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https://github.com/jerryscript-project/jerryscript.git
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132477f7d5
This change allows easier access to array length which improves the performance of inserting new items into an array and there is no need to allocate length strings anymore. The trade-of is that array length cannot be cached anymore. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
144 lines
5.6 KiB
C
144 lines
5.6 KiB
C
/* Copyright 2014-2016 Samsung Electronics Co., Ltd.
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* Copyright 2016 University of Szeged.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ecma-alloc.h"
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#include "ecma-builtins.h"
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#include "ecma-exceptions.h"
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#include "ecma-gc.h"
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#include "ecma-globals.h"
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#include "ecma-helpers.h"
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#include "ecma-objects.h"
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#include "ecma-objects-general.h"
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#include "ecma-string-object.h"
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/** \addtogroup ecma ECMA
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* @{
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*
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* \addtogroup ecmastringobject ECMA String object related routines
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* @{
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*/
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/**
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* String object creation operation.
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*
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* See also: ECMA-262 v5, 15.5.2.1
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*
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* @return ecma value
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* Returned value must be freed with ecma_free_value
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*/
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ecma_value_t
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ecma_op_create_string_object (const ecma_value_t *arguments_list_p, /**< list of arguments that
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are passed to String constructor */
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ecma_length_t arguments_list_len) /**< length of the arguments' list */
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{
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JERRY_ASSERT (arguments_list_len == 0
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|| arguments_list_p != NULL);
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ecma_string_t *prim_prop_str_value_p;
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if (arguments_list_len == 0)
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{
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prim_prop_str_value_p = ecma_new_ecma_string_from_magic_string_id (LIT_MAGIC_STRING__EMPTY);
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}
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else
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{
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ecma_value_t to_str_arg_value = ecma_op_to_string (arguments_list_p[0]);
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if (ECMA_IS_VALUE_ERROR (to_str_arg_value))
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{
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return to_str_arg_value;
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}
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else
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{
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JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (to_str_arg_value));
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JERRY_ASSERT (ecma_is_value_string (to_str_arg_value));
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prim_prop_str_value_p = ecma_get_string_from_value (to_str_arg_value);
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}
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}
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#ifndef CONFIG_DISABLE_STRING_BUILTIN
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ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_STRING_PROTOTYPE);
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#else /* CONFIG_DISABLE_STRING_BUILTIN */
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ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_OBJECT_PROTOTYPE);
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#endif /* !CONFIG_DISABLE_STRING_BUILTIN */
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ecma_object_t *object_p = ecma_create_object (prototype_obj_p,
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sizeof (ecma_extended_object_t),
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ECMA_OBJECT_TYPE_CLASS);
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ecma_deref_object (prototype_obj_p);
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ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;
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ext_object_p->u.class_prop.class_id = LIT_MAGIC_STRING_STRING_UL;
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ext_object_p->u.class_prop.value = ecma_make_string_value (prim_prop_str_value_p);
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return ecma_make_object_value (object_p);
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} /* ecma_op_create_string_object */
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/**
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* List names of a String object's lazy instantiated properties
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*
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* @return string values collection
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*/
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void
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ecma_op_string_list_lazy_property_names (ecma_object_t *obj_p, /**< a String object */
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bool separate_enumerable, /**< true - list enumerable properties
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* into main collection,
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* and non-enumerable to collection of
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* 'skipped non-enumerable' properties,
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* false - list all properties into main
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* collection.
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*/
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ecma_collection_header_t *main_collection_p, /**< 'main'
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* collection */
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ecma_collection_header_t *non_enum_collection_p) /**< skipped
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* 'non-enumerable'
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* collection */
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{
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JERRY_ASSERT (ecma_get_object_type (obj_p) == ECMA_OBJECT_TYPE_CLASS);
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ecma_collection_header_t *for_enumerable_p = main_collection_p;
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ecma_collection_header_t *for_non_enumerable_p = separate_enumerable ? non_enum_collection_p : main_collection_p;
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ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) obj_p;
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JERRY_ASSERT (ext_object_p->u.class_prop.class_id == LIT_MAGIC_STRING_STRING_UL);
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ecma_string_t *prim_value_str_p = ecma_get_string_from_value (ext_object_p->u.class_prop.value);
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ecma_length_t length = ecma_string_get_length (prim_value_str_p);
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for (ecma_length_t i = 0; i < length; i++)
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{
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ecma_string_t *name_p = ecma_new_ecma_string_from_uint32 (i);
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/* the properties are enumerable (ECMA-262 v5, 15.5.5.2.9) */
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ecma_append_to_values_collection (for_enumerable_p, ecma_make_string_value (name_p), true);
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ecma_deref_ecma_string (name_p);
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}
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ecma_string_t *length_str_p = ecma_new_ecma_length_string ();
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ecma_append_to_values_collection (for_non_enumerable_p, ecma_make_string_value (length_str_p), true);
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ecma_deref_ecma_string (length_str_p);
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} /* ecma_op_string_list_lazy_property_names */
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/**
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* @}
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* @}
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*/
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