  ulonglong val_uint()
  {
    longlong nr= val_int();
    return nr < 0 && !unsigned_flag ? 0 : (ulonglong) nr;
  }
  ulonglong val_uint()
  {
    longlong nr= val_int();
    return nr < 0 && !unsigned_flag ? 0 : (ulonglong) nr;
  }