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some diff engine updates (only minor, but will hopefully not break anything)

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git-svn-id: file:///svn/phpbb/branches/phpBB-3_0_0@8692 89ea8834-ac86-4346-8a33-228a782c2dd0
This commit is contained in:
Meik Sievertsen
2008-07-28 13:27:08 +00:00
parent 8904d95d59
commit bba6488d3d
3 changed files with 46 additions and 21 deletions
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20
phpBB/includes/diff/engine.php
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@@ -17,21 +17,20 @@ if (!defined('IN_PHPBB'))
}
/**
* Code from pear.php.net, Text_Diff-0.2.1 (beta) package
* http://pear.php.net/package/Text_Diff/
* Code from pear.php.net, Text_Diff-1.0.0 package
* http://pear.php.net/package/Text_Diff/ (native engine)
*
* Modified by phpBB Group to meet our coding standards
* and being able to integrate into phpBB
*
* Class used internally by Diff to actually compute the diffs. This class is
* implemented using native PHP code.
* Class used internally by Text_Diff to actually compute the diffs. This
* class is implemented using native PHP code.
*
* The algorithm used here is mostly lifted from the perl module
* Algorithm::Diff (version 1.06) by Ned Konz, which is available at:
* http://www.perl.com/CPAN/authors/id/N/NE/NEDKONZ/Algorithm-Diff-1.06.zip
*
* More ideas are taken from:
* http://www.ics.uci.edu/~eppstein/161/960229.html
* More ideas are taken from: http://www.ics.uci.edu/~eppstein/161/960229.html
*
* Some ideas (and a bit of code) are taken from analyze.c, of GNU
* diffutils-2.7, which can be found at:
@@ -41,6 +40,8 @@ if (!defined('IN_PHPBB'))
* Geoffrey T. Dairiki <dairiki@dairiki.org>. The original PHP version of this
* code was written by him, and is used/adapted with his permission.
*
* Copyright 2004-2008 The Horde Project (http://www.horde.org/)
*
* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
* @package diff
*
@@ -251,7 +252,7 @@ class diff_engine
}
}
$x1 = $xoff + (int)(($numer + ($xlim-$xoff)*$chunk) / $nchunks);
$x1 = $xoff + (int)(($numer + ($xlim - $xoff) * $chunk) / $nchunks);
for (; $x < $x1; $x++)
{
@@ -262,7 +263,8 @@ class diff_engine
}
$matches = $ymatches[$line];
foreach ($matches as $y)
reset($matches);
while (list(, $y) = each($matches))
{
if (empty($this->in_seq[$y]))
{
@@ -273,7 +275,7 @@ class diff_engine
}
// no reset() here
while (list($junk, $y) = each($matches))
while (list(, $y) = each($matches))
{
if ($y > $this->seq[$k - 1])
{