From: Marcus Boerger <helly@php.net>
Date: Thu, 29 May 2003 21:08:08 +0000 (+0000)
Subject: Optimize interface checks
X-Git-Tag: RELEASE_1_0_2~533
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=283f52f415ce644c1a1ae626d34a3f76983fd3df;p=php

Optimize interface checks
---

diff --git a/ext/spl/spl_engine.c b/ext/spl/spl_engine.c
index 02be8d000d..1f4bb78f47 100755
--- a/ext/spl/spl_engine.c
+++ b/ext/spl/spl_engine.c
@@ -144,34 +144,27 @@ int spl_is_instance_of(zval **obj, zend_class_entry *ce TSRMLS_DC)
 	zend_class_entry *instance_ce;
 
 	if (obj && (instance_ce = spl_get_class_entry(*obj TSRMLS_CC)) != NULL) {
-		if (instanceof_function(instance_ce, ce TSRMLS_CC)) {
-			return 1;
-		}
+		return instanceof_function(instance_ce, ce TSRMLS_CC);
 	}
 	return 0;
 }
 /* }}} */
 
 /* {{{ spl_implements */
-int spl_implements(zval **obj, zend_class_entry *ce TSRMLS_DC)
+spl_is_a spl_implements(zend_class_entry *ce)
 {
-	/* Ensure everything needed is available before checking for the type.
-	 */
-	zend_class_entry *instance_ce;
-
-	if (obj && (instance_ce = spl_get_class_entry(*obj TSRMLS_CC)) != NULL) {
-		int i;
-
-		while (instance_ce) {
-			for (i = 0; i < instance_ce->num_interfaces; i++) {
-				if (instance_ce->interfaces[i] == ce) {
-					return 1;
-				}
-			}
-			instance_ce = instance_ce->parent;
-		}
+	register spl_is_a is_a = 0;
+	register int i = ce->num_interfaces;
+	register zend_class_entry **pce = ce->interfaces;
+
+	while (i--) {
+		if (*pce == spl_ce_iterator)      is_a |= SPL_IS_A_ITERATOR;
+		else if (*pce == spl_ce_forward)  is_a |= SPL_IS_A_FORWARD;
+		else if (*pce == spl_ce_assoc)    is_a |= SPL_IS_A_ASSOC;
+		else if (*pce == spl_ce_sequence) is_a |= SPL_IS_A_SEQUENCE;
+		pce++;
 	}
-	return spl_is_instance_of(obj, ce TSRMLS_CC);
+	return is_a;
 }
 /* }}} */
 
diff --git a/ext/spl/spl_engine.h b/ext/spl/spl_engine.h
index 90d2320734..ae9db4a450 100755
--- a/ext/spl/spl_engine.h
+++ b/ext/spl/spl_engine.h
@@ -106,7 +106,15 @@ void spl_unlock_zval_ptr_ptr(znode *node, temp_variable *Ts TSRMLS_DC);
 zval * spl_get_zval_ptr(znode *node, temp_variable *Ts, zval **should_free TSRMLS_DC);
 
 int spl_is_instance_of(zval **obj, zend_class_entry *ce TSRMLS_DC);
-int spl_implements(zval **obj, zend_class_entry *ce TSRMLS_DC);
+
+typedef enum {
+	SPL_IS_A_ITERATOR = 1,
+	SPL_IS_A_FORWARD  = 2,
+	SPL_IS_A_ASSOC    = 4,
+	SPL_IS_A_SEQUENCE = 8
+} spl_is_a;
+
+spl_is_a spl_implements(zend_class_entry *ce);
 
 #endif /* SPL_ENGINE_H */
 
diff --git a/ext/spl/spl_foreach.c b/ext/spl/spl_foreach.c
index abf64ccd57..6476a82461 100755
--- a/ext/spl/spl_foreach.c
+++ b/ext/spl/spl_foreach.c
@@ -40,7 +40,7 @@ typedef struct {
 	zval             *obj;
 	zend_class_entry *obj_ce;
 	zend_uint        index;
-	zend_uint        is_ce_assoc;
+	spl_is_a         is_a;
 	zend_function    *f_next;
 	zend_function    *f_rewind;
 	zend_function    *f_more;
@@ -53,17 +53,26 @@ ZEND_EXECUTE_HOOK_FUNCTION(ZEND_FE_RESET)
 {
 	zval **obj, *retval;
 	spl_foreach_proxy proxy;
+	zend_class_entry *instance_ce;
+	spl_is_a is_a = 0;
 
 	obj = spl_get_zval_ptr_ptr(&EX(opline)->op1, EX(Ts) TSRMLS_CC);
-	if (spl_implements(obj, spl_ce_iterator TSRMLS_CC)) {
+
+	if (obj && (instance_ce = spl_get_class_entry(*obj TSRMLS_CC)) != NULL) {
+		is_a = spl_implements(instance_ce);
+	}
+
+	if (is_a & SPL_IS_A_ITERATOR) {
 		spl_unlock_zval_ptr_ptr(&EX(opline)->op1, EX(Ts) TSRMLS_CC);
 		spl_begin_method_call_ex(obj, NULL, NULL, "new_iterator", sizeof("new_iterator")-1, &retval TSRMLS_CC);
-		if (!spl_implements(&retval, spl_ce_forward TSRMLS_CC)) {
+		instance_ce = spl_get_class_entry(retval TSRMLS_CC);
+		is_a = spl_implements(instance_ce);
+		if (!(is_a & SPL_IS_A_FORWARD)) {
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Objects created by new_iterator() must implement spl::forward");
 			ZEND_EXECUTE_HOOK_ORIGINAL(ZEND_FE_RESET);
 		}
 		PZVAL_LOCK(retval);
-	} else if (spl_implements(obj, spl_ce_forward TSRMLS_CC)) {
+	} else if (is_a & SPL_IS_A_FORWARD) {
 		spl_unlock_zval_ptr_ptr(&EX(opline)->op1, EX(Ts) TSRMLS_CC);
 		(*obj)->refcount += 2; /* lock two times */
 		retval = *obj;
@@ -74,8 +83,8 @@ ZEND_EXECUTE_HOOK_FUNCTION(ZEND_FE_RESET)
 	/* create the proxy */
 	memset(&proxy, 0, sizeof(spl_foreach_proxy));
 	proxy.obj = retval;
-	proxy.obj_ce = spl_get_class_entry(retval TSRMLS_CC);
-	proxy.is_ce_assoc = spl_implements(&retval, spl_ce_assoc TSRMLS_CC);
+	proxy.obj_ce = instance_ce;
+	proxy.is_a = is_a;
 	/* And pack it into a zval. Since it is nowhere accessible using a 
 	 * zval of type STRING is the fastest approach of storing the proxy.
 	 */
@@ -130,7 +139,7 @@ ZEND_EXECUTE_HOOK_FUNCTION(ZEND_FE_FETCH)
 		if (proxy->index++) {
 			spl_begin_method_call_this(obj, proxy->obj_ce, &proxy->f_next, "next", sizeof("next")-1, &tmp TSRMLS_CC);
 		} else {
-			if (spl_implements(obj, spl_ce_sequence TSRMLS_CC)) {
+			if (proxy->is_a & SPL_IS_A_SEQUENCE) {
 				spl_begin_method_call_this(obj, proxy->obj_ce, &proxy->f_rewind, "rewind", sizeof("rewind")-1, &tmp TSRMLS_CC);
 			}
 			op_array->opcodes[EX(opline)->op2.u.opline_num].op2 = *op1;
@@ -142,7 +151,7 @@ ZEND_EXECUTE_HOOK_FUNCTION(ZEND_FE_FETCH)
 
 			spl_begin_method_call_ex(obj, proxy->obj_ce, &proxy->f_current, "current", sizeof("current")-1, &value TSRMLS_CC);
 
-			if (proxy->is_ce_assoc) {
+			if (proxy->is_a & SPL_IS_A_ASSOC) {
 				spl_begin_method_call_ex(obj, proxy->obj_ce, &proxy->f_key, "key", sizeof("key")-1, &key TSRMLS_CC);
 			} else {
 				MAKE_STD_ZVAL(key);