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Improve array length setting. (#1393)

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The new set does not allocate memory when the size of the array is reduced.
Furthermore the [[PutObject]] method directly calls the new length setter.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2016-10-19 09:45:17 +02:00
committed by yichoi
parent a130059c8b
commit 3ce48be152
5 changed files with 332 additions and 295 deletions
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jerry-core/ecma/operations/ecma-array-object.h
+17
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@@ -25,9 +25,26 @@
* @{
*/
/**
* Flags for ecma_op_array_object_set_length
*/
typedef enum
{
ECMA_ARRAY_OBJECT_SET_LENGTH_FLAG_IS_THROW = 1u << 0, /**< is_throw flag is set */
ECMA_ARRAY_OBJECT_SET_LENGTH_FLAG_REJECT = 1u << 1, /**< reject later because the descriptor flags
* contains an unallowed combination */
ECMA_ARRAY_OBJECT_SET_LENGTH_FLAG_WRITABLE_DEFINED = 1u << 2, /**< writable flag defined
* in the property descriptor */
ECMA_ARRAY_OBJECT_SET_LENGTH_FLAG_WRITABLE = 1u << 3, /**< writable flag enabled
* in the property descriptor */
} ecma_array_object_set_length_flags_t;
extern ecma_value_t
ecma_op_create_array_object (const ecma_value_t *, ecma_length_t, bool);
extern ecma_value_t
ecma_op_array_object_set_length (ecma_object_t *, ecma_value_t, uint32_t);
extern ecma_value_t
ecma_op_array_object_define_own_property (ecma_object_t *, ecma_string_t *, const ecma_property_descriptor_t *, bool);