/*
** lua.c
** Linguagem para Usuarios de Aplicacao
*/

char *rcs_lua="$Id: lua.c,v 1.12 1996/07/05 20:55:43 roberto Exp roberto $";

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

#include "lua.h"
#include "lualib.h"


#ifdef _POSIX_SOURCE
#include <unistd.h>
#else
#define isatty(x)       (x==0)  /* assume stdin is a tty */
#endif


static void manual_input (void)
{
  if (isatty(0))
  {
   char buffer[250];
   while (fgets(buffer, sizeof(buffer), stdin) != 0)
     lua_dostring(buffer);
  }
  else
    lua_dofile(NULL);  /* executes stdin as a file */
}


int main (int argc, char *argv[])
{
  int i;
  int result = 0;
  iolib_open ();
  strlib_open ();
  mathlib_open ();
  if (argc < 2)
    manual_input();
  else for (i=1; i<argc; i++) {
    if (strcmp(argv[i], "-") == 0)
      manual_input();
    else if (strcmp(argv[i], "-v") == 0)
      printf("%s  %s\n(written by %s)\n\n",
             LUA_VERSION, LUA_COPYRIGHT, LUA_AUTHORS);
    else if ((strcmp(argv[i], "-e") == 0 && i++) || strchr(argv[i], '=')) {
      if (lua_dostring(argv[i]) != 0) {
        fprintf(stderr, "lua: error running argument `%s'\n", argv[i]);
        return 1;
      }
    }
    else {
      result = lua_dofile (argv[i]);
      if (result) {
        if (result == 2) {
          fprintf(stderr, "lua: cannot execute file `%s' - ", argv[i]);
          perror(NULL);
        }
        return 1;
      }
    }
  }
  return result;
}