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| author | Bruno Haible <bruno@clisp.org> | 2007-10-02 00:07:19 +0200 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2007-10-02 00:07:19 +0200 |
| commit | 293ec82ede14e2a6f3443637e5a8fb9da9ce3cbe (patch) | |
| tree | 4b61e6face4743aabfd43b4fa586b7c27facfdbb /lib/byteswap.in.h | |
| parent | 5155f7d837cf63d8670ad4bf4ead7d29b76ee8b9 (diff) | |
| download | gnulib-293ec82ede14e2a6f3443637e5a8fb9da9ce3cbe.tar.gz | |
Rename byteswap_.h to byteswap.in.h.
Diffstat (limited to 'lib/byteswap.in.h')
| -rw-r--r-- | lib/byteswap.in.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/byteswap.in.h b/lib/byteswap.in.h new file mode 100644 index 0000000000..ca85544319 --- /dev/null +++ b/lib/byteswap.in.h @@ -0,0 +1,45 @@ +/* byteswap.h - Byte swapping + Copyright (C) 2005, 2007 Free Software Foundation, Inc. + Written by Oskar Liljeblad <oskar@osk.mine.nu>, 2005. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#ifndef _GL_BYTESWAP_H +#define _GL_BYTESWAP_H + +/* Given an unsigned 16-bit argument X, return the value corresponding to + X with reversed byte order. */ +#define bswap_16(x) ((((x) & 0x00FF) << 8) | \ + (((x) & 0xFF00) >> 8)) + +/* Given an unsigned 32-bit argument X, return the value corresponding to + X with reversed byte order. */ +#define bswap_32(x) ((((x) & 0x000000FF) << 24) | \ + (((x) & 0x0000FF00) << 8) | \ + (((x) & 0x00FF0000) >> 8) | \ + (((x) & 0xFF000000) >> 24)) + +/* Given an unsigned 64-bit argument X, return the value corresponding to + X with reversed byte order. */ +#define bswap_64(x) ((((x) & 0x00000000000000FFULL) << 56) | \ + (((x) & 0x000000000000FF00ULL) << 40) | \ + (((x) & 0x0000000000FF0000ULL) << 24) | \ + (((x) & 0x00000000FF000000ULL) << 8) | \ + (((x) & 0x000000FF00000000ULL) >> 8) | \ + (((x) & 0x0000FF0000000000ULL) >> 24) | \ + (((x) & 0x00FF000000000000ULL) >> 40) | \ + (((x) & 0xFF00000000000000ULL) >> 56)) + +#endif /* _GL_BYTESWAP_H */ |