/* Copyright 2015 Samsung Electronics Co., Ltd.
 * Copyright 2015 University of Szeged.
 *
 * 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-builtin-helpers.h"

#include "ecma-builtins.h"
#include "ecma-conversion.h"
#include "ecma-function-object.h"
#include "ecma-exceptions.h"
#include "ecma-helpers.h"
#include "ecma-objects.h"
#include "ecma-try-catch-macro.h"

/** \addtogroup ecma ECMA
 * @{
 *
 * \addtogroup ecmabuiltinhelpers ECMA builtin helper operations
 * @{
 */

/**
 * Common implementation of the Object.prototype.toString routine
 *
 * See also:
 *          ECMA-262 v5, 15.2.4.2
 *
 * Used by:
 *         - The Object.prototype.toString routine.
 *         - The Array.prototype.toString routine as fallback.
 *
 * @return completion value
 *         Returned value must be freed with ecma_free_completion_value.
 */

ecma_completion_value_t
ecma_builtin_helper_object_to_string (const ecma_value_t this_arg) /**< this argument */
{
  ecma_magic_string_id_t type_string;

  if (ecma_is_value_undefined (this_arg))
  {
    type_string = ECMA_MAGIC_STRING_UNDEFINED_UL;
  }
  else if (ecma_is_value_null (this_arg))
  {
    type_string = ECMA_MAGIC_STRING_NULL_UL;
  }
  else
  {
    ecma_completion_value_t obj_this = ecma_op_to_object (this_arg);

    if (!ecma_is_completion_value_normal (obj_this))
    {
      return obj_this;
    }

    JERRY_ASSERT (ecma_is_value_object (ecma_get_completion_value_value (obj_this)));

    ecma_object_t *obj_p = ecma_get_object_from_completion_value (obj_this);

    type_string = ecma_object_get_class_name (obj_p);

    ecma_free_completion_value (obj_this);
  }

  ecma_string_t *ret_string_p;

  /* Building string "[object #type#]" where type is 'Undefined',
     'Null' or one of possible object's classes.
     The string with null character is maximum 19 characters long. */
  const ssize_t buffer_size = 19;
  MEM_DEFINE_LOCAL_ARRAY (str_buffer, buffer_size, ecma_char_t);

  const ecma_char_t *left_square_zt_str_p = ecma_get_magic_string_zt (ECMA_MAGIC_STRING_LEFT_SQUARE_CHAR);
  const ecma_char_t *object_zt_str_p = ecma_get_magic_string_zt (ECMA_MAGIC_STRING_OBJECT);
  const ecma_char_t *space_zt_str_p = ecma_get_magic_string_zt (ECMA_MAGIC_STRING_SPACE_CHAR);
  const ecma_char_t *type_name_zt_str_p = ecma_get_magic_string_zt (type_string);
  const ecma_char_t *right_square_zt_str_p = ecma_get_magic_string_zt (ECMA_MAGIC_STRING_RIGHT_SQUARE_CHAR);

  ecma_char_t *buffer_ptr = str_buffer;
  ssize_t buffer_size_left = buffer_size;
  buffer_ptr = ecma_copy_zt_string_to_buffer (left_square_zt_str_p,
                                              buffer_ptr,
                                              buffer_size_left);
  buffer_size_left = buffer_size - (buffer_ptr - str_buffer) * (ssize_t) sizeof (ecma_char_t);
  buffer_ptr = ecma_copy_zt_string_to_buffer (object_zt_str_p,
                                              buffer_ptr,
                                              buffer_size_left);
  buffer_size_left = buffer_size - (buffer_ptr - str_buffer) * (ssize_t) sizeof (ecma_char_t);
  buffer_ptr = ecma_copy_zt_string_to_buffer (space_zt_str_p,
                                              buffer_ptr,
                                              buffer_size_left);
  buffer_size_left = buffer_size - (buffer_ptr - str_buffer) * (ssize_t) sizeof (ecma_char_t);
  buffer_ptr = ecma_copy_zt_string_to_buffer (type_name_zt_str_p,
                                              buffer_ptr,
                                              buffer_size_left);
  buffer_size_left = buffer_size - (buffer_ptr - str_buffer) * (ssize_t) sizeof (ecma_char_t);
  buffer_ptr = ecma_copy_zt_string_to_buffer (right_square_zt_str_p,
                                              buffer_ptr,
                                              buffer_size_left);
  buffer_size_left = buffer_size - (buffer_ptr - str_buffer) * (ssize_t) sizeof (ecma_char_t);

  JERRY_ASSERT (buffer_size_left >= 0);

  ret_string_p = ecma_new_ecma_string (str_buffer);

  MEM_FINALIZE_LOCAL_ARRAY (str_buffer);

  return ecma_make_normal_completion_value (ecma_make_string_value (ret_string_p));
} /* ecma_builtin_helper_object_to_string */

/**
 * The Array.prototype's 'toLocaleString' single element operation routine
 *
 * See also:
 *          ECMA-262 v5, 15.4.4.3 steps 6-8 and 10.b-d
 *
 * @return completion value
 *         Returned value must be freed with ecma_free_completion_value.
 */
ecma_completion_value_t
ecma_builtin_helper_get_to_locale_string_at_index (ecma_object_t *obj_p, /** < this object */
                                                   uint32_t index) /** < array index */
{
  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();
  ecma_string_t *index_string_p = ecma_new_ecma_string_from_uint32 (index);

  ECMA_TRY_CATCH (index_value,
                  ecma_op_object_get (obj_p, index_string_p),
                  ret_value);

  if (ecma_is_value_undefined (index_value) || ecma_is_value_null (index_value))
  {
    ecma_string_t *return_string_p = ecma_get_magic_string (ECMA_MAGIC_STRING__EMPTY);
    ret_value = ecma_make_normal_completion_value (ecma_make_string_value (return_string_p));
  }
  else
  {
    ECMA_TRY_CATCH (index_obj_value,
                    ecma_op_to_object (index_value),
                    ret_value);

    ecma_object_t *index_obj_p = ecma_get_object_from_value (index_obj_value);
    ecma_string_t *locale_string_magic_string_p = ecma_get_magic_string (ECMA_MAGIC_STRING_TO_LOCALE_STRING_UL);

    ECMA_TRY_CATCH (to_locale_value,
                    ecma_op_object_get (index_obj_p, locale_string_magic_string_p),
                    ret_value);

    if (ecma_op_is_callable (to_locale_value))
    {
      ecma_object_t *locale_func_obj_p = ecma_get_object_from_value (to_locale_value);
      ret_value = ecma_op_function_call (locale_func_obj_p,
                                         ecma_make_object_value (index_obj_p),
                                         NULL,
                                         0);
    }
    else
    {
      ret_value = ecma_make_throw_obj_completion_value (ecma_new_standard_error (ECMA_ERROR_TYPE));
    }

    ECMA_FINALIZE (to_locale_value);

    ecma_deref_ecma_string (locale_string_magic_string_p);

    ECMA_FINALIZE (index_obj_value);
  }

  ECMA_FINALIZE (index_value);

  ecma_deref_ecma_string (index_string_p);

  return ret_value;
} /* ecma_builtin_helper_get_to_locale_string_at_index */

/**
 * @}
 * @}
 * @}
 */