1/* Interface to byteswapping functions. 2 Copyright (C) 2006-2020 Free Software Foundation, Inc. 3 4 This file is part of libctf. 5 6 libctf is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 This program is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 14 See the GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; see the file COPYING. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20#ifndef _CTF_SWAP_H 21#define _CTF_SWAP_H 22 23#include "config.h" 24#include <stdint.h> 25 26#ifdef HAVE_BYTESWAP_H 27#include <byteswap.h> 28#endif /* defined(HAVE_BYTESWAP_H) */ 29 30/* Provide our own versions of the byteswap functions. */ 31 32#if !HAVE_DECL_BSWAP_16 33static inline uint16_t 34bswap_16 (uint16_t v) 35{ 36 return ((v >> 8) & 0xff) | ((v & 0xff) << 8); 37} 38#endif /* !HAVE_DECL_BSWAP16 */ 39 40#if !HAVE_DECL_BSWAP_32 41static inline uint32_t 42bswap_32 (uint32_t v) 43{ 44 return ( ((v & 0xff000000) >> 24) 45 | ((v & 0x00ff0000) >> 8) 46 | ((v & 0x0000ff00) << 8) 47 | ((v & 0x000000ff) << 24)); 48} 49#endif /* !HAVE_DECL_BSWAP32 */ 50 51#if !HAVE_DECL_BSWAP_64 52static inline uint64_t 53bswap_64 (uint64_t v) 54{ 55 return ( ((v & 0xff00000000000000ULL) >> 56) 56 | ((v & 0x00ff000000000000ULL) >> 40) 57 | ((v & 0x0000ff0000000000ULL) >> 24) 58 | ((v & 0x000000ff00000000ULL) >> 8) 59 | ((v & 0x00000000ff000000ULL) << 8) 60 | ((v & 0x0000000000ff0000ULL) << 24) 61 | ((v & 0x000000000000ff00ULL) << 40) 62 | ((v & 0x00000000000000ffULL) << 56)); 63} 64#endif /* !HAVE_DECL_BSWAP64 */ 65 66#endif /* !defined(_CTF_SWAP_H) */ 67