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Diff for /loncom/xml/run.pm between versions 1.2 and 1.23

version 1.2, 2000/06/28 19:52:20 version 1.23, 2002/02/15 21:33:12
Line 1 Line 1
 package Apache::run;  package Apache::run;
   #
   # $Id$
   #
   # 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/
   #
   
   sub evaluateold {
     my ($expression,$safeeval,$decls) = @_;
   # print "inside2 evaluate $decls with $expression<br />\n";
   # gerd's old method interpolates unset vars
   # $safeeval->reval('return qq('.$expression.');');
     unless (defined($expression)) { return ''; }
     my $result = '';
     $@='';
     $safeeval->reval('$_=q|'.$expression.'|;');
     if ($@ eq '') {
       $safeeval->reval('{'.$decls.'$_=~s/(\$[A-Za-z]\w*)/(defined(eval($1))?eval($1):$1)/ge;}');
       if ($@ eq '') {
         $result = $safeeval->reval('return $_;');
       } else {
         &Apache::lonxml::error("substitution on:$expression:with:$decls:caused:$@:");
       }
     } else {
       &Apache::lonxml::error("defining:$expression:caused:$@:");
     }
     return $result
   }
   
   $Apache::run::EVALUATE_STRING=<<'ENDEVALUATE';  
     my %oldexpressions=();
     while (!$oldexpressions{$_}) {
       $oldexpressions{$_}=1;
       $_ =~s/((?:\$|\&)(?:[\#|\$]*[A-Za-z][\w]*|\{[A-Za-z][\w]*\}))([\[\{][^\$\&\]\}]+[\]\}])*?(\([^\$\&\)]+\))*?(?=[^\[\{\(]|$)/eval(defined(eval($1.$2))?eval('$1.$2.$3'):'$1.$2.$3')/seg;
     }
   ENDEVALUATE
   
 sub evaluate {  sub evaluate {
   my ($expression,$safeeval) = @_;    my ($expression,$safeeval,$decls) = @_;
   return $safeeval->reval($expression);    unless (defined($expression)) { return ''; }
     if (!$Apache::lonxml::evaluate) { return $expression; }
     my $result = '';
     $@='';
     $safeeval->reval('{'.$decls.';$_=<<\'EXPRESSION\';'."\n".$expression.
      "\n".'EXPRESSION'."\n".$EVALUATE_STRING.'}');
   #  $safeeval->reval('{'.$decls.';<< &evaluate(q|'.$expression.'|);}');
     if ($@ eq '') {
       $result = $safeeval->reval('return $_;');
       chomp $result;
     } else {
       &Apache::lonxml::error("substitution on:$expression:with:$decls:caused $@");
     }  
     return $result
 }  }
   
 sub run {  sub run {
   my ($code,$safeeval) = @_;    my ($code,$safeeval,$hideerrors) = @_;
   $safeeval->reval($code);  #  print "inside run\n";
     $@='';
     my (@result)=$safeeval->reval($code);
     if ($@ ne '' && !$hideerrors) {
       &Apache::lonxml::error(":$@: occured while running :$code:");
     }
     if ( $#result < '1') {
       return $result[0];
     } else {
       &Apache::lonxml::debug("<b>Got lots results</b>:$#result:");
       return (@result);
     }
   }
   
   sub dump {
     my ($target,$safeeval)=@_;
     my $dump='';
     foreach my $symname (sort keys %{$safeeval->varglob('main::')}) {
       if (($symname!~/^\_/) && ($symname!~/\:$/)) {
         if ($safeeval->reval('defined($'.$symname.')')) {
    $dump.='$'.$symname.'='.$safeeval->reval('$'.$symname)."\n";
         }
         if ($safeeval->reval('defined(@'.$symname.')')) {
    $dump.='@'.$symname.'=('.
     $safeeval->reval('join(",",@'.$symname.')').")\n";
         }
         if ($safeeval->reval('defined(%'.$symname.')')) {
    $dump.='%'.$symname.'=(';
    $dump.=$safeeval->reval('join(",",map { $_."=>".$'.
    $symname.'{$_} } sort keys %'.
    $symname.')').")\n";
         }
       }
     }
     $dump.='';
     return $dump;
 }  }
   
 1;  1;
Removed from v.1.2  
changed lines
  Added in v.1.23

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