1/*	$NetBSD$	*/
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 *	@(#)xdr_subs.h	8.3 (Berkeley) 3/30/95
34 * FreeBSD: head/sys/nfs/xdr_subs.h 139823 2005-01-07 01:45:51Z imp
35 * $NetBSD$
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) \
57do { \
58	(t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
59	if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
60		(t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
61	else \
62		(t)->tv_nsec = 0; \
63} while (0)
64#define	txdr_nfsv2time(f, t) \
65do { \
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} while (0)
72
73#define	fxdr_nfsv3time(f, t) \
74do { \
75	(t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
76	(t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
77} while (0)
78#define	txdr_nfsv3time(f, t) \
79do { \
80	((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); \
81	((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); \
82} while (0)
83
84#define	fxdr_hyper(f) \
85	((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) | \
86	 (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
87#define	txdr_hyper(f, t) \
88do { \
89	((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32)); \
90	((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff)); \
91} while (0)
92
93#endif
94