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annotate third_party/luajit/src/lib_bit.c @ 206:240337164a80

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[Seobeo] SSL should be used for large file as well lol.
author MrJuneJune <me@mrjunejune.com>
date Sun, 15 Feb 2026 11:41:53 -0800
parents 94705b5986b3
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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178
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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1 /*
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2 ** Bit manipulation library.
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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 #define lib_bit_c
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7 #define LUA_LIB
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8
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9 #include "lua.h"
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10 #include "lauxlib.h"
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11 #include "lualib.h"
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12
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13 #include "lj_obj.h"
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14 #include "lj_err.h"
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15 #include "lj_buf.h"
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16 #include "lj_strscan.h"
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17 #include "lj_strfmt.h"
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18 #if LJ_HASFFI
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19 #include "lj_ctype.h"
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20 #include "lj_cdata.h"
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21 #include "lj_cconv.h"
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22 #include "lj_carith.h"
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23 #endif
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24 #include "lj_ff.h"
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25 #include "lj_lib.h"
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26
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27 /* ------------------------------------------------------------------------ */
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28
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29 #define LJLIB_MODULE_bit
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30
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31 #if LJ_HASFFI
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32 static int bit_result64(lua_State *L, CTypeID id, uint64_t x)
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33 {
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34 GCcdata *cd = lj_cdata_new_(L, id, 8);
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35 *(uint64_t *)cdataptr(cd) = x;
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36 setcdataV(L, L->base-1-LJ_FR2, cd);
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37 return FFH_RES(1);
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38 }
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39 #else
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40 static int32_t bit_checkbit(lua_State *L, int narg)
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41 {
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42 TValue *o = L->base + narg-1;
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43 if (!(o < L->top && lj_strscan_numberobj(o)))
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44 lj_err_argt(L, narg, LUA_TNUMBER);
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45 if (LJ_LIKELY(tvisint(o))) {
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46 return intV(o);
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47 } else {
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48 int32_t i = lj_num2bit(numV(o));
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49 if (LJ_DUALNUM) setintV(o, i);
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50 return i;
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51 }
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52 }
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53 #endif
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54
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55 LJLIB_ASM(bit_tobit) LJLIB_REC(bit_tobit)
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56 {
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57 #if LJ_HASFFI
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58 CTypeID id = 0;
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59 setintV(L->base-1-LJ_FR2, (int32_t)lj_carith_check64(L, 1, &id));
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60 return FFH_RES(1);
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61 #else
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62 lj_lib_checknumber(L, 1);
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63 return FFH_RETRY;
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64 #endif
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65 }
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66
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67 LJLIB_ASM(bit_bnot) LJLIB_REC(bit_unary IR_BNOT)
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68 {
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69 #if LJ_HASFFI
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70 CTypeID id = 0;
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71 uint64_t x = lj_carith_check64(L, 1, &id);
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72 return id ? bit_result64(L, id, ~x) : FFH_RETRY;
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73 #else
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74 lj_lib_checknumber(L, 1);
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75 return FFH_RETRY;
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76 #endif
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77 }
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78
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79 LJLIB_ASM(bit_bswap) LJLIB_REC(bit_unary IR_BSWAP)
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80 {
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81 #if LJ_HASFFI
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82 CTypeID id = 0;
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83 uint64_t x = lj_carith_check64(L, 1, &id);
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84 return id ? bit_result64(L, id, lj_bswap64(x)) : FFH_RETRY;
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85 #else
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86 lj_lib_checknumber(L, 1);
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87 return FFH_RETRY;
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88 #endif
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89 }
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90
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91 LJLIB_ASM(bit_lshift) LJLIB_REC(bit_shift IR_BSHL)
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92 {
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93 #if LJ_HASFFI
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94 CTypeID id = 0, id2 = 0;
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95 uint64_t x = lj_carith_check64(L, 1, &id);
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96 int32_t sh = (int32_t)lj_carith_check64(L, 2, &id2);
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97 if (id) {
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98 x = lj_carith_shift64(x, sh, curr_func(L)->c.ffid - (int)FF_bit_lshift);
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99 return bit_result64(L, id, x);
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100 }
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101 if (id2) setintV(L->base+1, sh);
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102 return FFH_RETRY;
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103 #else
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104 lj_lib_checknumber(L, 1);
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105 bit_checkbit(L, 2);
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106 return FFH_RETRY;
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107 #endif
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108 }
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109 LJLIB_ASM_(bit_rshift) LJLIB_REC(bit_shift IR_BSHR)
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110 LJLIB_ASM_(bit_arshift) LJLIB_REC(bit_shift IR_BSAR)
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111 LJLIB_ASM_(bit_rol) LJLIB_REC(bit_shift IR_BROL)
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112 LJLIB_ASM_(bit_ror) LJLIB_REC(bit_shift IR_BROR)
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113
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114 LJLIB_ASM(bit_band) LJLIB_REC(bit_nary IR_BAND)
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115 {
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116 #if LJ_HASFFI
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117 CTypeID id = 0;
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118 TValue *o = L->base, *top = L->top;
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119 int i = 0;
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120 do { lj_carith_check64(L, ++i, &id); } while (++o < top);
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121 if (id) {
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122 CTState *cts = ctype_cts(L);
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123 CType *ct = ctype_get(cts, id);
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124 int op = curr_func(L)->c.ffid - (int)FF_bit_bor;
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125 uint64_t x, y = op >= 0 ? 0 : ~(uint64_t)0;
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126 o = L->base;
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127 do {
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128 lj_cconv_ct_tv(cts, ct, (uint8_t *)&x, o, 0);
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129 if (op < 0) y &= x; else if (op == 0) y |= x; else y ^= x;
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130 } while (++o < top);
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131 return bit_result64(L, id, y);
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132 }
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133 return FFH_RETRY;
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134 #else
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135 int i = 0;
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136 do { lj_lib_checknumber(L, ++i); } while (L->base+i < L->top);
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137 return FFH_RETRY;
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138 #endif
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139 }
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140 LJLIB_ASM_(bit_bor) LJLIB_REC(bit_nary IR_BOR)
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141 LJLIB_ASM_(bit_bxor) LJLIB_REC(bit_nary IR_BXOR)
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142
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143 /* ------------------------------------------------------------------------ */
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144
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145 LJLIB_CF(bit_tohex) LJLIB_REC(.)
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146 {
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147 #if LJ_HASFFI
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148 CTypeID id = 0, id2 = 0;
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149 uint64_t b = lj_carith_check64(L, 1, &id);
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150 int32_t n = L->base+1>=L->top ? (id ? 16 : 8) :
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151 (int32_t)lj_carith_check64(L, 2, &id2);
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152 #else
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153 uint32_t b = (uint32_t)bit_checkbit(L, 1);
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154 int32_t n = L->base+1>=L->top ? 8 : bit_checkbit(L, 2);
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155 #endif
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156 SBuf *sb = lj_buf_tmp_(L);
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157 SFormat sf = (STRFMT_UINT|STRFMT_T_HEX);
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158 if (n < 0) { n = (int32_t)(~(uint32_t)n+1u); sf |= STRFMT_F_UPPER; }
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159 if ((uint32_t)n > 254) n = 254;
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160 sf |= ((SFormat)((n+1)&255) << STRFMT_SH_PREC);
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161 #if LJ_HASFFI
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162 if (n < 16) b &= ((uint64_t)1 << 4*n)-1;
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163 #else
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164 if (n < 8) b &= (1u << 4*n)-1;
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165 #endif
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166 sb = lj_strfmt_putfxint(sb, sf, b);
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167 setstrV(L, L->top-1, lj_buf_str(L, sb));
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168 lj_gc_check(L);
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169 return 1;
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170 }
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171
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172 /* ------------------------------------------------------------------------ */
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173
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174 #include "lj_libdef.h"
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175
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176 LUALIB_API int luaopen_bit(lua_State *L)
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177 {
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178 LJ_LIB_REG(L, LUA_BITLIBNAME, bit);
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179 return 1;
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180 }
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181