1 /* 2 * Written by J.T. Conklin <jtc@netbsd.org>. 3 * Public domain. 4 */ 5 6 #if defined(LIBC_SCCS) && !defined(lint) 7 static char *rcsid = "$OpenBSD: htons.c,v 1.6 1997/07/25 20:30:07 mickey Exp $"; 8 #endif /* LIBC_SCCS and not lint */ 9 10 #include <sys/types.h> 11 #include <machine/endian.h> 12 13 #undef htons 14 15 u_int16_t 16 #ifdef __STDC__ 17 htons(u_int16_t x) 18 #else 19 htons(x) 20 u_int16_t x; 21 #endif 22 { 23 #if BYTE_ORDER == LITTLE_ENDIAN 24 u_char *s = (u_char *) &x; 25 return (u_int16_t)(s[0] << 8 | s[1]); 26 #else 27 return x; 28 #endif 29 } 30