/**
* Create named accessor property with given name, attributes, getter and setter.
*
* @return pointer to newly created property
*/
ecma_property_t *
ecma_create_named_accessor_property (ecma_object_t *object_p, /**< object */
ecma_string_t *name_p, /**< property name */
ecma_object_t *get_p, /**< getter */
ecma_object_t *set_p, /**< setter */
bool is_enumerable, /**< 'enumerable' attribute */
bool is_configurable) /**< 'configurable' attribute */
{
JERRY_ASSERT (object_p != NULL && name_p != NULL);
JERRY_ASSERT (ecma_find_named_property (object_p, name_p) == NULL);
uint8_t type_and_flags = ECMA_PROPERTY_TYPE_NAMEDACCESSOR;
if (is_configurable)
{
type_and_flags = (uint8_t) (type_and_flags | ECMA_PROPERTY_FLAG_CONFIGURABLE);
}
if (is_enumerable)
{
type_and_flags = (uint8_t) (type_and_flags | ECMA_PROPERTY_FLAG_ENUMERABLE);
}
name_p = ecma_copy_or_ref_ecma_string (name_p);
ecma_property_t *property_p = ecma_create_property (object_p, name_p, type_and_flags);
/*
* Should be performed after linking the property into object's property list, because the setters assert that.
*/
ecma_set_named_accessor_property_getter (object_p, property_p, get_p);
ecma_set_named_accessor_property_setter (object_p, property_p, set_p);
ecma_lcache_invalidate (object_p, name_p, NULL);
return property_p;
} /* ecma_create_named_accessor_property */
/**
* 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 */
/**
* 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 */
/**
* [[DefineOwnProperty]] ecma general object's operation
*
* See also:
* ECMA-262 v5, 8.6.2; ECMA-262 v5, Table 8
* ECMA-262 v5, 8.12.9
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value
*/
ecma_completion_value_t
ecma_op_general_object_define_own_property (ecma_object_t *obj_p, /**< the object */
ecma_string_t *property_name_p, /**< property name */
const ecma_property_descriptor_t *property_desc_p, /**< property
* descriptor */
bool is_throw) /**< flag that controls failure handling */
{
JERRY_ASSERT (obj_p != NULL
&& !ecma_is_lexical_environment (obj_p));
JERRY_ASSERT (property_name_p != NULL);
const bool is_property_desc_generic_descriptor = (!property_desc_p->is_value_defined
&& !property_desc_p->is_writable_defined
&& !property_desc_p->is_get_defined
&& !property_desc_p->is_set_defined);
const bool is_property_desc_data_descriptor = (property_desc_p->is_value_defined
|| property_desc_p->is_writable_defined);
const bool is_property_desc_accessor_descriptor = (property_desc_p->is_get_defined
|| property_desc_p->is_set_defined);
// 1.
ecma_property_t *current_p = ecma_op_object_get_own_property (obj_p, property_name_p);
// 2.
bool extensible = ecma_get_object_extensible (obj_p);
if (current_p == NULL)
{
// 3.
if (!extensible)
{
return ecma_reject (is_throw);
}
// 4.
// a.
if (is_property_desc_generic_descriptor
|| is_property_desc_data_descriptor)
{
ecma_property_t *new_prop_p = ecma_create_named_data_property (obj_p,
property_name_p,
property_desc_p->is_writable,
property_desc_p->is_enumerable,
property_desc_p->is_configurable);
ecma_named_data_property_assign_value (obj_p, new_prop_p, property_desc_p->value);
}
else
{
// b.
JERRY_ASSERT (is_property_desc_accessor_descriptor);
ecma_create_named_accessor_property (obj_p,
property_name_p,
property_desc_p->get_p,
property_desc_p->set_p,
property_desc_p->is_enumerable,
property_desc_p->is_configurable);
}
return ecma_make_simple_completion_value (ECMA_SIMPLE_VALUE_TRUE);
}
// 5.
if (is_property_desc_generic_descriptor
&& !property_desc_p->is_enumerable_defined
&& !property_desc_p->is_configurable_defined)
{
return ecma_make_simple_completion_value (ECMA_SIMPLE_VALUE_TRUE);
}
// 6.
const bool is_current_data_descriptor = (current_p->type == ECMA_PROPERTY_NAMEDDATA);
const bool is_current_accessor_descriptor = (current_p->type == ECMA_PROPERTY_NAMEDACCESSOR);
JERRY_ASSERT (is_current_data_descriptor || is_current_accessor_descriptor);
bool is_every_field_in_desc_also_occurs_in_current_desc_with_same_value = true;
if (property_desc_p->is_value_defined)
{
if (!is_current_data_descriptor
|| !ecma_op_same_value (property_desc_p->value,
ecma_get_named_data_property_value (current_p)))
{
is_every_field_in_desc_also_occurs_in_current_desc_with_same_value = false;
}
}
if (property_desc_p->is_writable_defined)
{
if (!is_current_data_descriptor
|| property_desc_p->is_writable != ecma_is_property_writable (current_p))
{
is_every_field_in_desc_also_occurs_in_current_desc_with_same_value = false;
}
}
if (property_desc_p->is_get_defined)
{
if (!is_current_accessor_descriptor
|| property_desc_p->get_p != ecma_get_named_accessor_property_getter (current_p))
{
is_every_field_in_desc_also_occurs_in_current_desc_with_same_value = false;
}
}
if (property_desc_p->is_set_defined)
{
if (!is_current_accessor_descriptor
|| property_desc_p->set_p != ecma_get_named_accessor_property_setter (current_p))
{
is_every_field_in_desc_also_occurs_in_current_desc_with_same_value = false;
}
}
if (property_desc_p->is_enumerable_defined)
{
if (property_desc_p->is_enumerable != ecma_is_property_enumerable (current_p))
{
is_every_field_in_desc_also_occurs_in_current_desc_with_same_value = false;
}
}
if (property_desc_p->is_configurable_defined)
{
if (property_desc_p->is_configurable != ecma_is_property_configurable (current_p))
{
is_every_field_in_desc_also_occurs_in_current_desc_with_same_value = false;
}
}
if (is_every_field_in_desc_also_occurs_in_current_desc_with_same_value)
{
return ecma_make_simple_completion_value (ECMA_SIMPLE_VALUE_TRUE);
}
// 7.
if (!ecma_is_property_configurable (current_p))
{
if (property_desc_p->is_configurable
|| (property_desc_p->is_enumerable_defined
&& property_desc_p->is_enumerable != ecma_is_property_enumerable (current_p)))
{
// a., b.
return ecma_reject (is_throw);
}
}
// 8.
if (is_property_desc_generic_descriptor)
{
// no action required
}
else if (is_property_desc_data_descriptor != is_current_data_descriptor)
{
// 9.
if (!ecma_is_property_configurable (current_p))
{
// a.
return ecma_reject (is_throw);
}
bool was_enumerable = ecma_is_property_enumerable (current_p);
bool was_configurable = ecma_is_property_configurable (current_p);
ecma_delete_property (obj_p, current_p);
if (is_current_data_descriptor)
{
// b.
current_p = ecma_create_named_accessor_property (obj_p,
property_name_p,
NULL,
NULL,
was_enumerable,
was_configurable);
}
else
{
// c.
current_p = ecma_create_named_data_property (obj_p,
property_name_p,
false,
was_enumerable,
was_configurable);
}
}
else if (is_property_desc_data_descriptor && is_current_data_descriptor)
{
// 10.
if (!ecma_is_property_configurable (current_p))
{
// a.
if (!ecma_is_property_writable (current_p))
{
// i.
if (property_desc_p->is_writable)
{
return ecma_reject (is_throw);
}
// ii.
if (property_desc_p->is_value_defined
&& !ecma_op_same_value (property_desc_p->value,
ecma_get_named_data_property_value (current_p)))
{
return ecma_reject (is_throw);
}
}
}
}
else
{
JERRY_ASSERT (is_property_desc_accessor_descriptor && is_current_accessor_descriptor);
// 11.
if (!ecma_is_property_configurable (current_p))
{
// a.
if ((property_desc_p->is_get_defined
&& property_desc_p->get_p != ecma_get_named_accessor_property_getter (current_p))
|| (property_desc_p->is_set_defined
&& property_desc_p->set_p != ecma_get_named_accessor_property_setter (current_p)))
{
// i., ii.
return ecma_reject (is_throw);
}
}
}
// 12.
if (property_desc_p->is_value_defined)
{
JERRY_ASSERT (current_p->type == ECMA_PROPERTY_NAMEDDATA);
ecma_named_data_property_assign_value (obj_p, current_p, property_desc_p->value);
}
if (property_desc_p->is_writable_defined)
{
JERRY_ASSERT (current_p->type == ECMA_PROPERTY_NAMEDDATA);
ecma_set_property_writable_attr (current_p, property_desc_p->is_writable);
}
if (property_desc_p->is_get_defined)
{
JERRY_ASSERT (current_p->type == ECMA_PROPERTY_NAMEDACCESSOR);
ecma_set_named_accessor_property_getter (obj_p, current_p, property_desc_p->get_p);
}
if (property_desc_p->is_set_defined)
{
JERRY_ASSERT (current_p->type == ECMA_PROPERTY_NAMEDACCESSOR);
ecma_set_named_accessor_property_setter (obj_p, current_p, property_desc_p->set_p);
}
if (property_desc_p->is_enumerable_defined)
{
ecma_set_property_enumerable_attr (current_p, property_desc_p->is_enumerable);
}
if (property_desc_p->is_configurable_defined)
{
ecma_set_property_configurable_attr (current_p, property_desc_p->is_configurable);
}
return ecma_make_simple_completion_value (ECMA_SIMPLE_VALUE_TRUE);
} /* ecma_op_general_object_define_own_property */
/**
* [[DefineOwnProperty]] ecma general object's operation
*
* See also:
* ECMA-262 v5, 8.6.2; ECMA-262 v5, Table 8
* ECMA-262 v5, 8.12.9
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_op_general_object_define_own_property (ecma_object_t *obj_p, /**< the object */
ecma_string_t *property_name_p, /**< property name */
const ecma_property_descriptor_t *property_desc_p, /**< property
* descriptor */
bool is_throw) /**< flag that controls failure handling */
{
JERRY_ASSERT (obj_p != NULL
&& !ecma_is_lexical_environment (obj_p));
JERRY_ASSERT (property_name_p != NULL);
ecma_property_types_t property_desc_type = ECMA_PROPERTY_TYPE_GENERIC;
if (property_desc_p->is_value_defined
|| property_desc_p->is_writable_defined)
{
/* A property descriptor cannot be both named data and named accessor. */
JERRY_ASSERT (!property_desc_p->is_get_defined
&& !property_desc_p->is_set_defined);
property_desc_type = ECMA_PROPERTY_TYPE_NAMEDDATA;
}
else if (property_desc_p->is_get_defined
|| property_desc_p->is_set_defined)
{
property_desc_type = ECMA_PROPERTY_TYPE_NAMEDACCESSOR;
}
/* These three asserts ensures that a new property is created with the appropriate default flags.
* E.g. if is_configurable_defined is false, the newly created property must be non-configurable. */
JERRY_ASSERT (property_desc_p->is_configurable_defined || !property_desc_p->is_configurable);
JERRY_ASSERT (property_desc_p->is_enumerable_defined || !property_desc_p->is_enumerable);
JERRY_ASSERT (property_desc_p->is_writable_defined || !property_desc_p->is_writable);
// 1.
ecma_property_t *current_p = ecma_op_object_get_own_property (obj_p, property_name_p);
if (current_p == NULL)
{
// 3.
if (!ecma_get_object_extensible (obj_p))
{
// 2.
return ecma_reject (is_throw);
}
// 4.
if (property_desc_type != ECMA_PROPERTY_TYPE_NAMEDACCESSOR)
{
// a.
JERRY_ASSERT (property_desc_type == ECMA_PROPERTY_TYPE_GENERIC
|| property_desc_type == ECMA_PROPERTY_TYPE_NAMEDDATA);
ecma_property_t *new_prop_p = ecma_create_named_data_property (obj_p,
property_name_p,
property_desc_p->is_writable,
property_desc_p->is_enumerable,
property_desc_p->is_configurable);
JERRY_ASSERT (property_desc_p->is_value_defined
|| ecma_is_value_undefined (property_desc_p->value));
ecma_named_data_property_assign_value (obj_p, new_prop_p, property_desc_p->value);
}
else
{
// b.
ecma_create_named_accessor_property (obj_p,
property_name_p,
property_desc_p->get_p,
property_desc_p->set_p,
property_desc_p->is_enumerable,
property_desc_p->is_configurable);
}
return ecma_make_simple_value (ECMA_SIMPLE_VALUE_TRUE);
}
// 6.
ecma_property_types_t current_property_type = ECMA_PROPERTY_GET_TYPE (current_p);
const bool is_current_configurable = ecma_is_property_configurable (current_p);
JERRY_ASSERT (current_property_type == ECMA_PROPERTY_TYPE_NAMEDDATA
|| current_property_type == ECMA_PROPERTY_TYPE_NAMEDACCESSOR);
// 7. a., b.
if (!is_current_configurable
&& (property_desc_p->is_configurable
|| (property_desc_p->is_enumerable_defined
&& (property_desc_p->is_enumerable != ecma_is_property_enumerable (current_p)))))
{
return ecma_reject (is_throw);
}
// 8.
if (property_desc_type == ECMA_PROPERTY_TYPE_GENERIC)
{
/* No action required. */
}
else if (likely (property_desc_type == current_property_type))
{
/* If property is configurable, there is no need for checks. */
if (unlikely (!is_current_configurable))
{
if (property_desc_type == ECMA_PROPERTY_TYPE_NAMEDDATA)
{
// 10. a. i. & ii.
if (!ecma_is_property_writable (current_p)
&& (property_desc_p->is_writable
|| (property_desc_p->is_value_defined
&& !ecma_op_same_value (property_desc_p->value,
ecma_get_named_data_property_value (current_p)))))
{
return ecma_reject (is_throw);
}
}
else
{
// 11.
// a.
if ((property_desc_p->is_get_defined
&& property_desc_p->get_p != ecma_get_named_accessor_property_getter (current_p))
|| (property_desc_p->is_set_defined
&& property_desc_p->set_p != ecma_get_named_accessor_property_setter (current_p)))
{
// i., ii.
return ecma_reject (is_throw);
}
}
}
}
else
{
// 9.
if (!is_current_configurable)
{
// a.
return ecma_reject (is_throw);
}
/* The following implementation can be optimized by directly overwriting
* the fields of current_p if this code path is performance critical. */
bool was_enumerable = ecma_is_property_enumerable (current_p);
ecma_delete_property (obj_p, current_p);
if (property_desc_type == ECMA_PROPERTY_TYPE_NAMEDACCESSOR)
{
// b.
current_p = ecma_create_named_accessor_property (obj_p,
property_name_p,
NULL,
NULL,
was_enumerable,
true);
}
else
{
// c.
current_p = ecma_create_named_data_property (obj_p,
property_name_p,
false,
was_enumerable,
true);
}
}
// 12.
if (property_desc_type == ECMA_PROPERTY_TYPE_NAMEDDATA)
{
JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (current_p) == ECMA_PROPERTY_TYPE_NAMEDDATA);
if (property_desc_p->is_value_defined)
{
ecma_named_data_property_assign_value (obj_p, current_p, property_desc_p->value);
}
if (property_desc_p->is_writable_defined)
{
ecma_set_property_writable_attr (current_p, property_desc_p->is_writable);
}
}
else if (property_desc_type == ECMA_PROPERTY_TYPE_NAMEDACCESSOR)
{
JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (current_p) == ECMA_PROPERTY_TYPE_NAMEDACCESSOR);
if (property_desc_p->is_get_defined)
{
ecma_set_named_accessor_property_getter (obj_p, current_p, property_desc_p->get_p);
}
if (property_desc_p->is_set_defined)
{
ecma_set_named_accessor_property_setter (obj_p, current_p, property_desc_p->set_p);
}
}
if (property_desc_p->is_enumerable_defined)
{
ecma_set_property_enumerable_attr (current_p, property_desc_p->is_enumerable);
}
if (property_desc_p->is_configurable_defined)
{
ecma_set_property_configurable_attr (current_p, property_desc_p->is_configurable);
}
return ecma_make_simple_value (ECMA_SIMPLE_VALUE_TRUE);
} /* ecma_op_general_object_define_own_property */
