1 /* $NetBSD: ufs_bswap.h,v 1.13 2003/10/05 17:48:50 bouyer Exp $ */
4 * Copyright (c) 1998 Manuel Bouyer.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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.
34 #ifndef _UFS_UFS_BSWAP_H_
35 #define _UFS_UFS_BSWAP_H_
37 #if defined(_KERNEL_OPT)
41 #include <sys/endian.h>
45 /* Macros to access UFS flags */
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)
51 #define UFS_MPNEEDSWAP(mp) (0)
52 #define UFS_FSNEEDSWAP(fs) (0)
53 #define UFS_IPNEEDSWAP(ip) (0)
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));
62 static __inline u_int16_t
63 ufs_rw16(u_int16_t a, int ns)
65 return ((ns) ? bswap16(a) : (a));
67 static __inline u_int32_t
68 ufs_rw32(u_int32_t a, int ns)
70 return ((ns) ? bswap32(a) : (a));
72 static __inline u_int64_t
73 ufs_rw64(u_int64_t a, int ns)
75 return ((ns) ? bswap64(a) : (a));
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))
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))
90 #endif /* !_UFS_UFS_BSWAP_H_ */