49 lines
803 B
C
49 lines
803 B
C
|
/* $NetBSD: bswap.c,v 1.1 1998/03/18 16:40:45 bouyer Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Written by Manuel Bouyer <bouyer@netbsd.org>.
|
||
|
|
* Public domain.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/cdefs.h>
|
||
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
||
|
|
__RCSID("$NetBSD: bswap.c,v 1.1 1998/03/18 16:40:45 bouyer Exp $");
|
||
|
|
#endif /* LIBC_SCCS and not lint */
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
|
||
|
|
#undef bswap64
|
||
|
|
|
||
|
|
#ifndef bswap16
|
||
|
|
u_int16_t
|
||
|
|
bswap16(x)
|
||
|
|
u_int16_t x;
|
||
|
|
{
|
||
|
|
return ((x << 8) & 0xff00) | ((x >> 8) & 0x00ff);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef bswap32
|
||
|
|
u_int32_t
|
||
|
|
bswap32(x)
|
||
|
|
u_int32_t x;
|
||
|
|
{
|
||
|
|
return ((x << 24) & 0xff000000 ) |
|
||
|
|
((x << 8) & 0x00ff0000 ) |
|
||
|
|
((x >> 8) & 0x0000ff00 ) |
|
||
|
|
((x >> 24) & 0x000000ff );
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|