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dis-bench / src /php /php-src /ext /dom /nodelist.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Christian Stocker <chregu@php.net> |
| Rob Richards <rrichards@php.net> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "php.h"
#if defined(HAVE_LIBXML) && defined(HAVE_DOM)
#include "php_dom.h"
#include "nodelist.h"
#include "zend_interfaces.h"
/*
* class DOMNodeList
*
* URL: https://www.w3.org/TR/2003/WD-DOM-Level-3-Core-20030226/DOM3-Core.html#ID-536297177
* Since:
*/
static zend_always_inline void objmap_cache_release_cached_obj(dom_nnodemap_object *objmap)
{
if (objmap->cached_obj) {
/* Since the DOM is a tree there can be no cycles. */
if (GC_DELREF(&objmap->cached_obj->std) == 0) {
zend_objects_store_del(&objmap->cached_obj->std);
}
objmap->cached_obj = NULL;
objmap->cached_obj_index = 0;
}
}
static zend_always_inline void reset_objmap_cache(dom_nnodemap_object *objmap)
{
objmap_cache_release_cached_obj(objmap);
objmap->cached_length = -1;
}
xmlNodePtr dom_nodelist_iter_start_first_child(xmlNodePtr nodep)
{
if (nodep->type == XML_ENTITY_REF_NODE) {
/* See entityreference.c */
dom_entity_reference_fetch_and_sync_declaration(nodep);
}
return nodep->children;
}
zend_long php_dom_get_nodelist_length(dom_object *obj)
{
dom_nnodemap_object *objmap = (dom_nnodemap_object *) obj->ptr;
if (!objmap) {
return 0;
}
if (objmap->ht) {
return xmlHashSize(objmap->ht);
}
if (objmap->nodetype == DOM_NODESET) {
HashTable *nodeht = Z_ARRVAL_P(&objmap->baseobj_zv);
return zend_hash_num_elements(nodeht);
}
xmlNodePtr nodep = dom_object_get_node(objmap->baseobj);
if (!nodep) {
return 0;
}
if (!php_dom_is_cache_tag_stale_from_node(&objmap->cache_tag, nodep)) {
if (objmap->cached_length >= 0) {
return objmap->cached_length;
}
/* Only the length is out-of-date, the cache tag is still valid.
* Therefore, only overwrite the length and keep the currently cached object. */
} else {
php_dom_mark_cache_tag_up_to_date_from_node(&objmap->cache_tag, nodep);
reset_objmap_cache(objmap);
}
zend_long count = 0;
if (objmap->nodetype == XML_ATTRIBUTE_NODE || objmap->nodetype == XML_ELEMENT_NODE) {
xmlNodePtr curnode = dom_nodelist_iter_start_first_child(nodep);
if (curnode) {
count++;
while (curnode->next != NULL) {
count++;
curnode = curnode->next;
}
}
} else {
xmlNodePtr basep = nodep;
nodep = php_dom_first_child_of_container_node(basep);
dom_get_elements_by_tag_name_ns_raw(
basep, nodep, objmap->ns, objmap->local, objmap->local_lower, &count, ZEND_LONG_MAX - 1 /* because of <= */);
}
objmap->cached_length = count;
return count;
}
/* {{{ length int
readonly=yes
URL: http://www.w3.org/TR/2003/WD-DOM-Level-3-Core-20030226/DOM3-Core.html#ID-203510337
Since:
*/
zend_result dom_nodelist_length_read(dom_object *obj, zval *retval)
{
ZVAL_LONG(retval, php_dom_get_nodelist_length(obj));
return SUCCESS;
}
/* }}} */
/* {{{ */
PHP_METHOD(DOMNodeList, count)
{
ZEND_PARSE_PARAMETERS_NONE();
dom_object *intern = Z_DOMOBJ_P(ZEND_THIS);
RETURN_LONG(php_dom_get_nodelist_length(intern));
}
/* }}} end dom_nodelist_count */
void php_dom_nodelist_get_item_into_zval(dom_nnodemap_object *objmap, zend_long index, zval *return_value)
{
xmlNodePtr itemnode = NULL;
bool cache_itemnode = false;
if (index >= 0) {
if (objmap != NULL) {
if (objmap->ht) {
itemnode = php_dom_libxml_hash_iter(objmap, index);
} else {
if (objmap->nodetype == DOM_NODESET) {
HashTable *nodeht = Z_ARRVAL_P(&objmap->baseobj_zv);
zval *entry = zend_hash_index_find(nodeht, index);
if (entry) {
ZVAL_COPY(return_value, entry);
return;
}
} else if (objmap->baseobj) {
xmlNodePtr basep = dom_object_get_node(objmap->baseobj);
if (basep) {
xmlNodePtr nodep = basep;
/* For now we're only able to use cache for forward search.
* TODO: in the future we could extend the logic of the node list such that backwards searches
* are also possible. */
bool restart = true;
zend_long relative_index = index;
if (index >= objmap->cached_obj_index && objmap->cached_obj && !php_dom_is_cache_tag_stale_from_node(&objmap->cache_tag, nodep)) {
xmlNodePtr cached_obj_xml_node = dom_object_get_node(objmap->cached_obj);
/* The node cannot be NULL if the cache is valid. If it is NULL, then it means we
* forgot an invalidation somewhere. Take the defensive programming approach and invalidate
* it here if it's NULL (except in debug mode where we would want to catch this). */
if (UNEXPECTED(cached_obj_xml_node == NULL)) {
#if ZEND_DEBUG
ZEND_UNREACHABLE();
#endif
reset_objmap_cache(objmap);
} else {
restart = false;
relative_index -= objmap->cached_obj_index;
nodep = cached_obj_xml_node;
}
}
zend_long count = 0;
if (objmap->nodetype == XML_ATTRIBUTE_NODE || objmap->nodetype == XML_ELEMENT_NODE) {
if (restart) {
nodep = dom_nodelist_iter_start_first_child(nodep);
}
while (count < relative_index && nodep != NULL) {
count++;
nodep = nodep->next;
}
itemnode = nodep;
} else {
if (restart) {
nodep = php_dom_first_child_of_container_node(basep);
}
itemnode = dom_get_elements_by_tag_name_ns_raw(basep, nodep, objmap->ns, objmap->local, objmap->local_lower, &count, relative_index);
}
cache_itemnode = true;
}
}
}
}
if (itemnode) {
DOM_RET_OBJ(itemnode, objmap->baseobj);
if (cache_itemnode) {
/* Hold additional reference for the cache, must happen before releasing the cache
* because we might be the last reference holder.
* Instead of storing and copying zvals, we store the object pointer directly.
* This saves us some bytes because a pointer is smaller than a zval.
* This also means we have to manually refcount the objects here, and remove the reference count
* in reset_objmap_cache() and the destructor. */
dom_object *cached_obj = Z_DOMOBJ_P(return_value);
GC_ADDREF(&cached_obj->std);
/* If the tag is stale, all cached data is useless. Otherwise only the cached object is useless. */
if (php_dom_is_cache_tag_stale_from_node(&objmap->cache_tag, itemnode)) {
php_dom_mark_cache_tag_up_to_date_from_node(&objmap->cache_tag, itemnode);
reset_objmap_cache(objmap);
} else {
objmap_cache_release_cached_obj(objmap);
}
objmap->cached_obj_index = index;
objmap->cached_obj = cached_obj;
}
return;
}
}
RETVAL_NULL();
}
/* {{{ URL: http://www.w3.org/TR/2003/WD-DOM-Level-3-Core-20030226/DOM3-Core.html#ID-844377136
Since:
*/
PHP_METHOD(DOMNodeList, item)
{
zend_long index;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_LONG(index)
ZEND_PARSE_PARAMETERS_END();
zval *id = ZEND_THIS;
dom_object *intern = Z_DOMOBJ_P(id);
dom_nnodemap_object *objmap = intern->ptr;
php_dom_nodelist_get_item_into_zval(objmap, index, return_value);
}
/* }}} end dom_nodelist_item */
ZEND_METHOD(DOMNodeList, getIterator)
{
ZEND_PARSE_PARAMETERS_NONE();
zend_create_internal_iterator_zval(return_value, ZEND_THIS);
}
dom_nodelist_dimension_index dom_modern_nodelist_get_index(const zval *offset)
{
dom_nodelist_dimension_index ret;
ZVAL_DEREF(offset);
if (Z_TYPE_P(offset) == IS_LONG) {
ret.type = DOM_NODELIST_DIM_LONG;
ret.lval = Z_LVAL_P(offset);
} else if (Z_TYPE_P(offset) == IS_DOUBLE) {
ret.type = DOM_NODELIST_DIM_LONG;
ret.lval = zend_dval_to_lval_safe(Z_DVAL_P(offset));
} else if (Z_TYPE_P(offset) == IS_STRING) {
zend_ulong lval;
if (ZEND_HANDLE_NUMERIC(Z_STR_P(offset), lval)) {
ret.type = DOM_NODELIST_DIM_LONG;
ret.lval = (zend_long) lval;
} else {
ret.type = DOM_NODELIST_DIM_STRING;
ret.str = Z_STR_P(offset);
}
} else {
ret.type = DOM_NODELIST_DIM_ILLEGAL;
}
return ret;
}
zval *dom_modern_nodelist_read_dimension(zend_object *object, zval *offset, int type, zval *rv)
{
if (UNEXPECTED(!offset)) {
zend_throw_error(NULL, "Cannot append to %s", ZSTR_VAL(object->ce->name));
return NULL;
}
dom_nodelist_dimension_index index = dom_modern_nodelist_get_index(offset);
if (UNEXPECTED(index.type == DOM_NODELIST_DIM_ILLEGAL || index.type == DOM_NODELIST_DIM_STRING)) {
zend_illegal_container_offset(object->ce->name, offset, type);
return NULL;
}
php_dom_nodelist_get_item_into_zval(php_dom_obj_from_obj(object)->ptr, index.lval, rv);
return rv;
}
int dom_modern_nodelist_has_dimension(zend_object *object, zval *member, int check_empty)
{
/* If it exists, it cannot be empty because nodes aren't empty. */
ZEND_IGNORE_VALUE(check_empty);
dom_nodelist_dimension_index index = dom_modern_nodelist_get_index(member);
if (UNEXPECTED(index.type == DOM_NODELIST_DIM_ILLEGAL || index.type == DOM_NODELIST_DIM_STRING)) {
zend_illegal_container_offset(object->ce->name, member, BP_VAR_IS);
return 0;
}
return index.lval >= 0 && index.lval < php_dom_get_nodelist_length(php_dom_obj_from_obj(object));
}
#endif