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Diff for /loncom/homework/lonmaxima.pm between versions 1.1 and 1.29

-version 1.1, 2006/03/11 16:28:03
+version 1.29, 2010/06/14 11:34:18
  Line 31  package Apache::lonmaxima;
  use strict;
  use IO::Socket;
  use Apache::lonnet;
+ use Apache::response();
+ use LONCAPA;
  sub connect {
     return IO::Socket::UNIX->new(Peer    => $Apache::lonnet::perlvar{'lonSockDir'}.'/maximasock',
- Line 46  sub disconnect {
+ Line 48  sub disconnect {
  sub maximareply {
      my ($socket,$cmd)=@_;
      if ($socket) {
- 	print $socket &Apache::lonnet::escape($cmd)."\n";
+ 	print $socket &escape($cmd)."\n";
          my $reply=<$socket>;
          chomp($reply);
          if ($reply=~/^Incorrect/) { $reply='Error: '.$reply; }
-         return &Apache::lonnet::unescape($reply);
+         return &unescape($reply);
      } else {
          return 'Error: no connection.';
      }
- Line 58  sub maximareply {
+ Line 60  sub maximareply {
  sub blacklisted {
      my ($cmd)=@_;
-     foreach my $forbidden ('save','load','plot','lisp','includ','compil','file','batch','stringout','translat','stout','stin','block','system') {
+     foreach my $forbidden (
- 	if ($cmd=~/$forbidden/) { return 1; }
+         '\? ','\?','%i\d+','%o','batch','block'
+        ,'compil','concat','describe','display2d','file','inchar'
+        ,'includ','lisp','load','outchar','plot','quit'
+        ,'read','reset','save','stin','stout','stringout'
+        ,'system','translat','ttyoff','with_stdout','writefile'
+      ) {
+ 	if ($cmd=~/$forbidden/s) { return 1; }
      }
      return 0;
  }
+ sub maxima_allowed_libraries {
+    return (
+       "absimp","affine","atensor","atrig1","augmented_lagrangian","contrib_ode","ctensor","descriptive","diag",
+       "eigen","facexp","fft","fourie","functs","ggf","grobner","impdiff","ineq","interpol","itensor","lapack",
+       "lbfgs","lindstedt","linearalgebra","lsquares","makeOrders","mnewton","mchrpl","ntrig","orthopoly",
+       "quadpack","rducon","romberg","scifac","simplex","solve_rec","sqdnst","stats","sterling","sym","units",
+       "vect","zeilberger");
+ }
+ sub maxima_is_allowed_library {
+     my ($library)=@_;
+     foreach my $allowed_library (&maxima_allowed_libraries()) {
+        if ($library eq $allowed_library) { return 1; }
+     }
+     return 0;
+ }
+ sub runscript {
+     my ($socket,$fullscript,$libraries)=@_;
+     if (&blacklisted($fullscript)) { return 'Error: blacklisted'; }
+     my $reply;
+     $fullscript=~s/[\n\r\l]//gs;
+     if ($libraries) {
+        foreach my $library (split(/\s*\,\s*/,$libraries)) {
+           unless ($library=~/\w/) { next; }
+           if (&maxima_is_allowed_library($library)) {
+               $reply=&maximareply($socket,'load('.$library.')$'."\n");
+               if ($reply=~/^Error\:/) { return $reply; }
+           } else {
+              return 'Error: blacklisted';
+           }
+        }
+     }
+     foreach my $line (split(/\;/s,$fullscript)) {
+ 	if ($line=~/\w/) { $reply=&maximareply($socket,$line.";\n"); }
+ 	if ($reply=~/^Error\:/) { return $reply; }
+     }
+     $reply=~s/^\s*//gs;
+     $reply=~s/\s*$//gs;
+     &Apache::lonxml::debug("maxima $fullscript \n reply $reply");
+     return $reply;
+ }
+ sub maxima_cas_formula_fix {
+    my ($expression)=@_;
+    $expression=&Apache::response::implicit_multiplication($expression);
+    $expression=~s/([^\w\%])pi/$1\%pi/gs;
+    return $expression;
+ }
+ sub maxima_run {
+     my ($script,$submission,$argument,$libraries) = @_;
+     my $socket=&connect();
+     my @submissionarray=split(/\s*\,\s*/,$submission);
+     for (my $i=0;$i<=$#submissionarray;$i++) {
+         my $n=$i+1;
+         my $fixedsubmission=&maxima_cas_formula_fix($submissionarray[$i]);
+         $script=~s/RESPONSE\[$n\]/$fixedsubmission/gs;
+     }
+     my @argumentarray=@{$argument};
+     for (my $i=0;$i<=$#argumentarray;$i++) {
+         my $n=$i+1;
+         my $fixedargument=&maxima_cas_formula_fix($argumentarray[$i]);
+         $script=~s/LONCAPALIST\[$n\]/$fixedargument/gs;
+     }
+     my $reply=&runscript($socket,$script,$libraries);
+     &disconnect($socket);
+     if ($reply=~/^\s*true\s*$/i) { return 'EXACT_ANS'; }
+     if ($reply=~/^\s*false\s*$/i) { return 'INCORRECT'; }
+     return 'BAD_FORMULA';
+ }
+ sub maxima_eval {
+     my ($script,$libraries) = @_;
+     my $socket=&connect();
+     my $reply=&runscript($socket,$script,$libraries);
+     &disconnect($socket);
+     return $reply;
+ }
  sub compareterms {
      my ($socket,$terma,$termb)=@_;
-     my $difference=$terma.'-'.$termb;
+     my $difference=$terma.'-('.$termb.')';
      if (&blacklisted($difference)) { return 'Error: blacklisted'; }
      my $reply=&maximareply($socket,'trigsimp(trigreduce('.$difference.'));');
      if ($reply=~/^\s*0\s*$/) { return 'true'; }
      if ($reply=~/^Error\:/) { return $reply; }
      return 'false';
  }
+ sub maxima_check {
+     my ($response,$answer,$reterror) = @_;
+     my $socket=&connect();
+     my $reply=&compareterms($socket,$response,$answer);
+     &disconnect($socket);
+     # integer to string mappings come from capaParser.h
+     # 1 maps to 'EXACT_ANS'
+     if ($reply eq 'true') { return 1; }
+     # 11 maps to 'BAD_FORMULA'
+     if ($reply=~/^Error\:/) { return 11; }
+     # 7 maps to 'INCORRECT'
+     return 7;
+ }
 ;
  __END__;

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Removed from v.1.1
changed lines
	Added in v.1.29