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., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19 #ifndef _BYTESWAP_H 20 #define _BYTESWAP_H 1 21 22 /* Get the machine specific, optimized definitions. */ 23 #include <bits/byteswap.h> 24 25 26 /* The following definitions must all be macros since otherwise some 27 of the possible optimizations are not possible. */ 28 29 /* Return a value with all bytes in the 16 bit argument swapped. */ 30 #define bswap_16(x) __bswap_16 (x) 31 32 /* Return a value with all bytes in the 32 bit argument swapped. */ 33 #define bswap_32(x) __bswap_32 (x) 34 35 #if defined __GNUC__ && __GNUC__ >= 2 36 /* Return a value with all bytes in the 64 bit argument swapped. */ 37 # define bswap_64(x) __bswap_64 (x) 38 #endif 39 40 #endif /* byteswap.h */ 41