diff options
Diffstat (limited to 'vendor/smarty/smarty/libs/plugins/function.math.php')
-rw-r--r-- | vendor/smarty/smarty/libs/plugins/function.math.php | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/vendor/smarty/smarty/libs/plugins/function.math.php b/vendor/smarty/smarty/libs/plugins/function.math.php new file mode 100644 index 000000000..fc5db335c --- /dev/null +++ b/vendor/smarty/smarty/libs/plugins/function.math.php @@ -0,0 +1,109 @@ +<?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($equation, ")")) { + trigger_error("math: unbalanced parenthesis", E_USER_WARNING); + + return; + } + + // disallow backticks + if (strpos($equation, '`') !== false) { + trigger_error("math: backtick character not allowed in equation", E_USER_WARNING); + + return; + } + + // also disallow dollar signs + if (strpos($equation, '$') !== false) { + trigger_error("math: dollar signs not allowed in equation", 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; + } + } + } + + // match all vars in equation, make sure all are passed + preg_match_all('!(?:0x[a-fA-F0-9]+)|([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)!', $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, or missing parameter '{$curr_var}'", E_USER_WARNING); + + return; + } + } + + foreach ($params as $key => $val) { + if ($key != "equation" && $key != "format" && $key != "assign") { + $equation = preg_replace("/\b$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)); + } + } +} |