| 1 | /* Endian macros for string.h functions |
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| 2 | Copyright (C) 1992-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <http://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef _BITS_ENDIAN_H |
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| 20 | #define _BITS_ENDIAN_H 1 |
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| 21 | |
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| 22 | /* Definitions for byte order, according to significance of bytes, |
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| 23 | from low addresses to high addresses. The value is what you get by |
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| 24 | putting '4' in the most significant byte, '3' in the second most |
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| 25 | significant byte, '2' in the second least significant byte, and '1' |
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| 26 | in the least significant byte, and then writing down one digit for |
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| 27 | each byte, starting with the byte at the lowest address at the left, |
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| 28 | and proceeding to the byte with the highest address at the right. */ |
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| 29 | |
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| 30 | #define __LITTLE_ENDIAN 1234 |
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| 31 | #define __BIG_ENDIAN 4321 |
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| 32 | #define __PDP_ENDIAN 3412 |
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| 33 | |
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| 34 | /* This file defines `__BYTE_ORDER' for the particular machine. */ |
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| 35 | #include <bits/endianness.h> |
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| 36 | |
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| 37 | /* Some machines may need to use a different endianness for floating point |
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| 38 | values. */ |
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| 39 | #ifndef __FLOAT_WORD_ORDER |
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| 40 | # define __FLOAT_WORD_ORDER __BYTE_ORDER |
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| 41 | #endif |
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| 42 | |
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| 43 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
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| 44 | # define __LONG_LONG_PAIR(HI, LO) LO, HI |
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| 45 | #elif __BYTE_ORDER == __BIG_ENDIAN |
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| 46 | # define __LONG_LONG_PAIR(HI, LO) HI, LO |
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| 47 | #endif |
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| 48 | |
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| 49 | #endif /* bits/endian.h */ |
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| 50 | |
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