FreeBSD/Linux Kernel Cross Reference
sys/ufs/ufs/ufs_bswap.h

     /*      $NetBSD: ufs_bswap.h,v 1.13 2003/10/05 17:48:50 bouyer Exp $    */
     
     /*
      * Copyright (c) 1998 Manuel Bouyer.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Manuel Bouyer.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     */
    
    #ifndef _UFS_UFS_BSWAP_H_
    #define _UFS_UFS_BSWAP_H_
    
    #if defined(_KERNEL_OPT)
    #include "opt_ffs.h"
    #endif
    
    #include <machine/bswap.h>
    
    /* Macros to access UFS flags */
    #ifdef FFS_EI
    #define UFS_MPNEEDSWAP(mp)      (VFSTOUFS(mp)->um_flags & UFS_NEEDSWAP)
    #define UFS_FSNEEDSWAP(fs)      ((fs)->fs_flags & FS_SWAPPED)
    #define UFS_IPNEEDSWAP(ip)      UFS_MPNEEDSWAP(ITOV(ip)->v_mount)
    #else
    #define UFS_MPNEEDSWAP(mp) (0)
    #define UFS_FSNEEDSWAP(fs) (0)
    #define UFS_IPNEEDSWAP(ip) (0)
    #endif
    
    #if !defined(_KERNEL) || defined(FFS_EI)
    /* inlines for access to swapped data */
    static __inline u_int16_t ufs_rw16 __P((u_int16_t, int));
    static __inline u_int32_t ufs_rw32 __P((u_int32_t, int));
    static __inline u_int64_t ufs_rw64 __P((u_int64_t, int));
    
    static __inline u_int16_t
    ufs_rw16(a, ns)
            u_int16_t a;
            int ns;
    {
            return ((ns) ?  bswap16(a) : (a));
    }
    static __inline u_int32_t
    ufs_rw32(a, ns)
            u_int32_t a;
            int ns;
    {
            return ((ns) ?  bswap32(a) : (a));
    }
    static __inline u_int64_t
    ufs_rw64(a, ns)
            u_int64_t a;
            int ns;
    {
            return ((ns) ?  bswap64(a) : (a));
    }
    #else
    #define ufs_rw16(a, ns) ((uint16_t)(a))
    #define ufs_rw32(a, ns) ((uint32_t)(a))
    #define ufs_rw64(a, ns) ((uint64_t)(a))
    #endif
    
    #define ufs_add16(a, b, ns) \
            (a) = ufs_rw16(ufs_rw16((a), (ns)) + (b), (ns))
    #define ufs_add32(a, b, ns) \
            (a) = ufs_rw32(ufs_rw32((a), (ns)) + (b), (ns))
    #define ufs_add64(a, b, ns) \
            (a) = ufs_rw64(ufs_rw64((a), (ns)) + (b), (ns))
    
    #endif /* !_UFS_UFS_BSWAP_H_ */

Cache object: a37d3a193116ef5aa8b6523ca9be9cf6