FreeBSD-5.3/lib/libstand/bswap.c

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/*
 * Written by Manuel Bouyer <bouyer@netbsd.org>.
 * Public domain.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libstand/bswap.c,v 1.2 2001/09/30 22:28:00 dillon Exp $");

#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$NetBSD: bswap32.c,v 1.1 1997/10/09 15:42:33 bouyer Exp $";
static char *rcsid = "$NetBSD: bswap64.c,v 1.1 1997/10/09 15:42:33 bouyer Exp $";
#endif

#include <sys/types.h>

#undef bswap32
#undef bswap64

u_int32_t
bswap32(x)
    u_int32_t x;
{
	return  ((x << 24) & 0xff000000 ) |
			((x <<  8) & 0x00ff0000 ) |
			((x >>  8) & 0x0000ff00 ) |
			((x >> 24) & 0x000000ff );
}

u_int64_t
bswap64(x)
    u_int64_t x;
{  
	u_int32_t *p = (u_int32_t*)&x;
	u_int32_t t;
	t = bswap32(p[0]);
	p[0] = bswap32(p[1]);
	p[1] = t;
	return x;
}