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[unix-history] / usr / src / sys / nfs / xdr_subs.h

/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* %sccs.include.redist.c%
*
*      @(#)xdr_subs.h  7.6 (Berkeley) %G%
*/

/*
* Macros used for conversion to/from xdr representation by nfs...
* These use the MACHINE DEPENDENT routines ntohl, htonl
* As defined by "XDR: External Data Representation Standard" RFC1014
*/
#if BYTE_ORDER == LITTLE_ENDIAN
#define fxdr_unsigned(t, v)     ((t)ntohl((long)(v)))
#define fxdr_nfstime(f, t) { \
       (t)->ts_sec = \
               ntohl(((struct nfsv2_time *)(f))->nfs_sec); \
       (t)->ts_nsec = 1000 * \
               ntohl(((struct nfsv2_time *)(f))->nfs_usec); \
}

#define fxdr_nqtime(f, t) { \
       (t)->ts_sec = \
               ntohl(((struct nqnfs_time *)(f))->nq_sec); \
       (t)->ts_nsec = \
               ntohl(((struct nqnfs_time *)(f))->nq_nsec); \
}

/*
* To handle quad conversions, define a struct of two longs and use
* ntohl and htonl. Maybe someday there should be ntohq and htonq?
*/
union _hq {
       quad_t  hq;
       struct {
               long val[2];
       } lq;
};
#define fxdr_hyper(f, t) { \
       ((union _hq *)(t))->lq.val[1] = ntohl(((union _hq *)(f))->lq.val[0]); \
       ((union _hq *)(t))->lq.val[0] = ntohl(((union _hq *)(f))->lq.val[1]); \
}
#define txdr_hyper(f, t) { \
       ((union _hq *)(t))->lq.val[0] = htonl(((union _hq *)(f))->lq.val[1]); \
       ((union _hq *)(t))->lq.val[1] = htonl(((union _hq *)(f))->lq.val[0]); \
}

#define txdr_unsigned(v)        (htonl((long)(v)))
#define txdr_nqtime(f, t) { \
       ((struct nqnfs_time *)(t))->nq_sec = \
               htonl((f)->ts_sec); \
       ((struct nqnfs_time *)(t))->nq_nsec = \
               htonl((f)->ts_nsec); \
}
#define txdr_nfstime(f, t) { \
       ((struct nfsv2_time *)(t))->nfs_sec = \
               htonl((f)->ts_sec); \
       ((struct nfsv2_time *)(t))->nfs_usec = \
               htonl((f)->ts_nsec) / 1000; \
}
#else   /* BIG_ENDIAN */
#define fxdr_unsigned(t, v)     ((t)(v))
#define fxdr_nqtime(f, t) \
       *(t) = *((struct timespec *)(f))
#define fxdr_nfstime(f, t) { \
       (t)->ts_sec = ((struct nfsv2_time *)(f))->nfs_sec; \
       (t)->ts_nsec = ((struct nfsv2_time *)(f))->nfs_usec * 1000; \
}
#define fxdr_hyper(f, t) \
       *((quad_t *)(t)) = *((quad_t *)(f))

#define txdr_unsigned(v)        ((long)(v))
#define txdr_nqtime(f, t) \
       *(t) = *((struct nqnfs_time *)(f))
#define txdr_nfstime(f, t) { \
       ((struct nfsv2_time *)(t))->nfs_sec = (f)->ts_sec; \
       ((struct nfsv2_time *)(t))->nfs_usec = (f)->ts_nsec / 1000; \
}
#define txdr_hyper(f, t) \
       *((quad_t *)(t)) = *((quad_t *)(f))
#endif  /* ENDIAN */