gistfile1.c

static void luafmt(void *data, const char *fmt, ...) {
  char *buf;
  lua_State *L = (lua_State *) data;
  va_list vl;

  va_start(vl,fmt);

  int size = vsprintf(NULL, fmt, vl);
  buf = malloc(size * sizeof(char));

  if(!buf) luaL_error(L, "luafmt: no memory");

  vsprintf(buf, fmt, vl);

  lua_pushstring(L, buf);

  free(buf);
}

static int lua_cpuid (lua_State *L) {
  lua_newtable(L); /* creates a table */

  int size1 = lua_gettop(L); // store first size

//  cpu_info_format(&base_cpuid, luafmt, L); //format shit

  luafmt((void *) L, "%s", "1 foo");
  luafmt((void *) L, "%s", "2 bar");

  int size2 = lua_gettop(L);

  // makes a string??
  for(int i = size2; i < size1; --i) {
    lua_rawseti(L, 1, i);  
  }

  // makes a table, but wrong order
/*
  for(int i = size2; i > size1; --i) {
    lua_rawseti(L, 1, i);
  }
*/

  return 1;
}