source: branches/comu-ver2/data/module/Smarty/libs/plugins/function.math.php @ 18650

Revision 18650, 2.6 KB checked in by Seasoft, 14 years ago (diff)

#403(インクルードしているライブラリ群をバージョンアップする)

  • Smarty 2.6.13 → 2.6.26
Line 
1<?php
2/**
3 * Smarty plugin
4 * @package Smarty
5 * @subpackage plugins
6 */
7
8
9/**
10 * Smarty {math} function plugin
11 *
12 * Type:     function<br>
13 * Name:     math<br>
14 * Purpose:  handle math computations in template<br>
15 * @link http://smarty.php.net/manual/en/language.function.math.php {math}
16 *          (Smarty online manual)
17 * @author   Monte Ohrt <monte at ohrt dot com>
18 * @param array
19 * @param Smarty
20 * @return string
21 */
22function smarty_function_math($params, &$smarty)
23{
24    // be sure equation parameter is present
25    if (empty($params['equation'])) {
26        $smarty->trigger_error("math: missing equation parameter");
27        return;
28    }
29
30    // strip out backticks, not necessary for math
31    $equation = str_replace('`','',$params['equation']);
32
33    // make sure parenthesis are balanced
34    if (substr_count($equation,"(") != substr_count($equation,")")) {
35        $smarty->trigger_error("math: unbalanced parenthesis");
36        return;
37    }
38
39    // match all vars in equation, make sure all are passed
40    preg_match_all("!(?:0x[a-fA-F0-9]+)|([a-zA-Z][a-zA-Z0-9_]+)!",$equation, $match);
41    $allowed_funcs = array('int','abs','ceil','cos','exp','floor','log','log10',
42                           'max','min','pi','pow','rand','round','sin','sqrt','srand','tan');
43   
44    foreach($match[1] as $curr_var) {
45        if ($curr_var && !in_array($curr_var, array_keys($params)) && !in_array($curr_var, $allowed_funcs)) {
46            $smarty->trigger_error("math: function call $curr_var not allowed");
47            return;
48        }
49    }
50
51    foreach($params as $key => $val) {
52        if ($key != "equation" && $key != "format" && $key != "assign") {
53            // make sure value is not empty
54            if (strlen($val)==0) {
55                $smarty->trigger_error("math: parameter $key is empty");
56                return;
57            }
58            if (!is_numeric($val)) {
59                $smarty->trigger_error("math: parameter $key: is not numeric");
60                return;
61            }
62            $equation = preg_replace("/\b$key\b/", " \$params['$key'] ", $equation);
63        }
64    }
65
66    eval("\$smarty_math_result = ".$equation.";");
67
68    if (empty($params['format'])) {
69        if (empty($params['assign'])) {
70            return $smarty_math_result;
71        } else {
72            $smarty->assign($params['assign'],$smarty_math_result);
73        }
74    } else {
75        if (empty($params['assign'])){
76            printf($params['format'],$smarty_math_result);
77        } else {
78            $smarty->assign($params['assign'],sprintf($params['format'],$smarty_math_result));
79        }
80    }
81}
82
83/* vim: set expandtab: */
84
85?>
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