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Neo committed 2025-12-19 00:21:15 -08:00
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upload/ips_kernel/PEAR/Text/Diff.php
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<?php
/**
* Text_Diff
*
* General API for generating and formatting diffs - the differences between
* two sequences of strings.
*
* The PHP diff code used in this package was originally written by Geoffrey
* T. Dairiki and is used with his permission.
*
* $Horde: framework/Text_Diff/Diff.php,v 1.10 2004/11/01 11:51:15 mdjukic Exp $
*
* @package Text_Diff
* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
*/
class Text_Diff {
/**
* Array of changes.
*
* @var array $_edits
*/
var $_edits;
/**
* Computes diffs between sequences of strings.
*
* @param array $from_lines An array of strings. Typically these are
* lines from a file.
* @param array $to_lines An array of strings.
*/
function Text_Diff($from_lines, $to_lines)
{
array_walk($from_lines, array($this, '_trimNewlines'));
array_walk($to_lines, array($this, '_trimNewlines'));
if (extension_loaded('xdiff')) {
$engine = &new Text_Diff_Engine_xdiff();
} else {
$engine = &new Text_Diff_Engine_native();
}
$this->_edits = $engine->diff($from_lines, $to_lines);
}
/**
* Returns the array of differences.
*/
function getDiff()
{
return $this->_edits;
}
/**
* 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', '>')) {
$rev = clone($obj);
} else {
$rev = $this;
}
$rev->_edits = array();
foreach ($this->_edits as $edit) {
$rev->_edits[] = $edit->reverse();
}
return $rev;
}
/**
* Checks for an empty diff.
*
* @return boolean True if two sequences were identical.
*/
function isEmpty()
{
foreach ($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 purposed.
*
* @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 integer $key The index of the line in the array. Not used.
*/
function _trimNewlines(&$line, $key)
{
$line = str_replace(array("\n", "\r"), '', $line);
}
/**
* Checks a diff for validity.
*
* This is here only for debugging purposes.
*/
function _check($from_lines, $to_lines)
{
if (serialize($from_lines) != serialize($this->getOriginal())) {
trigger_error("Reconstructed original doesn't match", E_USER_ERROR);
}
if (serialize($to_lines) != serialize($this->getFinal())) {
trigger_error("Reconstructed final doesn't match", E_USER_ERROR);
}
$rev = $this->reverse();
if (serialize($to_lines) != serialize($rev->getOriginal())) {
trigger_error("Reversed original doesn't match", E_USER_ERROR);
}
if (serialize($from_lines) != serialize($rev->getFinal())) {
trigger_error("Reversed final doesn't match", E_USER_ERROR);
}
$prevtype = null;
foreach ($this->_edits as $edit) {
if ($prevtype == get_class($edit)) {
trigger_error("Edit sequence is non-optimal", E_USER_ERROR);
}
$prevtype = get_class($edit);
}
return true;
}
}
/**
* $Horde: framework/Text_Diff/Diff.php,v 1.10 2004/11/01 11:51:15 mdjukic Exp $
*
* @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-insensitve 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 $to_lines.
*/
function Text_MappedDiff($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);
}
}
}
}
/**
* 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.
*
* @author Jon Parise <jon@horde.org>
* @package Text_Diff
* @access private
*/
class Text_Diff_Engine_xdiff {
function diff($from_lines, $to_lines)
{
/* 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 $line) {
switch ($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 $edits;
}
}
/**
* Class used internally by Diff to actually compute the diffs. This class is
* implemented using native PHP code.
*
* The algorithm used here is mostly lifted from the perl module
* Algorithm::Diff (version 1.06) by Ned Konz, which is available at:
* http://www.perl.com/CPAN/authors/id/N/NE/NEDKONZ/Algorithm-Diff-1.06.zip
*
* More ideas are taken from:
* http://www.ics.uci.edu/~eppstein/161/960229.html
*
* Some ideas (and a bit of code) are from from analyze.c, from GNU
* diffutils-2.7, which can be found at:
* ftp://gnudist.gnu.org/pub/gnu/diffutils/diffutils-2.7.tar.gz
*
* Some ideas (subdivision by NCHUNKS > 2, and some optimizations) are from
* Geoffrey T. Dairiki <dairiki@dairiki.org>. The original PHP version of this
* code was written by him, and is used/adapted with his permission.
*
* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
* @package Text_Diff
* @access private
*/
class Text_Diff_Engine_native {
function diff($from_lines, $to_lines)
{
$n_from = count($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];
foreach ($matches as $y) {
if (empty($this->in_seq[$y])) {
$k = $this->_lcsPos($y);
assert($k > 0);
$ymids[$k] = $ymids[$k - 1];
break;
}
}
while (list($junk, $y) = each($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];
}
}
}
}
$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]');
}
}
}
}
/**
* @package Text_Diff
* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
* @access private
*/
class Text_Diff_Op {
var $orig;
var $final;
function reverse()
{
trigger_error('Abstract method', E_USER_ERROR);
}
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 {
function Text_Diff_Op_copy($orig, $final = false)
{
if (!is_array($final)) {
$final = $orig;
}
$this->orig = $orig;
$this->final = $final;
}
function &reverse()
{
return $reverse = &new Text_Diff_Op_copy($this->final, $this->orig);
}
}
/**
* @package Text_Diff
* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
* @access private
*/
class Text_Diff_Op_delete extends Text_Diff_Op {
function Text_Diff_Op_delete($lines)
{
$this->orig = $lines;
$this->final = false;
}
function &reverse()
{
return $reverse = &new Text_Diff_Op_add($this->orig);
}
}
/**
* @package Text_Diff
* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
* @access private
*/
class Text_Diff_Op_add extends Text_Diff_Op {
function Text_Diff_Op_add($lines)
{
$this->final = $lines;
$this->orig = false;
}
function &reverse()
{
return $reverse = &new Text_Diff_Op_delete($this->final);
}
}
/**
* @package Text_Diff
* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
* @access private
*/
class Text_Diff_Op_change extends Text_Diff_Op {
function Text_Diff_Op_change($orig, $final)
{
$this->orig = $orig;
$this->final = $final;
}
function &reverse()
{
return $reverse = &new Text_Diff_Op_change($this->final, $this->orig);
}
}
upload/ips_kernel/PEAR/Text/Diff/Renderer.php
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<?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.
*
* $Horde: framework/Text_Diff/Diff/Renderer.php,v 1.8 2005/05/02 19:44:53 chuck Exp $
*
* @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 $_trailing_context_lines = 0;
/**
* Constructor.
*/
function Text_Diff_Renderer($params = array())
{
foreach ($params as $param => $value) {
$v = '_' . $param;
if (isset($this->$v)) {
$this->$v = $value;
}
}
}
/**
* Get any renderer parameters.
*
* @return array All parameters of this renderer object.
*/
function getParams()
{
return get_object_vars($this);
}
/**
* 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 = $this->_startDiff();
foreach ($diff->getDiff() as $edit) {
if (is_a($edit, 'Text_Diff_Op_copy')) {
if (is_array($block)) {
if (count($edit->orig) <= $nlead + $ntrail) {
$block[] = $edit;
} else {
if ($ntrail) {
$context = array_slice($edit->orig, 0, $ntrail);
$block[] = &new Text_Diff_Op_copy($context);
}
$output .= $this->_block($x0, $ntrail + $xi - $x0,
$y0, $ntrail + $yi - $y0,
$block);
$block = false;
}
}
$context = $edit->orig;
} else {
if (!is_array($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);
}
return $xbeg . ($xlen ? ($ylen ? 'c' : 'd') : 'a') . $ybeg;
}
function _startBlock($header)
{
return $header . "\n";
}
function _endBlock()
{
return '';
}
/**
* Added by Matt Mecham
* Space between prefix and string result
* 25-07-2005
*
*/
function _lines($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);
}
}
upload/ips_kernel/PEAR/Text/Diff/Renderer/inline.php
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<?php
/**
* "Inline" diff renderer.
*
* This class renders diffs in the Wiki-style "inline" format.
*
* $Horde: framework/Text_Diff/Diff/Renderer/inline.php,v 1.11 2005/05/02 19:49:39 chuck Exp $
*
* @author Ciprian Popovici
* @package Text_Diff
*/
class Text_Diff_Renderer_inline extends Text_Diff_Renderer {
/**
* Number of leading context "lines" to preserve.
*/
var $_leading_context_lines = 10000;
/**
* Number of trailing context "lines" to preserve.
*/
var $_trailing_context_lines = 10000;
/**
* Prefix for inserted text.
*/
var $_ins_prefix = '<ins>';
/**
* Suffix for inserted text.
*/
var $_ins_suffix = '</ins>';
/**
* Prefix for deleted text.
*/
var $_del_prefix = '<del>';
/**
* Suffix for deleted text.
*/
var $_del_suffix = '</del>';
/**
* Header for each change block.
*/
var $_block_header = '';
/**
* What are we currently splitting on? Used to recurse to show word-level
* changes.
*/
var $_split_level = 'lines';
function _lines($lines, $prefix = ' ')
{
if ($this->_split_level == 'words') {
return implode('', $lines);
} else {
return implode("\n", $lines) . "\n";
}
}
function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
{
return $this->_block_header;
}
function _startBlock($header)
{
return $header;
}
function _added($lines)
{
$lines[0] = $this->_ins_prefix . $lines[0];
$lines[count($lines) - 1] .= $this->_ins_suffix;
return $this->_lines($lines);
}
function _deleted($lines, $words = false)
{
$lines[0] = $this->_del_prefix . $lines[0];
$lines[count($lines) - 1] .= $this->_del_suffix;
return $this->_lines($lines);
}
function _changed($orig, $final)
{
/* If we've already split on words, don't try to do so again - just
* display. */
if ($this->_split_level == 'words') {
$prefix = '';
while (substr($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";
/* 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. */
$diff = &new Text_Diff($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' => 'words')));
/* Run the diff and get the output. */
return str_replace($nl, "\n", $renderer->render($diff)) . "\n";
}
function _splitOnWords($string, $newlineEscape = "\n")
{
$words = array();
$length = strlen($string);
$pos = 0;
while ($pos < $length) {
// Eat a word with any preceding whitespace.
$spaces = strspn($string, " \n", $pos);
$nextpos = strcspn($string, " \n", $pos + $spaces);
$words[] = str_replace("\n", $newlineEscape, substr($string, $pos, $spaces + $nextpos));
$pos += $spaces + $nextpos;
}
return $words;
}
}
upload/ips_kernel/PEAR/Text/Diff/Renderer/unified.php
+49
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<?php
/**
* "Unified" diff renderer.
*
* This class renders the diff in classic "unified diff" format.
*
* $Horde: framework/Text_Diff/Diff/Renderer/unified.php,v 1.4 2005/03/07 14:58:30 jan Exp $
*
* @package Text_Diff
*/
class Text_Diff_Renderer_unified extends Text_Diff_Renderer {
/**
* Number of leading context "lines" to preserve.
*/
var $_leading_context_lines = 4;
/**
* Number of trailing context "lines" to preserve.
*/
var $_trailing_context_lines = 4;
function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
{
if ($xlen != 1) {
$xbeg .= ',' . $xlen;
}
if ($ylen != 1) {
$ybeg .= ',' . $ylen;
}
return "@@ -$xbeg +$ybeg @@";
}
function _added($lines)
{
return $this->_lines($lines, '+');
}
function _deleted($lines)
{
return $this->_lines($lines, '-');
}
function _changed($orig, $final)
{
return $this->_deleted($orig) . $this->_added($final);
}
}
upload/ips_kernel/PEAR/Text/Diff3.php
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<?php
require_once 'Text/Diff.php';
/**
* A class for computing three way diffs.
*
* $Horde: framework/Text_Diff/Diff3.php,v 1.2 2004/10/13 09:30:20 jan Exp $
*
* @package Text_Diff
* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
*/
class Text_Diff3 extends Text_Diff {
/**
* Conflict counter.
*
* @var integer $_conflictCounter
*/
var $_conflictingBlocks = 0;
/**
* Computes diff between 3 sequences of strings.
*
* @param array $orig The original lines to use.
* @param array $final1 The first version to compare to.
* @param array $final2 The second version to compare to.
*/
function Text_Diff3($orig, $final1, $final2)
{
if (extension_loaded('xdiff')) {
$engine = &new Text_Diff_Engine_xdiff();
} else {
$engine = &new Text_Diff_Engine_native();
}
$this->_edits = $this->_diff3($engine->diff($orig, $final1),
$engine->diff($orig, $final2));
}
function mergedOutput($label1 = false, $label2 = false)
{
$lines = array();
foreach ($this->_edits as $edit) {
if ($edit->isConflict()) {
/* FIXME: this should probably be moved somewhere else. */
$lines = array_merge($lines,
array('<<<<<<<' . ($label1 ? ' ' . $label1 : '')),
$edit->final1,
array("======="),
$edit->final2,
array('>>>>>>>' . ($label2 ? ' ' . $label2 : '')));
$this->_conflictingBlocks++;
} else {
$lines = array_merge($lines, $edit->merged());
}
}
return $lines;
}
/**
* @access private
*/
function _diff3($edits1, $edits2)
{
$edits = array();
$bb = &new Text_Diff3_BlockBuilder();
$e1 = current($edits1);
$e2 = current($edits2);
while ($e1 || $e2) {
if ($e1 && $e2 && is_a($e1, 'Text_Diff_Op_copy') && is_a($e2, 'Text_Diff_Op_copy')) {
/* We have copy blocks from both diffs. This is the (only)
* time we want to emit a diff3 copy block. Flush current
* diff3 diff block, if any. */
if ($edit = $bb->finish()) {
$edits[] = $edit;
}
$ncopy = min($e1->norig(), $e2->norig());
assert($ncopy > 0);
$edits[] = &new Text_Diff3_Op_copy(array_slice($e1->orig, 0, $ncopy));
if ($e1->norig() > $ncopy) {
array_splice($e1->orig, 0, $ncopy);
array_splice($e1->final, 0, $ncopy);
} else {
$e1 = next($edits1);
}
if ($e2->norig() > $ncopy) {
array_splice($e2->orig, 0, $ncopy);
array_splice($e2->final, 0, $ncopy);
} else {
$e2 = next($edits2);
}
} else {
if ($e1 && $e2) {
if ($e1->orig && $e2->orig) {
$norig = min($e1->norig(), $e2->norig());
$orig = array_splice($e1->orig, 0, $norig);
array_splice($e2->orig, 0, $norig);
$bb->input($orig);
}
if (is_a($e1, 'Text_Diff_Op_copy')) {
$bb->out1(array_splice($e1->final, 0, $norig));
}
if (is_a($e2, 'Text_Diff_Op_copy')) {
$bb->out2(array_splice($e2->final, 0, $norig));
}
}
if ($e1 && ! $e1->orig) {
$bb->out1($e1->final);
$e1 = next($edits1);
}
if ($e2 && ! $e2->orig) {
$bb->out2($e2->final);
$e2 = next($edits2);
}
}
}
if ($edit = $bb->finish()) {
$edits[] = $edit;
}
return $edits;
}
}
/**
* @package Text_Diff
* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
* @access private
*/
class Text_Diff3_Op {
function Text_Diff3_Op($orig = false, $final1 = false, $final2 = false)
{
$this->orig = $orig ? $orig : array();
$this->final1 = $final1 ? $final1 : array();
$this->final2 = $final2 ? $final2 : array();
}
function merged()
{
if (!isset($this->_merged)) {
if ($this->final1 === $this->final2) {
$this->_merged = &$this->final1;
} elseif ($this->final1 === $this->orig) {
$this->_merged = &$this->final2;
} elseif ($this->final2 === $this->orig) {
$this->_merged = &$this->final1;
} else {
$this->_merged = false;
}
}
return $this->_merged;
}
function isConflict()
{
return $this->merged() === false;
}
}
/**
* @package Text_Diff
* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
* @access private
*/
class Text_Diff3_Op_copy extends Text_Diff3_Op {
function Text_Diff3_Op_Copy($lines = false)
{
$this->orig = $lines ? $lines : array();
$this->final1 = &$this->orig;
$this->final2 = &$this->orig;
}
function merged()
{
return $this->orig;
}
function isConflict()
{
return false;
}
}
/**
* @package Text_Diff
* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
* @access private
*/
class Text_Diff3_BlockBuilder {
function Text_Diff3_BlockBuilder()
{
$this->_init();
}
function input($lines)
{
if ($lines) {
$this->_append($this->orig, $lines);
}
}
function out1($lines)
{
if ($lines) {
$this->_append($this->final1, $lines);
}
}
function out2($lines)
{
if ($lines) {
$this->_append($this->final2, $lines);
}
}
function isEmpty()
{
return !$this->orig && !$this->final1 && !$this->final2;
}
function finish()
{
if ($this->isEmpty()) {
return false;
} else {
$edit = &new Text_Diff3_Op($this->orig, $this->final1, $this->final2);
$this->_init();
return $edit;
}
}
function _init()
{
$this->orig = $this->final1 = $this->final2 = array();
}
function _append(&$array, $lines)
{
array_splice($array, sizeof($array), 0, $lines);
}
}
upload/ips_kernel/PEAR/Text/lgpl.txt
+504
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GNU LESSER GENERAL PUBLIC LICENSE
Version 2.1, February 1999
Copyright (C) 1991, 1999 Free Software Foundation, Inc.
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
[This is the first released version of the Lesser GPL. It also counts
as the successor of the GNU Library Public License, version 2, hence
the version number 2.1.]
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
Licenses are intended to guarantee your freedom to share and change
free software--to make sure the software is free for all its users.
This license, the Lesser General Public License, applies to some
specially designated software packages--typically libraries--of the
Free Software Foundation and other authors who decide to use it. You
can use it too, but we suggest you first think carefully about whether
this license or the ordinary General Public License is the better
strategy to use in any particular case, based on the explanations below.
When we speak of free software, we are referring to freedom of use,
not price. Our General Public Licenses are designed to make sure that
you have the freedom to distribute copies of free software (and charge
for this service if you wish); that you receive source code or can get
it if you want it; that you can change the software and use pieces of
it in new free programs; and that you are informed that you can do
these things.
To protect your rights, we need to make restrictions that forbid
distributors to deny you these rights or to ask you to surrender these
rights. These restrictions translate to certain responsibilities for
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For example, if you distribute copies of the library, whether gratis
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We protect your rights with a two-step method: (1) we copyright the
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To protect each distributor, we want to make it very clear that
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Finally, software patents pose a constant threat to the existence of
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When a program is linked with a library, whether statically or using
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We call this license the "Lesser" General Public License because it
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That's all there is to it!
upload/ips_kernel/PEAR/Text/package.xml
+142
View File
@@ -0,0 +1,142 @@
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE package SYSTEM "http://pear.php.net/dtd/package-1.0">
<package version="1.0" packagerversion="1.4.0a9">
<name>Text_Diff</name>
<summary>Engine for performing and rendering text diffs</summary>
<description>This package provides a text-based diff engine and renderers for multiple diff output formats.
</description>
<maintainers>
<maintainer>
<user>chagenbu</user>
<name>Chuck Hagenbuch</name>
<email>chuck@horde.org</email>
<role>lead</role>
</maintainer>
<maintainer>
<user>jon</user>
<name>Jon Parise</name>
<email>jon@horde.org</email>
<role>lead</role>
</maintainer>
<maintainer>
<user>pmjones</user>
<name>Paul M Jones</name>
<email>pmjones@memphis.edu</email>
<role>lead</role>
</maintainer>
<maintainer>
<user>yunosh</user>
<name>Jan Schneider</name>
<email>jan@horde.org</email>
<role>lead</role>
</maintainer>
</maintainers>
<release>
<version>0.0.5</version>
<date>2005-05-05</date>
<license>LGPL</license>
<state>beta</state>
<notes>* Fixed variable name in Text_MappedDiff.
* Removed output buffering code.
* Fixed additional empty lines being added with the inline renderer (Bug 3730).
* Fixed multiple calls to _endBlock per block (Bug 4065).
</notes>
<deps>
<dep type="php" rel="ge" version="4.2.0"/>
<dep type="ext" rel="has" optional="yes">xdiff</dep>
</deps>
<provides type="class" name="Text_Diff" />
<provides type="class" name="Text_Diff3" />
<provides type="class" name="Text_MappedDiff" />
<provides type="class" name="Text_Diff_Renderer" />
<provides type="class" name="Text_Diff_Engine_xdiff" />
<provides type="class" name="Text_Diff_Engine_native" />
<provides type="class" name="Text_Diff_Op" />
<provides type="class" name="Text_Diff_Op_copy" extends="Text_Diff_Op" />
<provides type="class" name="Text_Diff_Op_delete" extends="Text_Diff_Op" />
<provides type="class" name="Text_Diff_Op_add" extends="Text_Diff_Op" />
<provides type="class" name="Text_Diff_Op_change" extends="Text_Diff_Op" />
<provides type="function" name="Text_Diff::getDiff" />
<provides type="function" name="Text_Diff::reverse" />
<provides type="function" name="Text_Diff::isEmpty" />
<provides type="function" name="Text_Diff::lcs" />
<provides type="function" name="Text_Diff::getOriginal" />
<provides type="function" name="Text_Diff::getFinal" />
<provides type="function" name="Text_Diff_Engine_xdiff::diff" />
<provides type="function" name="Text_Diff_Engine_native::diff" />
<provides type="function" name="Text_Diff_Op::reverse" />
<provides type="function" name="Text_Diff_Op::norig" />
<provides type="function" name="Text_Diff_Op::nfinal" />
<provides type="function" name="Text_Diff_Op_copy::reverse" />
<provides type="function" name="Text_Diff_Op_delete::reverse" />
<provides type="function" name="Text_Diff_Op_add::reverse" />
<provides type="function" name="Text_Diff_Op_change::reverse" />
<provides type="class" name="Text_Diff3_Op" />
<provides type="class" name="Text_Diff3_Op_copy" extends="Text_Diff3_Op" />
<provides type="class" name="Text_Diff3_BlockBuilder" />
<provides type="function" name="Text_Diff3::mergedOutput" />
<provides type="function" name="Text_Diff3_Op::merged" />
<provides type="function" name="Text_Diff3_Op::isConflict" />
<provides type="function" name="Text_Diff3_Op_copy::merged" />
<provides type="function" name="Text_Diff3_Op_copy::isConflict" />
<provides type="function" name="Text_Diff3_BlockBuilder::input" />
<provides type="function" name="Text_Diff3_BlockBuilder::out1" />
<provides type="function" name="Text_Diff3_BlockBuilder::out2" />
<provides type="function" name="Text_Diff3_BlockBuilder::isEmpty" />
<provides type="function" name="Text_Diff3_BlockBuilder::finish" />
<provides type="function" name="Text_Diff_Renderer::getParams" />
<provides type="function" name="Text_Diff_Renderer::render" />
<provides type="class" name="Text_Diff_Renderer_inline" extends="Text_Diff_Renderer" />
<provides type="class" name="Text_Diff_Renderer_unified" extends="Text_Diff_Renderer" />
<filelist>
<file role="php" baseinstalldir="/Text" md5sum="16ca4ec69bf44ecd1467ebb5ee70b5df" name="Diff.php"/>
<file role="php" baseinstalldir="/Text" md5sum="7a1c6842b8b25822db3e37e5b9663da1" name="Diff3.php"/>
<file role="php" baseinstalldir="/Text" md5sum="a32f238fd2bf80cce18a745df89d7e43" name="Diff/Renderer.php"/>
<file role="php" baseinstalldir="/Text" md5sum="82ea5ce1668a6bc38ee7ece1020433b9" name="Diff/Renderer/inline.php"/>
<file role="php" baseinstalldir="/Text" md5sum="37211108109573d335251c690293d7b9" name="Diff/Renderer/unified.php"/>
<file role="doc" baseinstalldir="/Text" md5sum="d0e483e9f20738417d7a2a4fa56e074f" name="docs/examples/diff.php"/>
<file role="doc" baseinstalldir="/Text" md5sum="5fbdf5388905ed07026b876126aeee5a" name="docs/examples/1.txt"/>
<file role="doc" baseinstalldir="/Text" md5sum="011c4dad4506a4843ded1f12cab69909" name="docs/examples/2.txt"/>
<file role="test" baseinstalldir="/Text" md5sum="5fbdf5388905ed07026b876126aeee5a" name="tests/1.txt"/>
<file role="test" baseinstalldir="/Text" md5sum="011c4dad4506a4843ded1f12cab69909" name="tests/2.txt"/>
<file role="test" baseinstalldir="/Text" md5sum="adbb8551c010b970f9feb184a023c79d" name="tests/diff.phpt"/>
<file role="test" baseinstalldir="/Text" md5sum="7c2df75e9afc32c9fe4546f0322ebb0d" name="tests/inline.phpt"/>
<file role="test" baseinstalldir="/Text" md5sum="3b1e784b27e9215081ec65340bc7621a" name="tests/inline2.phpt"/>
<file role="test" baseinstalldir="/Text" md5sum="b8032a56a1ca4086caa4e90e76f1c486" name="tests/unified.phpt"/>
<file role="test" baseinstalldir="/Text" md5sum="f71a1255bdc21a43f03ee070df7c99b9" name="tests/unified2.phpt"/>
</filelist>
</release>
<changelog>
<release>
<version>0.0.4</version>
<date>2004-10-13</date>
<state>beta</state>
<notes>* Generalized Diff Renderer parameter handling.
* Added an inline renderer contributed by Ciprian Popovici (ciprian@zuavra.net).
* Fixed PHPDoc.
* Fixed a PHP 5 incompatibility.
</notes>
</release>
<release>
<version>0.0.3</version>
<date>2004-05-13</date>
<state>alpha</state>
<notes>Renamed final() and orig() methods to avoid conflict with final keyword in PHP5
</notes>
</release>
<release>
<version>0.0.2</version>
<date>2004-03-16</date>
<state>alpha</state>
<notes>Added optional xdiff support
</notes>
</release>
<release>
<version>0.0.1</version>
<date>2004-01-09</date>
<state>alpha</state>
<notes>Initial package release
</notes>
</release>
</changelog>
</package>