Return to run.pm CVS log

Up to [LON-CAPA] / loncom / xml

Annotation of loncom/xml/run.pm, revision 1.23

1.2       albertel    1: package Apache::run;
1.21      www         2: #
1.23    ! albertel    3: # $Id: run.pm,v 1.22 2001/12/11 15:48:51 albertel Exp $
1.21      www         4: #
                      5: # Copyright Michigan State University Board of Trustees
                      6: #
                      7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      8: #
                      9: # LON-CAPA is free software; you can redistribute it and/or modify
                     10: # it under the terms of the GNU General Public License as published by
                     11: # the Free Software Foundation; either version 2 of the License, or
                     12: # (at your option) any later version.
                     13: #
                     14: # LON-CAPA is distributed in the hope that it will be useful,
                     15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     17: # GNU General Public License for more details.
                     18: #
                     19: # You should have received a copy of the GNU General Public License
                     20: # along with LON-CAPA; if not, write to the Free Software
                     21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     22: #
                     23: # /home/httpd/html/adm/gpl.txt
                     24: #
                     25: # http://www.lon-capa.org/
                     26: #
1.1       sakharuk   27: 
1.10      albertel   28: sub evaluateold {
1.4       albertel   29:   my ($expression,$safeeval,$decls) = @_;
1.15      albertel   30: # print "inside2 evaluate $decls with $expression<br />\n";
1.3       albertel   31: # gerd's old method interpolates unset vars
1.5       albertel   32: # $safeeval->reval('return qq('.$expression.');');
1.22      albertel   33:   unless (defined($expression)) { return ''; }
1.7       albertel   34:   my $result = '';
                     35:   $@='';
1.9       sakharuk   36:   $safeeval->reval('$_=q|'.$expression.'|;');
1.7       albertel   37:   if ($@ eq '') {
1.9       sakharuk   38:     $safeeval->reval('{'.$decls.'$_=~s/(\$[A-Za-z]\w*)/(defined(eval($1))?eval($1):$1)/ge;}');
1.7       albertel   39:     if ($@ eq '') {
                     40:       $result = $safeeval->reval('return $_;');
                     41:     } else {
1.23    ! albertel   42:       &Apache::lonxml::error("substitution on:$expression:with:$decls:caused:$@:");
1.7       albertel   43:     }
                     44:   } else {
1.23    ! albertel   45:     &Apache::lonxml::error("defining:$expression:caused:$@:");
1.7       albertel   46:   }
1.10      albertel   47:   return $result
                     48: }
                     49: 
1.11      albertel   50: $Apache::run::EVALUATE_STRING=<<'ENDEVALUATE';  
                     51:   my %oldexpressions=();
                     52:   while (!$oldexpressions{$_}) {
                     53:     $oldexpressions{$_}=1;
1.13      www        54:     $_ =~s/((?:\$|\&)(?:[\#|\$]*[A-Za-z][\w]*|\{[A-Za-z][\w]*\}))([\[\{][^\$\&\]\}]+[\]\}])*?(\([^\$\&\)]+\))*?(?=[^\[\{\(]|$)/eval(defined(eval($1.$2))?eval('$1.$2.$3'):'$1.$2.$3')/seg;
1.11      albertel   55:   }
                     56: ENDEVALUATE
                     57: 
1.10      albertel   58: sub evaluate {
                     59:   my ($expression,$safeeval,$decls) = @_;
1.22      albertel   60:   unless (defined($expression)) { return ''; }
1.16      albertel   61:   if (!$Apache::lonxml::evaluate) { return $expression; }
1.10      albertel   62:   my $result = '';
                     63:   $@='';
1.11      albertel   64:   $safeeval->reval('{'.$decls.';$_=<<\'EXPRESSION\';'."\n".$expression.
                     65: 		   "\n".'EXPRESSION'."\n".$EVALUATE_STRING.'}');
                     66: #  $safeeval->reval('{'.$decls.';<< &evaluate(q|'.$expression.'|);}');
1.10      albertel   67:   if ($@ eq '') {
                     68:     $result = $safeeval->reval('return $_;');
1.13      www        69:     chomp $result;
1.10      albertel   70:   } else {
                     71:     &Apache::lonxml::error("substitution on:$expression:with:$decls:caused $@");
                     72:   }  
1.7       albertel   73:   return $result
1.2       albertel   74: }
                     75: 
                     76: sub run {
1.18      albertel   77:   my ($code,$safeeval,$hideerrors) = @_;
1.3       albertel   78: #  print "inside run\n";
1.7       albertel   79:   $@='';
1.14      albertel   80:   my (@result)=$safeeval->reval($code);
1.18      albertel   81:   if ($@ ne '' && !$hideerrors) {
1.23    ! albertel   82:     &Apache::lonxml::error(":$@: occured while running :$code:");
1.7       albertel   83:   }
1.14      albertel   84:   if ( $#result < '1') {
                     85:     return $result[0];
                     86:   } else {
                     87:     &Apache::lonxml::debug("<b>Got lots results</b>:$#result:");
                     88:     return (@result);
                     89:   }
1.2       albertel   90: }
                     91: 
1.19      albertel   92: sub dump {
                     93:   my ($target,$safeeval)=@_;
                     94:   my $dump='';
                     95:   foreach my $symname (sort keys %{$safeeval->varglob('main::')}) {
                     96:     if (($symname!~/^\_/) && ($symname!~/\:$/)) {
1.20      albertel   97:       if ($safeeval->reval('defined($'.$symname.')')) {
1.19      albertel   98: 	$dump.='$'.$symname.'='.$safeeval->reval('$'.$symname)."\n";
                     99:       }	
1.22      albertel  100:       if ($safeeval->reval('defined(@'.$symname.')')) {
1.19      albertel  101: 	$dump.='@'.$symname.'=('.
                    102: 	  $safeeval->reval('join(",",@'.$symname.')').")\n";
                    103:       }
1.22      albertel  104:       if ($safeeval->reval('defined(%'.$symname.')')) {
1.19      albertel  105: 	$dump.='%'.$symname.'=(';
                    106: 	$dump.=$safeeval->reval('join(",",map { $_."=>".$'.
                    107: 				$symname.'{$_} } sort keys %'.
                    108: 				$symname.')').")\n";
                    109:       }
                    110:     }
                    111:   }
                    112:   $dump.='';
                    113:   return $dump;
                    114: }
                    115: 
1.2       albertel  116: 1;
                    117: __END__;