--- loncom/homework/CAPA-converter/capaCommon.c	2001/07/11 23:00:57	1.7
+++ loncom/homework/CAPA-converter/capaCommon.c	2001/12/04 15:17:57	1.10
@@ -1,3 +1,30 @@
+/* The LearningOnline Network with CAPA
+ * Helaper functions for capa convertor. 
+ * $Id: capaCommon.c,v 1.10 2001/12/04 15:17:57 albertel Exp $
+ *
+ * Copyright Michigan State University Board of Trustees
+ *
+ * This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+ *
+ * LON-CAPA is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * LON-CAPA is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LON-CAPA; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * /home/httpd/html/adm/gpl.txt
+ *
+ * http://www.lon-capa.org/
+ */
+
 /* =||>|===================== capaCommon.c =====================|<||= */
 /* created 1994 by Isaac Tsai                                         */
 /* 1994, 1995, 1996, 1997, 1998, 1999  copyrighted by Isaac Tsai      */
@@ -153,8 +180,9 @@ extern  void       (*Status_Func)();
   begin_text();
   /*if ( !yyparse() )  { errcode = Lexi_qnum; } else { errcode = 0; }*/
   if (!(temp=yylex())) { errcode = Lexi_qnum; } else { errcode = 0; }
-  printf("\nExited on: %d\n",temp);
-  printf("Flushing:\n");
+  fprintf(stderr,"\nExited on: %d\n",temp);
+  fprintf(stderr,"Current cache: %d\n",current_cache);
+  fprintf(stderr,"Flushing:\n"); 
   flush_delayed();
   /* fclose(Input_stream[0]);*/ /*The Lexer handles closing this*/
   /* print_symb_stat(); */
@@ -169,26 +197,31 @@ extern  void       (*Status_Func)();
 
 int dyn_maxlen=1000000;
 int delay;
-void dyn_init()
+void dyn_init(struct dyn_string *dyn)
 {
-    dyn_delayed.len=0;
-    dyn_delayed.max=0;
-    dyn_delayed.str=NULL;
+    dyn->len=0;
+    dyn->max=0;
+    dyn->str=NULL;
 }
 
-/* this can be used to free up the str components if the output
-   compenants are used internally, as in the reinit code 
-*/
-void dyn_free()
+void dyn_free(struct dyn_string* dyn)
 {
-    if (dyn_delayed.str) {free(dyn_delayed.str);dyn_delayed.str=NULL;}
+    if (dyn->str) {
+      free(dyn->str);dyn->str=NULL;
+      dyn->len=0;
+      dyn->max=0;
+    }
 }
 
+
 int append_message(struct dyn_string *dyn_msg,char *format,va_list ap) {
     char *new;
     int len,result;
 
-    result=vasprintf(&new,format,ap);
+    if ((result=vasprintf(&new,format,ap))==-1) {
+      fprintf(stderr,"vaspintf didn't like :%s:",format);
+      exit(1);
+    }
     len=strlen(new);
 
 #ifdef DYN_DEBUG
@@ -237,52 +270,163 @@ void add_delayed(char *format, ...) {
 
     va_start(ap,format);
     append_message(&dyn_delayed,format,ap);
-}	
+    if (do_cache[current_cache]) {
+      append_message(&cached_data[current_cache],format,ap);
+    }	
+}
 
 void flush_delayed()
 {
-  if (dyn_delayed.str) fputs(dyn_delayed.str,stdout);
-  dyn_free();dyn_init();
   delay=0;
+  if (dyn_delayed.str) { send(dyn_delayed.str); }
+  dyn_free(&dyn_delayed);dyn_init(&dyn_delayed);
 }
 
-void send(char *text,...)
+
+void send_to(int which, char *text, va_list ap)
 {
-  va_list ap;
-  va_start(ap,text);
   if (delay) {
     append_message(&dyn_delayed,text,ap);
   } else {
-    vprintf(text,ap);
+    if (num_streams) {
+      if (which == ALL_STREAMS) {
+	int i;
+	for (i=0;i<num_streams;i++) { append_message(&streams[i],text,ap); }
+      } else {
+	append_message(&streams[which],text,ap);
+      }
+    } else {
+      vprintf(text,ap);
+    }
   }
+  if (do_cache[current_cache]) {
+    append_message(&cached_data[current_cache],text,ap);
+  }	
 }
 
+void send(char *text,...)
+{
+  va_list ap;
+  va_start(ap,text);
+  send_to(ALL_STREAMS,text,ap);
+}
+
+void send_stream(int which, char *text,...)
+{
+  va_list ap;
+  va_start(ap,text);
+  send_to(which,text,ap);
+}
+
+int num_streams=0;
+struct dyn_string streams[MAX_STREAMS];
+void start_streams(int num) {
+  int i;
+  for(i=0; i<num; i++) { dyn_init(&streams[i]); }
+  for(i=1; i<num; i++) { mode[i]=mode[0]; }
+  num_streams=num;
+}
+
+void end_streams(int which) {
+  int i;
+  fputs(streams[which].str,stdout);
+  for(i=0; i<num_streams; i++) { dyn_free(&streams[which]); }
+  num_streams=0;
+  mode[0]=mode[which];
+}
+
+int watch_mode[MAX_STREAMS];
 void end_mode()
 {
-  switch (mode) {
-  case MODE_COMMENT: send("</comment>\n"); break;
-  case MODE_BLOCK: send("</block>\n"); break;
-  case MODE_SCRIPT: send("</script>\n"); break;
-  case MODE_OUTTEXT: send("<endouttext />\n"); break;
-  case MODE_ANSWER: send("</answergroup>\n"); break;
+  end_mode_stream(ALL_STREAMS);
+}
+
+void end_mode_stream(int which)
+{
+  if (num_streams) {
+    if (which == ALL_STREAMS) {
+      int i;
+      for (i=0;i<num_streams;i++) { end_mode_stream(i); }
+      return;
+    }
+  } else {
+    which=0;/* if streams aren't active make sure which is correct */
+  }
+  switch (mode[which]) {
+  case MODE_COMMENT: send_stream(which,"</comment>\n"); break;
+  case MODE_BLOCK: send_stream(which,"</block>\n"); break;
+  case MODE_SCRIPT: send_stream(which,"</script>\n"); break;
+  case MODE_OUTTEXT: send_stream(which,"<endouttext />\n"); break;
+  case MODE_ANSWER: send_stream(which,"\n"); break;
+  case MODE_HINT: send_stream(which,"<endouttext />\n</hintpart>\n</hintgroup>\n"); break;
+  case MODE_IMPORT: send_stream(which,"</import>\n"); break;
   case MODE_NONE: break;
   }
-  mode=MODE_NONE;
+  mode[which]=MODE_NONE;
+  watch_mode[which]=0;
 }
 
 void start_mode(int newmode,char* args)
 {
-  if (newmode == mode) return;
-  end_mode();
+  start_mode_stream(ALL_STREAMS,newmode,args);
+}
+
+void start_mode_stream(int which,int newmode,char* args)
+{
+  if (num_streams) {
+    if (which == ALL_STREAMS) {
+      int i;
+      for (i=0;i<num_streams;i++) { start_mode_stream(i,newmode,args); }
+      return;
+    } else {
+      if (newmode == mode[which]) return;
+    }
+  } else {
+    if (newmode == mode[0]) return;
+    which=0;/* if streams aren't active make sure which is correct */
+  }
+  end_mode_stream(which);
   switch (newmode) {
-  case MODE_COMMENT: send("<comment>\n"); break;
-  case MODE_BLOCK: send("<block %s>\n",args); break;
-  case MODE_SCRIPT: send("<script type=\"loncapa/perl\">\n"); break;
-  case MODE_OUTTEXT: send("<startouttext />\n"); break;
-  case MODE_ANSWER: send("<answergroup>\n"); break;
+  case MODE_COMMENT: send_stream(which,"<comment>\n"); break;
+  case MODE_BLOCK: send_stream(which,"<block %s>\n",args); break;
+  case MODE_SCRIPT: send_stream(which,"<script type=\"loncapa/perl\">\n"); break;
+  case MODE_OUTTEXT: send_stream(which,"<startouttext />\n"); break;
+  case MODE_ANSWER: send_stream(which,"\n"); break;
+  case MODE_HINT: send_stream(which,"<hintgroup>\n<hintpart on=\"default\">\n<startouttext />\n"); break;
+  case MODE_IMPORT: send_stream(which,"<import>"); break;
   case MODE_NONE: break;
   }
-  mode=newmode;
+  mode[which]=newmode;
+}
+
+int current_cache=-1;
+int do_cache[MAX_CACHE];
+struct dyn_string cached_data[MAX_CACHE];
+
+void new_cache()
+{
+  current_cache++;
+  do_cache[current_cache]=1;
+  if (current_cache>MAX_CACHE) { exit(CACHE_ERROR); }
+  dyn_init(&cached_data[current_cache]);
+}
+
+void start_cache() 
+{
+  do_cache[current_cache]=1;
+}
+
+void stop_cache()
+{
+  do_cache[current_cache]=0;
+}
+
+void delete_cache()
+{
+  if (current_cache > -1) {
+    dyn_free(&cached_data[current_cache]);
+    current_cache--;
+  }
 }
 /* =||>|===================== End of capaCommon.c =====================|<||= */