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| author | msmith <msmith@FreeBSD.org> | 1998-08-20 08:19:55 +0000 |
|---|---|---|
| committer | msmith <msmith@FreeBSD.org> | 1998-08-20 08:19:55 +0000 |
| commit | 335c4be5b17816baac6b70d4d0b3132925de858d (patch) | |
| tree | 93349031c3cbd63fd287516f83a63841b7e8105b /lib/libstand/bswap.c | |
| parent | 0ad6b3714378015da93827e12e95fa078a91ef12 (diff) | |
| download | FreeBSD-src-335c4be5b17816baac6b70d4d0b3132925de858d.zip FreeBSD-src-335c4be5b17816baac6b70d4d0b3132925de858d.tar.gz | |
This is libstand; a support library for standalone executables (eg. bootstrap
modules).
Obtained from: NetBSD, with some architectural changes and many additions.
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; +} + |
