int htonl(unsigned int w)
{
  unsigned int r1, r2, r3, r4;
  r1 = (w >> 24);
  r2 = (w << 24);
  r3 = (w & 0xff00) << 8;
  r4 = (w >> 8) & 0xff00;
  return (r1 | r2 | r3 | r4);
}