bswap.c revision 84221 
1/*
2 * Written by Manuel Bouyer <bouyer@netbsd.org>.
3 * Public domain.
4 */
5
6#include <sys/cdefs.h>
7__FBSDID("$FreeBSD: head/lib/libstand/bswap.c 84221 2001-09-30 22:28:01Z dillon $");
8
9#if defined(LIBC_SCCS) && !defined(lint)
10static char *rcsid = "$NetBSD: bswap32.c,v 1.1 1997/10/09 15:42:33 bouyer Exp $";
11static char *rcsid = "$NetBSD: bswap64.c,v 1.1 1997/10/09 15:42:33 bouyer Exp $";
12#endif
13
14#include <sys/types.h>
15
16#undef bswap32
17#undef bswap64
18
19u_int32_t
20bswap32(x)
21    u_int32_t x;
22{
23	return  ((x << 24) & 0xff000000 ) |
24			((x <<  8) & 0x00ff0000 ) |
25			((x >>  8) & 0x0000ff00 ) |
26			((x >> 24) & 0x000000ff );
27}
28
29u_int64_t
30bswap64(x)
31    u_int64_t x;
32{
33	u_int32_t *p = (u_int32_t*)&x;
34	u_int32_t t;
35	t = bswap32(p[0]);
36	p[0] = bswap32(p[1]);
37	p[1] = t;
38	return x;
39}
40
41