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      1 /* Copyright (C) 1992, 1996, 1997, 2000 Free Software Foundation, Inc.
      2    This file is part of the GNU C Library.
      3 
      4    The GNU C Library is free software; you can redistribute it and/or
      5    modify it under the terms of the GNU Lesser General Public
      6    License as published by the Free Software Foundation; either
      7    version 2.1 of the License, or (at your option) any later version.
      8 
      9    The GNU C Library is distributed in the hope that it will be useful,
     10    but WITHOUT ANY WARRANTY; without even the implied warranty of
     11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12    Lesser General Public License for more details.
     13 
     14    You should have received a copy of the GNU Lesser General Public
     15    License along with the GNU C Library; if not, write to the Free
     16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
     17    02111-1307 USA.  */
     18 
     19 #ifndef	_ENDIAN_H
     20 #define	_ENDIAN_H	1
     21 
     22 #include <features.h>
     23 
     24 /* Definitions for byte order, according to significance of bytes,
     25    from low addresses to high addresses.  The value is what you get by
     26    putting '4' in the most significant byte, '3' in the second most
     27    significant byte, '2' in the second least significant byte, and '1'
     28    in the least significant byte, and then writing down one digit for
     29    each byte, starting with the byte at the lowest address at the left,
     30    and proceeding to the byte with the highest address at the right.  */
     31 
     32 #define	__LITTLE_ENDIAN	1234
     33 #define	__BIG_ENDIAN	4321
     34 #define	__PDP_ENDIAN	3412
     35 
     36 /* This file defines `__BYTE_ORDER' for the particular machine.  */
     37 #include <bits/endian.h>
     38 
     39 /* Some machines may need to use a different endianness for floating point
     40    values.  */
     41 #ifndef __FLOAT_WORD_ORDER
     42 # define __FLOAT_WORD_ORDER __BYTE_ORDER
     43 #endif
     44 
     45 #ifdef	__USE_BSD
     46 # define LITTLE_ENDIAN	__LITTLE_ENDIAN
     47 # define BIG_ENDIAN	__BIG_ENDIAN
     48 # define PDP_ENDIAN	__PDP_ENDIAN
     49 # define BYTE_ORDER	__BYTE_ORDER
     50 #endif
     51 
     52 #if __BYTE_ORDER == __LITTLE_ENDIAN
     53 # define __LONG_LONG_PAIR(HI, LO) LO, HI
     54 #elif __BYTE_ORDER == __BIG_ENDIAN
     55 # define __LONG_LONG_PAIR(HI, LO) HI, LO
     56 #endif
     57 
     58 #endif	/* endian.h */
     59