Function newprefile

third-party/lua-5.2.4/src/liolib.c:168–173

** When creating file handles, always creates a `closed' file handle ** before opening the actual file; so, if there is a memory error, the ** file is not left opened. */

** file is not left opened.
*/
static LStream *newprefile (lua_State *L) {
  LStream *p = (LStream *)lua_newuserdata(L, sizeof(LStream));
  p->closef = NULL;  /* mark file handle as 'closed' */
  luaL_setmetatable(L, LUA_FILEHANDLE);
  return p;
}


static int aux_close (lua_State *L) {