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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2017-10-18 16:13:24 +0000 |
|---|---|---|
| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2017-10-18 16:13:24 +0000 |
| commit | 45923c08b00ccdfd888caf6d2b555a137c563988 (patch) | |
| tree | 5dc167cf4b8e3ff372f59ca9fb6ba0940387c83c /src/libstddjb/uint32_bswap.c | |
| parent | 62a04cdd0b6811c07bbafae37fe906a36fa800b1 (diff) | |
| download | skalibs-45923c08b00ccdfd888caf6d2b555a137c563988.tar.xz | |
Better packing / unpacking code
Godbolted for x86_64 with gcc and clang.
Diffstat (limited to 'src/libstddjb/uint32_bswap.c')
| -rw-r--r-- | src/libstddjb/uint32_bswap.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/libstddjb/uint32_bswap.c b/src/libstddjb/uint32_bswap.c new file mode 100644 index 0000000..b9dbcab --- /dev/null +++ b/src/libstddjb/uint32_bswap.c @@ -0,0 +1,13 @@ +/* ISC license. */ + +#include <stdint.h> +#include <skalibs/uint32.h> + +uint32_t uint32_bswap (uint32_t a) +{ + return + (a & 0x000000ffu) << 24 | + (a & 0x0000ff00u) << 8 | + (a & 0x00ff0000u) >> 8 | + (a & 0xff000000u) >> 24 ; +} |