mirror of
https://github.com/jerryscript-project/jerryscript.git
synced 2025-12-15 16:29:21 +00:00
d60d4dbba9
Remove unnecessary ref / deref calls when magic strings are used. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
134 lines
5.2 KiB
C
134 lines
5.2 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "ecma-alloc.h"
|
|
#include "ecma-builtins.h"
|
|
#include "ecma-exceptions.h"
|
|
#include "ecma-gc.h"
|
|
#include "ecma-globals.h"
|
|
#include "ecma-helpers.h"
|
|
#include "ecma-objects.h"
|
|
#include "ecma-objects-general.h"
|
|
#include "ecma-string-object.h"
|
|
|
|
/** \addtogroup ecma ECMA
|
|
* @{
|
|
*
|
|
* \addtogroup ecmastringobject ECMA String object related routines
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* String object creation operation.
|
|
*
|
|
* See also: ECMA-262 v5, 15.5.2.1
|
|
*
|
|
* @return ecma value
|
|
* Returned value must be freed with ecma_free_value
|
|
*/
|
|
ecma_value_t
|
|
ecma_op_create_string_object (const ecma_value_t *arguments_list_p, /**< list of arguments that
|
|
are passed to String constructor */
|
|
ecma_length_t arguments_list_len) /**< length of the arguments' list */
|
|
{
|
|
JERRY_ASSERT (arguments_list_len == 0
|
|
|| arguments_list_p != NULL);
|
|
|
|
ecma_value_t prim_value = ecma_make_magic_string_value (LIT_MAGIC_STRING__EMPTY);
|
|
|
|
if (arguments_list_len > 0)
|
|
{
|
|
prim_value = ecma_op_to_string (arguments_list_p[0]);
|
|
|
|
if (ECMA_IS_VALUE_ERROR (prim_value))
|
|
{
|
|
return prim_value;
|
|
}
|
|
|
|
JERRY_ASSERT (ecma_is_value_string (prim_value));
|
|
}
|
|
|
|
#ifndef CONFIG_DISABLE_STRING_BUILTIN
|
|
ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_STRING_PROTOTYPE);
|
|
#else /* CONFIG_DISABLE_STRING_BUILTIN */
|
|
ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_OBJECT_PROTOTYPE);
|
|
#endif /* !CONFIG_DISABLE_STRING_BUILTIN */
|
|
|
|
ecma_object_t *object_p = ecma_create_object (prototype_obj_p,
|
|
sizeof (ecma_extended_object_t),
|
|
ECMA_OBJECT_TYPE_CLASS);
|
|
|
|
ecma_deref_object (prototype_obj_p);
|
|
|
|
ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;
|
|
ext_object_p->u.class_prop.class_id = LIT_MAGIC_STRING_STRING_UL;
|
|
ext_object_p->u.class_prop.u.value = prim_value;
|
|
|
|
return ecma_make_object_value (object_p);
|
|
} /* ecma_op_create_string_object */
|
|
|
|
/**
|
|
* List names of a String object's lazy instantiated properties
|
|
*
|
|
* @return string values collection
|
|
*/
|
|
void
|
|
ecma_op_string_list_lazy_property_names (ecma_object_t *obj_p, /**< a String object */
|
|
bool separate_enumerable, /**< true - list enumerable properties
|
|
* into main collection,
|
|
* and non-enumerable to collection of
|
|
* 'skipped non-enumerable' properties,
|
|
* false - list all properties into main
|
|
* collection.
|
|
*/
|
|
ecma_collection_header_t *main_collection_p, /**< 'main'
|
|
* collection */
|
|
ecma_collection_header_t *non_enum_collection_p) /**< skipped
|
|
* 'non-enumerable'
|
|
* collection */
|
|
{
|
|
JERRY_ASSERT (ecma_get_object_type (obj_p) == ECMA_OBJECT_TYPE_CLASS);
|
|
|
|
ecma_collection_header_t *for_enumerable_p = main_collection_p;
|
|
|
|
ecma_collection_header_t *for_non_enumerable_p = separate_enumerable ? non_enum_collection_p : main_collection_p;
|
|
|
|
ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) obj_p;
|
|
JERRY_ASSERT (ext_object_p->u.class_prop.class_id == LIT_MAGIC_STRING_STRING_UL);
|
|
|
|
ecma_string_t *prim_value_str_p = ecma_get_string_from_value (ext_object_p->u.class_prop.u.value);
|
|
|
|
ecma_length_t length = ecma_string_get_length (prim_value_str_p);
|
|
|
|
for (ecma_length_t i = 0; i < length; i++)
|
|
{
|
|
ecma_string_t *name_p = ecma_new_ecma_string_from_uint32 (i);
|
|
|
|
/* the properties are enumerable (ECMA-262 v5, 15.5.5.2.9) */
|
|
ecma_append_to_values_collection (for_enumerable_p, ecma_make_string_value (name_p), 0);
|
|
|
|
ecma_deref_ecma_string (name_p);
|
|
}
|
|
|
|
ecma_append_to_values_collection (for_non_enumerable_p,
|
|
ecma_make_magic_string_value (LIT_MAGIC_STRING_LENGTH),
|
|
0);
|
|
} /* ecma_op_string_list_lazy_property_names */
|
|
|
|
/**
|
|
* @}
|
|
* @}
|
|
*/
|