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01: /* Copyright (C) 1992, 1996, 1997, 2000, 2008 Free Software Foundation, Inc.
02:    This file is part of the GNU C Library.
03: 
04:    The GNU C Library is free software; you can redistribute it and/or
05:    modify it under the terms of the GNU Lesser General Public
06:    License as published by the Free Software Foundation; either
07:    version 2.1 of the License, or (at your option) any later version.
08: 
09:    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: 
59: #ifdef __USE_BSD
60: /* Conversion interfaces.  */
61: # include <bits/byteswap.h>
62: 
63: # if __BYTE_ORDER == __LITTLE_ENDIAN
64: #  define htobe16(x) __bswap_16 (x)
65: #  define htole16(x) (x)
66: #  define be16toh(x) __bswap_16 (x)
67: #  define le16toh(x) (x)
68: 
69: #  define htobe32(x) __bswap_32 (x)
70: #  define htole32(x) (x)
71: #  define be32toh(x) __bswap_32 (x)
72: #  define le32toh(x) (x)
73: 
74: #  define htobe64(x) __bswap_64 (x)
75: #  define htole64(x) (x)
76: #  define be64toh(x) __bswap_64 (x)
77: #  define le64toh(x) (x)
78: # else
79: #  define htobe16(x) (x)
80: #  define htole16(x) __bswap_16 (x)
81: #  define be16toh(x) (x)
82: #  define le16toh(x) __bswap_16 (x)
83: 
84: #  define htobe32(x) (x)
85: #  define htole32(x) __bswap_32 (x)
86: #  define be32toh(x) (x)
87: #  define le32toh(x) __bswap_32 (x)
88: 
89: #  define htobe64(x) (x)
90: #  define htole64(x) __bswap_64 (x)
91: #  define be64toh(x) (x)
92: #  define le64toh(x) __bswap_64 (x)
93: # endif
94: #endif
95: 
96: #endif  /* endian.h */
97: 

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