1 /* $NetBSD: ufs_bswap.h,v 1.19 2009/10/19 18:41:17 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 */ 27 28 #ifndef _UFS_UFS_BSWAP_H_ 29 #define _UFS_UFS_BSWAP_H_ 30 31 #if defined(_KERNEL_OPT) 32 #include "opt_ffs.h" 33 #endif 34 35 #include <sys/bswap.h> 36 37 /* Macros to access UFS flags */ 38 #ifdef FFS_EI 39 #define UFS_MPNEEDSWAP(ump) ((ump)->um_flags & UFS_NEEDSWAP) 40 #define UFS_FSNEEDSWAP(fs) ((fs)->fs_flags & FS_SWAPPED) 41 #define UFS_IPNEEDSWAP(ip) UFS_MPNEEDSWAP((ip)->i_ump) 42 #else 43 #define UFS_MPNEEDSWAP(ump) (0) 44 #define UFS_FSNEEDSWAP(fs) (0) 45 #define UFS_IPNEEDSWAP(ip) (0) 46 #endif 47 48 #if !defined(_KERNEL) || defined(FFS_EI) 49 /* inlines for access to swapped data */ 50 static inline u_int16_t 51 ufs_rw16(uint16_t a, int ns) 52 { 53 return ((ns) ? bswap16(a) : (a)); 54 } 55 56 static inline u_int32_t 57 ufs_rw32(uint32_t a, int ns) 58 { 59 return ((ns) ? bswap32(a) : (a)); 60 } 61 62 static inline u_int64_t 63 ufs_rw64(uint64_t a, int ns) 64 { 65 return ((ns) ? bswap64(a) : (a)); 66 } 67 #else 68 #define ufs_rw16(a, ns) ((uint16_t)(a)) 69 #define ufs_rw32(a, ns) ((uint32_t)(a)) 70 #define ufs_rw64(a, ns) ((uint64_t)(a)) 71 #endif 72 73 #define ufs_add16(a, b, ns) \ 74 (a) = ufs_rw16(ufs_rw16((a), (ns)) + (b), (ns)) 75 #define ufs_add32(a, b, ns) \ 76 (a) = ufs_rw32(ufs_rw32((a), (ns)) + (b), (ns)) 77 #define ufs_add64(a, b, ns) \ 78 (a) = ufs_rw64(ufs_rw64((a), (ns)) + (b), (ns)) 79 80 #endif /* !_UFS_UFS_BSWAP_H_ */ 81