1 /* Swap byte order for 16, 32 and 64 bit values 2 Copyright (C) 1997-2022 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 */ 41