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Annotation of loncom/debugging_tools/escape.pl, revision 1.2

1.1       matthew     1: #!/usr/bin/perl -w
                      2: #
                      3: # The LearningOnline Network
                      4: #
1.2     ! matthew     5: # escape.pl - escape special characters in files
1.1       matthew     6: #
1.2     ! matthew     7: # $Id: escape.pl,v 1.1 2002/08/19 14:37:14 matthew Exp $
1.1       matthew     8: #
                      9: # Copyright Michigan State University Board of Trustees
                     10: #
                     11: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     12: #
                     13: # LON-CAPA is free software; you can redistribute it and/or modify
                     14: # it under the terms of the GNU General Public License as published by
                     15: # the Free Software Foundation; either version 2 of the License, or
                     16: # (at your option) any later version.
                     17: #
                     18: # LON-CAPA is distributed in the hope that it will be useful,
                     19: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     20: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     21: # GNU General Public License for more details.
                     22: #
                     23: # You should have received a copy of the GNU General Public License
                     24: # along with LON-CAPA; if not, write to the Free Software
                     25: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     26: #
                     27: # /home/httpd/html/adm/gpl.txt
                     28: #
                     29: # http://www.lon-capa.org/
                     30: #
                     31: #################################################
                     32: use strict;
                     33: 
                     34: #
                     35: while (<>) {
                     36:     chomp;
                     37:     print &escape($_)."\n";
                     38: }
                     39: exit;
                     40: 
                     41: ######################################
                     42: 
                     43: sub unescape {
                     44:     my $str=shift;
                     45:     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
                     46:     return $str;
                     47: }
                     48: 
                     49: sub escape {
                     50:     my $str=shift;
                     51:     $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
                     52:     return $str;
                     53: }