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      1 /*	$NetBSD: xdr_subs.h,v 1.16 2024/12/07 02:05:55 riastradh 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 #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 /*
     55  * Directory cookies shouldn't really be XDR-ed, these functions
     56  * are just here to attempt to keep information within 32 bits. And
     57  * make things look better. See nfs_cookieheuristic.
     58  */
     59 #define fxdr_cookie3(v) (((off_t)((v)[0]) << 32) | ((off_t) (v)[1]))
     60 #define fxdr_swapcookie3(v) (((off_t)((v)[1]) << 32) | ((off_t) (v)[0]))
     61 
     62 #define txdr_cookie3(f, v) { \
     63 	(v)[1] = (u_int32_t)((f) & 0xffffffffLL); \
     64 	(v)[0] = (u_int32_t)((f) >> 32); \
     65 }
     66 #define txdr_swapcookie3(f, v) { \
     67 	(v)[0] = (u_int32_t)((f) & 0xffffffffLL); \
     68 	(v)[1] = (u_int32_t)((f) >> 32); \
     69 }
     70 
     71 #define	fxdr_nfsv2time(f, t) { \
     72 	(t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
     73 	if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
     74 		(t)->tv_nsec = 1000 * \
     75 		    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 = \
     83 		    htonl((f)->tv_nsec / 1000); \
     84 	else \
     85 		((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; \
     86 }
     87 
     88 #define	fxdr_nfsv3time(f, t) { \
     89 	(t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
     90 	(t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
     91 }
     92 #define	txdr_nfsv3time(f, t) { \
     93 	((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); \
     94 	((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); \
     95 }
     96 
     97 #define	fxdr_hyper(f) 						\
     98         ((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) |	\
     99 	 (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
    100 
    101 
    102 #define	txdr_hyper(f, t) {						\
    103 	((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32));		\
    104 	((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff));	\
    105 }
    106 
    107 #endif	/* _NFS_XDR_SUBS_H_ */
    108