ufs_bswap.h revision 253675
1296077Sadrian/* $NetBSD: ufs_bswap.h,v 1.13 2003/10/05 17:48:50 bouyer Exp $ */ 2296077Sadrian 3296077Sadrian/* 4296077Sadrian * Copyright (c) 1998 Manuel Bouyer. 5296077Sadrian * 6296077Sadrian * Redistribution and use in source and binary forms, with or without 7296077Sadrian * modification, are permitted provided that the following conditions 8296077Sadrian * are met: 9296077Sadrian * 1. Redistributions of source code must retain the above copyright 10296077Sadrian * notice, this list of conditions and the following disclaimer. 11296077Sadrian * 2. Redistributions in binary form must reproduce the above copyright 12296077Sadrian * notice, this list of conditions and the following disclaimer in the 13296077Sadrian * documentation and/or other materials provided with the distribution. 14296077Sadrian * 3. All advertising materials mentioning features or use of this software 15296077Sadrian * must display the following acknowledgement: 16296077Sadrian * This product includes software developed by Manuel Bouyer. 17296077Sadrian * 4. The name of the author may not be used to endorse or promote products 18296077Sadrian * derived from this software without specific prior written permission. 19296077Sadrian * 20296077Sadrian * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21296077Sadrian * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22296077Sadrian * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23296077Sadrian * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24296077Sadrian * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25296077Sadrian * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26296077Sadrian * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27296077Sadrian * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28296077Sadrian * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29296077Sadrian * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30296077Sadrian * 31296077Sadrian * $FreeBSD: head/usr.sbin/makefs/ffs/ufs_bswap.h 253675 2013-07-26 14:22:03Z marius $ 32296077Sadrian */ 33296077Sadrian 34296077Sadrian#ifndef _UFS_UFS_BSWAP_H_ 35296077Sadrian#define _UFS_UFS_BSWAP_H_ 36296077Sadrian 37296077Sadrian#if defined(_KERNEL_OPT) 38296077Sadrian#include "opt_ffs.h" 39296077Sadrian#endif 40296077Sadrian 41296077Sadrian#include <sys/endian.h> 42296077Sadrian 43296077Sadrian#include "makefs.h" 44296077Sadrian 45296077Sadrian/* Macros to access UFS flags */ 46296077Sadrian#ifdef FFS_EI 47296077Sadrian#define UFS_MPNEEDSWAP(mp) (VFSTOUFS(mp)->um_flags & UFS_NEEDSWAP) 48296077Sadrian#define UFS_FSNEEDSWAP(fs) ((fs)->fs_flags & FS_SWAPPED) 49296077Sadrian#define UFS_IPNEEDSWAP(ip) UFS_MPNEEDSWAP(ITOV(ip)->v_mount) 50296077Sadrian#else 51296077Sadrian#define UFS_MPNEEDSWAP(mp) (0) 52296077Sadrian#define UFS_FSNEEDSWAP(fs) (0) 53296077Sadrian#define UFS_IPNEEDSWAP(ip) (0) 54296077Sadrian#endif 55296077Sadrian 56296077Sadrian#if !defined(_KERNEL) || defined(FFS_EI) 57296077Sadrian/* inlines for access to swapped data */ 58296077Sadrianstatic __inline u_int16_t ufs_rw16 __P((u_int16_t, int)); 59296077Sadrianstatic __inline u_int32_t ufs_rw32 __P((u_int32_t, int)); 60296077Sadrianstatic __inline u_int64_t ufs_rw64 __P((u_int64_t, int)); 61296077Sadrian 62296077Sadrianstatic __inline u_int16_t 63296077Sadrianufs_rw16(u_int16_t a, int ns) 64296077Sadrian{ 65296077Sadrian return ((ns) ? bswap16(a) : (a)); 66296077Sadrian} 67296077Sadrianstatic __inline u_int32_t 68296077Sadrianufs_rw32(u_int32_t a, int ns) 69296077Sadrian{ 70296077Sadrian return ((ns) ? bswap32(a) : (a)); 71296077Sadrian} 72296077Sadrianstatic __inline u_int64_t 73296077Sadrianufs_rw64(u_int64_t a, int ns) 74296077Sadrian{ 75296077Sadrian return ((ns) ? bswap64(a) : (a)); 76296077Sadrian} 77296077Sadrian#else 78296077Sadrian#define ufs_rw16(a, ns) ((uint16_t)(a)) 79296077Sadrian#define ufs_rw32(a, ns) ((uint32_t)(a)) 80296077Sadrian#define ufs_rw64(a, ns) ((uint64_t)(a)) 81296077Sadrian#endif 82296077Sadrian 83296077Sadrian#define ufs_add16(a, b, ns) \ 84296077Sadrian (a) = ufs_rw16(ufs_rw16((a), (ns)) + (b), (ns)) 85296077Sadrian#define ufs_add32(a, b, ns) \ 86296077Sadrian (a) = ufs_rw32(ufs_rw32((a), (ns)) + (b), (ns)) 87296077Sadrian#define ufs_add64(a, b, ns) \ 88296077Sadrian (a) = ufs_rw64(ufs_rw64((a), (ns)) + (b), (ns)) 89296077Sadrian 90296077Sadrian#endif /* !_UFS_UFS_BSWAP_H_ */ 91296077Sadrian