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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2016 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Marcus Boerger <helly@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "zend.h"
#include "zend_API.h"
#include "zend_interfaces.h"
#include "zend_exceptions.h"
ZEND_API zend_class_entry *zend_ce_traversable;
ZEND_API zend_class_entry *zend_ce_aggregate;
ZEND_API zend_class_entry *zend_ce_iterator;
ZEND_API zend_class_entry *zend_ce_arrayaccess;
ZEND_API zend_class_entry *zend_ce_serializable;
/* {{{ zend_call_method
Only returns the returned zval if retval_ptr != NULL */
ZEND_API zval* zend_call_method(zval *object, zend_class_entry *obj_ce, zend_function **fn_proxy, const char *function_name, size_t function_name_len, zval *retval_ptr, int param_count, zval* arg1, zval* arg2)
{
int result;
zend_fcall_info fci;
zval retval;
HashTable *function_table;
zval params[2];
if (param_count > 0) {
ZVAL_COPY_VALUE(&params[0], arg1);
}
if (param_count > 1) {
ZVAL_COPY_VALUE(&params[1], arg2);
}
fci.size = sizeof(fci);
/*fci.function_table = NULL; will be read form zend_class_entry of object if needed */
fci.object = (object && Z_TYPE_P(object) == IS_OBJECT) ? Z_OBJ_P(object) : NULL;
ZVAL_STRINGL(&fci.function_name, function_name, function_name_len);
fci.retval = retval_ptr ? retval_ptr : &retval;
fci.param_count = param_count;
fci.params = params;
fci.no_separation = 1;
if (!fn_proxy && !obj_ce) {
/* no interest in caching and no information already present that is
* needed later inside zend_call_function. */
result = zend_call_function(&fci, NULL);
zval_ptr_dtor(&fci.function_name);
} else {
zend_fcall_info_cache fcic;
fcic.initialized = 1;
if (!obj_ce) {
obj_ce = object ? Z_OBJCE_P(object) : NULL;
}
if (obj_ce) {
function_table = &obj_ce->function_table;
} else {
function_table = EG(function_table);
}
if (!fn_proxy || !*fn_proxy) {
if ((fcic.function_handler = zend_hash_find_ptr(function_table, Z_STR(fci.function_name))) == NULL) {
/* error at c-level */
zend_error_noreturn(E_CORE_ERROR, "Couldn't find implementation for method %s%s%s", obj_ce ? ZSTR_VAL(obj_ce->name) : "", obj_ce ? "::" : "", function_name);
}
if (fn_proxy) {
*fn_proxy = fcic.function_handler;
}
} else {
fcic.function_handler = *fn_proxy;
}
fcic.calling_scope = obj_ce;
if (object) {
fcic.called_scope = Z_OBJCE_P(object);
} else {
zend_class_entry *called_scope = zend_get_called_scope(EG(current_execute_data));
if (obj_ce &&
(!called_scope ||
!instanceof_function(called_scope, obj_ce))) {
fcic.called_scope = obj_ce;
} else {
fcic.called_scope = called_scope;
}
}
fcic.object = object ? Z_OBJ_P(object) : NULL;
result = zend_call_function(&fci, &fcic);
zval_ptr_dtor(&fci.function_name);
}
if (result == FAILURE) {
/* error at c-level */
if (!obj_ce) {
obj_ce = object ? Z_OBJCE_P(object) : NULL;
}
if (!EG(exception)) {
zend_error_noreturn(E_CORE_ERROR, "Couldn't execute method %s%s%s", obj_ce ? ZSTR_VAL(obj_ce->name) : "", obj_ce ? "::" : "", function_name);
}
}
/* copy arguments back, they might be changed by references */
if (param_count > 0 && Z_ISREF(params[0]) && !Z_ISREF_P(arg1)) {
ZVAL_COPY_VALUE(arg1, &params[0]);
}
if (param_count > 1 && Z_ISREF(params[1]) && !Z_ISREF_P(arg2)) {
ZVAL_COPY_VALUE(arg2, &params[1]);
}
if (!retval_ptr) {
zval_ptr_dtor(&retval);
return NULL;
}
return retval_ptr;
}
/* }}} */
/* iterator interface, c-level functions used by engine */
/* {{{ zend_user_it_new_iterator */
ZEND_API void zend_user_it_new_iterator(zend_class_entry *ce, zval *object, zval *retval)
{
zend_call_method_with_0_params(object, ce, &ce->iterator_funcs.zf_new_iterator, "getiterator", retval);
}
/* }}} */
/* {{{ zend_user_it_invalidate_current */
ZEND_API void zend_user_it_invalidate_current(zend_object_iterator *_iter)
{
zend_user_iterator *iter = (zend_user_iterator*)_iter;
if (!Z_ISUNDEF(iter->value)) {
zval_ptr_dtor(&iter->value);
ZVAL_UNDEF(&iter->value);
}
}
/* }}} */
/* {{{ zend_user_it_dtor */
static void zend_user_it_dtor(zend_object_iterator *_iter)
{
zend_user_iterator *iter = (zend_user_iterator*)_iter;
zval *object = &iter->it.data;
zend_user_it_invalidate_current(_iter);
zval_ptr_dtor(object);
}
/* }}} */
/* {{{ zend_user_it_valid */
ZEND_API int zend_user_it_valid(zend_object_iterator *_iter)
{
if (_iter) {
zend_user_iterator *iter = (zend_user_iterator*)_iter;
zval *object = &iter->it.data;
zval more;
int result;
zend_call_method_with_0_params(object, iter->ce, &iter->ce->iterator_funcs.zf_valid, "valid", &more);
if (Z_TYPE(more) != IS_UNDEF) {
result = i_zend_is_true(&more);
zval_ptr_dtor(&more);
return result ? SUCCESS : FAILURE;
}
}
return FAILURE;
}
/* }}} */
/* {{{ zend_user_it_get_current_data */
ZEND_API zval *zend_user_it_get_current_data(zend_object_iterator *_iter)
{
zend_user_iterator *iter = (zend_user_iterator*)_iter;
zval *object = &iter->it.data;
if (Z_ISUNDEF(iter->value)) {
zend_call_method_with_0_params(object, iter->ce, &iter->ce->iterator_funcs.zf_current, "current", &iter->value);
}
return &iter->value;
}
/* }}} */
/* {{{ zend_user_it_get_current_key_default */
#if 0
static int zend_user_it_get_current_key_default(zend_object_iterator *_iter, char **str_key, uint *str_key_len, ulong *int_key)
{
*int_key = _iter->index;
return HASH_KEY_IS_LONG;
}
#endif
/* }}} */
/* {{{ zend_user_it_get_current_key */
ZEND_API void zend_user_it_get_current_key(zend_object_iterator *_iter, zval *key)
{
zend_user_iterator *iter = (zend_user_iterator*)_iter;
zval *object = &iter->it.data;
zval retval;
zend_call_method_with_0_params(object, iter->ce, &iter->ce->iterator_funcs.zf_key, "key", &retval);
if (Z_TYPE(retval) != IS_UNDEF) {
ZVAL_ZVAL(key, &retval, 1, 1);
} else {
if (!EG(exception)) {
zend_error(E_WARNING, "Nothing returned from %s::key()", ZSTR_VAL(iter->ce->name));
}
ZVAL_LONG(key, 0);
}
}
/* }}} */
/* {{{ zend_user_it_move_forward */
ZEND_API void zend_user_it_move_forward(zend_object_iterator *_iter)
{
zend_user_iterator *iter = (zend_user_iterator*)_iter;
zval *object = &iter->it.data;
zend_user_it_invalidate_current(_iter);
zend_call_method_with_0_params(object, iter->ce, &iter->ce->iterator_funcs.zf_next, "next", NULL);
}
/* }}} */
/* {{{ zend_user_it_rewind */
ZEND_API void zend_user_it_rewind(zend_object_iterator *_iter)
{
zend_user_iterator *iter = (zend_user_iterator*)_iter;
zval *object = &iter->it.data;
zend_user_it_invalidate_current(_iter);
zend_call_method_with_0_params(object, iter->ce, &iter->ce->iterator_funcs.zf_rewind, "rewind", NULL);
}
/* }}} */
zend_object_iterator_funcs zend_interface_iterator_funcs_iterator = {
zend_user_it_dtor,
zend_user_it_valid,
zend_user_it_get_current_data,
zend_user_it_get_current_key,
zend_user_it_move_forward,
zend_user_it_rewind,
zend_user_it_invalidate_current
};
/* {{{ zend_user_it_get_iterator */
static zend_object_iterator *zend_user_it_get_iterator(zend_class_entry *ce, zval *object, int by_ref)
{
zend_user_iterator *iterator;
if (by_ref) {
zend_throw_error(NULL, "An iterator cannot be used with foreach by reference");
return NULL;
}
iterator = emalloc(sizeof(zend_user_iterator));
zend_iterator_init((zend_object_iterator*)iterator);
ZVAL_COPY(&iterator->it.data, object);
iterator->it.funcs = ce->iterator_funcs.funcs;
iterator->ce = Z_OBJCE_P(object);
ZVAL_UNDEF(&iterator->value);
return (zend_object_iterator*)iterator;
}
/* }}} */
/* {{{ zend_user_it_get_new_iterator */
ZEND_API zend_object_iterator *zend_user_it_get_new_iterator(zend_class_entry *ce, zval *object, int by_ref)
{
zval iterator;
zend_object_iterator *new_iterator;
zend_class_entry *ce_it;
zend_user_it_new_iterator(ce, object, &iterator);
ce_it = (Z_TYPE(iterator) == IS_OBJECT) ? Z_OBJCE(iterator) : NULL;
if (!ce_it || !ce_it->get_iterator || (ce_it->get_iterator == zend_user_it_get_new_iterator && Z_OBJ(iterator) == Z_OBJ_P(object))) {
if (!EG(exception)) {
zend_throw_exception_ex(NULL, 0, "Objects returned by %s::getIterator() must be traversable or implement interface Iterator", ce ? ZSTR_VAL(ce->name) : ZSTR_VAL(Z_OBJCE_P(object)->name));
}
zval_ptr_dtor(&iterator);
return NULL;
}
new_iterator = ce_it->get_iterator(ce_it, &iterator, by_ref);
zval_ptr_dtor(&iterator);
return new_iterator;
}
/* }}} */
/* {{{ zend_implement_traversable */
static int zend_implement_traversable(zend_class_entry *interface, zend_class_entry *class_type)
{
/* check that class_type is traversable at c-level or implements at least one of 'aggregate' and 'Iterator' */
uint32_t i;
if (class_type->get_iterator || (class_type->parent && class_type->parent->get_iterator)) {
return SUCCESS;
}
for (i = 0; i < class_type->num_interfaces; i++) {
if (class_type->interfaces[i] == zend_ce_aggregate || class_type->interfaces[i] == zend_ce_iterator) {
return SUCCESS;
}
}
zend_error_noreturn(E_CORE_ERROR, "Class %s must implement interface %s as part of either %s or %s",
ZSTR_VAL(class_type->name),
ZSTR_VAL(zend_ce_traversable->name),
ZSTR_VAL(zend_ce_iterator->name),
ZSTR_VAL(zend_ce_aggregate->name));
return FAILURE;
}
/* }}} */
/* {{{ zend_implement_aggregate */
static int zend_implement_aggregate(zend_class_entry *interface, zend_class_entry *class_type)
{
uint32_t i;
int t = -1;
if (class_type->get_iterator) {
if (class_type->type == ZEND_INTERNAL_CLASS) {
/* inheritance ensures the class has necessary userland methods */
return SUCCESS;
} else if (class_type->get_iterator != zend_user_it_get_new_iterator) {
/* c-level get_iterator cannot be changed (exception being only Traversable is implmented) */
if (class_type->num_interfaces) {
for (i = 0; i < class_type->num_interfaces; i++) {
if (class_type->interfaces[i] == zend_ce_iterator) {
zend_error_noreturn(E_ERROR, "Class %s cannot implement both %s and %s at the same time",
ZSTR_VAL(class_type->name),
ZSTR_VAL(interface->name),
ZSTR_VAL(zend_ce_iterator->name));
return FAILURE;
}
if (class_type->interfaces[i] == zend_ce_traversable) {
t = i;
}
}
}
if (t == -1) {
return FAILURE;
}
}
}
class_type->iterator_funcs.zf_new_iterator = NULL;
class_type->get_iterator = zend_user_it_get_new_iterator;
return SUCCESS;
}
/* }}} */
/* {{{ zend_implement_iterator */
static int zend_implement_iterator(zend_class_entry *interface, zend_class_entry *class_type)
{
if (class_type->get_iterator && class_type->get_iterator != zend_user_it_get_iterator) {
if (class_type->type == ZEND_INTERNAL_CLASS) {
/* inheritance ensures the class has the necessary userland methods */
return SUCCESS;
} else {
/* c-level get_iterator cannot be changed */
if (class_type->get_iterator == zend_user_it_get_new_iterator) {
zend_error_noreturn(E_ERROR, "Class %s cannot implement both %s and %s at the same time",
ZSTR_VAL(class_type->name),
ZSTR_VAL(interface->name),
ZSTR_VAL(zend_ce_aggregate->name));
}
return FAILURE;
}
}
class_type->get_iterator = zend_user_it_get_iterator;
class_type->iterator_funcs.zf_valid = NULL;
class_type->iterator_funcs.zf_current = NULL;
class_type->iterator_funcs.zf_key = NULL;
class_type->iterator_funcs.zf_next = NULL;
class_type->iterator_funcs.zf_rewind = NULL;
if (!class_type->iterator_funcs.funcs) {
class_type->iterator_funcs.funcs = &zend_interface_iterator_funcs_iterator;
}
return SUCCESS;
}
/* }}} */
/* {{{ zend_implement_arrayaccess */
static int zend_implement_arrayaccess(zend_class_entry *interface, zend_class_entry *class_type)
{
#if 0
/* get ht from ce */
if (ht->read_dimension != zend_std_read_dimension
|| ht->write_dimension != zend_std_write_dimension
|| ht->has_dimension != zend_std_has_dimension
|| ht->unset_dimension != zend_std_unset_dimension) {
return FAILURE;
}
#endif
return SUCCESS;
}
/* }}}*/
/* {{{ zend_user_serialize */
ZEND_API int zend_user_serialize(zval *object, unsigned char **buffer, size_t *buf_len, zend_serialize_data *data)
{
zend_class_entry * ce = Z_OBJCE_P(object);
zval retval;
int result;
zend_call_method_with_0_params(object, ce, &ce->serialize_func, "serialize", &retval);
if (Z_TYPE(retval) == IS_UNDEF || EG(exception)) {
result = FAILURE;
} else {
switch(Z_TYPE(retval)) {
case IS_NULL:
/* we could also make this '*buf_len = 0' but this allows to skip variables */
zval_ptr_dtor(&retval);
return FAILURE;
case IS_STRING:
*buffer = (unsigned char*)estrndup(Z_STRVAL(retval), Z_STRLEN(retval));
*buf_len = Z_STRLEN(retval);
result = SUCCESS;
break;
default: /* failure */
result = FAILURE;
break;
}
zval_ptr_dtor(&retval);
}
if (result == FAILURE && !EG(exception)) {
zend_throw_exception_ex(NULL, 0, "%s::serialize() must return a string or NULL", ZSTR_VAL(ce->name));
}
return result;
}
/* }}} */
/* {{{ zend_user_unserialize */
ZEND_API int zend_user_unserialize(zval *object, zend_class_entry *ce, const unsigned char *buf, size_t buf_len, zend_unserialize_data *data)
{
zval zdata;
if (UNEXPECTED(object_init_ex(object, ce) != SUCCESS)) {
return FAILURE;
}
ZVAL_STRINGL(&zdata, (char*)buf, buf_len);
zend_call_method_with_1_params(object, ce, &ce->unserialize_func, "unserialize", NULL, &zdata);
zval_ptr_dtor(&zdata);
if (EG(exception)) {
return FAILURE;
} else {
return SUCCESS;
}
}
/* }}} */
ZEND_API int zend_class_serialize_deny(zval *object, unsigned char **buffer, size_t *buf_len, zend_serialize_data *data) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zend_throw_exception_ex(NULL, 0, "Serialization of '%s' is not allowed", ZSTR_VAL(ce->name));
return FAILURE;
}
/* }}} */
ZEND_API int zend_class_unserialize_deny(zval *object, zend_class_entry *ce, const unsigned char *buf, size_t buf_len, zend_unserialize_data *data) /* {{{ */
{
zend_throw_exception_ex(NULL, 0, "Unserialization of '%s' is not allowed", ZSTR_VAL(ce->name));
return FAILURE;
}
/* }}} */
/* {{{ zend_implement_serializable */
static int zend_implement_serializable(zend_class_entry *interface, zend_class_entry *class_type)
{
if (class_type->parent
&& (class_type->parent->serialize || class_type->parent->unserialize)
&& !instanceof_function_ex(class_type->parent, zend_ce_serializable, 1)) {
return FAILURE;
}
if (!class_type->serialize) {
class_type->serialize = zend_user_serialize;
}
if (!class_type->unserialize) {
class_type->unserialize = zend_user_unserialize;
}
return SUCCESS;
}
/* }}}*/
/* {{{ function tables */
const zend_function_entry zend_funcs_aggregate[] = {
ZEND_ABSTRACT_ME(iterator, getIterator, NULL)
ZEND_FE_END
};
const zend_function_entry zend_funcs_iterator[] = {
ZEND_ABSTRACT_ME(iterator, current, NULL)
ZEND_ABSTRACT_ME(iterator, next, NULL)
ZEND_ABSTRACT_ME(iterator, key, NULL)
ZEND_ABSTRACT_ME(iterator, valid, NULL)
ZEND_ABSTRACT_ME(iterator, rewind, NULL)
ZEND_FE_END
};
const zend_function_entry *zend_funcs_traversable = NULL;
ZEND_BEGIN_ARG_INFO_EX(arginfo_arrayaccess_offset, 0, 0, 1)
ZEND_ARG_INFO(0, offset)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_arrayaccess_offset_get, 0, 0, 1) /* actually this should be return by ref but atm cannot be */
ZEND_ARG_INFO(0, offset)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_arrayaccess_offset_value, 0, 0, 2)
ZEND_ARG_INFO(0, offset)
ZEND_ARG_INFO(0, value)
ZEND_END_ARG_INFO()
const zend_function_entry zend_funcs_arrayaccess[] = {
ZEND_ABSTRACT_ME(arrayaccess, offsetExists, arginfo_arrayaccess_offset)
ZEND_ABSTRACT_ME(arrayaccess, offsetGet, arginfo_arrayaccess_offset_get)
ZEND_ABSTRACT_ME(arrayaccess, offsetSet, arginfo_arrayaccess_offset_value)
ZEND_ABSTRACT_ME(arrayaccess, offsetUnset, arginfo_arrayaccess_offset)
ZEND_FE_END
};
ZEND_BEGIN_ARG_INFO(arginfo_serializable_serialize, 0)
ZEND_ARG_INFO(0, serialized)
ZEND_END_ARG_INFO()
const zend_function_entry zend_funcs_serializable[] = {
ZEND_ABSTRACT_ME(serializable, serialize, NULL)
ZEND_FENTRY(unserialize, NULL, arginfo_serializable_serialize, ZEND_ACC_PUBLIC|ZEND_ACC_ABSTRACT|ZEND_ACC_CTOR)
ZEND_FE_END
};
/* }}} */
/* {{{ zend_register_interfaces */
ZEND_API void zend_register_interfaces(void)
{
REGISTER_MAGIC_INTERFACE(traversable, Traversable);
REGISTER_MAGIC_INTERFACE(aggregate, IteratorAggregate);
REGISTER_MAGIC_IMPLEMENT(aggregate, traversable);
REGISTER_MAGIC_INTERFACE(iterator, Iterator);
REGISTER_MAGIC_IMPLEMENT(iterator, traversable);
REGISTER_MAGIC_INTERFACE(arrayaccess, ArrayAccess);
REGISTER_MAGIC_INTERFACE(serializable, Serializable);
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/