xdr_subs.h revision 47751 
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 * $Id: xdr_subs.h,v 1.10 1998/05/31 20:09:01 peter Exp $
38 */
39
40
41#ifndef _NFS_XDR_SUBS_H_
42#define _NFS_XDR_SUBS_H_
43
44/*
45 * Macros used for conversion to/from xdr representation by nfs...
46 * These use the MACHINE DEPENDENT routines ntohl, htonl
47 * As defined by "XDR: External Data Representation Standard" RFC1014
48 *
49 * To simplify the implementation, we use ntohl/htonl even on big-endian
50 * machines, and count on them being `#define'd away.  Some of these
51 * might be slightly more efficient as quad_t copies on a big-endian,
52 * but we cannot count on their alignment anyway.
53 */
54
55#define	fxdr_unsigned(t, v)	((t)ntohl((int32_t)(v)))
56#define	txdr_unsigned(v)	(htonl((int32_t)(v)))
57
58#define	fxdr_nfsv2time(f, t) { \
59	(t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
60	if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
61		(t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
62	else \
63		(t)->tv_nsec = 0; \
64}
65#define	txdr_nfsv2time(f, t) { \
66	((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->tv_sec); \
67	if ((f)->tv_nsec != -1) \
68		((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->tv_nsec / 1000); \
69	else \
70		((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; \
71}
72
73#define	fxdr_nfsv3time(f, t) { \
74	(t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
75	(t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
76}
77#define	txdr_nfsv3time(f, t) { \
78	((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); \
79	((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); \
80}
81
82#define	fxdr_hyper(f) \
83	((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) | \
84	 (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
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
91