C / C++ / MFC

int swap_int(int x)
{
  int y;
  char *p0=reinterpret_cast<char *>(&x);
  char *p1=reinterpret_cast<char *>(&y);
 
  p1[0]=p0[3];
  p1[1]=p0[2];
  p1[2]=p0[1];
  p1[3]=p0[0];
 
  return y;
}

template <class T> T ReverseBYTES (T &t)
{
    // reverses the bytes in 't'
    int bytes = sizeof(T);
    T rev;
    BYTE *ptr1 = (BYTE *)&t;
    BYTE *ptr2 = (BYTE *)&rev;
    for (int x = 0; x < bytes; x++)
        ptr2[x] = ptr1[bytes - x - 1];
    return rev;
}

u_long ntohl (
  u_long netlong  
);


The ntohl function takes a 32-bit number in TCP/IP network byte order and returns a 32-bit number in host byte order.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
Santa Cruz Networks