--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/smarty/internals/core.is_trusted.php	Sun Mar 23 14:59:33 2008 -0400
@@ -0,0 +1,47 @@
+<?php
+/**
+ * Smarty plugin
+ * @package Smarty
+ * @subpackage plugins
+ */
+
+/**
+ * determines if a resource is trusted or not
+ *
+ * @param string $resource_type
+ * @param string $resource_name
+ * @return boolean
+ */
+
+ // $resource_type, $resource_name
+
+function smarty_core_is_trusted($params, &$smarty)
+{
+    $_smarty_trusted = false;
+    if ($params['resource_type'] == 'file') {
+        if (!empty($smarty->trusted_dir)) {
+            $_rp = realpath($params['resource_name']);
+            foreach ((array)$smarty->trusted_dir as $curr_dir) {
+                if (!empty($curr_dir) && is_readable ($curr_dir)) {
+                    $_cd = realpath($curr_dir);
+                    if (strncmp($_rp, $_cd, strlen($_cd)) == 0
+                        && substr($_rp, strlen($_cd), 1) == DIRECTORY_SEPARATOR ) {
+                        $_smarty_trusted = true;
+                        break;
+                    }
+                }
+            }
+        }
+
+    } else {
+        // resource is not on local file system
+        $_smarty_trusted = call_user_func_array($smarty->_plugins['resource'][$params['resource_type']][0][3],
+                                                array($params['resource_name'], $smarty));
+    }
+
+    return $_smarty_trusted;
+}
+
+/* vim: set expandtab: */
+
+?>