1/*
2** C type conversions.
3** Copyright (C) 2005-2014 Mike Pall. See Copyright Notice in luajit.h
4*/
5
6#ifndef _LJ_CCONV_H
7#define _LJ_CCONV_H
8
9#include "lj_obj.h"
10#include "lj_ctype.h"
11
12#if LJ_HASFFI
13
14/* Compressed C type index. ORDER CCX. */
15enum {
16 CCX_B, /* Bool. */
17 CCX_I, /* Integer. */
18 CCX_F, /* Floating-point number. */
19 CCX_C, /* Complex. */
20 CCX_V, /* Vector. */
21 CCX_P, /* Pointer. */
22 CCX_A, /* Refarray. */
23 CCX_S /* Struct/union. */
24};
25
26/* Convert C type info to compressed C type index. ORDER CT. ORDER CCX. */
27static LJ_AINLINE uint32_t cconv_idx(CTInfo info)
28{
29 uint32_t idx = ((info >> 26) & 15u); /* Dispatch bits. */
30 lua_assert(ctype_type(info) <= CT_MAYCONVERT);
31#if LJ_64
32 idx = ((uint32_t)(U64x(f436fff5,fff7f021) >> 4*idx) & 15u);
33#else
34 idx = (((idx < 8 ? 0xfff7f021u : 0xf436fff5) >> 4*(idx & 7u)) & 15u);
35#endif
36 lua_assert(idx < 8);
37 return idx;
38}
39
40#define cconv_idx2(dinfo, sinfo) \
41 ((cconv_idx((dinfo)) << 3) + cconv_idx((sinfo)))
42
43#define CCX(dst, src) ((CCX_##dst << 3) + CCX_##src)
44
45/* Conversion flags. */
46#define CCF_CAST 0x00000001u
47#define CCF_FROMTV 0x00000002u
48#define CCF_SAME 0x00000004u
49#define CCF_IGNQUAL 0x00000008u
50
51#define CCF_ARG_SHIFT 8
52#define CCF_ARG(n) ((n) << CCF_ARG_SHIFT)
53#define CCF_GETARG(f) ((f) >> CCF_ARG_SHIFT)
54
55LJ_FUNC int lj_cconv_compatptr(CTState *cts, CType *d, CType *s, CTInfo flags);
56LJ_FUNC void lj_cconv_ct_ct(CTState *cts, CType *d, CType *s,
57 uint8_t *dp, uint8_t *sp, CTInfo flags);
58LJ_FUNC int lj_cconv_tv_ct(CTState *cts, CType *s, CTypeID sid,
59 TValue *o, uint8_t *sp);
60LJ_FUNC int lj_cconv_tv_bf(CTState *cts, CType *s, TValue *o, uint8_t *sp);
61LJ_FUNC void lj_cconv_ct_tv(CTState *cts, CType *d,
62 uint8_t *dp, TValue *o, CTInfo flags);
63LJ_FUNC void lj_cconv_bf_tv(CTState *cts, CType *d, uint8_t *dp, TValue *o);
64LJ_FUNC int lj_cconv_multi_init(CTState *cts, CType *d, TValue *o);
65LJ_FUNC void lj_cconv_ct_init(CTState *cts, CType *d, CTSize sz,
66 uint8_t *dp, TValue *o, MSize len);
67
68#endif
69
70#endif
71