Guint FoFiBase::getUVarBE(int pos, int size, GBool *ok) {
  Guint x;
  int i;
  if (pos < 0 || pos + size > len) {
    *ok = gFalse;
    return 0;
  }
  x = 0;
  for (i = 0; i < size; ++i) {
    x = (x << 8) + file[pos + i];
  }
  return x;
}