/**
 * Helper function for increase or decrease the remaining count.
 *
 * @return the current remaining count after increase or decrease.
 */
static ecma_length_t
ecma_builtin_promise_remaining_inc_or_dec (ecma_value_t remaining, /**< the remaining count */
                                           bool is_inc) /**< whether to increase the count */
{
  JERRY_ASSERT (ecma_is_value_object (remaining));

  ecma_object_t *remaining_p = ecma_get_object_from_value (remaining);
  ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) remaining_p;

  JERRY_ASSERT (ext_object_p->u.class_prop.class_id == LIT_MAGIC_STRING_NUMBER_UL);

  JERRY_ASSERT (ecma_is_value_integer_number (ext_object_p->u.class_prop.u.value));

  ecma_length_t current = (ecma_length_t) ecma_get_integer_from_value (ext_object_p->u.class_prop.u.value);

  if (is_inc)
  {
    current++;
  }
  else
  {
    current--;
  }

  ext_object_p->u.class_prop.u.value = ecma_make_uint32_value (current);

  return current;
} /* ecma_builtin_promise_remaining_inc_or_dec */
Ejemplo n.º 2
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/**
 * ToString operation.
 *
 * See also:
 *          ECMA-262 v5, 9.8
 *
 * @return ecma value
 *         Returned value must be freed with ecma_free_value
 */
ecma_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_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);

    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_integer_number (value))
    {
      ecma_integer_value_t num = ecma_get_integer_from_value (value);

      if (num < 0)
      {
        res_p = ecma_new_ecma_string_from_number ((ecma_number_t) num);
      }
      else
      {
        res_p = ecma_new_ecma_string_from_uint32 ((uint32_t) num);
      }
    }
    else if (ecma_is_value_float_number (value))
    {
      ecma_number_t num = ecma_get_float_from_value (value);
      res_p = ecma_new_ecma_string_from_number (num);
    }
    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_string_value (res_p);
  }
} /* ecma_op_to_string */
/**
 * Runtime Semantics: PerformPromiseRace.
 *
 * See also:
 *         ES2015 25.4.4.3.1
 *
 * @return ecma value of the new promise.
 *         Returned value must be freed with ecma_free_value.
 */
inline static ecma_value_t
ecma_builtin_promise_do_race (ecma_value_t array, /**< the array for race */
                              ecma_value_t capability, /**< PromiseCapability record */
                              ecma_value_t ctor) /**< the caller of Promise.race */
{
  JERRY_ASSERT (ecma_is_value_object (capability)
                && ecma_is_value_object (array)
                && ecma_is_value_object (ctor));
  JERRY_ASSERT (ecma_get_object_builtin_id (ecma_get_object_from_value (ctor)) == ECMA_BUILTIN_ID_PROMISE);
  JERRY_ASSERT (ecma_get_object_type (ecma_get_object_from_value (array)) == ECMA_OBJECT_TYPE_ARRAY);

  ecma_value_t ret = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
  ecma_string_t *magic_string_length_p = ecma_new_ecma_length_string ();
  ecma_object_t *array_p = ecma_get_object_from_value (array);
  ecma_value_t len_value = ecma_op_object_get (array_p, magic_string_length_p);
  ecma_deref_ecma_string (magic_string_length_p);
  ecma_length_t len = (ecma_length_t) ecma_get_integer_from_value (len_value);
  ecma_fast_free_value (len_value);

  ecma_string_t *str_promise = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_PROMISE);
  ecma_string_t *str_resolve = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_RESOLVE);
  ecma_string_t *str_reject = ecma_new_ecma_string_from_uint32 (ECMA_PROMISE_PROPERTY_REJECT);

  ecma_value_t resolve = ecma_op_object_get (ecma_get_object_from_value (capability),
                                             str_resolve);
  ecma_value_t reject = ecma_op_object_get (ecma_get_object_from_value (capability),
                                            str_reject);

  for (ecma_length_t index = 0; index <= len; index++)
  {
    /* b-d. */
    if (index == len)
    {
      ret = ecma_op_object_get (ecma_get_object_from_value (capability), str_promise);
      break;
    }

    /* e. */
    ecma_string_t *str_index = ecma_new_ecma_string_from_uint32 (index);
    ecma_value_t array_item = ecma_op_object_get (array_p, str_index);
    ecma_deref_ecma_string (str_index);

    /* h. */
    ecma_value_t next_promise = ecma_builtin_promise_resolve (ctor, array_item);
    ecma_free_value (array_item);

    /* i. */
    if (ECMA_IS_VALUE_ERROR (next_promise))
    {
      ret = next_promise;
      break;
    }

    /* j. */
    ecma_value_t then_result = ecma_promise_then (next_promise, resolve, reject);
    ecma_free_value (next_promise);

    /* k. */
    if (ECMA_IS_VALUE_ERROR (then_result))
    {
      ret = then_result;
      break;
    }

    ecma_free_value (then_result);
  }

  ecma_free_value (reject);
  ecma_free_value (resolve);
  ecma_deref_ecma_string (str_promise);
  ecma_deref_ecma_string (str_resolve);
  ecma_deref_ecma_string (str_reject);

  JERRY_ASSERT (!ecma_is_value_empty (ret));

  return ret;
} /* ecma_builtin_promise_do_race */