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glibc  2.9
endian.h
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00001 /* Copyright (C) 1997, 1998 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 /* PowerPC can be little or big endian.  Hopefully gcc will know...  */
00020 
00021 #ifndef _ENDIAN_H
00022 # error "Never use <bits/endian.h> directly; include <endian.h> instead."
00023 #endif
00024 
00025 #if defined __BIG_ENDIAN__ || defined _BIG_ENDIAN
00026 # if defined __LITTLE_ENDIAN__ || defined _LITTLE_ENDIAN
00027 #  error Both BIG_ENDIAN and LITTLE_ENDIAN defined!
00028 # endif
00029 # define __BYTE_ORDER __BIG_ENDIAN
00030 #else
00031 # if defined __LITTLE_ENDIAN__ || defined _LITTLE_ENDIAN
00032 #  define __BYTE_ORDER __LITTLE_ENDIAN
00033 # else
00034 #  warning Cannot determine current byte order, assuming big-endian.
00035 #  define __BYTE_ORDER __BIG_ENDIAN
00036 # endif
00037 #endif