/**
* 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 */
/**
* 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 */