| 1 | /* |
| 2 | ** $Id: luac.c,v 1.54 2006/06/02 17:37:11 lhf Exp $ |
| 3 | ** Lua compiler (saves bytecodes to files; also list bytecodes) |
| 4 | ** See Copyright Notice in lua.h |
| 5 | */ |
| 6 | |
| 7 | #include <errno.h> |
| 8 | #include <stdio.h> |
| 9 | #include <stdlib.h> |
| 10 | #include <string.h> |
| 11 | |
| 12 | #define luac_c |
| 13 | #define LUA_CORE |
| 14 | |
| 15 | #include "lua.h" |
| 16 | #include "lauxlib.h" |
| 17 | |
| 18 | #include "ldo.h" |
| 19 | #include "lfunc.h" |
| 20 | #include "lmem.h" |
| 21 | #include "lobject.h" |
| 22 | #include "lopcodes.h" |
| 23 | #include "lstring.h" |
| 24 | #include "lundump.h" |
| 25 | |
| 26 | #define PROGNAME "luac" /* default program name */ |
| 27 | #define OUTPUT PROGNAME ".out" /* default output file */ |
| 28 | |
| 29 | static int listing=0; /* list bytecodes? */ |
| 30 | static int dumping=1; /* dump bytecodes? */ |
| 31 | static int stripping=0; /* strip debug information? */ |
| 32 | static char Output[]={ OUTPUT }; /* default output file name */ |
| 33 | static const char* output=Output; /* actual output file name */ |
| 34 | static const char* progname=PROGNAME; /* actual program name */ |
| 35 | |
| 36 | static void fatal(const char* message) |
| 37 | { |
| 38 | fprintf(stderr,"%s: %s\n",progname,message); |
| 39 | exit(EXIT_FAILURE); |
| 40 | } |
| 41 | |
| 42 | static void cannot(const char* what) |
| 43 | { |
| 44 | fprintf(stderr,"%s: cannot %s %s: %s\n",progname,what,output,strerror(errno)); |
| 45 | exit(EXIT_FAILURE); |
| 46 | } |
| 47 | |
| 48 | static void usage(const char* message) |
| 49 | { |
| 50 | if (*message=='-') |
| 51 | fprintf(stderr,"%s: unrecognized option " LUA_QS "\n",progname,message); |
| 52 | else |
| 53 | fprintf(stderr,"%s: %s\n",progname,message); |
| 54 | fprintf(stderr, |
| 55 | "usage: %s [options] [filenames].\n" |
| 56 | "Available options are:\n" |
| 57 | " - process stdin\n" |
| 58 | " -l list\n" |
| 59 | " -o name output to file " LUA_QL("name") " (default is \"%s\")\n" |
| 60 | " -p parse only\n" |
| 61 | " -s strip debug information\n" |
| 62 | " -v show version information\n" |
| 63 | " -- stop handling options\n", |
| 64 | progname,Output); |
| 65 | exit(EXIT_FAILURE); |
| 66 | } |
| 67 | |
| 68 | #define IS(s) (strcmp(argv[i],s)==0) |
| 69 | |
| 70 | static int doargs(int argc, char* argv[]) |
| 71 | { |
| 72 | int i; |
| 73 | int version=0; |
| 74 | if (argv[0]!=NULL && *argv[0]!=0) progname=argv[0]; |
| 75 | for (i=1; i<argc; i++) |
| 76 | { |
| 77 | if (*argv[i]!='-') /* end of options; keep it */ |
| 78 | break; |
| 79 | else if (IS("--")) /* end of options; skip it */ |
| 80 | { |
| 81 | ++i; |
| 82 | if (version) ++version; |
| 83 | break; |
| 84 | } |
| 85 | else if (IS("-")) /* end of options; use stdin */ |
| 86 | break; |
| 87 | else if (IS("-l")) /* list */ |
| 88 | ++listing; |
| 89 | else if (IS("-o")) /* output file */ |
| 90 | { |
| 91 | output=argv[++i]; |
| 92 | if (output==NULL || *output==0) usage(LUA_QL("-o") " needs argument"); |
| 93 | if (IS("-")) output=NULL; |
| 94 | } |
| 95 | else if (IS("-p")) /* parse only */ |
| 96 | dumping=0; |
| 97 | else if (IS("-s")) /* strip debug information */ |
| 98 | stripping=1; |
| 99 | else if (IS("-v")) /* show version */ |
| 100 | ++version; |
| 101 | else /* unknown option */ |
| 102 | usage(argv[i]); |
| 103 | } |
| 104 | if (i==argc && (listing || !dumping)) |
| 105 | { |
| 106 | dumping=0; |
| 107 | argv[--i]=Output; |
| 108 | } |
| 109 | if (version) |
| 110 | { |
| 111 | printf("%s %s\n",LUA_RELEASE,LUA_COPYRIGHT); |
| 112 | if (version==argc-1) exit(EXIT_SUCCESS); |
| 113 | } |
| 114 | return i; |
| 115 | } |
| 116 | |
| 117 | #define toproto(L,i) (clvalue(L->top+(i))->l.p) |
| 118 | |
| 119 | static const Proto* combine(lua_State* L, int n) |
| 120 | { |
| 121 | if (n==1) |
| 122 | return toproto(L,-1); |
| 123 | else |
| 124 | { |
| 125 | int i,pc; |
| 126 | Proto* f=luaF_newproto(L); |
| 127 | setptvalue2s(L,L->top,f); incr_top(L); |
| 128 | f->source=luaS_newliteral(L,"=(" PROGNAME ")"); |
| 129 | f->maxstacksize=1; |
| 130 | pc=2*n+1; |
| 131 | f->code=luaM_newvector(L,pc,Instruction); |
| 132 | f->sizecode=pc; |
| 133 | f->p=luaM_newvector(L,n,Proto*); |
| 134 | f->sizep=n; |
| 135 | pc=0; |
| 136 | for (i=0; i<n; i++) |
| 137 | { |
| 138 | f->p[i]=toproto(L,i-n-1); |
| 139 | f->code[pc++]=CREATE_ABx(OP_CLOSURE,0,i); |
| 140 | f->code[pc++]=CREATE_ABC(OP_CALL,0,1,1); |
| 141 | } |
| 142 | f->code[pc++]=CREATE_ABC(OP_RETURN,0,1,0); |
| 143 | return f; |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | static int writer(lua_State* L, const void* p, size_t size, void* u) |
| 148 | { |
| 149 | UNUSED(L); |
| 150 | return (fwrite(p,size,1,(FILE*)u)!=1) && (size!=0); |
| 151 | } |
| 152 | |
| 153 | struct Smain { |
| 154 | int argc; |
| 155 | char** argv; |
| 156 | }; |
| 157 | |
| 158 | static int pmain(lua_State* L) |
| 159 | { |
| 160 | struct Smain* s = (struct Smain*)lua_touserdata(L, 1); |
| 161 | int argc=s->argc; |
| 162 | char** argv=s->argv; |
| 163 | const Proto* f; |
| 164 | int i; |
| 165 | if (!lua_checkstack(L,argc)) fatal("too many input files"); |
| 166 | for (i=0; i<argc; i++) |
| 167 | { |
| 168 | const char* filename=IS("-") ? NULL : argv[i]; |
| 169 | if (luaL_loadfile(L,filename)!=0) fatal(lua_tostring(L,-1)); |
| 170 | } |
| 171 | f=combine(L,argc); |
| 172 | if (listing) luaU_print(f,listing>1); |
| 173 | if (dumping) |
| 174 | { |
| 175 | FILE* D= (output==NULL) ? stdout : fopen(output,"wb"); |
| 176 | if (D==NULL) cannot("open"); |
| 177 | lua_lock(L); |
| 178 | luaU_dump(L,f,writer,D,stripping); |
| 179 | lua_unlock(L); |
| 180 | if (ferror(D)) cannot("write"); |
| 181 | if (fclose(D)) cannot("close"); |
| 182 | } |
| 183 | return 0; |
| 184 | } |
| 185 | |
| 186 | int main(int argc, char* argv[]) |
| 187 | { |
| 188 | lua_State* L; |
| 189 | struct Smain s; |
| 190 | int i=doargs(argc,argv); |
| 191 | argc-=i; argv+=i; |
| 192 | if (argc<=0) usage("no input files given"); |
| 193 | L=lua_open(); |
| 194 | if (L==NULL) fatal("not enough memory for state"); |
| 195 | s.argc=argc; |
| 196 | s.argv=argv; |
| 197 | if (lua_cpcall(L,pmain,&s)!=0) fatal(lua_tostring(L,-1)); |
| 198 | lua_close(L); |
| 199 | return EXIT_SUCCESS; |
| 200 | } |