The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/nfs/xdr_subs.h

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    1 /*      $OpenBSD: xdr_subs.h,v 1.8 2003/06/02 23:28:20 millert Exp $    */
    2 /*      $NetBSD: xdr_subs.h,v 1.11 1996/02/18 11:54:12 fvdl Exp $       */
    3 
    4 /*
    5  * Copyright (c) 1989, 1993
    6  *      The Regents of the University of California.  All rights reserved.
    7  *
    8  * This code is derived from software contributed to Berkeley by
    9  * Rick Macklem at The University of Guelph.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. Neither the name of the University nor the names of its contributors
   20  *    may be used to endorse or promote products derived from this software
   21  *    without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  *
   35  *      @(#)xdr_subs.h  8.3 (Berkeley) 3/30/95
   36  */
   37 
   38 
   39 #ifndef _NFS_XDR_SUBS_H_
   40 #define _NFS_XDR_SUBS_H_
   41 
   42 /*
   43  * Macros used for conversion to/from xdr representation by nfs...
   44  * These use the MACHINE DEPENDENT routines ntohl, htonl
   45  * As defined by "XDR: External Data Representation Standard" RFC1014
   46  *
   47  * To simplify the implementation, we use ntohl/htonl even on big-endian
   48  * machines, and count on them being `#define'd away.  Some of these
   49  * might be slightly more efficient as quad_t copies on a big-endian,
   50  * but we cannot count on their alignment anyway.
   51  */
   52 
   53 #define fxdr_unsigned(t, v)     ((t)ntohl((int32_t)(v)))
   54 #define txdr_unsigned(v)        (htonl((int32_t)(v)))
   55 
   56 #define fxdr_nfsv2time(f, t) { \
   57         (t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
   58         if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
   59                 (t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
   60         else \
   61                 (t)->tv_nsec = 0; \
   62 }
   63 #define txdr_nfsv2time(f, t) { \
   64         ((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->tv_sec); \
   65         if ((f)->tv_nsec != -1) \
   66                 ((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->tv_nsec / 1000); \
   67         else \
   68                 ((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; \
   69 }
   70 
   71 #define fxdr_nfsv3time(f, t) { \
   72         (t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
   73         (t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
   74 }
   75 #define txdr_nfsv3time(f, t) { \
   76         ((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); \
   77         ((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); \
   78 }
   79 
   80 #define fxdr_hyper(f)                                           \
   81         ((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) |     \
   82          (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
   83 
   84 
   85 #define txdr_hyper(f, t) {                                              \
   86         ((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32));          \
   87         ((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff));   \
   88 }
   89 
   90 #endif

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