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      1 /*	$NetBSD: xdr_subs.h,v 1.1.1.1 2013/09/30 07:19:42 dholland Exp $	*/
      2 /*-
      3  * Copyright (c) 1989, 1993
      4  *	The Regents of the University of California.  All rights reserved.
      5  *
      6  * This code is derived from software contributed to Berkeley by
      7  * Rick Macklem at The University of Guelph.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  * FreeBSD: head/sys/fs/nfs/xdr_subs.h 191783 2009-05-04 15:23:58Z rmacklem
     34  * $NetBSD: xdr_subs.h,v 1.1.1.1 2013/09/30 07:19:42 dholland Exp $
     35  */
     36 
     37 #ifndef _NFS_XDR_SUBS_H_
     38 #define	_NFS_XDR_SUBS_H_
     39 
     40 /*
     41  * Macros used for conversion to/from xdr representation by nfs...
     42  * These use the MACHINE DEPENDENT routines ntohl, htonl
     43  * As defined by "XDR: External Data Representation Standard" RFC1014
     44  *
     45  * To simplify the implementation, we use ntohl/htonl even on big-endian
     46  * machines, and count on them being `#define'd away.  Some of these
     47  * might be slightly more efficient as quad_t copies on a big-endian,
     48  * but we cannot count on their alignment anyway.
     49  */
     50 
     51 #define	fxdr_unsigned(t, v)	((t)ntohl((int32_t)(v)))
     52 #define	txdr_unsigned(v)	(htonl((int32_t)(v)))
     53 
     54 #define	fxdr_nfsv2time(f, t) do { 					\
     55     (t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); 	\
     56     if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) 		\
     57 	(t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
     58     else 								\
     59 	(t)->tv_nsec = 0; 						\
     60     } while (0)
     61 
     62 #define	txdr_nfsv2time(f, t) do { 					\
     63     ((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->tv_sec); 	\
     64     if ((f)->tv_nsec != -1) 						\
     65 	((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->tv_nsec / 1000); \
     66     else 								\
     67 	((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; 		\
     68     } while (0)
     69 
     70 #define	fxdr_nfsv3time(f, t) do { 					\
     71 	(t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); 	\
     72 	(t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); 	\
     73     } while (0)
     74 
     75 #define	txdr_nfsv3time(f, t) do { 					\
     76 	((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); 	\
     77 	((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); 	\
     78     } while (0)
     79 
     80 #define	fxdr_nfsv4time(f, t) do { 					\
     81 	(t)->tv_sec = ntohl(((struct nfsv4_time *)(f))->nfsv4_sec); 	\
     82 	(t)->tv_nsec = (ntohl(((struct nfsv4_time *)(f))->nfsv4_nsec) % \
     83 		1000000000); 						\
     84     } while (0)
     85 
     86 #define	txdr_nfsv4time(f, t) do { 					\
     87 	((struct nfsv4_time *)(t))->nfsv4_highsec = 0; 			\
     88 	((struct nfsv4_time *)(t))->nfsv4_sec = htonl((f)->tv_sec); 	\
     89 	((struct nfsv4_time *)(t))->nfsv4_nsec = htonl((f)->tv_nsec); 	\
     90     } while (0)
     91 
     92 #define	fxdr_hyper(f) 							\
     93         ((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) |		\
     94 	 (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
     95 
     96 #define	txdr_hyper(f, t) do {						\
     97 	((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32));		\
     98 	((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff));	\
     99     } while (0)
    100 
    101 #endif	/* _NFS_XDR_SUBS_H_ */
    102