gluon-web-remote

Web remote Administration for big size of gluon routers
git clone git://archive.git.mtrnord.blog/MTRNord/gluon-web-remote.git
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function.math.php (2939B)

      1 <?php
      2 /**
      3  * Smarty plugin
      4  * This plugin is only for Smarty2 BC
      5  *
      6  * @package    Smarty
      7  * @subpackage PluginsFunction
      8  */
      9 
     10 /**
     11  * Smarty {math} function plugin
     12  * Type:     function<br>
     13  * Name:     math<br>
     14  * Purpose:  handle math computations in template
     15  *
     16  * @link     http://www.smarty.net/manual/en/language.function.math.php {math}
     17  *           (Smarty online manual)
     18  * @author   Monte Ohrt <monte at ohrt dot com>
     19  *
     20  * @param array                    $params   parameters
     21  * @param Smarty_Internal_Template $template template object
     22  *
     23  * @return string|null
     24  */
     25 function smarty_function_math($params, $template)
     26 {
     27     static $_allowed_funcs = array(
     28         'int'  => true, 'abs' => true, 'ceil' => true, 'cos' => true, 'exp' => true, 'floor' => true,
     29         'log'  => true, 'log10' => true, 'max' => true, 'min' => true, 'pi' => true, 'pow' => true,
     30         'rand' => true, 'round' => true, 'sin' => true, 'sqrt' => true, 'srand' => true, 'tan' => true
     31     );
     32     // be sure equation parameter is present
     33     if (empty($params['equation'])) {
     34         trigger_error("math: missing equation parameter", E_USER_WARNING);
     35 
     36         return;
     37     }
     38 
     39     $equation = $params['equation'];
     40 
     41     // make sure parenthesis are balanced
     42     if (substr_count($equation, "(") != substr_count($equation, ")")) {
     43         trigger_error("math: unbalanced parenthesis", E_USER_WARNING);
     44 
     45         return;
     46     }
     47 
     48     // match all vars in equation, make sure all are passed
     49     preg_match_all("!(?:0x[a-fA-F0-9]+)|([a-zA-Z][a-zA-Z0-9_]*)!", $equation, $match);
     50 
     51     foreach ($match[1] as $curr_var) {
     52         if ($curr_var && !isset($params[$curr_var]) && !isset($_allowed_funcs[$curr_var])) {
     53             trigger_error("math: function call $curr_var not allowed", E_USER_WARNING);
     54 
     55             return;
     56         }
     57     }
     58 
     59     foreach ($params as $key => $val) {
     60         if ($key != "equation" && $key != "format" && $key != "assign") {
     61             // make sure value is not empty
     62             if (strlen($val) == 0) {
     63                 trigger_error("math: parameter $key is empty", E_USER_WARNING);
     64 
     65                 return;
     66             }
     67             if (!is_numeric($val)) {
     68                 trigger_error("math: parameter $key: is not numeric", E_USER_WARNING);
     69 
     70                 return;
     71             }
     72             $equation = preg_replace("/\b$key\b/", " \$params['$key'] ", $equation);
     73         }
     74     }
     75     $smarty_math_result = null;
     76     eval("\$smarty_math_result = " . $equation . ";");
     77 
     78     if (empty($params['format'])) {
     79         if (empty($params['assign'])) {
     80             return $smarty_math_result;
     81         } else {
     82             $template->assign($params['assign'], $smarty_math_result);
     83         }
     84     } else {
     85         if (empty($params['assign'])) {
     86             printf($params['format'], $smarty_math_result);
     87         } else {
     88             $template->assign($params['assign'], sprintf($params['format'], $smarty_math_result));
     89         }
     90     }
     91 }