| 1 | /* Swap byte order for 16, 32 and 64 bit values |
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| 2 | Copyright (C) 1997-2022 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 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef _BYTESWAP_H |
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| 20 | #define _BYTESWAP_H 1 |
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| 21 | |
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| 22 | #include <features.h> |
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| 23 | |
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| 24 | /* Get the machine specific, optimized definitions. */ |
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| 25 | #include <bits/byteswap.h> |
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| 26 | |
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| 27 | |
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| 28 | /* The following definitions must all be macros, otherwise some |
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| 29 | of the possible optimizations are not possible. */ |
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| 30 | |
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| 31 | /* Return a value with both bytes in the 16 bit argument swapped. */ |
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| 32 | #define bswap_16(x) __bswap_16 (x) |
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| 33 | |
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| 34 | /* Return a value with all bytes in the 32 bit argument swapped. */ |
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| 35 | #define bswap_32(x) __bswap_32 (x) |
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| 36 | |
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| 37 | /* Return a value with all bytes in the 64 bit argument swapped. */ |
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| 38 | #define bswap_64(x) __bswap_64 (x) |
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| 39 | |
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| 40 | #endif /* byteswap.h */ |
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| 41 | |
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