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Exception.php��0000644��00000000361�14732046777�0007234 0��ustar�00��<?php /** * Exception for errors from the Text_Diff package. * * {@internal This is a WP native addition to the external Text_Diff package.} * * @package WordPress * @subpackage Text_Diff / class Text_Exception extends Exception {} ��Diff/Renderer.php��0000644��00000015226�14732046777�0007722 0��ustar�00��<?php /* * A class to render Diffs in different formats. * * This class renders the diff in classic diff format. It is intended that * this class be customized via inheritance, to obtain fancier outputs. * * Copyright 2004-2010 The Horde Project (http://www.horde.org/) * * See the enclosed file COPYING for license information (LGPL). If you did * not receive this file, see https://opensource.org/license/lgpl-2-1/. * * @package Text_Diff / class Text_Diff_Renderer { /* * Number of leading context "lines" to preserve. * * This should be left at zero for this class, but subclasses may want to * set this to other values. / var $_leading_context_lines = 0; /* * Number of trailing context "lines" to preserve. * * This should be left at zero for this class, but subclasses may want to * set this to other values. / var $_trailing_context_lines = 0; /* * Constructor. / function __construct( $params = array() ) { foreach ($params as $param => $value) { $v = '_' . $param; if (isset($this->$v)) { $this->$v = $value; } } } /* * PHP4 constructor. / public function Text_Diff_Renderer( $params = array() ) { self::__construct( $params ); } /* * Get any renderer parameters. * * @return array All parameters of this renderer object. / function getParams() { $params = array(); foreach (get_object_vars($this) as $k => $v) { if ($k[0] == '_') { $params[substr($k, 1)] = $v; } } return $params; } /* * Renders a diff. * * @param Text_Diff $diff A Text_Diff object. * * @return string The formatted output. / function render($diff) { $xi = $yi = 1; $block = false; $context = array(); $nlead = $this->_leading_context_lines; $ntrail = $this->_trailing_context_lines; $output = $this->_startDiff(); $diffs = $diff->getDiff(); foreach ($diffs as $i => $edit) { / If these are unchanged (copied) lines, and we want to keep * leading or trailing context lines, extract them from the copy * block. / if (is_a($edit, 'Text_Diff_Op_copy')) { / Do we have any diff blocks yet? / if (is_array($block)) { / How many lines to keep as context from the copy * block. / $keep = $i == count($diffs) - 1 ? $ntrail : $nlead + $ntrail; if (count($edit->orig) <= $keep) { / We have less lines in the block than we want for * context => keep the whole block. / $block[] = $edit; } else { if ($ntrail) { / Create a new block with as many lines as we need * for the trailing context. / $context = array_slice($edit->orig, 0, $ntrail); $block[] = new Text_Diff_Op_copy($context); } / @todo / $output .= $this->_block($x0, $ntrail + $xi - $x0, $y0, $ntrail + $yi - $y0, $block); $block = false; } } / Keep the copy block as the context for the next block. / $context = $edit->orig; } else { / Don't we have any diff blocks yet? / if (!is_array($block)) { / Extract context lines from the preceding copy block. / $context = array_slice($context, count($context) - $nlead); $x0 = $xi - count($context); $y0 = $yi - count($context); $block = array(); if ($context) { $block[] = new Text_Diff_Op_copy($context); } } $block[] = $edit; } if ($edit->orig) { $xi += count($edit->orig); } if ($edit->final) { $yi += count($edit->final); } } if (is_array($block)) { $output .= $this->_block($x0, $xi - $x0, $y0, $yi - $y0, $block); } return $output . $this->_endDiff(); } function _block($xbeg, $xlen, $ybeg, $ylen, &$edits) { $output = $this->_startBlock($this->_blockHeader($xbeg, $xlen, $ybeg, $ylen)); foreach ($edits as $edit) { switch (strtolower(get_class($edit))) { case 'text_diff_op_copy': $output .= $this->_context($edit->orig); break; case 'text_diff_op_add': $output .= $this->_added($edit->final); break; case 'text_diff_op_delete': $output .= $this->_deleted($edit->orig); break; case 'text_diff_op_change': $output .= $this->_changed($edit->orig, $edit->final); break; } } return $output . $this->_endBlock(); } function _startDiff() { return ''; } function _endDiff() { return ''; } function _blockHeader($xbeg, $xlen, $ybeg, $ylen) { if ($xlen > 1) { $xbeg .= ',' . ($xbeg + $xlen - 1); } if ($ylen > 1) { $ybeg .= ',' . ($ybeg + $ylen - 1); } // this matches the GNU Diff behaviour if ($xlen && !$ylen) { $ybeg--; } elseif (!$xlen) { $xbeg--; } return $xbeg . ($xlen ? ($ylen ? 'c' : 'd') : 'a') . $ybeg; } function _startBlock($header) { return $header . "\n"; } function _endBlock() { return ''; } function _lines($lines, $prefix = ' ') { return $prefix . implode("\n$prefix", $lines) . "\n"; } function _context($lines) { return $this->_lines($lines, ' '); } function _added($lines) { return $this->_lines($lines, '> '); } function _deleted($lines) { return $this->_lines($lines, '< '); } function _changed($orig, $final) { return $this->_deleted($orig) . "---\n" . $this->_added($final); } } ��Diff/Engine/string.php��0000644��00000020233�14732046777�0010661 0��ustar�00��<?php /* * Parses unified or context diffs output from eg. the diff utility. * * Example: * <code> * $patch = file_get_contents('example.patch'); * $diff = new Text_Diff('string', array($patch)); * $renderer = new Text_Diff_Renderer_inline(); * echo $renderer->render($diff); * </code> * * Copyright 2005 Örjan Persson <o@42mm.org> * Copyright 2005-2010 The Horde Project (http://www.horde.org/) * * See the enclosed file COPYING for license information (LGPL). If you did * not receive this file, see https://opensource.org/license/lgpl-2-1/. * * @author Örjan Persson <o@42mm.org> * @package Text_Diff * @since 0.2.0 / class Text_Diff_Engine_string { /* * Parses a unified or context diff. * * First param contains the whole diff and the second can be used to force * a specific diff type. If the second parameter is 'autodetect', the * diff will be examined to find out which type of diff this is. * * @param string $diff The diff content. * @param string $mode The diff mode of the content in $diff. One of * 'context', 'unified', or 'autodetect'. * * @return array List of all diff operations. / function diff($diff, $mode = 'autodetect') { // Detect line breaks. $lnbr = "\n"; if (strpos($diff, "\r\n") !== false) { $lnbr = "\r\n"; } elseif (strpos($diff, "\r") !== false) { $lnbr = "\r"; } // Make sure we have a line break at the EOF. if (substr($diff, -strlen($lnbr)) != $lnbr) { $diff .= $lnbr; } if ($mode != 'autodetect' && $mode != 'context' && $mode != 'unified') { return PEAR::raiseError('Type of diff is unsupported'); } if ($mode == 'autodetect') { $context = strpos($diff, ''); $unified = strpos($diff, '---'); if ($context === $unified) { return PEAR::raiseError('Type of diff could not be detected'); } elseif ($context === false \|\| $unified === false) { $mode = $context !== false ? 'context' : 'unified'; } else { $mode = $context < $unified ? 'context' : 'unified'; } } // Split by new line and remove the diff header, if there is one. $diff = explode($lnbr, $diff); if (($mode == 'context' && strpos($diff[0], '') === 0) \|\| ($mode == 'unified' && strpos($diff[0], '---') === 0)) { array_shift($diff); array_shift($diff); } if ($mode == 'context') { return $this->parseContextDiff($diff); } else { return $this->parseUnifiedDiff($diff); } } /* * Parses an array containing the unified diff. * * @param array $diff Array of lines. * * @return array List of all diff operations. / function parseUnifiedDiff($diff) { $edits = array(); $end = count($diff) - 1; for ($i = 0; $i < $end;) { $diff1 = array(); switch (substr($diff[$i], 0, 1)) { case ' ': do { $diff1[] = substr($diff[$i], 1); } while (++$i < $end && substr($diff[$i], 0, 1) == ' '); $edits[] = new Text_Diff_Op_copy($diff1); break; case '+': // get all new lines do { $diff1[] = substr($diff[$i], 1); } while (++$i < $end && substr($diff[$i], 0, 1) == '+'); $edits[] = new Text_Diff_Op_add($diff1); break; case '-': // get changed or removed lines $diff2 = array(); do { $diff1[] = substr($diff[$i], 1); } while (++$i < $end && substr($diff[$i], 0, 1) == '-'); while ($i < $end && substr($diff[$i], 0, 1) == '+') { $diff2[] = substr($diff[$i++], 1); } if (count($diff2) == 0) { $edits[] = new Text_Diff_Op_delete($diff1); } else { $edits[] = new Text_Diff_Op_change($diff1, $diff2); } break; default: $i++; break; } } return $edits; } /* * Parses an array containing the context diff. * * @param array $diff Array of lines. * * @return array List of all diff operations. / function parseContextDiff(&$diff) { $edits = array(); $i = $max_i = $j = $max_j = 0; $end = count($diff) - 1; while ($i < $end && $j < $end) { while ($i >= $max_i && $j >= $max_j) { // Find the boundaries of the diff output of the two files for ($i = $j; $i < $end && substr($diff[$i], 0, 3) == ''; $i++); for ($max_i = $i; $max_i < $end && substr($diff[$max_i], 0, 3) != '---'; $max_i++); for ($j = $max_i; $j < $end && substr($diff[$j], 0, 3) == '---'; $j++); for ($max_j = $j; $max_j < $end && substr($diff[$max_j], 0, 3) != ''; $max_j++); } // find what hasn't been changed $array = array(); while ($i < $max_i && $j < $max_j && strcmp($diff[$i], $diff[$j]) == 0) { $array[] = substr($diff[$i], 2); $i++; $j++; } while ($i < $max_i && ($max_j-$j) <= 1) { if ($diff[$i] != '' && substr($diff[$i], 0, 1) != ' ') { break; } $array[] = substr($diff[$i++], 2); } while ($j < $max_j && ($max_i-$i) <= 1) { if ($diff[$j] != '' && substr($diff[$j], 0, 1) != ' ') { break; } $array[] = substr($diff[$j++], 2); } if (count($array) > 0) { $edits[] = new Text_Diff_Op_copy($array); } if ($i < $max_i) { $diff1 = array(); switch (substr($diff[$i], 0, 1)) { case '!': $diff2 = array(); do { $diff1[] = substr($diff[$i], 2); if ($j < $max_j && substr($diff[$j], 0, 1) == '!') { $diff2[] = substr($diff[$j++], 2); } } while (++$i < $max_i && substr($diff[$i], 0, 1) == '!'); $edits[] = new Text_Diff_Op_change($diff1, $diff2); break; case '+': do { $diff1[] = substr($diff[$i], 2); } while (++$i < $max_i && substr($diff[$i], 0, 1) == '+'); $edits[] = new Text_Diff_Op_add($diff1); break; case '-': do { $diff1[] = substr($diff[$i], 2); } while (++$i < $max_i && substr($diff[$i], 0, 1) == '-'); $edits[] = new Text_Diff_Op_delete($diff1); break; } } if ($j < $max_j) { $diff2 = array(); switch (substr($diff[$j], 0, 1)) { case '+': do { $diff2[] = substr($diff[$j++], 2); } while ($j < $max_j && substr($diff[$j], 0, 1) == '+'); $edits[] = new Text_Diff_Op_add($diff2); break; case '-': do { $diff2[] = substr($diff[$j++], 2); } while ($j < $max_j && substr($diff[$j], 0, 1) == '-'); $edits[] = new Text_Diff_Op_delete($diff2); break; } } } return $edits; } } ��Diff/Engine/shell.php��0000644��00000012123�14732046777�0010461 0��ustar�00��<?php /* * Class used internally by Diff to actually compute the diffs. * * This class uses the Unix `diff` program via shell_exec to compute the * differences between the two input arrays. * * Copyright 2007-2010 The Horde Project (http://www.horde.org/) * * See the enclosed file COPYING for license information (LGPL). If you did * not receive this file, see https://opensource.org/license/lgpl-2-1/. * * @author Milian Wolff <mail@milianw.de> * @package Text_Diff * @since 0.3.0 / class Text_Diff_Engine_shell { /* * Path to the diff executable * * @var string / var $_diffCommand = 'diff'; /* * Returns the array of differences. * * @param array $from_lines lines of text from old file * @param array $to_lines lines of text from new file * * @return array all changes made (array with Text_Diff_Op_* objects) / function diff($from_lines, $to_lines) { array_walk($from_lines, array('Text_Diff', 'trimNewlines')); array_walk($to_lines, array('Text_Diff', 'trimNewlines')); $temp_dir = Text_Diff::_getTempDir(); // Execute gnu diff or similar to get a standard diff file. $from_file = tempnam($temp_dir, 'Text_Diff'); $to_file = tempnam($temp_dir, 'Text_Diff'); $fp = fopen($from_file, 'w'); fwrite($fp, implode("\n", $from_lines)); fclose($fp); $fp = fopen($to_file, 'w'); fwrite($fp, implode("\n", $to_lines)); fclose($fp); $diff = shell_exec($this->_diffCommand . ' ' . $from_file . ' ' . $to_file); unlink($from_file); unlink($to_file); if (is_null($diff)) { // No changes were made return array(new Text_Diff_Op_copy($from_lines)); } $from_line_no = 1; $to_line_no = 1; $edits = array(); // Get changed lines by parsing something like: // 0a1,2 // 1,2c4,6 // 1,5d6 preg_match_all('#^(\d+)(?:,(\d+))?([adc])(\d+)(?:,(\d+))?$#m', $diff, $matches, PREG_SET_ORDER); foreach ($matches as $match) { if (!isset($match[5])) { // This paren is not set every time (see regex). $match[5] = false; } if ($match[3] == 'a') { $from_line_no--; } if ($match[3] == 'd') { $to_line_no--; } if ($from_line_no < $match[1] \|\| $to_line_no < $match[4]) { // copied lines assert($match[1] - $from_line_no == $match[4] - $to_line_no); array_push($edits, new Text_Diff_Op_copy( $this->_getLines($from_lines, $from_line_no, $match[1] - 1), $this->_getLines($to_lines, $to_line_no, $match[4] - 1))); } switch ($match[3]) { case 'd': // deleted lines array_push($edits, new Text_Diff_Op_delete( $this->_getLines($from_lines, $from_line_no, $match[2]))); $to_line_no++; break; case 'c': // changed lines array_push($edits, new Text_Diff_Op_change( $this->_getLines($from_lines, $from_line_no, $match[2]), $this->_getLines($to_lines, $to_line_no, $match[5]))); break; case 'a': // added lines array_push($edits, new Text_Diff_Op_add( $this->_getLines($to_lines, $to_line_no, $match[5]))); $from_line_no++; break; } } if (!empty($from_lines)) { // Some lines might still be pending. Add them as copied array_push($edits, new Text_Diff_Op_copy( $this->_getLines($from_lines, $from_line_no, $from_line_no + count($from_lines) - 1), $this->_getLines($to_lines, $to_line_no, $to_line_no + count($to_lines) - 1))); } return $edits; } /* * Get lines from either the old or new text * * @access private * * @param array $text_lines Either $from_lines or $to_lines (passed by reference). * @param int $line_no Current line number (passed by reference). * @param int $end Optional end line, when we want to chop more * than one line. * * @return array The chopped lines / function _getLines(&$text_lines, &$line_no, $end = false) { if (!empty($end)) { $lines = array(); // We can shift even more while ($line_no <= $end) { array_push($lines, array_shift($text_lines)); $line_no++; } } else { $lines = array(array_shift($text_lines)); $line_no++; } return $lines; } } ��Diff/Engine/xdiff.php��0000644��00000004233�14732046777�0010455 0��ustar�00��<?php /* * Class used internally by Diff to actually compute the diffs. * * This class uses the xdiff PECL package (http://pecl.php.net/package/xdiff) * to compute the differences between the two input arrays. * * Copyright 2004-2010 The Horde Project (http://www.horde.org/) * * See the enclosed file COPYING for license information (LGPL). If you did * not receive this file, see https://opensource.org/license/lgpl-2-1/. * * @author Jon Parise <jon@horde.org> * @package Text_Diff / class Text_Diff_Engine_xdiff { /* / function diff($from_lines, $to_lines) { array_walk($from_lines, array('Text_Diff', 'trimNewlines')); array_walk($to_lines, array('Text_Diff', 'trimNewlines')); / Convert the two input arrays into strings for xdiff processing. / $from_string = implode("\n", $from_lines); $to_string = implode("\n", $to_lines); / Diff the two strings and convert the result to an array. / $diff = xdiff_string_diff($from_string, $to_string, count($to_lines)); $diff = explode("\n", $diff); / Walk through the diff one line at a time. We build the $edits * array of diff operations by reading the first character of the * xdiff output (which is in the "unified diff" format). * * Note that we don't have enough information to detect "changed" * lines using this approach, so we can't add Text_Diff_Op_changed * instances to the $edits array. The result is still perfectly * valid, albeit a little less descriptive and efficient. / $edits = array(); foreach ($diff as $line) { if (!strlen($line)) { continue; } switch ($line[0]) { case ' ': $edits[] = new Text_Diff_Op_copy(array(substr($line, 1))); break; case '+': $edits[] = new Text_Diff_Op_add(array(substr($line, 1))); break; case '-': $edits[] = new Text_Diff_Op_delete(array(substr($line, 1))); break; } } return $edits; } } ��Diff/Engine/native.php��0000644��00000037261�14732046777�0010652 0��ustar�00��<?php /* * 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: * https://cpan.metacpan.org/authors/id/N/NE/NEDKONZ/Algorithm-Diff-1.06.zip * * 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: * ftp://gnudist.gnu.org/pub/gnu/diffutils/diffutils-2.7.tar.gz * * Some ideas (subdivision by NCHUNKS > 2, and some optimizations) are from * 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 2004-2010 The Horde Project (http://www.horde.org/) * * See the enclosed file COPYING for license information (LGPL). If you did * not receive this file, see https://opensource.org/license/lgpl-2-1/. * * @author Geoffrey T. Dairiki <dairiki@dairiki.org> * @package Text_Diff / class Text_Diff_Engine_native { public $xchanged; public $ychanged; public $xv; public $yv; public $xind; public $yind; public $seq; public $in_seq; public $lcs; function diff($from_lines, $to_lines) { array_walk($from_lines, array('Text_Diff', 'trimNewlines')); array_walk($to_lines, array('Text_Diff', 'trimNewlines')); $n_from = count($from_lines); $n_to = count($to_lines); $this->xchanged = $this->ychanged = array(); $this->xv = $this->yv = array(); $this->xind = $this->yind = array(); unset($this->seq); unset($this->in_seq); unset($this->lcs); // Skip leading common lines. for ($skip = 0; $skip < $n_from && $skip < $n_to; $skip++) { if ($from_lines[$skip] !== $to_lines[$skip]) { break; } $this->xchanged[$skip] = $this->ychanged[$skip] = false; } // Skip trailing common lines. $xi = $n_from; $yi = $n_to; for ($endskip = 0; --$xi > $skip && --$yi > $skip; $endskip++) { if ($from_lines[$xi] !== $to_lines[$yi]) { break; } $this->xchanged[$xi] = $this->ychanged[$yi] = false; } // Ignore lines which do not exist in both files. for ($xi = $skip; $xi < $n_from - $endskip; $xi++) { $xhash[$from_lines[$xi]] = 1; } for ($yi = $skip; $yi < $n_to - $endskip; $yi++) { $line = $to_lines[$yi]; if (($this->ychanged[$yi] = empty($xhash[$line]))) { continue; } $yhash[$line] = 1; $this->yv[] = $line; $this->yind[] = $yi; } for ($xi = $skip; $xi < $n_from - $endskip; $xi++) { $line = $from_lines[$xi]; if (($this->xchanged[$xi] = empty($yhash[$line]))) { continue; } $this->xv[] = $line; $this->xind[] = $xi; } // Find the LCS. $this->_compareseq(0, count($this->xv), 0, count($this->yv)); // Merge edits when possible. $this->_shiftBoundaries($from_lines, $this->xchanged, $this->ychanged); $this->_shiftBoundaries($to_lines, $this->ychanged, $this->xchanged); // Compute the edit operations. $edits = array(); $xi = $yi = 0; while ($xi < $n_from \|\| $yi < $n_to) { assert($yi < $n_to \|\| $this->xchanged[$xi]); assert($xi < $n_from \|\| $this->ychanged[$yi]); // Skip matching "snake". $copy = array(); while ($xi < $n_from && $yi < $n_to && !$this->xchanged[$xi] && !$this->ychanged[$yi]) { $copy[] = $from_lines[$xi++]; ++$yi; } if ($copy) { $edits[] = new Text_Diff_Op_copy($copy); } // Find deletes & adds. $delete = array(); while ($xi < $n_from && $this->xchanged[$xi]) { $delete[] = $from_lines[$xi++]; } $add = array(); while ($yi < $n_to && $this->ychanged[$yi]) { $add[] = $to_lines[$yi++]; } if ($delete && $add) { $edits[] = new Text_Diff_Op_change($delete, $add); } elseif ($delete) { $edits[] = new Text_Diff_Op_delete($delete); } elseif ($add) { $edits[] = new Text_Diff_Op_add($add); } } return $edits; } /* * Divides the Largest Common Subsequence (LCS) of the sequences (XOFF, * XLIM) and (YOFF, YLIM) into NCHUNKS approximately equally sized * segments. * * Returns (LCS, PTS). LCS is the length of the LCS. PTS is an array of * NCHUNKS+1 (X, Y) indexes giving the diving points between sub * sequences. The first sub-sequence is contained in (X0, X1), (Y0, Y1), * the second in (X1, X2), (Y1, Y2) and so on. Note that (X0, Y0) == * (XOFF, YOFF) and (X[NCHUNKS], Y[NCHUNKS]) == (XLIM, YLIM). * * This function assumes that the first lines of the specified portions of * the two files do not match, and likewise that the last lines do not * match. The caller must trim matching lines from the beginning and end * of the portions it is going to specify. / function _diag ($xoff, $xlim, $yoff, $ylim, $nchunks) { $flip = false; if ($xlim - $xoff > $ylim - $yoff) { / Things seems faster (I'm not sure I understand why) when the * shortest sequence is in X. / $flip = true; list ($xoff, $xlim, $yoff, $ylim) = array($yoff, $ylim, $xoff, $xlim); } if ($flip) { for ($i = $ylim - 1; $i >= $yoff; $i--) { $ymatches[$this->xv[$i]][] = $i; } } else { for ($i = $ylim - 1; $i >= $yoff; $i--) { $ymatches[$this->yv[$i]][] = $i; } } $this->lcs = 0; $this->seq[0]= $yoff - 1; $this->in_seq = array(); $ymids[0] = array(); $numer = $xlim - $xoff + $nchunks - 1; $x = $xoff; for ($chunk = 0; $chunk < $nchunks; $chunk++) { if ($chunk > 0) { for ($i = 0; $i <= $this->lcs; $i++) { $ymids[$i][$chunk - 1] = $this->seq[$i]; } } $x1 = $xoff + (int)(($numer + ($xlim - $xoff) $chunk) / $nchunks); for (; $x < $x1; $x++) { $line = $flip ? $this->yv[$x] : $this->xv[$x]; if (empty($ymatches[$line])) { continue; } $matches = $ymatches[$line]; reset($matches); while ($y = current($matches)) { if (empty($this->in_seq[$y])) { $k = $this->_lcsPos($y); assert($k > 0); $ymids[$k] = $ymids[$k - 1]; break; } next($matches); } while ($y = current($matches)) { if ($y > $this->seq[$k - 1]) { assert($y <= $this->seq[$k]); /* Optimization: this is a common case: next match is * just replacing previous match. / $this->in_seq[$this->seq[$k]] = false; $this->seq[$k] = $y; $this->in_seq[$y] = 1; } elseif (empty($this->in_seq[$y])) { $k = $this->_lcsPos($y); assert($k > 0); $ymids[$k] = $ymids[$k - 1]; } next($matches); } } } $seps[] = $flip ? array($yoff, $xoff) : array($xoff, $yoff); $ymid = $ymids[$this->lcs]; for ($n = 0; $n < $nchunks - 1; $n++) { $x1 = $xoff + (int)(($numer + ($xlim - $xoff) $n) / $nchunks); $y1 = $ymid[$n] + 1; $seps[] = $flip ? array($y1, $x1) : array($x1, $y1); } $seps[] = $flip ? array($ylim, $xlim) : array($xlim, $ylim); return array($this->lcs, $seps); } function _lcsPos($ypos) { $end = $this->lcs; if ($end == 0 \|\| $ypos > $this->seq[$end]) { $this->seq[++$this->lcs] = $ypos; $this->in_seq[$ypos] = 1; return $this->lcs; } $beg = 1; while ($beg < $end) { $mid = (int)(($beg + $end) / 2); if ($ypos > $this->seq[$mid]) { $beg = $mid + 1; } else { $end = $mid; } } assert($ypos != $this->seq[$end]); $this->in_seq[$this->seq[$end]] = false; $this->seq[$end] = $ypos; $this->in_seq[$ypos] = 1; return $end; } /** * Finds LCS of two sequences. * * The results are recorded in the vectors $this->{x,y}changed[], by * storing a 1 in the element for each line that is an insertion or * deletion (ie. is not in the LCS). * * The subsequence of file 0 is (XOFF, XLIM) and likewise for file 1. * * Note that XLIM, YLIM are exclusive bounds. All line numbers are * origin-0 and discarded lines are not counted. / function _compareseq ($xoff, $xlim, $yoff, $ylim) { / Slide down the bottom initial diagonal. / while ($xoff < $xlim && $yoff < $ylim && $this->xv[$xoff] == $this->yv[$yoff]) { ++$xoff; ++$yoff; } / Slide up the top initial diagonal. / while ($xlim > $xoff && $ylim > $yoff && $this->xv[$xlim - 1] == $this->yv[$ylim - 1]) { --$xlim; --$ylim; } if ($xoff == $xlim \|\| $yoff == $ylim) { $lcs = 0; } else { / This is ad hoc but seems to work well. $nchunks = * sqrt(min($xlim - $xoff, $ylim - $yoff) / 2.5); $nchunks = * max(2,min(8,(int)$nchunks)); / $nchunks = min(7, $xlim - $xoff, $ylim - $yoff) + 1; list($lcs, $seps) = $this->_diag($xoff, $xlim, $yoff, $ylim, $nchunks); } if ($lcs == 0) { / X and Y sequences have no common subsequence: mark all * changed. / while ($yoff < $ylim) { $this->ychanged[$this->yind[$yoff++]] = 1; } while ($xoff < $xlim) { $this->xchanged[$this->xind[$xoff++]] = 1; } } else { / Use the partitions to split this problem into subproblems. / reset($seps); $pt1 = $seps[0]; while ($pt2 = next($seps)) { $this->_compareseq ($pt1[0], $pt2[0], $pt1[1], $pt2[1]); $pt1 = $pt2; } } } /* * Adjusts inserts/deletes of identical lines to join changes as much as * possible. * * We do something when a run of changed lines include a line at one end * and has an excluded, identical line at the other. We are free to * choose which identical line is included. `compareseq' usually chooses * the one at the beginning, but usually it is cleaner to consider the * following identical line to be the "change". * * This is extracted verbatim from analyze.c (GNU diffutils-2.7). / function _shiftBoundaries($lines, &$changed, $other_changed) { $i = 0; $j = 0; assert(count($lines) == count($changed)); $len = count($lines); $other_len = count($other_changed); while (1) { / Scan forward to find the beginning of another run of * changes. Also keep track of the corresponding point in the * other file. * * Throughout this code, $i and $j are adjusted together so that * the first $i elements of $changed and the first $j elements of * $other_changed both contain the same number of zeros (unchanged * lines). * * Furthermore, $j is always kept so that $j == $other_len or * $other_changed[$j] == false. / while ($j < $other_len && $other_changed[$j]) { $j++; } while ($i < $len && ! $changed[$i]) { assert($j < $other_len && ! $other_changed[$j]); $i++; $j++; while ($j < $other_len && $other_changed[$j]) { $j++; } } if ($i == $len) { break; } $start = $i; / Find the end of this run of changes. / while (++$i < $len && $changed[$i]) { continue; } do { / Record the length of this run of changes, so that we can * later determine whether the run has grown. / $runlength = $i - $start; / Move the changed region back, so long as the previous * unchanged line matches the last changed one. This merges * with previous changed regions. / while ($start > 0 && $lines[$start - 1] == $lines[$i - 1]) { $changed[--$start] = 1; $changed[--$i] = false; while ($start > 0 && $changed[$start - 1]) { $start--; } assert($j > 0); while ($other_changed[--$j]) { continue; } assert($j >= 0 && !$other_changed[$j]); } / Set CORRESPONDING to the end of the changed run, at the * last point where it corresponds to a changed run in the * other file. CORRESPONDING == LEN means no such point has * been found. / $corresponding = $j < $other_len ? $i : $len; / Move the changed region forward, so long as the first * changed line matches the following unchanged one. This * merges with following changed regions. Do this second, so * that if there are no merges, the changed region is moved * forward as far as possible. / while ($i < $len && $lines[$start] == $lines[$i]) { $changed[$start++] = false; $changed[$i++] = 1; while ($i < $len && $changed[$i]) { $i++; } assert($j < $other_len && ! $other_changed[$j]); $j++; if ($j < $other_len && $other_changed[$j]) { $corresponding = $i; while ($j < $other_len && $other_changed[$j]) { $j++; } } } } while ($runlength != $i - $start); / If possible, move the fully-merged run of changes back to a * corresponding run in the other file. / while ($corresponding < $i) { $changed[--$start] = 1; $changed[--$i] = 0; assert($j > 0); while ($other_changed[--$j]) { continue; } assert($j >= 0 && !$other_changed[$j]); } } } } ��Diff/Renderer/inline.php��0000644��00000012630�14732046777�0011174 0��ustar�00��<?php /* * "Inline" diff renderer. * * Copyright 2004-2010 The Horde Project (http://www.horde.org/) * * See the enclosed file COPYING for license information (LGPL). If you did * not receive this file, see https://opensource.org/license/lgpl-2-1/. * * @author Ciprian Popovici * @package Text_Diff / /* Text_Diff_Renderer / // WP #7391 require_once dirname(dirname(__FILE__)) . '/Renderer.php'; /* * "Inline" diff renderer. * * This class renders diffs in the Wiki-style "inline" format. * * @author Ciprian Popovici * @package Text_Diff / class Text_Diff_Renderer_inline extends Text_Diff_Renderer { /* * Number of leading context "lines" to preserve. * * @var integer / var $_leading_context_lines = 10000; /* * Number of trailing context "lines" to preserve. * * @var integer / var $_trailing_context_lines = 10000; /* * Prefix for inserted text. * * @var string / var $_ins_prefix = '<ins>'; /* * Suffix for inserted text. * * @var string / var $_ins_suffix = '</ins>'; /* * Prefix for deleted text. * * @var string / var $_del_prefix = '<del>'; /* * Suffix for deleted text. * * @var string / var $_del_suffix = '</del>'; /* * Header for each change block. * * @var string / var $_block_header = ''; /* * Whether to split down to character-level. * * @var boolean / var $_split_characters = false; /* * What are we currently splitting on? Used to recurse to show word-level * or character-level changes. * * @var string / var $_split_level = 'lines'; function _blockHeader($xbeg, $xlen, $ybeg, $ylen) { return $this->_block_header; } function _startBlock($header) { return $header; } function _lines($lines, $prefix = ' ', $encode = true) { if ($encode) { array_walk($lines, array(&$this, '_encode')); } if ($this->_split_level == 'lines') { return implode("\n", $lines) . "\n"; } else { return implode('', $lines); } } function _added($lines) { array_walk($lines, array(&$this, '_encode')); $lines[0] = $this->_ins_prefix . $lines[0]; $lines[count($lines) - 1] .= $this->_ins_suffix; return $this->_lines($lines, ' ', false); } function _deleted($lines, $words = false) { array_walk($lines, array(&$this, '_encode')); $lines[0] = $this->_del_prefix . $lines[0]; $lines[count($lines) - 1] .= $this->_del_suffix; return $this->_lines($lines, ' ', false); } function _changed($orig, $final) { / If we've already split on characters, just display. / if ($this->_split_level == 'characters') { return $this->_deleted($orig) . $this->_added($final); } / If we've already split on words, just display. / if ($this->_split_level == 'words') { $prefix = ''; while ($orig[0] !== false && $final[0] !== false && substr($orig[0], 0, 1) == ' ' && substr($final[0], 0, 1) == ' ') { $prefix .= substr($orig[0], 0, 1); $orig[0] = substr($orig[0], 1); $final[0] = substr($final[0], 1); } return $prefix . $this->_deleted($orig) . $this->_added($final); } $text1 = implode("\n", $orig); $text2 = implode("\n", $final); / Non-printing newline marker. / $nl = "\0"; if ($this->_split_characters) { $diff = new Text_Diff('native', array(preg_split('//', $text1), preg_split('//', $text2))); } else { / We want to split on word boundaries, but we need to preserve * whitespace as well. Therefore we split on words, but include * all blocks of whitespace in the wordlist. / $diff = new Text_Diff('native', array($this->_splitOnWords($text1, $nl), $this->_splitOnWords($text2, $nl))); } / Get the diff in inline format. / $renderer = new Text_Diff_Renderer_inline (array_merge($this->getParams(), array('split_level' => $this->_split_characters ? 'characters' : 'words'))); / Run the diff and get the output. / return str_replace($nl, "\n", $renderer->render($diff)) . "\n"; } function _splitOnWords($string, $newlineEscape = "\n") { // Ignore \0; otherwise the while loop will never finish. $string = str_replace("\0", '', $string); $words = array(); $length = strlen($string); $pos = 0; while ($pos < $length) { // Eat a word with any preceding whitespace. $spaces = strspn(substr($string, $pos), " \n"); $nextpos = strcspn(substr($string, $pos + $spaces), " \n"); $words[] = str_replace("\n", $newlineEscape, substr($string, $pos, $spaces + $nextpos)); $pos += $spaces + $nextpos; } return $words; } function _encode(&$string) { $string = htmlspecialchars($string); } } ��Diff.php��0000644��00000031107�14732046777�0006150 0��ustar�00��<?php /* * General API for generating and formatting diffs - the differences between * two sequences of strings. * * The original PHP version of this code was written by Geoffrey T. Dairiki * <dairiki@dairiki.org>, and is used/adapted with his permission. * * Copyright 2004 Geoffrey T. Dairiki <dairiki@dairiki.org> * Copyright 2004-2010 The Horde Project (http://www.horde.org/) * * See the enclosed file COPYING for license information (LGPL). If you did * not receive this file, see https://opensource.org/license/lgpl-2-1/. * * @package Text_Diff * @author Geoffrey T. Dairiki <dairiki@dairiki.org> / class Text_Diff { /* * Array of changes. * * @var array / var $_edits; /* * Computes diffs between sequences of strings. * * @param string $engine Name of the diffing engine to use. 'auto' * will automatically select the best. * @param array $params Parameters to pass to the diffing engine. * Normally an array of two arrays, each * containing the lines from a file. / function __construct( $engine, $params ) { // Backward compatibility workaround. if (!is_string($engine)) { $params = array($engine, $params); $engine = 'auto'; } if ($engine == 'auto') { $engine = extension_loaded('xdiff') ? 'xdiff' : 'native'; } else { $engine = basename($engine); } // WP #7391 require_once dirname(__FILE__).'/Diff/Engine/' . $engine . '.php'; $class = 'Text_Diff_Engine_' . $engine; $diff_engine = new $class(); $this->_edits = call_user_func_array(array($diff_engine, 'diff'), $params); } /* * PHP4 constructor. / public function Text_Diff( $engine, $params ) { self::__construct( $engine, $params ); } /* * Returns the array of differences. / function getDiff() { return $this->_edits; } /* * returns the number of new (added) lines in a given diff. * * @since Text_Diff 1.1.0 * * @return int The number of new lines / function countAddedLines() { $count = 0; foreach ($this->_edits as $edit) { if (is_a($edit, 'Text_Diff_Op_add') \|\| is_a($edit, 'Text_Diff_Op_change')) { $count += $edit->nfinal(); } } return $count; } /* * Returns the number of deleted (removed) lines in a given diff. * * @since Text_Diff 1.1.0 * * @return int The number of deleted lines / function countDeletedLines() { $count = 0; foreach ($this->_edits as $edit) { if (is_a($edit, 'Text_Diff_Op_delete') \|\| is_a($edit, 'Text_Diff_Op_change')) { $count += $edit->norig(); } } return $count; } /* * Computes a reversed diff. * * Example: * <code> * $diff = new Text_Diff($lines1, $lines2); * $rev = $diff->reverse(); * </code> * * @return Text_Diff A Diff object representing the inverse of the * original diff. Note that we purposely don't return a * reference here, since this essentially is a clone() * method. / function reverse() { if (version_compare(zend_version(), '2', '>')) { $rev = clone($this); } else { $rev = $this; } $rev->_edits = array(); foreach ($this->_edits as $edit) { $rev->_edits[] = $edit->reverse(); } return $rev; } /* * Checks for an empty diff. * * @return bool True if two sequences were identical. / function isEmpty() { foreach ($this->_edits as $edit) { if (!is_a($edit, 'Text_Diff_Op_copy')) { return false; } } return true; } /* * Computes the length of the Longest Common Subsequence (LCS). * * This is mostly for diagnostic purposes. * * @return int The length of the LCS. / function lcs() { $lcs = 0; foreach ($this->_edits as $edit) { if (is_a($edit, 'Text_Diff_Op_copy')) { $lcs += count($edit->orig); } } return $lcs; } /* * Gets the original set of lines. * * This reconstructs the $from_lines parameter passed to the constructor. * * @return array The original sequence of strings. / function getOriginal() { $lines = array(); foreach ($this->_edits as $edit) { if ($edit->orig) { array_splice($lines, count($lines), 0, $edit->orig); } } return $lines; } /* * Gets the final set of lines. * * This reconstructs the $to_lines parameter passed to the constructor. * * @return array The sequence of strings. / function getFinal() { $lines = array(); foreach ($this->_edits as $edit) { if ($edit->final) { array_splice($lines, count($lines), 0, $edit->final); } } return $lines; } /* * Removes trailing newlines from a line of text. This is meant to be used * with array_walk(). * * @param string $line The line to trim. * @param int $key The index of the line in the array. Not used. / static function trimNewlines(&$line, $key) { $line = str_replace(array("\n", "\r"), '', $line); } /* * Determines the location of the system temporary directory. * * @access protected * * @return string A directory name which can be used for temp files. * Returns false if one could not be found. / static function _getTempDir() { $tmp_locations = array('/tmp', '/var/tmp', 'c:\WUTemp', 'c:\temp', 'c:\windows\temp', 'c:\winnt\temp'); / Try PHP's upload_tmp_dir directive. / $tmp = ini_get('upload_tmp_dir'); / Otherwise, try to determine the TMPDIR environment variable. / if (!strlen($tmp)) { $tmp = getenv('TMPDIR'); } / If we still cannot determine a value, then cycle through a list of * preset possibilities. / while (!strlen($tmp) && count($tmp_locations)) { $tmp_check = array_shift($tmp_locations); if (@is_dir($tmp_check)) { $tmp = $tmp_check; } } / If it is still empty, we have failed, so return false; otherwise * return the directory determined. / return strlen($tmp) ? $tmp : false; } /* * Checks a diff for validity. * * This is here only for debugging purposes. / function _check($from_lines, $to_lines) { if (serialize($from_lines) != serialize($this->getOriginal())) { throw new Text_Exception("Reconstructed original does not match"); } if (serialize($to_lines) != serialize($this->getFinal())) { throw new Text_Exception("Reconstructed final does not match"); } $rev = $this->reverse(); if (serialize($to_lines) != serialize($rev->getOriginal())) { throw new Text_Exception("Reversed original does not match"); } if (serialize($from_lines) != serialize($rev->getFinal())) { throw new Text_Exception("Reversed final does not match"); } $prevtype = null; foreach ($this->_edits as $edit) { if ($prevtype !== null && $edit instanceof $prevtype) { throw new Text_Exception("Edit sequence is non-optimal"); } $prevtype = get_class($edit); } return true; } } /* * @package Text_Diff * @author Geoffrey T. Dairiki <dairiki@dairiki.org> / class Text_MappedDiff extends Text_Diff { /* * Computes a diff between sequences of strings. * * This can be used to compute things like case-insensitive diffs, or diffs * which ignore changes in white-space. * * @param array $from_lines An array of strings. * @param array $to_lines An array of strings. * @param array $mapped_from_lines This array should have the same size * number of elements as $from_lines. The * elements in $mapped_from_lines and * $mapped_to_lines are what is actually * compared when computing the diff. * @param array $mapped_to_lines This array should have the same number * of elements as $to_lines. / function __construct($from_lines, $to_lines, $mapped_from_lines, $mapped_to_lines) { assert(count($from_lines) == count($mapped_from_lines)); assert(count($to_lines) == count($mapped_to_lines)); parent::Text_Diff($mapped_from_lines, $mapped_to_lines); $xi = $yi = 0; for ($i = 0; $i < count($this->_edits); $i++) { $orig = &$this->_edits[$i]->orig; if (is_array($orig)) { $orig = array_slice($from_lines, $xi, count($orig)); $xi += count($orig); } $final = &$this->_edits[$i]->final; if (is_array($final)) { $final = array_slice($to_lines, $yi, count($final)); $yi += count($final); } } } /* * PHP4 constructor. / public function Text_MappedDiff( $from_lines, $to_lines, $mapped_from_lines, $mapped_to_lines ) { self::__construct( $from_lines, $to_lines, $mapped_from_lines, $mapped_to_lines ); } } /* * @package Text_Diff * @author Geoffrey T. Dairiki <dairiki@dairiki.org> * * @access private / abstract class Text_Diff_Op { var $orig; var $final; abstract function &reverse(); function norig() { return $this->orig ? count($this->orig) : 0; } function nfinal() { return $this->final ? count($this->final) : 0; } } /* * @package Text_Diff * @author Geoffrey T. Dairiki <dairiki@dairiki.org> * * @access private / class Text_Diff_Op_copy extends Text_Diff_Op { /* * PHP5 constructor. / function __construct( $orig, $final = false ) { if (!is_array($final)) { $final = $orig; } $this->orig = $orig; $this->final = $final; } /* * PHP4 constructor. / public function Text_Diff_Op_copy( $orig, $final = false ) { self::__construct( $orig, $final ); } function &reverse() { $reverse = new Text_Diff_Op_copy($this->final, $this->orig); return $reverse; } } /* * @package Text_Diff * @author Geoffrey T. Dairiki <dairiki@dairiki.org> * * @access private / class Text_Diff_Op_delete extends Text_Diff_Op { /* * PHP5 constructor. / function __construct( $lines ) { $this->orig = $lines; $this->final = false; } /* * PHP4 constructor. / public function Text_Diff_Op_delete( $lines ) { self::__construct( $lines ); } function &reverse() { $reverse = new Text_Diff_Op_add($this->orig); return $reverse; } } /* * @package Text_Diff * @author Geoffrey T. Dairiki <dairiki@dairiki.org> * * @access private / class Text_Diff_Op_add extends Text_Diff_Op { /* * PHP5 constructor. / function __construct( $lines ) { $this->final = $lines; $this->orig = false; } /* * PHP4 constructor. / public function Text_Diff_Op_add( $lines ) { self::__construct( $lines ); } function &reverse() { $reverse = new Text_Diff_Op_delete($this->final); return $reverse; } } /* * @package Text_Diff * @author Geoffrey T. Dairiki <dairiki@dairiki.org> * * @access private / class Text_Diff_Op_change extends Text_Diff_Op { /* * PHP5 constructor. / function __construct( $orig, $final ) { $this->orig = $orig; $this->final = $final; } /* * PHP4 constructor. */ public function Text_Diff_Op_change( $orig, $final ) { self::__construct( $orig, $final ); } function &reverse() { $reverse = new Text_Diff_Op_change($this->final, $this->orig); return $reverse; } } ��

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