40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
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/*
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* Heap native function representation.
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*/
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#if !defined(DUK_HNATFUNC_H_INCLUDED)
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#define DUK_HNATFUNC_H_INCLUDED
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#if defined(DUK_USE_ASSERTIONS)
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DUK_INTERNAL_DECL void duk_hnatfunc_assert_valid(duk_hnatfunc *h);
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#define DUK_HNATFUNC_ASSERT_VALID(h) do { duk_hnatfunc_assert_valid((h)); } while (0)
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#else
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#define DUK_HNATFUNC_ASSERT_VALID(h) do {} while (0)
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#endif
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#define DUK_HNATFUNC_NARGS_VARARGS ((duk_int16_t) -1)
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#define DUK_HNATFUNC_NARGS_MAX ((duk_int16_t) 0x7fff)
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struct duk_hnatfunc {
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/* shared object part */
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duk_hobject obj;
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duk_c_function func;
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duk_int16_t nargs;
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duk_int16_t magic;
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/* The 'magic' field allows an opaque 16-bit field to be accessed by the
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* Duktape/C function. This allows, for instance, the same native function
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* to be used for a set of very similar functions, with the 'magic' field
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* providing the necessary non-argument flags / values to guide the behavior
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* of the native function. The value is signed on purpose: it is easier to
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* convert a signed value to unsigned (simply AND with 0xffff) than vice
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* versa.
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*
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* Note: cannot place nargs/magic into the heaphdr flags, because
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* duk_hobject takes almost all flags already.
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*/
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};
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#endif /* DUK_HNATFUNC_H_INCLUDED */
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