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