/*

* Array object representation, used for actual Array instances.

*

* All objects with the exotic array behavior (which must coincide with having

* internal class array) MUST be duk_harrays. No other object can be a

* duk_harray. However, duk_harrays may not always have an array part.

*/

#if !defined(DUK_HARRAY_H_INCLUDED)

#define DUK_HARRAY_H_INCLUDED

#if defined(DUK_USE_ASSERTIONS)

DUK_INTERNAL_DECL void duk_harray_assert_valid(duk_harray *h);

#define DUK_HARRAY_ASSERT_VALID(h) \

do { \

duk_harray_assert_valid((h)); \

} while (0)

#else

#define DUK_HARRAY_ASSERT_VALID(h) \

do { \

} while (0)

#endif

#define DUK_HARRAY_LENGTH_WRITABLE(h) (!(h)->length_nonwritable)

#define DUK_HARRAY_LENGTH_NONWRITABLE(h) ((h)->length_nonwritable)

#define DUK_HARRAY_SET_LENGTH_WRITABLE(h) \

do { \

(h)->length_nonwritable = 0; \

} while (0)

#define DUK_HARRAY_SET_LENGTH_NONWRITABLE(h) \

do { \

(h)->length_nonwritable = 1; \

} while (0)

struct duk_harray {

/* Shared object part. */

duk_hobject obj;

/* Array .length.

*

* At present Array .length may be smaller, equal, or even larger

* than the allocated underlying array part. Fast path code must

* always take this into account carefully.

*/

duk_uint32_t length;

/* Array .length property attributes. The property is always

* non-enumerable and non-configurable. It's initially writable

* but per Object.defineProperty() rules it can be made non-writable

* even if it is non-configurable. Thus we need to track the

* writability explicitly.

*

* XXX: this field to be eliminated and moved into duk_hobject

* flags field to save space.

*/

duk_bool_t length_nonwritable;

};

#endif /* DUK_HARRAY_H_INCLUDED */