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/*
** $Id: luac.c,v 1.54 2006/06/02 17:37:11 lhf Exp $
** Lua compiler (saves bytecodes to files; also list bytecodes)
** See Copyright Notice in lua.h
*/

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define luac_c
#define LUA_CORE

#include "lua.h"
#include "lauxlib.h"

#include "ldo.h"
#include "lfunc.h"
#include "lmem.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lstring.h"
#include "lundump.h"

#define PROGNAME	"luac"		/* default program name */
#define	OUTPUT		PROGNAME ".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;	/* actual 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* what)
{
 fprintf(stderr,"%s: cannot %s %s: %s\n",progname,what,output,strerror(errno));
 exit(EXIT_FAILURE);
}

static void usage(const char* message)
{
 if (*message=='-')
  fprintf(stderr,"%s: unrecognized option " LUA_QS "\n",progname,message);
 else
  fprintf(stderr,"%s: %s\n",progname,message);
 fprintf(stderr,
 "usage: %s [options] [filenames].\n"
 "Available options are:\n"
 "  -        process stdin\n"
 "  -l       list\n"
 "  -o name  output to file " LUA_QL("name") " (default is \"%s\")\n"
 "  -p       parse only\n"
 "  -s       strip debug information\n"
 "  -v       show version information\n"
 "  --       stop handling options\n",
 progname,Output);
 exit(EXIT_FAILURE);
}

#define	IS(s)	(strcmp(argv[i],s)==0)

static int doargs(int argc, char* argv[])
{
 int i;
 int version=0;
 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;
   if (version) ++version;
   break;
  }