201 lines
4.5 KiB
C
201 lines
4.5 KiB
C
/*
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** $Id: luac.c 753 2010-01-25 07:58:31Z miros $
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** Lua compiler (saves bytecodes to files; also list bytecodes)
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** See Copyright Notice in lua.h
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define luac_c
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#define LUA_CORE
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#include "lua.h"
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#include "lauxlib.h"
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#include "ldo.h"
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#include "lfunc.h"
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#include "lmem.h"
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#include "lobject.h"
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#include "lopcodes.h"
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#include "lstring.h"
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#include "lundump.h"
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#define PROGNAME "luac" /* default program name */
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#define OUTPUT PROGNAME ".out" /* default output file */
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static int listing=0; /* list bytecodes? */
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static int dumping=1; /* dump bytecodes? */
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static int stripping=0; /* strip debug information? */
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static char Output[]={ OUTPUT }; /* default output file name */
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static const char* output=Output; /* actual output file name */
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static const char* progname=PROGNAME; /* actual program name */
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static void fatal(const char* message)
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{
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fprintf(stderr,"%s: %s\n",progname,message);
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exit(EXIT_FAILURE);
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}
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static void cannot(const char* what)
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{
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fprintf(stderr,"%s: cannot %s %s: %s\n",progname,what,output,strerror(errno));
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exit(EXIT_FAILURE);
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}
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static void usage(const char* message)
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{
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if (*message=='-')
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fprintf(stderr,"%s: unrecognized option " LUA_QS "\n",progname,message);
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else
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fprintf(stderr,"%s: %s\n",progname,message);
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fprintf(stderr,
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"usage: %s [options] [filenames].\n"
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"Available options are:\n"
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" - process stdin\n"
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" -l list\n"
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" -o name output to file " LUA_QL("name") " (default is \"%s\")\n"
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" -p parse only\n"
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" -s strip debug information\n"
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" -v show version information\n"
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" -- stop handling options\n",
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progname,Output);
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exit(EXIT_FAILURE);
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}
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#define IS(s) (strcmp(argv[i],s)==0)
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static int doargs(int argc, char* argv[])
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{
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int i;
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int version=0;
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if (argv[0]!=NULL && *argv[0]!=0) progname=argv[0];
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for (i=1; i<argc; i++)
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{
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if (*argv[i]!='-') /* end of options; keep it */
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break;
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else if (IS("--")) /* end of options; skip it */
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{
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++i;
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if (version) ++version;
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break;
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}
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else if (IS("-")) /* end of options; use stdin */
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break;
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else if (IS("-l")) /* list */
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++listing;
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else if (IS("-o")) /* output file */
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{
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output=argv[++i];
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if (output==NULL || *output==0) usage(LUA_QL("-o") " needs argument");
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if (IS("-")) output=NULL;
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}
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else if (IS("-p")) /* parse only */
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dumping=0;
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else if (IS("-s")) /* strip debug information */
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stripping=1;
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else if (IS("-v")) /* show version */
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++version;
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else /* unknown option */
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usage(argv[i]);
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}
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if (i==argc && (listing || !dumping))
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{
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dumping=0;
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argv[--i]=Output;
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}
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if (version)
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{
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printf("%s %s\n",LUA_RELEASE,LUA_COPYRIGHT);
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if (version==argc-1) exit(EXIT_SUCCESS);
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}
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return i;
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}
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#define toproto(L,i) (clvalue(L->top+(i))->l.p)
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static const Proto* combine(lua_State* L, int n)
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{
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if (n==1)
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return toproto(L,-1);
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else
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{
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int i,pc;
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Proto* f=luaF_newproto(L);
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setptvalue2s(L,L->top,f); incr_top(L);
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f->source=luaS_newliteral(L,"=(" PROGNAME ")");
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f->maxstacksize=1;
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pc=2*n+1;
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f->code=luaM_newvector(L,pc,Instruction);
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f->sizecode=pc;
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f->p=luaM_newvector(L,n,Proto*);
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f->sizep=n;
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pc=0;
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for (i=0; i<n; i++)
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{
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f->p[i]=toproto(L,i-n-1);
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f->code[pc++]=CREATE_ABx(OP_CLOSURE,0,i);
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f->code[pc++]=CREATE_ABC(OP_CALL,0,1,1);
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}
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f->code[pc++]=CREATE_ABC(OP_RETURN,0,1,0);
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return f;
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}
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}
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static int writer(lua_State* L, const void* p, size_t size, void* u)
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{
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UNUSED(L);
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return (fwrite(p,size,1,(FILE*)u)!=1) && (size!=0);
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}
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struct Smain {
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int argc;
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char** argv;
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};
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static int pmain(lua_State* L)
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{
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struct Smain* s = (struct Smain*)lua_touserdata(L, 1);
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int argc=s->argc;
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char** argv=s->argv;
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const Proto* f;
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int i;
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if (!lua_checkstack(L,argc)) fatal("too many input files");
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for (i=0; i<argc; i++)
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{
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const char* filename=IS("-") ? NULL : argv[i];
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if (luaL_loadfile(L,filename)!=0) fatal(lua_tostring(L,-1));
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}
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f=combine(L,argc);
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if (listing) luaU_print(f,listing>1);
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if (dumping)
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{
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FILE* D= (output==NULL) ? stdout : fopen(output,"wb");
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if (D==NULL) cannot("open");
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lua_lock(L);
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luaU_dump(L,f,writer,D,stripping);
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lua_unlock(L);
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if (ferror(D)) cannot("write");
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if (fclose(D)) cannot("close");
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}
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return 0;
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}
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int main(int argc, char* argv[])
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{
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lua_State* L;
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struct Smain s;
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int i=doargs(argc,argv);
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argc-=i; argv+=i;
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if (argc<=0) usage("no input files given");
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L=lua_open();
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if (L==NULL) fatal("not enough memory for state");
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s.argc=argc;
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s.argv=argv;
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if (lua_cpcall(L,pmain,&s)!=0) fatal(lua_tostring(L,-1));
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lua_close(L);
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return EXIT_SUCCESS;
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}
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