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/*
** C type conversions.
** Copyright (C) 2005-2022 Mike Pall. See Copyright Notice in luajit.h
*/
#ifndef _LJ_CCONV_H
#define _LJ_CCONV_H
#include "lj_obj.h"
#include "lj_ctype.h"
#if LJ_HASFFI
/* Compressed C type index. ORDER CCX. */
enum {
CCX_B, /* Bool. */
CCX_I, /* Integer. */
CCX_F, /* Floating-point number. */
CCX_C, /* Complex. */
CCX_V, /* Vector. */
CCX_P, /* Pointer. */
CCX_A, /* Refarray. */
CCX_S /* Struct/union. */
};
/* Convert C type info to compressed C type index. ORDER CT. ORDER CCX. */
static LJ_AINLINE uint32_t cconv_idx(CTInfo info)
{
uint32_t idx = ((info >> 26) & 15u); /* Dispatch bits. */
lj_assertX(ctype_type(info) <= CT_MAYCONVERT,
"cannot convert ctype %08x", info);
#if LJ_64
idx = ((uint32_t)(U64x(f436fff5,fff7f021) >> 4*idx) & 15u);
#else
idx = (((idx < 8 ? 0xfff7f021u : 0xf436fff5) >> 4*(idx & 7u)) & 15u);
#endif
lj_assertX(idx < 8, "cannot convert ctype %08x", info);
return idx;
}
#define cconv_idx2(dinfo, sinfo) \
((cconv_idx((dinfo)) << 3) + cconv_idx((sinfo)))
#define CCX(dst, src) ((CCX_##dst << 3) + CCX_##src)
/* Conversion flags. */
#define CCF_CAST 0x00000001u
#define CCF_FROMTV 0x00000002u
#define CCF_SAME 0x00000004u
#define CCF_IGNQUAL 0x00000008u
#define CCF_ARG_SHIFT 8
#define CCF_ARG(n) ((n) << CCF_ARG_SHIFT)
#define CCF_GETARG(f) ((f) >> CCF_ARG_SHIFT)
LJ_FUNC int lj_cconv_compatptr(CTState *cts, CType *d, CType *s, CTInfo flags);
LJ_FUNC void lj_cconv_ct_ct(CTState *cts, CType *d, CType *s,
uint8_t *dp, uint8_t *sp, CTInfo flags);
LJ_FUNC int lj_cconv_tv_ct(CTState *cts, CType *s, CTypeID sid,
TValue *o, uint8_t *sp);
LJ_FUNC int lj_cconv_tv_bf(CTState *cts, CType *s, TValue *o, uint8_t *sp);
LJ_FUNC void lj_cconv_ct_tv(CTState *cts, CType *d,
uint8_t *dp, TValue *o, CTInfo flags);
LJ_FUNC void lj_cconv_bf_tv(CTState *cts, CType *d, uint8_t *dp, TValue *o);
LJ_FUNC int lj_cconv_multi_init(CTState *cts, CType *d, TValue *o);
LJ_FUNC void lj_cconv_ct_init(CTState *cts, CType *d, CTSize sz,
uint8_t *dp, TValue *o, MSize len);
#endif
#endif
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