/**
 * The String.prototype object's 'concat' routine
 *
 * See also:
 *          ECMA-262 v5, 15.5.4.6
 *
 * @return completion value
 *         Returned value must be freed with ecma_free_completion_value.
 */
static ecma_completion_value_t
ecma_builtin_string_prototype_object_concat (ecma_value_t this_arg, /**< this argument */
                                             const ecma_value_t* argument_list_p, /**< arguments list */
                                             ecma_length_t arguments_number) /**< number of arguments */
{
  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();

  /* 1 */
  ECMA_TRY_CATCH (check_coercible_val,
                  ecma_op_check_object_coercible (this_arg),
                  ret_value);

  /* 2 */
  ECMA_TRY_CATCH (to_string_val,
                  ecma_op_to_string (this_arg),
                  ret_value);

  /* 3 */
  // No copy performed

  /* 4 */
  ecma_string_t *string_to_return = ecma_copy_or_ref_ecma_string (ecma_get_string_from_value (to_string_val));

  /* 5 */
  for (uint32_t arg_index = 0;
       arg_index < arguments_number && ecma_is_completion_value_empty (ret_value);
       ++arg_index)
  {
    /* 5a */
    /* 5b */
    ecma_string_t *string_temp = string_to_return;

    ECMA_TRY_CATCH (get_arg_string,
                    ecma_op_to_string (argument_list_p[arg_index]),
                    ret_value);

    string_to_return = ecma_concat_ecma_strings (string_to_return, ecma_get_string_from_value (get_arg_string));

    ecma_deref_ecma_string (string_temp);

    ECMA_FINALIZE (get_arg_string);
  }

  /* 6 */
  if (ecma_is_completion_value_empty (ret_value))
  {
    ret_value = ecma_make_normal_completion_value (ecma_make_string_value (string_to_return));
  }
  else
  {
    ecma_deref_ecma_string (string_to_return);
  }

  ECMA_FINALIZE (to_string_val);
  ECMA_FINALIZE (check_coercible_val);

  return ret_value;
} /* ecma_builtin_string_prototype_object_concat */

/**
 * Helper function for string indexOf and lastIndexOf functions
 *
 * This function implements string indexOf and lastIndexOf with required checks and conversions.
 *
 * See also:
 *          ECMA-262 v5, 15.5.4.7
 *          ECMA-262 v5, 15.5.4.8
 *
 * Used by:
 *         - The String.prototype.indexOf routine.
 *         - The String.prototype.lastIndexOf routine.
 *
 * @return uint32_t - (last) index of search string
 */
ecma_value_t
ecma_builtin_helper_string_prototype_object_index_of (ecma_value_t this_arg, /**< this argument */
                                                      ecma_value_t arg1, /**< routine's first argument */
                                                      ecma_value_t arg2, /**< routine's second argument */
                                                      bool first_index) /**< routine's third argument */
{
  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);

  /* 1 */
  ECMA_TRY_CATCH (check_coercible_val,
                  ecma_op_check_object_coercible (this_arg),
                  ret_value);

  /* 2 */
  ECMA_TRY_CATCH (to_str_val,
                  ecma_op_to_string (this_arg),
                  ret_value);

  /* 3 */
  ECMA_TRY_CATCH (search_str_val,
                  ecma_op_to_string (arg1),
                  ret_value);

  /* 4 */
  ECMA_OP_TO_NUMBER_TRY_CATCH (pos_num,
                               arg2,
                               ret_value);

  /* 5 (indexOf) -- 6 (lastIndexOf) */
  ecma_string_t *original_str_p = ecma_get_string_from_value (to_str_val);
  const ecma_length_t original_len = ecma_string_get_length (original_str_p);

  /* 4b, 6 (indexOf) - 4b, 5, 7 (lastIndexOf) */
  ecma_length_t start = ecma_builtin_helper_string_index_normalize (pos_num, original_len, first_index);

  /* 7 (indexOf) -- 8 (lastIndexOf) */
  ecma_string_t *search_str_p = ecma_get_string_from_value (search_str_val);

  ecma_number_t ret_num = ECMA_NUMBER_MINUS_ONE;

  /* 8 (indexOf) -- 9 (lastIndexOf) */
  ecma_length_t index_of = 0;
  if (ecma_builtin_helper_string_find_index (original_str_p, search_str_p, first_index, start, &index_of))
  {
    ret_num = ((ecma_number_t) index_of);
  }

  ret_value = ecma_make_number_value (ret_num);

  ECMA_OP_TO_NUMBER_FINALIZE (pos_num);
  ECMA_FINALIZE (search_str_val);
  ECMA_FINALIZE (to_str_val);
  ECMA_FINALIZE (check_coercible_val);

  return ret_value;
} /* ecma_builtin_helper_string_prototype_object_index_of */

/**
 * The Object.prototype object's 'hasOwnProperty' routine
 *
 * See also:
 *          ECMA-262 v5, 15.2.4.5
 *
 * @return ecma value
 *         Returned value must be freed with ecma_free_value.
 */
static ecma_value_t
ecma_builtin_object_prototype_object_has_own_property (ecma_value_t this_arg, /**< this argument */
                                                       ecma_value_t arg) /**< first argument */
{
  ecma_value_t return_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);

  /* 1. */
  ECMA_TRY_CATCH (to_string_val,
                  ecma_op_to_string (arg),
                  return_value);

  /* 2. */
  ECMA_TRY_CATCH (obj_val,
                  ecma_op_to_object (this_arg),
                  return_value);

  ecma_string_t *property_name_string_p = ecma_get_string_from_value (to_string_val);

  ecma_object_t *obj_p = ecma_get_object_from_value (obj_val);

  /* 3. */
  return_value = ecma_make_boolean_value (ecma_op_object_has_own_property (obj_p, property_name_string_p));

  ECMA_FINALIZE (obj_val);

  ECMA_FINALIZE (to_string_val);

  return return_value;
} /* ecma_builtin_object_prototype_object_has_own_property */

/**
 * 'in' opcode handler.
 *
 * See also: ECMA-262 v5, 11.8.7
 *
 * @return ecma value
 *         returned value must be freed with ecma_free_value.
 */
ecma_value_t
opfunc_in (ecma_value_t left_value, /**< left value */
           ecma_value_t right_value) /**< right value */
{
  if (!ecma_is_value_object (right_value))
  {
    return ecma_raise_type_error (ECMA_ERR_MSG ("Expected an object in 'in' check."));
  }

  bool to_string = !ecma_is_value_string (left_value);

  if (to_string)
  {
    left_value = ecma_op_to_string (left_value);

    if (ECMA_IS_VALUE_ERROR (left_value))
    {
      return left_value;
    }
  }

  ecma_string_t *left_value_prop_name_p = ecma_get_string_from_value (left_value);
  ecma_object_t *right_value_obj_p = ecma_get_object_from_value (right_value);

  ecma_value_t result = ecma_make_boolean_value (ecma_op_object_has_property (right_value_obj_p,
                                                                              left_value_prop_name_p));

  if (to_string)
  {
    ecma_free_value (left_value);
  }
  return result;
} /* opfunc_in */

/**
 * Handle calling [[Call]] of a built-in error object
 *
 * @return ecma value
 */
ecma_value_t
ecma_builtin_helper_error_dispatch_call (ecma_standard_error_t error_type, /**< native error type */
                                         const ecma_value_t *arguments_list_p, /**< arguments list */
                                         ecma_length_t arguments_list_len) /**< number of arguments */
{
  JERRY_ASSERT (arguments_list_len == 0 || arguments_list_p != NULL);

  if (arguments_list_len != 0
      && !ecma_is_value_undefined (arguments_list_p[0]))
  {
    ecma_value_t ret_value = ECMA_VALUE_EMPTY;

    ECMA_TRY_CATCH (msg_str_value,
                    ecma_op_to_string (arguments_list_p[0]),
                    ret_value);

    ecma_string_t *message_string_p = ecma_get_string_from_value (msg_str_value);
    ecma_object_t *new_error_object_p = ecma_new_standard_error_with_message (error_type,
                                                                              message_string_p);
    ret_value = ecma_make_object_value (new_error_object_p);

    ECMA_FINALIZE (msg_str_value);

    return ret_value;
  }
  else
  {
    ecma_object_t *new_error_object_p = ecma_new_standard_error (error_type);

    return ecma_make_object_value (new_error_object_p);
  }
} /* ecma_builtin_helper_error_dispatch_call */

/**
 * Free the ecma value
 */
void
ecma_free_value (ecma_value_t value) /**< value description */
{
  switch (ecma_get_value_type_field (value))
  {
    case ECMA_TYPE_SIMPLE:
    {
      /* doesn't hold additional memory */
      break;
    }

    case ECMA_TYPE_NUMBER:
    {
      ecma_number_t *number_p = ecma_get_number_from_value (value);
      ecma_dealloc_number (number_p);
      break;
    }

    case ECMA_TYPE_STRING:
    {
      ecma_string_t *string_p = ecma_get_string_from_value (value);
      ecma_deref_ecma_string (string_p);
      break;
    }

    case ECMA_TYPE_OBJECT:
    {
      ecma_deref_object (ecma_get_object_from_value (value));
      break;
    }
  }
} /* ecma_free_value */

/**
 * 'in' opcode handler.
 *
 * See also: ECMA-262 v5, 11.8.7
 *
 * @return ecma value
 *         returned value must be freed with ecma_free_value.
 */
ecma_value_t
opfunc_in (ecma_value_t left_value, /**< left value */
           ecma_value_t right_value) /**< right value */
{
  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);

  if (!ecma_is_value_object (right_value))
  {
    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
  }
  else
  {
    ECMA_TRY_CATCH (str_left_value, ecma_op_to_string (left_value), ret_value);

    ecma_string_t *left_value_prop_name_p = ecma_get_string_from_value (str_left_value);
    ecma_object_t *right_value_obj_p = ecma_get_object_from_value (right_value);

    if (ecma_op_object_get_property (right_value_obj_p, left_value_prop_name_p) != NULL)
    {
      ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_TRUE);
    }
    else
    {
      ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_FALSE);
    }

    ECMA_FINALIZE (str_left_value);
  }

  return ret_value;
} /* opfunc_in */

/**
 * Handle calling [[Call]] of built-in SyntaxError object
 *
 * @return ecma value
 */
ecma_value_t
ecma_builtin_syntax_error_dispatch_call (const ecma_value_t *arguments_list_p, /**< arguments list */
                                         ecma_length_t arguments_list_len) /**< number of arguments */
{
  JERRY_ASSERT (arguments_list_len == 0 || arguments_list_p != NULL);

  if (arguments_list_len != 0
      && !ecma_is_value_undefined (arguments_list_p[0]))
  {
    ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);

    ECMA_TRY_CATCH (msg_str_value,
                    ecma_op_to_string (arguments_list_p[0]),
                    ret_value);

    ecma_string_t *message_string_p = ecma_get_string_from_value (msg_str_value);
    ecma_object_t *new_error_object_p = ecma_new_standard_error_with_message (ECMA_ERROR_SYNTAX,
                                                                              message_string_p);
    ret_value = ecma_make_object_value (new_error_object_p);

    ECMA_FINALIZE (msg_str_value);

    return ret_value;
  }
  else
  {
    ecma_object_t *new_error_object_p = ecma_new_standard_error (ECMA_ERROR_SYNTAX);

    return ecma_make_object_value (new_error_object_p);
  }
} /* ecma_builtin_syntax_error_dispatch_call */

/**
 * The String.prototype object's 'localeCompare' routine
 *
 * See also:
 *          ECMA-262 v5, 15.5.4.9
 *
 * @return completion value
 *         Returned value must be freed with ecma_free_completion_value.
 */
static ecma_completion_value_t
ecma_builtin_string_prototype_object_locale_compare (ecma_value_t this_arg, /**< this argument */
                                                     ecma_value_t arg) /**< routine's argument */
{
  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();

  /* 1. */
  ECMA_TRY_CATCH (this_check_coercible_val,
                  ecma_op_check_object_coercible (this_arg),
                  ret_value);

  /* 2. */
  ECMA_TRY_CATCH (this_to_string_val,
                  ecma_op_to_string (this_arg),
                  ret_value);

  /* 3. */
  ECMA_TRY_CATCH (arg_to_string_val,
                  ecma_op_to_string (arg),
                  ret_value);

  ecma_string_t *this_string_p = ecma_get_string_from_value (this_to_string_val);
  ecma_string_t *arg_string_p = ecma_get_string_from_value (arg_to_string_val);

  ecma_number_t *result_p = ecma_alloc_number ();

  if (ecma_compare_ecma_strings_relational (this_string_p, arg_string_p))
  {
    *result_p = ecma_int32_to_number (-1);
  }
  else if (!ecma_compare_ecma_strings (this_string_p, arg_string_p))
  {
    *result_p = ecma_int32_to_number (1);
  }
  else
  {
    *result_p = ecma_int32_to_number (0);
  }

  ret_value = ecma_make_normal_completion_value (ecma_make_number_value (result_p));

  ECMA_FINALIZE (arg_to_string_val);
  ECMA_FINALIZE (this_to_string_val);
  ECMA_FINALIZE (this_check_coercible_val);

  return ret_value;
} /* ecma_builtin_string_prototype_object_locale_compare */

/**
 * The Object object's 'isSealed' routine
 *
 * See also:
 *          ECMA-262 v5, 15.2.3.11
 *
 * @return completion value
 *         Returned value must be freed with ecma_free_completion_value.
 */
static ecma_completion_value_t
ecma_builtin_object_object_is_sealed (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */
                                      ecma_value_t arg) /**< routine's argument */
{
  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();

  // 1.
  if (!ecma_is_value_object (arg))
  {
    ret_value = ecma_make_throw_obj_completion_value (ecma_new_standard_error (ECMA_ERROR_TYPE));
  }
  else
  {
    ecma_object_t *obj_p = ecma_get_object_from_value (arg);

    bool is_sealed;

    // 3.
    if (ecma_get_object_extensible (obj_p))
    {
      is_sealed = false;
    }
    else
    {
      /* the value can be updated in the loop below */
      is_sealed = true;

      // 2.
      ecma_collection_header_t *props_p = ecma_op_object_get_property_names (obj_p, false, false, false);

      ecma_collection_iterator_t iter;
      ecma_collection_iterator_init (&iter, props_p);

      while (ecma_collection_iterator_next (&iter))
      {
        ecma_string_t *property_name_p = ecma_get_string_from_value (*iter.current_value_p);

        // 2.a
        ecma_property_t *property_p = ecma_op_object_get_own_property (obj_p, property_name_p);

        // 2.b
        if (ecma_is_property_configurable (property_p))
        {
          is_sealed = false;
          break;
        }
      }

      ecma_free_values_collection (props_p, true);
    }

    // 4.
    ret_value = ecma_make_simple_completion_value (is_sealed
                                                   ? ECMA_SIMPLE_VALUE_TRUE
                                                   : ECMA_SIMPLE_VALUE_FALSE);
  }

  return ret_value;
} /* ecma_builtin_object_object_is_sealed */

/**
 * Update getter or setter for object literals.
 */
void
opfunc_set_accessor (bool is_getter, /**< is getter accessor */
                     ecma_value_t object, /**< object value */
                     ecma_value_t accessor_name, /**< accessor name value */
                     ecma_value_t accessor) /**< accessor value */
{
  ecma_object_t *object_p = ecma_get_object_from_value (object);
  JERRY_ASSERT (ecma_is_value_string (accessor_name) || ecma_is_value_number (accessor_name));
  ecma_string_t *accessor_name_p = ecma_get_string_from_value (ecma_op_to_string (accessor_name));
  ecma_property_t *property_p = ecma_find_named_property (object_p, accessor_name_p);

  if (property_p != NULL
      && ECMA_PROPERTY_GET_TYPE (*property_p) != ECMA_PROPERTY_TYPE_NAMEDACCESSOR)
  {
    ecma_delete_property (object_p, ECMA_PROPERTY_VALUE_PTR (property_p));
    property_p = NULL;
  }

  if (property_p == NULL)
  {
    ecma_object_t *getter_func_p = NULL;
    ecma_object_t *setter_func_p = NULL;

    if (is_getter)
    {
      getter_func_p = ecma_get_object_from_value (accessor);
    }
    else
    {
      setter_func_p = ecma_get_object_from_value (accessor);
    }

    ecma_create_named_accessor_property (object_p,
                                         accessor_name_p,
                                         getter_func_p,
                                         setter_func_p,
                                         ECMA_PROPERTY_CONFIGURABLE_ENUMERABLE,
                                         NULL);
  }
  else if (is_getter)
  {
    ecma_object_t *getter_func_p = ecma_get_object_from_value (accessor);

    ecma_set_named_accessor_property_getter (object_p,
                                             ECMA_PROPERTY_VALUE_PTR (property_p),
                                             getter_func_p);
  }
  else
  {
    ecma_object_t *setter_func_p = ecma_get_object_from_value (accessor);

    ecma_set_named_accessor_property_setter (object_p,
                                             ECMA_PROPERTY_VALUE_PTR (property_p),
                                             setter_func_p);
  }

  ecma_deref_ecma_string (accessor_name_p);
} /* opfunc_set_accessor */

/**
 * The String.prototype object's 'charCodeAt' routine
 *
 * See also:
 *          ECMA-262 v5, 15.5.4.5
 *
 * @return completion value
 *         Returned value must be freed with ecma_free_completion_value.
 */
static ecma_completion_value_t
ecma_builtin_string_prototype_object_char_code_at (ecma_value_t this_arg, /**< this argument */
                                                   ecma_value_t arg) /**< routine's argument */
{
  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();

  /* 1 */
  ECMA_TRY_CATCH (check_coercible_val,
                  ecma_op_check_object_coercible (this_arg),
                  ret_value);

  /* 2 */
  ECMA_TRY_CATCH (to_string_val,
                  ecma_op_to_string (this_arg),
                  ret_value);

  /* 3 */
  ECMA_OP_TO_NUMBER_TRY_CATCH (index_num,
                               arg,
                               ret_value);

  /* 4 */
  ecma_string_t *original_string_p = ecma_get_string_from_value (to_string_val);
  const ecma_length_t len = ecma_string_get_length (original_string_p);

  ecma_number_t *ret_num_p = ecma_alloc_number ();

  /* 5 */
  // When index_num is NaN, then the first two comparisons are false
  if (index_num < 0 || index_num >= len || (ecma_number_is_nan (index_num) && !len))
  {
    *ret_num_p = ecma_number_make_nan ();
  }
  else
  {
    /* 6 */
    /*
     * String length is currently uit32_t, but index_num may be bigger,
     * ToInteger performs floor, while ToUInt32 performs modulo 2^32,
     * hence after the check 0 <= index_num < len we assume to_uint32 can be used.
     * We assume to_uint32 (NaN) is 0.
     */
    JERRY_ASSERT (ecma_number_is_nan (index_num) || ecma_number_to_uint32 (index_num) == ecma_number_trunc (index_num));

    ecma_char_t new_ecma_char = ecma_string_get_char_at_pos (original_string_p, ecma_number_to_uint32 (index_num));
    *ret_num_p = ecma_uint32_to_number (new_ecma_char);
  }

  ecma_value_t new_value = ecma_make_number_value (ret_num_p);
  ret_value = ecma_make_normal_completion_value (new_value);

  ECMA_OP_TO_NUMBER_FINALIZE (index_num);

  ECMA_FINALIZE (to_string_val);
  ECMA_FINALIZE (check_coercible_val);

  return ret_value;
} /* ecma_builtin_string_prototype_object_char_code_at */

/**
 * ToString operation.
 *
 * See also:
 *          ECMA-262 v5, 9.8
 *
 * @return completion value
 *         Returned value must be freed with ecma_free_completion_value
 */
ecma_completion_value_t
ecma_op_to_string (ecma_value_t value) /**< ecma-value */
{
  ecma_check_value_type_is_spec_defined (value);

  if (unlikely (ecma_is_value_object (value)))
  {
    ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();

    ECMA_TRY_CATCH (prim_value,
                    ecma_op_to_primitive (value, ECMA_PREFERRED_TYPE_STRING),
                    ret_value);

    ret_value = ecma_op_to_string (prim_value);

    ECMA_FINALIZE (prim_value);

    return ret_value;
  }
  else
  {
    ecma_string_t *res_p = NULL;

    if (ecma_is_value_string (value))
    {
      res_p = ecma_get_string_from_value (value);
      res_p = ecma_copy_or_ref_ecma_string (res_p);
    }
    else if (ecma_is_value_number (value))
    {
      ecma_number_t *num_p = ecma_get_number_from_value (value);
      res_p = ecma_new_ecma_string_from_number (*num_p);
    }
    else if (ecma_is_value_undefined (value))
    {
      res_p = ecma_get_magic_string (LIT_MAGIC_STRING_UNDEFINED);
    }
    else if (ecma_is_value_null (value))
    {
      res_p = ecma_get_magic_string (LIT_MAGIC_STRING_NULL);
    }
    else
    {
      JERRY_ASSERT (ecma_is_value_boolean (value));

      if (ecma_is_value_true (value))
      {
        res_p = ecma_get_magic_string (LIT_MAGIC_STRING_TRUE);
      }
      else
      {
        res_p = ecma_get_magic_string (LIT_MAGIC_STRING_FALSE);
      }
    }

    return ecma_make_normal_completion_value (ecma_make_string_value (res_p));
  }
} /* ecma_op_to_string */

/**
 * The String.prototype object's 'trim' routine
 *
 * See also:
 *          ECMA-262 v5, 15.5.4.20
 *
 * @return completion value
 *         Returned value must be freed with ecma_free_completion_value.
 */
static ecma_completion_value_t
ecma_builtin_string_prototype_object_trim (ecma_value_t this_arg) /**< this argument */
{
  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();

  /* 1 */
  ECMA_TRY_CATCH (check_coercible_val,
                  ecma_op_check_object_coercible (this_arg),
                  ret_value);

  /* 2 */
  ECMA_TRY_CATCH (to_string_val,
                  ecma_op_to_string (this_arg),
                  ret_value);

  ecma_string_t *original_string_p = ecma_get_string_from_value (to_string_val);

  /* 3 */
  const lit_utf8_size_t size = ecma_string_get_size (original_string_p);
  const ecma_length_t length = ecma_string_get_size (original_string_p);

  /* Workaround: avoid repeated call of ecma_string_get_char_at_pos() because its overhead */
  lit_utf8_byte_t *original_utf8_str_p = (lit_utf8_byte_t *) mem_heap_alloc_block (size + 1,
                                                                                   MEM_HEAP_ALLOC_SHORT_TERM);
  ecma_string_to_utf8_string (original_string_p, original_utf8_str_p, (ssize_t) size);

  uint32_t prefix = 0, postfix = 0;
  uint32_t new_len = 0;

  while (prefix < length && isspace (lit_utf8_string_code_unit_at (original_utf8_str_p, size, prefix)))
  {
    prefix++;
  }

  while (postfix < length - prefix && isspace (lit_utf8_string_code_unit_at (original_utf8_str_p,
                                                                             size,
                                                                             length - postfix - 1)))
  {
    postfix++;
  }

  new_len = prefix < size ? size - prefix - postfix : 0;

  ecma_string_t *new_str_p = ecma_string_substr (original_string_p, prefix, prefix + new_len);

  /* 4 */
  ret_value = ecma_make_normal_completion_value (ecma_make_string_value (new_str_p));

  mem_heap_free_block (original_utf8_str_p);

  ECMA_FINALIZE (to_string_val);
  ECMA_FINALIZE (check_coercible_val);

  return ret_value;
} /* ecma_builtin_string_prototype_object_trim */

/**
 * Update getter or setter for object literals.
 */
void
opfunc_set_accessor (bool is_getter, /**< is getter accessor */
                     ecma_value_t object, /**< object value */
                     ecma_value_t accessor_name, /**< accessor name value */
                     ecma_value_t accessor) /**< accessor value */
{
  ecma_object_t *object_p = ecma_get_object_from_value (object);
  ecma_string_t *accessor_name_p = ecma_get_string_from_value (accessor_name);
  ecma_property_t *property_p = ecma_find_named_property (object_p, accessor_name_p);

  if (property_p != NULL && property_p->type != ECMA_PROPERTY_NAMEDACCESSOR)
  {
    ecma_delete_property (object_p, property_p);
    property_p = NULL;
  }

  if (property_p == NULL)
  {
    ecma_object_t *getter_func_p = NULL;
    ecma_object_t *setter_func_p = NULL;

    if (is_getter)
    {
      getter_func_p = ecma_get_object_from_value (accessor);
    }
    else
    {
      setter_func_p = ecma_get_object_from_value (accessor);
    }

    ecma_create_named_accessor_property (object_p,
                                         accessor_name_p,
                                         getter_func_p,
                                         setter_func_p,
                                         true,
                                         true);
  }
  else if (is_getter)
  {
    ecma_object_t *getter_func_p = ecma_get_object_from_value (accessor);

    ecma_set_named_accessor_property_getter (object_p,
                                             property_p,
                                             getter_func_p);
  }
  else
  {
    ecma_object_t *setter_func_p = ecma_get_object_from_value (accessor);

    ecma_set_named_accessor_property_setter (object_p,
                                             property_p,
                                             setter_func_p);
  }
} /* opfunc_set_accessor */

/**
 * Copy ecma value.
 *
 * Note:
 *  Operation algorithm.
 *   switch (valuetype)
 *    case simple:
 *      simply return the value as it was passed;
 *    case number:
 *      copy the number
 *      and return new ecma value
 *      pointing to copy of the number;
 *    case string:
 *      increase reference counter of the string
 *      and return the value as it was passed.
 *    case object;
 *      increase reference counter of the object if do_ref_if_object is true
 *      and return the value as it was passed.
 *
 * @return See note.
 */
ecma_value_t
ecma_copy_value (ecma_value_t value, /**< ecma value */
                 bool do_ref_if_object) /**< if the value is object value,
                                             increment reference counter of the object */
{
  ecma_value_t value_copy = 0;

  switch (ecma_get_value_type_field (value))
  {
    case ECMA_TYPE_SIMPLE:
    {
      value_copy = value;

      break;
    }
    case ECMA_TYPE_NUMBER:
    {
      ecma_number_t *num_p = ecma_get_number_from_value (value);

      ecma_number_t *number_copy_p = ecma_alloc_number ();
      *number_copy_p = *num_p;

      value_copy = ecma_make_number_value (number_copy_p);

      break;
    }
    case ECMA_TYPE_STRING:
    {
      ecma_string_t *string_p = ecma_get_string_from_value (value);

      string_p = ecma_copy_or_ref_ecma_string (string_p);

      value_copy = ecma_make_string_value (string_p);

      break;
    }
    case ECMA_TYPE_OBJECT:
    {
      ecma_object_t *obj_p = ecma_get_object_from_value (value);

      if (do_ref_if_object)
      {
        ecma_ref_object (obj_p);
      }

      value_copy = value;

      break;
    }
  }

  return value_copy;
} /* ecma_copy_value */

/**
 * ToBoolean operation.
 *
 * See also:
 *          ECMA-262 v5, 9.2
 *
 * @return completion value
 *         Returned value is simple and so need not be freed.
 *         However, ecma_free_completion_value may be called for it, but it is a no-op.
 */
ecma_completion_value_t
ecma_op_to_boolean (ecma_value_t value) /**< ecma-value */
{
  ecma_check_value_type_is_spec_defined (value);

  ecma_simple_value_t ret_value;

  if (ecma_is_value_boolean (value))
  {
    ret_value = (ecma_is_value_true (value) ?
                 ECMA_SIMPLE_VALUE_TRUE : ECMA_SIMPLE_VALUE_FALSE);
  }
  else if (ecma_is_value_undefined (value)
           || ecma_is_value_null (value))
  {
    ret_value = ECMA_SIMPLE_VALUE_FALSE;
  }
  else if (ecma_is_value_number (value))
  {
    ecma_number_t *num_p = ecma_get_number_from_value (value);

    if (ecma_number_is_nan (*num_p)
        || ecma_number_is_zero (*num_p))
    {
      ret_value = ECMA_SIMPLE_VALUE_FALSE;
    }
    else
    {
      ret_value = ECMA_SIMPLE_VALUE_TRUE;
    }
  }
  else if (ecma_is_value_string (value))
  {
    ecma_string_t *str_p = ecma_get_string_from_value (value);

    if (ecma_string_get_length (str_p) == 0)
    {
      ret_value = ECMA_SIMPLE_VALUE_FALSE;
    }
    else
    {
      ret_value = ECMA_SIMPLE_VALUE_TRUE;
    }
  }
  else
  {
    JERRY_ASSERT (ecma_is_value_object (value));

    ret_value = ECMA_SIMPLE_VALUE_TRUE;
  }

  return ecma_make_simple_completion_value (ret_value);
} /* ecma_op_to_boolean */

/**
 * The RegExp.prototype object's 'exec' routine
 *
 * See also:
 *          ECMA-262 v5, 15.10.6.2
 *
 * @return array object containing the results - if the matched
 *         null                                - otherwise
 *
 *         May raise error, so returned value must be freed with ecma_free_value.
 */
static ecma_value_t
ecma_builtin_regexp_prototype_exec (ecma_value_t this_arg, /**< this argument */
                                    ecma_value_t arg) /**< routine's argument */
{
  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);

  if (!ecma_is_value_object (this_arg)
      || ecma_object_get_class_name (ecma_get_object_from_value (this_arg)) != LIT_MAGIC_STRING_REGEXP_UL)
  {
    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Incomplete RegExp type"));
  }
  else
  {
    ECMA_TRY_CATCH (obj_this, ecma_op_to_object (this_arg), ret_value);

    ECMA_TRY_CATCH (input_str_value,
                    ecma_op_to_string (arg),
                    ret_value);

    ecma_property_t *bytecode_prop_p;
    ecma_object_t *obj_p = ecma_get_object_from_value (obj_this);
    bytecode_prop_p = ecma_get_internal_property (obj_p, ECMA_INTERNAL_PROPERTY_REGEXP_BYTECODE);

    void *bytecode_p = ECMA_GET_INTERNAL_VALUE_POINTER (void, ecma_get_internal_property_value (bytecode_prop_p));

    if (bytecode_p == NULL)
    {
      /* Missing bytecode means empty RegExp: '/(?:)/', so always return empty string. */
      ecma_string_t *capture_str_p = ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY);

      ecma_value_t arguments_list[1];
      arguments_list[0] = ecma_make_string_value (capture_str_p);

      ret_value = ecma_op_create_array_object (arguments_list, 1, false);

      ecma_deref_ecma_string (capture_str_p);

      re_set_result_array_properties (ecma_get_object_from_value (ret_value),
                                      ecma_get_string_from_value (input_str_value),
                                      1,
                                      0);
    }
    else
    {
      ret_value = ecma_regexp_exec_helper (obj_this, input_str_value, false);
    }

    ECMA_FINALIZE (input_str_value);
    ECMA_FINALIZE (obj_this);
  }

  return ret_value;
} /* ecma_builtin_regexp_prototype_exec */

/**
 * Send string representation of exception to the client.
 *
 * @return true - if the data sent successfully to the debugger client,
 *         false - otherwise
 */
bool
jerry_debugger_send_exception_string (void)
{
  ecma_string_t *string_p = NULL;

  ecma_value_t exception_value = JERRY_CONTEXT (error_value);

  if (ecma_is_value_object (exception_value))
  {
    string_p = jerry_debugger_exception_object_to_string (exception_value);

    if (string_p == NULL)
    {
      string_p = ecma_get_string_from_value (ecma_builtin_helper_object_to_string (exception_value));
    }
  }
  else if (ecma_is_value_string (exception_value))
  {
    string_p = ecma_get_string_from_value (exception_value);
    ecma_ref_ecma_string (string_p);
  }
  else
  {
    exception_value = ecma_op_to_string (exception_value);
    string_p = ecma_get_string_from_value (exception_value);
  }

  ECMA_STRING_TO_UTF8_STRING (string_p, string_data_p, string_size);

  bool result = jerry_debugger_send_string (JERRY_DEBUGGER_EXCEPTION_STR,
                                            JERRY_DEBUGGER_NO_SUBTYPE,
                                            string_data_p,
                                            string_size);

  ECMA_FINALIZE_UTF8_STRING (string_data_p, string_size);

  ecma_deref_ecma_string (string_p);
  return result;
} /* jerry_debugger_send_exception_string */

/**
 * Check the string value existance in the collection.
 *
 * Used by:
 *         - ecma_builtin_json_stringify step 4.b.ii.5
 *
 * @return true, if the string is already in the collection.
 */
bool
ecma_has_string_value_in_collection (ecma_collection_header_t *collection_p, /**< collection */
                                     ecma_value_t string_value) /**< string value */
{
  JERRY_ASSERT (ecma_is_value_string (string_value));

  ecma_string_t *string_p = ecma_get_string_from_value (string_value);

  ecma_collection_iterator_t iterator;
  ecma_collection_iterator_init (&iterator, collection_p);

  while (ecma_collection_iterator_next (&iterator))
  {
    ecma_value_t value = *iterator.current_value_p;
    ecma_string_t *current_p = ecma_get_string_from_value (value);

    if (ecma_compare_ecma_strings (current_p, string_p))
    {
      return true;
    }
  }

  return false;
} /* ecma_has_string_value_in_collection*/