mirror of
https://github.com/jerryscript-project/jerryscript.git
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130 lines
4.8 KiB
C++
130 lines
4.8 KiB
C++
/* Copyright 2015 Samsung Electronics Co., Ltd.
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* Copyright 2015 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-builtin-helpers.h"
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#include "ecma-builtins.h"
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#include "ecma-conversion.h"
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#include "ecma-exceptions.h"
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#include "ecma-helpers.h"
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#include "ecma-objects.h"
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/** \addtogroup ecma ECMA
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* @{
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*
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* \addtogroup ecmabuiltinhelpers ECMA builtin helper operations
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* @{
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*/
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/**
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* Common implementation of the Object.prototype.toString routine
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*
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* See also:
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* ECMA-262 v5, 15.2.4.2
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*
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* Used by:
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* - The Object.prototype.toString routine.
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* - The Array.prototype.toString routine as fallback.
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*
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* @return completion value
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* Returned value must be freed with ecma_free_completion_value.
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*/
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ecma_completion_value_t
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ecma_builtin_helper_object_to_string (const ecma_value_t this_arg) /**< this argument */
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{
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ecma_magic_string_id_t type_string;
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if (ecma_is_value_undefined (this_arg))
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{
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type_string = ECMA_MAGIC_STRING_UNDEFINED_UL;
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}
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else if (ecma_is_value_null (this_arg))
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{
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type_string = ECMA_MAGIC_STRING_NULL_UL;
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}
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else
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{
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ecma_completion_value_t obj_this = ecma_op_to_object (this_arg);
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if (!ecma_is_completion_value_normal (obj_this))
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{
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return obj_this;
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}
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JERRY_ASSERT (ecma_is_value_object (ecma_get_completion_value_value (obj_this)));
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ecma_object_t *obj_p = ecma_get_object_from_completion_value (obj_this);
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ecma_property_t *class_prop_p = ecma_get_internal_property (obj_p,
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ECMA_INTERNAL_PROPERTY_CLASS);
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type_string = (ecma_magic_string_id_t) class_prop_p->u.internal_property.value;
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ecma_free_completion_value (obj_this);
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}
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ecma_string_t *ret_string_p;
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/* Building string "[object #type#]" where type is 'Undefined',
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'Null' or one of possible object's classes.
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The string with null character is maximum 19 characters long. */
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const ssize_t buffer_size = 19;
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MEM_DEFINE_LOCAL_ARRAY (str_buffer, buffer_size, ecma_char_t);
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const ecma_char_t *left_square_zt_str_p = ecma_get_magic_string_zt (ECMA_MAGIC_STRING_LEFT_SQUARE_CHAR);
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const ecma_char_t *object_zt_str_p = ecma_get_magic_string_zt (ECMA_MAGIC_STRING_OBJECT);
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const ecma_char_t *space_zt_str_p = ecma_get_magic_string_zt (ECMA_MAGIC_STRING_SPACE_CHAR);
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const ecma_char_t *type_name_zt_str_p = ecma_get_magic_string_zt (type_string);
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const ecma_char_t *right_square_zt_str_p = ecma_get_magic_string_zt (ECMA_MAGIC_STRING_RIGHT_SQUARE_CHAR);
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ecma_char_t *buffer_ptr = str_buffer;
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ssize_t buffer_size_left = buffer_size;
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buffer_ptr = ecma_copy_zt_string_to_buffer (left_square_zt_str_p,
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buffer_ptr,
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buffer_size_left);
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buffer_size_left = buffer_size - (buffer_ptr - str_buffer) * (ssize_t) sizeof (ecma_char_t);
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buffer_ptr = ecma_copy_zt_string_to_buffer (object_zt_str_p,
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buffer_ptr,
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buffer_size_left);
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buffer_size_left = buffer_size - (buffer_ptr - str_buffer) * (ssize_t) sizeof (ecma_char_t);
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buffer_ptr = ecma_copy_zt_string_to_buffer (space_zt_str_p,
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buffer_ptr,
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buffer_size_left);
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buffer_size_left = buffer_size - (buffer_ptr - str_buffer) * (ssize_t) sizeof (ecma_char_t);
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buffer_ptr = ecma_copy_zt_string_to_buffer (type_name_zt_str_p,
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buffer_ptr,
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buffer_size_left);
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buffer_size_left = buffer_size - (buffer_ptr - str_buffer) * (ssize_t) sizeof (ecma_char_t);
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buffer_ptr = ecma_copy_zt_string_to_buffer (right_square_zt_str_p,
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buffer_ptr,
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buffer_size_left);
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buffer_size_left = buffer_size - (buffer_ptr - str_buffer) * (ssize_t) sizeof (ecma_char_t);
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JERRY_ASSERT (buffer_size_left >= 0);
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ret_string_p = ecma_new_ecma_string (str_buffer);
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MEM_FINALIZE_LOCAL_ARRAY (str_buffer);
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return ecma_make_normal_completion_value (ecma_make_string_value (ret_string_p));
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} /* ecma_builtin_helper_object_to_string */
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/**
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* @}
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* @}
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* @}
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*/
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