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| author | Mattias Andrée <maandree@member.fsf.org> | 2015-12-20 14:31:40 +0100 |
|---|---|---|
| committer | Mattias Andrée <maandree@member.fsf.org> | 2015-12-20 14:31:40 +0100 |
| commit | 679b8bdb5c40ca1909b025db10ddb5a98967c60e (patch) | |
| tree | f0c051e0569138a5c292e30892001604b65f851f /src/arpa/inet/htonl.c | |
| parent | fix issue #8 on github (diff) | |
| download | slibc-679b8bdb5c40ca1909b025db10ddb5a98967c60e.tar.gz slibc-679b8bdb5c40ca1909b025db10ddb5a98967c60e.tar.bz2 slibc-679b8bdb5c40ca1909b025db10ddb5a98967c60e.tar.xz | |
optimise implementations of {hton,ntoh}{s,l,ll}
Signed-off-by: Mattias Andrée <maandree@member.fsf.org>
Diffstat (limited to '')
| -rw-r--r-- | src/arpa/inet/htonl.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/arpa/inet/htonl.c b/src/arpa/inet/htonl.c index 7d998d4..8422fdc 100644 --- a/src/arpa/inet/htonl.c +++ b/src/arpa/inet/htonl.c @@ -16,6 +16,8 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <arpa/inet.h> +#include <bits/intconf.h> + /** @@ -31,11 +33,19 @@ */ uint32_t _htonl(uint32_t value) { +#if __INT32_BYTEORDER == 0x01020304 + return value; +#elif __INT32_BYTEORDER == 0x04030201 + return (value >> 24) | ((value & 0xFF0000) >> 8) | ((value & 0x00FF00) << 8) | (value << 24); +#elif __INT32_BYTEORDER == 0x02010403 + return (value & 0xFF00FF00) >> 8) | ((value & 0x00FF00FF) << 8); +#else char rc[4]; rc[0] = (value >> 24) & 255; rc[1] = (value >> 16) & 255; rc[2] = (value >> 8) & 255; rc[3] = (value >> 0) & 255; return *(uint32_t*)rc; +#endif } |