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Diffstat (limited to 'library/Smarty/libs/plugins/function.math.php')
| -rw-r--r-- | library/Smarty/libs/plugins/function.math.php | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/library/Smarty/libs/plugins/function.math.php b/library/Smarty/libs/plugins/function.math.php new file mode 100644 index 000000000..f4d3f05ee --- /dev/null +++ b/library/Smarty/libs/plugins/function.math.php @@ -0,0 +1,87 @@ +<?php +/** + * Smarty plugin + * + * This plugin is only for Smarty2 BC + * @package Smarty + * @subpackage PluginsFunction + */ + +/** + * Smarty {math} function plugin + * + * Type: function<br> + * Name: math<br> + * Purpose: handle math computations in template + * + * @link http://www.smarty.net/manual/en/language.function.math.php {math} + * (Smarty online manual) + * @author Monte Ohrt <monte at ohrt dot com> + * @param array $params parameters + * @param Smarty_Internal_Template $template template object + * @return string|null + */ +function smarty_function_math($params, $template) +{ + static $_allowed_funcs = array( + 'int' => true, 'abs' => true, 'ceil' => true, 'cos' => true, 'exp' => true, 'floor' => true, + 'log' => true, 'log10' => true, 'max' => true, 'min' => true, 'pi' => true, 'pow' => true, + 'rand' => true, 'round' => true, 'sin' => true, 'sqrt' => true, 'srand' => true ,'tan' => true + ); + // be sure equation parameter is present + if (empty($params['equation'])) { + trigger_error("math: missing equation parameter",E_USER_WARNING); + return; + } + + $equation = $params['equation']; + + // make sure parenthesis are balanced + if (substr_count($equation,"(") != substr_count($equation,")")) { + trigger_error("math: unbalanced parenthesis",E_USER_WARNING); + return; + } + + // match all vars in equation, make sure all are passed + preg_match_all("!(?:0x[a-fA-F0-9]+)|([a-zA-Z][a-zA-Z0-9_]*)!",$equation, $match); + + foreach($match[1] as $curr_var) { + if ($curr_var && !isset($params[$curr_var]) && !isset($_allowed_funcs[$curr_var])) { + trigger_error("math: function call $curr_var not allowed",E_USER_WARNING); + return; + } + } + + foreach($params as $key => $val) { + if ($key != "equation" && $key != "format" && $key != "assign") { + // make sure value is not empty + if (strlen($val)==0) { + trigger_error("math: parameter $key is empty",E_USER_WARNING); + return; + } + if (!is_numeric($val)) { + trigger_error("math: parameter $key: is not numeric",E_USER_WARNING); + return; + } + $equation = preg_replace("/\b$key\b/", " \$params['$key'] ", $equation); + } + } + $smarty_math_result = null; + eval("\$smarty_math_result = ".$equation.";"); + + if (empty($params['format'])) { + if (empty($params['assign'])) { + return $smarty_math_result; + } else { + $template->assign($params['assign'],$smarty_math_result); + } + } else { + if (empty($params['assign'])){ + printf($params['format'],$smarty_math_result); + } else { + $template->assign($params['assign'],sprintf($params['format'],$smarty_math_result)); + } + } +} + +?>
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