...inside corner */ 13577: continue; /* don't antialias */ 13578: } /* --- end-of-if(1) --- */ 13579: /* --- check #gaps for checkerboard (added by j.forkosh) --- */ 13580: if ( 0 ) { /* true to perform test */ 13581: int ngaps=0, mingaps=1,maxgaps=2; /* count #fg/bg flips (max=4 noop) */ 13582: if ( nwbitval!=nnbitval ) ngaps++; /* upper-left =? upper */ 13583: if ( nnbitval!=nebitval ) ngaps++; /* upper =? upper-right */ 13584: if ( nebitval!=eebitval ) ngaps++; /* upper-right =? right */ 13585: if ( eebitval!=sebitval ) ngaps++; /* right =? lower-right */ 13586: if ( sebitval!=ssbitval ) ngaps++; /* lower-right =? lower */ 13587: if ( ssbitval!=swbitval ) ngaps++; /* lower =? lower-left */ 13588: if ( swbitval!=wwbitval ) ngaps++; /* lower-left =? left */ 13589: if ( wwbitval!=nwbitval ) ngaps++; /* left =? upper-left */ 13590: if ( ngaps > 0 ) ngaps /= 2; /* each gap has 2 bg/fg flips */ 13591: if ( ngaps<mingaps || ngaps>maxgaps ) continue; 13592: } /* --- end-of-if(1) --- */ 13593: /* --- antialias if necessary --- */ 13594: if ( (isbgalias && isbgedge) /* alias pixel surrounding bg */ 13595: || (isfgalias && isfgedge) /* alias pixel surrounding fg */ 13596: || (isbgedge && isfgedge) ) /* neighboring fg and bg pixel */ 13597: { 13598: int aasumval = /* sum wts[]*bitmap[] */ 13599: wts[0]*nwbitval + wts[1]*nnbitval + wts[2]*nebitval + 13600: wts[3]*wwbitval + wts[4]*bitval + wts[5]*eebitval + 13601: wts[6]*swbitval + wts[7]*ssbitval + wts[8]*sebitval ; 13602: double aawtval = ((double)aasumval)/((double)totwts); /* weighted val */ 13603: aabyteval= (int)(((double)(grayscale-1))*aawtval+0.5); /*0...grayscale-1*/ 13604: bytemap[imap] = (intbyte)(aabyteval); /* set antialiased pixel */ 13605: if ( msglevel>=99 && msgfp!=NULL ) { fprintf(msgfp, /*diagnostic output*/ 13606: "%s> irow,icol,imap=%d,%d,%d aawtval=%.4f aabyteval=%d\n", 13607: (isfirstaa?"aapnm algorithm":"aapnm"), 13608: irow,icol,imap, aawtval,aabyteval); 13609: isfirstaa = 0; } 13610: } /* --- end-of-if(isedge) --- */ 13611: } /* --- end-of-for(irow,icol) --- */ 13612: /* ------------------------------------------------------------------------- 13613: Back to caller with gray-scale anti-aliased bytemap 13614: -------------------------------------------------------------------------- */ 13615: /*end_of_job:*/ 13616: return ( 1 ); 13617: } /* --- end-of-function aapnm() --- */ 13618: 13619: 13620: /* ========================================================================== 13621: * Function: aapnmlookup ( rp, bytemap, grayscale ) 13622: * Purpose: calculates a lowpass anti-aliased bytemap 13623: * for rp->bitmap, with each byte 0...grayscale-1, 13624: * based on the pnmalias.c algorithm. 13625: * This version uses aagridnum() and aapatternnum() lookups 13626: * to interpret 3x3 lowpass pixel grids. 13627: * -------------------------------------------------------------------------- 13628: * Arguments: rp (I) raster * to raster whose bitmap 13629: * is to be anti-aliased 13630: * bytemap (O) intbyte * to bytemap, calculated 13631: * by applying pnm-based filter to rp->bitmap, 13632: * and returned (as you'd expect) in 1-to-1 13633: * addressing correspondence with rp->bitmap 13634: * grayscale (I) int containing number of grayscales 13635: * to be calculated, 0...grayscale-1 13636: * (should typically be given as 256) 13637: * -------------------------------------------------------------------------- 13638: * Returns: ( int ) 1=success, 0=any error 13639: * -------------------------------------------------------------------------- 13640: * Notes: o Based on the pnmalias.c algorithm in the netpbm package 13641: * on sourceforge. 13642: * o This version uses aagridnum() and aapatternnum() lookups 13643: * to interpret 3x3 lowpass pixel grids. 13644: * ======================================================================= */ 13645: /* --- entry point --- */ 13646: int aapnmlookup (raster *rp, intbyte *bytemap, int grayscale) 13647: { 13648: /* ------------------------------------------------------------------------- 13649: Allocations and Declarations 13650: -------------------------------------------------------------------------- */ 13651: int width=rp->width, height=rp->height, /* width, height of raster */ 13652: icol = 0, irow = 0, /* width, height indexes */ 13653: imap = (-1); /* pixel index = icol + irow*width */ 13654: int bgbitval=0, fgbitval=1; /* background, foreground bitval */ 13655: int isfirstaa = 1; /*debugging switch signals 1st pixel*/ 13656: int aacenterwt=centerwt, aaadjacentwt=adjacentwt, aacornerwt=cornerwt, 13657: totwts = centerwt + 4*(adjacentwt+cornerwt); /*pnmalias default wts*/ 13658: int isfgalias = fgalias, /*(1) true to antialias fg bits */ 13659: isfgonly = fgonly, /*(0) true to only antialias fg bits*/ 13660: isbgalias = bgalias, /*(0) true to antialias bg bits */ 13661: isbgonly = bgonly; /*(0) true to only antialias bg bits*/ 13662: int gridnum=(-1), aagridnum(), /* grid# for 3x3 grid at irow,icol */ 13663: patternum=(-1), aapatternnum(); /*pattern#, 1-51, for input gridnum*/ 13664: int aapatterns(); /* to antialias special patterns */ 13665: /* --- 13666: * pattern number data 13667: * ------------------- */ 13668: /* --- number of adjacent fg pixels set in pattern --- */ 13669: static int nadjacents[] = { -1, /* #adjacent fg pixels for pattern */ 13670: 0, 4, 0, 1, 4, 3, 1, 0, 1, 0, /* 1-10 */ 13671: 2, 2, 3, 4, 3, 4, 2, 2, 1, 2, /* 11-20 */ 13672: 1, 2, 1, 2, 0, 1, 3, 2, 3, 2, /* 21-30 */ 13673: 3, 2, 3, 2, 4, 3, 1, 2, 2, 2, /* 31-40 */ 13674: 2, 1, 2, 2, 3, 0, 3, 2, 2, 1, 4, /* 41-51 */ 13675: -1 } ; /* --- end-of-nadjacents[] --- */ 13676: /* --- number of corner fg pixels set in pattern --- */ 13677: static int ncorners[] = { -1, /* #corner fg pixels for pattern */ 13678: 0, 4, 1, 0, 3, 4, 1, 2, 1, 2, /* 1-10 */ 13679: 0, 0, 3, 2, 3, 2, 4, 4, 2, 1, /* 11-20 */ 13680: 2, 1, 2, 1, 3, 2, 0, 1, 2, 3, /* 21-30 */ 13681: 2, 3, 2, 3, 1, 2, 4, 3, 2, 2, /* 31-40 */ 13682: 2, 3, 2, 2, 1, 4, 1, 2, 2, 3, 0, /* 41-51 */ 13683: -1 } ; /* --- end-of-ncorners[] --- */ 13684: /* --- 0,1,2=pattern contains horizontal bg,fg,both edge; -1=no edge --- */ 13685: static int horzedges[] = { -1, /* 0,1,2 = horz bg,fg,both edge */ 13686: 0, 1, 0, 0, 1, 1, 0, 0, 0, -1, /* 1-10 */ 13687: 0, -1, 1, 1, 1, -1, 1, -1, 2, 0, /* 11-20 */ 13688: -1, -1, -1, 0, -1, -1, -1, -1, 2, 1, /* 21-30 */ 13689: -1, -1, -1, 1, -1, -1, -1, -1, 2, -1, /* 31-40 */ 13690: -1, 1, 1, -1, -1, -1, 0, 0, -1, -1, -1, /* 41-51 */ 13691: -1 } ; /* --- end-of-horzedges[] --- */ 13692: /* --- 0,1,2=pattern contains vertical bg,fg,both edge; -1=no edge --- */ 13693: static int vertedges[] = { -1, /* 0,1,2 = vert bg,fg,both edge */ 13694: 0, 1, 0, 0, 1, 1, 0, -1, -1, -1, /* 1-10 */ 13695: 0, 0, 1, -1, -1, -1, 1, 1, -1, -1, /* 11-20 */ 13696: -1, 0, 0, 0, -1, -1, 0, -1, -1, -1, /* 21-30 */ 13697: -1, 1, 1, 1, -1, -1, 1, -1, -1, -1, /* 31-40 */ 13698: -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 41-51 */ 13699: -1 } ; /* --- end-of-vertedges[] --- */ 13700: /* --- 0,1,2=pattern contains diagonal bg,fg,both edge; -1=no edge --- */ 13701: static int diagedges[] = { -1, /* 0,1,2 = diag bg,fg,both edge */ 13702: 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, /* 1-10 */ 13703: 2, -1, 1, 1, 1, 1, 1, -1, 0, 2, /* 11-20 */ 13704: 0, -1, 0, 2, 0, -1, 1, 1, 1, 1, /* 21-30 */ 13705: 1, -1, 1, 2, 1, 1, -1, 1, 2, -1, /* 31-40 */ 13706: 1, 0, -1, 2, 1, 0, 1, -1, 1, -1, 1, /* 41-51 */ 13707: -1 } ; /* --- end-of-diagedges[] --- */ 13708: /* ------------------------------------------------------------------------- 13709: Calculate bytemap as 9-point weighted average over bitmap 13710: -------------------------------------------------------------------------- */ 13711: for ( irow=0; irow<height; irow++ ) 13712: for ( icol=0; icol<width; icol++ ) 13713: { 13714: /* --- local allocations and declarations --- */ 13715: int bitval=0, /* value of rp bit at irow,icol */ 13716: isbgdiag=0, isfgdiag=0, /*does pixel border a bg or fg edge*/ 13717: aabyteval=0; /* antialiased (or unchanged) value*/ 13718: /* --- get gridnum and center bit value, init aabyteval --- */ 13719: imap++; /* first set imap=icol + irow*width*/ 13720: gridnum = aagridnum(rp,irow,icol); /*grid# coding 3x3 grid at irow,icol*/ 13721: bitval = (gridnum&1); /* center bit set if gridnum odd */ 13722: aabyteval = (intbyte)(bitval==bgbitval?0:grayscale-1); /* default aa val */ 13723: bytemap[imap] = (intbyte)(aabyteval); /* init antialiased pixel */ 13724: if ( gridnum<0 || gridnum>511 ) continue; /* gridnum out of bounds*/ 13725: /* --- check if we're antialiasing this pixel --- */ 13726: if ( (isbgonly && bitval==fgbitval) /* only antialias background bit */ 13727: || (isfgonly && bitval==bgbitval) ) /* only antialias foreground bit */ 13728: continue; /* leave default and do next bit */ 13729: /* --- look up pattern number, 1-51, corresponding to input gridnum --- */ 13730: patternum = aapatternnum(gridnum); /* look up pattern number */ 13731: if ( patternum<1 || patternum>51 ) continue; /* some internal error */ 13732: /* --- special pattern number processing --- */ 13733: if ( (aabyteval = aapatterns(rp,irow,icol,gridnum,patternum,grayscale)) 13734: >= 0 ) { /* special processing for pattern */ 13735: bytemap[imap] = (intbyte)(aabyteval); /* set antialiased pixel */ 13736: continue; } /* and continue with next pixel */ 13737: /* --- check for diagonal edges --- */ 13738: isbgdiag = ( diagedges[patternum]==2 || /*current pixel borders a bg edge*/ 13739: diagedges[patternum]==0 ); 13740: isfgdiag = ( diagedges[patternum]==2 || /*current pixel borders a fg edge*/ 13741: diagedges[patternum]==1 ); 13742: /* ---check top/bot left/right edges for corners (added by j.forkosh)--- */ 13743: if ( 1 ) { /* true to perform test */ 13744: int isbghorz=0, isfghorz=0, isbgvert=0, isfgvert=0, /* horz/vert edges */ 13745: horzedge=horzedges[patternum], vertedge=vertedges[patternum]; 13746: isbghorz = (horzedge==2||horzedge==0); /* top or bottom edge is all bg */ 13747: isfghorz = (horzedge==2||horzedge==1); /* top or bottom edge is all fg */ 13748: isbgvert = (vertedge==2||vertedge==0); /* left or right edge is all bg */ 13749: isfgvert = (vertedge==2||vertedge==1); /* left or right edge is all fg */ 13750: if ( (isbghorz && isbgvert && (bitval==fgbitval)) /* we're at an...*/ 13751: || (isfghorz && isfgvert && (bitval==bgbitval)) ) /*...inside corner */ 13752: continue; /* don't antialias */ 13753: } /* --- end-of-if(1) --- */ 13754: #if 0 13755: /* --- check #gaps for checkerboard (added by j.forkosh) --- */ 13756: if ( 0 ) { /* true to perform test */ 13757: int ngaps=0, mingaps=1,maxgaps=2; /* count #fg/bg flips (max=4 noop) */ 13758: if ( nwbitval!=nnbitval ) ngaps++; /* upper-left =? upper */ 13759: if ( nnbitval!=nebitval ) ngaps++; /* upper =? upper-right */ 13760: if ( nebitval!=eebitval ) ngaps++; /* upper-right =? right */ 13761: if ( eebitval!=sebitval ) ngaps++; /* right =? lower-right */ 13762: if ( sebitval!=ssbitval ) ngaps++; /* lower-right =? lower */ 13763: if ( ssbitval!=swbitval ) ngaps++; /* lower =? lower-left */ 13764: if ( swbitval!=wwbitval ) ngaps++; /* lower-left =? left */ 13765: if ( wwbitval!=nwbitval ) ngaps++; /* left =? upper-left */ 13766: if ( ngaps > 0 ) ngaps /= 2; /* each gap has 2 bg/fg flips */ 13767: if ( ngaps<mingaps || ngaps>maxgaps ) continue; 13768: } /* --- end-of-if(1) --- */ 13769: #endif 13770: /* --- antialias if necessary --- */ 13771: if ( (isbgalias && isbgdiag) /* alias pixel surrounding bg */ 13772: || (isfgalias && isfgdiag) /* alias pixel surrounding fg */ 13773: || (isbgdiag && isfgdiag) ) /* neighboring fg and bg pixel */ 13774: { 13775: int aasumval = /* sum wts[]*bitmap[] */ 13776: aacenterwt*bitval + /* apply centerwt to center pixel */ 13777: aaadjacentwt*nadjacents[patternum] + /* similarly for adjacents */ 13778: aacornerwt*ncorners[patternum]; /* and corners */ 13779: double aawtval = ((double)aasumval)/((double)totwts); /* weighted val */ 13780: aabyteval= (int)(((double)(grayscale-1))*aawtval+0.5); /*0...grayscale-1*/ 13781: bytemap[imap] = (intbyte)(aabyteval); /* set antialiased pixel */ 13782: if ( msglevel>=99 && msgfp!=NULL ) { fprintf(msgfp, /*diagnostic output*/ 13783: "%s> irow,icol,imap=%d,%d,%d aawtval=%.4f aabyteval=%d", 13784: (isfirstaa?"aapnmlookup algorithm":"aapnm"), 13785: irow,icol,imap, aawtval,aabyteval); 13786: if ( msglevel < 100 ) fprintf(msgfp,"\n"); /* no more output */ 13787: else fprintf(msgfp,", grid#,pattern#=%d,%d\n",gridnum,patternum); 13788: isfirstaa = 0; } 13789: } /* --- end-of-if(isedge) --- */ 13790: } /* --- end-of-for(irow,icol) --- */ 13791: /* ------------------------------------------------------------------------- 13792: Back to caller with gray-scale anti-aliased bytemap 13793: -------------------------------------------------------------------------- */ 13794: /*end_of_job:*/ 13795: return ( 1 ); 13796: } /* --- end-of-function aapnmlookup() --- */ 13797: 13798: 13799: /* ========================================================================== 13800: * Function: aapatterns ( rp, irow, icol, gridnum, patternum, grayscale ) 13801: * Purpose: For patterns requireing special processing, 13802: * calculates anti-aliased value for pixel at irow,icol, 13803: * whose surrounding 3x3 pixel grid is coded by gridnum 13804: * (which must correspond to a pattern requiring special 13805: * processing). 13806: * -------------------------------------------------------------------------- 13807: * Arguments: rp (I) raster * to raster whose bitmap 13808: * is to be anti-aliased 13809: * irow (I) int containing row, 0...height-1, 13810: * of pixel to be antialiased 13811: * icol (I) int containing col, 0...width-1, 13812: * of pixel to be antialiased 13813: * gridnum (I) int containing 0...511 corresponding to 13814: * 3x3 pixel grid surrounding irow,icol 13815: * patternum (I) int containing 1...51 pattern# of 13816: * the 3x3 grid surrounding irow,icol 13817: * grayscale (I) int containing number of grayscales 13818: * to be calculated, 0...grayscale-1 13819: * (should typically be given as 256) 13820: * -------------------------------------------------------------------------- 13821: * Returns: ( int ) 0...grayscale-1 for success, 13822: * -1 = error, or no special processing required 13823: * -------------------------------------------------------------------------- 13824: * Notes: o 13825: * ======================================================================= */ 13826: /* --- entry point --- */ 13827: int aapatterns (raster *rp, int irow, int icol, 13828: int gridnum, int patternum, int grayscale) 13829: { 13830: /* ------------------------------------------------------------------------- 13831: Allocations and Declarations 13832: -------------------------------------------------------------------------- */ 13833: int aaval = (-1); /* antialiased value returned */ 13834: int iscenter = (gridnum&1); /* true if center pixel set/black */ 13835: int aapatternnum(), /* if patternum not supplied */ 13836: aapattern1124(), /* routine for patterns #11,24 */ 13837: aapattern19(), /* special routine for pattern #19 */ 13838: aapattern20(), /* special routine for pattern #20 */ 13839: aapattern39(); /* special routine for pattern #39 */ 13840: /* ------------------------------------------------------------------------- 13841: special pattern number processing 13842: -------------------------------------------------------------------------- */ 13843: if ( 1 ) { 13844: if ( patternum < 1 ) /* pattern# not supplied by caller */ 13845: patternum = aapatternnum(gridnum); /* so look it up ourselves */ 13846: switch ( patternum ) { 13847: default: break; /* no special processing */ 13848: case 11: 13849: case 24: aaval = aapattern1124(rp,irow,icol,gridnum,grayscale); break; 13850: case 19: aaval = aapattern19(rp,irow,icol,gridnum,grayscale); break; 13851: case 20: aaval = aapattern20(rp,irow,icol,gridnum,grayscale); break; 13852: case 39: aaval = aapattern39(rp,irow,icol,gridnum,grayscale); break; 13853: /* case 24: if ( (gridnum&1) == 0 ) aaval=0; break; */ 13854: case 29: aaval = (iscenter?grayscale-1:0); break; /* no antialiasing */ 13855: } /* --- end-of-switch(patternum) --- */ 13856: } /* --- end-of-if() --- */ 13857: return ( aaval ); /* return antialiased val to caller*/ 13858: } /* --- end-of-function aapatterns() --- */ 13859: 13860: 13861: /* ========================================================================== 13862: * Function: aapattern1124 ( rp, irow, icol, gridnum, grayscale ) 13863: * Purpose: calculates anti-aliased value for pixel at irow,icol, 13864: * whose surrounding 3x3 pixel grid is coded by gridnum 13865: * (which must correspond to pattern #11 or #24). 13866: * -------------------------------------------------------------------------- 13867: * Arguments: rp (I) raster * to raster whose bitmap 13868: * is to be anti-aliased 13869: * irow (I) int containing row, 0...height-1, 13870: * of pixel to be antialiased 13871: * icol (I) int containing col, 0...width-1, 13872: * of pixel to be antialiased 13873: * gridnum (I) int containing 0...511 corresponding to 13874: * 3x3 pixel grid surrounding irow,icol 13875: * grayscale (I) int containing number of grayscales 13876: * to be calculated, 0...grayscale-1 13877: * (should typically be given as 256) 13878: * -------------------------------------------------------------------------- 13879: * Returns: ( int ) 0...grayscale-1 for success, -1=any error 13880: * -------------------------------------------------------------------------- 13881: * Notes: o Handles the eight gridnum's 13882: * (gridnum/2 shown to eliminate irrelevant low-order bit) 13883: * --- --- -*- -*- 13884: * --* = 10 *-- = 18 --* = 72 *-- = 80 (pattern$11) 13885: * -*- -*- --- --- 13886: * 13887: * --- --- -** **- 13888: * --* = 11 *-- = 22 --* = 104 *-- = 208 (pattern$24) 13889: * -** **- --- --- 13890: * o For black * center pixel, using grid#10 as an example, 13891: * pixel stays --- antialiased ---* 13892: * black if -*** if part of -** 13893: * part of a -*- a diagonal -*- 13894: * corner, eg, * line, eg, * 13895: * ======================================================================= */ 13896: /* --- entry point --- */ 13897: int aapattern1124 (raster *rp, int irow, int icol, 13898: int gridnum, int grayscale) 13899: { 13900: /* ------------------------------------------------------------------------- 13901: Allocations and Declarations 13902: -------------------------------------------------------------------------- */ 13903: int aaval = (-1); /* antialiased value returned */ 13904: int iscenter = gridnum&1; /* true if pixel at irow,icol black*/ 13905: int patternum = 24; /* init for pattern#24 default */ 13906: pixbyte *bitmap = rp->pixmap; /* local rp->pixmap ptr */ 13907: int width=rp->width, height=rp->height; /* width, height of raster */ 13908: int jrow=irow, jcol=icol; /* corner or diagonal row,col */ 13909: int vertcornval=0, horzcornval=0, /* vertical, horizontal corner bits*/ 13910: topdiagval=0, botdiagval=0, /* upper,lower diagonal pixel bits */ 13911: cornval=0, diagval=0; /* vert+horzcorn, top+botdiag */ 13912: int hdirection=99, vdirection=99, /* horz,vert corner direction */ 13913: hturn=99,vturn=99, aafollowline(); /* follow corner till turns */ 13914: /* ------------------------------------------------------------------------- 13915: Check corner and diagonal pixels 13916: -------------------------------------------------------------------------- */ 13917: if ( 0 ) goto end_of_job; /* true to turn off pattern1124 */ 13918: switch ( gridnum/2 ) { /* check pattern#11,24 corner, diag*/ 13919: default: goto end_of_job; /* not a pattern#11,24 gridnum */ 13920: case 10: patternum=11; case 11: 13921: hdirection = 2; vdirection = -1; /* directions to follow corner */ 13922: if ( (jrow=irow+2) < height ) { /* vert corner below center pixel */ 13923: vertcornval = getlongbit(bitmap,(icol+jrow*width)); 13924: if ( (icol-1) >= 0 ) /* lower diag left of center */ 13925: botdiagval = getlongbit(bitmap,((icol-1)+jrow*width)); } 13926: if ( (jcol=icol+2) < width ) { /* horz corner right of center */ 13927: horzcornval = getlongbit(bitmap,(jcol+irow*width)); 13928: if ( (irow-1) >= 0 ) /* upper diag above center */ 13929: topdiagval = getlongbit(bitmap,(jcol+(irow-1)*width)); } 13930: break; 13931: case 18: patternum=11; case 22: 13932: hdirection = -2; vdirection = -1; /* directions to follow corner */ 13933: if ( (jrow=irow+2) < height ) { /* vert corner below center pixel */ 13934: vertcornval = getlongbit(bitmap,(icol+jrow*width)); 13935: if ( (icol+1) < width ) /* lower diag right of center */ 13936: botdiagval = getlongbit(bitmap,((icol+1)+jrow*width)); } 13937: if ( (jcol=icol-2) >= 0 ) { /* horz corner left of center */ 13938: horzcornval = getlongbit(bitmap,(jcol+irow*width)); 13939: if ( (irow-1) >= 0 ) /* upper diag above center */ 13940: topdiagval = getlongbit(bitmap,(jcol+(irow-1)*width)); } 13941: break; 13942: case 72: patternum=11; case 104: 13943: hdirection = 2; vdirection = 1; /* directions to follow corner */ 13944: if ( (jrow=irow-2) >= 0 ) { /* vert corner above center pixel */ 13945: vertcornval = getlongbit(bitmap,(icol+jrow*width)); 13946: if ( (icol-1) >= 0 ) /* upper diag left of center */ 13947: topdiagval = getlongbit(bitmap,((icol-1)+jrow*width)); } 13948: if ( (jcol=icol+2) < width ) { /* horz corner right of center */ 13949: horzcornval = getlongbit(bitmap,(jcol+irow*width)); 13950: if ( (irow+1) < height ) /* lower diag below center */ 13951: botdiagval = getlongbit(bitmap,(jcol+(irow+1)*width)); } 13952: break; 13953: case 80: patternum=11; case 208: 13954: hdirection = -2; vdirection = 1; /* directions to follow corner */ 13955: if ( (jrow=irow-2) >= 0 ) { /* vert corner above center pixel */ 13956: vertcornval = getlongbit(bitmap,(icol+jrow*width)); 13957: if ( (icol+1) < width ) /* upper diag right of center */ 13958: topdiagval = getlongbit(bitmap,((icol+1)+jrow*width)); } 13959: if ( (jcol=icol-2) >= 0 ) { /* horz corner left of center */ 13960: horzcornval = getlongbit(bitmap,(jcol+irow*width)); 13961: if ( (irow+1) < height ) /* lower diag below center */ 13962: botdiagval = getlongbit(bitmap,(jcol+(irow+1)*width)); } 13963: break; 13964: } /* --- end-of-switch(gridnum/2) --- */ 13965: cornval = vertcornval+horzcornval; /* 0=no corner bits, 1, 2=both */ 13966: diagval = topdiagval+botdiagval; /* 0=no diag bits, 1, 2=both */ 13967: /* ------------------------------------------------------------------------- 13968: Handle white center 13969: -------------------------------------------------------------------------- */ 13970: if ( 1 && !iscenter ) { aaval = (patternum==11?51:64); goto end_of_job; } 13971: /* ------------------------------------------------------------------------- 13972: Handle black center 13973: -------------------------------------------------------------------------- */ 13974: if ( diagval > 1 ) aaval = ( patternum==24? 255:191 ); 13975: else { 13976: hturn = aafollowline(rp,irow,icol,hdirection); 13977: vturn = aafollowline(rp,irow,icol,vdirection); 13978: if ( vturn*hdirection < 0 && hturn*vdirection < 0 ) 13979: aaval = ( patternum==24? 255:191 ); 13980: else aaval = grayscale-1; } /* actual corner */ 13981: /* ------------------------------------------------------------------------- 13982: Back to caller with grayscale antialiased value for pixel at irow,icol 13983: -------------------------------------------------------------------------- */ 13984: end_of_job: 13985: if ( aaval >= 0 ) /* have antialiasing result */ 13986: if ( msglevel>=99 && msgfp!=NULL ) fprintf(msgfp, /* diagnostic output */ 13987: "aapattern1124> irow,icol,grid#/2=%d,%d,%d, top,botdiag=%d,%d, " 13988: "vert,horzcorn=%d,%d, v,hdir=%d,%d, v,hturn=%d,%d, aaval=%d\n", 13989: irow,icol,gridnum/2, topdiagval,botdiagval, vertcornval,horzcornval, 13990: vdirection,hdirection, vturn,hturn, aaval); 13991: return ( aaval ); /* back with antialiased value */ 13992: } /* --- end-of-function aapattern1124() --- */ 13993: 13994: 13995: /* ========================================================================== 13996: * Function: aapattern19 ( rp, irow, icol, gridnum, grayscale ) 13997: * Purpose: calculates anti-aliased value for pixel at irow,icol, 13998: * whose surrounding 3x3 pixel grid is coded by gridnum 13999: * (which must correspond to pattern #19). 14000: * -------------------------------------------------------------------------- 14001: * Arguments: rp (I) raster * to raster whose bitmap 14002: * is to be anti-aliased 14003: * irow (I) int containing row, 0...height-1, 14004: * of pixel to be antialiased 14005: * icol (I) int containing col, 0...width-1, 14006: * of pixel to be antialiased 14007: * gridnum (I) int containing 0...511 corresponding to 14008: * 3x3 pixel grid surrounding irow,icol 14009: * grayscale (I) int containing number of grayscales 14010: * to be calculated, 0...grayscale-1 14011: * (should typically be given as 256) 14012: * -------------------------------------------------------------------------- 14013: * Returns: ( int ) 0...grayscale-1 for success, -1=any error 14014: * -------------------------------------------------------------------------- 14015: * Notes: o Handles the four gridnum's 14016: * (gridnum/2 shown to eliminate irrelevant low-order bit) 14017: * --- --* *-- *** 14018: * --- = 7 --* = 41 *-- = 148 --- = 224 14019: * *** --* *-- --- 14020: * ======================================================================= */ 14021: /* --- entry point --- */ 14022: int aapattern19 (raster *rp, int irow, int icol, 14023: int gridnum, int grayscale) 14024: { 14025: /* ------------------------------------------------------------------------- 14026: Allocations and Declarations 14027: -------------------------------------------------------------------------- */ 14028: int aaval = (-1); /* antialiased value returned */ 14029: int iscenter = gridnum&1; /* true if pixel at irow,icol black*/ 14030: int orientation = 1, /* 1=vertical, 2=horizontal */ 14031: jrow=irow, jcol=icol; /* middle pixel of *** line */ 14032: int turn1=0,turn2=0, aafollowline(); /* follow *** line till it turns */ 14033: /* ------------------------------------------------------------------------- 14034: Initialization and calculation of antialiased value 14035: -------------------------------------------------------------------------- */ 14036: /* --- check input -- */ 14037: if ( iscenter ) goto end_of_job; /* we only antialias white pixels */ 14038: /* --- set params --- */ 14039: switch ( gridnum/2 ) { /* check pattern#19 orientation */ 14040: default: goto end_of_job; /* not a pattern#19 gridnum */ 14041: case 7: orientation=2; jrow++; break; 14042: case 41: orientation=1; jcol++; break; 14043: case 148: orientation=1; jcol--; break; 14044: case 224: orientation=2; jrow--; break; 14045: } /* --- end-of-switch(gridnum/2) --- */ 14046: /* --- get turns in both directions --- */ 14047: if ( (turn1 = aafollowline(rp,jrow,jcol,orientation)) == 0 ) goto end_of_job; 14048: if ( (turn2 = aafollowline(rp,jrow,jcol,-orientation)) == 0) goto end_of_job; 14049: if ( turn1*turn2 >= 0 ) goto end_of_job; /* both turns in same direction */ 14050: /* --- weight pixel --- */ 14051: aaval = grayscale / ( 3 + min2(abs(turn1),abs(turn2)) ); 14052: /* ------------------------------------------------------------------------- 14053: Back to caller with grayscale antialiased value for pixel at irow,icol 14054: -------------------------------------------------------------------------- */ 14055: end_of_job: 14056: if ( aaval >= 0 ) /* have antialiasing result */ 14057: if ( msglevel>=99 && msgfp!=NULL ) fprintf(msgfp, /* diagnostic output */ 14058: "aapattern19> irow,icol,grid#/2=%d,%d,%d, turn+%d,%d=%d,%d, aaval=%d\n", 14059: irow,icol,gridnum/2, orientation,-orientation,turn1,turn2, aaval); 14060: return ( aaval ); /* back with antialiased value */ 14061: } /* --- end-of-function aapattern19() --- */ 14062: 14063: 14064: /* ========================================================================== 14065: * Function: aapattern20 ( rp, irow, icol, gridnum, grayscale ) 14066: * Purpose: calculates anti-aliased value for pixel at irow,icol, 14067: * whose surrounding 3x3 pixel grid is coded by gridnum 14068: * (which must correspond to pattern #20). 14069: * -------------------------------------------------------------------------- 14070: * Arguments: rp (I) raster * to raster whose bitmap 14071: * is to be anti-aliased 14072: * irow (I) int containing row, 0...height-1, 14073: * of pixel to be antialiased 14074: * icol (I) int containing col, 0...width-1, 14075: * of pixel to be antialiased 14076: * gridnum (I) int containing 0...511 corresponding to 14077: * 3x3 pixel grid surrounding irow,icol 14078: * grayscale (I) int containing number of grayscales 14079: * to be calculated, 0...grayscale-1 14080: * (should typically be given as 256) 14081: * -------------------------------------------------------------------------- 14082: * Returns: ( int ) 0...grayscale-1 for success, -1=any error 14083: * -------------------------------------------------------------------------- 14084: * Notes: o Handles the eight gridnum's 14085: * (gridnum/2 shown to eliminate irrelevant low-order bit) 14086: * --- --- --* -*- 14087: * --* = 14 *-- = 19 --* = 42 --* = 73 14088: * **- -** -*- --* 14089: * 14090: * -*- -** *-- **- 14091: * *-- = 84 *-- = 112 *-- = 146 --* = 200 14092: * *-- --- -*- --- 14093: * ======================================================================= */ 14094: /* --- entry point --- */ 14095: int aapattern20 (raster *rp, int irow, int icol, 14096: int gridnum, int grayscale) 14097: { 14098: /* ------------------------------------------------------------------------- 14099: Allocations and Declarations 14100: -------------------------------------------------------------------------- */ 14101: int aaval = (-1); /* antialiased value returned */ 14102: int iscenter = gridnum&1; /* true if pixel at irow,icol black*/ 14103: int direction = 1, /* direction to follow ** line */ 14104: jrow1=irow, jcol1=icol, /* coords of * */ 14105: jrow2=irow, jcol2=icol; /* coords of adjacent ** pixel */ 14106: int turn1=0,turn2=0, aafollowline(); /* follow *,** lines till turns */ 14107: /* ------------------------------------------------------------------------- 14108: Initialization and calculation of antialiased value 14109: -------------------------------------------------------------------------- */ 14110: /* --- check input -- */ 14111: if ( 1 ) goto end_of_job; /* don't want this one */ 14112: if ( iscenter ) goto end_of_job; /* we only antialias white pixels */ 14113: /* --- set params --- */ 14114: switch ( gridnum/2 ) { /* check pattern#20 orientation */ 14115: default: goto end_of_job; /* not a pattern#20 gridnum */ 14116: case 14: direction=-2; jcol1++; jrow2++; break; 14117: case 19: direction=2; jcol1--; jrow2++; break; 14118: case 42: direction=1; jrow1++; jcol2++; break; 14119: case 73: direction=-1; jrow1--; jcol2++; break; 14120: case 84: direction=-1; jrow1--; jcol2--; break; 14121: case 112: direction=2; jcol1--; jrow2--; break; 14122: case 146: direction=1; jrow1++; jcol2--; break; 14123: case 200: direction=-2; jcol1++; jrow2--; break; 14124: } /* --- end-of-switch(gridnum/2) --- */ 14125: /* --- get turns in both directions --- */ 14126: if ( (turn1=aafollowline(rp,jrow1,jcol1,-direction)) == 0 ) goto end_of_job; 14127: if ( (turn2=aafollowline(rp,jrow2,jcol2,direction)) == 0 ) goto end_of_job; 14128: if ( turn1*turn2 >= 0 ) goto end_of_job; /* both turns in same direction */ 14129: /* --- weight pixel --- */ 14130: aaval = grayscale / ( 3 + min2(abs(turn1),abs(turn2)) ); 14131: /* ------------------------------------------------------------------------- 14132: Back to caller with grayscale antialiased value for pixel at irow,icol 14133: -------------------------------------------------------------------------- */ 14134: end_of_job: 14135: if ( aaval >= 0 ) /* have antialiasing result */ 14136: if ( msglevel>=99 && msgfp!=NULL ) fprintf(msgfp, /* diagnostic output */ 14137: "aapattern20> irow,icol,grid#/2=%d,%d,%d, turn%d,%d=%d,%d, aaval=%d\n", 14138: irow,icol,gridnum/2, -direction,direction,turn1,turn2, aaval); 14139: return ( aaval ); /* back with antialiased value */ 14140: } /* --- end-of-function aapattern20() --- */ 14141: 14142: 14143: /* ========================================================================== 14144: * Function: aapattern39 ( rp, irow, icol, gridnum, grayscale ) 14145: * Purpose: calculates anti-aliased value for pixel at irow,icol, 14146: * whose surrounding 3x3 pixel grid is coded by gridnum 14147: * (which must correspond to pattern #39). 14148: * -------------------------------------------------------------------------- 14149: * Arguments: rp (I) raster * to raster whose bitmap 14150: * is to be anti-aliased 14151: * irow (I) int containing row, 0...height-1, 14152: * of pixel to be antialiased 14153: * icol (I) int containing col, 0...width-1, 14154: * of pixel to be antialiased 14155: * gridnum (I) int containing 0...511 corresponding to 14156: * 3x3 pixel grid surrounding irow,icol 14157: * grayscale (I) int containing number of grayscales 14158: * to be calculated, 0...grayscale-1 14159: * (should typically be given as 256) 14160: * -------------------------------------------------------------------------- 14161: * Returns: ( int ) 0...grayscale-1 for success, -1=any error 14162: * -------------------------------------------------------------------------- 14163: * Notes: o Handles the eight gridnum's 14164: * (gridnum/2 shown to eliminate irrelevant low-order bit) 14165: * --- --- --* -** 14166: * --* = 15 *-- = 23 --* = 43 --* = 105 14167: * *** *** -** --* 14168: * 14169: * **- *** *-- *** 14170: * *-- = 212 *-- = 240 *-- = 150 --* = 232 14171: * *-- --- **- --- 14172: * ======================================================================= */ 14173: /* --- entry point --- */ 14174: int aapattern39 (raster *rp, int irow, int icol, 14175: int gridnum, int grayscale) 14176: { 14177: /* ------------------------------------------------------------------------- 14178: Allocations and Declarations 14179: -------------------------------------------------------------------------- */ 14180: int aaval = (-1); /* antialiased value returned */ 14181: int iscenter = gridnum&1; /* true if pixel at irow,icol black*/ 14182: int direction = 1, /* direction to follow ** line */ 14183: jrow1=irow, jcol1=icol, /* coords of * */ 14184: jrow2=irow, jcol2=icol; /* coords of adjacent ** pixel */ 14185: int turn1=0,turn2=0, aafollowline(); /* follow *,** lines till turns */ 14186: /* ------------------------------------------------------------------------- 14187: Initialization and calculation of antialiased value 14188: -------------------------------------------------------------------------- */ 14189: /* --- check input -- */ 14190: if ( iscenter ) goto end_of_job; /* we only antialias white pixels */ 14191: /* --- set params --- */ 14192: switch ( gridnum/2 ) { /* check pattern#39 orientation */ 14193: default: goto end_of_job; /* not a pattern#39 gridnum */ 14194: case 15: direction=-2; jcol1++; jrow2++; break; 14195: case 23: direction=2; jcol1--; jrow2++; break; 14196: case 43: direction=1; jrow1++; jcol2++; break; 14197: case 105: direction=-1; jrow1--; jcol2++; break; 14198: case 212: direction=-1; jrow1--; jcol2--; break; 14199: case 240: direction=2; jcol1--; jrow2--; break; 14200: case 150: direction=1; jrow1++; jcol2--; break; 14201: case 232: direction=-2; jcol1++; jrow2--; break; 14202: } /* --- end-of-switch(gridnum/2) --- */ 14203: /* --- get turns directions (tunr1==1 signals inside corner) --- */ 14204: if ( (turn1=aafollowline(rp,jrow1,jcol1,-direction)) == 1 ) 14205: { aaval=0; goto end_of_job; } 14206: if ( 1 ) goto end_of_job; /* stop here for now */ 14207: if ( (turn2=aafollowline(rp,jrow2,jcol2,direction)) == 0 ) goto end_of_job; 14208: if ( turn1*turn2 >= 0 ) goto end_of_job; /* both turns in same direction */ 14209: /* --- weight pixel --- */ 14210: aaval = grayscale / ( 3 + min2(abs(turn1),abs(turn2)) ); 14211: /* ------------------------------------------------------------------------- 14212: Back to caller with grayscale antialiased value for pixel at irow,icol 14213: -------------------------------------------------------------------------- */ 14214: end_of_job: 14215: if ( aaval >= 0 ) /* have antialiasing result */ 14216: if ( msglevel>=99 && msgfp!=NULL ) fprintf(msgfp, /* diagnostic output */ 14217: "aapattern39> irow,icol,grid#/2=%d,%d,%d, turn%d,%d=%d,%d, aaval=%d\n", 14218: irow,icol,gridnum/2, -direction,direction,turn1,turn2, aaval); 14219: return ( aaval ); /* back with antialiased value */ 14220: } /* --- end-of-function aapattern39() --- */ 14221: 14222: 14223: /* ========================================================================== 14224: * Function: aafollowline ( rp, irow, icol, direction ) 14225: * Purpose: starting with pixel at irow,icol, moves in 14226: * specified direction looking for a "turn" 14227: * -------------------------------------------------------------------------- 14228: * Arguments: rp (I) raster * to raster containing pixel image 14229: * irow (I) int containing row, 0...height-1, 14230: * of first pixel 14231: * icol (I) int containing col, 0...width-1, 14232: * of first pixel 14233: * direction (I) int containing +1 to follow line up/north 14234: * (decreasing irow), -1 to follow line 14235: * down/south (increasing irow), +2 to follow 14236: * line right/east (increasing icol), 14237: * -2 to follow line left/west (decreasing icol) 14238: * -------------------------------------------------------------------------- 14239: * Returns: ( int ) #rows or #cols traversed prior to turn, 14240: * or 0 if no turn detected (or for any error). 14241: * Sign is + if turn direction is right/east or 14242: * up/north, or is - if left/west or down/south. 14243: * -------------------------------------------------------------------------- 14244: * Notes: o Here are some examples illustrating turn detection in 14245: * +2 (right/east) direction. Turns in other directions 14246: * are detected similarly/symmetrically. * denotes black 14247: * bits (usually fg), - denotes white bits (usually bg), 14248: * and ? denotes "don't care" bit (won't affect outcome). 14249: * Arrow --> points to start pixel denoted by irow,icol. 14250: * 14251: * *??? -??? turn=0 (no turn) is returned 14252: * -->*??? or -->-??? because the start pixel isn't 14253: * *??? -??? on an edge to begin with 14254: * 14255: * ---- **-- turn=0 returned because the 14256: * -->***- or -->***- line ends abruptly without 14257: * ---- ---- turning (even the second case) 14258: * 14259: * ---* ---* turn=0 returned because the 14260: * -->***- or -->**** line forms a Y or T rather 14261: * ---* ---* than turning 14262: * 14263: * ***- **** turn=+3 returned 14264: * -->***- or -->***- (outside corner) 14265: * ---- ---- 14266: * 14267: * ***** ****- turn=-4 returned 14268: * -->***** or -->****- (inside corner) 14269: * ----* ----* 14270: * 14271: * ----* ----* turn=+4 returned 14272: * -->****- or -->***** (outside or inside corner) 14273: * ----- ----- 14274: * ======================================================================= */ 14275: /* --- entry point --- */ 14276: int aafollowline (raster *rp, int irow, int icol, int direction) 14277: { 14278: /* ------------------------------------------------------------------------- 14279: Allocations and Declarations 14280: -------------------------------------------------------------------------- */ 14281: pixbyte *bitmap = rp->pixmap; /* local rp->pixmap ptr */ 14282: int width=rp->width, height=rp->height; /* width, height of raster */ 14283: int drow=0, dcol=0, /* delta row,col to follow line */ 14284: jrow=irow, jcol=icol; /* current row,col following line */ 14285: int bitval=1, /* value of rp bit at irow,icol */ 14286: fgval=1, bgval=0, /* "fg" is whatever bitval is */ 14287: bitminus=0, bitplus=0; /* value of left/down, right/up bit*/ 14288: int isline=1, isedge=0; /*isline signals one-pixel wide line*/ 14289: int turn = 0, /* detected turn back to caller */ 14290: maxturn = maxfollow; /* don't follow more than max pixels*/ 14291: /* ------------------------------------------------------------------------- 14292: Initialization 14293: -------------------------------------------------------------------------- */ 14294: /* --- check input --- */ 14295: if ( irow<0 || irow>=height /* irow out-of-bounds */ 14296: || icol<0 || icol>=width ) goto end_of_job; /* icol out-of-bounds */ 14297: /* --- adjust maxturn for magstep --- */ 14298: if ( 1 ) /* guard */ 14299: if ( magstep > 1 && magstep <= 10 ) /* sanity check */ 14300: maxturn *= magstep; /* factor in magnification */ 14301: /* --- starting bit -- see if we're following a fg (usual), or bg line --- */ 14302: bitval = getlongbit(bitmap,(icol+irow*width)); /* starting pixel (bg or fg)*/ 14303: fgval = bitval; bgval = (1-bitval); /* define "fg" as whatever bitval is*/ 14304: /* --- set drow,dcol corresponding to desired direction --- */ 14305: switch ( direction ) { /* determine drow,dcol for direction*/ 14306: default: goto end_of_job; /* unrecognized direction arg */ 14307: case 1: drow = (-1); break; /* follow line up/north */ 14308: case -1: drow = 1; break; /* down/south */ 14309: case 2: dcol = 1; break; /* right/east */ 14310: case -2: dcol = (-1); break; } /* left/west */ 14311: /* --- set bitminus and bitplus --- */ 14312: if ( drow == 0 ) { /* we're following line right/left */ 14313: if ( irow < height ) /* there's a pixel below current */ 14314: bitminus = getlongbit(bitmap,(icol+(irow+1)*width)); /* get it */ 14315: if ( irow > 0 ) /* there's a pixel above current */ 14316: bitplus = getlongbit(bitmap,(icol+(irow-1)*width)); } /* get it */ 14317: if ( dcol == 0 ) { /* we're following line up/down */ 14318: if ( icol < width ) /* there's a pixel to the right */ 14319: bitplus = getlongbit(bitmap,(icol+1+irow*width)); /* get it */ 14320: if ( icol > 0 ) /* there's a pixel to the left */ 14321: bitminus = getlongbit(bitmap,(icol-1+irow*width)); } /* get it */ 14322: /* --- check for lack of line to follow --- */ 14323: if ( bitval == bitplus /* starting pixel same as above */ 14324: && bitval == bitminus ) /* and below (or right and left) */ 14325: goto end_of_job; /* so there's no line to follow */ 14326: /* --- set isline and isedge (already initted for isline) --- */ 14327: if ( bitval == bitplus ) /* starting pixel same as above */ 14328: { isedge = (-1); isline = 0; } /* so we're at an edge below */ 14329: if ( bitval == bitminus ) /* starting pixel same as below */ 14330: { isedge = 1; isline = 0; } /* so we're at an edge above */ 14331: /* ------------------------------------------------------------------------- 14332: follow line 14333: -------------------------------------------------------------------------- */ 14334: while ( 1 ) { /* until turn found (or max) */ 14335: /* --- local allocations and declarations --- */ 14336: int dbitval=0, /* value of bit at jrow,jcol */ 14337: dbitminus=0, dbitplus=0; /* value of left/down, right/up bit*/ 14338: /* --- bump pixel count and indexes; check for max or end-of-raster --- */ 14339: turn++; /* bump #pixels followed */ 14340: jrow += drow; jcol += dcol; /* indexes of next pixel to check */ 14341: if ( turn > maxturn /* already followed max #pixels */ 14342: || jrow<0 || jrow>=height /* or jrow past end-of-raster */ 14343: || jcol<0 || jcol>=width ) /* or jcol past end-of-raster */ 14344: { turn = 0; goto end_of_job; } /* so quit without finding a turn */ 14345: /* --- set current bit (dbitval) --- */ 14346: dbitval = getlongbit(bitmap,(jcol+jrow*width)); /*value of jrow,jcol bit*/ 14347: /* --- set dbitminus and dbitplus --- */ 14348: if ( drow == 0 ) { /* we're following line right/left */ 14349: if ( irow < height ) /* there's a pixel below current */ 14350: dbitminus = getlongbit(bitmap,(jcol+(irow+1)*width)); /* get it */ 14351: if ( irow > 0 ) /* there's a pixel above current */ 14352: dbitplus = getlongbit(bitmap,(jcol+(irow-1)*width)); } /* get it */ 14353: if ( dcol == 0 ) { /* we're following line up/down */ 14354: if ( icol < width ) /* there's a pixel to the right */ 14355: dbitplus = getlongbit(bitmap,(icol+1+jrow*width)); /* get it */ 14356: if ( icol > 0 ) /* there's a pixel to the left */ 14357: dbitminus = getlongbit(bitmap,(icol-1+jrow*width)); } /* get it */ 14358: /* --- first check for abrupt end-of-line, or for T or Y --- */ 14359: if ( isline != 0 ) /* abrupt end or T,Y must be a line*/ 14360: if ( ( bgval == dbitval /* end-of-line if pixel flips to bg*/ 14361: && bgval == dbitplus /* and bg same as above pixel */ 14362: && bgval == dbitminus ) /* and below (or right and left) */ 14363: || ( fgval == dbitplus /* T or Y if fg same as above pixel*/ 14364: && fgval == dbitminus ) ) /* and below (or right and left) */ 14365: { turn = 0; goto end_of_job; } /* so we're at a T or Y */ 14366: /* --- check for turning line --- */ 14367: if ( isline != 0 ) { /* turning line must be a line */ 14368: if ( fgval == dbitminus ) /* turning down */ 14369: { turn = -turn; goto end_of_job; } /* so return negative turn */ 14370: else if ( fgval == dbitplus ) /* turning up */ 14371: goto end_of_job; } /* so return positive turn */ 14372: /* --- check for inside corner at edge --- */ 14373: if ( isedge != 0 ) { /* inside corner must be a edge */ 14374: if ( isedge < 0 && fgval == bitminus ) /* corner below */ 14375: { turn = -turn; goto end_of_job; } /* so return negative turn */ 14376: if ( isedge > 0 && fgval == bitplus ) /* corner above */ 14377: goto end_of_job; } /* so return positive turn */ 14378: /* --- check for abrupt end at edge --- */ 14379: if ( isedge != 0 /* abrupt edge end must be an edge */ 14380: && fgval == dbitval ) /* and line must not end */ 14381: if ( (isedge < 0 && bgval == bitplus) /* abrupt end above */ 14382: || (isedge > 0 && bgval == bitminus) ) /* or abrupt end below */ 14383: { turn = 0; goto end_of_job; } /* so edge ended abruptly */ 14384: /* --- check for outside corner at edge --- */ 14385: if ( isedge != 0 /* outside corner must be a edge */ 14386: && bgval == dbitval ) { /* and line must end */ 14387: if ( isedge > 0 ) turn = -turn; /* outside turn down from edge above*/ 14388: goto end_of_job; } 14389: } /* --- end-of-while(1) --- */ 14390: /* ------------------------------------------------------------------------- 14391: Back to caller with #rows or #cols traversed, and direction of detected turn 14392: -------------------------------------------------------------------------- */ 14393: end_of_job: 14394: if ( msglevel>=99 && msgfp!=NULL ) /* debugging/diagnostic output */ 14395: fprintf(msgfp,"aafollowline> irow,icol,direction=%d,%d,%d, turn=%d\n", 14396: irow,icol,direction,turn); 14397: return ( turn ); 14398: } /* --- end-of-function aafollowline() --- */ 14399: 14400: 14401: /* ========================================================================== 14402: * Function: aagridnum ( rp, irow, icol ) 14403: * Purpose: calculates gridnum, 0-511 (see Notes below), 14404: * for 3x3 grid centered at irow,icol 14405: * -------------------------------------------------------------------------- 14406: * Arguments: rp (I) raster * to raster containing 14407: * bitmap image (to be anti-aliased) 14408: * irow (I) int containing row, 0...height-1, 14409: * at center of 3x3 grid 14410: * icol (I) int containing col, 0...width-1, 14411: * at center of 3x3 grid 14412: * -------------------------------------------------------------------------- 14413: * Returns: ( int ) 0-511 grid number, or -1=any error 14414: * -------------------------------------------------------------------------- 14415: * Notes: o Input gridnum is a 9-bit int, 0-511, coding a 3x3 pixel grid 14416: * whose bit positions (and corresponding values) in gridnum are 14417: * 876 256 128 64 14418: * 504 = 32 1 16 14419: * 321 8 4 2 14420: * Thus, for example (*=pixel set/black, -=pixel not set/white), 14421: * *-- *-- -** (note that 209 is the 14422: * -*- = 259 *-- = 302 -** = 209 inverse, set<-->unset, 14423: * --* *** --- of 302) 14424: * o A set pixel is considered black, an unset pixel considered 14425: * white. 14426: * ======================================================================= */ 14427: /* --- entry point --- */ 14428: int aagridnum (raster *rp, int irow, int icol) 14429: { 14430: /* ------------------------------------------------------------------------- 14431: Allocations and Declarations 14432: -------------------------------------------------------------------------- */ 14433: pixbyte *bitmap = rp->pixmap; /* local rp->pixmap ptr */ 14434: int width=rp->width, height=rp->height, /* width, height of raster */ 14435: imap = icol + irow*width; /* pixel index = icol + irow*width */ 14436: int bitval=0, /* value of rp bit at irow,icol */ 14437: nnbitval=0, nebitval=0, eebitval=0, sebitval=0, /*adjacent vals*/ 14438: ssbitval=0, swbitval=0, wwbitval=0, nwbitval=0, /*compass pt names*/ 14439: gridnum = (-1); /* grid# 0-511 for above 9 bits */ 14440: /* ------------------------------------------------------------------------- 14441: check input 14442: -------------------------------------------------------------------------- */ 14443: if ( irow<0 || irow>=height /* irow out-of-bounds */ 14444: || icol<0 || icol>=width ) goto end_of_job; /* icol out-of-bounds */ 14445: /* ------------------------------------------------------------------------- 14446: get the 9 bits comprising the 3x3 grid centered at irow,icol 14447: -------------------------------------------------------------------------- */ 14448: /* --- get center bit --- */ 14449: bitval = getlongbit(bitmap,imap); /* value of rp input bit at imap */ 14450: /* --- get 8 surrounding bits --- */ 14451: if ( irow > 0 ) /* nn (north) bit available */ 14452: nnbitval = getlongbit(bitmap,imap-width); /* nn bit value */ 14453: if ( irow < height-1 ) /* ss (south) bit available */ 14454: ssbitval = getlongbit(bitmap,imap+width); /* ss bit value */ 14455: if ( icol > 0 ) /* ww (west) bit available */ 14456: { wwbitval = getlongbit(bitmap,imap-1); /* ww bit value */ 14457: if ( irow > 0 ) /* nw bit available */ 14458: nwbitval = getlongbit(bitmap,imap-width-1); /* nw bit value */ 14459: if ( irow < height-1 ) /* sw bit available */ 14460: swbitval = getlongbit(bitmap,imap+width-1); } /* sw bit value */ 14461: if ( icol < width-1 ) /* ee (east) bit available */ 14462: { eebitval = getlongbit(bitmap,imap+1); /* ee bit value */ 14463: if ( irow > 0 ) /* ne bit available */ 14464: nebitval = getlongbit(bitmap,imap-width+1); /* ne bit value */ 14465: if ( irow < height-1 ) /* se bit available */ 14466: sebitval = getlongbit(bitmap,imap+width+1); } /* se bit value */ 14467: /* --- set gridnum --- */ 14468: gridnum = 0; /* clear all bits */ 14469: if ( bitval ) gridnum = 1; /* set1bit(gridnum,0); */ 14470: if ( nwbitval ) gridnum += 256; /* set1bit(gridnum,8); */ 14471: if ( nnbitval ) gridnum += 128; /* set1bit(gridnum,7); */ 14472: if ( nebitval ) gridnum += 64; /* set1bit(gridnum,6); */ 14473: if ( wwbitval ) gridnum += 32; /* set1bit(gridnum,5); */ 14474: if ( eebitval ) gridnum += 16; /* set1bit(gridnum,4); */ 14475: if ( swbitval ) gridnum += 8; /* set1bit(gridnum,3); */ 14476: if ( ssbitval ) gridnum += 4; /* set1bit(gridnum,2); */ 14477: if ( sebitval ) gridnum += 2; /* set1bit(gridnum,1); */ 14478: /* ------------------------------------------------------------------------- 14479: Back to caller with gridnum coding 3x3 grid centered at irow,icol 14480: -------------------------------------------------------------------------- */ 14481: end_of_job: 14482: return ( gridnum ); 14483: } /* --- end-of-function aagridnum() --- */ 14484: 14485: 14486: /* ========================================================================== 14487: * Function: aapatternnum ( gridnum ) 14488: * Purpose: Looks up the pattern number 1...51 14489: * corresponding to the 3x3 pixel grid coded by gridnum 0=no 14490: * pixels set (white) to 511=all pixels set (black). 14491: * -------------------------------------------------------------------------- 14492: * Arguments: gridnum (I) int containing 0-511 coding a 3x3 pixel grid 14493: * (see Notes below) 14494: * -------------------------------------------------------------------------- 14495: * Returns: ( int ) 1 to 51, or -1=error 14496: * -------------------------------------------------------------------------- 14497: * Notes: o Input gridnum is a 9-bit int, 0-511, coding a 3x3 pixel grid 14498: * whose bit positions (and corresponding values) in gridnum are 14499: * 876 256 128 64 14500: * 504 = 32 1 16 14501: * 321 8 4 2 14502: * Thus, for example (*=pixel set/black, -=pixel not set/white), 14503: * *-- *-- -** (note that 209 is the 14504: * -*- = 259 *-- = 302 -** = 209 inverse, set<-->unset, 14505: * --* *** --- of 302) 14506: * o A set pixel is considered black, an unset pixel considered 14507: * white. 14508: * o Ignoring whether the center pixel is set or unset, and 14509: * taking rotation, reflection and inversion (set<-->unset) 14510: * symmetries into account, there are 32 unique pixel patterns. 14511: * If inversions are listed separately, there are 51 patterns. 14512: * o Here are the 51 unique patterns, with ? always denoting the 14513: * undetermined center pixel. At the upper-left corner of each 14514: * pattern is the "pattern index number" assigned to it in this 14515: * function. At the upper-right is the pattern's multiplicity, 14516: * i.e., the number of different patterns obtained by rotations 14517: * and reflection of the illustrated one. Inverse patters are 14518: * illustrated immediately beneath the original (the first three 14519: * four-pixel patterns have identical inverses). 14520: * ------------------------------------------------------------- 14521: * No pixels set: 14522: * #1 1 (in this case, 1 signifies that rotation 14523: * --- and reflection give no different grids) 14524: * -?- 14525: * --- 14526: * Inverse, all eight pixels set 14527: * #2 1 (the inverse multiplicity is always the same) 14528: * *** 14529: * *?* 14530: * *** 14531: * ------------------------------------------------------------- 14532: * One pixel set: 14533: * #3 4 #4 4 14534: * *-- -*- 14535: * -?- -?- 14536: * --- --- 14537: * Inverse, seven pixels set: 14538: * #5 4 #6 4 14539: * -** *-* 14540: * *?* *?* 14541: * *** *** 14542: * ------------------------------------------------------------- 14543: * Two pixels set: 14544: * #7 8 #8 4 #9 8 10 2 11 4 12 2 14545: * **- *-* *-- *-- -*- -*- 14546: * -?- -?- -?* -?- -?* -?- 14547: * --- --- --- --* --- -*- 14548: * Inverse, six pixels set: 14549: * #13 8 14 4 15 8 16 2 17 4 18 2 14550: * --* -*- -** -** *-* *-* 14551: * *?* *?* *?- *?* *?- *?* 14552: * *** *** *** **- *** *-* 14553: * ------------------------------------------------------------- 14554: * Three pixels set: 14555: * #19 4 20 8 21 8 22 8 23 8 24 4 25 4 26 4 27 4 28 4 14556: * *** **- **- **- **- **- *-* *-* -*- -*- 14557: * -?- -?* -?- -?- -?- *?- -?- -?- -?* -?* 14558: * --- --- --* -*- *-- --- --* -*- -*- *-- 14559: * Inverse, five pixels set: 14560: * #29 4 30 8 31 8 32 8 33 8 34 4 35 4 36 4 37 4 38 4 14561: * --- --* --* --* --* --* -*- -*- *-* *-* 14562: * *?* *?- *?* *?* *?* -?* *?* *?* *?- *?- 14563: * *** *** **- *-* -** *** **- *-* *-* -** 14564: * ------------------------------------------------------------- 14565: * Four pixels set (including inverses): 14566: * #39 8 40 4 41 8 42 8 43 4 44 4 45 8 46 1 14567: * *** **- **- *** *** **- **- *-* 14568: * -?* -?- -?* -?- -?- -?* -?* -?- 14569: * --- -** *-- --* -*- --* -*- *-* 14570: * 14571: * #47 8 48 4 49 4 50 8 51 1 14572: * --- --- --* --* -*- 14573: * *?* *?* *?- *?- *?* 14574: * **- *-* **- *-* -*- 14575: * ======================================================================= */ 14576: /* --- entry point --- */ 14577: int aapatternnum ( int gridnum ) 14578: { 14579: /* ------------------------------------------------------------------------- 14580: Allocations and Declarations 14581: -------------------------------------------------------------------------- */ 14582: int pattern = (-1); /*pattern#, 1-51, for input gridnum*/ 14583: /* --- 14584: * pattern number corresponding to input gridnum/2 code 14585: * ( gridnum/2 strips off gridnum's low bit because it's 14586: * the same pattern whether or not center pixel is set ) 14587: * --- */ 14588: static int patternnum[] = { 14589: 1, 3, 4, 7, 3, 8, 7,19, 4, 7,11,24, 9,23,20,39, /* 0- 15 */ 14590: 4, 9,11,20, 7,23,24,39,12,22,27,47,22,48,47,29, /* 16- 31 */ 14591: 3, 8, 9,23,10,25,21,42, 7,19,20,39,21,42,44,34, /* 32- 47 */ 14592: 9,26,28,41,21,50,49,30,22,43,45,33,40,32,31,13, /* 48- 63 */ 14593: 4, 9,12,22, 9,26,22,43,11,20,27,47,28,41,45,33, /* 64- 79 */ 14594: 11,28,27,45,20,41,47,33,27,45,51,35,45,36,35,14, /* 80- 95 */ 14595: 7,23,22,48,21,50,40,32,24,39,47,29,49,30,31,13, /* 96-111 */ 14596: 20,41,45,36,44,38,31,15,47,33,35,14,31,15,16, 5, /* 112-127 */ 14597: 3,10, 9,21, 8,25,23,42, 9,21,28,49,26,50,41,30, /* 128-143 */ 14598: 7,21,20,44,19,42,39,34,22,40,45,31,43,32,33,13, /* 144-159 */ 14599: 8,25,26,50,25,46,50,37,23,42,41,30,50,37,38,17, /* 160-175 */ 14600: 23,50,41,38,42,37,30,17,48,32,36,15,32,18,15, 6, /* 176-191 */ 14601: 7,21,22,40,23,50,48,32,20,44,45,31,41,38,36,15, /* 192-207 */ 14602: 24,49,47,31,39,30,29,13,47,31,35,16,33,15,14, 5, /* 208-223 */ 14603: 19,42,43,32,42,37,32,18,39,34,33,13,30,17,15, 6, /* 224-239 */ 14604: 39,30,33,15,34,17,13, 6,29,13,14, 5,13, 6, 5, 2, /* 240-255 */ 14605: -1 } ; /* --- end-of-patternnum[] --- */ 14606: /* ------------------------------------------------------------------------- 14607: look up pattern number for gridnum 14608: -------------------------------------------------------------------------- */ 14609: /* --- first check input --- */ 14610: if ( gridnum<0 || gridnum>511 ) goto end_of_job; /* gridnum out of bounds */ 14611: /* --- look up pattern number, 1-51, corresponding to input gridnum --- */ 14612: pattern = patternnum[gridnum/2]; /* /2 strips off gridnum's low bit */ 14613: if ( pattern<1 || pattern>51 ) pattern = (-1); /* some internal error */ 14614: end_of_job: 14615: return ( pattern ); /* back to caller with pattern# */ 14616: } /* --- end-of-function aapatternnum() --- */ 14617: 14618: 14619: /* ========================================================================== 14620: * Function: aalookup ( gridnum ) 14621: * Purpose: Looks up the grayscale value 0=white to 255=black 14622: * corresponding to the 3x3 pixel grid coded by gridnum 0=no 14623: * pixels set (white) to 511=all pixels set (black). 14624: * -------------------------------------------------------------------------- 14625: * Arguments: gridnum (I) int containing 0-511 coding a 3x3 pixel grid 14626: * -------------------------------------------------------------------------- 14627: * Returns: ( int ) 0=white to 255=black, or -1=error 14628: * -------------------------------------------------------------------------- 14629: * Notes: o Input gridnum is a 9-bit int, 0-511, coding a 3x3 pixel grid 14630: * o A set pixel is considered black, an unset pixel considered 14631: * white. Likewise, the returned grayscale is 255 for black, 14632: * 0 for white. You'd more typically want to use 255-grayscale 14633: * so that 255 is white and 0 is black. 14634: * o The returned number is the (lowpass) antialiased grayscale 14635: * for the center pixel (gridnum bit 0) of the grid. 14636: * ======================================================================= */ 14637: /* --- entry point --- */ 14638: int aalookup ( int gridnum ) 14639: { 14640: /* ------------------------------------------------------------------------- 14641: Allocations and Declarations 14642: -------------------------------------------------------------------------- */ 14643: int grayscale = (-1); /*returned grayscale, init for error*/ 14644: int pattern = (-1), aapatternnum(); /*pattern#, 1-51, for input gridnum*/ 14645: int iscenter = gridnum&1; /*low-order bit set for center pixel*/ 14646: /* --- gray scales --- */ 14647: #define WHT 0 14648: #define LGT 64 14649: #define GRY 128 14650: #define DRK 192 14651: #define BLK 255 14652: #if 1 14653: /* --- 14654: * modified aapnm() grayscales (second try) 14655: * --- */ 14656: /* --- grayscale for each pattern when center pixel set/black --- */ 14657: static int grayscale1[] = { -1, /* [0] index not used */ 14658: BLK,BLK,BLK,BLK,242,230,BLK,BLK,BLK,160, /* 1-10 */ 14659: /* BLK,BLK,BLK,BLK,242,230,BLK,BLK,BLK,BLK, */ /* 1-10 */ 14660: BLK,BLK,217,230,217,230,204,BLK,BLK,166, /* 11-20 */ 14661: BLK,BLK,BLK,BLK,BLK,BLK,178,166,204,191, /* 21-30 */ 14662: 204,BLK,204,191,217,204,BLK,191,178,BLK, /* 31-40 */ 14663: 178,BLK,BLK,178,191,BLK,191,BLK,178,BLK,204, /* 41-51 */ 14664: -1 } ; /* --- end-of-grayscale1[] --- */ 14665: /* --- grayscale for each pattern when center pixel not set/white --- */ 14666: static int grayscale0[] = { -1, /* [0] index not used */ 14667: WHT,WHT,WHT,WHT,WHT,WHT,WHT,WHT,WHT,WHT, /* 1-10 */ 14668: 64,WHT,WHT,128,115,128,WHT,WHT,WHT, 64, /* 11-20 */ 14669: /* 51,WHT,WHT,128,115,128,WHT,WHT,WHT, 64, */ /* 11-20 */ 14670: WHT,WHT,WHT, 64,WHT,WHT, 76, 64,102, 89, /* 21-30 */ 14671: 102,WHT,102,WHT,115,102,WHT, 89, 76,WHT, /* 31-40 */ 14672: 76,WHT,WHT, 76, 89,WHT, 89,WHT, 76,WHT,102, /* 41-51 */ 14673: -1 } ; /* --- end-of-grayscale0[] --- */ 14674: #endif 14675: #if 0 14676: /* --- 14677: * modified aapnm() grayscales (first try) 14678: * --- */ 14679: /* --- grayscale for each pattern when center pixel set/black --- */ 14680: static int grayscale1[] = { -1, /* [0] index not used */ 14681: BLK,BLK,BLK,BLK,242,230,GRY,BLK,BLK,BLK, /* 1-10 */ 14682: /* BLK,BLK,BLK,BLK,242,230,BLK,BLK,BLK,BLK, */ /* 1-10 */ 14683: BLK,BLK,217,230,217,230,204,BLK,BLK,166, /* 11-20 */ 14684: BLK,BLK,BLK,BLK,BLK,BLK,BLK,166,204,191, /* 21-30 */ 14685: /* BLK,BLK,BLK,BLK,BLK,BLK,178,166,204,191, */ /* 21-30 */ 14686: 204,BLK,204,BLK,217,204,BLK,191,GRY,BLK, /* 31-40 */ 14687: /* 204,BLK,204,191,217,204,BLK,191,178,BLK, */ /* 31-40 */ 14688: 178,BLK,BLK,178,191,BLK,BLK,BLK,178,BLK,204, /* 41-51 */ 14689: /* 178,BLK,BLK,178,191,BLK,191,BLK,178,BLK,204, */ /* 41-51 */ 14690: -1 } ; /* --- end-of-grayscale1[] --- */ 14691: /* --- grayscale for each pattern when center pixel not set/white --- */ 14692: static int grayscale0[] = { -1, /* [0] index not used */ 14693: WHT,WHT,WHT,WHT,WHT,WHT,WHT,WHT,WHT,WHT, /* 1-10 */ 14694: GRY,WHT,WHT,128,115,128,WHT,WHT,WHT,GRY, /* 11-20 */ 14695: /* 51,WHT,WHT,128,115,128,WHT,WHT,WHT, 64, */ /* 11-20 */ 14696: WHT,WHT,WHT,GRY,WHT,WHT, 76, 64,102, 89, /* 21-30 */ 14697: /* WHT,WHT,WHT, 64,WHT,WHT, 76, 64,102, 89, */ /* 21-30 */ 14698: 102,WHT,102,WHT,115,102,WHT, 89,GRY,WHT, /* 31-40 */ 14699: /* 102,WHT,102,WHT,115,102,WHT, 89, 76,WHT, */ /* 31-40 */ 14700: 76,WHT,WHT,GRY, 89,WHT, 89,WHT, 76,WHT,102, /* 41-51 */ 14701: /* 76,WHT,WHT, 76, 89,WHT, 89,WHT, 76,WHT,102, */ /* 41-51 */ 14702: -1 } ; /* --- end-of-grayscale0[] --- */ 14703: #endif 14704: #if 0 14705: /* --- 14706: * these grayscales _exactly_ correspond to the aapnm() algorithm 14707: * --- */ 14708: /* --- grayscale for each pattern when center pixel set/black --- */ 14709: static int grayscale1[] = { -1, /* [0] index not used */ 14710: BLK,BLK,BLK,BLK,242,230,BLK,BLK,BLK,BLK, /* 1-10 */ 14711: BLK,BLK,217,230,217,230,204,BLK,BLK,166, /* 11-20 */ 14712: BLK,BLK,BLK,BLK,BLK,BLK,178,166,204,191, /* 21-30 */ 14713: 204,BLK,204,191,217,204,BLK,191,178,BLK, /* 31-40 */ 14714: 178,BLK,BLK,178,191,BLK,191,BLK,178,BLK,204, /* 41-51 */ 14715: -1 } ; /* --- end-of-grayscale1[] --- */ 14716: /* --- grayscale for each pattern when center pixel not set/white --- */ 14717: static int grayscale0[] = { -1, /* [0] index not used */ 14718: WHT,WHT,WHT,WHT,WHT,WHT,WHT,WHT,WHT,WHT, /* 1-10 */ 14719: 51,WHT,WHT,128,115,128,WHT,WHT,WHT, 64, /* 11-20 */ 14720: WHT,WHT,WHT, 64,WHT,WHT, 76, 64,102, 89, /* 21-30 */ 14721: 102,WHT,102,WHT,115,102,WHT, 89, 76,WHT, /* 31-40 */ 14722: 76,WHT,WHT, 76, 89,WHT, 89,WHT, 76,WHT,102, /* 41-51 */ 14723: -1 } ; /* --- end-of-grayscale0[] --- */ 14724: #endif 14725: /* ------------------------------------------------------------------------- 14726: look up grayscale for gridnum 14727: -------------------------------------------------------------------------- */ 14728: /* --- first check input --- */ 14729: if ( gridnum<0 || gridnum>511 ) goto end_of_job; /* gridnum out of bounds */ 14730: /* --- look up pattern number, 1-51, corresponding to input gridnum --- */ 14731: pattern = aapatternnum(gridnum); /* look up pattern number */ 14732: if ( pattern<1 || pattern>51 ) goto end_of_job; /* some internal error */ 14733: if ( ispatternnumcount ) { /* counts being accumulated */ 14734: if (iscenter) patternnumcount1[pattern] += 1; /* bump diagnostic count */ 14735: else patternnumcount0[pattern] += 1; } 14736: /* --- look up grayscale for this pattern --- */ 14737: grayscale = ( iscenter? grayscale1[pattern] : grayscale0[pattern] ); 14738: end_of_job: 14739: return ( grayscale ); /* back to caller with grayscale */ 14740: } /* --- end-of-function aalookup() --- */ 14741: 14742: 14743: /* ========================================================================== 14744: * Function: aalowpasslookup ( rp, bytemap, grayscale ) 14745: * Purpose: calls aalookup() for each pixel in rp->bitmap 14746: * to create anti-aliased bytemap 14747: * -------------------------------------------------------------------------- 14748: * Arguments: rp (I) raster * to raster whose bitmap 14749: * is to be anti-aliased 14750: * bytemap (O) intbyte * to bytemap, calculated 14751: * by calling aalookup() for each pixel 14752: * in rp->bitmap 14753: * grayscale (I) int containing number of grayscales 14754: * to be calculated, 0...grayscale-1 14755: * (should typically be given as 256) 14756: * -------------------------------------------------------------------------- 14757: * Returns: ( int ) 1=success, 0=any error 14758: * -------------------------------------------------------------------------- 14759: * Notes: o 14760: * ======================================================================= */ 14761: /* --- entry point --- */ 14762: int aalowpasslookup (raster *rp, intbyte *bytemap, int grayscale) 14763: { 14764: /* ------------------------------------------------------------------------- 14765: Allocations and Declarations 14766: -------------------------------------------------------------------------- */ 14767: int width=rp->width, height=rp->height, /* width, height of raster */ 14768: icol = 0, irow = 0, imap = (-1); /* width, height, bitmap indexes */ 14769: int bgbitval=0 /*, fgbitval=1*/; /* background, foreground bitval */ 14770: int bitval=0, /* value of rp bit at irow,icol */ 14771: aabyteval=0; /* antialiased (or unchanged) value*/ 14772: int gridnum=0, aagridnum(), /* grid# for 3x3 grid at irow,icol */ 14773: aalookup(); /* table look up antialiased value*/ 14774: /* ------------------------------------------------------------------------- 14775: generate bytemap by table lookup for each pixel of bitmap 14776: -------------------------------------------------------------------------- */ 14777: for ( irow=0; irow<height; irow++ ) 14778: for ( icol=0; icol<width; icol++ ) 14779: { 14780: /* --- get gridnum and center bit value, init aabyteval --- */ 14781: gridnum = aagridnum(rp,irow,icol); /*grid# coding 3x3 grid at irow,icol*/ 14782: bitval = (gridnum&1); /* center bit set if gridnum odd */ 14783: aabyteval = (intbyte)(bitval==bgbitval?0:grayscale-1); /* default aa val */ 14784: imap++; /* first bump bitmap[] index */ 14785: bytemap[imap] = (intbyte)(aabyteval); /* init antialiased pixel */ 14786: /* --- look up antialiased value for this grid --- */ 14787: aabyteval = aalookup(gridnum); /* look up on grid# */ 14788: if ( aabyteval>=0 && aabyteval<=255 ) /* check for success */ 14789: bytemap[imap] = (intbyte)(aabyteval); /* init antialiased pixel */ 14790: } /* --- end-of-for(irow,icol) --- */ 14791: ispatternnumcount = 0; /* accumulate counts only once */ 14792: /* ------------------------------------------------------------------------- 14793: Back to caller with gray-scale anti-aliased bytemap 14794: -------------------------------------------------------------------------- */ 14795: /*end_of_job:*/ 14796: return ( 1 ); 14797: } /* --- end-of-function aalowpasslookup() --- */ 14798: 14799: 14800: /* ========================================================================== 14801: * Function: aasupsamp ( rp, aa, sf, grayscale ) 14802: * Purpose: calculates a supersampled anti-aliased bytemap 14803: * for rp->bitmap, with each byte 0...grayscale-1 14804: * -------------------------------------------------------------------------- 14805: * Arguments: rp (I) raster * to raster whose bitmap 14806: * is to be anti-aliased 14807: * aa (O) address of raster * to supersampled bytemap, 14808: * calculated by supersampling rp->bitmap 14809: * sf (I) int containing supersampling shrinkfactor 14810: * grayscale (I) int containing number of grayscales 14811: * to be calculated, 0...grayscale-1 14812: * (should typically be given as 256) 14813: * -------------------------------------------------------------------------- 14814: * Returns: ( int ) 1=success, 0=any error 14815: * -------------------------------------------------------------------------- 14816: * Notes: o If the center point of the box being averaged is black, 14817: * then the entire "average" is forced black (grayscale-1) 14818: * regardless of the surrounding points. This is my attempt 14819: * to avoid a "washed-out" appearance of thin (one-pixel-wide) 14820: * lines, which would otherwise turn from black to a gray shade. 14821: * ======================================================================= */ 14822: /* --- entry point --- */ 14823: int aasupsamp (raster *rp, raster **aa, int sf, int grayscale) 14824: { 14825: /* ------------------------------------------------------------------------- 14826: Allocations and Declarations 14827: -------------------------------------------------------------------------- */ 14828: int status = 0; /* 1=success, 0=failure to caller */ 14829: int rpheight=rp->height, rpwidth=rp->width, /*bitmap raster dimensions*/ 14830: heightrem=0, widthrem=0, /* rp+rem is a multiple of shrinkf */ 14831: aaheight=0, aawidth=0, /* supersampled dimensions */ 14832: aapixsz=8; /* output pixels are 8-bit bytes */ 14833: int maxaaval=(-9999), /* max grayscale val set in matrix */ 14834: isrescalemax=1; /* 1=rescale maxaaval to grayscale */ 14835: int irp=0,jrp=0, iaa=0,jaa=0, iwt=0,jwt=0; /*indexes, i=width j=height*/ 14836: raster *aap=NULL, *new_raster(); /* raster for supersampled image */ 14837: raster *aaweights(); /* get weight matrix applied to rp */ 14838: static raster *aawts = NULL; /* aaweights() resultant matrix */ 14839: static int prevshrink = NOVALUE, /* shrinkfactor from previous call */ 14840: sumwts = 0; /* sum of weights */ 14841: static int blackfrac = 40, /* force black if this many pts are */ 14842: /*grayfrac = 20,*/ 14843: maxwt = 10, /* max weight in weight matrix */ 14844: minwtfrac=10, maxwtfrac=70; /* force light pts white, dark black*/ 14845: int type_raster(), type_bytemap(); /* debugging display routines */ 14846: int delete_raster(); /* delete old rasters */ 14847: /* ------------------------------------------------------------------------- 14848: Initialization 14849: -------------------------------------------------------------------------- */ 14850: /* --- check args --- */ 14851: if ( aa == NULL ) goto end_of_job; /* no ptr for return output arg */ 14852: *aa = NULL; /* init null ptr for error return */ 14853: if ( rp == NULL /* no ptr to input arg */ 14854: || sf < 1 /* invalid shrink factor */ 14855: || grayscale < 2 ) goto end_of_job; /* invalid grayscale */ 14856: /* --- get weight matrix (or use current one) --- */ 14857: if ( sf != prevshrink ) /* have new shrink factor */ 14858: { if ( aawts != NULL ) /* have unneeded weight matrix */ 14859: delete_raster(aawts); /* so free it */ 14860: sumwts = 0; /* reinitialize sum of weights */ 14861: aawts = aaweights(sf,sf); /* get new weight matrix */ 14862: if ( aawts != NULL ) /* got weight matrix okay*/ 14863: for ( jwt=0; jwt<sf; jwt++ ) /* for each row */ 14864: for ( iwt=0; iwt<sf; iwt++ ) /* and each column */ 14865: { int wt = (int)(getpixel(aawts,jwt,iwt)); /* weight */ 14866: if ( wt > maxwt ) /* don't overweight center pts */ 14867: { wt = maxwt; /* scale it back */ 14868: setpixel(aawts,jwt,iwt,wt); } /* and replace it in matrix */ 14869: sumwts += wt; } /* add weight to sum */ 14870: prevshrink = sf; } /* save new shrink factor */ 14871: if ( msgfp!=NULL && msglevel>=999 ) 14872: { fprintf(msgfp,"aasupsamp> sf=%d, sumwts=%d weights=...\n", sf,sumwts); 14873: type_bytemap((intbyte *)aawts->pixmap,grayscale, 14874: aawts->width,aawts->height,msgfp); } 14875: /* --- calculate supersampled height,width and allocate output raster */ 14876: heightrem = rpheight%sf; /* remainder after division... */ 14877: widthrem = rpwidth%sf; /* ...by shrinkfactor */ 14878: aaheight = 1+(rpheight+sf-(heightrem+1))/sf; /* ss height */ 14879: aawidth = 1+(rpwidth+sf-(widthrem+1))/sf; /* ss width */ 14880: if ( msgfp!=NULL && msglevel>=999 ) 14881: { fprintf(msgfp,"aasupsamp> rpwid,ht=%d,%d wd,htrem=%d,%d aawid,ht=%d,%d\n", 14882: rpwidth,rpheight, widthrem,heightrem, aawidth,aaheight); 14883: fprintf(msgfp,"aasupsamp> dump of original bitmap image...\n"); 14884: type_raster(rp,msgfp); } /* ascii image of rp raster */ 14885: if ( (aap = new_raster(aawidth,aaheight,aapixsz)) /* alloc output raster*/ 14886: == NULL ) goto end_of_job; /* quit if alloc fails */ 14887: /* ------------------------------------------------------------------------- 14888: Step through rp->bitmap, applying aawts to each "submatrix" of bitmap 14889: -------------------------------------------------------------------------- */ 14890: for ( jaa=0,jrp=(-(heightrem+1)/2); jrp<rpheight; jrp+=sf ) /* height */ 14891: { 14892: for ( iaa=0,irp=(-(widthrem+1)/2); irp<rpwidth; irp+=sf ) /* width */ 14893: { 14894: int aaval=0; /* weighted rpvals */ 14895: int nrp=0, mrp=0; /* #rp bits set, #within matrix */ 14896: for ( jwt=0; jwt<sf; jwt++ ) 14897: for ( iwt=0; iwt<sf; iwt++ ) 14898: { 14899: int i=irp+iwt, j=jrp+jwt; /* rp->pixmap point */ 14900: int rpval = 0; /* rp->pixmap value at i,j */ 14901: if ( i>=0 && i<rpwidth /* i within actual pixmap */ 14902: && j>=0 && j<rpheight ) /* ditto j */ 14903: { mrp++; /* count another bit within matrix */ 14904: rpval = (int)(getpixel(rp,j,i)); } /* get actual pixel value */ 14905: if ( rpval != 0 ) 14906: { nrp++; /* count another bit set */ 14907: aaval += (int)(getpixel(aawts,jwt,iwt)); } /* sum weighted vals */ 14908: } /* --- end-of-for(iwt,jwt) --- */ 14909: if ( aaval > 0 ) /*normalize and rescale non-zero val*/ 14910: { int aafrac = (100*aaval)/sumwts; /* weighted percent of black points */ 14911: /*if((100*nrp)/mrp >=blackfrac)*/ /* many black interior pts */ 14912: if( aafrac >= maxwtfrac ) /* high weight of sampledblack pts */ 14913: aaval = grayscale-1; /* so set supersampled pt black */ 14914: else if( aafrac <= minwtfrac ) /* low weight of sampledblack pts */ 14915: aaval = 0; /* so set supersampled pt white */ 14916: else /* rescale calculated weight */ 14917: aaval = ((sumwts/2 - 1) + (grayscale-1)*aaval)/sumwts; } 14918: maxaaval = max2(maxaaval,aaval); /* largest aaval so far */ 14919: if ( msgfp!=NULL && msglevel>=999 ) 14920: fprintf(msgfp,"aasupsamp> jrp,irp=%d,%d jaa,iaa=%d,%d" 14921: " mrp,nrp=%d,%d aaval=%d\n", 14922: jrp,irp, jaa,iaa, mrp,nrp, aaval); 14923: if ( jaa<aaheight && iaa<aawidth ) /* bounds check */ 14924: setpixel(aap,jaa,iaa,aaval); /*weighted val in supersamp raster*/ 14925: else if( msgfp!=NULL && msglevel>=9 ) /* emit error if out-of-bounds */ 14926: fprintf(msgfp,"aasupsamp> Error: aaheight,aawidth=%d,%d jaa,iaa=%d,%d\n", 14927: aaheight,aawidth, jaa,iaa); 14928: iaa++; /* bump aa col index */ 14929: } /* --- end-of-for(irp) --- */ 14930: jaa++; /* bump aa row index */ 14931: } /* --- end-of-for(jrp) --- */ 14932: /* --- rescale supersampled image so darkest points become black --- */ 14933: if ( isrescalemax ) /* flag set to rescale maxaaval */ 14934: { 14935: double scalef = ((double)(grayscale-1))/((double)maxaaval); 14936: for ( jaa=0; jaa<aaheight; jaa++ ) /* height */ 14937: for ( iaa=0; iaa<aawidth; iaa++ ) /* width */ 14938: { int aafrac, aaval = getpixel(aap,jaa,iaa); /* un-rescaled value */ 14939: aaval = (int)(0.5+((double)aaval)*scalef); /*multiply by scale factor*/ 14940: aafrac = (100*aaval)/(grayscale-1); /* fraction of blackness */ 14941: if( aafrac >= blackfrac ) /* high weight of sampledblack pts */ 14942: aaval = grayscale-1; /* so set supersampled pt black */ 14943: else if( 0&&aafrac <= minwtfrac ) /* low weight of sampledblack pts */ 14944: aaval = 0; /* so set supersampled pt white */ 14945: setpixel(aap,jaa,iaa,aaval); } /* replace rescaled val in raster */ 14946: } /* --- end-of-if(isrescalemax) --- */ 14947: *aa = aap; /* return supersampled image*/ 14948: status = 1; /* set successful status */ 14949: if ( msgfp!=NULL && msglevel>=999 ) 14950: { fprintf(msgfp,"aasupsamp> anti-aliased image...\n"); 14951: type_bytemap((intbyte *)aap->pixmap,grayscale, 14952: aap->width,aap->height,msgfp); fflush(msgfp); } 14953: /* ------------------------------------------------------------------------- 14954: Back to caller with gray-scale anti-aliased bytemap 14955: -------------------------------------------------------------------------- */ 14956: end_of_job: 14957: return ( status ); 14958: } /* --- end-of-function aasupsamp() --- */ 14959: 14960: 14961: /* ========================================================================== 14962: * Function: aacolormap ( bytemap, nbytes, colors, colormap ) 14963: * Purpose: searches bytemap, returning a list of its discrete values 14964: * in ascending order in colors[], and returning an "image" 14965: * of bytemap (where values are replaced by colors[] 14966: * indexes) in colormap[]. 14967: * -------------------------------------------------------------------------- 14968: * Arguments: bytemap (I) intbyte * to bytemap containing 14969: * grayscale values (usually 0=white 14970: * through 255=black) for which colors[] 14971: * and colormap[] will be constructed. 14972: * nbytes (I) int containing #bytes in bytemap 14973: * (usually just #rows * #cols) 14974: * colors (O) intbyte * (to be interpreted as ints) 14975: * returning a list of the discrete/different 14976: * values in bytemap, in ascending value order, 14977: * and with gamma correction applied 14978: * colormap (O) intbyte * returning a bytemap "image", 14979: * i.e., in one-to-one pixel correspondence 14980: * with bytemap, but where the values have been 14981: * replaced with corresponding colors[] indexes. 14982: * -------------------------------------------------------------------------- 14983: * Returns: ( int ) #colors in colors[], or 0 for any error 14984: * -------------------------------------------------------------------------- 14985: * Notes: o 14986: * ======================================================================= */ 14987: /* --- entry point --- */ 14988: int aacolormap ( intbyte *bytemap, int nbytes, 14989: intbyte *colors, intbyte *colormap ) 14990: { 14991: /* ------------------------------------------------------------------------- 14992: Allocations and Declarations 14993: -------------------------------------------------------------------------- */ 14994: int ncolors = 0, /* #different values in bytemap */ 14995: igray, grayscale = 256; /* bytemap contains intbyte's */ 14996: intbyte *bytevalues = NULL; /* 1's where bytemap contains value*/ 14997: int ibyte; /* bytemap/colormap index */ 14998: int isscale = 0, /* true to scale largest val to 255*/ 14999: isgamma = 1; /* true to apply gamma correction */ 15000: int maxcolors = 0; /* maximum ncolors */ 15001: /* ------------------------------------------------------------------------- 15002: Accumulate colors[] from values occurring in bytemap 15003: -------------------------------------------------------------------------- */ 15004: /* --- initialization --- */ 15005: if ( (bytevalues = (intbyte *)malloc(grayscale)) /*alloc bytevalues*/ 15006: == NULL ) goto end_of_job; /* signal error if malloc() failed */ 15007: memset(bytevalues,0,grayscale); /* zero out bytevalues */ 15008: /* --- now set 1's at offsets corresponding to values found in bytemap --- */ 15009: for ( ibyte=0; ibyte<nbytes; ibyte++ ) /* for each byte in bytemap */ 15010: bytevalues[(int)bytemap[ibyte]] = 1; /*use its value to index bytevalues*/ 15011: /* --- collect the 1's indexes in colors[] --- */ 15012: for ( igray=0; igray<grayscale; igray++ ) /* check all possible values */ 15013: if ( (int)bytevalues[igray] ) /*bytemap contains igray somewheres*/ 15014: { colors[ncolors] = (intbyte)igray; /* so store igray in colors */ 15015: bytevalues[igray] = (intbyte)ncolors; /* save colors[] index */ 15016: if ( maxcolors>0 && ncolors>=maxcolors ) /* too many color indexes */ 15017: bytevalues[igray] = (intbyte)(maxcolors-1); /*so scale back to max*/ 15018: ncolors++; } /* and bump #colors */ 15019: /* --- rescale colors so largest, colors[ncolors-1], is black --- */ 15020: if ( isscale ) /* only rescale if requested */ 15021: if ( ncolors > 1 ) /* and if not a "blank" raster */ 15022: if ( colors[ncolors-1] > 0 ) /*and at least one pixel non-white*/ 15023: { 15024: /* --- multiply each colors[] by factor that scales largest to 255 --- */ 15025: double scalefactor = ((double)(grayscale-1))/((double)colors[ncolors-1]); 15026: for ( igray=1; igray<ncolors; igray++ ) /* re-scale each colors[] */ 15027: { colors[igray] = min2(grayscale-1,(int)(scalefactor*colors[igray]+0.5)); 15028: if (igray>5) colors[igray] = min2(grayscale-1,colors[igray]+2*igray); } 15029: } /* --- end-of-if(isscale) --- */ 15030: /* --- apply gamma correction --- */ 15031: if ( isgamma /* only gamma correct if requested */ 15032: && gammacorrection > 0.0001 ) /* and if we have gamma correction */ 15033: if ( ncolors > 1 ) /* and if not a "blank" raster */ 15034: if ( colors[ncolors-1] > 0 ) /*and at least one pixel non-white*/ 15035: { 15036: for ( igray=1; igray<ncolors; igray++ ) { /*gamma correct each colors[]*/ 15037: int grayval = colors[igray], /* original 0=white to 255=black */ 15038: gmax = grayscale-1; /* should be 255 */ 15039: double dgray=((double)(gmax-grayval))/((double)gmax); /*0=black 1=white*/ 15040: dgray = pow(dgray,(1.0/gammacorrection)); /* apply gamma correction */ 15041: grayval = (int)( gmax*(1.0-dgray) + 0.5 ); /* convert back to grayval */ 15042: colors[igray] = grayval; } /* store back in colors[] */ 15043: } /* --- end-of-if(isgamma) --- */ 15044: /* ------------------------------------------------------------------------- 15045: Construct colormap 15046: -------------------------------------------------------------------------- */ 15047: for ( ibyte=0; ibyte<nbytes; ibyte++ ) /* for each byte in bytemap */ 15048: colormap[ibyte] = bytevalues[(int)bytemap[ibyte]]; /*index for this value*/ 15049: /* ------------------------------------------------------------------------- 15050: back to caller with #colors, or 0 for any error 15051: -------------------------------------------------------------------------- */ 15052: end_of_job: 15053: if ( bytevalues != NULL ) free(bytevalues); /* free working memory */ 15054: if ( maxcolors>0 && ncolors>maxcolors ) /* too many color indexes */ 15055: ncolors = maxcolors; /* return maximum to caller */ 15056: return ( ncolors ); /* back with #colors, or 0=error */ 15057: } /* --- end-of-function aacolormap() --- */ 15058: 15059: 15060: /* ========================================================================== 15061: * Function: aaweights ( width, height ) 15062: * Builds "canonical" weight matrix, width x height, in a raster 15063: * (see Notes below for discussion). 15064: * -------------------------------------------------------------------------- 15065: * Arguments: width (I) int containing width (#cols) of returned 15066: * raster/matrix of weights 15067: * height (I) int containing height (#rows) of returned 15068: * raster/matrix of weights 15069: * -------------------------------------------------------------------------- 15070: * Returns: ( raster * ) ptr to raster containing width x height 15071: * weight matrix, or NULL for any error 15072: * -------------------------------------------------------------------------- 15073: * Notes: o For example, given width=7, height=5, builds the matrix 15074: * 1 2 3 4 3 2 1 15075: * 2 4 6 8 6 4 2 15076: * 3 6 9 12 9 6 3 15077: * 2 4 6 8 6 4 2 15078: * 1 2 3 4 3 2 1 15079: * If an even dimension given, the two center numbers stay 15080: * the same, e.g., 123321 for the top row if width=6. 15081: * o For an odd square n x n matrix, the sum of all n^2 15082: * weights will be ((n+1)/2)^4. 15083: * o The largest weight (in the allocated pixsz=8 raster) is 255, 15084: * so the largest square matrix is 31 x 31. Any weight that 15085: * tries to grow beyond 255 is held constant at 255. 15086: * o A new_raster(), pixsz=8, is allocated for the caller. 15087: * To avoid memory leaks, be sure to delete_raster() when done. 15088: * ======================================================================= */ 15089: /* --- entry point --- */ 15090: raster *aaweights ( int width, int height ) 15091: { 15092: /* ------------------------------------------------------------------------- 15093: Allocations and Declarations 15094: -------------------------------------------------------------------------- */ 15095: raster *new_raster(), *weights=NULL; /* raster of weights returned */ 15096: int irow=0, icol=0, /* height, width indexes */ 15097: weight = 0; /*running weight, as per Notes above*/ 15098: /* ------------------------------------------------------------------------- 15099: Initialization 15100: -------------------------------------------------------------------------- */ 15101: /* --- allocate raster for weights --- */ 15102: if ( (weights = new_raster(width,height,8)) /* allocate 8-bit byte raster */ 15103: == NULL ) goto end_of_job; /* return NULL error if failed */ 15104: /* ------------------------------------------------------------------------- 15105: Fill weight matrix, as per Notes above 15106: -------------------------------------------------------------------------- */ 15107: for ( irow=0; irow<height; irow++ ) /* outer loop over rows */ 15108: for ( icol=0; icol<width; icol++ ) /* inner loop over cols */ 15109: { 15110: int jrow = height-irow-1, /* backwards irow, height-1,...,0 */ 15111: jcol = width-icol-1; /* backwards icol, width-1,...,0 */ 15112: weight = min2(irow+1,jrow+1) * min2(icol+1,jcol+1); /* weight */ 15113: if ( aaalgorithm == 1 ) weight=1; /* force equal weights */ 15114: setpixel(weights,irow,icol,min2(255,weight)); /*store weight in matrix*/ 15115: } /* --- end-of-for(irow,icol) --- */ 15116: end_of_job: 15117: return ( weights ); /* back with weights or NULL=error */ 15118: } /* --- end-of-function aaweights() --- */ 15119: 15120: 15121: /* ========================================================================== 15122: * Function: aawtpixel ( image, ipixel, weights, rotate ) 15123: * Purpose: Applies matrix of weights to the pixels 15124: * surrounding ipixel in image, rotated clockwise 15125: * by rotate degrees (typically 0 or 30). 15126: * -------------------------------------------------------------------------- 15127: * Arguments: image (I) raster * to bitmap (though it can be bytemap) 15128: * containing image with pixels to be averaged. 15129: * ipixel (I) int containing index (irow*width+icol) of 15130: * center pixel of image for weighted average. 15131: * weights (I) raster * to bytemap of relative weights 15132: * (0-255), whose dimensions (usually odd width 15133: * and odd height) determine the "subgrid" of 15134: * image surrounding ipixel to be averaged. 15135: * rotate (I) int containing degrees clockwise rotation 15136: * (typically 0 or 30), i.e., imagine weights 15137: * rotated clockwise and then averaging the 15138: * image pixels "underneath" it now. 15139: * -------------------------------------------------------------------------- 15140: * Returns: ( int ) 0-255 weighted average, or -1 for any error 15141: * -------------------------------------------------------------------------- 15142: * Notes: o The rotation matrix used (when requested) is 15143: * / x' \ / cos(theta) sin(theta)/a \ / x \ 15144: * | | = | | | | 15145: * \ y' / \ -a*sin(theta) cos(theta) / \ y / 15146: * where a=1 (current default) is the pixel (not screen) 15147: * aspect ratio width:height, and theta is rotate (converted 15148: * from degrees to radians). Then x=col,y=row are the integer 15149: * pixel coords relative to the input center ipixel, and 15150: * x',y' are rotated coords which aren't necessarily integer. 15151: * The actual pixel used is the one nearest x',y'. 15152: * ======================================================================= */ 15153: /* --- entry point --- */ 15154: int aawtpixel ( raster *image, int ipixel, raster *weights, int rotate ) 15155: { 15156: /* ------------------------------------------------------------------------- 15157: Allocations and Declarations 15158: -------------------------------------------------------------------------- */ 15159: int aaimgval = 0, /* weighted avg returned to caller */ 15160: totwts=0, sumwts=0; /* total of all wts, sum wts used */ 15161: int pixsz = image->pixsz, /* #bits per image pixel */ 15162: black1=1, black8=255, /* black for 1-bit, 8-bit pixels */ 15163: black = (pixsz==1? black1:black8), /* black value for our image */ 15164: scalefactor = (black1+black8-black), /* only scale 1-bit images */ 15165: iscenter = 0; /* set true if center pixel black */ 15166: /* --- grid dimensions and indexes --- */ 15167: int wtheight = weights->height, /* #rows in weight matrix */ 15168: wtwidth = weights->width, /* #cols in weight matrix */ 15169: imgheight = image->height, /* #rows in image */ 15170: imgwidth = image->width; /* #cols in image */ 15171: int wtrow, wtrow0 = wtheight/2, /* center row index for weights */ 15172: wtcol, wtcol0 = wtwidth/2, /* center col index for weights */ 15173: imgrow, imgrow0= ipixel/imgwidth, /* center row index for ipixel */ 15174: imgcol, imgcol0= ipixel-(imgrow0*imgwidth); /*center col for ipixel*/ 15175: /* --- rotated grid variables --- */ 15176: static int prevrotate = 0; /* rotate from previous call */ 15177: static double costheta = 1.0, /* cosine for previous rotate */ 15178: sintheta = 0.0; /* and sine for previous rotate */ 15179: double a = 1.0; /* default aspect ratio */ 15180: /* ------------------------------------------------------------------------- 15181: Initialization 15182: -------------------------------------------------------------------------- */ 15183: /* --- refresh trig functions for rotate when it changes --- */ 15184: if ( rotate != prevrotate ) /* need new sine/cosine */ 15185: { costheta = cos(((double)rotate)/57.29578); /*cos of rotate in radians*/ 15186: sintheta = sin(((double)rotate)/57.29578); /*sin of rotate in radians*/ 15187: prevrotate = rotate; } /* save current rotate as prev */ 15188: /* ------------------------------------------------------------------------- 15189: Calculate aapixel as weighted average over image points around ipixel 15190: -------------------------------------------------------------------------- */ 15191: for ( wtrow=0; wtrow<wtheight; wtrow++ ) 15192: for ( wtcol=0; wtcol<wtwidth; wtcol++ ) 15193: { 15194: /* --- allocations and declarations --- */ 15195: int wt = (int)getpixel(weights,wtrow,wtcol); /* weight for irow,icol */ 15196: int drow = wtrow - wtrow0, /* delta row offset from center */ 15197: dcol = wtcol - wtcol0; /* delta col offset from center */ 15198: int iscenter = 0; /* set true if center point black */ 15199: /* --- initialization --- */ 15200: totwts += wt; /* sum all weights */ 15201: /* --- rotate (if requested) --- */ 15202: if ( rotate != 0 ) /* non-zero rotation */ 15203: { 15204: /* --- apply rotation matrix to (x=dcol,y=drow) --- */ 15205: double dx=(double)dcol, dy=(double)drow, dtemp; /* need floats */ 15206: dtemp = dx*costheta + dy*sintheta/a; /* save new dx' */ 15207: dy = -a*dx*sintheta + dy*costheta; /* dy becomes new dy' */ 15208: dx = dtemp; /* just for notational convenience */ 15209: /* --- replace original (drow,dcol) with nearest rotated point --- */ 15210: drow = (int)(dy+0.5); /* round dy for nearest row */ 15211: dcol = (int)(dx+0.5); /* round dx for nearest col */ 15212: } /* --- end-of-if(rotate!=0) --- */ 15213: /* --- select image pixel to be weighted --- */ 15214: imgrow = imgrow0 + drow; /*apply displacement to center row*/ 15215: imgcol = imgcol0 + dcol; /*apply displacement to center col*/ 15216: /* --- if pixel in bounds, accumulate weighted average --- */ 15217: if ( imgrow>=0 && imgrow<imgheight ) /* row is in bounds */ 15218: if ( imgcol>=0 && imgcol<imgwidth ) /* and col is in bounds */ 15219: { 15220: /* --- accumulate weighted average --- */ 15221: int imgval = (int)getpixel(image,imgrow,imgcol); /* image value */ 15222: aaimgval += wt*imgval; /* weighted sum of image values */ 15223: sumwts += wt; /* and also sum weights used */ 15224: /* --- check if center image pixel black --- */ 15225: if ( drow==0 && dcol==0 ) /* this is center ipixel */ 15226: if ( imgval==black ) /* and it's black */ 15227: iscenter = 1; /* so set black center flag true */ 15228: } /* --- end-of-if(bounds checks ok) --- */ 15229: } /* --- end-of-for(irow,icol) --- */ 15230: if ( 0 && iscenter ) /* center point is black */ 15231: aaimgval = black8; /* so force average black */ 15232: else /* center point not black */ 15233: aaimgval = /* 0=white ... black */ 15234: ((totwts/2 - 1) + scalefactor*aaimgval)/totwts; /* not /sumwts; */ 15235: /*end_of_job:*/ 15236: return ( aaimgval ); 15237: } /* --- end-of-function aawtpixel() --- */ 15238: 15239: 15240: /* ========================================================================== 15241: * Function: mimetexsetmsg ( newmsglevel, newmsgfp ) 15242: * Purpose: Sets msglevel and msgfp, usually called from 15243: * an external driver (i.e., DRIVER not defined 15244: * in this module). 15245: * -------------------------------------------------------------------------- 15246: * Arguments: newmsglevel (I) int containing new msglevel 15247: * (unchanged if newmsglevel<0) 15248: * newmsgfp (I) FILE * containing new msgfp 15249: * (unchanged if newmsgfp=NULL) 15250: * -------------------------------------------------------------------------- 15251: * Returns: ( int ) always 1 15252: * -------------------------------------------------------------------------- 15253: * Notes: o 15254: * ======================================================================= */ 15255: /* --- entry point --- */ 15256: int mimetexsetmsg ( int newmsglevel, FILE *newmsgfp ) 15257: { 15258: /* ------------------------------------------------------------------------- 15259: set msglevel and msgfp 15260: -------------------------------------------------------------------------- */ 15261: if ( newmsglevel >= 0 ) msglevel = newmsglevel; 15262: if ( newmsgfp != NULL ) msgfp = newmsgfp; 15263: return ( 1 ); 15264: } /* --- end-of-function mimetexsetmsg() --- */ 15265: #endif /* PART3 */ 15266: 15267: /* --- 15268: * PART1 15269: * ------ */ 15270: #if !defined(PARTS) || defined(PART1) 15271: #ifdef DRIVER 15272: /* ========================================================================== 15273: * Function: main() driver for mimetex.c 15274: * Purpose: emits a mime xbitmap or gif image of a LaTeX math expression 15275: * entered either as 15276: * (1) html query string from a browser (most typical), or 15277: * (2) a query string from an html <form method="get"> 15278: * whose <input name="formdata"> (mostly for demo), or 15279: * (3) command-line arguments (mostly to test). 15280: * If no input supplied, expression defaults to "f(x)=x^2", 15281: * treated as test (input method 3). 15282: * If args entered on command-line (or if no input supplied), 15283: * output is (usually) human-viewable ascii raster images on 15284: * stdout rather than the usual mime xbitmaps or gif images. 15285: * -------------------------------------------------------------------------- 15286: * Command-Line Arguments: 15287: * When running mimeTeX from the command-line, rather than 15288: * from a browser, syntax is 15289: * ./mimetex [-d ] dump gif to stdout 15290: * [expression expression, e.g., x^2+y^2, 15291: * |-f input_file] or read expression from file 15292: * [-m msglevel] verbosity of debugging output 15293: * [-s fontsize] default fontsize, 0-5 15294: * -d Rather than ascii debugging output, mimeTeX dumps the 15295: * actual gif (or xbitmap) to stdout, e.g., 15296: * ./mimetex -d x^2+y^2 > expression.gif 15297: * creates a gif file containing an image of x^2+y^2 15298: * -f Reads expression from input_file, and automatically 15299: * assumes -d switch. The input_file may contain the 15300: * expression on one line or spread out over many lines. 15301: * MimeTeX will concatanate all lines from input_file 15302: * to construct one long expression. Blanks, tabs, and 15303: * newlines will just be ignored. 15304: * -m 0-99, controls verbosity level for debugging output 15305: * (usually used only while testing code). 15306: * -s Font size, 0-5. As usual, the font size can 15307: * also be specified in the expression by a leading 15308: * preamble terminated by $, e.g., 3$f(x)=x^2 displays 15309: * f(x)=x^2 at font size 3. Default font size is 2. 15310: * -------------------------------------------------------------------------- 15311: * Exits: 0=success, 1=some error 15312: * -------------------------------------------------------------------------- 15313: * Notes: o For an executable that emits mime xbitmaps, compile as 15314: * cc -DXBITMAP mimetex.c -lm -o mimetex.cgi 15315: * or, alternatively, for an executable that emits gif images 15316: * cc -DGIF mimetex.c gifsave.c -lm -o mimetex.cgi 15317: * or for gif images with anti-aliasing 15318: * cc -DGIF -DAA mimetex.c gifsave.c -lm -o mimetex.cgi 15319: * See Notes at top of file for other compile-line -D options. 15320: * o Move executable to your cgi-bin directory and either 15321: * point your browser to it directly in the form 15322: * http://www.yourdomain.com/cgi-bin/mimetex.cgi?3$f(x)=x^2 15323: * or put a tag in your html document of the form 15324: * <img src="../cgi-bin/mimetex.cgi?3$f(x)=x^2" 15325: * border=0 align=absmiddle> 15326: * where f(x)=x^2 (or any other expression) will be displayed 15327: * either as a mime xbitmap or gif image (as per -D flag). 15328: * ======================================================================= */ 15329: 15330: /* ------------------------------------------------------------------------- 15331: header files and other data 15332: -------------------------------------------------------------------------- */ 15333: /* --- (additional) standard headers --- */ 15334: /* --- other data --- */ 15335: #ifdef DUMPENVIRON 15336: extern char **environ; /* environment information */ 15337: #endif 15338: 15339: /* ------------------------------------------------------------------------- 15340: globals for gif and png callback functions 15341: -------------------------------------------------------------------------- */ 15342: GLOBAL(raster,*bitmap_raster,NULL); /* use 0/1 bitmap image or */ 15343: GLOBAL(intbyte,*colormap_raster,NULL); /* anti-aliased color indexes */ 15344: GLOBAL(int,raster_width,0); /* width of final/displayed image */ 15345: GLOBAL(int,raster_height,0); /* height of final/displayed image */ 15346: GLOBAL(int,raster_baseline,0); /* baseline of final/displayed image*/ 15347: /* --- anti-aliasing flags (needed by GetPixel() as well as main()) --- */ 15348: #ifdef AA /* if anti-aliasing requested */ 15349: #define ISAAVALUE 1 /* turn flag on */ 15350: #else 15351: #define ISAAVALUE 0 /* else turn flag off */ 15352: #endif 15353: GLOBAL(int,isaa,ISAAVALUE); /* set anti-aliasing flag */ 15354: 15355: /* ------------------------------------------------------------------------- 15356: logging data structure, and default data to be logged 15357: -------------------------------------------------------------------------- */ 15358: /* --- logging data structure --- */ 15359: #define logdata struct logdata_struct /* "typedef" for logdata_struct*/ 15360: logdata 15361: { 15362: /* ----------------------------------------------------------------------- 15363: environment variable name, max #chars to display, min msglevel to display 15364: ------------------------------------------------------------------------ */ 15365: char *name; /* environment variable name */ 15366: int maxlen; /* max #chars to display */ 15367: int msglevel; /* min msglevel to display data */ 15368: } ; /* --- end-of-logdata_struct --- */ 15369: /* --- data logged by mimeTeX --- */ 15370: STATIC logdata mimelog[] 15371: #ifdef INITVALS 15372: = 15373: { 15374: /* ------ variable ------ maxlen msglevel ----- */ 15375: { "QUERY_STRING", 999, 4 }, 15376: { "REMOTE_ADDR", 999, 3 }, 15377: { "HTTP_REFERER", 999, 3 }, 15378: { "REQUEST_URI", 999, 5 }, 15379: { "HTTP_USER_AGENT", 999, 3 }, 15380: { "HTTP_X_FORWARDED_FOR", 999, 3 }, 15381: { NULL, -1, -1 } /* trailer record */ 15382: } /* --- end-of-mimelog[] --- */ 15383: #endif 15384: ; 15385: 15386: 15387: /* --- entry point --- */ 15388: int main ( int argc, char *argv[] 15389: #ifdef DUMPENVP 15390: , char *envp[] 15391: #endif 15392: ) 15393: { 15394: /* ------------------------------------------------------------------------- 15395: Allocations and Declarations 15396: -------------------------------------------------------------------------- */ 15397: /* --- expression to be emitted --- */ 15398: static char exprbuffer[MAXEXPRSZ+1] = "f(x)=x^2"; /* input TeX expression */ 15399: char *expression = exprbuffer; /* ptr to expression */ 15400: int size = NORMALSIZE; /* default font size */ 15401: char *query = getenv("QUERY_STRING"); /* getenv("QUERY_STRING") result */ 15402: char *mimeprep(); /* preprocess expression */ 15403: int unescape_url(); /* convert %xx's to ascii chars */ 15404: int emitcache(); /* emit cached image if it exists */ 15405: int isquery = 0, /* true if input from QUERY_STRING */ 15406: isqempty = 0, /* true if query string empty */ 15407: isqforce = 0, /* true to force query emulation */ 15408: isqlogging = 0, /* true if logging in query mode */ 15409: isformdata = 0, /* true if input from html form */ 15410: isinmemory = 1, /* true to generate image in memory*/ 15411: isdumpimage = 0, /* true to dump image on stdout */ 15412: isdumpbuffer = 0; /* true to dump to memory buffer */ 15413: /* --- rasterization --- */ 15414: subraster *rasterize(), *sp=NULL; /* rasterize expression */ 15415: raster *border_raster(), *bp=NULL; /* put a border around raster */ 15416: int delete_subraster(); /* for clean-up at end-of-job */ 15417: int type_raster(), type_bytemap(), /* screen dump function prototypes */ 15418: xbitmap_raster(); /* mime xbitmap output function */ 15419: /* --- http_referer --- */ 15420: char *referer = REFERER; /* http_referer must contain this */ 15421: char *inputreferer = INPUTREFERER; /*http_referer's permitted to \input*/ 15422: int reflevels = REFLEVELS, urlncmp(); /* cmp http_referer,server_name */ 15423: int strreplace(); /* replace SERVER_NAME in errmsg */ 15424: char *urlprune(); /* prune referer_match */ 15425: struct { char *referer; int msgnum; } /* http_referer can't contain this */ 15426: denyreferer[] = { /* referer table to deny access to */ 15427: #ifdef DENYREFERER 15428: #include DENYREFERER /* e.g., {"",1}, for no referer */ 15429: #endif 15430: { NULL, -999 } }; /* trailer */ 15431: char *http_referer = getenv("HTTP_REFERER"), /* referer using mimeTeX */ 15432: *http_host = getenv("HTTP_HOST"), /* http host for mimeTeX */ 15433: *server_name = getenv("SERVER_NAME"), /* server hosting mimeTeX */ 15434: *referer_match = (!isempty(http_host)?http_host: /*match http_host*/ 15435: (!isempty(server_name)?server_name:(NULL))); /* or server_name */ 15436: int ishttpreferer = (isempty(http_referer)?0:1); 15437: int isstrstr(); /* search http_referer for referer */ 15438: int isinvalidreferer = 0; /* true for inavlid referer */ 15439: int norefmaxlen = NOREFMAXLEN; /*max query_string len if no referer*/ 15440: /* --- gif --- */ 15441: #if defined(GIF) 15442: int GetPixel(); /* feed pixels to gifsave library */ 15443: int GIF_Create(),GIF_CompressImage(),GIF_Close(); /* prototypes for... */ 15444: void GIF_SetColor(),GIF_SetTransparent(); /* ...gifsave enntry points */ 15445: #endif 15446: char *gif_outfile = (char *)NULL, /* gif output defaults to stdout */ 15447: gif_buffer[MAXGIFSZ] = "\000", /* or gif written in memory buffer */ 15448: cachefile[256] = "\000", /* full path and name to cache file*/ 15449: *md5str(); /* md5 has of expression */ 15450: int maxage = 7200; /* max-age is two hours */ 15451: int valign = (-9999); /*Vertical-Align:baseline-(height-1)*/ 15452: /* --- pbm/pgm (-g switch) --- */ 15453: int ispbmpgm = 0; /* true to write pbm/pgm file */ 15454: int type_pbmpgm(), ptype=0; /* entry point, graphic format */ 15455: char *pbm_outfile = (char *)NULL; /* output file defaults to stdout */ 15456: /* --- anti-aliasing --- */ 15457: intbyte *bytemap_raster = NULL, /* anti-aliased bitmap */ 15458: colors[256]; /* grayscale vals in bytemap */ 15459: int aalowpass(), aapnm(), /*lowpass filters for anti-aliasing*/ 15460: grayscale = 256; /* 0-255 grayscales in 8-bit bytes */ 15461: int ncolors=2, /* #colors (2=b&w) */ 15462: aacolormap(); /* build colormap from bytemap */ 15463: int ipattern; /*patternnumcount[] index diagnostic*/ 15464: /* --- advertisement preprocessing --- */ 15465: int advertisement(), crc16(); /*wrap expression in advertisement*/ 15466: char *adtemplate = NULL; /* usually use default message */ 15467: char *host_showad = HOST_SHOWAD; /* show ads only on this host */ 15468: /* --- messages --- */ 15469: char logfile[256] = LOGFILE, /*log queries if msglevel>=LOGLEVEL*/ 15470: cachelog[256] = CACHELOG; /* cached image log in cachepath/ */ 15471: char *timestamp(); /* time stamp for logged messages */ 15472: char *strdetex(); /* remove math chars from messages */ 15473: int logger(); /* logs environ variables */ 15474: int ismonth(); /* check argv[0] for current month */ 15475: char *progname = (argc>0?argv[0]:"noname"); /* name program executed as */ 15476: char *dashes = /* separates logfile entries */ 15477: "--------------------------------------------------------------------------"; 15478: char *invalid_referer_msg = msgtable[invmsgnum]; /*msg to invalid referer*/ 15479: char *invalid_referer_match = msgtable[refmsgnum]; /*referer isn't host*/ 15480: /* ------------------------------------------------------------------------- 15481: initialization 15482: -------------------------------------------------------------------------- */ 15483: /* --- run optional system command string --- */ 15484: #ifdef SYSTEM 15485: system(SYSTEM); 15486: #endif 15487: /* --- set global variables --- */ 15488: daemonlevel++; /* signal other funcs to reset */ 15489: msgfp = stdout; /* for comamnd-line mode output */ 15490: isss = issupersampling; /* set supersampling flag */ 15491: isemitcontenttype = 1; /* true to emit mime content-type */ 15492: iscachecontenttype = 0; /* true to cache mime content-type */ 15493: *contenttype = '\000'; /* reset content-type:, etc. cache */ 15494: isnomath = 0; /* true to inhibit math mode */ 15495: seclevel = SECURITY; /* overall security level */ 15496: inputseclevel = INPUTSECURITY; /* security level for \input{} */ 15497: counterseclevel = COUNTERSECURITY; /* security level for \counter{} */ 15498: environseclevel = ENVIRONSECURITY; /* security level for \environ */ 15499: ninputcmds = 0; /* reset count of \input commands */ 15500: exitstatus=0; errorstatus=ERRORSTATUS; /* reset exit/error status */ 15501: iscaching = ISCACHING; /* true if caching images */ 15502: if ( iscaching ) { /* images are being cached */ 15503: strcpy(cachepath,CACHEPATH); /* relative path to cached files */ 15504: if ( *cachepath == '%' ) { /* leading % signals cache headers */ 15505: iscachecontenttype = 1; /* signal caching mime content-type*/ 15506: strsqueeze(cachepath,1); } } /* and squeeze out leading % char */ 15507: gifSize = 0; /* signal that image not in memory */ 15508: fgred=FGRED; fggreen=FGGREEN; fgblue=FGBLUE; /* default foreground colors */ 15509: bgred=BGRED; bggreen=BGGREEN; bgblue=BGBLUE; /* default background colors */ 15510: shrinkfactor = shrinkfactors[NORMALSIZE]; /* set shrinkfactor */ 15511: for ( ipattern=1; ipattern<=51; ipattern++ ) 15512: patternnumcount0[ipattern] = patternnumcount1[ipattern] = 0; 15513: /* --- 15514: * check QUERY_STRING query for expression overriding command-line arg 15515: * ------------------------------------------------------------------- */ 15516: if ( query != NULL ) /* check query string from environ */ 15517: if ( strlen(query) >= 1 ) { /* caller gave us a query string */ 15518: strncpy(expression,query,MAXEXPRSZ); /* so use it as expression */ 15519: expression[MAXEXPRSZ] = '\000'; /* make sure it's null terminated */ 15520: if ( 0 ) /*true to remove leading whitespace*/ 15521: while ( isspace(*expression) && *expression!='\000' ) 15522: {strsqueeze(expression,1);} /* squeeze out white space */ 15523: isquery = 1; } /* and set isquery flag */ 15524: if ( !isquery ) { /* empty query string */ 15525: char *host = getenv("HTTP_HOST"), /* additional getenv("") results */ 15526: *name = getenv("SERVER_NAME"), *addr = getenv("SERVER_ADDR"); 15527: if ( host!=NULL || name!=NULL || addr!=NULL ) { /* assume http query */ 15528: isquery = 1; /* set flag to signal query */ 15529: if ( exitstatus == 0 ) exitstatus = errorstatus; /* signal error */ 15530: strcpy(expression, /* and give user an error message */ 15531: "\\red\\small\\rm\\fbox{\\begin{gather}\\LaTeX~expression~not~supplied" 15532: "\\\\i.e.,~no~?query\\_string~given~to~mimetex.cgi\\end{gather}}"); } 15533: isqempty = 1; /* signal empty query string */ 15534: } /* --- end-of-if(!isquery) --- */ 15535: /* --- 15536: * process command-line input args (if not a query) 15537: * ------------------------------------------------ */ 15538: if ( !isquery /* don't have an html query string */ 15539: || ( /*isqempty &&*/ argc>1) ) /* or have command-line args */ 15540: { 15541: char *argsignal = ARGSIGNAL, /* signals start of mimeTeX args */ 15542: stopsignal[32] = "--"; /* default Unix end-of-args signal */ 15543: int iarg=0, argnum=0, /*argv[] index for command-line args*/ 15544: exprarg = 0, /* argv[] index for expression */ 15545: infilearg = 0, /* argv[] index for infile */ 15546: nswitches = 0, /* number of -switches */ 15547: isstopsignal = 0, /* true after stopsignal found */ 15548: isstrict = 1/*iswindows*/, /* true for strict arg checking */ 15549: /*nb, windows has apache "x -3" bug*/ 15550: nargs=0, nbadargs=0, /* number of arguments, bad ones */ 15551: maxbadargs = (isstrict?0:1), /*assume query if too many bad args*/ 15552: isgoodargs = 0; /* true to accept command-line args*/ 15553: if ( argsignal != NULL ) /* if compiled with -DARGSIGNAL */ 15554: while ( argc > ++iarg ) /* check each argv[] for argsignal */ 15555: if ( !strcmp(argv[iarg],argsignal) ) /* check for exact match */ 15556: { argnum = iarg; /* got it, start parsing next arg */ 15557: break; } /* stop looking for argsignal */ 15558: while ( argc > ++argnum ) /* check for switches and values, */ 15559: { 15560: nargs++; /* count another command-line arg */ 15561: if ( strcmp(argv[argnum],stopsignal) == 0 ) /* found stopsignal */ 15562: { isstopsignal = 1; /* so set stopsignal flag */ 15563: continue; } /* and get expression after it */ 15564: if ( !isstopsignal /* haven't seen stopsignal switch */ 15565: && *argv[argnum] == '-' ) /* and have some '-' switch */ 15566: { 15567: char *field = argv[argnum] + 1; /* ptr to char(s) following - */ 15568: char flag = tolower(*field); /* single char following '-' */ 15569: int arglen = strlen(field); /* #chars following - */ 15570: argnum++; /* arg following flag/switch is usually its value */ 15571: nswitches++; /* another switch on command line */ 15572: if ( isstrict && /* if strict checking then... */ 15573: !isthischar(flag,"g") && arglen!=1 ) /*must be single-char switch*/ 15574: { nbadargs++; argnum--; } /* so ignore longer -xxx switch */ 15575: else /* process single-char -x switch */ 15576: switch ( flag ) { /* see what user wants to tell us */ 15577: /* --- ignore uninterpreted flag --- */ 15578: default: nbadargs++; argnum--; break; 15579: /* --- adjustable program parameters (not checking input) --- */ 15580: case 'b': isdumpimage++; isdumpbuffer++; argnum--; break; 15581: case 'd': isdumpimage++; argnum--; break; 15582: case 'e': isdumpimage++; gif_outfile=argv[argnum]; break; 15583: case 'f': isdumpimage++; infilearg=argnum; break; 15584: case 'g': ispbmpgm++; 15585: if ( arglen > 1 ) ptype = atoi(field+1); /* -g2 ==> ptype=2 */ 15586: if ( 1 || *argv[argnum]=='-' ) argnum--; /*next arg is -switch*/ 15587: else pbm_outfile = argv[argnum]; break; /*next arg is filename*/ 15588: case 'm': if ( argnum < argc ) msglevel = atoi(argv[argnum]); break; 15589: case 'o': istransparent = (istransparent?0:1); argnum--; break; 15590: case 'q': isqforce = 1; argnum--; break; 15591: case 's': if ( argnum < argc ) size = atoi(argv[argnum]); break; 15592: } /* --- end-of-switch(flag) --- */ 15593: } /* --- end-of-if(*argv[argnum]=='-') --- */ 15594: else /* expression if arg not a -flag */ 15595: if ( infilearg == 0 ) /* no infile arg yet */ 15596: { if ( exprarg != 0 ) nbadargs++; /* 2nd expression invalid */ 15597: exprarg = argnum; /* but take last expression */ 15598: /*infilearg = (-1);*/ } /* and set infilearg */ 15599: else nbadargs++; /* infile and expression invalid */ 15600: } /* --- end-of-while(argc>++argnum) --- */ 15601: if ( msglevel>=999 && msgfp!=NULL ) /* display command-line info */ 15602: { fprintf(msgfp,"argc=%d, progname=%s, #args=%d, #badargs=%d\n", 15603: argc,progname,nargs,nbadargs); 15604: fprintf(msgfp,"cachepath=\"%.50s\" pathprefix=\"%.50s\"\n", 15605: cachepath,pathprefix); } 15606: /* --- 15607: * decide whether command-line input overrides query_string 15608: * -------------------------------------------------------- */ 15609: if ( isdumpimage > 2 ) nbadargs++; /* duplicate/conflicting -switch */ 15610: isgoodargs = ( !isstrict /*good if not doing strict checking*/ 15611: || !isquery /* or if no query, must use args */ 15612: || (nbadargs<nargs && nbadargs<=maxbadargs) ); /* bad args imply query */ 15613: /* --- 15614: * take expression from command-line args 15615: * -------------------------------------- */ 15616: if ( isgoodargs && exprarg > 0 /* good expression on command line */ 15617: && infilearg <= 0 ) /* and not given in input file */ 15618: if ( !isquery /* no conflict if no query_string */ 15619: || nswitches > 0 ) /* explicit -switch(es) also given */ 15620: { strncpy(expression,argv[exprarg],MAXEXPRSZ); /*expr from command-line*/ 15621: expression[MAXEXPRSZ] = '\000'; /* make sure it's null terminated */ 15622: isquery = 0; } /* and not from a query_string */ 15623: /* --- 15624: * or read expression from input file 15625: * ---------------------------------- */ 15626: if ( isgoodargs && infilearg > 0 ) /* have a good -f arg */ 15627: { 15628: FILE *infile = fopen(argv[infilearg],"r"); /* open input file for read */ 15629: if ( infile != (FILE *)NULL ) /* opened input file successfully */ 15630: { char instring[MAXLINESZ+1]; /* line from file */ 15631: int exprsz = 0; /* total #bytes read from file */ 15632: isquery = 0; /* file input, not a query_string */ 15633: *expression = '\000'; /* start expresion as empty string */ 15634: while ( fgets(instring,MAXLINESZ,infile) != (char *)NULL ) /*till eof*/ 15635: if ( exprsz + strlen(instring) < MAXEXPRSZ ) { /* have room for line */ 15636: strcat(expression,instring); /* concat line to end of expression*/ 15637: exprsz += strlen(instring); } /* update expression buffer length */ 15638: fclose ( infile ); } /*close input file after reading expression*/ 15639: } /* --- end-of-if(infilearg>0) --- */ 15640: /* --- 15641: * xlate +++'s to blanks only if query 15642: * ----------------------------------- */ 15643: if ( !isquery ) isplusblank = 0; /* don't xlate +++'s to blanks */ 15644: /* --- 15645: * check if emulating query (for testing) 15646: * -------------------------------------- */ 15647: if ( isqforce ) isquery = 1; /* emulate query string processing */ 15648: /* --- 15649: * check if emitting pbm/pgm graphic 15650: * --------------------------------- */ 15651: if ( isgoodargs && ispbmpgm > 0 ) /* have a good -g arg */ 15652: if ( 1 && gif_outfile != NULL ) /* had an -e switch with file */ 15653: if ( *gif_outfile != '\000' ) /* make sure string isn't empty */ 15654: { pbm_outfile = gif_outfile; /* use -e switch file for pbm/pgm */ 15655: gif_outfile = (char *)NULL; /* reset gif output file */ 15656: /*isdumpimage--;*/ } /* and decrement -e count */ 15657: } /* --- end-of-if(!isquery) --- */ 15658: /* --- 15659: * check for <form> input 15660: * ---------------------- */ 15661: if ( isquery ) { /* must be <form method="get"> */ 15662: if ( !memcmp(expression,"formdata",8) ) /*must be <input name="formdata"> */ 15663: { char *delim=strchr(expression,'='); /* find equal following formdata */ 15664: if ( delim != (char *)NULL ) /* found unescaped equal sign */ 15665: {strsqueezep(expression,delim+1);} /* so shift name= out */ 15666: while ( (delim=strchr(expression,'+')) != NULL ) /*unescaped plus sign*/ 15667: *delim = ' '; /* is "shorthand" for blank space */ 15668: /*unescape_url(expression,1);*/ /* convert unescaped %xx's to chars */ 15669: unescape_url(expression,0); /* convert all %xx's to chars */ 15670: unescape_url(expression,0); /* repeat */ 15671: if(0) msglevel = FORMLEVEL; /* msglevel for forms */ 15672: isformdata = 1; } /* set flag to signal form data */ 15673: else /* --- query, but not <form> input --- */ 15674: unescape_url(expression,0); } /* convert _all_ %xx's to chars */ 15675: /* --- 15676: * check queries for prefixes/suffixes/embedded that might cause problems 15677: * ---------------------------------------------------------------------- */ 15678: /* --- expression whose last char is \ --- */ 15679: if ( lastchar(expression) == '\\' ) /* last char is backslash */ 15680: strcat(expression," "); /* assume "\ " lost the final space*/ 15681: /* --- 15682: * check queries for embedded prefixes signalling special processing 15683: * ----------------------------------------------------------------- */ 15684: if ( isquery ) /* only check queries */ 15685: { 15686: /* --- check for msglevel=###$ prefix --- */ 15687: if ( !memcmp(expression,"msglevel=",9) ) /* query has msglevel prefix */ 15688: { char *delim=strchr(expression,'$'); /* find $ delim following msglevel*/ 15689: if ( delim != (char *)NULL ) /* check that we found delim */ 15690: { *delim = '\000'; /* replace delim with null */ 15691: if ( seclevel <= 9 ) /* permit msglevel specification */ 15692: msglevel = atoi(expression+9); /* interpret ### in msglevel###$ */ 15693: strsqueezep(expression,delim+1); } } /* squeeze out prefix & delim */ 15694: /* --- next check for logfile=xxx$ prefix (must follow msglevel) --- */ 15695: if ( !memcmp(expression,"logfile=",8) ) /* query has logfile= prefix */ 15696: { char *delim=strchr(expression,'$'); /* find $ delim following logfile=*/ 15697: if ( delim != (char *)NULL ) /* check that we found delim */ 15698: { *delim = '\000'; /* replace delim with null */ 15699: if ( seclevel <= 3 ) /* permit logfile specification */ 15700: strcpy(logfile,expression+8); /* interpret xxx in logfile=xxx$ */ 15701: strsqueezep(expression,delim+1); } } /* squeeze out prefix & delim */ 15702: } /* --- end-of-if(isquery) --- */ 15703: /* --- 15704: * log query (e.g., for debugging) 15705: * ------------------------------- */ 15706: if ( isquery ) /* only log query_string's */ 15707: if ( msglevel >= LOGLEVEL /* check if logging */ 15708: && seclevel <= 5 ) /* and if logging permitted */ 15709: if ( logfile != NULL ) /* if a logfile is given */ 15710: if ( *logfile != '\000' ) { /*and if it's not an empty string*/ 15711: if ( (msgfp=fopen(logfile,"a")) /* open logfile for append */ 15712: != NULL ) /* ignore logging if can't open */ 15713: { 15714: /* --- default logging --- */ 15715: logger(msgfp,msglevel,expression,mimelog); /* log query */ 15716: /* --- additional debug logging (argv and environment) --- */ 15717: if ( msglevel >= 9 ) /* log environment */ 15718: { int i; /*char name[999],*value;*/ 15719: fprintf(msgfp,"Command-line arguments...\n"); 15720: if ( argc < 1 ) /* no command-line args */ 15721: fprintf(msgfp," ...argc=%d, no argv[] variables\n",argc); 15722: else 15723: for ( i=0; i<argc; i++ ) /* display all argv[]'s */ 15724: fprintf(msgfp," argv[%d] = \"%s\"\n",i,argv[i]); 15725: #ifdef DUMPENVP /* char *envp[] available for dump */ 15726: fprintf(msgfp,"Environment variables (using envp[])...\n"); 15727: if ( envp == (char **)NULL ) /* envp not provided */ 15728: fprintf(msgfp," ...envp[] environment variables not available\n"); 15729: else 15730: for ( i=0; ; i++ ) /* display all envp[]'s */ 15731: if ( envp[i] == (char *)NULL ) break; 15732: else fprintf(msgfp," envp[%d] = \"%s\"\n",i,envp[i]); 15733: #endif /* --- DUMPENVP ---*/ 15734: #ifdef DUMPENVIRON /* skip what should be redundant output */ 15735: fprintf(msgfp,"Environment variables (using environ)...\n"); 15736: if ( environ == (char **)NULL ) /* environ not provided */ 15737: fprintf(msgfp," ...extern environ variables not available\n"); 15738: else 15739: for ( i=0; ; i++ ) /*display environ[] and getenv()'s*/ 15740: if ( environ[i] == (char *)NULL ) break; 15741: else { 15742: strcpy(name,environ[i]); /* set up name for getenv() arg */ 15743: if ( (value=strchr(name,'=')) != NULL ) /* = delimits name */ 15744: { *value = '\000'; /* got it, so null-terminate name */ 15745: value = getenv(name); } /* and look up name using getenv() */ 15746: else strcpy(name,"NULL"); /* missing = delim in environ[i] */ 15747: fprintf(msgfp,"environ[%d]: \"%s\"\n\tgetenv(%s) = \"%s\"\n", 15748: i,environ[i],name,(value==NULL?"NULL":value)); 15749: } /* --- end-of-if/else --- */ 15750: #endif /* --- DUMPENVIRON ---*/ 15751: } /* --- end-of-if(msglevel>=9) --- */ 15752: /* --- close log file if no longer needed --- */ 15753: if ( msglevel < DBGLEVEL ) /* logging, but not debugging */ 15754: { fprintf(msgfp,"%s\n",dashes); /* so log separator line, */ 15755: fclose(msgfp); /* close logfile immediately, */ 15756: msgfp = NULL; } /* and reset msgfp pointer */ 15757: else 15758: isqlogging = 1; /* set query logging flag */ 15759: } /* --- end-of-if(msglevel>=LOGLEVEL) --- */ 15760: else /* couldn't open logfile */ 15761: msglevel = 0; } /* can't emit messages */ 15762: /* --- 15763: * prepend prefix to submitted expression 15764: * -------------------------------------- */ 15765: if ( 1 || isquery ) /* queries or command-line */ 15766: if ( *exprprefix != '\000' ) /* we have a prefix string */ 15767: { int npref = strlen(exprprefix); /* #chars in prefix */ 15768: memmove(expression+npref+1,expression,strlen(expression)+1);/*make room*/ 15769: memcpy(expression,exprprefix,npref); /* copy prefix into expression */ 15770: expression[npref] = '{'; /* followed by { */ 15771: strcat(expression,"}"); } /* and terminating } to balance { */ 15772: /* --- 15773: * check if http_referer is allowed to use this image and to use \input{} 15774: * ---------------------------------------------------------------------- */ 15775: if ( isquery ) { /* not relevant if "interactive" */ 15776: /* --- check -DREFERER=\"comma,separated,list\" of valid referers --- */ 15777: if ( referer != NULL ) { /* compiled with -DREFERER=\"...\" */ 15778: if ( strcmp(referer,"month") != 0 ) /* but it's *only* "month" signal */ 15779: if ( ishttpreferer ) /* or called "standalone" */ 15780: if ( !isstrstr(http_referer,referer,0) ) { /* invalid http_referer */ 15781: expression = invalid_referer_msg; /* so give user error message */ 15782: isinvalidreferer = 1; } } /* and signal invalid referer */ 15783: else /* compiled without -DREFERER= */ 15784: if ( reflevels > 0 ) { /*match referer unless -DREFLEVELS=0*/ 15785: /* --- check topmost levels of http_referer against http_host --- */ 15786: if ( ishttpreferer /* have http_referer */ 15787: && !isempty(referer_match) ) /* and something to match it with */ 15788: if ( !urlncmp(http_referer,referer_match,reflevels) ) { /*match failed*/ 15789: strcpy(exprbuffer,invalid_referer_match); /* init error message */ 15790: strreplace(exprbuffer,"SERVER_NAME", /* and then replace SERVER_NAME */ 15791: strdetex(urlprune(referer_match,reflevels),1),0);/*with referer_match*/ 15792: isinvalidreferer = 1; } /* and signal invalid referer */ 15793: } /* --- end-of-if(reflevels>0) --- */ 15794: /* --- check -DINPUTREFERER=\"comma,separated,list\" of \input users --- */ 15795: inputseclevel = INPUTSECURITY; /* set default input security */ 15796: if ( inputreferer != NULL ) { /* compiled with -DINPUTREFERER= */ 15797: if ( http_referer == NULL ) /* but no http_referer given */ 15798: inputseclevel = (-1); /* unknown user can't \input{} */ 15799: else /*have inputreferer and http_referer*/ 15800: if ( !isstrstr(http_referer,inputreferer,0) ) /*http_referer can't \input*/ 15801: inputseclevel = (-1); /* this known user can't \input{} */ 15802: } /* --- end-of-if(inputreferer!=NULL) --- */ 15803: } /* --- end-of-if(isquery) --- */ 15804: /* --- 15805: * check if referer contains "month" signal 15806: * ---------------------------------------- */ 15807: if ( isquery ) /* not relevant if "interactive" */ 15808: if ( referer != NULL ) /* nor if compiled w/o -DREFERER= */ 15809: if ( !isinvalidreferer ) /* nor if already invalid referer */ 15810: if ( strstr(referer,"month") != NULL ) /* month check requested */ 15811: if ( !ismonth(progname) ) /* not executed as mimetexJan-Dec */ 15812: { expression = invalid_referer_msg; /* so give user error message */ 15813: isinvalidreferer = 1; } /* and signal invalid referer */ 15814: /* --- 15815: * check if http_referer is to be denied access 15816: * -------------------------------------------- */ 15817: if ( isquery ) /* not relevant if "interactive" */ 15818: if ( !isinvalidreferer ) /* nor if already invalid referer */ 15819: { int iref=0, msgnum=(-999); /* denyreferer index, message# */ 15820: for ( iref=0; msgnum<0; iref++ ) { /* run through denyreferer[] table */ 15821: char *deny = denyreferer[iref].referer; /* referer to be denied */ 15822: if ( deny == NULL ) break; /* null signals end-of-table */ 15823: if ( msglevel>=999 && msgfp!=NULL ) /* debugging */ 15824: {fprintf(msgfp,"main> invalid iref=%d: deny=%s http_referer=%s\n", 15825: iref,deny,(http_referer==NULL?"null":http_referer)); fflush(msgfp);} 15826: if ( *deny == '\000' ) /* signal to check for no referer */ 15827: { if ( http_referer == NULL ) /* http_referer not supplied */ 15828: msgnum = denyreferer[iref].msgnum; } /* so set message# */ 15829: else /* have referer to check for */ 15830: if ( http_referer != NULL ) /* and have referer to be checked */ 15831: if ( isstrstr(http_referer,deny,0) ) /* invalid http_referer */ 15832: msgnum = denyreferer[iref].msgnum; /* so set message# */ 15833: } /* --- end-of-for(iref) --- */ 15834: if ( msgnum >= 0 ) /* deny access to this referer */ 15835: { if ( msgnum > maxmsgnum ) msgnum = 0; /* keep index within bounds */ 15836: expression = msgtable[msgnum]; /* set user error message */ 15837: isinvalidreferer = 1; } /* and signal invalid referer */ 15838: } /* --- end-of-if(!isinvalidreferer) --- */ 15839: /* --- also check maximum query_string length if no http_referer given --- */ 15840: if ( isquery ) /* not relevant if "interactive" */ 15841: if ( !isinvalidreferer ) /* nor if already invalid referer */ 15842: if ( !ishttpreferer ) /* no http_referer supplied */ 15843: if ( strlen(expression) > norefmaxlen ) { /* query_string too long */ 15844: if ( isempty(referer_match) ) /* no referer_match to display */ 15845: expression = invalid_referer_msg; /* set invalid http_referer message*/ 15846: else { /* error with referer_match display*/ 15847: strcpy(exprbuffer,invalid_referer_match); /* init error message */ 15848: strreplace(exprbuffer,"SERVER_NAME", /* and then replace SERVER_NAME */ 15849: strdetex(urlprune(referer_match,reflevels),1),0); } /*with host_http*/ 15850: isinvalidreferer = 1; } /* and signal invalid referer */ 15851: /* --- 15852: * check for "advertisement" 15853: * ------------------------- */ 15854: /* --- check if advertisement messages only for one particular host --- */ 15855: if ( !isempty(host_showad) ) /* messages only for this referer */ 15856: if ( !isempty(referer_match) ) /* have HTTP_HOST or SERVER_NAME */ 15857: if ( strstr(referer_match,host_showad) /* see if this host sees ad */ 15858: == NULL ) /* not mimetex host for ad */ 15859: adfrequency = 0; /* turn off advertisements */ 15860: /* --- check for advertisement directive (\advertisement) --- */ 15861: if ( strreplace(expression,"\\advertisement","",0) /*remove \advertisement*/ 15862: >= 1 ) adfrequency = 1; /* force advertisement display */ 15863: if ( adfrequency > 0 ) { /* advertising enabled */ 15864: int npump = crc16(expression)%16; /* #times, 0-15, to pump rand() */ 15865: srand(atoi(timestamp(TZDELTA,4))); /* init rand() with mmddhhmmss */ 15866: while ( npump-- >= 0 ) rand(); /* pre-pump rand() before use */ 15867: if ( (1+rand())%adfrequency == 0 ) { /* once every adfrequency calls */ 15868: advertisement(expression,adtemplate); } } /*wrap expression in advert*/ 15869: /* --- 15870: * check for image caching (and whether or not caching content type) 15871: * ----------------------------------------------------------------- */ 15872: if ( strstr(expression,"\\counter") != NULL /* can't cache \counter{} */ 15873: || strstr(expression,"\\input") != NULL /* can't cache \input{} */ 15874: || strstr(expression,"\\today") != NULL /* can't cache \today */ 15875: || strstr(expression,"\\calendar") != NULL /* can't cache \calendar */ 15876: || strstr(expression,"\\nocach") != NULL /* no caching requested */ 15877: || isformdata /* don't cache user form input */ 15878: ) { iscaching = 0; /* so turn caching off */ 15879: maxage = 5; } /* and set max-age to 5 seconds */ 15880: if ( strstr(expression,"\\depth") != NULL ) /* cache content-type lines */ 15881: iscachecontenttype = 1; /* set flag to cache content-type */ 15882: if ( strstr(expression,"\\nodepth") != NULL ) /* don't cache content-type */ 15883: iscachecontenttype = 0; /*set flag to not cache content-type*/ 15884: if ( isquery ) /* don't cache command-line images */ 15885: if ( iscaching ) /* image caching enabled */ 15886: { 15887: /* --- set up path to cached image file --- */ 15888: char *md5hash = md5str(expression); /* md5 hash of expression */ 15889: if ( md5hash == NULL ) /* failed for some reason */ 15890: iscaching = 0; /* so turn off caching */ 15891: else 15892: { 15893: strcpy(cachefile,cachepath); /* start with (relative) path */ 15894: strcat(cachefile,md5hash); /* add md5 hash of expression */ 15895: strcat(cachefile,".gif"); /* finish with .gif extension */ 15896: gif_outfile = cachefile; /* signal GIF_Create() to cache */ 15897: /* --- emit mime content-type line --- */ 15898: if ( 0 && isemitcontenttype ) /* now done in emitcache() */ 15899: { fprintf( stdout, "Cache-Control: max-age=%d\n",maxage ); 15900: if ( abs(valign) < 999 ) /* have vertical align */ 15901: fprintf( stdout, "Vertical-Align: %d\n",valign ); 15902: fprintf( stdout, "Content-type: image/gif\n\n" ); } 15903: /* --- emit cached image if it already exists --- */ 15904: if ( emitcache(cachefile,maxage,valign,0) > 0 ) /* cached image emitted */ 15905: goto end_of_job; /* so nothing else to do */ 15906: /* --- log caching request --- */ 15907: if ( msglevel >= 1 /* check if logging */ 15908: /*&& seclevel <= 5*/ ) /* and if logging permitted */ 15909: if ( cachelog != NULL ) /* if a logfile is given */ 15910: if ( *cachelog != '\000' ) /*and if it's not an empty string*/ 15911: { char filename[256]; /* construct cachepath/cachelog */ 15912: FILE *filefp=NULL; /* fopen(filename) */ 15913: strcpy(filename,cachepath); /* start with (relative) path */ 15914: strcat(filename,cachelog); /* add cache log filename */ 15915: if ( (filefp=fopen(filename,"a")) /* open cache logfile for append */ 15916: != NULL ) /* ignore logging if can't open */ 15917: { int isreflogged = 0; /* set true if http_referer logged */ 15918: fprintf(filefp,"%s %s\n", /* timestamp, md5 file */ 15919: timestamp(TZDELTA,0),cachefile+strlen(cachepath)); /*skip path*/ 15920: fprintf(filefp,"%s\n",expression); /* expression in filename */ 15921: if ( http_referer != NULL ) /* show referer if we have one */ 15922: if ( *http_referer != '\000' ) /* and if not an empty string*/ 15923: { int loglen = strlen(dashes); /* #chars on line in log file*/ 15924: char *refp = http_referer; /* line to be printed */ 15925: isreflogged = 1; /* signal http_referer logged*/ 15926: while ( 1 ) { /* printed in parts if needed*/ 15927: fprintf(filefp,"%.*s\n",loglen,refp); /* print a part */ 15928: if ( strlen(refp) <= loglen ) break; /* no more parts */ 15929: refp += loglen; } } /* bump ptr to next part */ 15930: if ( !isreflogged ) /* http_referer not logged */ 15931: fprintf(filefp,"http://none\n"); /* so log dummy referer line */ 15932: fprintf(filefp,"%s\n",dashes); /* separator line */ 15933: fclose(filefp); } /* close logfile immediately */ 15934: } /* --- end-of-if(cachelog!=NULL) --- */ 15935: } /* --- end-of-if/else(md5hash==NULL) --- */ 15936: } /* --- end-of-if(iscaching) --- */ 15937: /* --- 15938: * emit copyright, gnu/gpl notice (if "interactive") 15939: * ------------------------------------------------- */ 15940: if ( !isdumpimage ) /* don't mix ascii with image dump */ 15941: if ( (!isquery||isqlogging) && msgfp!=NULL ) { /* called from command line */ 15942: fprintf(msgfp,"%s\n%s\n",copyright1,copyright2); /* display copyright */ 15943: fprintf(msgfp,"Most recent revision: %s\n",REVISIONDATE); /*revision date*/ 15944: } /* --- end-of-if(!isquery...) --- */ 15945: /* ------------------------------------------------------------------------- 15946: rasterize expression and put a border around it 15947: -------------------------------------------------------------------------- */ 15948: /* --- preprocess expression, converting LaTeX constructs for mimeTeX --- */ 15949: if ( expression != NULL ) { /* have expression to rasterize */ 15950: expression = mimeprep(expression); } /* preprocess expression */ 15951: /* --- double-check that we actually have an expression to rasterize --- */ 15952: if ( expression == NULL ) { /* nothing to rasterize */ 15953: if ( exitstatus == 0 ) exitstatus = errorstatus; /*signal error to parent*/ 15954: if ( (!isquery||isqlogging) && msgfp!=NULL ) { /*emit error if not query*/ 15955: if ( exitstatus != 0 ) fprintf(msgfp,"Exit code = %d,\n",exitstatus); 15956: fprintf(msgfp,"No LaTeX expression to rasterize\n"); } 15957: goto end_of_job; } /* and then quit */ 15958: /* --- rasterize expression --- */ 15959: if ( (sp = rasterize(expression,size)) == NULL ) { /* failed to rasterize */ 15960: if ( exitstatus == 0 ) exitstatus = errorstatus; /*signal error to parent*/ 15961: if ( (!isquery||isqlogging) && msgfp!=NULL ) { /*emit error if not query*/ 15962: if ( exitstatus != 0 ) fprintf(msgfp,"Exit code = %d,\n",exitstatus); 15963: fprintf(msgfp,"Failed to rasterize %.2048s\n",expression); } 15964: if ( isquery ) { /* try to display failed expression*/ 15965: char errormsg[4096]; /* buffer for failed expression */ 15966: strcpy(errormsg, /* init error message */ 15967: "\\red\\fbox{\\begin{gather}" 15968: "{\\rm~mi\\underline{meTeX~failed~to~render~your~expressi}on}\\\\[5]"); 15969: strcat(errormsg,"{\\rm\\hspace{10}{"); /*render expression as \rm*/ 15970: strcat(errormsg,strdetex(expression,0));/*add detexed expression to msg*/ 15971: strcat(errormsg,"}\\hspace{10}}\\end{gather}}"); /* finish up */ 15972: if ( (sp = rasterize(errormsg,1)) == NULL ) /*couldn't rasterize errmsg*/ 15973: sp = rasterize( /* so rasterize generic error */ 15974: "\\red\\rm~\\fbox{mimeTeX~failed~to~render\\\\your~expression}",1); } 15975: if ( sp == NULL ) goto end_of_job; /* re-check for err message failure*/ 15976: magstep = 1; /* don't magstep error msgs */ 15977: } /* --- end-of-if((sp=rasterize())==NULL) --- */ 15978: /* --- magnify entire image here if we need >>bit<<map for pbm output --- */ 15979: if ( !isaa || (ispbmpgm && ptype<2) ) { /*or use bytemapmag() below instead*/ 15980: if ( magstep > 1 && magstep <= 10 ) { /* magnify entire bitmap image */ 15981: raster *rastmag(), *magrp=NULL; /* bitmap magnify function */ 15982: int baseline = sp->baseline; /* original image baseline */ 15983: magrp = rastmag(sp->image,magstep); /* magnify raster image */ 15984: if ( magrp != NULL ) { /* succeeded to magnify image */ 15985: delete_raster(sp->image); /* free original raster image */ 15986: sp->image = magrp; /*and replace it with magnified one*/ 15987: /* --- adjust parameters --- */ 15988: baseline *= magstep; /* scale baseline */ 15989: if ( baseline > 0 ) baseline += 1; /* adjust for no descenders */ 15990: sp->baseline = baseline; } /*reset baseline of magnified image*/ 15991: magstep = (-1); /*done, don't also use bytemapmag()*/ 15992: } /* --- end-of-if(magstep) --- */ 15993: } /* --- end-of-if(1||(ispbmpgm&&ptype<2)) --- */ 15994: /* ---no border requested, but this adjusts width to multiple of 8 bits--- */ 15995: if ( issupersampling ) /* no border needed for gifs */ 15996: bp = sp->image; /* so just extract pixel map */ 15997: else /* for mime xbitmaps must have... */ 15998: bp = border_raster(sp->image,0,0,0,1); /* image width multiple of 8 bits */ 15999: sp->image = bitmap_raster = bp; /* global copy for gif,png output */ 16000: raster_width = bp->width; raster_height = bp->height; /* global copy */ 16001: raster_baseline = sp->baseline; /* global copy (not needed) */ 16002: if ( sp!=NULL && bp!=NULL ) { /* have raster */ 16003: valign= raster_baseline -(raster_height -1);/*#pixels for Vertical-Align:*/ 16004: if ( abs(valign) > 255 ) valign = (-9999); } /* sanity check */ 16005: if ( ispbmpgm && ptype<2 ) /* -g switch or -g1 switch */ 16006: type_pbmpgm(bp,ptype,pbm_outfile); /* emit b/w pbm file */ 16007: /* ------------------------------------------------------------------------- 16008: generate anti-aliased bytemap from (bordered) bitmap 16009: -------------------------------------------------------------------------- */ 16010: if ( isaa ) /* we want anti-aliased bitmap */ 16011: { 16012: /* --- 16013: * allocate bytemap and colormap as per width*height of bitmap 16014: * ----------------------------------------------------------- */ 16015: int nbytes = (raster_width)*(raster_height); /*#bytes for byte,colormap*/ 16016: if ( isss ) /* anti-aliasing by supersampling */ 16017: bytemap_raster = (intbyte *)(bitmap_raster->pixmap); /*bytemap in raster*/ 16018: else /* need to allocate bytemap */ 16019: if ( aaalgorithm == 0 ) /* anti-aliasing not wanted */ 16020: isaa = 0; /* so signal no anti-aliasing */ 16021: else /* anti-aliasing wanted */ 16022: if ( (bytemap_raster = (intbyte *)malloc(nbytes)) /* malloc bytemap */ 16023: == NULL ) isaa = 0; /* reset flag if malloc failed */ 16024: /* --- 16025: * now generate anti-aliased bytemap and colormap from bitmap 16026: * ---------------------------------------------------------- */ 16027: if ( isaa ) /*re-check that we're anti-aliasing*/ 16028: { 16029: /* --- 16030: * select anti-aliasing algorithm 16031: * ------------------------------ */ 16032: if ( !isss ) /* generate bytemap for lowpass */ 16033: switch ( aaalgorithm ) { /* choose antialiasing algorithm */ 16034: default: isaa = 0; break; /* unrecognized algorithm */ 16035: case 1: /* 1 for aalowpass() */ 16036: if ( aalowpass(bp,bytemap_raster,grayscale) /*my own lowpass filter*/ 16037: == 0 ) isaa = 0; /*failed, so turn off anti-aliasing*/ 16038: break; 16039: case 2: /*2 for netpbm pnmalias.c algorithm*/ 16040: if ( aapnm(bp,bytemap_raster,grayscale) /* pnmalias.c filter */ 16041: == 0 ) isaa = 0; /*failed, so turn off anti-aliasing*/ 16042: break; 16043: case 3: /*3 for aapnm() based on aagridnum()*/ 16044: if ( aapnmlookup(bp,bytemap_raster,grayscale) /* pnmalias.c filter */ 16045: == 0 ) isaa = 0; /*failed, so turn off anti-aliasing*/ 16046: break; 16047: case 4: /* 4 for aalookup() table lookup */ 16048: if ( aalowpasslookup(bp,bytemap_raster,grayscale) /* aalookup() */ 16049: == 0 ) isaa = 0; /*failed, so turn off anti-aliasing*/ 16050: break; 16051: } /* --- end-of-switch(aaalgorithm) --- */ 16052: /* --- 16053: * emit aalookup() pattern# counts/percents diagnostics 16054: * ---------------------------------------------------- */ 16055: if ( !isquery && msgfp!=NULL && msglevel>=99 ) { /*emit patternnumcounts*/ 16056: int pcount0=0, pcount1=0; /* init total w,b center counts */ 16057: for ( ipattern=1; ipattern<=51; ipattern++ ) { /*each possible pattern*/ 16058: if ( ipattern > 1 ) /* ignore all-white squares */ 16059: pcount0 += patternnumcount0[ipattern]; /* bump total white centers */ 16060: pcount1 += patternnumcount1[ipattern]; } /* bump total black centers */ 16061: if ( pcount0+pcount1 > 0 ) /* have pcounts (using aalookup) */ 16062: fprintf(msgfp, " aalookup() patterns excluding#1 white" 16063: " (%%'s are in tenths of a percent)...\n"); 16064: for ( ipattern=1; ipattern<=51; ipattern++ ) { /*each possible pattern*/ 16065: int tot = patternnumcount0[ipattern] + patternnumcount1[ipattern]; 16066: if ( tot > 0 ) /* this pattern occurs in image */ 16067: fprintf(msgfp, 16068: " pattern#%2d: %7d(%6.2f%%) +%7d(%6.2f%%) =%7d(%6.2f%%)\n", 16069: ipattern, patternnumcount0[ipattern], (ipattern<=1? 999.99: 16070: 1000.*((double)patternnumcount0[ipattern])/((double)pcount0)), 16071: patternnumcount1[ipattern], 16072: 1000.*((double)patternnumcount1[ipattern])/((double)pcount1), 16073: tot, (ipattern<=1? 999.99: 16074: 1000.*((double)tot)/((double)(pcount0+pcount1))) ); } 16075: if ( pcount0+pcount1 > 0 ) /* true when using aalookup() */ 16076: fprintf(msgfp, 16077: "all patterns: %7d +%7d =%7d total pixels\n", 16078: pcount0,pcount1,pcount0+pcount1); } 16079: /* --- 16080: * apply magstep if requested and not already done to bitmap above 16081: * --------------------------------------------------------------- */ 16082: if ( 1 ) { /* or use rastmag() above instead */ 16083: if ( magstep > 1 && magstep <= 10 ) { /*magnify entire bytemap image*/ 16084: intbyte *bytemapmag(), *magmap=NULL; /* bytemap magnify function */ 16085: magmap=bytemapmag(bytemap_raster,raster_width,raster_height,magstep); 16086: if ( magmap != NULL ) { /* succeeded to magnify image */ 16087: free(bytemap_raster); /* free original bytemap image */ 16088: bytemap_raster = magmap; /*and replace it with magnified one*/ 16089: /* --- adjust parameters --- */ 16090: raster_width *= magstep; raster_height *= magstep; /*scale raster*/ 16091: nbytes *= (magstep*magstep); /* scale total image size */ 16092: if ( abs(valign) < 255 ) { /* valign okay */ 16093: valign *= magstep; /* scale by magstep */ 16094: if ( abs(valign) > 512 ) valign = (-9999); } /* sanity check */ 16095: } /* --- end-of-if(magmap!=NULL) --- */ 16096: magstep = (-1); /*done, don't also use bytemapmag()*/ 16097: } /* --- end-of-if(magstep) --- */ 16098: } /* --- end-of-if(1) --- */ 16099: /* --- 16100: * finally, generate colors and colormap 16101: * ------------------------------------- */ 16102: if ( isaa ) /* have bytemap, so... */ 16103: if ( (colormap_raster = (intbyte *)malloc(nbytes)) /*malloc colormap*/ 16104: == NULL ) isaa = 0; /* reset flag if malloc failed */ 16105: if ( isaa ) { /* we have byte/colormap_raster */ 16106: ncolors = aacolormap(bytemap_raster,nbytes,colors,colormap_raster); 16107: if ( ncolors < 2 ) /* failed */ 16108: { isaa = 0; /* so turn off anti-aliasing */ 16109: ncolors = 2; } /* and reset for black&white */ 16110: } /* --- end-of-if(isaa) --- */ 16111: if ( isaa && ispbmpgm && ptype>1 ) { /* -g2 switch */ 16112: raster pbm_raster; /*construct arg for write_pbmpgm()*/ 16113: pbm_raster.width = raster_width; pbm_raster.height = raster_height; 16114: pbm_raster.pixsz = 8; pbm_raster.pixmap = (pixbyte *)bytemap_raster; 16115: type_pbmpgm(&pbm_raster,ptype,pbm_outfile); } /*write grayscale file*/ 16116: } /* --- end-of-if(isaa) --- */ 16117: } /* --- end-of-if(isaa) --- */ 16118: /* ------------------------------------------------------------------------- 16119: display results on msgfp if called from command line (usually for testing) 16120: -------------------------------------------------------------------------- */ 16121: if ( (!isquery||isqlogging) || msglevel >= 99 ) /*command line or debuging*/ 16122: if ( !isdumpimage ) /* don't mix ascii with image dump */ 16123: { 16124: /* --- 16125: * display ascii image of rasterize()'s rasterized bitmap 16126: * ------------------------------------------------------ */ 16127: if ( !isss ) /* no bitmap for supersampling */ 16128: { fprintf(msgfp,"\nAscii dump of bitmap image...\n"); 16129: type_raster(bp,msgfp); } /* emit ascii image of raster */ 16130: /* --- 16131: * display anti-aliasing results applied to rasterized bitmap 16132: * ---------------------------------------------------------- */ 16133: if ( isaa ) /* if anti-aliasing applied */ 16134: { 16135: int igray; /* colors[] index */ 16136: /* --- anti-aliased bytemap image --- */ 16137: if ( msgfp!=NULL && msglevel>=9 ) /* don't usually emit raw bytemap */ 16138: { fprintf(msgfp,"\nHex dump of anti-aliased bytemap, " /*emit bytemap*/ 16139: "asterisks denote \"black\" bytes (value=%d)...\n",grayscale-1); 16140: type_bytemap(bytemap_raster,grayscale, 16141: raster_width,raster_height,msgfp); } 16142: /* --- colormap image --- */ 16143: fprintf(msgfp,"\nHex dump of colormap indexes, " /* emit colormap */ 16144: "asterisks denote \"black\" bytes (index=%d)...\n",ncolors-1); 16145: type_bytemap(colormap_raster,ncolors, 16146: raster_width,raster_height,msgfp); 16147: /* --- rgb values corresponding to colormap indexes */ 16148: fprintf(msgfp,"\nThe %d colormap indexes denote rgb values...",ncolors); 16149: for ( igray=0; igray<ncolors; igray++ ) /* show colors[] values */ 16150: fprintf(msgfp,"%s%2x-->%3d", (igray%5?" ":"\n"), 16151: igray,(int)(colors[ncolors-1]-colors[igray])); 16152: fprintf(msgfp,"\n"); /* always needs a final newline */ 16153: } /* --- end-of-if(isaa) --- */ 16154: } /* --- end-of-if(!isquery||msglevel>=9) --- */ 16155: /* ------------------------------------------------------------------------- 16156: emit xbitmap or gif image, and exit 16157: -------------------------------------------------------------------------- */ 16158: if ( isquery /* called from browser (usual) */ 16159: || (isdumpimage && !ispbmpgm) /* or to emit gif dump of image */ 16160: || msglevel >= 99 ) /* or for debugging */ 16161: { 16162: int igray = 0; /* grayscale index */ 16163: #if defined(GIF) /* compiled to emit gif */ 16164: /* ------------------------------------------------------------------------ 16165: emit GIF image 16166: ------------------------------------------------------------------------- */ 16167: /* --- don't use memory buffer if outout file given --- */ 16168: if ( gif_outfile != NULL ) isinmemory = 0; /* reset memory buffer flag */ 16169: /* --- construct contenttype[] buffer containing mime headers --- */ 16170: if ( 1 ) { /* always construct buffer */ 16171: sprintf( contenttype, "Cache-Control: max-age=%d\n", maxage ); 16172: /*sprintf(contenttype+strlen(contenttype), 16173: "Expires: Fri, 31 Oct 2003 23:59:59 GMT\n" );*/ 16174: /*sprintf(contenttype+strlen(contenttype), 16175: "Last-Modified: Wed, 15 Oct 2003 01:01:01 GMT\n");*/ 16176: if ( abs(valign) < 999 ) /* have Vertical-Align: header info*/ 16177: sprintf( contenttype+strlen(contenttype), 16178: "Vertical-Align: %d\n", valign ); 16179: sprintf( contenttype+strlen(contenttype), 16180: "Content-type: image/gif\n\n" ); } 16181: /* --- emit mime content-type line --- */ 16182: if ( isemitcontenttype /* content-type lines wanted */ 16183: && !isdumpimage /* don't mix ascii with image dump */ 16184: && !isinmemory /* done below if in memory */ 16185: && !iscaching ) /* done by emitcache() if caching */ 16186: { fputs(contenttype,stdout); } /* emit content-type: header buffer*/ 16187: /* --- write output to memory buffer, possibly for testing --- */ 16188: if ( isinmemory /* want gif written to memory */ 16189: || isdumpbuffer ) /*or dump memory buffer for testing*/ 16190: if ( gif_outfile == NULL ) /* and don't already have a file */ 16191: { *gif_buffer = '\000'; /* init buffer as empty string */ 16192: memset(gif_buffer,0,MAXGIFSZ); /* zero out buffer */ 16193: gif_outfile = gif_buffer; /* and point outfile to buffer */ 16194: if ( isdumpbuffer ) /* buffer dump test requested */ 16195: isdumpbuffer = 999; } /* so signal dumping to buffer */ 16196: /* --- initialize gifsave library and colors --- */ 16197: if ( msgfp!=NULL && msglevel>=999 ) 16198: { fprintf(msgfp,"main> calling GIF_Create(*,%d,%d,%d,8)\n", 16199: raster_width,raster_height,ncolors); fflush(msgfp); } 16200: while ( 1 ) /* init gifsave lib, and retry if caching fails */ 16201: { int status = GIF_Create(gif_outfile, 16202: raster_width,raster_height, ncolors, 8); 16203: if ( status == 0 ) break; /* continue if succeeded */ 16204: if ( iscaching == 0 ) goto end_of_job; /* quit if failed */ 16205: iscaching = 0; /* retry without cache file */ 16206: isdumpbuffer = 0; /* reset isdumpbuffer signal */ 16207: if ( isquery ) isinmemory = 1; /* force in-memory image generation*/ 16208: if ( isinmemory ) { /* using memory buffer */ 16209: gif_outfile = gif_buffer; /* emit images to memory buffer */ 16210: *gif_outfile = '\000'; } /* empty string signals buffer */ 16211: else { /* or */ 16212: gif_outfile = (char *)NULL; /* emit images to stdout */ 16213: if ( isemitcontenttype ) { /* content-type lines wanted */ 16214: fprintf( stdout, "Cache-Control: max-age=%d\n",maxage ); 16215: fprintf( stdout, "Content-type: image/gif\n\n" ); } } 16216: } /* --- end-of-while(1) --- */ 16217: GIF_SetColor(0,bgred,bggreen,bgblue); /* background white if all 255 */ 16218: if ( !isaa ) /* just b&w if not anti-aliased */ 16219: { GIF_SetColor(1,fgred,fggreen,fgblue); /* foreground black if all 0 */ 16220: colors[0]='\000'; colors[1]='\001'; } /* and set 2 b&w color indexes */ 16221: else /* set grayscales for anti-aliasing */ 16222: /* --- anti-aliased, so call GIF_SetColor() for each colors[] --- */ 16223: for ( igray=1; igray<ncolors; igray++ ) /* for colors[] values */ 16224: { 16225: /*--- gfrac goes from 0 to 1.0, as igray goes from 0 to ncolors-1 ---*/ 16226: double gfrac = ((double)colors[igray])/((double)colors[ncolors-1]); 16227: /* --- r,g,b components go from background to foreground color --- */ 16228: int red = iround(((double)bgred) +gfrac*((double)(fgred-bgred))), 16229: green= iround(((double)bggreen)+gfrac*((double)(fggreen-bggreen))), 16230: blue = iround(((double)bgblue) +gfrac*((double)(fgblue-bgblue))); 16231: /* --- set color index number igray to rgb values gray,gray,gray --- */ 16232: GIF_SetColor(igray, red,green,blue); /*set gray,grayer,...,0=black*/ 16233: } /* --- end-of-for(igray) --- */ 16234: /* --- set gif color#0 (background) transparent --- */ 16235: if ( istransparent ) /* transparent background wanted */ 16236: GIF_SetTransparent(0); /* set transparent background */ 16237: if (msgfp!=NULL && msglevel>=9) fflush(msgfp); /*flush debugging output*/ 16238: /* --- emit compressed gif image (to stdout or cache file) --- */ 16239: GIF_CompressImage(0, 0, -1, -1, GetPixel); /* emit gif */ 16240: GIF_Close(); /* close file */ 16241: if ( msgfp!=NULL && msglevel>=9 ) 16242: { fprintf(msgfp,"main> created gifSize=%d\n", gifSize); 16243: fflush(msgfp); } 16244: /* --- may need to emit image from cached file or from memory --- */ 16245: if ( isquery /* have an actual query string */ 16246: || isdumpimage /* or dumping image */ 16247: || msglevel >= 99 ) { /* or debugging */ 16248: int maxage2 = (isdumpimage?(-1):maxage); /* no headers if dumping image */ 16249: if ( iscaching ) /* caching enabled */ 16250: emitcache(cachefile,maxage2,valign,0); /*emit cached image (hopefully)*/ 16251: else if ( isinmemory ) /* or emit image from memory buffer*/ 16252: emitcache(gif_buffer,maxage2,valign,1); } /*emitted from memory buffer*/ 16253: /* --- for testing, may need to write image buffer to file --- */ 16254: if ( isdumpbuffer > 99 ) /* gif image in memory buffer */ 16255: if ( gifSize > 0 ) /* and it's not an empty buffer */ 16256: { FILE *dumpfp = fopen("mimetex.gif","wb"); /* dump to mimetex.gif */ 16257: if ( dumpfp != NULL ) /* file opened successfully */ 16258: { fwrite(gif_buffer,sizeof(unsigned char),gifSize,dumpfp); /*write*/ 16259: fclose(dumpfp); } /* and close file */ 16260: } /* --- end-of-if(isdumpbuffer>99) --- */ 16261: #else 16262: /* ------------------------------------------------------------------------ 16263: emit mime XBITMAP image 16264: ------------------------------------------------------------------------- */ 16265: xbitmap_raster(bp,stdout); /* default emits mime xbitmap */ 16266: #endif 16267: } /* --- end-of-if(isquery) --- */ 16268: /* --- exit --- */ 16269: end_of_job: 16270: if ( !isss ) /*bytemap raster in sp for supersamp*/ 16271: if ( bytemap_raster != NULL ) free(bytemap_raster);/*free bytemap_raster*/ 16272: if (colormap_raster != NULL )free(colormap_raster); /*and colormap_raster*/ 16273: if ( 0 && gif_buffer != NULL ) free(gif_buffer); /* free malloced buffer */ 16274: if ( 1 && sp != NULL ) delete_subraster(sp); /* and free expression */ 16275: if ( msgfp != NULL /* have message/log file open */ 16276: && msgfp != stdout ) /* and it's not stdout */ 16277: { fprintf(msgfp,"mimeTeX> successful end-of-job at %s\n", 16278: timestamp(TZDELTA,0)); 16279: fprintf(msgfp,"%s\n",dashes); /* so log separator line */ 16280: fclose(msgfp); } /* and close logfile */ 16281: /* --- dump memory leaks in debug window if in MS VC++ debug mode --- */ 16282: #if defined(_CRTDBG_MAP_ALLOC) 16283: _CrtDumpMemoryLeaks(); 16284: #endif 16285: /* --- exit() if not running as Windows DLL (see CreateGifFromEq()) --- */ 16286: #if !defined(_USRDLL) 16287: if ( errorstatus == 0 ) /*user doesn't want errors signalled*/ 16288: exitstatus = 0; /* so reset error status */ 16289: exit ( exitstatus ); 16290: #endif 16291: } /* --- end-of-function main() --- */ 16292: 16293: /* ========================================================================== 16294: * Function: CreateGifFromEq ( expression, gifFileName ) 16295: * Purpose: shortcut method to create GIF file for expression, 16296: * with antialising and all other capabilities 16297: * -------------------------------------------------------------------------- 16298: * Arguments: expression (I) char *ptr to null-terminated string 16299: * containing LaTeX expression to be rendred 16300: * gifFileName (I) char *ptr to null-terminated string 16301: * containing name of output gif file 16302: * -------------------------------------------------------------------------- 16303: * Returns: ( int ) exit value from main (0 if successful) 16304: * -------------------------------------------------------------------------- 16305: * Notes: o This function is the entry point when mimeTeX is built 16306: * as a Win32 DLL rather then a standalone app or CGI 16307: * o Contributed to mimeTeX by Shital Shah. See his homepage 16308: * http://www.shitalshah.com 16309: * o Shital discusses the mimeTeX Win32 DLL project at 16310: * http://www.codeproject.com/dotnet/Eq2Img.asp 16311: * and you can download his latest code from 16312: * http://www.shitalshah.com/dev/eq2img_all.zip 16313: * ======================================================================= */ 16314: /* --- include function to expose Win32 DLL to outside world --- */ 16315: #if defined(_USRDLL) 16316: extern _declspec(dllexport)int _cdecl 16317: CreateGifFromEq ( char *expression, char *gifFileName ); 16318: #endif 16319: /* --- entry point --- */ 16320: int CreateGifFromEq ( char *expression, char *gifFileName ) 16321: { 16322: /* ------------------------------------------------------------------------- 16323: Allocations and Declarations 16324: -------------------------------------------------------------------------- */ 16325: int main(); /* main() akways returns an int */ 16326: /* --- set constants --- */ 16327: int argc = 4; /* count of args supplied to main() */ 16328: char *argv[5] = /* command line args to run with -e option */ 16329: { "MimeTeXWin32DLL", "-e", /* constant args */ 16330: /*gifFileName, expression,*/ NULL, NULL, NULL }; 16331: /* --- set argv[]'s not computable at load time --- */ 16332: argv[2] = gifFileName; /* args are -e gifFileName */ 16333: argv[3] = expression; /* and now -e gifFileName expression */ 16334: /* ------------------------------------------------------------------------- 16335: Run mimeTeX in command-line mode with -e (export) option, and then return 16336: -------------------------------------------------------------------------- */ 16337: return main ( argc, argv 16338: #ifdef DUMPENVP 16339: , NULL 16340: #endif 16341: ) ; 16342: } /* --- end-of-function CreateGifFromEq() --- */ 16343: 16344: 16345: /* ========================================================================== 16346: * Function: ismonth ( char *month ) 16347: * Purpose: returns 1 if month contains current month "jan"..."dec". 16348: * -------------------------------------------------------------------------- 16349: * Arguments: month (I) char * containing null-terminated string 16350: * in which "jan"..."dec" is (putatively) 16351: * contained as a substring. 16352: * -------------------------------------------------------------------------- 16353: * Returns: ( int ) 1 if month contains current month, 16354: * 0 otherwise 16355: * -------------------------------------------------------------------------- 16356: * Notes: o There's a three day "grace period", e.g., Dec 3 mtaches Nov. 16357: * ======================================================================= */ 16358: /* --- entry point --- */ 16359: int ismonth ( char *month ) 16360: { 16361: /* ------------------------------------------------------------------------- 16362: Allocations and Declarations 16363: -------------------------------------------------------------------------- */ 16364: int isokay = 0; /*1 if month contains current month*/ 16365: /*long time_val = 0L;*/ /* binary value returned by time() */ 16366: time_t time_val = (time_t)(0); /* binary value returned by time() */ 16367: struct tm *tmstruct=(struct tm *)NULL, *localtime(); /* interpret time_val */ 16368: int imonth, mday; /* current month 1-12 and day 1-31 */ 16369: int ngrace = 3; /* grace period */ 16370: char lcmonth[128]="\000"; int i=0; /* lowercase month */ 16371: static char *months[] = /* month must contain current one */ 16372: {"dec","jan","feb","mar","apr","may","jun", 16373: "jul","aug","sep","oct","nov","dec","jan"}; 16374: /* ------------------------------------------------------------------------- 16375: get current date:time info, and check month 16376: -------------------------------------------------------------------------- */ 16377: /* --- lowercase input month --- */ 16378: if ( month != NULL ) /* check that we got input */ 16379: for ( i=0; i<120 && *month!='\000'; i++,month++ ) /* go thru month chars */ 16380: lcmonth[i] = tolower(*month); /* lowerase each char in month */ 16381: if ( i < 2 ) goto end_of_job; /* must be invalid input */ 16382: lcmonth[i] = '\000'; /* null-terminate lcmonth[] */ 16383: /* --- get current date:time --- */ 16384: time((time_t *)(&time_val)); /* get date and time */ 16385: tmstruct = localtime((time_t *)(&time_val)); /* interpret time_val */ 16386: /* --- month and day --- */ 16387: imonth = 1 + (int)(tmstruct->tm_mon); /* 1=jan ... 12=dec */ 16388: mday = (int)(tmstruct->tm_mday); /* 1-31 */ 16389: if ( imonth<1 || imonth>12 /* quit if month out-of-range */ 16390: || mday<0 || mday>31 ) goto end_of_job; /* or date out of range */ 16391: /* --- check input month against current date --- */ 16392: if ( strstr(lcmonth,months[imonth]) != NULL ) isokay = 1; /* current month */ 16393: if ( mday <= ngrace ) /* 1-3 within grace period */ 16394: if ( strstr(lcmonth,months[imonth-1]) != NULL ) isokay = 1; /* last month */ 16395: if ( mday >= 31-ngrace ) /* 28-31 within grace period */ 16396: if ( strstr(lcmonth,months[imonth+1]) != NULL ) isokay = 1; /* next month */ 16397: end_of_job: 16398: return ( isokay ); /*1 if month contains current month*/ 16399: } /* --- end-of-function ismonth() --- */ 16400: 16401: 16402: /* ========================================================================== 16403: * Function: logger ( fp, msglevel, message, logvars ) 16404: * Purpose: Logs the environment variables specified in logvars 16405: * to fp if their msglevel is >= the passed msglevel. 16406: * -------------------------------------------------------------------------- 16407: * Arguments: fp (I) FILE * to file containing log 16408: * msglevel (I) int containing logging message level 16409: * message (I) char * to optional message, or NULL 16410: * logvars (I) logdata * to array of environment variables 16411: * to be logged 16412: * -------------------------------------------------------------------------- 16413: * Returns: ( int ) number of variables from logvars 16414: * that were actually logged 16415: * -------------------------------------------------------------------------- 16416: * Notes: o 16417: * ======================================================================= */ 16418: /* --- entry point --- */ 16419: int logger ( FILE *fp, int msglevel, char *message, logdata *logvars ) 16420: { 16421: /* ------------------------------------------------------------------------- 16422: Allocations and Declarations 16423: -------------------------------------------------------------------------- */ 16424: int ilog=0, nlogged=0; /* logvars[] index, #vars logged */ 16425: char *timestamp(); /* timestamp logged */ 16426: char *value = NULL; /* getenv(name) to be logged */ 16427: /* ------------------------------------------------------------------------- 16428: Log each variable 16429: -------------------------------------------------------------------------- */ 16430: fprintf(fp,"%s\n",timestamp(TZDELTA,0)); /*emit timestamp before first var*/ 16431: if ( message != NULL ) /* optional message supplied */ 16432: fprintf(fp," MESSAGE = %s\n",message); /* emit caller-supplied message */ 16433: if ( logvars != (logdata *)NULL ) /* have logvars */ 16434: for ( ilog=0; logvars[ilog].name != NULL; ilog++ ) /* till end-of-table */ 16435: if ( msglevel >= logvars[ilog].msglevel ) /* check msglevel for this var */ 16436: if ( (value=getenv(logvars[ilog].name)) /* getenv(name) to be logged */ 16437: != NULL ) /* check that name exists */ 16438: { 16439: fprintf(fp," %s = %.*s\n", /* emit variable name = value */ 16440: logvars[ilog].name,logvars[ilog].maxlen,value); 16441: nlogged++; /* bump #vars logged */ 16442: } /* --- end-of-for(ilog) --- */ 16443: return ( nlogged ); /* back to caller */ 16444: } /* --- end-of-function logger() --- */ 16445: 16446: 16447: /* ========================================================================== 16448: * Function: emitcache ( cachefile, maxage, valign, isbuffer ) 16449: * Purpose: dumps bytes from cachefile to stdout 16450: * -------------------------------------------------------------------------- 16451: * Arguments: cachefile (I) pointer to null-terminated char string 16452: * containing full path to file to be dumped, 16453: * or contains buffer of bytes to be dumped 16454: * maxage (I) int containing maxage, in seconds, for 16455: * http header, or -1 to not emit headers 16456: * valign (I) int containing Vertical-Align:, in pixels, 16457: * for http header, or <= -999 to not emit 16458: * isbuffer (I) 1 if cachefile is buffer of bytes to be 16459: * dumped 16460: * -------------------------------------------------------------------------- 16461: * Returns: ( int ) #bytes dumped (0 signals error) 16462: * -------------------------------------------------------------------------- 16463: * Notes: o 16464: * ======================================================================= */ 16465: /* --- entry point --- */ 16466: int emitcache ( char *cachefile, int maxage, int valign, int isbuffer ) 16467: { 16468: /* ------------------------------------------------------------------------- 16469: Allocations and Declarations 16470: -------------------------------------------------------------------------- */ 16471: int nbytes=gifSize, readcachefile(); /* read cache file */ 16472: FILE *emitptr = stdout; /* emit cachefile to stdout */ 16473: unsigned char buffer[MAXGIFSZ+1]; /* bytes from cachefile */ 16474: unsigned char *buffptr = buffer; /* ptr to buffer */ 16475: int isvalign = (abs(valign)<999?1:0); /* true to emit Vertical-Align: */ 16476: int iscontenttypecached = iscachecontenttype; /*true if headers cached*/ 16477: /* ------------------------------------------------------------------------- 16478: initialization 16479: -------------------------------------------------------------------------- */ 16480: /* --- check that files opened okay --- */ 16481: if ( emitptr == (FILE *)NULL ) /* failed to open emit file */ 16482: goto end_of_job; /* so return 0 bytes to caller */ 16483: /* --- read the file if necessary --- */ 16484: if ( isbuffer ) { /* cachefile is buffer */ 16485: buffptr = (unsigned char *)cachefile; /* so reset buffer pointer */ 16486: iscontenttypecached = 0; } /* and iscontenttypecached flag */ 16487: else { /* cachefile is file name */ 16488: if ( (nbytes = readcachefile(cachefile,buffer)) /* read the file */ 16489: < 1 ) goto end_of_job; } /* quit if file not read */ 16490: /* --- first emit http headers if requested --- */ 16491: if ( isemitcontenttype /* content-type lines enabled */ 16492: && !iscontenttypecached /* and not in cached image */ 16493: && maxage >= 0 ) /* caller wants http headers */ 16494: { /* --- emit mime content-type line --- */ 16495: fprintf( emitptr, "Cache-Control: max-age=%d\n",maxage ); 16496: fprintf( emitptr, "Content-Length: %d\n",nbytes ); 16497: if ( isvalign ) /* Vertical-Align: header wanted */ 16498: fprintf( emitptr, "Vertical-Align: %d\n",valign ); 16499: fprintf( emitptr, "Content-type: image/gif\n\n" ); } 16500: /* ------------------------------------------------------------------------- 16501: set stdout to binary mode (for Windows) 16502: -------------------------------------------------------------------------- */ 16503: /* emitptr = fdopen(STDOUT_FILENO,"wb"); */ /* doesn't work portably, */ 16504: #ifdef WINDOWS /* so instead... */ 16505: #ifdef HAVE_SETMODE /* prefer (non-portable) setmode() */ 16506: if ( setmode ( fileno (stdout), O_BINARY) /* windows specific call */ 16507: == -1 ) ; /* handle error */ /* sets stdout to binary mode */ 16508: #else /* setmode() not available */ 16509: #if 1 16510: freopen ("CON", "wb", stdout); /* freopen() stdout binary */ 16511: #else 16512: stdout = fdopen (STDOUT_FILENO, "wb"); /* fdopen() stdout binary */ 16513: #endif 16514: #endif 16515: #endif 16516: /* ------------------------------------------------------------------------- 16517: emit bytes from cachefile 16518: -------------------------------------------------------------------------- */ 16519: /* --- write bytes to stdout --- */ 16520: if ( fwrite(buffptr,sizeof(unsigned char),nbytes,emitptr) /* write buffer */ 16521: < nbytes ) /* failed to write all bytes */ 16522: nbytes = 0; /* reset total count to 0 */ 16523: end_of_job: 16524: return ( nbytes ); /* back with #bytes emitted */ 16525: } /* --- end-of-function emitcache() --- */ 16526: 16527: 16528: /* ========================================================================== 16529: * Function: readcachefile ( cachefile, buffer ) 16530: * Purpose: read cachefile into buffer 16531: * -------------------------------------------------------------------------- 16532: * Arguments: cachefile (I) pointer to null-terminated char string 16533: * containing full path to file to be read 16534: * buffer (O) pointer to unsigned char string 16535: * returning contents of cachefile 16536: * (max 64000 bytes) 16537: * -------------------------------------------------------------------------- 16538: * Returns: ( int ) #bytes read (0 signals error) 16539: * -------------------------------------------------------------------------- 16540: * Notes: o 16541: * ======================================================================= */ 16542: /* --- entry point --- */ 16543: int readcachefile ( char *cachefile, unsigned char *buffer ) 16544: { 16545: /* ------------------------------------------------------------------------- 16546: Allocations and Declarations 16547: -------------------------------------------------------------------------- */ 16548: FILE *cacheptr = fopen(cachefile,"rb"); /*open cachefile for binary read*/ 16549: unsigned char cachebuff[64]; /* bytes from cachefile */ 16550: int buflen = 32, /* #bytes we try to read from file */ 16551: nread = 0, /* #bytes actually read from file */ 16552: maxbytes = MAXGIFSZ, /* max #bytes returned in buffer */ 16553: nbytes = 0; /* total #bytes read */ 16554: /* ------------------------------------------------------------------------- 16555: initialization 16556: -------------------------------------------------------------------------- */ 16557: /* --- check that files opened okay --- */ 16558: if ( cacheptr == (FILE *)NULL ) goto end_of_job; /*failed to open cachefile*/ 16559: /* --- check that output buffer provided --- */ 16560: if ( buffer == (unsigned char *)NULL ) goto end_of_job; /* no buffer */ 16561: /* ------------------------------------------------------------------------- 16562: read bytes from cachefile 16563: -------------------------------------------------------------------------- */ 16564: while ( 1 ) 16565: { 16566: /* --- read bytes from cachefile --- */ 16567: nread = fread(cachebuff,sizeof(unsigned char),buflen,cacheptr); /* read */ 16568: if ( nbytes + nread > maxbytes ) /* block too big for buffer */ 16569: nread = maxbytes - nbytes; /* so truncate it */ 16570: if ( nread < 1 ) break; /* no bytes left in cachefile */ 16571: /* --- store bytes in buffer --- */ 16572: memcpy(buffer+nbytes,cachebuff,nread); /* copy current block to buffer */ 16573: /* --- ready to read next block --- */ 16574: nbytes += nread; /* bump total #bytes emitted */ 16575: if ( nread < buflen ) break; /* no bytes left in cachefile */ 16576: if ( nbytes >= maxbytes ) break; /* avoid buffer overflow */ 16577: } /* --- end-of-while(1) --- */ 16578: end_of_job: 16579: if ( cacheptr != NULL ) fclose(cacheptr); /* close file if opened */ 16580: return ( nbytes ); /* back with #bytes emitted */ 16581: } /* --- end-of-function readcachefile() --- */ 16582: 16583: 16584: /* ========================================================================== 16585: * Function: advertisement ( expression, message ) 16586: * Purpose: wrap expression in advertisement message 16587: * -------------------------------------------------------------------------- 16588: * Arguments: expression (I/O) pointer to null-terminated char string 16589: * containing expression to be "wrapped", 16590: * and returning wrapped expression 16591: * message (I) pointer to null-terminated char string 16592: * containing template for advertisement 16593: * message, or NULL to use default message 16594: * -------------------------------------------------------------------------- 16595: * Returns: ( int ) 1 if successful, 0=error 16596: * -------------------------------------------------------------------------- 16597: * Notes: o 16598: * ======================================================================= */ 16599: /* --- entry point --- */ 16600: int advertisement ( char *expression, char *message ) 16601: { 16602: /* ------------------------------------------------------------------------- 16603: Allocations and Declarations 16604: -------------------------------------------------------------------------- */ 16605: /* --- advertisement template --- */ 16606: char *adtemplate = 16607: #if defined(ADVERTISEMENT) /* cc -DADVERTISEMENT=\"filename\" */ 16608: #include ADVERTISEMENT /* filename with advertisement */ 16609: #else /* formatted as illustrated below */ 16610: "\\begin{gather} {\\small\\text \\fbox{\\begin{gather}" 16611: "mime\\TeX rendering courtesy of\\\\" 16612: "\\homepagetext \\end{gather}}}\\\\" 16613: " %%beginmath%% %%expression%% %%endmath%% \\end{gather}" 16614: #endif 16615: ; /* terminating semicolon */ 16616: /* --- other variables --- */ 16617: char adbuffer[MAXEXPRSZ+2048]; /*construct wrapped expression here*/ 16618: char *beginmath = " ", /* start math mode */ 16619: *endmath = " "; /* end math mode */ 16620: int strreplace(); /* replace %%keywords%% with values*/ 16621: /* ------------------------------------------------------------------------- 16622: wrap expression in advertisement 16623: -------------------------------------------------------------------------- */ 16624: /* --- start with template --- */ 16625: if ( isempty(message) ) /* caller didn't supply message */ 16626: message = adtemplate; /* so use default message */ 16627: strcpy(adbuffer,message); /* copy message template to buffer */ 16628: /* --- replace %%beginmath%%...%%endmath%% --- */ 16629: strreplace(adbuffer,"%%beginmath%%",beginmath,0); 16630: strreplace(adbuffer,"%%endmath%%",endmath,0); 16631: /* --- replace %%expression%% in template with expression --- */ 16632: strreplace(adbuffer,"%%expression%%",expression,0); 16633: /* --- replace original expression --- */ 16634: strcpy(expression,adbuffer); /* expression now wrapped in ad */ 16635: return ( 1 ); /* always just return 1 */ 16636: } /* --- end-of-function advertisement() --- */ 16637: 16638: 16639: /* ========================================================================== 16640: * Function: crc16 ( s ) 16641: * Purpose: 16-bit crc of string s 16642: * -------------------------------------------------------------------------- 16643: * Arguments: s (I) pointer to null-terminated char string 16644: * whose crc is desired 16645: * -------------------------------------------------------------------------- 16646: * Returns: ( int ) 16-bit crc of s 16647: * -------------------------------------------------------------------------- 16648: * Notes: o From Numerical Recipes in C, 2nd ed, page 900. 16649: * ======================================================================= */ 16650: /* --- entry point --- */ 16651: int crc16 ( char *s ) 16652: { 16653: /* ------------------------------------------------------------------------- 16654: Compute the crc 16655: -------------------------------------------------------------------------- */ 16656: unsigned short crc = 0; /* returned crc */ 16657: int ibit; /* for(ibit) eight one-bit shifts */ 16658: while ( !isempty(s) ) { /* while there are still more chars*/ 16659: crc = (crc ^ (*s)<<8); /* add next char */ 16660: for ( ibit=0; ibit<8; ibit++ ) /* generator polynomial */ 16661: if ( crc & 0x8000 ) { crc<<=1; crc=crc^4129; } 16662: else crc <<= 1; 16663: s++; /* next xhar */ 16664: } /* --- end-of-while(!isempty(s)) --- */ 16665: return ( (int)crc ); /* back to caller with crc */ 16666: } /* --- end-of-function crc16() --- */ 16667: 16668: 16669: /* ========================================================================== 16670: * Function: md5str ( instr ) 16671: * Purpose: returns null-terminated character string containing 16672: * md5 hash of instr (input string) 16673: * -------------------------------------------------------------------------- 16674: * Arguments: instr (I) pointer to null-terminated char string 16675: * containing input string whose md5 hash 16676: * is desired 16677: * -------------------------------------------------------------------------- 16678: * Returns: ( char * ) ptr to null-terminated 32-character 16679: * md5 hash of instr 16680: * -------------------------------------------------------------------------- 16681: * Notes: o Other md5 library functions are included below. 16682: * They're all taken from Christophe Devine's code, 16683: * which (as of 04-Aug-2004) is available from 16684: * http://www.cr0.net:8040/code/crypto/md5/ 16685: * o The P,F,S macros in the original code are replaced 16686: * by four functions P1()...P4() to accommodate a problem 16687: * with Compaq's vax/vms C compiler. 16688: * ======================================================================= */ 16689: /* --- #include "md5.h" --- */ 16690: #ifndef uint8 16691: #define uint8 unsigned char 16692: #endif 16693: #ifndef uint32 16694: #define uint32 unsigned long int 16695: #endif 16696: typedef struct 16697: { uint32 total[2]; 16698: uint32 state[4]; 16699: uint8 buffer[64]; 16700: } md5_context; 16701: void md5_starts( md5_context *ctx ); 16702: void md5_update( md5_context *ctx, uint8 *input, uint32 length ); 16703: void md5_finish( md5_context *ctx, uint8 digest[16] ); 16704: /* --- md5.h --- */ 16705: #define GET_UINT32(n,b,i) \ 16706: { (n) = ( (uint32) (b)[(i) ] ) \ 16707: | ( (uint32) (b)[(i) + 1] << 8 ) \ 16708: | ( (uint32) (b)[(i) + 2] << 16 ) \ 16709: | ( (uint32) (b)[(i) + 3] << 24 ); } 16710: #define PUT_UINT32(n,b,i) \ 16711: { (b)[(i) ] = (uint8) ( (n) ); \ 16712: (b)[(i) + 1] = (uint8) ( (n) >> 8 ); \ 16713: (b)[(i) + 2] = (uint8) ( (n) >> 16 ); \ 16714: (b)[(i) + 3] = (uint8) ( (n) >> 24 ); } 16715: /* --- P,S,F macros defined as functions --- */ 16716: void P1(uint32 *X,uint32 *a,uint32 b,uint32 c,uint32 d,int k,int s,uint32 t) 16717: { *a += (uint32)(d ^ (b & (c ^ d))) + X[k] + t; 16718: *a = ((*a<<s) | ((*a & 0xFFFFFFFF) >> (32-s))) + b; 16719: return; } 16720: void P2(uint32 *X,uint32 *a,uint32 b,uint32 c,uint32 d,int k,int s,uint32 t) 16721: { *a += (uint32)(c ^ (d & (b ^ c))) + X[k] + t; 16722: *a = ((*a<<s) | ((*a & 0xFFFFFFFF) >> (32-s))) + b; 16723: return; } 16724: void P3(uint32 *X,uint32 *a,uint32 b,uint32 c,uint32 d,int k,int s,uint32 t) 16725: { *a += (uint32)(b ^ c ^ d) + X[k] + t; 16726: *a = ((*a<<s) | ((*a & 0xFFFFFFFF) >> (32-s))) + b; 16727: return; } 16728: void P4(uint32 *X,uint32 *a,uint32 b,uint32 c,uint32 d,int k,int s,uint32 t) 16729: { *a += (uint32)(c ^ (b | ~d)) + X[k] + t; 16730: *a = ((*a<<s) | ((*a & 0xFFFFFFFF) >> (32-s))) + b; 16731: return; } 16732: 16733: /* --- entry point (this one little stub written by me)--- */ 16734: char *md5str( char *instr ) 16735: { static char outstr[64]; 16736: unsigned char md5sum[16]; 16737: md5_context ctx; 16738: int j; 16739: md5_starts( &ctx ); 16740: md5_update( &ctx, (uint8 *)instr, strlen(instr) ); 16741: md5_finish( &ctx, md5sum ); 16742: for( j=0; j<16; j++ ) 16743: sprintf( outstr + j*2, "%02x", md5sum[j] ); 16744: outstr[32] = '\000'; 16745: return ( outstr ); } 16746: 16747: /* --- entry point (all md5 functions below by Christophe Devine) --- */ 16748: void md5_starts( md5_context *ctx ) 16749: { ctx->total[0] = 0; 16750: ctx->total[1] = 0; 16751: ctx->state[0] = 0x67452301; 16752: ctx->state[1] = 0xEFCDAB89; 16753: ctx->state[2] = 0x98BADCFE; 16754: ctx->state[3] = 0x10325476; } 16755: 16756: void md5_process( md5_context *ctx, uint8 data[64] ) 16757: { uint32 X[16], A, B, C, D; 16758: GET_UINT32( X[0], data, 0 ); 16759: GET_UINT32( X[1], data, 4 ); 16760: GET_UINT32( X[2], data, 8 ); 16761: GET_UINT32( X[3], data, 12 ); 16762: GET_UINT32( X[4], data, 16 ); 16763: GET_UINT32( X[5], data, 20 ); 16764: GET_UINT32( X[6], data, 24 ); 16765: GET_UINT32( X[7], data, 28 ); 16766: GET_UINT32( X[8], data, 32 ); 16767: GET_UINT32( X[9], data, 36 ); 16768: GET_UINT32( X[10], data, 40 ); 16769: GET_UINT32( X[11], data, 44 ); 16770: GET_UINT32( X[12], data, 48 ); 16771: GET_UINT32( X[13], data, 52 ); 16772: GET_UINT32( X[14], data, 56 ); 16773: GET_UINT32( X[15], data, 60 ); 16774: A = ctx->state[0]; 16775: B = ctx->state[1]; 16776: C = ctx->state[2]; 16777: D = ctx->state[3]; 16778: P1( X, &A, B, C, D, 0, 7, 0xD76AA478 ); 16779: P1( X, &D, A, B, C, 1, 12, 0xE8C7B756 ); 16780: P1( X, &C, D, A, B, 2, 17, 0x242070DB ); 16781: P1( X, &B, C, D, A, 3, 22, 0xC1BDCEEE ); 16782: P1( X, &A, B, C, D, 4, 7, 0xF57C0FAF ); 16783: P1( X, &D, A, B, C, 5, 12, 0x4787C62A ); 16784: P1( X, &C, D, A, B, 6, 17, 0xA8304613 ); 16785: P1( X, &B, C, D, A, 7, 22, 0xFD469501 ); 16786: P1( X, &A, B, C, D, 8, 7, 0x698098D8 ); 16787: P1( X, &D, A, B, C, 9, 12, 0x8B44F7AF ); 16788: P1( X, &C, D, A, B, 10, 17, 0xFFFF5BB1 ); 16789: P1( X, &B, C, D, A, 11, 22, 0x895CD7BE ); 16790: P1( X, &A, B, C, D, 12, 7, 0x6B901122 ); 16791: P1( X, &D, A, B, C, 13, 12, 0xFD987193 ); 16792: P1( X, &C, D, A, B, 14, 17, 0xA679438E ); 16793: P1( X, &B, C, D, A, 15, 22, 0x49B40821 ); 16794: P2( X, &A, B, C, D, 1, 5, 0xF61E2562 ); 16795: P2( X, &D, A, B, C, 6, 9, 0xC040B340 ); 16796: P2( X, &C, D, A, B, 11, 14, 0x265E5A51 ); 16797: P2( X, &B, C, D, A, 0, 20, 0xE9B6C7AA ); 16798: P2( X, &A, B, C, D, 5, 5, 0xD62F105D ); 16799: P2( X, &D, A, B, C, 10, 9, 0x02441453 ); 16800: P2( X, &C, D, A, B, 15, 14, 0xD8A1E681 ); 16801: P2( X, &B, C, D, A, 4, 20, 0xE7D3FBC8 ); 16802: P2( X, &A, B, C, D, 9, 5, 0x21E1CDE6 ); 16803: P2( X, &D, A, B, C, 14, 9, 0xC33707D6 ); 16804: P2( X, &C, D, A, B, 3, 14, 0xF4D50D87 ); 16805: P2( X, &B, C, D, A, 8, 20, 0x455A14ED ); 16806: P2( X, &A, B, C, D, 13, 5, 0xA9E3E905 ); 16807: P2( X, &D, A, B, C, 2, 9, 0xFCEFA3F8 ); 16808: P2( X, &C, D, A, B, 7, 14, 0x676F02D9 ); 16809: P2( X, &B, C, D, A, 12, 20, 0x8D2A4C8A ); 16810: P3( X, &A, B, C, D, 5, 4, 0xFFFA3942 ); 16811: P3( X, &D, A, B, C, 8, 11, 0x8771F681 ); 16812: P3( X, &C, D, A, B, 11, 16, 0x6D9D6122 ); 16813: P3( X, &B, C, D, A, 14, 23, 0xFDE5380C ); 16814: P3( X, &A, B, C, D, 1, 4, 0xA4BEEA44 ); 16815: P3( X, &D, A, B, C, 4, 11, 0x4BDECFA9 ); 16816: P3( X, &C, D, A, B, 7, 16, 0xF6BB4B60 ); 16817: P3( X, &B, C, D, A, 10, 23, 0xBEBFBC70 ); 16818: P3( X, &A, B, C, D, 13, 4, 0x289B7EC6 ); 16819: P3( X, &D, A, B, C, 0, 11, 0xEAA127FA ); 16820: P3( X, &C, D, A, B, 3, 16, 0xD4EF3085 ); 16821: P3( X, &B, C, D, A, 6, 23, 0x04881D05 ); 16822: P3( X, &A, B, C, D, 9, 4, 0xD9D4D039 ); 16823: P3( X, &D, A, B, C, 12, 11, 0xE6DB99E5 ); 16824: P3( X, &C, D, A, B, 15, 16, 0x1FA27CF8 ); 16825: P3( X, &B, C, D, A, 2, 23, 0xC4AC5665 ); 16826: P4( X, &A, B, C, D, 0, 6, 0xF4292244 ); 16827: P4( X, &D, A, B, C, 7, 10, 0x432AFF97 ); 16828: P4( X, &C, D, A, B, 14, 15, 0xAB9423A7 ); 16829: P4( X, &B, C, D, A, 5, 21, 0xFC93A039 ); 16830: P4( X, &A, B, C, D, 12, 6, 0x655B59C3 ); 16831: P4( X, &D, A, B, C, 3, 10, 0x8F0CCC92 ); 16832: P4( X, &C, D, A, B, 10, 15, 0xFFEFF47D ); 16833: P4( X, &B, C, D, A, 1, 21, 0x85845DD1 ); 16834: P4( X, &A, B, C, D, 8, 6, 0x6FA87E4F ); 16835: P4( X, &D, A, B, C, 15, 10, 0xFE2CE6E0 ); 16836: P4( X, &C, D, A, B, 6, 15, 0xA3014314 ); 16837: P4( X, &B, C, D, A, 13, 21, 0x4E0811A1 ); 16838: P4( X, &A, B, C, D, 4, 6, 0xF7537E82 ); 16839: P4( X, &D, A, B, C, 11, 10, 0xBD3AF235 ); 16840: P4( X, &C, D, A, B, 2, 15, 0x2AD7D2BB ); 16841: P4( X, &B, C, D, A, 9, 21, 0xEB86D391 ); 16842: ctx->state[0] += A; 16843: ctx->state[1] += B; 16844: ctx->state[2] += C; 16845: ctx->state[3] += D; } 16846: 16847: void md5_update( md5_context *ctx, uint8 *input, uint32 length ) 16848: { uint32 left, fill; 16849: if( length < 1 ) return; 16850: left = ctx->total[0] & 0x3F; 16851: fill = 64 - left; 16852: ctx->total[0] += length; 16853: ctx->total[0] &= 0xFFFFFFFF; 16854: if( ctx->total[0] < length ) 16855: ctx->total[1]++; 16856: if( left && length >= fill ) 16857: { memcpy( (void *) (ctx->buffer + left), 16858: (void *) input, fill ); 16859: md5_process( ctx, ctx->buffer ); 16860: length -= fill; 16861: input += fill; 16862: left = 0; } 16863: while( length >= 64 ) 16864: { md5_process( ctx, input ); 16865: length -= 64; 16866: input += 64; } 16867: if( length >= 1 ) 16868: memcpy( (void *) (ctx->buffer + left), 16869: (void *) input, length ); } 16870: 16871: void md5_finish( md5_context *ctx, uint8 digest[16] ) 16872: { static uint8 md5_padding[64] = 16873: { 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16874: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16875: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16876: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; 16877: uint32 last, padn; 16878: uint32 high, low; 16879: uint8 msglen[8]; 16880: high = ( ctx->total[0] >> 29 ) 16881: | ( ctx->total[1] << 3 ); 16882: low = ( ctx->total[0] << 3 ); 16883: PUT_UINT32( low, msglen, 0 ); 16884: PUT_UINT32( high, msglen, 4 ); 16885: last = ctx->total[0] & 0x3F; 16886: padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last ); 16887: md5_update( ctx, md5_padding, padn ); 16888: md5_update( ctx, msglen, 8 ); 16889: PUT_UINT32( ctx->state[0], digest, 0 ); 16890: PUT_UINT32( ctx->state[1], digest, 4 ); 16891: PUT_UINT32( ctx->state[2], digest, 8 ); 16892: PUT_UINT32( ctx->state[3], digest, 12 ); } 16893: /* --- end-of-function md5str() and "friends" --- */ 16894: 16895: 16896: #if defined(GIF) 16897: /* ========================================================================== 16898: * Function: GetPixel ( int x, int y ) 16899: * Purpose: callback for GIF_CompressImage() returning the 16900: * pixel at column x, row y 16901: * -------------------------------------------------------------------------- 16902: * Arguments: x (I) int containing column=0...width-1 16903: * of desired pixel 16904: * y (I) int containing row=0...height-1 16905: * of desired pixel 16906: * -------------------------------------------------------------------------- 16907: * Returns: ( int ) 0 or 1, if pixel at x,y is off or on 16908: * -------------------------------------------------------------------------- 16909: * Notes: o 16910: * ======================================================================= */ 16911: /* --- entry point --- */ 16912: int GetPixel ( int x, int y ) 16913: { 16914: int ipixel = y*raster_width + x; /* pixel index for x,y-coords*/ 16915: int pixval =0; /* value of pixel */ 16916: if ( !isaa ) /* use bitmap if not anti-aliased */ 16917: pixval = (int)getlongbit(bitmap_raster->pixmap,ipixel); /*pixel = 0 or 1*/ 16918: else /* else use anti-aliased grayscale*/ 16919: pixval = (int)(colormap_raster[ipixel]); /* colors[] index number */ 16920: if ( msgfp!=NULL && msglevel>=9999 ) /* dump pixel */ 16921: { fprintf(msgfp,"GetPixel> x=%d, y=%d pixel=%d\n",x,y,pixval); 16922: fflush(msgfp); } 16923: return pixval; 16924: } /* --- end-of-function GetPixel() --- */ 16925: #endif /* gif */ 16926: #endif /* driver */ 16927: #endif /* PART1 */ 16928: /* ======================= END-OF-FILE MIMETEX.C ========================= */ 16929: