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/*
** $Id: luac.c,v 1.1 2004/03/16 21:58:30 niemeyer Exp $
** Lua compiler (saves bytecodes to files; also list bytecodes)
** See Copyright Notice in lua.h
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lua.h"
#include "lauxlib.h"
#include "lfunc.h"
#include "lmem.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lstring.h"
#include "lundump.h"
#ifndef LUA_DEBUG
#define luaB_opentests(L)
#endif
#ifndef PROGNAME
#define PROGNAME "luac" /* program name */
#endif
#define OUTPUT "luac.out" /* default output file */
static int listing=0; /* list bytecodes? */
static int dumping=1; /* dump bytecodes? */
static int stripping=0; /* strip debug information? */
static char Output[]={ OUTPUT }; /* default output file name */
static const char* output=Output; /* output file name */
static const char* progname=PROGNAME; /* actual program name */
static void fatal(const char* message)
{
fprintf(stderr,"%s: %s\n",progname,message);
exit(EXIT_FAILURE);
}
static void cannot(const char* name, const char* what, const char* mode)
{
fprintf(stderr,"%s: cannot %s %sput file ",progname,what,mode);
perror(name);
exit(EXIT_FAILURE);
}
static void usage(const char* message, const char* arg)
{
if (message!=NULL)
{
fprintf(stderr,"%s: ",progname); fprintf(stderr,message,arg); fprintf(stderr,"\n");
}
fprintf(stderr,
"usage: %s [options] [filenames]. Available options are:\n"
" - process stdin\n"
" -l list\n"
" -o name output to file `name' (default is \"" OUTPUT "\")\n"
" -p parse only\n"
" -s strip debug information\n"
" -v show version information\n"
" -- stop handling options\n",
progname);
exit(EXIT_FAILURE);
}
#define IS(s) (strcmp(argv[i],s)==0)
static int doargs(int argc, char* argv[])
{
int i;
if (argv[0]!=NULL && *argv[0]!=0) progname=argv[0];
for (i=1; i<argc; i++)
{
if (*argv[i]!='-') /* end of options; keep it */
break;
else if (IS("--")) /* end of options; skip it */
{
++i;
break;
}
else if (IS("-")) /* end of options; use stdin */
return i;
else if (IS("-l")) /* list */
listing=1;
else if (IS("-o")) /* output file */
{
output=argv[++i];
if (output==NULL || *output==0) usage("`-o' needs argument",NULL);
}
else if (IS("-p")) /* parse only */
dumping=0;
else if (IS("-s")) /* strip debug information */
stripping=1;
else if (IS("-v")) /* show version */
{
printf("%s %s\n",LUA_VERSION,LUA_COPYRIGHT);
if (argc==2) exit(EXIT_SUCCESS);
}
else /* unknown option */
usage("unrecognized option `%s'",argv[i]);
}
if (i==argc && (listing || !dumping))
{
dumping=0;
argv[--i]=Output;
}
return i;
}
static Proto* toproto(lua_State* L, int i)
{
const Closure* c=(const Closure*)lua_topointer(L,i);
return c->l.p;
}
static Proto* combine(lua_State* L, int n)
{
if (n==1)
return toproto(L,-1);
else
{
int i,pc=0;
Proto* f=luaF_newproto(L);
f->source=luaS_newliteral(L,"=(" PROGNAME ")");
f->maxstacksize=1;
f->p=luaM_newvector(L,n,Proto*);
f->sizep=n;
f->sizecode=2*n+1;
f->code=luaM_newvector(L,f->sizecode,Instruction);
for (i=0; i<n; i++)
{
f->p[i]=toproto(L,i-n);
f->code[pc++]=CREATE_ABx(OP_CLOSURE,0,i);
f->code[pc++]=CREATE_ABC(OP_CALL,0,1,1);
}
f->code[pc++]=CREATE_ABC(OP_RETURN,0,1,0);
return f;
}
}
static void strip(lua_State* L, Proto* f)
{
int i,n=f->sizep;
luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);
f->lineinfo=NULL; f->sizelineinfo=0;
f->locvars=NULL; f->sizelocvars=0;
f->upvalues=NULL; f->sizeupvalues=0;
f->source=luaS_newliteral(L,"=(none)");
for (i=0; i<n; i++) strip(L,f->p[i]);
}
static int writer(lua_State* L, const void* p, size_t size, void* u)
{
UNUSED(L);
return fwrite(p,size,1,(FILE*)u)==1;
}
int main(int argc, char* argv[])
{
lua_State* L;
Proto* f;
int i=doargs(argc,argv);
argc-=i; argv+=i;
if (argc<=0) usage("no input files given",NULL);
L=lua_open();
luaB_opentests(L);
for (i=0; i<argc; i++)
{
const char* filename=IS("-") ? NULL : argv[i];
if (luaL_loadfile(L,filename)!=0) fatal(lua_tostring(L,-1));
}
f=combine(L,argc);
if (listing) luaU_print(f);
if (dumping)
{
FILE* D=fopen(output,"wb");
if (D==NULL) cannot(output,"open","out");
if (stripping) strip(L,f);
luaU_dump(L,f,writer,D);
if (ferror(D)) cannot(output,"write","out");
fclose(D);
}
lua_close(L);
return 0;
}
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