From: Andrei Zmievski <andrei@php.net>
Date: Thu, 1 Feb 2001 05:01:26 +0000 (+0000)
Subject: Added zend_is_callable() function that checks whether passed zval
X-Git-Tag: php-4.0.5RC1~411
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8fe036596f64ac30c305238ac62df6cd99b77fe7;p=php

Added zend_is_callable() function that checks whether passed zval
represents a valid and exiting callable construct.
---

diff --git a/Zend/zend_API.c b/Zend/zend_API.c
index 02d21904ac..5ad9603e5d 100644
--- a/Zend/zend_API.c
+++ b/Zend/zend_API.c
@@ -909,3 +909,43 @@ ZEND_API int zend_disable_function(char *function_name, uint function_name_lengt
 	disabled_function[0].fname = function_name;
 	return zend_register_functions(disabled_function, CG(function_table), MODULE_PERSISTENT);
 }
+
+ZEND_API zend_bool zend_is_callable(zval *function)
+{
+	char *lcname;
+	zend_bool retval = 0;
+	ELS_FETCH();
+
+	switch (Z_TYPE_P(function)) {
+		case IS_STRING:
+			lcname = estrndup(Z_STRVAL_P(function), Z_STRLEN_P(function));
+			zend_str_tolower(lcname, Z_STRLEN_P(function));
+			if (zend_hash_exists(EG(function_table), lcname, Z_STRLEN_P(function)+1)) 
+				retval = 1;
+			efree(lcname);
+			break;
+
+		case IS_ARRAY:
+			{
+				zval **method;
+				zval **obj;
+				
+				if (zend_hash_index_find(Z_ARRVAL_P(function), 0, (void **) &obj) == SUCCESS &&
+					zend_hash_index_find(Z_ARRVAL_P(function), 1, (void **) &method) == SUCCESS &&
+					Z_TYPE_PP(obj) == IS_OBJECT &&
+					Z_TYPE_PP(method) == IS_STRING) {
+					lcname = estrndup(Z_STRVAL_PP(method), Z_STRLEN_PP(method));
+					zend_str_tolower(lcname, Z_STRLEN_PP(method));
+					if (zend_hash_exists(&Z_OBJCE_PP(obj)->function_table, lcname, Z_STRLEN_PP(method)+1))
+						retval = 1;
+					efree(lcname);
+				}
+			}
+			break;
+
+		default:
+			break;
+	}
+
+	return retval;
+}
diff --git a/Zend/zend_API.h b/Zend/zend_API.h
index 4759026eb7..8ae380b948 100644
--- a/Zend/zend_API.h
+++ b/Zend/zend_API.h
@@ -120,6 +120,7 @@ ZEND_API zend_module_entry *zend_get_module(int module_number);
 ZEND_API int zend_disable_function(char *function_name, uint function_name_length);
 
 ZEND_API void wrong_param_count(void);
+ZEND_API zend_bool zend_is_callable(zval *function);
 
 #define getThis() (this_ptr)