1/* $NetBSD: xdr_subs.h,v 1.15 2005/12/11 12:25:17 christos Exp $ */
2
3/*
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Rick Macklem at The University of Guelph.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)xdr_subs.h 8.3 (Berkeley) 3/30/95
35 */
36
37
38#ifndef _NFS_XDR_SUBS_H_
39#define _NFS_XDR_SUBS_H_
40
41/*
42 * Macros used for conversion to/from xdr representation by nfs...
43 * These use the MACHINE DEPENDENT routines ntohl, htonl
44 * As defined by "XDR: External Data Representation Standard" RFC1014
45 *
46 * To simplify the implementation, we use ntohl/htonl even on big-endian
47 * machines, and count on them being `#define'd away. Some of these
48 * might be slightly more efficient as quad_t copies on a big-endian,
49 * but we cannot count on their alignment anyway.
50 */
51
52#define fxdr_unsigned(t, v) ((t)ntohl((int32_t)(v)))
53#define txdr_unsigned(v) (htonl((int32_t)(v)))
54
55/*
56 * Directory cookies shouldn't really be XDR-ed, these functions
57 * are just here to attempt to keep information within 32 bits. And
58 * make things look better. See nfs_cookieheuristic.
59 */
60#define fxdr_cookie3(v) (((off_t)((v)[0]) << 32) | ((off_t) (v)[1]))
61#define fxdr_swapcookie3(v) (((off_t)((v)[1]) << 32) | ((off_t) (v)[0]))
62
63#define txdr_cookie3(f, v) { \
64 (v)[1] = (u_int32_t)((f) & 0xffffffffLL); \
65 (v)[0] = (u_int32_t)((f) >> 32); \
66}
67#define txdr_swapcookie3(f, v) { \
68 (v)[0] = (u_int32_t)((f) & 0xffffffffLL); \
69 (v)[1] = (u_int32_t)((f) >> 32); \
70}
71
72#define fxdr_nfsv2time(f, t) { \
73 (t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
74 if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
75 (t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
76 else \
77 (t)->tv_nsec = 0; \
78}
79#define txdr_nfsv2time(f, t) { \
80 ((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->tv_sec); \
81 if ((f)->tv_nsec != -1) \
82 ((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->tv_nsec / 1000); \
83 else \
84 ((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; \
85}
86
87#define fxdr_nfsv3time(f, t) { \
88 (t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
89 (t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
90}
91#define txdr_nfsv3time(f, t) { \
92 ((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); \
93 ((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); \
94}
95
96#define fxdr_hyper(f) \
97 ((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) | \
98 (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
99
100
101#define txdr_hyper(f, t) { \
102 ((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32)); \
103 ((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff)); \
104}
105
106#endif
107