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Annotation of sys/nfs/xdr_subs.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: xdr_subs.h,v 1.8 2003/06/02 23:28:20 millert Exp $    */
                      2: /*     $NetBSD: xdr_subs.h,v 1.11 1996/02/18 11:54:12 fvdl Exp $       */
                      3:
                      4: /*
                      5:  * Copyright (c) 1989, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * Rick Macklem at The University of Guelph.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. Neither the name of the University nor the names of its contributors
                     20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  *
                     35:  *     @(#)xdr_subs.h  8.3 (Berkeley) 3/30/95
                     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) { \
                     57:        (t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
                     58:        if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
                     59:                (t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
                     60:        else \
                     61:                (t)->tv_nsec = 0; \
                     62: }
                     63: #define        txdr_nfsv2time(f, t) { \
                     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: }
                     70:
                     71: #define        fxdr_nfsv3time(f, t) { \
                     72:        (t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
                     73:        (t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
                     74: }
                     75: #define        txdr_nfsv3time(f, t) { \
                     76:        ((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); \
                     77:        ((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); \
                     78: }
                     79:
                     80: #define        fxdr_hyper(f)                                           \
                     81:         ((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) |    \
                     82:         (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
                     83:
                     84:
                     85: #define        txdr_hyper(f, t) {                                              \
                     86:        ((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32));          \
                     87:        ((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff));   \
                     88: }
                     89:
                     90: #endif