82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
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/* $NetBSD: ulfs_bswap.h,v 1.6 2013/10/18 15:15:22 christos Exp $ */
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/* from NetBSD: ufs_bswap.h,v 1.19 2009/10/19 18:41:17 bouyer Exp */
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/*
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* Copyright (c) 1998 Manuel Bouyer.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _UFS_LFS_ULFS_BSWAP_H_
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#define _UFS_LFS_ULFS_BSWAP_H_
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#if defined(_KERNEL_OPT)
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#include "opt_lfs.h"
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#endif
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#include <sys/bswap.h>
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/* Macros to access ULFS flags */
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#ifdef LFS_EI
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#define ULFS_MPNEEDSWAP(lfs) ((lfs)->um_flags & ULFS_NEEDSWAP)
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#define ULFS_FSNEEDSWAP(fs) ((fs)->fs_flags & FS_SWAPPED)
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#define ULFS_IPNEEDSWAP(ip) ULFS_MPNEEDSWAP((ip)->i_lfs)
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#else
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#define ULFS_MPNEEDSWAP(ump) (__USE(ump), 0)
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#define ULFS_FSNEEDSWAP(fs) (__USE(fs), 0)
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#define ULFS_IPNEEDSWAP(ip) (__USE(ip), 0)
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#endif
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#if !defined(_KERNEL) || defined(LFS_EI)
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/* inlines for access to swapped data */
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static inline u_int16_t
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ulfs_rw16(uint16_t a, int ns)
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{
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return ((ns) ? bswap16(a) : (a));
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}
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static inline u_int32_t
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ulfs_rw32(uint32_t a, int ns)
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{
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return ((ns) ? bswap32(a) : (a));
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}
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static inline u_int64_t
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ulfs_rw64(uint64_t a, int ns)
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{
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return ((ns) ? bswap64(a) : (a));
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}
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#else
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#define ulfs_rw16(a, ns) (__USE(ns), (uint16_t)(a))
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#define ulfs_rw32(a, ns) (__USE(ns), (uint32_t)(a))
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#define ulfs_rw64(a, ns) (__USE(ns), (uint64_t)(a))
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#endif
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#define ulfs_add16(a, b, ns) \
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(a) = ulfs_rw16(ulfs_rw16((a), (ns)) + (b), (ns))
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#define ulfs_add32(a, b, ns) \
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(a) = ulfs_rw32(ulfs_rw32((a), (ns)) + (b), (ns))
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#define ulfs_add64(a, b, ns) \
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(a) = ulfs_rw64(ulfs_rw64((a), (ns)) + (b), (ns))
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#endif /* !_UFS_LFS_ULFS_BSWAP_H_ */
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