1 /* $NetBSD: ufs_bswap.h,v 1.13 2003/10/05 17:48:50 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 1998 Manuel Bouyer. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Manuel Bouyer. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34 #ifndef _UFS_UFS_BSWAP_H_ 35 #define _UFS_UFS_BSWAP_H_ 36 37 #if defined(_KERNEL_OPT) 38 #include "opt_ffs.h" 39 #endif 40 41 #include <sys/endian.h> 42 43 #include "makefs.h" 44 45 /* Macros to access UFS flags */ 46 #ifdef FFS_EI 47 #define UFS_MPNEEDSWAP(mp) (VFSTOUFS(mp)->um_flags & UFS_NEEDSWAP) 48 #define UFS_FSNEEDSWAP(fs) ((fs)->fs_flags & FS_SWAPPED) 49 #define UFS_IPNEEDSWAP(ip) UFS_MPNEEDSWAP(ITOV(ip)->v_mount) 50 #else 51 #define UFS_MPNEEDSWAP(mp) (0) 52 #define UFS_FSNEEDSWAP(fs) (0) 53 #define UFS_IPNEEDSWAP(ip) (0) 54 #endif 55 56 #if !defined(_KERNEL) || defined(FFS_EI) 57 /* inlines for access to swapped data */ 58 static __inline u_int16_t ufs_rw16 __P((u_int16_t, int)); 59 static __inline u_int32_t ufs_rw32 __P((u_int32_t, int)); 60 static __inline u_int64_t ufs_rw64 __P((u_int64_t, int)); 61 62 static __inline u_int16_t 63 ufs_rw16(u_int16_t a, int ns) 64 { 65 return ((ns) ? bswap16(a) : (a)); 66 } 67 static __inline u_int32_t 68 ufs_rw32(u_int32_t a, int ns) 69 { 70 return ((ns) ? bswap32(a) : (a)); 71 } 72 static __inline u_int64_t 73 ufs_rw64(u_int64_t a, int ns) 74 { 75 return ((ns) ? bswap64(a) : (a)); 76 } 77 #else 78 #define ufs_rw16(a, ns) ((uint16_t)(a)) 79 #define ufs_rw32(a, ns) ((uint32_t)(a)) 80 #define ufs_rw64(a, ns) ((uint64_t)(a)) 81 #endif 82 83 #define ufs_add16(a, b, ns) \ 84 (a) = ufs_rw16(ufs_rw16((a), (ns)) + (b), (ns)) 85 #define ufs_add32(a, b, ns) \ 86 (a) = ufs_rw32(ufs_rw32((a), (ns)) + (b), (ns)) 87 #define ufs_add64(a, b, ns) \ 88 (a) = ufs_rw64(ufs_rw64((a), (ns)) + (b), (ns)) 89 90 #endif /* !_UFS_UFS_BSWAP_H_ */ 91