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diff --git a/Master/texmf-dist/source/latex/stex/bin/Modparse.pm b/Master/texmf-dist/source/latex/stex/bin/Modparse.pm
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+#######################################################################################
+# A module for loading .tex files and feeding the data to the various applications. #
+# Copyright (c) 2005, Ioan Sucan, released under the Gnu General Public License (GPL) #
+# see http://www.gnu.org/copyleft/gpl.html #
+# $URL: svn://kwarc.eecs.iu-bremen.de/repos/kwarc/projects/content/bin/Modparse.pm$ #
+# $Date: 2005-09-26 12:44:28 -0500 (Mon, 26 Sep 2005) $ $Rev: 4243 $ #
+#######################################################################################
+
+package Modparse;
+
+use File::Basename;
+use File::Path;
+
+# if both snippath and snippathList are specified,
+# snippathList is ignored !
+
+# if a default snippath definition file is found
+# (snippath.def) it is used if no snippath is given
+# as argument;
+sub new {
+ my ($class, %options) = @_;
+
+ $options{recursion} = 1 unless defined $options{recursion};
+ $options{requireStatus} = 'include|exclude' unless defined $options{requireStatus};
+ $options{loadInputs} = 1 unless defined $options{loadInputs};
+ $options{onlyModuleLines} = 0 unless defined $options{onlyModuleLines};
+
+ if ( !(%{$options{snippath}}) && (-e "snippath.def") ) {
+ open(SNIPPATHDEF, 'snippath.def');
+ my @snlist = <SNIPPATHDEF>;
+ close(SNIPPATHDEF);
+ for (my $i = 0 ; $i <= $#snlist; $i++) { chomp($snlist[$i]); }
+ %{$options{snippath}} = @snlist; }
+ @{$options{snippathList}} = keys(%{$options{snippath}})
+ if ($options{snippath} && %{$options{snippath}});
+ $options{debug} = 0;
+
+ bless(\%options, $class); }
+
+sub execute{
+ my ($self, $file) = @_;
+
+ local *run_event = sub {
+ my ($event, $arg) = @_;
+ if ($self->{$event}) { $self->{$event}($arg); }
+ };
+
+ local *go = sub {
+ my ($location, %param) = @_;
+ my ($tex, $path, @tex_data) = $self->readLocation($location);
+ return unless @tex_data;
+ my $NL = $#tex_data+1;
+
+ $param{filename} = $tex;
+ $param{depth}++;
+ $param{filecount}++;
+ my $i = 0;
+
+ $param{nextline} = sub { $tex_data[++$i]; };
+ $param{prevline} = sub { $tex_data[--$i]; };
+ $param{rewriteline}= sub { $tex_data[$i] = $_[0]; };
+
+ print "Processing $tex...\n" if $self->{verbose};
+ run_event('onBeginFile', \%param);
+
+ while ($i<$NL){
+ $param{original} = $tex_data[$i];
+ $_ = $tex_data[$i]; chomp; /([^%]*)((%.*)?)/;
+ ($param{tex}, $param{comment}) = ($1, $2); $_ = $1;
+ s/\s+//g; $param{simple_tex} = $_;
+
+ if (/\\begin\{module\}(\[([^\]]*)\])?/) {
+ if ($param{in_module}) {
+ push(@{$param{module_stack}}, [$param{module_id}, $param{module_arg}]); }
+ $param{in_module} = 1;
+ $param{module_args} = $1 ? $2 : undef;
+ $param{module_id} = ($param{module_args} &&
+ $param{module_args} =~ /id=([^\],]+)/) ? $1 : undef;
+ $param{module_nesting}++;
+ run_event('onBeginModule', \%param); }
+
+ if (/\\end\{module\}/) {
+ run_event('onEndModule', \%param);
+ if ($#{$param{module_stack}} >= 0) {
+ ($param{module_id}, $param{module_args}) = @{pop(@{$param{module_stack}})};
+ } else {
+ $param{in_module} = 0;
+ ($param{module_id}, $param{module_args}) = (undef, undef); }
+ $param{module_nesting}--;
+ }
+
+ foreach my $srch_snippath(@{$self->{snippathList}}){
+ $self->{snippath}{$srch_snippath} = $1
+ if (/\\def\\$srch_snippath\#1\{([^\#]+)\#1\}$/); }
+
+ if (/\\((requiremodules(\[($self->{requireStatus})\])?)|input|include)\{([^\}]+)\}/){
+ my $req_filename = $5; my $req_spath = ''; my $command = $1;
+ my $is_require = ($command =~ /requiremodules/) ? 1 : 0;
+ if ($is_require || $self->{loadInputs}) {
+ foreach my $srch_snippath(@{$self->{snippathList}}){
+ if ($req_filename =~ /\\$srch_snippath\{(.+)/){
+ ($req_spath, $req_filename) = ($self->{snippath}{$srch_snippath}, $1);
+ last; }}
+ run_event('onRecurse', \%param);
+ if ($self->{recursion} || !$is_require) {
+ go($self->makeLocation($req_filename, $path, $req_spath), %param); }
+ }
+ }
+ run_event('onEveryLine', \%param) if ($param{in_module} || !$self->{onlyModuleLines});
+
+ last if (/\\end\{document\}/ && $self->{stopAtEnd});
+ $i++;
+ }
+ run_event('onEndFile', \%param);
+ $param{depth}--; return;
+ };
+
+ my %param = (pack=>$self, perm=>$self->{_AUX_DATA}, depth=>0, filecount=>0,
+ in_module=>0, module_nesting=>0);
+ run_event('onBegin', \%param);
+ go($self->makeLocation($file), %param);
+ run_event('onEnd', \%param);
+ return;
+}
+
+
+# add a [.tex] extension to the filename
+sub add_ext{
+ my ($self, $fn, $ext) = @_;
+ $ext = '.tex' unless $ext;
+ $fn.=$ext if $fn !~ /\Q$ext\E$/;
+ $fn; }
+
+# as long as the extension is .tex, drop it
+sub drop_ext{
+ my ($self, $filename) = @_;
+ while ($filename =~ /\.tex$/){
+ while ($filename !~ /\.$/ ) { chop($filename); }
+ chop($filename); }
+ $filename; }
+
+sub new_ext{
+ my ($self, $filename, $ext) = @_;
+ $self->add_ext($self->drop_ext($filename), $ext); }
+
+# location = pointer to array of strings
+# first element is filename; next are possible paths
+sub makeLocation{ my $self = shift; return \@_; }
+
+# read a location into an array of strings
+# aslo return filename and path to it (just in
+# case some changes were made to it, like adding
+# extension and/or relative paths)
+sub readLocation{
+ my ($self, $location) = @_;
+
+ my ($filename, @paths) = @{$location};
+ # try to add proper extension;
+ my $filename_ext = $self->new_ext($filename) unless -e $filename;
+ $filename = $filename_ext if $filename_ext && -e $filename_ext;
+
+ # try search paths
+ if (! -e $filename){
+ my $all_p = '';
+ foreach my $p(@paths){
+ $all_p .= $p;
+ $filename = $all_p.$filename and last if -e $all_p.$filename;
+ $filename = $p.$filename and last if -e $p.$filename;
+ if ($filename_ext){
+ $filename = $all_p.$filename_ext and last if -e $all_p.$filename_ext;
+ $filename = $p.$filename_ext and last if -e $p.$filename_ext; }
+ }}
+ # don't do the same work too many times
+ foreach my $file(@{$self->{loadedFiles}})
+ { return undef if $file eq $filename; }
+
+ push(@{$self->{loadedFiles}}, $filename);
+ open(FIN, $filename) or die "Cannot open '$filename'\n";
+ my @data = <FIN>;
+ close(FIN);
+
+ # find path of current file
+ my $path = dirname($filename);
+ $path.='/' if ($path ne '');
+
+ return ($filename, $path, @data);
+}
+
+1;