glibc (2.38)
1 /* Swap byte order for 16, 32 and 64 bit values
2 Copyright (C) 1997-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #ifndef _BYTESWAP_H
20 #define _BYTESWAP_H 1
21
22 #include <features.h>
23
24 /* Get the machine specific, optimized definitions. */
25 #include <bits/byteswap.h>
26
27
28 /* The following definitions must all be macros, otherwise some
29 of the possible optimizations are not possible. */
30
31 /* Return a value with both bytes in the 16 bit argument swapped. */
32 #define bswap_16(x) __bswap_16 (x)
33
34 /* Return a value with all bytes in the 32 bit argument swapped. */
35 #define bswap_32(x) __bswap_32 (x)
36
37 /* Return a value with all bytes in the 64 bit argument swapped. */
38 #define bswap_64(x) __bswap_64 (x)
39
40 #endif /* byteswap.h */
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