xdr_subs.h revision 331722 
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 * 4. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	@(#)xdr_subs.h	8.3 (Berkeley) 3/30/95
33 * $FreeBSD: stable/11/sys/nfs/xdr_subs.h 331722 2018-03-29 02:50:57Z eadler $
34 */
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) \
55do { \
56	(t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
57	if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
58		(t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
59	else \
60		(t)->tv_nsec = 0; \
61} while (0)
62#define	txdr_nfsv2time(f, t) \
63do { \
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} while (0)
70
71#define	fxdr_nfsv3time(f, t) \
72do { \
73	(t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
74	(t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
75} while (0)
76#define	txdr_nfsv3time(f, t) \
77do { \
78	((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); \
79	((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); \
80} while (0)
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) \
86do { \
87	((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32)); \
88	((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff)); \
89} while (0)
90
91#endif
92