/*      $NetBSD: xdr_subs.h,v 1.1.1.1 2013/09/30 07:19:42 dholland Exp $        */
/*-
* Copyright (c) 1989, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* 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.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* FreeBSD: head/sys/fs/nfs/xdr_subs.h 191783 2009-05-04 15:23:58Z rmacklem
* $NetBSD: xdr_subs.h,v 1.1.1.1 2013/09/30 07:19:42 dholland Exp $
*/

#ifndef _NFS_XDR_SUBS_H_
#define _NFS_XDR_SUBS_H_

/*
* Macros used for conversion to/from xdr representation by nfs...
* These use the MACHINE DEPENDENT routines ntohl, htonl
* As defined by "XDR: External Data Representation Standard" RFC1014
*
* To simplify the implementation, we use ntohl/htonl even on big-endian
* machines, and count on them being `#define'd away.  Some of these
* might be slightly more efficient as quad_t copies on a big-endian,
* but we cannot count on their alignment anyway.
*/

#define fxdr_unsigned(t, v)     ((t)ntohl((int32_t)(v)))
#define txdr_unsigned(v)        (htonl((int32_t)(v)))

#define fxdr_nfsv2time(f, t) do {                                       \
   (t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec);         \
   if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff)           \
       (t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
   else                                                                \
       (t)->tv_nsec = 0;                                               \
   } while (0)

#define txdr_nfsv2time(f, t) do {                                       \
   ((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->tv_sec);         \
   if ((f)->tv_nsec != -1)                                             \
       ((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->tv_nsec / 1000); \
   else                                                                \
       ((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff;            \
   } while (0)

#define fxdr_nfsv3time(f, t) do {                                       \
       (t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec);     \
       (t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec);   \
   } while (0)

#define txdr_nfsv3time(f, t) do {                                       \
       ((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec);     \
       ((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec);   \
   } while (0)

#define fxdr_nfsv4time(f, t) do {                                       \
       (t)->tv_sec = ntohl(((struct nfsv4_time *)(f))->nfsv4_sec);     \
       (t)->tv_nsec = (ntohl(((struct nfsv4_time *)(f))->nfsv4_nsec) % \
               1000000000);                                            \
   } while (0)

#define txdr_nfsv4time(f, t) do {                                       \
       ((struct nfsv4_time *)(t))->nfsv4_highsec = 0;                  \
       ((struct nfsv4_time *)(t))->nfsv4_sec = htonl((f)->tv_sec);     \
       ((struct nfsv4_time *)(t))->nfsv4_nsec = htonl((f)->tv_nsec);   \
   } while (0)

#define fxdr_hyper(f)                                                   \
       ((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) |             \
        (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))

#define txdr_hyper(f, t) do {                                           \
       ((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32));          \
       ((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff));   \
   } while (0)

#endif  /* _NFS_XDR_SUBS_H_ */

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