diff options
Diffstat (limited to 'lib/libstand/bswap.c')
| -rw-r--r-- | lib/libstand/bswap.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/lib/libstand/bswap.c b/lib/libstand/bswap.c new file mode 100644 index 0000000..1951509 --- /dev/null +++ b/lib/libstand/bswap.c @@ -0,0 +1,37 @@ +/* + * Written by Manuel Bouyer <bouyer@netbsd.org>. + * Public domain. + */ + +#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; +} + |
