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377 lines
11 KiB
C
377 lines
11 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2008 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: Christian Seiler <chris_se@gmx.net> |
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| Dmitry Stogov <dmitry@zend.com> |
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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_closures.h"
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#include "zend_objects.h"
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#include "zend_objects_API.h"
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#include "zend_globals.h"
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#define ZEND_INVOKE_FUNC_NAME "__invoke"
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#define ZEND_CLOSURE_PRINT_NAME "Closure object"
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#define ZEND_CLOSURE_PROPERTY_ERROR() \
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zend_error(E_ERROR, "Closure object cannot have properties")
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typedef struct _zend_closure {
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zend_object std;
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zend_function func;
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zval *this_ptr;
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zend_function *invoke;
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} zend_closure;
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static zend_class_entry *zend_ce_closure;
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static zend_object_handlers closure_handlers;
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ZEND_METHOD(Closure, __invoke) /* {{{ */
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{
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zval ***arguments;
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zval *closure_result_ptr = NULL;
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arguments = emalloc(sizeof(zval**) * ZEND_NUM_ARGS());
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if (zend_get_parameters_array_ex(ZEND_NUM_ARGS(), arguments) == FAILURE) {
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efree(arguments);
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zend_error(E_ERROR, "Cannot get arguments for calling closure");
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RETURN_FALSE;
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}
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if (call_user_function_ex(CG(function_table), NULL, this_ptr, &closure_result_ptr, ZEND_NUM_ARGS(), arguments, 1, NULL TSRMLS_CC) == FAILURE) {
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efree(arguments);
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RETURN_FALSE;
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}
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efree(arguments);
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if (closure_result_ptr) {
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if (Z_ISREF_P(closure_result_ptr) && return_value_ptr) {
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if (return_value) {
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zval_ptr_dtor(&return_value);
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}
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*return_value_ptr = closure_result_ptr;
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} else {
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RETVAL_ZVAL(closure_result_ptr, 1, 1);
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}
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}
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}
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/* }}} */
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const static zend_function_entry closure_functions[] = { /* {{{ */
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ZEND_ME(Closure, __invoke, NULL, 0)
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{NULL, NULL, NULL}
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};
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/* }}} */
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static zend_function *zend_closure_get_constructor(zval *object TSRMLS_DC) /* {{{ */
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{
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zend_error(E_ERROR, "Instantiation of 'Closure' is not allowed");
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return NULL;
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}
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/* }}} */
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static int zend_closure_compare_objects(zval *o1, zval *o2 TSRMLS_DC) /* {{{ */
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{
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return (Z_OBJ_HANDLE_P(o1) != Z_OBJ_HANDLE_P(o2));
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}
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/* }}} */
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static int zend_closure_cast_object_tostring(zval *readobj, zval *writeobj, int type TSRMLS_DC) /* {{{ */
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{
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zend_class_entry *ce;
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switch (type) {
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case IS_STRING:
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INIT_PZVAL(writeobj);
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ZVAL_STRINGL(writeobj, ZEND_CLOSURE_PRINT_NAME, sizeof(ZEND_CLOSURE_PRINT_NAME)-1, 1);
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return SUCCESS;
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default:
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ce = Z_OBJCE_P(readobj);
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zend_error(E_NOTICE, "Object of class %s could not be converted to %s", ce->name, zend_get_type_by_const(type));
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INIT_PZVAL(writeobj);
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Z_TYPE_P(writeobj) = IS_NULL;
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break;
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}
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return FAILURE;
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}
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/* }}} */
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static zend_function *zend_closure_get_method(zval **object_ptr, char *method_name, int method_len TSRMLS_DC) /* {{{ */
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{
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char *lc_name;
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ALLOCA_FLAG(use_heap)
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lc_name = do_alloca(method_len + 1, use_heap);
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zend_str_tolower_copy(lc_name, method_name, method_len);
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if ((method_len == sizeof(ZEND_INVOKE_FUNC_NAME)-1) &&
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memcmp(lc_name, ZEND_INVOKE_FUNC_NAME, sizeof(ZEND_INVOKE_FUNC_NAME)-1) == 0) {
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zend_closure *closure = (zend_closure *)zend_object_store_get_object(*object_ptr TSRMLS_CC);
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if (!closure->invoke) {
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closure->invoke = (zend_function*)emalloc(sizeof(zend_function));
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closure->invoke->common = closure->func.common;
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closure->invoke->type = ZEND_INTERNAL_FUNCTION;
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closure->invoke->internal_function.handler = ZEND_MN(Closure___invoke);
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closure->invoke->internal_function.module = 0;
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closure->invoke->internal_function.scope = zend_ce_closure;
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closure->invoke->internal_function.function_name = ZEND_INVOKE_FUNC_NAME;
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}
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free_alloca(lc_name, use_heap);
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return (zend_function *)closure->invoke;
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}
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free_alloca(lc_name, use_heap);
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return NULL;
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}
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/* }}} */
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static zval *zend_closure_read_property(zval *object, zval *member, int type TSRMLS_DC) /* {{{ */
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{
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ZEND_CLOSURE_PROPERTY_ERROR();
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return NULL;
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}
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/* }}} */
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static void zend_closure_write_property(zval *object, zval *member, zval *value TSRMLS_DC) /* {{{ */
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{
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ZEND_CLOSURE_PROPERTY_ERROR();
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}
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/* }}} */
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static zval **zend_closure_get_property_ptr_ptr(zval *object, zval *member TSRMLS_DC) /* {{{ */
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{
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ZEND_CLOSURE_PROPERTY_ERROR();
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return NULL;
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}
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/* }}} */
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static int zend_closure_has_property(zval *object, zval *member, int has_set_exists TSRMLS_DC) /* {{{ */
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{
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ZEND_CLOSURE_PROPERTY_ERROR();
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return 0;
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}
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/* }}} */
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static void zend_closure_unset_property(zval *object, zval *member TSRMLS_DC) /* {{{ */
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{
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ZEND_CLOSURE_PROPERTY_ERROR();
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}
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/* }}} */
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static void zend_closure_free_storage(void *object TSRMLS_DC) /* {{{ */
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{
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zend_closure *closure = (zend_closure *)object;
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zend_object_std_dtor(&closure->std TSRMLS_CC);
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if (closure->func.type == ZEND_USER_FUNCTION) {
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zend_execute_data *ex = EG(current_execute_data);
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while (ex) {
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if (ex->op_array == &closure->func.op_array) {
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zend_error(E_ERROR, "Cannot destroy active lambda function");
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}
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ex = ex->prev_execute_data;
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}
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destroy_op_array(&closure->func.op_array TSRMLS_CC);
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}
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if (closure->this_ptr) {
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zval_ptr_dtor(&closure->this_ptr);
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}
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if (closure->invoke) {
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efree(closure->invoke);
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}
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efree(closure);
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}
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/* }}} */
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static zend_object_value zend_closure_new(zend_class_entry *class_type TSRMLS_DC) /* {{{ */
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{
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zend_closure *closure;
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zend_object_value object;
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closure = emalloc(sizeof(zend_closure));
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memset(closure, 0, sizeof(zend_closure));
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zend_object_std_init(&closure->std, class_type TSRMLS_CC);
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object.handle = zend_objects_store_put(closure, (zend_objects_store_dtor_t)zend_objects_destroy_object, (zend_objects_free_object_storage_t) zend_closure_free_storage, NULL TSRMLS_CC);
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object.handlers = &closure_handlers;
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return object;
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}
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/* }}} */
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void zend_register_closure_ce(TSRMLS_D) /* {{{ */
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{
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zend_class_entry ce;
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INIT_CLASS_ENTRY(ce, "Closure", closure_functions);
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zend_ce_closure = zend_register_internal_class(&ce TSRMLS_CC);
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zend_ce_closure->ce_flags |= ZEND_ACC_FINAL_CLASS;
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zend_ce_closure->create_object = zend_closure_new;
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memcpy(&closure_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
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closure_handlers.get_constructor = zend_closure_get_constructor;
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closure_handlers.get_method = zend_closure_get_method;
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closure_handlers.write_property = zend_closure_write_property;
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closure_handlers.read_property = zend_closure_read_property;
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closure_handlers.get_property_ptr_ptr = zend_closure_get_property_ptr_ptr;
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closure_handlers.has_property = zend_closure_has_property;
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closure_handlers.unset_property = zend_closure_unset_property;
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closure_handlers.compare_objects = zend_closure_compare_objects;
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closure_handlers.cast_object = zend_closure_cast_object_tostring;
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closure_handlers.clone_obj = NULL;
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}
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/* }}} */
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static int zval_copy_static_var(zval **p, int num_args, va_list args, zend_hash_key *key) /* {{{ */
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{
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HashTable *target = va_arg(args, HashTable*);
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zend_bool is_ref;
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if (Z_TYPE_PP(p) & (IS_LEXICAL_VAR|IS_LEXICAL_REF)) {
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TSRMLS_FETCH();
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is_ref = Z_TYPE_PP(p) & IS_LEXICAL_REF;
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if (!EG(active_symbol_table)) {
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zend_rebuild_symbol_table(TSRMLS_C);
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}
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if (zend_hash_quick_find(EG(active_symbol_table), key->arKey, key->nKeyLength, key->h, (void **) &p) == FAILURE) {
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if (is_ref) {
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zval *tmp;
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ALLOC_INIT_ZVAL(tmp);
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Z_SET_ISREF_P(tmp);
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zend_hash_quick_add(EG(active_symbol_table), key->arKey, key->nKeyLength, key->h, &tmp, sizeof(zval*), (void**)&p);
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} else {
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p = &EG(uninitialized_zval_ptr);
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zend_error(E_NOTICE,"Undefined variable: %s", key->arKey);
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}
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} else {
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if (is_ref) {
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SEPARATE_ZVAL_TO_MAKE_IS_REF(p);
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} else if (Z_ISREF_PP(p)) {
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SEPARATE_ZVAL(p);
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}
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}
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}
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if (zend_hash_quick_add(target, key->arKey, key->nKeyLength, key->h, p, sizeof(zval*), NULL) == SUCCESS) {
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Z_ADDREF_PP(p);
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}
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return ZEND_HASH_APPLY_KEEP;
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}
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/* }}} */
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ZEND_API void zend_create_closure(zval *res, zend_function *func, zend_class_entry *scope, zval *this_ptr TSRMLS_DC) /* {{{ */
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{
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zend_closure *closure;
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object_init_ex(res, zend_ce_closure);
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closure = (zend_closure *)zend_object_store_get_object(res TSRMLS_CC);
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closure->func = *func;
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if (closure->func.type == ZEND_USER_FUNCTION) {
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if (closure->func.op_array.static_variables) {
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HashTable *static_variables = closure->func.op_array.static_variables;
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ALLOC_HASHTABLE(closure->func.op_array.static_variables);
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zend_hash_init(closure->func.op_array.static_variables, zend_hash_num_elements(static_variables), NULL, ZVAL_PTR_DTOR, 0);
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zend_hash_apply_with_arguments(static_variables, (apply_func_args_t)zval_copy_static_var, 1, closure->func.op_array.static_variables);
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}
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(*closure->func.op_array.refcount)++;
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}
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closure->func.common.scope = scope;
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if (scope) {
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closure->func.common.fn_flags |= ZEND_ACC_PUBLIC;
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if (this_ptr && (closure->func.common.fn_flags & ZEND_ACC_STATIC) == 0) {
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closure->this_ptr = this_ptr;
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Z_ADDREF_P(this_ptr);
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} else {
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closure->this_ptr = NULL;
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}
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} else {
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closure->this_ptr = NULL;
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}
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}
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/* }}} */
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ZEND_API int zend_get_closure(zval *obj, zend_class_entry **ce_ptr, zend_function **fptr_ptr, zval **zobj_ptr, zval ***zobj_ptr_ptr TSRMLS_DC) /* {{{ */
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{
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if (Z_TYPE_P(obj) == IS_OBJECT) {
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zend_class_entry *ce = Z_OBJCE_P(obj);
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if (ce == zend_ce_closure) {
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zend_closure *closure = (zend_closure *)zend_object_store_get_object(obj TSRMLS_CC);
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*fptr_ptr = &closure->func;
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if (closure->this_ptr) {
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if (zobj_ptr) {
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*zobj_ptr = closure->this_ptr;
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}
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if (zobj_ptr_ptr) {
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*zobj_ptr_ptr = &closure->this_ptr;
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}
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*ce_ptr = Z_OBJCE_P(closure->this_ptr);
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} else {
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if (zobj_ptr) {
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*zobj_ptr = NULL;
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}
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if (zobj_ptr_ptr) {
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*zobj_ptr_ptr = NULL;
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}
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*ce_ptr = closure->func.common.scope;
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}
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return SUCCESS;
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} else if (zend_hash_find(&ce->function_table, ZEND_INVOKE_FUNC_NAME, sizeof(ZEND_INVOKE_FUNC_NAME), (void**)fptr_ptr) == SUCCESS) {
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*ce_ptr = ce;
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if ((*fptr_ptr)->common.fn_flags & ZEND_ACC_STATIC) {
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if (zobj_ptr) {
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*zobj_ptr = NULL;
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}
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if (zobj_ptr_ptr) {
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*zobj_ptr_ptr = NULL;
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}
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} else {
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if (zobj_ptr) {
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*zobj_ptr = obj;
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}
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if (zobj_ptr_ptr) {
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*zobj_ptr_ptr = NULL;
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}
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}
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return SUCCESS;
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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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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* indent-tabs-mode: t
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* End:
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*/
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