91 lines
2.3 KiB
PHP
91 lines
2.3 KiB
PHP
<?php
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/**
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* This file is part of the Froxlor project.
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* Copyright (c) 2010 the Froxlor Team (see authors).
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*
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* For the full copyright and license information, please view the COPYING
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* file that was distributed with this source code. You can also view the
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* COPYING file online at http://files.froxlor.org/misc/COPYING.txt
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*
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* @copyright (c) the authors
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* @author Michael Kaufmann <d00p@froxlor.org>
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* @license GPLv2 http://files.froxlor.org/misc/COPYING.txt
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* @package Functions
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*
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*/
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/**
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* compare of froxlor versions
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*
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* @param string $a
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* @param string $b
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*
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* @return integer 0 if equal, 1 if a>b and -1 if b>a
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*/
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function version_compare2($a, $b) {
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// split version into pieces and remove trailing .0
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$a = explode(".", rtrim($a, ".0"));
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$b = explode(".", rtrim($b, ".0"));
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_parseVersionArray($a);
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_parseVersionArray($b);
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while (count($a) != count($b)) {
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if (count($a) < count($b)) {
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$a[] = '0';
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}
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elseif (count($b) < count($a)) {
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$b[] = '0';
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}
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}
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foreach ($a as $depth => $aVal) {
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// iterate over each piece of A
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if (isset($b[$depth])) {
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// if B matches A to this depth, compare the values
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if ($aVal > $b[$depth]) {
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return 1; // A > B
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}
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else if ($aVal < $b[$depth]) {
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return -1; // B > A
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}
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// an equal result is inconclusive at this point
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} else {
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// if B does not match A to this depth, then A comes after B in sort order
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return 1; // so A > B
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}
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}
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// at this point, we know that to the depth that A and B extend to, they are equivalent.
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// either the loop ended because A is shorter than B, or both are equal.
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return (count($a) < count($b)) ? -1 : 0;
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}
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function _parseVersionArray(&$arr = null) {
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// -svn or -dev or -rc ?
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if (stripos($arr[count($arr)-1], '-') !== false) {
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$x = explode("-", $arr[count($arr)-1]);
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$arr[count($arr)-1] = $x[0];
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if (stripos($x[1], 'rc') !== false) {
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$arr[] = '-1';
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$arr[] = '2'; // rc > dev > svn
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// number of rc
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$arr[] = substr($x[1], 2);
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}
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else if (stripos($x[1], 'dev') !== false) {
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$arr[] = '-1';
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$arr[] = '1'; // svn < dev < rc
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// number of dev
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$arr[] = substr($x[1], 3);
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}
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// -svn version are deprecated
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else if (stripos($x[1], 'svn') !== false) {
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$arr[] = '-1';
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$arr[] = '0'; // svn < dev < rc
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// number of svn
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$arr[] = substr($x[1], 3);
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}
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}
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}
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