Get rid of separate DOM HashPosition member (#18354)

Besides the fact that this is only used for DOM_NODESET and thus makes
no sense of being on the iterator itself, it's also redundant now that
we have the index member.

Author: nielsdos

ext/dom/dom_iterators.c

@@ -189,9 +189,8 @@ static void php_dom_iterator_move_forward(zend_object_iterator *iter) /* {{{ */
 			objmap->nodetype != XML_NOTATION_NODE) {
 			if (objmap->nodetype == DOM_NODESET) {
 				HashTable *nodeht = Z_ARRVAL_P(&objmap->baseobj_zv);
-				zval *entry;
-				zend_hash_move_forward_ex(nodeht, &iterator->pos);
-				if ((entry = zend_hash_get_current_data_ex(nodeht, &iterator->pos))) {
+				zval *entry = zend_hash_index_find(nodeht, iterator->index);
+				if (entry) {
 					zval_ptr_dtor(&iterator->curobj);
 					ZVAL_COPY(&iterator->curobj, entry);
 					return;
@@ -263,8 +262,6 @@ zend_object_iterator *php_dom_get_iterator(zend_class_entry *ce, zval *object, i
 	dom_object *intern;
 	dom_nnodemap_object *objmap;
 	xmlNodePtr curnode=NULL;
-	HashTable *nodeht;
-	zval *entry;
 	php_dom_iterator *iterator;
 
 	if (by_ref) {
@@ -284,9 +281,9 @@ zend_object_iterator *php_dom_get_iterator(zend_class_entry *ce, zval *object, i
 		if (objmap->nodetype != XML_ENTITY_NODE &&
 			objmap->nodetype != XML_NOTATION_NODE) {
 			if (objmap->nodetype == DOM_NODESET) {
-				nodeht = Z_ARRVAL_P(&objmap->baseobj_zv);
-				zend_hash_internal_pointer_reset_ex(nodeht, &iterator->pos);
-				if ((entry = zend_hash_get_current_data_ex(nodeht, &iterator->pos))) {
+				HashTable *nodeht = Z_ARRVAL_P(&objmap->baseobj_zv);
+				zval *entry = zend_hash_index_find(nodeht, 0);
+				if (entry) {
 					ZVAL_COPY(&iterator->curobj, entry);
 				}
 			} else {

ext/dom/php_dom.h

@@ -97,7 +97,6 @@ typedef struct dom_nnodemap_object {
 typedef struct {
 	zend_object_iterator intern;
 	zval curobj;
-	HashPosition pos;
 	/* intern->index is only updated for FE_* opcodes, not for e.g. unpacking,
 	 * yet we need to track the position of the node relative to the start. */
 	zend_ulong index;