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spl_array.c
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1912 lines (1615 loc) · 54.6 KB
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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> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "ext/standard/php_var.h"
#include "zend_smart_str.h"
#include "zend_interfaces.h"
#include "zend_exceptions.h"
#include "php_spl.h"
#include "spl_functions.h"
#include "spl_iterators.h"
#include "spl_array.h"
#include "spl_array_arginfo.h"
#include "spl_exceptions.h"
zend_object_handlers spl_handler_ArrayObject;
PHPAPI zend_class_entry *spl_ce_ArrayObject;
zend_object_handlers spl_handler_ArrayIterator;
PHPAPI zend_class_entry *spl_ce_ArrayIterator;
PHPAPI zend_class_entry *spl_ce_RecursiveArrayIterator;
typedef struct _spl_array_object {
zval array;
uint32_t ht_iter;
int ar_flags;
unsigned char nApplyCount;
bool is_child;
Bucket *bucket;
zend_function *fptr_offset_get;
zend_function *fptr_offset_set;
zend_function *fptr_offset_has;
zend_function *fptr_offset_del;
zend_function *fptr_count;
zend_class_entry* ce_get_iterator;
zend_object std;
} spl_array_object;
typedef struct _spl_array_iterator {
zend_object_iterator it;
bool by_ref;
} spl_array_iterator;
static inline spl_array_object *spl_array_from_obj(zend_object *obj) /* {{{ */ {
return (spl_array_object*)((char*)(obj) - XtOffsetOf(spl_array_object, std));
}
/* }}} */
#define Z_SPLARRAY_P(zv) spl_array_from_obj(Z_OBJ_P((zv)))
static inline HashTable **spl_array_get_hash_table_ptr(spl_array_object* intern) { /* {{{ */
//??? TODO: Delay duplication for arrays; only duplicate for write operations
if (intern->ar_flags & SPL_ARRAY_IS_SELF) {
if (!intern->std.properties) {
rebuild_object_properties(&intern->std);
}
return &intern->std.properties;
} else if (intern->ar_flags & SPL_ARRAY_USE_OTHER) {
spl_array_object *other = Z_SPLARRAY_P(&intern->array);
return spl_array_get_hash_table_ptr(other);
} else if (Z_TYPE(intern->array) == IS_ARRAY) {
return &Z_ARRVAL(intern->array);
} else {
zend_object *obj = Z_OBJ(intern->array);
if (!obj->properties) {
rebuild_object_properties(obj);
} else if (GC_REFCOUNT(obj->properties) > 1) {
if (EXPECTED(!(GC_FLAGS(obj->properties) & IS_ARRAY_IMMUTABLE))) {
GC_DELREF(obj->properties);
}
obj->properties = zend_array_dup(obj->properties);
}
return &obj->properties;
}
}
/* }}} */
static inline HashTable *spl_array_get_hash_table(spl_array_object* intern) { /* {{{ */
return *spl_array_get_hash_table_ptr(intern);
}
/* }}} */
static inline bool spl_array_is_object(spl_array_object *intern) /* {{{ */
{
while (intern->ar_flags & SPL_ARRAY_USE_OTHER) {
intern = Z_SPLARRAY_P(&intern->array);
}
return (intern->ar_flags & SPL_ARRAY_IS_SELF) || Z_TYPE(intern->array) == IS_OBJECT;
}
/* }}} */
static zend_result spl_array_skip_protected(spl_array_object *intern, HashTable *aht);
static zend_never_inline void spl_array_create_ht_iter(HashTable *ht, spl_array_object* intern) /* {{{ */
{
intern->ht_iter = zend_hash_iterator_add(ht, zend_hash_get_current_pos(ht));
zend_hash_internal_pointer_reset_ex(ht, &EG(ht_iterators)[intern->ht_iter].pos);
spl_array_skip_protected(intern, ht);
}
/* }}} */
static zend_always_inline uint32_t *spl_array_get_pos_ptr(HashTable *ht, spl_array_object* intern) /* {{{ */
{
if (UNEXPECTED(intern->ht_iter == (uint32_t)-1)) {
spl_array_create_ht_iter(ht, intern);
}
return &EG(ht_iterators)[intern->ht_iter].pos;
}
/* }}} */
/* {{{ spl_array_object_free_storage */
static void spl_array_object_free_storage(zend_object *object)
{
spl_array_object *intern = spl_array_from_obj(object);
if (intern->ht_iter != (uint32_t) -1) {
zend_hash_iterator_del(intern->ht_iter);
}
zend_object_std_dtor(&intern->std);
zval_ptr_dtor(&intern->array);
}
/* }}} */
/* {{{ spl_array_object_new_ex */
static zend_object *spl_array_object_new_ex(zend_class_entry *class_type, zend_object *orig, int clone_orig)
{
spl_array_object *intern;
zend_class_entry *parent = class_type;
int inherited = 0;
intern = zend_object_alloc(sizeof(spl_array_object), parent);
zend_object_std_init(&intern->std, class_type);
object_properties_init(&intern->std, class_type);
intern->ar_flags = 0;
intern->is_child = false;
intern->bucket = NULL;
intern->ce_get_iterator = spl_ce_ArrayIterator;
if (orig) {
spl_array_object *other = spl_array_from_obj(orig);
intern->ar_flags &= ~ SPL_ARRAY_CLONE_MASK;
intern->ar_flags |= (other->ar_flags & SPL_ARRAY_CLONE_MASK);
intern->ce_get_iterator = other->ce_get_iterator;
if (clone_orig) {
if (other->ar_flags & SPL_ARRAY_IS_SELF) {
ZVAL_UNDEF(&intern->array);
} else if (orig->handlers == &spl_handler_ArrayObject) {
ZVAL_ARR(&intern->array,
zend_array_dup(spl_array_get_hash_table(other)));
} else {
ZEND_ASSERT(orig->handlers == &spl_handler_ArrayIterator);
ZVAL_OBJ_COPY(&intern->array, orig);
intern->ar_flags |= SPL_ARRAY_USE_OTHER;
}
} else {
ZVAL_OBJ_COPY(&intern->array, orig);
intern->ar_flags |= SPL_ARRAY_USE_OTHER;
}
} else {
array_init(&intern->array);
}
while (parent) {
if (parent == spl_ce_ArrayIterator || parent == spl_ce_RecursiveArrayIterator || parent == spl_ce_ArrayObject) {
break;
}
parent = parent->parent;
inherited = 1;
}
ZEND_ASSERT(parent);
if (inherited) {
intern->fptr_offset_get = zend_hash_str_find_ptr(&class_type->function_table, "offsetget", sizeof("offsetget") - 1);
if (intern->fptr_offset_get->common.scope == parent) {
intern->fptr_offset_get = NULL;
}
intern->fptr_offset_set = zend_hash_str_find_ptr(&class_type->function_table, "offsetset", sizeof("offsetset") - 1);
if (intern->fptr_offset_set->common.scope == parent) {
intern->fptr_offset_set = NULL;
}
intern->fptr_offset_has = zend_hash_str_find_ptr(&class_type->function_table, "offsetexists", sizeof("offsetexists") - 1);
if (intern->fptr_offset_has->common.scope == parent) {
intern->fptr_offset_has = NULL;
}
intern->fptr_offset_del = zend_hash_str_find_ptr(&class_type->function_table, "offsetunset", sizeof("offsetunset") - 1);
if (intern->fptr_offset_del->common.scope == parent) {
intern->fptr_offset_del = NULL;
}
/* Find count() method */
intern->fptr_count = zend_hash_find_ptr(&class_type->function_table, ZSTR_KNOWN(ZEND_STR_COUNT));
if (intern->fptr_count->common.scope == parent) {
intern->fptr_count = NULL;
}
}
intern->ht_iter = (uint32_t)-1;
return &intern->std;
}
/* }}} */
/* {{{ spl_array_object_new */
static zend_object *spl_array_object_new(zend_class_entry *class_type)
{
return spl_array_object_new_ex(class_type, NULL, 0);
}
/* }}} */
/* {{{ spl_array_object_clone */
static zend_object *spl_array_object_clone(zend_object *old_object)
{
zend_object *new_object;
new_object = spl_array_object_new_ex(old_object->ce, old_object, 1);
zend_objects_clone_members(new_object, old_object);
return new_object;
}
/* }}} */
typedef struct {
zend_string *key;
zend_ulong h;
bool release_key;
} spl_hash_key;
static void spl_hash_key_release(spl_hash_key *key) {
if (key->release_key) {
zend_string_release_ex(key->key, 0);
}
}
/* This function does not throw any exceptions for illegal offsets, calls to
* zend_illegal_container_offset(); need to be made if the return value is FAILURE */
static zend_result get_hash_key(spl_hash_key *key, spl_array_object *intern, zval *offset)
{
key->release_key = false;
try_again:
switch (Z_TYPE_P(offset)) {
case IS_NULL:
key->key = ZSTR_EMPTY_ALLOC();
return SUCCESS;
case IS_STRING:
key->key = Z_STR_P(offset);
if (ZEND_HANDLE_NUMERIC(key->key, key->h)) {
key->key = NULL;
break;
}
return SUCCESS;
case IS_RESOURCE:
zend_use_resource_as_offset(offset);
key->key = NULL;
key->h = Z_RES_P(offset)->handle;
break;
case IS_DOUBLE:
key->key = NULL;
key->h = zend_dval_to_lval_safe(Z_DVAL_P(offset));
break;
case IS_FALSE:
key->key = NULL;
key->h = 0;
break;
case IS_TRUE:
key->key = NULL;
key->h = 1;
break;
case IS_LONG:
key->key = NULL;
key->h = Z_LVAL_P(offset);
break;
case IS_REFERENCE:
ZVAL_DEREF(offset);
goto try_again;
default:
return FAILURE;
}
if (spl_array_is_object(intern)) {
key->key = zend_long_to_str(key->h);
key->release_key = true;
}
return SUCCESS;
}
static zval *spl_array_get_dimension_ptr(bool check_inherited, spl_array_object *intern, const zend_string *ce_name,
zval *offset, int type) /* {{{ */
{
zval *retval;
spl_hash_key key;
HashTable *ht = spl_array_get_hash_table(intern);
if (!offset || Z_ISUNDEF_P(offset) || !ht) {
return &EG(uninitialized_zval);
}
if ((type == BP_VAR_W || type == BP_VAR_RW) && intern->nApplyCount > 0) {
zend_throw_error(NULL, "Modification of ArrayObject during sorting is prohibited");
return &EG(error_zval);
}
if (get_hash_key(&key, intern, offset) == FAILURE) {
zend_illegal_container_offset(ce_name, offset, type);
return (type == BP_VAR_W || type == BP_VAR_RW) ?
&EG(error_zval) : &EG(uninitialized_zval);
}
if (key.key) {
retval = zend_hash_find(ht, key.key);
if (retval) {
if (Z_TYPE_P(retval) == IS_INDIRECT) {
retval = Z_INDIRECT_P(retval);
if (Z_TYPE_P(retval) == IS_UNDEF) {
switch (type) {
case BP_VAR_R:
zend_error(E_WARNING, "Undefined array key \"%s\"", ZSTR_VAL(key.key));
ZEND_FALLTHROUGH;
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_WARNING,"Undefined array key \"%s\"", ZSTR_VAL(key.key));
ZEND_FALLTHROUGH;
case BP_VAR_W: {
ZVAL_NULL(retval);
}
}
}
}
} else {
switch (type) {
case BP_VAR_R:
zend_error(E_WARNING, "Undefined array key \"%s\"", ZSTR_VAL(key.key));
ZEND_FALLTHROUGH;
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_WARNING,"Undefined array key \"%s\"", ZSTR_VAL(key.key));
ZEND_FALLTHROUGH;
case BP_VAR_W: {
zval value;
ZVAL_NULL(&value);
retval = zend_hash_update(ht, key.key, &value);
}
}
}
spl_hash_key_release(&key);
} else {
if ((retval = zend_hash_index_find(ht, key.h)) == NULL) {
switch (type) {
case BP_VAR_R:
zend_error(E_WARNING, "Undefined array key " ZEND_LONG_FMT, key.h);
ZEND_FALLTHROUGH;
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_WARNING, "Undefined array key " ZEND_LONG_FMT, key.h);
ZEND_FALLTHROUGH;
case BP_VAR_W: {
zval value;
ZVAL_NULL(&value);
retval = zend_hash_index_update(ht, key.h, &value);
}
}
}
}
return retval;
} /* }}} */
static int spl_array_has_dimension(zend_object *object, zval *offset, int check_empty);
static zval *spl_array_read_dimension_ex(int check_inherited, zend_object *object, zval *offset, int type, zval *rv) /* {{{ */
{
spl_array_object *intern = spl_array_from_obj(object);
zval *ret;
if (check_inherited &&
(intern->fptr_offset_get || (type == BP_VAR_IS && intern->fptr_offset_has))) {
if (type == BP_VAR_IS) {
if (!spl_array_has_dimension(object, offset, 0)) {
return &EG(uninitialized_zval);
}
}
if (intern->fptr_offset_get) {
zval tmp;
if (!offset) {
ZVAL_UNDEF(&tmp);
offset = &tmp;
}
zend_call_method_with_1_params(object, object->ce, &intern->fptr_offset_get, "offsetGet", rv, offset);
if (!Z_ISUNDEF_P(rv)) {
return rv;
}
return &EG(uninitialized_zval);
}
}
ret = spl_array_get_dimension_ptr(check_inherited, intern, object->ce->name, offset, type);
/* When in a write context,
* ZE has to be fooled into thinking this is in a reference set
* by separating (if necessary) and returning as IS_REFERENCE (with refcount == 1)
*/
if ((type == BP_VAR_W || type == BP_VAR_RW || type == BP_VAR_UNSET) &&
!Z_ISREF_P(ret) &&
EXPECTED(ret != &EG(uninitialized_zval))) {
ZVAL_NEW_REF(ret, ret);
}
return ret;
} /* }}} */
static zval *spl_array_read_dimension(zend_object *object, zval *offset, int type, zval *rv) /* {{{ */
{
return spl_array_read_dimension_ex(1, object, offset, type, rv);
} /* }}} */
/*
* The assertion(HT_ASSERT_RC1(ht)) failed because the refcount was increased manually when intern->is_child is true.
* We have to set the refcount to 1 to make assertion success and restore the refcount to the original value after
* modifying the array when intern->is_child is true.
*/
static uint32_t spl_array_set_refcount(bool is_child, HashTable *ht, uint32_t refcount) /* {{{ */
{
uint32_t old_refcount = 0;
if (is_child) {
old_refcount = GC_REFCOUNT(ht);
GC_SET_REFCOUNT(ht, refcount);
}
return old_refcount;
} /* }}} */
static void spl_array_write_dimension_ex(int check_inherited, zend_object *object, zval *offset, zval *value) /* {{{ */
{
spl_array_object *intern = spl_array_from_obj(object);
HashTable *ht;
spl_hash_key key;
if (check_inherited && intern->fptr_offset_set) {
zval tmp;
if (!offset) {
ZVAL_NULL(&tmp);
offset = &tmp;
}
zend_call_method_with_2_params(object, object->ce, &intern->fptr_offset_set, "offsetSet", NULL, offset, value);
return;
}
if (intern->nApplyCount > 0) {
zend_throw_error(NULL, "Modification of ArrayObject during sorting is prohibited");
return;
}
Z_TRY_ADDREF_P(value);
uint32_t refcount = 0;
if (!offset || Z_TYPE_P(offset) == IS_NULL) {
ht = spl_array_get_hash_table(intern);
refcount = spl_array_set_refcount(intern->is_child, ht, 1);
zend_hash_next_index_insert(ht, value);
if (refcount) {
spl_array_set_refcount(intern->is_child, ht, refcount);
}
return;
}
if (get_hash_key(&key, intern, offset) == FAILURE) {
zend_illegal_container_offset(object->ce->name, offset, BP_VAR_W);
zval_ptr_dtor(value);
return;
}
ht = spl_array_get_hash_table(intern);
refcount = spl_array_set_refcount(intern->is_child, ht, 1);
if (key.key) {
zend_hash_update_ind(ht, key.key, value);
spl_hash_key_release(&key);
} else {
zend_hash_index_update(ht, key.h, value);
}
if (refcount) {
spl_array_set_refcount(intern->is_child, ht, refcount);
}
} /* }}} */
static void spl_array_write_dimension(zend_object *object, zval *offset, zval *value) /* {{{ */
{
spl_array_write_dimension_ex(1, object, offset, value);
} /* }}} */
static void spl_array_unset_dimension_ex(int check_inherited, zend_object *object, zval *offset) /* {{{ */
{
HashTable *ht;
spl_array_object *intern = spl_array_from_obj(object);
spl_hash_key key;
if (check_inherited && intern->fptr_offset_del) {
zend_call_method_with_1_params(object, object->ce, &intern->fptr_offset_del, "offsetUnset", NULL, offset);
return;
}
if (intern->nApplyCount > 0) {
zend_throw_error(NULL, "Modification of ArrayObject during sorting is prohibited");
return;
}
if (get_hash_key(&key, intern, offset) == FAILURE) {
zend_illegal_container_offset(object->ce->name, offset, BP_VAR_UNSET);
return;
}
ht = spl_array_get_hash_table(intern);
uint32_t refcount = spl_array_set_refcount(intern->is_child, ht, 1);
if (key.key) {
zval *data = zend_hash_find(ht, key.key);
if (data) {
if (Z_TYPE_P(data) == IS_INDIRECT) {
data = Z_INDIRECT_P(data);
if (Z_TYPE_P(data) != IS_UNDEF) {
zval_ptr_dtor(data);
ZVAL_UNDEF(data);
HT_FLAGS(ht) |= HASH_FLAG_HAS_EMPTY_IND;
zend_hash_move_forward_ex(ht, spl_array_get_pos_ptr(ht, intern));
if (spl_array_is_object(intern)) {
spl_array_skip_protected(intern, ht);
}
}
} else {
zend_hash_del(ht, key.key);
}
}
spl_hash_key_release(&key);
} else {
zend_hash_index_del(ht, key.h);
}
if (refcount) {
spl_array_set_refcount(intern->is_child, ht, refcount);
}
} /* }}} */
static void spl_array_unset_dimension(zend_object *object, zval *offset) /* {{{ */
{
spl_array_unset_dimension_ex(1, object, offset);
} /* }}} */
/* check_empty can take value 0, 1, or 2
* 0/1 are used as normal boolean, but 2 is used for the case when this function is called from
* the offsetExists() method, in which case it needs to report the offset exist even if the value is null */
static bool spl_array_has_dimension_ex(bool check_inherited, zend_object *object, zval *offset, int check_empty) /* {{{ */
{
spl_array_object *intern = spl_array_from_obj(object);
zval rv, *value = NULL, *tmp;
if (check_inherited && intern->fptr_offset_has) {
zend_call_method_with_1_params(object, object->ce, &intern->fptr_offset_has, "offsetExists", &rv, offset);
if (!zend_is_true(&rv)) {
zval_ptr_dtor(&rv);
return 0;
}
zval_ptr_dtor(&rv);
/* For isset calls we don't need to check the value, so return early */
if (!check_empty) {
return 1;
} else if (intern->fptr_offset_get) {
value = spl_array_read_dimension_ex(1, object, offset, BP_VAR_R, &rv);
}
}
if (!value) {
HashTable *ht = spl_array_get_hash_table(intern);
spl_hash_key key;
if (get_hash_key(&key, intern, offset) == FAILURE) {
zend_illegal_container_offset(object->ce->name, offset, BP_VAR_IS);
return 0;
}
if (key.key) {
tmp = zend_hash_find(ht, key.key);
spl_hash_key_release(&key);
} else {
tmp = zend_hash_index_find(ht, key.h);
}
if (!tmp) {
return 0;
}
/* check_empty is only equal to 2 if it is called from offsetExists on this class,
* where it needs to report an offset exists even if the value is null */
if (check_empty == 2) {
return 1;
}
if (check_empty && check_inherited && intern->fptr_offset_get) {
value = spl_array_read_dimension_ex(1, object, offset, BP_VAR_R, &rv);
} else {
value = tmp;
}
}
if (value == &rv) {
zval_ptr_dtor(&rv);
}
/* empty() check the value is not falsy, isset() only check it is not null */
return check_empty ? zend_is_true(value) : Z_TYPE_P(value) != IS_NULL;
} /* }}} */
static int spl_array_has_dimension(zend_object *object, zval *offset, int check_empty) /* {{{ */
{
return spl_array_has_dimension_ex(/* check_inherited */ true, object, offset, check_empty);
} /* }}} */
/* {{{ Returns whether the requested $index exists. */
PHP_METHOD(ArrayObject, offsetExists)
{
zval *index;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "z", &index) == FAILURE) {
RETURN_THROWS();
}
RETURN_BOOL(spl_array_has_dimension_ex(/* check_inherited */ false, Z_OBJ_P(ZEND_THIS), index, 2));
} /* }}} */
/* {{{ Returns the value at the specified $index. */
PHP_METHOD(ArrayObject, offsetGet)
{
zval *value, *index;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "z", &index) == FAILURE) {
RETURN_THROWS();
}
value = spl_array_read_dimension_ex(0, Z_OBJ_P(ZEND_THIS), index, BP_VAR_R, return_value);
if (value != return_value) {
RETURN_COPY_DEREF(value);
}
} /* }}} */
/* {{{ Sets the value at the specified $index to $newval. */
PHP_METHOD(ArrayObject, offsetSet)
{
zval *index, *value;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "zz", &index, &value) == FAILURE) {
RETURN_THROWS();
}
spl_array_write_dimension_ex(0, Z_OBJ_P(ZEND_THIS), index, value);
} /* }}} */
void spl_array_iterator_append(zval *object, zval *append_value) /* {{{ */
{
spl_array_object *intern = Z_SPLARRAY_P(object);
if (spl_array_is_object(intern)) {
zend_throw_error(NULL, "Cannot append properties to objects, use %s::offsetSet() instead", ZSTR_VAL(Z_OBJCE_P(object)->name));
return;
}
spl_array_write_dimension(Z_OBJ_P(object), NULL, append_value);
} /* }}} */
/* {{{ Appends the value (cannot be called for objects). */
PHP_METHOD(ArrayObject, append)
{
zval *value;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "z", &value) == FAILURE) {
RETURN_THROWS();
}
spl_array_iterator_append(ZEND_THIS, value);
} /* }}} */
/* {{{ Unsets the value at the specified $index. */
PHP_METHOD(ArrayObject, offsetUnset)
{
zval *index;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "z", &index) == FAILURE) {
RETURN_THROWS();
}
spl_array_unset_dimension_ex(0, Z_OBJ_P(ZEND_THIS), index);
} /* }}} */
/* {{{ Return a copy of the contained array */
PHP_METHOD(ArrayObject, getArrayCopy)
{
zval *object = ZEND_THIS;
spl_array_object *intern = Z_SPLARRAY_P(object);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
RETURN_ARR(zend_array_dup(spl_array_get_hash_table(intern)));
} /* }}} */
static HashTable *spl_array_get_properties_for(zend_object *object, zend_prop_purpose purpose) /* {{{ */
{
spl_array_object *intern = spl_array_from_obj(object);
HashTable *ht;
bool dup;
if (intern->ar_flags & SPL_ARRAY_STD_PROP_LIST) {
return zend_std_get_properties_for(object, purpose);
}
/* We are supposed to be the only owner of the internal hashtable.
* The "dup" flag decides whether this is a "long-term" use where
* we need to duplicate, or a "temporary" one, where we can expect
* that no operations on the ArrayObject will be performed in the
* meantime. */
switch (purpose) {
case ZEND_PROP_PURPOSE_ARRAY_CAST:
dup = 1;
break;
case ZEND_PROP_PURPOSE_VAR_EXPORT:
case ZEND_PROP_PURPOSE_JSON:
dup = 0;
break;
default:
return zend_std_get_properties_for(object, purpose);
}
ht = spl_array_get_hash_table(intern);
if (dup) {
ht = zend_array_dup(ht);
} else {
GC_ADDREF(ht);
}
return ht;
} /* }}} */
static inline HashTable* spl_array_get_debug_info(zend_object *obj) /* {{{ */
{
zval *storage;
zend_string *zname;
zend_class_entry *base;
spl_array_object *intern = spl_array_from_obj(obj);
if (!intern->std.properties) {
rebuild_object_properties(&intern->std);
}
if (intern->ar_flags & SPL_ARRAY_IS_SELF) {
return zend_array_dup(intern->std.properties);
} else {
HashTable *debug_info;
debug_info = zend_new_array(zend_hash_num_elements(intern->std.properties) + 1);
zend_hash_copy(debug_info, intern->std.properties, (copy_ctor_func_t) zval_add_ref);
storage = &intern->array;
Z_TRY_ADDREF_P(storage);
base = obj->handlers == &spl_handler_ArrayIterator
? spl_ce_ArrayIterator : spl_ce_ArrayObject;
zname = spl_gen_private_prop_name(base, "storage", sizeof("storage")-1);
zend_symtable_update(debug_info, zname, storage);
zend_string_release_ex(zname, 0);
return debug_info;
}
}
/* }}} */
static HashTable *spl_array_get_gc(zend_object *obj, zval **gc_data, int *gc_data_count) /* {{{ */
{
spl_array_object *intern = spl_array_from_obj(obj);
*gc_data = &intern->array;
*gc_data_count = 1;
return zend_std_get_properties(obj);
}
/* }}} */
static zval *spl_array_read_property(zend_object *object, zend_string *name, int type, void **cache_slot, zval *rv) /* {{{ */
{
spl_array_object *intern = spl_array_from_obj(object);
if ((intern->ar_flags & SPL_ARRAY_ARRAY_AS_PROPS) != 0
&& !zend_std_has_property(object, name, ZEND_PROPERTY_EXISTS, NULL)) {
zval member;
ZVAL_STR(&member, name);
return spl_array_read_dimension(object, &member, type, rv);
}
return zend_std_read_property(object, name, type, cache_slot, rv);
} /* }}} */
static zval *spl_array_write_property(zend_object *object, zend_string *name, zval *value, void **cache_slot) /* {{{ */
{
spl_array_object *intern = spl_array_from_obj(object);
if ((intern->ar_flags & SPL_ARRAY_ARRAY_AS_PROPS) != 0
&& !zend_std_has_property(object, name, ZEND_PROPERTY_EXISTS, NULL)) {
zval member;
ZVAL_STR(&member, name);
spl_array_write_dimension(object, &member, value);
return value;
}
return zend_std_write_property(object, name, value, cache_slot);
} /* }}} */
static zval *spl_array_get_property_ptr_ptr(zend_object *object, zend_string *name, int type, void **cache_slot) /* {{{ */
{
spl_array_object *intern = spl_array_from_obj(object);
if ((intern->ar_flags & SPL_ARRAY_ARRAY_AS_PROPS) != 0
&& !zend_std_has_property(object, name, ZEND_PROPERTY_EXISTS, NULL)) {
/* If object has offsetGet() overridden, then fallback to read_property,
* which will call offsetGet(). */
zval member;
if (intern->fptr_offset_get) {
return NULL;
}
ZVAL_STR(&member, name);
return spl_array_get_dimension_ptr(1, intern, object->ce->name, &member, type);
}
return zend_std_get_property_ptr_ptr(object, name, type, cache_slot);
} /* }}} */
static int spl_array_has_property(zend_object *object, zend_string *name, int has_set_exists, void **cache_slot) /* {{{ */
{
spl_array_object *intern = spl_array_from_obj(object);
if ((intern->ar_flags & SPL_ARRAY_ARRAY_AS_PROPS) != 0
&& !zend_std_has_property(object, name, ZEND_PROPERTY_EXISTS, NULL)) {
zval member;
ZVAL_STR(&member, name);
return spl_array_has_dimension(object, &member, has_set_exists);
}
return zend_std_has_property(object, name, has_set_exists, cache_slot);
} /* }}} */
static void spl_array_unset_property(zend_object *object, zend_string *name, void **cache_slot) /* {{{ */
{
spl_array_object *intern = spl_array_from_obj(object);
if ((intern->ar_flags & SPL_ARRAY_ARRAY_AS_PROPS) != 0
&& !zend_std_has_property(object, name, ZEND_PROPERTY_EXISTS, NULL)) {
zval member;
ZVAL_STR(&member, name);
spl_array_unset_dimension(object, &member);
return;
}
zend_std_unset_property(object, name, cache_slot);
} /* }}} */
static int spl_array_compare_objects(zval *o1, zval *o2) /* {{{ */
{
HashTable *ht1,
*ht2;
spl_array_object *intern1,
*intern2;
int result = 0;
ZEND_COMPARE_OBJECTS_FALLBACK(o1, o2);
intern1 = Z_SPLARRAY_P(o1);
intern2 = Z_SPLARRAY_P(o2);
ht1 = spl_array_get_hash_table(intern1);
ht2 = spl_array_get_hash_table(intern2);
result = zend_compare_symbol_tables(ht1, ht2);
/* if we just compared std.properties, don't do it again */
if (result == 0 &&
!(ht1 == intern1->std.properties && ht2 == intern2->std.properties)) {
result = zend_std_compare_objects(o1, o2);
}
return result;
} /* }}} */
static zend_result spl_array_skip_protected(spl_array_object *intern, HashTable *aht) /* {{{ */
{
zend_string *string_key;
zend_ulong num_key;
zval *data;
if (spl_array_is_object(intern)) {
uint32_t *pos_ptr = spl_array_get_pos_ptr(aht, intern);
do {
if (zend_hash_get_current_key_ex(aht, &string_key, &num_key, pos_ptr) == HASH_KEY_IS_STRING) {
data = zend_hash_get_current_data_ex(aht, pos_ptr);
if (data && Z_TYPE_P(data) == IS_INDIRECT &&
Z_TYPE_P(data = Z_INDIRECT_P(data)) == IS_UNDEF) {
/* skip */
} else if (!ZSTR_LEN(string_key) || ZSTR_VAL(string_key)[0]) {
return SUCCESS;
}
} else {
return SUCCESS;
}
if (zend_hash_has_more_elements_ex(aht, pos_ptr) != SUCCESS) {
return FAILURE;
}
zend_hash_move_forward_ex(aht, pos_ptr);
} while (1);
}
return FAILURE;
} /* }}} */
static zend_result spl_array_next_ex(spl_array_object *intern, HashTable *aht) /* {{{ */
{
uint32_t *pos_ptr = spl_array_get_pos_ptr(aht, intern);
zend_hash_move_forward_ex(aht, pos_ptr);
if (spl_array_is_object(intern)) {
return spl_array_skip_protected(intern, aht);
} else {
return zend_hash_has_more_elements_ex(aht, pos_ptr);
}
} /* }}} */
static zend_result spl_array_next(spl_array_object *intern) /* {{{ */
{
HashTable *aht = spl_array_get_hash_table(intern);
return spl_array_next_ex(intern, aht);
} /* }}} */
static void spl_array_it_dtor(zend_object_iterator *iter) /* {{{ */
{
zval_ptr_dtor(&iter->data);
}
/* }}} */
static int spl_array_it_valid(zend_object_iterator *iter) /* {{{ */
{
spl_array_object *object = Z_SPLARRAY_P(&iter->data);
HashTable *aht = spl_array_get_hash_table(object);
return zend_hash_has_more_elements_ex(aht, spl_array_get_pos_ptr(aht, object));
}
/* }}} */
static zval *spl_array_it_get_current_data(zend_object_iterator *iter) /* {{{ */
{
spl_array_iterator *array_iter = (spl_array_iterator*)iter;
spl_array_object *object = Z_SPLARRAY_P(&iter->data);
HashTable *aht = spl_array_get_hash_table(object);
zval *data = zend_hash_get_current_data_ex(aht, spl_array_get_pos_ptr(aht, object));
if (data && Z_TYPE_P(data) == IS_INDIRECT) {
data = Z_INDIRECT_P(data);
}
// ZEND_FE_FETCH_RW converts the value to a reference but doesn't know the source is a property.
// Typed properties must add a type source to the reference, and readonly properties must fail.
if (array_iter->by_ref
&& Z_TYPE_P(data) != IS_REFERENCE
&& Z_TYPE(object->array) == IS_OBJECT
&& !(object->ar_flags & (SPL_ARRAY_IS_SELF|SPL_ARRAY_USE_OTHER))) {
zend_string *key;
zend_hash_get_current_key_ex(aht, &key, NULL, spl_array_get_pos_ptr(aht, object));
zend_class_entry *ce = Z_OBJCE(object->array);
zend_property_info *prop_info = zend_get_property_info(ce, key, true);
ZEND_ASSERT(prop_info != ZEND_WRONG_PROPERTY_INFO);
if (EXPECTED(prop_info != NULL) && ZEND_TYPE_IS_SET(prop_info->type)) {
if (prop_info->flags & ZEND_ACC_READONLY) {
zend_throw_error(NULL,
"Cannot acquire reference to readonly property %s::$%s",
ZSTR_VAL(prop_info->ce->name), ZSTR_VAL(key));
return NULL;
}
ZVAL_NEW_REF(data, data);
ZEND_REF_ADD_TYPE_SOURCE(Z_REF_P(data), prop_info);