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 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _UFS_UFS_BSWAP_H_ 30 #define _UFS_UFS_BSWAP_H_ 31 32 #if defined(_KERNEL_OPT) 33 #include "opt_ffs.h" 34 #endif 35 36 #include <sys/endian.h> 37 38 #include "makefs.h" 39 40 /* Macros to access UFS flags */ 41 #ifdef FFS_EI 42 #define UFS_MPNEEDSWAP(mp) (VFSTOUFS(mp)->um_flags & UFS_NEEDSWAP) 43 #define UFS_FSNEEDSWAP(fs) ((fs)->fs_flags & FS_SWAPPED) 44 #define UFS_IPNEEDSWAP(ip) UFS_MPNEEDSWAP(ITOV(ip)->v_mount) 45 #else 46 #define UFS_MPNEEDSWAP(mp) (0) 47 #define UFS_FSNEEDSWAP(fs) (0) 48 #define UFS_IPNEEDSWAP(ip) (0) 49 #endif 50 51 #if !defined(_KERNEL) || defined(FFS_EI) 52 /* inlines for access to swapped data */ 53 static __inline u_int16_t 54 ufs_rw16(u_int16_t a, int ns) 55 { 56 return ((ns) ? bswap16(a) : (a)); 57 } 58 static __inline u_int32_t 59 ufs_rw32(u_int32_t a, int ns) 60 { 61 return ((ns) ? bswap32(a) : (a)); 62 } 63 static __inline u_int64_t 64 ufs_rw64(u_int64_t a, int ns) 65 { 66 return ((ns) ? bswap64(a) : (a)); 67 } 68 #else 69 #define ufs_rw16(a, ns) ((uint16_t)(a)) 70 #define ufs_rw32(a, ns) ((uint32_t)(a)) 71 #define ufs_rw64(a, ns) ((uint64_t)(a)) 72 #endif 73 74 #define ufs_add16(a, b, ns) \ 75 (a) = ufs_rw16(ufs_rw16((a), (ns)) + (b), (ns)) 76 #define ufs_add32(a, b, ns) \ 77 (a) = ufs_rw32(ufs_rw32((a), (ns)) + (b), (ns)) 78 #define ufs_add64(a, b, ns) \ 79 (a) = ufs_rw64(ufs_rw64((a), (ns)) + (b), (ns)) 80 81 #endif /* !_UFS_UFS_BSWAP_H_ */ 82