49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
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/*
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* Array object representation, used for actual Array instances.
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*
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* All objects with the exotic array behavior (which must coincide with having
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* internal class array) MUST be duk_harrays. No other object can be a
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* duk_harray. However, duk_harrays may not always have an array part.
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*/
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#if !defined(DUK_HARRAY_H_INCLUDED)
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#define DUK_HARRAY_H_INCLUDED
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#if defined(DUK_USE_ASSERTIONS)
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DUK_INTERNAL_DECL void duk_harray_assert_valid(duk_harray *h);
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#define DUK_HARRAY_ASSERT_VALID(h) do { duk_harray_assert_valid((h)); } while (0)
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#else
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#define DUK_HARRAY_ASSERT_VALID(h) do {} while (0)
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#endif
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#define DUK_HARRAY_LENGTH_WRITABLE(h) (!(h)->length_nonwritable)
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#define DUK_HARRAY_LENGTH_NONWRITABLE(h) ((h)->length_nonwritable)
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#define DUK_HARRAY_SET_LENGTH_WRITABLE(h) do { (h)->length_nonwritable = 0; } while (0)
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#define DUK_HARRAY_SET_LENGTH_NONWRITABLE(h) do { (h)->length_nonwritable = 1; } while (0)
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struct duk_harray {
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/* Shared object part. */
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duk_hobject obj;
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/* Array .length.
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*
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* At present Array .length may be smaller, equal, or even larger
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* than the allocated underlying array part. Fast path code must
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* always take this into account carefully.
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*/
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duk_uint32_t length;
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/* Array .length property attributes. The property is always
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* non-enumerable and non-configurable. It's initially writable
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* but per Object.defineProperty() rules it can be made non-writable
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* even if it is non-configurable. Thus we need to track the
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* writability explicitly.
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*
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* XXX: this field to be eliminated and moved into duk_hobject
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* flags field to save space.
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*/
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duk_bool_t length_nonwritable;
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};
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#endif /* DUK_HARRAY_H_INCLUDED */
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