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annotate third_party/luajit/src/host/genlibbc.lua @ 210:0abed117e623

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Updated manifest color.
author MrJuneJune <me@mrjunejune.com>
date Sun, 15 Feb 2026 15:47:38 -0800
parents 94705b5986b3
children
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178
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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1 ----------------------------------------------------------------------------
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2 -- Lua script to dump the bytecode of the library functions written in Lua.
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3 -- The resulting 'buildvm_libbc.h' is used for the build process of LuaJIT.
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4 ----------------------------------------------------------------------------
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5 -- Copyright (C) 2005-2023 Mike Pall. All rights reserved.
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6 -- Released under the MIT license. See Copyright Notice in luajit.h
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7 ----------------------------------------------------------------------------
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8
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9 local ffi = require("ffi")
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10 local bit = require("bit")
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11 local vmdef = require("jit.vmdef")
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12 local bcnames = vmdef.bcnames
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13
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14 local format = string.format
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15
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16 local isbe = (string.byte(string.dump(function() end), 5) % 2 == 1)
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17
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18 local function usage(arg)
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19 io.stderr:write("Usage: ", arg and arg[0] or "genlibbc",
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20 " [-o buildvm_libbc.h] lib_*.c\n")
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21 os.exit(1)
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22 end
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23
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24 local function parse_arg(arg)
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25 local outfile = "-"
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26 if not (arg and arg[1]) then
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27 usage(arg)
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28 end
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29 if arg[1] == "-o" then
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30 outfile = arg[2]
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31 if not outfile then usage(arg) end
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32 table.remove(arg, 1)
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33 table.remove(arg, 1)
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34 end
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35 return outfile
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36 end
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37
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38 local function read_files(names)
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39 local src = ""
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40 for _,name in ipairs(names) do
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41 local fp = assert(io.open(name))
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42 src = src .. fp:read("*a")
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43 fp:close()
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44 end
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45 return src
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46 end
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47
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48 local function transform_lua(code)
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49 local fixup = {}
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50 local n = -30000
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51 code = string.gsub(code, "CHECK_(%w*)%((.-)%)", function(tp, var)
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52 n = n + 1
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53 fixup[n] = { "CHECK", tp }
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54 return format("%s=%d", var, n)
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55 end)
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56 code = string.gsub(code, "PAIRS%((.-)%)", function(var)
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57 fixup.PAIRS = true
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58 return format("nil, %s, 0x4dp80", var)
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59 end)
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60 return "return "..code, fixup
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61 end
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62
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63 local function read_uleb128(p)
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64 local v = p[0]; p = p + 1
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65 if v >= 128 then
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66 local sh = 7; v = v - 128
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67 repeat
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68 local r = p[0]
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69 v = v + bit.lshift(bit.band(r, 127), sh)
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70 sh = sh + 7
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71 p = p + 1
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72 until r < 128
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73 end
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74 return p, v
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75 end
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76
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77 -- ORDER LJ_T
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78 local name2itype = {
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79 str = 5, func = 9, tab = 12, int = 14, num = 15
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80 }
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81
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82 local BC, BCN = {}, {}
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83 for i=0,#bcnames/6-1 do
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84 local name = bcnames:sub(i*6+1, i*6+6):gsub(" ", "")
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85 BC[name] = i
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86 BCN[i] = name
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87 end
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88 local xop, xra = isbe and 3 or 0, isbe and 2 or 1
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89 local xrc, xrb = isbe and 1 or 2, isbe and 0 or 3
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90
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91 local function fixup_dump(dump, fixup)
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92 local buf = ffi.new("uint8_t[?]", #dump+1, dump)
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93 local p = buf+5
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94 local n, sizebc
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95 p, n = read_uleb128(p)
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96 local start = p
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97 p = p + 4
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98 p = read_uleb128(p)
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99 p = read_uleb128(p)
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100 p, sizebc = read_uleb128(p)
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101 local startbc = tonumber(p - start)
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102 local rawtab = {}
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103 for i=0,sizebc-1 do
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104 local op = p[xop]
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105 if op == BC.KSHORT then
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106 local rd = p[xrc] + 256*p[xrb]
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107 rd = bit.arshift(bit.lshift(rd, 16), 16)
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108 local f = fixup[rd]
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109 if f then
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110 if f[1] == "CHECK" then
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111 local tp = f[2]
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112 if tp == "tab" then rawtab[p[xra]] = true end
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113 p[xop] = tp == "num" and BC.ISNUM or BC.ISTYPE
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114 p[xrb] = 0
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115 p[xrc] = name2itype[tp]
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116 else
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117 error("unhandled fixup type: "..f[1])
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118 end
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119 end
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120 elseif op == BC.TGETV then
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121 if rawtab[p[xrb]] then
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122 p[xop] = BC.TGETR
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123 end
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124 elseif op == BC.TSETV then
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125 if rawtab[p[xrb]] then
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126 p[xop] = BC.TSETR
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127 end
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128 elseif op == BC.ITERC then
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129 if fixup.PAIRS then
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130 p[xop] = BC.ITERN
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131 end
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diff changeset
132 end
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MrJuneJune <me@mrjunejune.com>
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133 p = p + 4
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MrJuneJune <me@mrjunejune.com>
parents:
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134 end
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MrJuneJune <me@mrjunejune.com>
parents:
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135 local ndump = ffi.string(start, n)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
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136 -- Fixup hi-part of 0x4dp80 to LJ_KEYINDEX.
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
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137 ndump = ndump:gsub("\x80\x80\xcd\xaa\x04", "\xff\xff\xf9\xff\x0f")
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
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138 return { dump = ndump, startbc = startbc, sizebc = sizebc }
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MrJuneJune <me@mrjunejune.com>
parents:
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139 end
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MrJuneJune <me@mrjunejune.com>
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140
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MrJuneJune <me@mrjunejune.com>
parents:
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141 local function find_defs(src)
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MrJuneJune <me@mrjunejune.com>
parents:
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142 local defs = {}
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MrJuneJune <me@mrjunejune.com>
parents:
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143 for name, code in string.gmatch(src, "LJLIB_LUA%(([^)]*)%)%s*/%*(.-)%*/") do
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MrJuneJune <me@mrjunejune.com>
parents:
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144 local env = {}
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MrJuneJune <me@mrjunejune.com>
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145 local tcode, fixup = transform_lua(code)
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MrJuneJune <me@mrjunejune.com>
parents:
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146 local func = assert(load(tcode, "", nil, env))()
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MrJuneJune <me@mrjunejune.com>
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147 defs[name] = fixup_dump(string.dump(func, true), fixup)
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MrJuneJune <me@mrjunejune.com>
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148 defs[#defs+1] = name
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MrJuneJune <me@mrjunejune.com>
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149 end
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MrJuneJune <me@mrjunejune.com>
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150 return defs
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MrJuneJune <me@mrjunejune.com>
parents:
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151 end
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MrJuneJune <me@mrjunejune.com>
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152
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MrJuneJune <me@mrjunejune.com>
parents:
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153 local function gen_header(defs)
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MrJuneJune <me@mrjunejune.com>
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154 local t = {}
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MrJuneJune <me@mrjunejune.com>
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155 local function w(x) t[#t+1] = x end
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MrJuneJune <me@mrjunejune.com>
parents:
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156 w("/* This is a generated file. DO NOT EDIT! */\n\n")
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MrJuneJune <me@mrjunejune.com>
parents:
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157 w("static const int libbc_endian = ") w(isbe and 1 or 0) w(";\n\n")
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MrJuneJune <me@mrjunejune.com>
parents:
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158 local s, sb = "", ""
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MrJuneJune <me@mrjunejune.com>
parents:
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159 for i,name in ipairs(defs) do
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MrJuneJune <me@mrjunejune.com>
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160 local d = defs[name]
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MrJuneJune <me@mrjunejune.com>
parents:
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161 s = s .. d.dump
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MrJuneJune <me@mrjunejune.com>
parents:
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162 sb = sb .. string.char(i) .. ("\0"):rep(d.startbc - 1)
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MrJuneJune <me@mrjunejune.com>
parents:
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163 .. (isbe and "\0\0\0\255" or "\255\0\0\0"):rep(d.sizebc)
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MrJuneJune <me@mrjunejune.com>
parents:
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164 .. ("\0"):rep(#d.dump - d.startbc - d.sizebc*4)
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MrJuneJune <me@mrjunejune.com>
parents:
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165 end
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MrJuneJune <me@mrjunejune.com>
parents:
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166 w("static const uint8_t libbc_code[] = {\n")
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MrJuneJune <me@mrjunejune.com>
parents:
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167 local n = 0
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
168 for i=1,#s do
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MrJuneJune <me@mrjunejune.com>
parents:
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169 local x = string.byte(s, i)
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MrJuneJune <me@mrjunejune.com>
parents:
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170 local xb = string.byte(sb, i)
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MrJuneJune <me@mrjunejune.com>
parents:
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171 if xb == 255 then
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MrJuneJune <me@mrjunejune.com>
parents:
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172 local name = BCN[x]
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MrJuneJune <me@mrjunejune.com>
parents:
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173 local m = #name + 4
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
174 if n + m > 78 then n = 0; w("\n") end
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
175 n = n + m
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
176 w("BC_"); w(name)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
177 else
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
178 local m = x < 10 and 2 or (x < 100 and 3 or 4)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
179 if xb == 0 then
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
180 if n + m > 78 then n = 0; w("\n") end
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MrJuneJune <me@mrjunejune.com>
parents:
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181 else
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
182 local name = defs[xb]:gsub("_", ".")
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MrJuneJune <me@mrjunejune.com>
parents:
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183 if n ~= 0 then w("\n") end
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
184 w("/* "); w(name); w(" */ ")
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
185 n = #name + 7
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
186 end
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
187 n = n + m
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
188 w(x)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
189 end
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
190 w(",")
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
191 end
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
192 w("\n0\n};\n\n")
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
193 w("static const struct { const char *name; int ofs; } libbc_map[] = {\n")
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
194 local m = 0
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
195 for _,name in ipairs(defs) do
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
196 w('{"'); w(name); w('",'); w(m) w('},\n')
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
197 m = m + #defs[name].dump
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
198 end
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
199 w("{NULL,"); w(m); w("}\n};\n\n")
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
200 return table.concat(t)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
201 end
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
202
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
203 local function write_file(name, data)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
204 if name == "-" then
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
205 assert(io.write(data))
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
206 assert(io.flush())
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
207 else
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
208 local fp = io.open(name)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
209 if fp then
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
210 local old = fp:read("*a")
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
211 fp:close()
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
212 if data == old then return end
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
213 end
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
214 fp = assert(io.open(name, "w"))
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
215 assert(fp:write(data))
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
216 assert(fp:close())
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
217 end
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
218 end
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
219
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
220 local outfile = parse_arg(arg)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
221 local src = read_files(arg)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
222 local defs = find_defs(src)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
223 local hdr = gen_header(defs)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
224 write_file(outfile, hdr)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
225