1 /* Copyright (C) 1997 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 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., 51 Franklin Street, Fifth Floor, 17 Boston, MA 02110-1301, USA. 18 */ 19 20 #ifndef _BYTESWAP_H 21 #define _BYTESWAP_H 1 22 23 /* Get the machine specific, optimized definitions. */ 24 #include "byteswap1.h" 25 26 27 /* The following definitions must all be macros since otherwise some 28 of the possible optimizations are not possible. */ 29 30 /* Return a value with all bytes in the 16 bit argument swapped. */ 31 #define bswap_16(x) __bswap_16 (x) 32 33 /* Return a value with all bytes in the 32 bit argument swapped. */ 34 #define bswap_32(x) __bswap_32 (x) 35 36 #if defined __GNUC__ && __GNUC__ >= 2 37 /* Return a value with all bytes in the 64 bit argument swapped. */ 38 # define bswap_64(x) __bswap_64 (x) 39 #endif 40 41 #endif /* byteswap.h */ 42