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annotate third_party/luajit/src/lj_cconv.h @ 195:f8f5004a920a

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Merging back hg-web-tip
author MrJuneJune <me@mrjunejune.com>
date Tue, 27 Jan 2026 06:51:44 -0800
parents 94705b5986b3
children
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178
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1 /*
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2 ** C type conversions.
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3 ** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h
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4 */
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5
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6 #ifndef _LJ_CCONV_H
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7 #define _LJ_CCONV_H
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8
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9 #include "lj_obj.h"
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10 #include "lj_ctype.h"
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11
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12 #if LJ_HASFFI
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13
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14 /* Compressed C type index. ORDER CCX. */
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15 enum {
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16 CCX_B, /* Bool. */
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17 CCX_I, /* Integer. */
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18 CCX_F, /* Floating-point number. */
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19 CCX_C, /* Complex. */
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20 CCX_V, /* Vector. */
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21 CCX_P, /* Pointer. */
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22 CCX_A, /* Refarray. */
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23 CCX_S /* Struct/union. */
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24 };
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25
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26 /* Convert C type info to compressed C type index. ORDER CT. ORDER CCX. */
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27 static LJ_AINLINE uint32_t cconv_idx(CTInfo info)
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28 {
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29 uint32_t idx = ((info >> 26) & 15u); /* Dispatch bits. */
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30 lj_assertX(ctype_type(info) <= CT_MAYCONVERT,
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31 "cannot convert ctype %08x", info);
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32 #if LJ_64
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33 idx = ((uint32_t)(U64x(f436fff5,fff7f021) >> 4*idx) & 15u);
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34 #else
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35 idx = (((idx < 8 ? 0xfff7f021u : 0xf436fff5) >> 4*(idx & 7u)) & 15u);
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36 #endif
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37 lj_assertX(idx < 8, "cannot convert ctype %08x", info);
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38 return idx;
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39 }
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40
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41 #define cconv_idx2(dinfo, sinfo) \
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42 ((cconv_idx((dinfo)) << 3) + cconv_idx((sinfo)))
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43
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44 #define CCX(dst, src) ((CCX_##dst << 3) + CCX_##src)
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45
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46 /* Conversion flags. */
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47 #define CCF_CAST 0x00000001u
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48 #define CCF_FROMTV 0x00000002u
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49 #define CCF_SAME 0x00000004u
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50 #define CCF_IGNQUAL 0x00000008u
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51
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52 #define CCF_ARG_SHIFT 8
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53 #define CCF_ARG(n) ((n) << CCF_ARG_SHIFT)
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54 #define CCF_GETARG(f) ((f) >> CCF_ARG_SHIFT)
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55
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56 LJ_FUNC int lj_cconv_compatptr(CTState *cts, CType *d, CType *s, CTInfo flags);
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57 LJ_FUNC void lj_cconv_ct_ct(CTState *cts, CType *d, CType *s,
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58 uint8_t *dp, uint8_t *sp, CTInfo flags);
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59 LJ_FUNC int lj_cconv_tv_ct(CTState *cts, CType *s, CTypeID sid,
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60 TValue *o, uint8_t *sp);
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61 LJ_FUNC int lj_cconv_tv_bf(CTState *cts, CType *s, TValue *o, uint8_t *sp);
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62 LJ_FUNC void lj_cconv_ct_tv(CTState *cts, CType *d,
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63 uint8_t *dp, TValue *o, CTInfo flags);
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64 LJ_FUNC void lj_cconv_bf_tv(CTState *cts, CType *d, uint8_t *dp, TValue *o);
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65 LJ_FUNC int lj_cconv_multi_init(CTState *cts, CType *d, TValue *o);
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66 LJ_FUNC void lj_cconv_ct_init(CTState *cts, CType *d, CTSize sz,
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67 uint8_t *dp, TValue *o, MSize len);
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68
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69 #endif
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70
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71 #endif