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Diffstat (limited to 'Moodle/mod/print/compat/version_compare.php')
| -rw-r--r-- | Moodle/mod/print/compat/version_compare.php | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/Moodle/mod/print/compat/version_compare.php b/Moodle/mod/print/compat/version_compare.php new file mode 100644 index 0000000..a1211ea --- /dev/null +++ b/Moodle/mod/print/compat/version_compare.php @@ -0,0 +1,179 @@ +<?php +// +----------------------------------------------------------------------+ +// | PHP Version 4 | +// +----------------------------------------------------------------------+ +// | Copyright (c) 1997-2004 The PHP Group | +// +----------------------------------------------------------------------+ +// | This source file is subject to version 3.0 of the PHP license, | +// | that is bundled with this package in the file LICENSE, and is | +// | available at through the world-wide-web at | +// | http://www.php.net/license/3_0.txt. | +// | If you did not receive a copy of the PHP license and are unable to | +// | obtain it through the world-wide-web, please send a note to | +// | license@php.net so we can mail you a copy immediately. | +// +----------------------------------------------------------------------+ +// | Authors: Philippe Jausions <Philippe.Jausions@11abacus.com> | +// | Aidan Lister <aidan@php.net> | +// +----------------------------------------------------------------------+ +// +// $Id: version_compare.php 2 2009-03-16 20:22:51Z ggiunta $ + + +/** + * Replace version_compare() + * + * @category PHP + * @package PHP_Compat + * @link http://php.net/function.version_compare + * @author Philippe Jausions <Philippe.Jausions@11abacus.com> + * @author Aidan Lister <aidan@php.net> + * @version $Revision: 1.1 $ + * @since PHP 4.1.0 + * @require PHP 4.0.0 (user_error) + */ +if (!function_exists('version_compare')) { + function version_compare($version1, $version2, $operator = '<') + { + // Check input + if (!is_scalar($version1)) { + user_error('version_compare() expects parameter 1 to be string, ' . + gettype($version1) . ' given', E_USER_WARNING); + return; + } + + if (!is_scalar($version2)) { + user_error('version_compare() expects parameter 2 to be string, ' . + gettype($version2) . ' given', E_USER_WARNING); + return; + } + + if (!is_scalar($operator)) { + user_error('version_compare() expects parameter 3 to be string, ' . + gettype($operator) . ' given', E_USER_WARNING); + return; + } + + // Standardise versions + $v1 = explode('.', + str_replace('..', '.', + preg_replace('/([^0-9\.]+)/', '.$1.', + str_replace(array('-', '_', '+'), '.', + trim($version1))))); + + $v2 = explode('.', + str_replace('..', '.', + preg_replace('/([^0-9\.]+)/', '.$1.', + str_replace(array('-', '_', '+'), '.', + trim($version2))))); + + // Replace empty entries at the start of the array + while (empty($v1[0]) && array_shift($v1)) {} + while (empty($v2[0]) && array_shift($v2)) {} + + // Release state order + // '#' stands for any number + $versions = array( + 'dev' => 0, + 'alpha' => 1, + 'a' => 1, + 'beta' => 2, + 'b' => 2, + 'RC' => 3, + '#' => 4, + 'p' => 5, + 'pl' => 5); + + // Loop through each segment in the version string + $compare = 0; + for ($i = 0, $x = min(count($v1), count($v2)); $i < $x; $i++) { + if ($v1[$i] == $v2[$i]) { + continue; + } + $i1 = $v1[$i]; + $i2 = $v2[$i]; + if (is_numeric($i1) && is_numeric($i2)) { + $compare = ($i1 < $i2) ? -1 : 1; + break; + } + // We use the position of '#' in the versions list + // for numbers... (so take care of # in original string) + if ($i1 == '#') { + $i1 = ''; + } elseif (is_numeric($i1)) { + $i1 = '#'; + } + if ($i2 == '#') { + $i2 = ''; + } elseif (is_numeric($i2)) { + $i2 = '#'; + } + if (isset($versions[$i1]) && isset($versions[$i2])) { + $compare = ($versions[$i1] < $versions[$i2]) ? -1 : 1; + } elseif (isset($versions[$i1])) { + $compare = 1; + } elseif (isset($versions[$i2])) { + $compare = -1; + } else { + $compare = 0; + } + + break; + } + + // If previous loop didn't find anything, compare the "extra" segments + if ($compare == 0) { + if (count($v2) > count($v1)) { + if (isset($versions[$v2[$i]])) { + $compare = ($versions[$v2[$i]] < 4) ? 1 : -1; + } else { + $compare = -1; + } + } elseif (count($v2) < count($v1)) { + if (isset($versions[$v1[$i]])) { + $compare = ($versions[$v1[$i]] < 4) ? -1 : 1; + } else { + $compare = 1; + } + } + } + + // Compare the versions + if (func_num_args() > 2) { + switch ($operator) { + case '>': + case 'gt': + return (bool) ($compare > 0); + break; + case '>=': + case 'ge': + return (bool) ($compare >= 0); + break; + case '<=': + case 'le': + return (bool) ($compare <= 0); + break; + case '==': + case '=': + case 'eq': + return (bool) ($compare == 0); + break; + case '<>': + case '!=': + case 'ne': + return (bool) ($compare != 0); + break; + case '': + case '<': + case 'lt': + return (bool) ($compare < 0); + break; + default: + return; + } + } + + return $compare; + } +} + +?>
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