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https://github.com/jerryscript-project/jerryscript.git
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e11c499b4b
The following stucture was highly frequented in the code base: - Get a builtin object // This operation increases the reference count of the object - Use it for create a new object - Deref the builtin object After a builtin has been instantiated there is always at least one reference to "keep it alive", so increase/decrease the reference count for getting the value only is unnecessary. JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
132 lines
5.2 KiB
C
132 lines
5.2 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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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_value_t prim_value = ecma_make_magic_string_value (LIT_MAGIC_STRING__EMPTY);
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if (arguments_list_len > 0)
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{
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prim_value = ecma_op_to_string (arguments_list_p[0]);
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if (ECMA_IS_VALUE_ERROR (prim_value))
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{
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return prim_value;
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}
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JERRY_ASSERT (ecma_is_value_string (prim_value));
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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_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.u.value = prim_value;
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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.u.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), 0);
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ecma_deref_ecma_string (name_p);
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}
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ecma_append_to_values_collection (for_non_enumerable_p,
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ecma_make_magic_string_value (LIT_MAGIC_STRING_LENGTH),
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0);
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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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