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glibc  2.9
byteswap.h
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00001 /* Copyright (C) 1997 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #ifndef _BYTESWAP_H
00020 #define _BYTESWAP_H  1
00021 
00022 /* Get the machine specific, optimized definitions.  */
00023 #include <bits/byteswap.h>
00024 
00025 
00026 /* The following definitions must all be macros since otherwise some
00027    of the possible optimizations are not possible.  */
00028 
00029 /* Return a value with all bytes in the 16 bit argument swapped.  */
00030 #define bswap_16(x) __bswap_16 (x)
00031 
00032 /* Return a value with all bytes in the 32 bit argument swapped.  */
00033 #define bswap_32(x) __bswap_32 (x)
00034 
00035 #if defined __GNUC__ && __GNUC__ >= 2
00036 /* Return a value with all bytes in the 64 bit argument swapped.  */
00037 # define bswap_64(x) __bswap_64 (x)
00038 #endif
00039 
00040 #endif /* byteswap.h */