mirror of
https://github.com/php/php-src.git
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582 lines
18 KiB
C
582 lines
18 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2014 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Marcus Boerger <helly@php.net> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "zend.h"
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#include "zend_API.h"
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#include "zend_interfaces.h"
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#include "zend_exceptions.h"
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ZEND_API zend_class_entry *zend_ce_traversable;
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ZEND_API zend_class_entry *zend_ce_aggregate;
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ZEND_API zend_class_entry *zend_ce_iterator;
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ZEND_API zend_class_entry *zend_ce_arrayaccess;
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ZEND_API zend_class_entry *zend_ce_serializable;
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/* {{{ zend_call_method
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Only returns the returned zval if retval_ptr != NULL */
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ZEND_API zval* zend_call_method(zval *object, zend_class_entry *obj_ce, zend_function **fn_proxy, const char *function_name, int function_name_len, zval *retval_ptr, int param_count, zval* arg1, zval* arg2 TSRMLS_DC)
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{
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int result;
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zend_fcall_info fci;
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zval retval;
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HashTable *function_table;
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zval params[2];
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if (param_count > 0) {
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ZVAL_COPY_VALUE(¶ms[0], arg1);
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}
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if (param_count > 1) {
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ZVAL_COPY_VALUE(¶ms[1], arg2);
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}
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fci.size = sizeof(fci);
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/*fci.function_table = NULL; will be read form zend_class_entry of object if needed */
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fci.object = (object && Z_TYPE_P(object) == IS_OBJECT) ? Z_OBJ_P(object) : NULL;
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ZVAL_STRINGL(&fci.function_name, function_name, function_name_len);
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fci.retval = retval_ptr ? retval_ptr : &retval;
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fci.param_count = param_count;
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fci.params = params;
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fci.no_separation = 1;
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fci.symbol_table = NULL;
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if (!fn_proxy && !obj_ce) {
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/* no interest in caching and no information already present that is
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* needed later inside zend_call_function. */
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fci.function_table = !object ? EG(function_table) : NULL;
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result = zend_call_function(&fci, NULL TSRMLS_CC);
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zval_ptr_dtor(&fci.function_name);
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} else {
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zend_fcall_info_cache fcic;
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fcic.initialized = 1;
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if (!obj_ce) {
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obj_ce = object ? Z_OBJCE_P(object) : NULL;
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}
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if (obj_ce) {
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function_table = &obj_ce->function_table;
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} else {
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function_table = EG(function_table);
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}
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if (!fn_proxy || !*fn_proxy) {
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if ((fcic.function_handler = zend_hash_find_ptr(function_table, Z_STR(fci.function_name))) == NULL) {
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/* error at c-level */
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zend_error(E_CORE_ERROR, "Couldn't find implementation for method %s%s%s", obj_ce ? obj_ce->name->val : "", obj_ce ? "::" : "", function_name);
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}
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if (fn_proxy) {
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*fn_proxy = fcic.function_handler;
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}
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} else {
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fcic.function_handler = *fn_proxy;
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}
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fcic.calling_scope = obj_ce;
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if (object) {
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fcic.called_scope = Z_OBJCE_P(object);
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} else if (obj_ce &&
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!(EG(called_scope) &&
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instanceof_function(EG(called_scope), obj_ce TSRMLS_CC))) {
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fcic.called_scope = obj_ce;
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} else {
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fcic.called_scope = EG(called_scope);
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}
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fcic.object = object ? Z_OBJ_P(object) : NULL;
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result = zend_call_function(&fci, &fcic TSRMLS_CC);
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zval_ptr_dtor(&fci.function_name);
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}
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if (result == FAILURE) {
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/* error at c-level */
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if (!obj_ce) {
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obj_ce = object ? Z_OBJCE_P(object) : NULL;
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}
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if (!EG(exception)) {
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zend_error(E_CORE_ERROR, "Couldn't execute method %s%s%s", obj_ce ? obj_ce->name->val : "", obj_ce ? "::" : "", function_name);
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}
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}
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/* copy arguments back, they might be changed by references */
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if (param_count > 0 && Z_ISREF(params[0]) && !Z_ISREF_P(arg1)) {
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ZVAL_COPY_VALUE(arg1, ¶ms[0]);
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}
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if (param_count > 1 && Z_ISREF(params[1]) && !Z_ISREF_P(arg2)) {
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ZVAL_COPY_VALUE(arg2, ¶ms[1]);
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}
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if (!retval_ptr) {
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zval_ptr_dtor(&retval);
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return NULL;
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}
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return retval_ptr;
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}
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/* }}} */
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/* iterator interface, c-level functions used by engine */
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/* {{{ zend_user_it_new_iterator */
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ZEND_API void zend_user_it_new_iterator(zend_class_entry *ce, zval *object, zval *retval TSRMLS_DC)
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{
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zend_call_method_with_0_params(object, ce, &ce->iterator_funcs.zf_new_iterator, "getiterator", retval);
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}
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/* }}} */
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/* {{{ zend_user_it_invalidate_current */
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ZEND_API void zend_user_it_invalidate_current(zend_object_iterator *_iter TSRMLS_DC)
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{
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zend_user_iterator *iter = (zend_user_iterator*)_iter;
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if (!Z_ISUNDEF(iter->value)) {
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zval_ptr_dtor(&iter->value);
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ZVAL_UNDEF(&iter->value);
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}
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}
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/* }}} */
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/* {{{ zend_user_it_dtor */
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static void zend_user_it_dtor(zend_object_iterator *_iter TSRMLS_DC)
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{
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zend_user_iterator *iter = (zend_user_iterator*)_iter;
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zval *object = &iter->it.data;
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zend_user_it_invalidate_current(_iter TSRMLS_CC);
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zval_ptr_dtor(object);
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}
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/* }}} */
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/* {{{ zend_user_it_valid */
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ZEND_API int zend_user_it_valid(zend_object_iterator *_iter TSRMLS_DC)
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{
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if (_iter) {
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zend_user_iterator *iter = (zend_user_iterator*)_iter;
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zval *object = &iter->it.data;
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zval more;
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int result;
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zend_call_method_with_0_params(object, iter->ce, &iter->ce->iterator_funcs.zf_valid, "valid", &more);
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if (Z_TYPE(more) != IS_UNDEF) {
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result = i_zend_is_true(&more TSRMLS_CC);
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zval_ptr_dtor(&more);
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return result ? SUCCESS : FAILURE;
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}
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}
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return FAILURE;
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}
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/* }}} */
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/* {{{ zend_user_it_get_current_data */
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ZEND_API zval *zend_user_it_get_current_data(zend_object_iterator *_iter TSRMLS_DC)
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{
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zend_user_iterator *iter = (zend_user_iterator*)_iter;
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zval *object = &iter->it.data;
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if (Z_ISUNDEF(iter->value)) {
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zend_call_method_with_0_params(object, iter->ce, &iter->ce->iterator_funcs.zf_current, "current", &iter->value);
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}
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return &iter->value;
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}
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/* }}} */
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/* {{{ zend_user_it_get_current_key_default */
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#if 0
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static int zend_user_it_get_current_key_default(zend_object_iterator *_iter, char **str_key, uint *str_key_len, ulong *int_key TSRMLS_DC)
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{
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*int_key = _iter->index;
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return HASH_KEY_IS_LONG;
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}
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#endif
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/* }}} */
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/* {{{ zend_user_it_get_current_key */
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ZEND_API void zend_user_it_get_current_key(zend_object_iterator *_iter, zval *key TSRMLS_DC)
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{
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zend_user_iterator *iter = (zend_user_iterator*)_iter;
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zval *object = &iter->it.data;
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zval retval;
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zend_call_method_with_0_params(object, iter->ce, &iter->ce->iterator_funcs.zf_key, "key", &retval);
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if (Z_TYPE(retval) != IS_UNDEF) {
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ZVAL_ZVAL(key, &retval, 1, 1);
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} else {
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if (!EG(exception)) {
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zend_error(E_WARNING, "Nothing returned from %s::key()", iter->ce->name->val);
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}
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ZVAL_LONG(key, 0);
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}
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}
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/* }}} */
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/* {{{ zend_user_it_move_forward */
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ZEND_API void zend_user_it_move_forward(zend_object_iterator *_iter TSRMLS_DC)
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{
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zend_user_iterator *iter = (zend_user_iterator*)_iter;
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zval *object = &iter->it.data;
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zend_user_it_invalidate_current(_iter TSRMLS_CC);
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zend_call_method_with_0_params(object, iter->ce, &iter->ce->iterator_funcs.zf_next, "next", NULL);
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}
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/* }}} */
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/* {{{ zend_user_it_rewind */
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ZEND_API void zend_user_it_rewind(zend_object_iterator *_iter TSRMLS_DC)
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{
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zend_user_iterator *iter = (zend_user_iterator*)_iter;
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zval *object = &iter->it.data;
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zend_user_it_invalidate_current(_iter TSRMLS_CC);
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zend_call_method_with_0_params(object, iter->ce, &iter->ce->iterator_funcs.zf_rewind, "rewind", NULL);
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}
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/* }}} */
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zend_object_iterator_funcs zend_interface_iterator_funcs_iterator = {
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zend_user_it_dtor,
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zend_user_it_valid,
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zend_user_it_get_current_data,
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zend_user_it_get_current_key,
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zend_user_it_move_forward,
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zend_user_it_rewind,
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zend_user_it_invalidate_current
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};
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/* {{{ zend_user_it_get_iterator */
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static zend_object_iterator *zend_user_it_get_iterator(zend_class_entry *ce, zval *object, int by_ref TSRMLS_DC)
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{
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zend_user_iterator *iterator;
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if (by_ref) {
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zend_error(E_ERROR, "An iterator cannot be used with foreach by reference");
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}
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iterator = emalloc(sizeof(zend_user_iterator));
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zend_iterator_init((zend_object_iterator*)iterator TSRMLS_CC);
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ZVAL_COPY(&iterator->it.data, object);
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iterator->it.funcs = ce->iterator_funcs.funcs;
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iterator->ce = Z_OBJCE_P(object);
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ZVAL_UNDEF(&iterator->value);
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return (zend_object_iterator*)iterator;
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}
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/* }}} */
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/* {{{ zend_user_it_get_new_iterator */
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ZEND_API zend_object_iterator *zend_user_it_get_new_iterator(zend_class_entry *ce, zval *object, int by_ref TSRMLS_DC)
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{
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zval iterator;
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zend_object_iterator *new_iterator;
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zend_class_entry *ce_it;
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zend_user_it_new_iterator(ce, object, &iterator TSRMLS_CC);
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ce_it = (Z_TYPE(iterator) == IS_OBJECT &&
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Z_OBJ_HT(iterator)->get_class_entry) ? Z_OBJCE(iterator) : NULL;
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if (!ce_it || !ce_it->get_iterator || (ce_it->get_iterator == zend_user_it_get_new_iterator && Z_OBJ(iterator) == Z_OBJ_P(object))) {
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if (!EG(exception)) {
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zend_throw_exception_ex(NULL, 0 TSRMLS_CC, "Objects returned by %s::getIterator() must be traversable or implement interface Iterator", ce ? ce->name->val : Z_OBJCE_P(object)->name->val);
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}
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zval_ptr_dtor(&iterator);
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return NULL;
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}
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new_iterator = ce_it->get_iterator(ce_it, &iterator, by_ref TSRMLS_CC);
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zval_ptr_dtor(&iterator);
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return new_iterator;
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}
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/* }}} */
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/* {{{ zend_implement_traversable */
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static int zend_implement_traversable(zend_class_entry *interface, zend_class_entry *class_type TSRMLS_DC)
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{
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/* check that class_type is traversable at c-level or implements at least one of 'aggregate' and 'Iterator' */
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zend_uint i;
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if (class_type->get_iterator || (class_type->parent && class_type->parent->get_iterator)) {
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return SUCCESS;
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}
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for (i = 0; i < class_type->num_interfaces; i++) {
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if (class_type->interfaces[i] == zend_ce_aggregate || class_type->interfaces[i] == zend_ce_iterator) {
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return SUCCESS;
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}
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}
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zend_error(E_CORE_ERROR, "Class %s must implement interface %s as part of either %s or %s",
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class_type->name->val,
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zend_ce_traversable->name->val,
|
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zend_ce_iterator->name->val,
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zend_ce_aggregate->name->val);
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return FAILURE;
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}
|
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/* }}} */
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/* {{{ zend_implement_aggregate */
|
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static int zend_implement_aggregate(zend_class_entry *interface, zend_class_entry *class_type TSRMLS_DC)
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{
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int i, t = -1;
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|
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if (class_type->get_iterator) {
|
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if (class_type->type == ZEND_INTERNAL_CLASS) {
|
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/* inheritance ensures the class has necessary userland methods */
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return SUCCESS;
|
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} else if (class_type->get_iterator != zend_user_it_get_new_iterator) {
|
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/* c-level get_iterator cannot be changed (exception being only Traversable is implmented) */
|
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if (class_type->num_interfaces) {
|
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for (i = 0; i < class_type->num_interfaces; i++) {
|
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if (class_type->interfaces[i] == zend_ce_iterator) {
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zend_error(E_ERROR, "Class %s cannot implement both %s and %s at the same time",
|
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class_type->name->val,
|
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interface->name->val,
|
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zend_ce_iterator->name->val);
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return FAILURE;
|
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}
|
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if (class_type->interfaces[i] == zend_ce_traversable) {
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t = i;
|
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}
|
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}
|
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}
|
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if (t == -1) {
|
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return FAILURE;
|
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}
|
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}
|
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}
|
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class_type->iterator_funcs.zf_new_iterator = NULL;
|
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class_type->get_iterator = zend_user_it_get_new_iterator;
|
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return SUCCESS;
|
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}
|
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/* }}} */
|
|
|
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/* {{{ zend_implement_iterator */
|
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static int zend_implement_iterator(zend_class_entry *interface, zend_class_entry *class_type TSRMLS_DC)
|
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{
|
|
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 */
|
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return SUCCESS;
|
|
} else {
|
|
/* c-level get_iterator cannot be changed */
|
|
if (class_type->get_iterator == zend_user_it_get_new_iterator) {
|
|
zend_error(E_ERROR, "Class %s cannot implement both %s and %s at the same time",
|
|
class_type->name->val,
|
|
interface->name->val,
|
|
zend_ce_aggregate->name->val);
|
|
}
|
|
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 TSRMLS_DC)
|
|
{
|
|
#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, zend_uint *buf_len, zend_serialize_data *data TSRMLS_DC)
|
|
{
|
|
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 TSRMLS_CC, "%s::serialize() must return a string or NULL", ce->name->val);
|
|
}
|
|
return result;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ zend_user_unserialize */
|
|
ZEND_API int zend_user_unserialize(zval *object, zend_class_entry *ce, const unsigned char *buf, zend_uint buf_len, zend_unserialize_data *data TSRMLS_DC)
|
|
{
|
|
zval zdata;
|
|
|
|
object_init_ex(object, ce);
|
|
|
|
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, zend_uint *buf_len, zend_serialize_data *data TSRMLS_DC) /* {{{ */
|
|
{
|
|
zend_class_entry *ce = Z_OBJCE_P(object);
|
|
zend_throw_exception_ex(NULL, 0 TSRMLS_CC, "Serialization of '%s' is not allowed", ce->name->val);
|
|
return FAILURE;
|
|
}
|
|
/* }}} */
|
|
|
|
ZEND_API int zend_class_unserialize_deny(zval *object, zend_class_entry *ce, const unsigned char *buf, zend_uint buf_len, zend_unserialize_data *data TSRMLS_DC) /* {{{ */
|
|
{
|
|
zend_throw_exception_ex(NULL, 0 TSRMLS_CC, "Unserialization of '%s' is not allowed", ce->name->val);
|
|
return FAILURE;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ zend_implement_serializable */
|
|
static int zend_implement_serializable(zend_class_entry *interface, zend_class_entry *class_type TSRMLS_DC)
|
|
{
|
|
if (class_type->parent
|
|
&& (class_type->parent->serialize || class_type->parent->unserialize)
|
|
&& !instanceof_function_ex(class_type->parent, zend_ce_serializable, 1 TSRMLS_CC)) {
|
|
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)
|
|
{NULL, NULL, NULL}
|
|
};
|
|
|
|
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)
|
|
{NULL, NULL, NULL}
|
|
};
|
|
|
|
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)
|
|
{NULL, NULL, NULL}
|
|
};
|
|
|
|
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)
|
|
{NULL, NULL, NULL}
|
|
};
|
|
/* }}} */
|
|
|
|
#define REGISTER_ITERATOR_INTERFACE(class_name, class_name_str) \
|
|
{\
|
|
zend_class_entry ce;\
|
|
INIT_CLASS_ENTRY(ce, # class_name_str, zend_funcs_ ## class_name) \
|
|
zend_ce_ ## class_name = zend_register_internal_interface(&ce TSRMLS_CC);\
|
|
zend_ce_ ## class_name->interface_gets_implemented = zend_implement_ ## class_name;\
|
|
}
|
|
|
|
#define REGISTER_ITERATOR_IMPLEMENT(class_name, interface_name) \
|
|
zend_class_implements(zend_ce_ ## class_name TSRMLS_CC, 1, zend_ce_ ## interface_name)
|
|
|
|
/* {{{ zend_register_interfaces */
|
|
ZEND_API void zend_register_interfaces(TSRMLS_D)
|
|
{
|
|
REGISTER_ITERATOR_INTERFACE(traversable, Traversable);
|
|
|
|
REGISTER_ITERATOR_INTERFACE(aggregate, IteratorAggregate);
|
|
REGISTER_ITERATOR_IMPLEMENT(aggregate, traversable);
|
|
|
|
REGISTER_ITERATOR_INTERFACE(iterator, Iterator);
|
|
REGISTER_ITERATOR_IMPLEMENT(iterator, traversable);
|
|
|
|
REGISTER_ITERATOR_INTERFACE(arrayaccess, ArrayAccess);
|
|
|
|
REGISTER_ITERATOR_INTERFACE(serializable, Serializable)
|
|
}
|
|
/* }}} */
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*/
|