From 45923c08b00ccdfd888caf6d2b555a137c563988 Mon Sep 17 00:00:00 2001 From: Laurent Bercot Date: Wed, 18 Oct 2017 16:13:24 +0000 Subject: Better packing / unpacking code Godbolted for x86_64 with gcc and clang. --- src/libstddjb/uint64_unpack.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) (limited to 'src/libstddjb/uint64_unpack.c') diff --git a/src/libstddjb/uint64_unpack.c b/src/libstddjb/uint64_unpack.c index 452d3ea..ca7aad9 100644 --- a/src/libstddjb/uint64_unpack.c +++ b/src/libstddjb/uint64_unpack.c @@ -1,17 +1,11 @@ /* ISC license. */ +#include #include -#include void uint64_unpack (char const *s, uint64_t *u) { - uint64_t r = T8((unsigned char)s[7]) ; r <<= 8 ; - r += T8((unsigned char)s[6]) ; r <<= 8 ; - r += T8((unsigned char)s[5]) ; r <<= 8 ; - r += T8((unsigned char)s[4]) ; r <<= 8 ; - r += T8((unsigned char)s[3]) ; r <<= 8 ; - r += T8((unsigned char)s[2]) ; r <<= 8 ; - r += T8((unsigned char)s[1]) ; r <<= 8 ; - r += T8((unsigned char)s[0]) ; - *u = r ; + uint64_t x ; + memcpy(&x, s, sizeof(uint64_t)) ; + *u = uint64_little(x) ; } -- cgit v1.2.3