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xdr_subs.h revision 1.1.1.3 
      1 /*
      2  * Copyright (c) 1989, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Rick Macklem at The University of Guelph.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	@(#)xdr_subs.h	8.3 (Berkeley) 3/30/95
     37  */
     38 
     39 
     40 #ifndef _NFS_XDR_SUBS_H_
     41 #define _NFS_XDR_SUBS_H_
     42 
     43 /*
     44  * Macros used for conversion to/from xdr representation by nfs...
     45  * These use the MACHINE DEPENDENT routines ntohl, htonl
     46  * As defined by "XDR: External Data Representation Standard" RFC1014
     47  *
     48  * To simplify the implementation, we use ntohl/htonl even on big-endian
     49  * machines, and count on them being `#define'd away.  Some of these
     50  * might be slightly more efficient as quad_t copies on a big-endian,
     51  * but we cannot count on their alignment anyway.
     52  */
     53 
     54 #define	fxdr_unsigned(t, v)	((t)ntohl((long)(v)))
     55 #define	txdr_unsigned(v)	(htonl((long)(v)))
     56 
     57 #define	fxdr_nfsv2time(f, t) { \
     58 	(t)->ts_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
     59 	if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
     60 		(t)->ts_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
     61 	else \
     62 		(t)->ts_nsec = 0; \
     63 }
     64 #define	txdr_nfsv2time(f, t) { \
     65 	((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->ts_sec); \
     66 	if ((f)->ts_nsec != -1) \
     67 		((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->ts_nsec / 1000); \
     68 	else \
     69 		((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; \
     70 }
     71 
     72 #define	fxdr_nfsv3time(f, t) { \
     73 	(t)->ts_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
     74 	(t)->ts_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
     75 }
     76 #define	txdr_nfsv3time(f, t) { \
     77 	((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->ts_sec); \
     78 	((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->ts_nsec); \
     79 }
     80 
     81 #define	fxdr_hyper(f, t) { \
     82 	((long *)(t))[_QUAD_HIGHWORD] = ntohl(((long *)(f))[0]); \
     83 	((long *)(t))[_QUAD_LOWWORD] = ntohl(((long *)(f))[1]); \
     84 }
     85 #define	txdr_hyper(f, t) { \
     86 	((long *)(t))[0] = htonl(((long *)(f))[_QUAD_HIGHWORD]); \
     87 	((long *)(t))[1] = htonl(((long *)(f))[_QUAD_LOWWORD]); \
     88 }
     89 
     90 #endif
     91