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spl_observer.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: Marcus Boerger <helly@php.net> |
| Etienne Kneuss <colder@php.net> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "php.h"
#include "ext/standard/php_array.h" /* For PHP_COUNT_* constants */
#include "ext/standard/php_var.h"
#include "zend_smart_str.h"
#include "zend_interfaces.h"
#include "zend_exceptions.h"
#include "php_spl.h" /* For php_spl_object_hash() */
#include "spl_observer.h"
#include "spl_observer_arginfo.h"
#include "spl_iterators.h"
#include "spl_exceptions.h"
#include "spl_functions.h" /* For spl_set_private_debug_info_property() */
PHPAPI zend_class_entry *spl_ce_SplObserver;
PHPAPI zend_class_entry *spl_ce_SplSubject;
PHPAPI zend_class_entry *spl_ce_SplObjectStorage;
PHPAPI zend_class_entry *spl_ce_MultipleIterator;
static zend_object_handlers spl_handler_SplObjectStorage;
/* Bit flags for marking internal functionality overridden by SplObjectStorage subclasses. */
#define SOS_OVERRIDDEN_READ_DIMENSION 1
#define SOS_OVERRIDDEN_WRITE_DIMENSION 2
#define SOS_OVERRIDDEN_UNSET_DIMENSION 4
typedef struct _spl_SplObjectStorage { /* {{{ */
HashTable storage;
zend_long index;
HashPosition pos;
/* In SplObjectStorage, flags is a hidden implementation detail to optimize ArrayAccess handlers.
* In MultipleIterator on a different class hierarchy, flags is a user settable value controlling iteration behavior. */
zend_long flags;
zend_function *fptr_get_hash;
zend_object std;
} spl_SplObjectStorage; /* }}} */
/* {{{ storage is an assoc array of [zend_object*]=>[zval *obj, zval *inf] */
typedef struct _spl_SplObjectStorageElement {
zend_object *obj;
zval inf;
} spl_SplObjectStorageElement; /* }}} */
static inline spl_SplObjectStorage *spl_object_storage_from_obj(zend_object *obj) /* {{{ */ {
return (spl_SplObjectStorage*)((char*)(obj) - XtOffsetOf(spl_SplObjectStorage, std));
}
/* }}} */
#define Z_SPLOBJSTORAGE_P(zv) spl_object_storage_from_obj(Z_OBJ_P((zv)))
static void spl_SplObjectStorage_free_storage(zend_object *object) /* {{{ */
{
spl_SplObjectStorage *intern = spl_object_storage_from_obj(object);
zend_object_std_dtor(&intern->std);
zend_hash_destroy(&intern->storage);
} /* }}} */
static zend_result spl_object_storage_get_hash(zend_hash_key *key, spl_SplObjectStorage *intern, zend_object *obj) {
if (UNEXPECTED(intern->fptr_get_hash)) {
zval param;
zval rv;
ZVAL_OBJ(¶m, obj);
zend_call_method_with_1_params(&intern->std, intern->std.ce, &intern->fptr_get_hash, "getHash", &rv, ¶m);
if (UNEXPECTED(Z_ISUNDEF(rv))) {
/* An exception has occurred */
return FAILURE;
} else {
/* TODO PHP 9: Remove this as this will be enforced from the return type */
if (UNEXPECTED(Z_TYPE(rv) != IS_STRING)) {
zend_type_error("%s::getHash(): Return value must be of type string, %s returned",
ZSTR_VAL(intern->std.ce->name), zend_zval_value_name(&rv));
zval_ptr_dtor(&rv);
return FAILURE;
} else {
key->key = Z_STR(rv);
return SUCCESS;
}
}
} else {
key->key = NULL;
key->h = obj->handle;
return SUCCESS;
}
}
static void spl_object_storage_free_hash(spl_SplObjectStorage *intern, zend_hash_key *key) {
if (key->key) {
zend_string_release_ex(key->key, 0);
}
}
static void spl_object_storage_dtor(zval *element) /* {{{ */
{
spl_SplObjectStorageElement *el = Z_PTR_P(element);
if (el) {
zend_object_release(el->obj);
zval_ptr_dtor(&el->inf);
efree(el);
}
} /* }}} */
static spl_SplObjectStorageElement* spl_object_storage_get(spl_SplObjectStorage *intern, zend_hash_key *key) /* {{{ */
{
if (key->key) {
return zend_hash_find_ptr(&intern->storage, key->key);
} else {
return zend_hash_index_find_ptr(&intern->storage, key->h);
}
} /* }}} */
static spl_SplObjectStorageElement *spl_object_storage_create_element(zend_object *obj, zval *inf) /* {{{ */
{
spl_SplObjectStorageElement *pelement = emalloc(sizeof(spl_SplObjectStorageElement));
pelement->obj = obj;
GC_ADDREF(obj);
if (inf) {
ZVAL_COPY(&pelement->inf, inf);
} else {
ZVAL_NULL(&pelement->inf);
}
return pelement;
} /* }}} */
/* A faster version of spl_object_storage_attach used when neither SplObjectStorage->getHash nor SplObjectStorage->offsetSet is overridden. */
static spl_SplObjectStorageElement *spl_object_storage_attach_handle(spl_SplObjectStorage *intern, zend_object *obj, zval *inf) /* {{{ */
{
uint32_t handle = obj->handle;
zval *entry_zv = zend_hash_index_lookup(&intern->storage, handle);
spl_SplObjectStorageElement *pelement;
ZEND_ASSERT(!(intern->flags & SOS_OVERRIDDEN_WRITE_DIMENSION));
if (Z_TYPE_P(entry_zv) != IS_NULL) {
zval zv_inf;
ZEND_ASSERT(Z_TYPE_P(entry_zv) == IS_PTR);
pelement = Z_PTR_P(entry_zv);
ZVAL_COPY_VALUE(&zv_inf, &pelement->inf);
if (inf) {
ZVAL_COPY(&pelement->inf, inf);
} else {
ZVAL_NULL(&pelement->inf);
}
/* Call the old value's destructor last, in case it moves the entry */
zval_ptr_dtor(&zv_inf);
return pelement;
}
/* NULL initialization necessary because `spl_object_storage_create_element` could bail out due to OOM. */
ZVAL_PTR(entry_zv, NULL);
pelement = spl_object_storage_create_element(obj, inf);
Z_PTR_P(entry_zv) = pelement;
return pelement;
} /* }}} */
static spl_SplObjectStorageElement *spl_object_storage_attach(spl_SplObjectStorage *intern, zend_object *obj, zval *inf) /* {{{ */
{
if (EXPECTED(!(intern->flags & SOS_OVERRIDDEN_WRITE_DIMENSION))) {
return spl_object_storage_attach_handle(intern, obj, inf);
}
/* getHash or offsetSet is overridden. */
spl_SplObjectStorageElement *pelement, element;
zend_hash_key key;
if (spl_object_storage_get_hash(&key, intern, obj) == FAILURE) {
return NULL;
}
pelement = spl_object_storage_get(intern, &key);
if (pelement) {
zval zv_inf;
ZVAL_COPY_VALUE(&zv_inf, &pelement->inf);
if (inf) {
ZVAL_COPY(&pelement->inf, inf);
} else {
ZVAL_NULL(&pelement->inf);
}
spl_object_storage_free_hash(intern, &key);
/* Call the old value's destructor last, in case it moves the entry */
zval_ptr_dtor(&zv_inf);
return pelement;
}
element.obj = obj;
GC_ADDREF(obj);
if (inf) {
ZVAL_COPY(&element.inf, inf);
} else {
ZVAL_NULL(&element.inf);
}
if (key.key) {
pelement = zend_hash_update_mem(&intern->storage, key.key, &element, sizeof(spl_SplObjectStorageElement));
} else {
pelement = zend_hash_index_update_mem(&intern->storage, key.h, &element, sizeof(spl_SplObjectStorageElement));
}
spl_object_storage_free_hash(intern, &key);
return pelement;
} /* }}} */
static zend_result spl_object_storage_detach(spl_SplObjectStorage *intern, zend_object *obj) /* {{{ */
{
if (EXPECTED(!(intern->flags & SOS_OVERRIDDEN_UNSET_DIMENSION))) {
return zend_hash_index_del(&intern->storage, obj->handle);
}
zend_result ret = FAILURE;
zend_hash_key key;
if (spl_object_storage_get_hash(&key, intern, obj) == FAILURE) {
return ret;
}
if (key.key) {
ret = zend_hash_del(&intern->storage, key.key);
} else {
ret = zend_hash_index_del(&intern->storage, key.h);
}
spl_object_storage_free_hash(intern, &key);
return ret;
} /* }}}*/
static void spl_object_storage_addall(spl_SplObjectStorage *intern, spl_SplObjectStorage *other) { /* {{{ */
spl_SplObjectStorageElement *element;
ZEND_HASH_FOREACH_PTR(&other->storage, element) {
spl_object_storage_attach(intern, element->obj, &element->inf);
} ZEND_HASH_FOREACH_END();
intern->index = 0;
} /* }}} */
#define SPL_OBJECT_STORAGE_CLASS_HAS_OVERRIDE(class_type, zstr_method) \
(class_type->arrayaccess_funcs_ptr && class_type->arrayaccess_funcs_ptr->zstr_method)
static zend_object *spl_object_storage_new_ex(zend_class_entry *class_type, zend_object *orig) /* {{{ */
{
spl_SplObjectStorage *intern;
zend_class_entry *parent = class_type;
intern = zend_object_alloc(sizeof(spl_SplObjectStorage), parent);
intern->pos = 0;
zend_object_std_init(&intern->std, class_type);
object_properties_init(&intern->std, class_type);
zend_hash_init(&intern->storage, 0, NULL, spl_object_storage_dtor, 0);
while (parent) {
if (parent == spl_ce_SplObjectStorage) {
/* Possible optimization: Cache these results with a map from class entry to IS_NULL/IS_PTR.
* Or maybe just a single item with the result for the most recently loaded subclass. */
if (class_type != spl_ce_SplObjectStorage) {
zend_function *get_hash = zend_hash_str_find_ptr(&class_type->function_table, "gethash", sizeof("gethash") - 1);
if (get_hash->common.scope != spl_ce_SplObjectStorage) {
intern->fptr_get_hash = get_hash;
}
if (intern->fptr_get_hash != NULL ||
SPL_OBJECT_STORAGE_CLASS_HAS_OVERRIDE(class_type, zf_offsetget) ||
SPL_OBJECT_STORAGE_CLASS_HAS_OVERRIDE(class_type, zf_offsetexists)) {
intern->flags |= SOS_OVERRIDDEN_READ_DIMENSION;
}
if (intern->fptr_get_hash != NULL ||
SPL_OBJECT_STORAGE_CLASS_HAS_OVERRIDE(class_type, zf_offsetset)) {
intern->flags |= SOS_OVERRIDDEN_WRITE_DIMENSION;
}
if (intern->fptr_get_hash != NULL ||
SPL_OBJECT_STORAGE_CLASS_HAS_OVERRIDE(class_type, zf_offsetunset)) {
intern->flags |= SOS_OVERRIDDEN_UNSET_DIMENSION;
}
}
break;
}
parent = parent->parent;
}
if (orig) {
spl_SplObjectStorage *other = spl_object_storage_from_obj(orig);
spl_object_storage_addall(intern, other);
}
return &intern->std;
}
/* }}} */
/* {{{ spl_object_storage_clone */
static zend_object *spl_object_storage_clone(zend_object *old_object)
{
zend_object *new_object;
new_object = spl_object_storage_new_ex(old_object->ce, old_object);
zend_objects_clone_members(new_object, old_object);
return new_object;
}
/* }}} */
static inline HashTable* spl_object_storage_debug_info(zend_object *obj) /* {{{ */
{
spl_SplObjectStorage *intern = spl_object_storage_from_obj(obj);
spl_SplObjectStorageElement *element;
HashTable *props;
zval tmp, storage;
HashTable *debug_info;
props = obj->handlers->get_properties(obj);
debug_info = zend_new_array(zend_hash_num_elements(props) + 1);
zend_hash_copy(debug_info, props, (copy_ctor_func_t)zval_add_ref);
array_init(&storage);
ZEND_HASH_FOREACH_PTR(&intern->storage, element) {
array_init(&tmp);
/* Incrementing the refcount of obj and inf would confuse the garbage collector.
* Prefer to null the destructor */
Z_ARRVAL_P(&tmp)->pDestructor = NULL;
zval obj;
ZVAL_OBJ(&obj, element->obj);
add_assoc_zval_ex(&tmp, "obj", sizeof("obj") - 1, &obj);
add_assoc_zval_ex(&tmp, "inf", sizeof("inf") - 1, &element->inf);
zend_hash_next_index_insert(Z_ARRVAL(storage), &tmp);
} ZEND_HASH_FOREACH_END();
spl_set_private_debug_info_property(spl_ce_SplObjectStorage, "storage", strlen("storage"), debug_info, &storage);
return debug_info;
}
/* }}} */
/* overridden for garbage collection */
static HashTable *spl_object_storage_get_gc(zend_object *obj, zval **table, int *n) /* {{{ */
{
spl_SplObjectStorage *intern = spl_object_storage_from_obj(obj);
spl_SplObjectStorageElement *element;
zend_get_gc_buffer *gc_buffer = zend_get_gc_buffer_create();
ZEND_HASH_FOREACH_PTR(&intern->storage, element) {
zend_get_gc_buffer_add_obj(gc_buffer, element->obj);
zend_get_gc_buffer_add_zval(gc_buffer, &element->inf);
} ZEND_HASH_FOREACH_END();
zend_get_gc_buffer_use(gc_buffer, table, n);
return zend_std_get_properties(obj);
}
/* }}} */
static int spl_object_storage_compare_info(zval *e1, zval *e2) /* {{{ */
{
spl_SplObjectStorageElement *s1 = (spl_SplObjectStorageElement*)Z_PTR_P(e1);
spl_SplObjectStorageElement *s2 = (spl_SplObjectStorageElement*)Z_PTR_P(e2);
return zend_compare(&s1->inf, &s2->inf);
}
/* }}} */
static int spl_object_storage_compare_objects(zval *o1, zval *o2) /* {{{ */
{
zend_object *zo1;
zend_object *zo2;
ZEND_COMPARE_OBJECTS_FALLBACK(o1, o2);
zo1 = (zend_object *)Z_OBJ_P(o1);
zo2 = (zend_object *)Z_OBJ_P(o2);
if (zo1->ce != spl_ce_SplObjectStorage || zo2->ce != spl_ce_SplObjectStorage) {
return ZEND_UNCOMPARABLE;
}
return zend_hash_compare(&(Z_SPLOBJSTORAGE_P(o1))->storage, &(Z_SPLOBJSTORAGE_P(o2))->storage, (compare_func_t)spl_object_storage_compare_info, 0);
}
/* }}} */
/* {{{ spl_array_object_new */
static zend_object *spl_SplObjectStorage_new(zend_class_entry *class_type)
{
return spl_object_storage_new_ex(class_type, NULL);
}
/* }}} */
/* Returns true if the SplObjectStorage contains an entry for getHash(obj), even if the corresponding value is null. */
static bool spl_object_storage_contains(spl_SplObjectStorage *intern, zend_object *obj) /* {{{ */
{
if (EXPECTED(!intern->fptr_get_hash)) {
return zend_hash_index_find(&intern->storage, obj->handle) != NULL;
}
zend_hash_key key;
if (spl_object_storage_get_hash(&key, intern, obj) == FAILURE) {
return true;
}
ZEND_ASSERT(key.key);
bool found = zend_hash_exists(&intern->storage, key.key);
zend_string_release_ex(key.key, 0);
return found;
} /* }}} */
/* {{{ Attaches an object to the storage if not yet contained */
PHP_METHOD(SplObjectStorage, attach)
{
zend_object *obj;
zval *inf = NULL;
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
ZEND_PARSE_PARAMETERS_START(1, 2)
Z_PARAM_OBJ(obj)
Z_PARAM_OPTIONAL
Z_PARAM_ZVAL(inf)
ZEND_PARSE_PARAMETERS_END();
spl_object_storage_attach(intern, obj, inf);
} /* }}} */
// todo: make spl_object_storage_has_dimension return bool as well
static int spl_object_storage_has_dimension(zend_object *object, zval *offset, int check_empty)
{
spl_SplObjectStorage *intern = spl_object_storage_from_obj(object);
if (UNEXPECTED(offset == NULL || Z_TYPE_P(offset) != IS_OBJECT || (intern->flags & SOS_OVERRIDDEN_READ_DIMENSION))) {
/* Can't optimize empty()/isset() check if getHash, offsetExists, or offsetGet is overridden */
return zend_std_has_dimension(object, offset, check_empty);
}
spl_SplObjectStorageElement *element = zend_hash_index_find_ptr(&intern->storage, Z_OBJ_HANDLE_P(offset));
if (!element) {
return 0;
}
if (check_empty) {
return i_zend_is_true(&element->inf);
}
/* NOTE: SplObjectStorage->offsetExists() is an alias of SplObjectStorage->contains(), so this returns true even if the value is null. */
return 1;
}
static zval *spl_object_storage_read_dimension(zend_object *object, zval *offset, int type, zval *rv)
{
spl_SplObjectStorage *intern = spl_object_storage_from_obj(object);
if (UNEXPECTED(offset == NULL || Z_TYPE_P(offset) != IS_OBJECT || (intern->flags & SOS_OVERRIDDEN_READ_DIMENSION))) {
/* Can't optimize it if getHash, offsetExists, or offsetGet is overridden */
return zend_std_read_dimension(object, offset, type, rv);
}
spl_SplObjectStorageElement *element = zend_hash_index_find_ptr(&intern->storage, Z_OBJ_HANDLE_P(offset));
if (!element) {
if (type == BP_VAR_IS) {
return &EG(uninitialized_zval);
}
zend_throw_exception_ex(spl_ce_UnexpectedValueException, 0, "Object not found");
return NULL;
} else {
/* This deliberately returns a non-reference, even for BP_VAR_W and BP_VAR_RW, to behave the same way as SplObjectStorage did when using the default zend_std_read_dimension behavior.
* i.e. This prevents taking a reference to an entry of SplObjectStorage because offsetGet would return a non-reference. */
ZVAL_COPY_DEREF(rv, &element->inf);
return rv;
}
}
static void spl_object_storage_write_dimension(zend_object *object, zval *offset, zval *inf)
{
spl_SplObjectStorage *intern = spl_object_storage_from_obj(object);
if (UNEXPECTED(offset == NULL || Z_TYPE_P(offset) != IS_OBJECT || (intern->flags & SOS_OVERRIDDEN_WRITE_DIMENSION))) {
zend_std_write_dimension(object, offset, inf);
return;
}
spl_object_storage_attach_handle(intern, Z_OBJ_P(offset), inf);
}
static void spl_object_storage_unset_dimension(zend_object *object, zval *offset)
{
spl_SplObjectStorage *intern = spl_object_storage_from_obj(object);
if (UNEXPECTED(Z_TYPE_P(offset) != IS_OBJECT || (intern->flags & SOS_OVERRIDDEN_UNSET_DIMENSION))) {
zend_std_unset_dimension(object, offset);
return;
}
zend_hash_index_del(&intern->storage, Z_OBJ_HANDLE_P(offset));
}
/* {{{ Detaches an object from the storage */
PHP_METHOD(SplObjectStorage, detach)
{
zend_object *obj;
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_OBJ(obj)
ZEND_PARSE_PARAMETERS_END();
spl_object_storage_detach(intern, obj);
zend_hash_internal_pointer_reset_ex(&intern->storage, &intern->pos);
intern->index = 0;
} /* }}} */
/* {{{ Returns the hash of an object */
PHP_METHOD(SplObjectStorage, getHash)
{
zend_object *obj;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_OBJ(obj)
ZEND_PARSE_PARAMETERS_END();
RETURN_NEW_STR(php_spl_object_hash(obj));
} /* }}} */
/* {{{ Returns associated information for a stored object */
PHP_METHOD(SplObjectStorage, offsetGet)
{
zend_object *obj;
spl_SplObjectStorageElement *element;
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
zend_hash_key key;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_OBJ(obj)
ZEND_PARSE_PARAMETERS_END();
if (spl_object_storage_get_hash(&key, intern, obj) == FAILURE) {
RETURN_NULL();
}
element = spl_object_storage_get(intern, &key);
spl_object_storage_free_hash(intern, &key);
if (!element) {
zend_throw_exception_ex(spl_ce_UnexpectedValueException, 0, "Object not found");
} else {
RETURN_COPY_DEREF(&element->inf);
}
} /* }}} */
/* {{{ Add all elements contained in $os */
PHP_METHOD(SplObjectStorage, addAll)
{
zval *obj;
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
spl_SplObjectStorage *other;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &obj, spl_ce_SplObjectStorage) == FAILURE) {
RETURN_THROWS();
}
other = Z_SPLOBJSTORAGE_P(obj);
spl_object_storage_addall(intern, other);
RETURN_LONG(zend_hash_num_elements(&intern->storage));
} /* }}} */
/* {{{ Remove all elements contained in $os */
PHP_METHOD(SplObjectStorage, removeAll)
{
zval *obj;
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
spl_SplObjectStorage *other;
spl_SplObjectStorageElement *element;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &obj, spl_ce_SplObjectStorage) == FAILURE) {
RETURN_THROWS();
}
other = Z_SPLOBJSTORAGE_P(obj);
zend_hash_internal_pointer_reset(&other->storage);
while ((element = zend_hash_get_current_data_ptr(&other->storage)) != NULL) {
if (spl_object_storage_detach(intern, element->obj) == FAILURE) {
zend_hash_move_forward(&other->storage);
}
}
zend_hash_internal_pointer_reset_ex(&intern->storage, &intern->pos);
intern->index = 0;
RETURN_LONG(zend_hash_num_elements(&intern->storage));
} /* }}} */
/* {{{ Remove elements not common to both this SplObjectStorage instance and $os */
PHP_METHOD(SplObjectStorage, removeAllExcept)
{
zval *obj;
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
spl_SplObjectStorage *other;
spl_SplObjectStorageElement *element;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &obj, spl_ce_SplObjectStorage) == FAILURE) {
RETURN_THROWS();
}
other = Z_SPLOBJSTORAGE_P(obj);
ZEND_HASH_FOREACH_PTR(&intern->storage, element) {
if (!spl_object_storage_contains(other, element->obj)) {
spl_object_storage_detach(intern, element->obj);
}
} ZEND_HASH_FOREACH_END();
zend_hash_internal_pointer_reset_ex(&intern->storage, &intern->pos);
intern->index = 0;
RETURN_LONG(zend_hash_num_elements(&intern->storage));
}
/* }}} */
/* {{{ Determine whether an object is contained in the storage */
PHP_METHOD(SplObjectStorage, contains)
{
zend_object *obj;
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_OBJ(obj)
ZEND_PARSE_PARAMETERS_END();
RETURN_BOOL(spl_object_storage_contains(intern, obj));
} /* }}} */
/* {{{ Determine number of objects in storage */
PHP_METHOD(SplObjectStorage, count)
{
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
zend_long mode = PHP_COUNT_NORMAL;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|l", &mode) == FAILURE) {
RETURN_THROWS();
}
if (mode == PHP_COUNT_RECURSIVE) {
RETURN_LONG(php_count_recursive(&intern->storage));
}
RETURN_LONG(zend_hash_num_elements(&intern->storage));
} /* }}} */
/* {{{ Rewind to first position */
PHP_METHOD(SplObjectStorage, rewind)
{
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
zend_hash_internal_pointer_reset_ex(&intern->storage, &intern->pos);
intern->index = 0;
} /* }}} */
/* {{{ Returns whether current position is valid */
PHP_METHOD(SplObjectStorage, valid)
{
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
RETURN_BOOL(zend_hash_has_more_elements_ex(&intern->storage, &intern->pos) == SUCCESS);
} /* }}} */
/* {{{ Returns current key */
PHP_METHOD(SplObjectStorage, key)
{
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
RETURN_LONG(intern->index);
} /* }}} */
/* {{{ Returns current element */
PHP_METHOD(SplObjectStorage, current)
{
spl_SplObjectStorageElement *element;
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
if ((element = zend_hash_get_current_data_ptr_ex(&intern->storage, &intern->pos)) == NULL) {
zend_throw_exception(spl_ce_RuntimeException, "Called current() on invalid iterator", 0);
RETURN_THROWS();
}
ZVAL_OBJ_COPY(return_value, element->obj);
} /* }}} */
/* {{{ Returns associated information to current element */
PHP_METHOD(SplObjectStorage, getInfo)
{
spl_SplObjectStorageElement *element;
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
if ((element = zend_hash_get_current_data_ptr_ex(&intern->storage, &intern->pos)) == NULL) {
RETURN_NULL();
}
ZVAL_COPY(return_value, &element->inf);
} /* }}} */
/* {{{ Sets associated information of current element to $inf */
PHP_METHOD(SplObjectStorage, setInfo)
{
spl_SplObjectStorageElement *element;
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
zval *inf;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "z", &inf) == FAILURE) {
RETURN_THROWS();
}
if ((element = zend_hash_get_current_data_ptr_ex(&intern->storage, &intern->pos)) == NULL) {
RETURN_NULL();
}
zval garbage;
ZVAL_COPY_VALUE(&garbage, &element->inf);
ZVAL_COPY(&element->inf, inf);
zval_ptr_dtor(&garbage);
} /* }}} */
/* {{{ Moves position forward */
PHP_METHOD(SplObjectStorage, next)
{
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
zend_hash_move_forward_ex(&intern->storage, &intern->pos);
intern->index++;
} /* }}} */
/* {{{ Seek to position. */
PHP_METHOD(SplObjectStorage, seek)
{
zend_long position;
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &position) == FAILURE) {
RETURN_THROWS();
}
if (position < 0 || position >= zend_hash_num_elements(&intern->storage)) {
zend_throw_exception_ex(spl_ce_OutOfBoundsException, 0, "Seek position " ZEND_LONG_FMT " is out of range", position);
RETURN_THROWS();
}
if (position == 0) {
/* fast path */
zend_hash_internal_pointer_reset_ex(&intern->storage, &intern->pos);
intern->index = 0;
} else if (position > intern->index) {
/* unlike the optimization below, it's not cheap to go to the end */
do {
zend_hash_move_forward_ex(&intern->storage, &intern->pos);
intern->index++;
} while (position > intern->index);
} else if (position < intern->index) {
/* optimization: check if it's more profitable to reset and do a forwards seek instead, it's cheap to reset */
if (intern->index - position > position) {
zend_hash_internal_pointer_reset_ex(&intern->storage, &intern->pos);
intern->index = 0;
do {
zend_hash_move_forward_ex(&intern->storage, &intern->pos);
intern->index++;
} while (position > intern->index);
} else {
do {
zend_hash_move_backwards_ex(&intern->storage, &intern->pos);
intern->index--;
} while (position < intern->index);
}
}
} /* }}} */
/* {{{ Serializes storage */
PHP_METHOD(SplObjectStorage, serialize)
{
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
spl_SplObjectStorageElement *element;
zval members, flags;
HashPosition pos;
php_serialize_data_t var_hash;
smart_str buf = {0};
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
PHP_VAR_SERIALIZE_INIT(var_hash);
/* storage */
smart_str_appendl(&buf, "x:", 2);
ZVAL_LONG(&flags, zend_hash_num_elements(&intern->storage));
php_var_serialize(&buf, &flags, &var_hash);
zend_hash_internal_pointer_reset_ex(&intern->storage, &pos);
while (zend_hash_has_more_elements_ex(&intern->storage, &pos) == SUCCESS) {
zval obj;
if ((element = zend_hash_get_current_data_ptr_ex(&intern->storage, &pos)) == NULL) {
smart_str_free(&buf);
PHP_VAR_SERIALIZE_DESTROY(var_hash);
RETURN_NULL();
}
ZVAL_OBJ(&obj, element->obj);
/* Protect against modification; we need a full copy because the data may be refcounted. */
zval inf_copy;
ZVAL_COPY(&inf_copy, &element->inf);
php_var_serialize(&buf, &obj, &var_hash);
smart_str_appendc(&buf, ',');
php_var_serialize(&buf, &inf_copy, &var_hash);
smart_str_appendc(&buf, ';');
zend_hash_move_forward_ex(&intern->storage, &pos);
zval_ptr_dtor(&inf_copy);
}
/* members */
smart_str_appendl(&buf, "m:", 2);
ZVAL_ARR(&members, zend_array_dup(zend_std_get_properties(Z_OBJ_P(ZEND_THIS))));
php_var_serialize(&buf, &members, &var_hash); /* finishes the string */
zval_ptr_dtor(&members);
/* done */
PHP_VAR_SERIALIZE_DESTROY(var_hash);
RETURN_STR(smart_str_extract(&buf));
} /* }}} */
/* {{{ Unserializes storage */
PHP_METHOD(SplObjectStorage, unserialize)
{
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
char *buf;
size_t buf_len;
const unsigned char *p, *s;
php_unserialize_data_t var_hash;
zval *pcount, *pmembers;
spl_SplObjectStorageElement *element;
zend_long count;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &buf, &buf_len) == FAILURE) {
RETURN_THROWS();
}
if (buf_len == 0) {
return;
}
/* storage */
s = p = (const unsigned char*)buf;
PHP_VAR_UNSERIALIZE_INIT(var_hash);
if (*p!= 'x' || *++p != ':') {
goto outexcept;
}
++p;
pcount = var_tmp_var(&var_hash);
if (!php_var_unserialize(pcount, &p, s + buf_len, &var_hash) || Z_TYPE_P(pcount) != IS_LONG) {
goto outexcept;
}
--p; /* for ';' */
count = Z_LVAL_P(pcount);
if (count < 0) {
goto outexcept;
}
while (count-- > 0) {
spl_SplObjectStorageElement *pelement;
zend_hash_key key;
zval *entry = var_tmp_var(&var_hash);
zval inf;
ZVAL_UNDEF(&inf);
if (*p != ';') {
goto outexcept;
}
++p;
if(*p != 'O' && *p != 'C' && *p != 'r') {
goto outexcept;
}
/* store reference to allow cross-references between different elements */
if (!php_var_unserialize(entry, &p, s + buf_len, &var_hash)) {
goto outexcept;
}
if (*p == ',') { /* new version has inf */
++p;
if (!php_var_unserialize(&inf, &p, s + buf_len, &var_hash)) {
zval_ptr_dtor(&inf);
goto outexcept;
}
}
if (Z_TYPE_P(entry) != IS_OBJECT) {
zval_ptr_dtor(&inf);
goto outexcept;
}
if (spl_object_storage_get_hash(&key, intern, Z_OBJ_P(entry)) == FAILURE) {
zval_ptr_dtor(&inf);
goto outexcept;
}
pelement = spl_object_storage_get(intern, &key);
spl_object_storage_free_hash(intern, &key);
if (pelement) {
zval obj;
if (!Z_ISUNDEF(pelement->inf)) {
var_push_dtor(&var_hash, &pelement->inf);
}
ZVAL_OBJ(&obj, pelement->obj);
var_push_dtor(&var_hash, &obj);
}
element = spl_object_storage_attach(intern, Z_OBJ_P(entry), Z_ISUNDEF(inf)?NULL:&inf);
var_replace(&var_hash, &inf, &element->inf);
zval_ptr_dtor(&inf);
}
if (*p != ';') {
goto outexcept;
}
++p;
/* members */
if (*p!= 'm' || *++p != ':') {
goto outexcept;
}
++p;
pmembers = var_tmp_var(&var_hash);
if (!php_var_unserialize(pmembers, &p, s + buf_len, &var_hash) || Z_TYPE_P(pmembers) != IS_ARRAY) {
goto outexcept;
}
/* copy members */
object_properties_load(&intern->std, Z_ARRVAL_P(pmembers));
PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
return;
outexcept:
PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
zend_throw_exception_ex(spl_ce_UnexpectedValueException, 0, "Error at offset %zd of %zd bytes", ((char*)p - buf), buf_len);
RETURN_THROWS();
} /* }}} */
/* {{{ */
PHP_METHOD(SplObjectStorage, __serialize)
{
spl_SplObjectStorage *intern = Z_SPLOBJSTORAGE_P(ZEND_THIS);
spl_SplObjectStorageElement *elem;
zval tmp;
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
array_init(return_value);
/* storage */
array_init_size(&tmp, 2 * zend_hash_num_elements(&intern->storage));
ZEND_HASH_FOREACH_PTR(&intern->storage, elem) {
zval obj;
ZVAL_OBJ_COPY(&obj, elem->obj);
zend_hash_next_index_insert(Z_ARRVAL(tmp), &obj);
Z_TRY_ADDREF(elem->inf);