common/lib/libc/net/htons.c

   1 /*      $NetBSD: htons.c,v 1.10 2003/07/26 19:24:48 salo 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: htons.c,v 1.10 2003/07/26 19:24:48 salo Exp $");
  11 #endif
  12
  13 #include <sys/types.h>
  14
  15 #undef htons
  16
  17 uint16_t
  18 htons(x)
  19         uint16_t x;
  20 {
  21 #if BYTE_ORDER == LITTLE_ENDIAN
  22         u_char *s = (u_char *) &x;
  23         return (uint16_t)(s[0] << 8 | s[1]);
  24 #else
  25         return x;
  26 #endif
  27 }