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<?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 http://opensource.org/licenses/lgpl-license.php.
 *
 * @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;
    }

}

Nama File / Folder	Size	Action
native.php	15.516KB	Edit File Delete File Rename
shell.php	5.09KB	Edit File Delete File Rename
string.php	8.158KB	Edit File Delete File Rename
xdiff.php	2.158KB	Edit File Delete File Rename