common/lib/libc/net/htonl.c

   1 /*      $NetBSD: htonl.c,v 1.3 2012/03/21 20:02:56 he Exp $     */
   2
   3 /*
   4  * Written by J.T. Conklin <jtc@NetBSD.org>.
   5  * Public domain.
   6  */
   7
   8 #include <sys/cdefs.h>
   9 #if defined(LIBC_SCCS) && !defined(lint)
  10 __RCSID("$NetBSD: htonl.c,v 1.3 2012/03/21 20:02:56 he Exp $");
  11 #endif
  12
  13 #include <sys/types.h>
  14
  15 #undef htonl
  16
  17 uint32_t
  18 htonl(uint32_t x)
  19 {
  20 #if BYTE_ORDER == LITTLE_ENDIAN
  21         u_char *s = (void *)&x;
  22         return (uint32_t)(s[0] << 24 | s[1] << 16 | s[2] << 8 | s[3]);
  23 #else
  24         return x;
  25 #endif
  26 }