/**
* Generate a diff, no caching
*
* @param $otext String: old text, must be already segmented
* @param $ntext String: new text, must be already segmented
*/
function generateDiffBody($otext, $ntext)
{
global $wgExternalDiffEngine, $wgContLang;
wfProfileIn(__METHOD__);
$otext = str_replace("\r\n", "\n", $otext);
$ntext = str_replace("\r\n", "\n", $ntext);
$this->initDiffEngines();
if ($wgExternalDiffEngine == 'wikidiff' && function_exists('wikidiff_do_diff')) {
# For historical reasons, external diff engine expects
# input text to be HTML-escaped already
$otext = htmlspecialchars($wgContLang->segmentForDiff($otext));
$ntext = htmlspecialchars($wgContLang->segmentForDiff($ntext));
wfProfileOut(__METHOD__);
return $wgContLang->unsegmentForDiff(wikidiff_do_diff($otext, $ntext, 2)) . $this->debug('wikidiff1');
}
if ($wgExternalDiffEngine == 'wikidiff2' && function_exists('wikidiff2_do_diff')) {
# Better external diff engine, the 2 may some day be dropped
# This one does the escaping and segmenting itself
wfProfileIn('wikidiff2_do_diff');
$text = wikidiff2_do_diff($otext, $ntext, 2);
$text .= $this->debug('wikidiff2');
wfProfileOut('wikidiff2_do_diff');
wfProfileOut(__METHOD__);
return $text;
}
if ($wgExternalDiffEngine != 'wikidiff3' && $wgExternalDiffEngine !== false) {
# Diff via the shell
global $wgTmpDirectory;
$tempName1 = tempnam($wgTmpDirectory, 'diff_');
$tempName2 = tempnam($wgTmpDirectory, 'diff_');
$tempFile1 = fopen($tempName1, "w");
if (!$tempFile1) {
wfProfileOut(__METHOD__);
return false;
}
$tempFile2 = fopen($tempName2, "w");
if (!$tempFile2) {
wfProfileOut(__METHOD__);
return false;
}
fwrite($tempFile1, $otext);
fwrite($tempFile2, $ntext);
fclose($tempFile1);
fclose($tempFile2);
$cmd = wfEscapeShellArg($wgExternalDiffEngine, $tempName1, $tempName2);
wfProfileIn(__METHOD__ . "-shellexec");
$difftext = wfShellExec($cmd);
$difftext .= $this->debug("external {$wgExternalDiffEngine}");
wfProfileOut(__METHOD__ . "-shellexec");
unlink($tempName1);
unlink($tempName2);
wfProfileOut(__METHOD__);
return $difftext;
}
# Native PHP diff
$ota = explode("\n", $wgContLang->segmentForDiff($otext));
$nta = explode("\n", $wgContLang->segmentForDiff($ntext));
$diffs = new Diff($ota, $nta);
$formatter = new TableDiffFormatter();
$difftext = $wgContLang->unsegmentForDiff($formatter->format($diffs)) . wfProfileOut(__METHOD__);
return $difftext;
}
";
dl( 'php_wikidiff.so' );
function randomString( $length, $nullOk = false, $ascii = false ) {
$out = '';
for( $i = 0; $i < $length; $i++ )
$out .= chr( mt_rand( $nullOk ? 0 : 1, $ascii ? 127 : 255 ) );
return $out;
}
$size = 100000;
$maxruns = 1000;
$membase = memory_get_usage();
for( $i = 0; $i <= $maxruns; $i++ ) {
$x = memory_get_usage() - $membase;
printf( "%5d: up %d bytes\n", $i, $x );
$a = randomString( $size );
$b = randomString( $size );
$c = wikidiff_do_diff( $a, $b, 1 );
$a = '';
$b = '';
$c = '';
}
echo "(" . (memory_get_usage() - $membase) . " used)\n";
/**
* Generate a diff, no caching
* $otext and $ntext must be already segmented
*/
function generateDiffBody($otext, $ntext)
{
global $wgExternalDiffEngine, $wgContLang;
$fname = 'DifferenceEngine::generateDiffBody';
$otext = str_replace("\r\n", "\n", $otext);
$ntext = str_replace("\r\n", "\n", $ntext);
if ($wgExternalDiffEngine == 'wikidiff') {
# For historical reasons, external diff engine expects
# input text to be HTML-escaped already
$otext = htmlspecialchars($wgContLang->segmentForDiff($otext));
$ntext = htmlspecialchars($wgContLang->segmentForDiff($ntext));
if (!function_exists('wikidiff_do_diff')) {
dl('php_wikidiff.so');
}
return $wgContLang->unsegementForDiff(wikidiff_do_diff($otext, $ntext, 2));
}
if ($wgExternalDiffEngine == 'wikidiff2') {
# Better external diff engine, the 2 may some day be dropped
# This one does the escaping and segmenting itself
if (!function_exists('wikidiff2_do_diff')) {
wfProfileIn("{$fname}-dl");
@dl('php_wikidiff2.so');
wfProfileOut("{$fname}-dl");
}
if (function_exists('wikidiff2_do_diff')) {
wfProfileIn('wikidiff2_do_diff');
$text = wikidiff2_do_diff($otext, $ntext, 2);
wfProfileOut('wikidiff2_do_diff');
return $text;
}
}
if ($wgExternalDiffEngine !== false) {
# Diff via the shell
global $wgTmpDirectory;
$tempName1 = tempnam($wgTmpDirectory, 'diff_');
$tempName2 = tempnam($wgTmpDirectory, 'diff_');
$tempFile1 = fopen($tempName1, "w");
if (!$tempFile1) {
wfProfileOut($fname);
return false;
}
$tempFile2 = fopen($tempName2, "w");
if (!$tempFile2) {
wfProfileOut($fname);
return false;
}
fwrite($tempFile1, $otext);
fwrite($tempFile2, $ntext);
fclose($tempFile1);
fclose($tempFile2);
$cmd = wfEscapeShellArg($wgExternalDiffEngine, $tempName1, $tempName2);
wfProfileIn("{$fname}-shellexec");
$difftext = wfShellExec($cmd);
wfProfileOut("{$fname}-shellexec");
unlink($tempName1);
unlink($tempName2);
return $difftext;
}
# Native PHP diff
$ota = explode("\n", $wgContLang->segmentForDiff($otext));
$nta = explode("\n", $wgContLang->segmentForDiff($ntext));
$diffs =& new Diff($ota, $nta);
$formatter =& new TableDiffFormatter();
return $wgContLang->unsegmentForDiff($formatter->format($diffs));
}
<?php
dl("php_wikidiff.so");
$f1 = implode("\n", file("t1.txt"));
$f2 = implode("\n", file("t2.txt"));
# performance test
for ($i = 0; $i < 100; ++$i) {
$v = wikidiff_do_diff($f1, $f2, 2);
}
function getDiff($otext, $ntext, $otitle, $ntitle)
{
global $wgUseExternalDiffEngine, $wgContLang;
$out = "\n\t\t\t<table border='0' width='98%' cellpadding='0' cellspacing='4' class='diff'>\n\t\t\t<tr>\n\t\t\t\t<td colspan='2' width='50%' align='center' class='diff-otitle'>{$otitle}</td>\n\t\t\t\t<td colspan='2' width='50%' align='center' class='diff-ntitle'>{$ntitle}</td>\n\t\t\t</tr>\n\t\t";
$otext = $wgContLang->segmentForDiff($otext);
$ntext = $wgContLang->segmentForDiff($ntext);
$difftext = '';
if ($wgUseExternalDiffEngine) {
# For historical reasons, external diff engine expects
# input text to be HTML-escaped already
$otext = str_replace("\r\n", "\n", htmlspecialchars($otext));
$ntext = str_replace("\r\n", "\n", htmlspecialchars($ntext));
if (!function_exists('wikidiff_do_diff')) {
dl('php_wikidiff.so');
}
$difftext = wikidiff_do_diff($otext, $ntext, 2);
} else {
$ota = explode("\n", str_replace("\r\n", "\n", $otext));
$nta = explode("\n", str_replace("\r\n", "\n", $ntext));
$diffs =& new Diff($ota, $nta);
$formatter =& new TableDiffFormatter();
$difftext = $formatter->format($diffs);
}
$difftext = $wgContLang->unsegmentForDiff($difftext);
$out .= $difftext . "</table>\n";
return $out;
}
