forked from mia/Aegisub
71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
/*
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** C type conversions.
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** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
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*/
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#ifndef _LJ_CCONV_H
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#define _LJ_CCONV_H
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#include "lj_obj.h"
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#include "lj_ctype.h"
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#if LJ_HASFFI
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/* Compressed C type index. ORDER CCX. */
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enum {
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CCX_B, /* Bool. */
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CCX_I, /* Integer. */
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CCX_F, /* Floating-point number. */
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CCX_C, /* Complex. */
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CCX_V, /* Vector. */
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CCX_P, /* Pointer. */
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CCX_A, /* Refarray. */
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CCX_S /* Struct/union. */
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};
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/* Convert C type info to compressed C type index. ORDER CT. ORDER CCX. */
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static LJ_AINLINE uint32_t cconv_idx(CTInfo info)
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{
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uint32_t idx = ((info >> 26) & 15u); /* Dispatch bits. */
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lua_assert(ctype_type(info) <= CT_MAYCONVERT);
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#if LJ_64
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idx = ((uint32_t)(U64x(f436fff5,fff7f021) >> 4*idx) & 15u);
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#else
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idx = (((idx < 8 ? 0xfff7f021u : 0xf436fff5) >> 4*(idx & 7u)) & 15u);
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#endif
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lua_assert(idx < 8);
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return idx;
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}
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#define cconv_idx2(dinfo, sinfo) \
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((cconv_idx((dinfo)) << 3) + cconv_idx((sinfo)))
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#define CCX(dst, src) ((CCX_##dst << 3) + CCX_##src)
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/* Conversion flags. */
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#define CCF_CAST 0x00000001u
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#define CCF_FROMTV 0x00000002u
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#define CCF_SAME 0x00000004u
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#define CCF_IGNQUAL 0x00000008u
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#define CCF_ARG_SHIFT 8
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#define CCF_ARG(n) ((n) << CCF_ARG_SHIFT)
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#define CCF_GETARG(f) ((f) >> CCF_ARG_SHIFT)
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LJ_FUNC int lj_cconv_compatptr(CTState *cts, CType *d, CType *s, CTInfo flags);
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LJ_FUNC void lj_cconv_ct_ct(CTState *cts, CType *d, CType *s,
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uint8_t *dp, uint8_t *sp, CTInfo flags);
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LJ_FUNC int lj_cconv_tv_ct(CTState *cts, CType *s, CTypeID sid,
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TValue *o, uint8_t *sp);
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LJ_FUNC int lj_cconv_tv_bf(CTState *cts, CType *s, TValue *o, uint8_t *sp);
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LJ_FUNC void lj_cconv_ct_tv(CTState *cts, CType *d,
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uint8_t *dp, TValue *o, CTInfo flags);
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LJ_FUNC void lj_cconv_bf_tv(CTState *cts, CType *d, uint8_t *dp, TValue *o);
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LJ_FUNC int lj_cconv_multi_init(CTState *cts, CType *d, TValue *o);
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LJ_FUNC void lj_cconv_ct_init(CTState *cts, CType *d, CTSize sz,
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uint8_t *dp, TValue *o, MSize len);
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#endif
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#endif
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