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#!/usr/bin/perl =head1 SYNOPSIS hidiff old_file new_file =head1 DESCRIPTION Highlight the differences between two files using curses. The result of thinking, wouldn't it be nice to do "watch -d" on two files. =head1 NOTES This is not a diff-like utility, it doesn't yet doi Longest Common Sub +string cleverness so an insertion or deletion will throw the rest of the line +. If I can figure out a way (or ways) to represent a diff in curses highlights and colours then I might implement it. Ideas welcome. hidiff currently isn't rigorous about representing all differences, tabs, line-endings and non-ascii may cause problems. =head1 AUTHOR Brad Bowman, hidiff at bereft net =head1 COPYRIGHT Copyright (c) 2007 Brad Bowman. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. =cut use warnings; use strict; use Curses; my ($old_name, $new_name) = @ARGV; open my $old_fh, $old_name or die "Couldn't open $old_name: $!"; open my $new_fh, $new_name or die "Couldn't open $new_name: $!"; initscr; # Draw files while ( !eof($old_fh) || !eof($new_fh) ) { my $old_line = <$old_fh>; my $new_line = <$new_fh>; chomp($old_line); chomp($new_line); my $old_len = length($old_line); my $new_len = length($new_line); #die join ' ', map { ord($_) } split //, $new_line; my $max_len = ($old_len > $new_len) ? $old_len : $new_len; for my $i (0..$max_len-1) { my $oc = substr($old_line, $i, 1); my $nc = substr($new_line, $i, 1); if ($oc eq $nc) { addch($oc); } else { standout; addch( (ord($nc) != 0) ? $nc : ' '); standend; } } addch("\n"); } refresh; END { endwin; }

In reply to hidiff - char highlight diff utility by bsb

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