Implement zend_hash_add_empty_element() using the existing infrastructure

Zend/zend_hash.c

@@ -153,11 +153,6 @@ ZEND_API ulong hashpjw(char *arKey, uint nKeyLength)
 		}																	\
 		memcpy(&(p)->pDataPtr, pData, sizeof(void *));						\
 		(p)->pData = &(p)->pDataPtr;										\
-	} else if (nDataSize == 0) {											\
-		if (!(p)->pDataPtr) {												\
-			pefree((p)->pData, (ht)->persistent);							\
-		}																	\
-		(p)->pData = &(p)->pDataPtr;										\
 	} else {																\
 		if ((p)->pDataPtr) {												\
 			(p)->pData = (void *) pemalloc(nDataSize, (ht)->persistent);	\
@@ -170,9 +165,6 @@ ZEND_API ulong hashpjw(char *arKey, uint nKeyLength)
 	if (nDataSize == sizeof(void*)) {									\
 		memcpy(&(p)->pDataPtr, pData, sizeof(void *));					\
 		(p)->pData = &(p)->pDataPtr;									\
-	} else if (nDataSize == 0) {										\
-		(p)->pDataPtr = (void *) 1;										\
-		(p)->pData = &(p)->pDataPtr;									\
 	} else {															\
 		(p)->pData = (void *) pemalloc(nDataSize, (ht)->persistent);	\
 		if (!(p)->pData) {												\
@@ -387,6 +379,14 @@ ZEND_API int zend_hash_quick_add_or_update(HashTable *ht, char *arKey, uint nKey
 }
 
 
+ZEND_API int zend_hash_add_empty_element(HashTable *ht, char *arKey, uint nKeyLength)
+{
+	void *dummy=NULL;
+
+	return zend_hash_add(ht, arKey, nKeyLength, &dummy, sizeof(void *), NULL);
+}
+
+
 ZEND_API int zend_hash_index_update_or_next_insert(HashTable *ht, ulong h, void *pData, uint nDataSize, void **pDest, int flag)
 {
 	uint nIndex;
@@ -1244,6 +1244,7 @@ ZEND_API ulong zend_hash_next_free_element(HashTable *ht)
 
 }
 
+
 #if ZEND_DEBUG
 void zend_hash_display_pListTail(HashTable *ht)
 {

Zend/zend_hash.h

@@ -104,6 +104,8 @@ ZEND_API int zend_hash_index_update_or_next_insert(HashTable *ht, ulong h, void
 #define zend_hash_next_index_insert(ht,pData,nDataSize,pDest) \
 		zend_hash_index_update_or_next_insert(ht,0,pData,nDataSize,pDest,HASH_NEXT_INSERT)
 
+ZEND_API int zend_hash_add_empty_element(HashTable *ht, char *arKey, uint nKeyLength);
+
 typedef struct _zend_hash_key {
 	char *arKey;
 	uint nKeyLength;