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xdr_stdi.c

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/*********************************************************************
 * RPC for the Windows NT Operating System
 * 1993 by Martin F. Gergeleit
 * Users may use, copy or modify Sun RPC for the Windows NT Operating
 * System according to the Sun copyright below.
 *
 * RPC for the Windows NT Operating System COMES WITH ABSOLUTELY NO
 * WARRANTY, NOR WILL I BE LIABLE FOR ANY DAMAGES INCURRED FROM THE
 * USE OF. USE ENTIRELY AT YOUR OWN RISK!!!
 *********************************************************************/

/* @(#)xdr_stdio.c      2.1 88/07/29 4.0 RPCSRC */
/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 *
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 *
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 *
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 *
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 *
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)xdr_stdio.c 1.16 87/08/11 Copyr 1984 Sun Micro";
#endif

/*
 * xdr_stdio.c, XDR implementation on standard i/o file.
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 *
 * This set of routines implements a XDR on a stdio stream.
 * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes
 * from the stream.
 */

#include <stdio.h>
#include <stdlib.h>             /* malloc(), free() */

#ifdef UNDER_CE
#include <windows.h>
#include <winsock.h>
#else
#include <winsock2.h>           /* ntohl(), htonl() */
#endif

#include "xdr.h"

static bool_t   xdrstdio_getlong();
static bool_t   xdrstdio_putlong();
static bool_t   xdrstdio_getbytes();
static bool_t   xdrstdio_putbytes();
static u_int    xdrstdio_getpos();
static bool_t   xdrstdio_setpos();
static long *   xdrstdio_inline();
static void     xdrstdio_destroy();

/*
 * Ops vector for stdio type XDR
 */
static struct xdr_ops   xdrstdio_ops = {
        xdrstdio_getlong,       /* deseraialize a long int */
        xdrstdio_putlong,       /* seraialize a long int */
        xdrstdio_getbytes,      /* deserialize counted bytes */
        xdrstdio_putbytes,      /* serialize counted bytes */
        xdrstdio_getpos,        /* get offset in the stream */
        xdrstdio_setpos,        /* set offset in the stream */
        xdrstdio_inline,        /* prime stream for inline macros */
        xdrstdio_destroy        /* destroy stream */
};

/*
 * Initialize a stdio xdr stream.
 * Sets the xdr stream handle xdrs for use on the stream file.
 * Operation flag is set to op.
 */
void
xdrstdio_create(xdrs, file, op)
        register XDR *xdrs;
        FILE *file;
        enum xdr_op op;
{

        xdrs->x_op = op;
        xdrs->x_ops = &xdrstdio_ops;
        xdrs->x_private = (caddr_t)file;
        xdrs->x_handy = 0;
        xdrs->x_base = 0;
}

/*
 * Destroy a stdio xdr stream.
 * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create.
 */
static void
xdrstdio_destroy(xdrs)
        register XDR *xdrs;
{
        (void)fflush((FILE *)xdrs->x_private);
        /* xx should we close the file ?? */
};

static bool_t
xdrstdio_getlong(xdrs, lp)
        XDR *xdrs;
        register long *lp;
{

        if (fread((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1)
                return (FALSE);
#ifndef mc68000
        *lp = ntohl(*lp);
#endif
        return (TRUE);
}

static bool_t
xdrstdio_putlong(xdrs, lp)
        XDR *xdrs;
        long *lp;
{

#ifndef mc68000
        long mycopy = htonl(*lp);
        lp = &mycopy;
#endif
        if (fwrite((caddr_t)lp, sizeof(long), 1, (FILE *)xdrs->x_private) != 1)
                return (FALSE);
        return (TRUE);
}

static bool_t
xdrstdio_getbytes(xdrs, addr, len)
        XDR *xdrs;
        caddr_t addr;
        u_int len;
{

        if ((len != 0) && (fread(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
                return (FALSE);
        return (TRUE);
}

static bool_t
xdrstdio_putbytes(xdrs, addr, len)
        XDR *xdrs;
        caddr_t addr;
        u_int len;
{

        if ((len != 0) && (fwrite(addr, (int)len, 1, (FILE *)xdrs->x_private) != 1))
                return (FALSE);
        return (TRUE);
}

static u_int
xdrstdio_getpos(xdrs)
        XDR *xdrs;
{

        return ((u_int) ftell((FILE *)xdrs->x_private));
}

static bool_t
xdrstdio_setpos(xdrs, pos)
        XDR *xdrs;
        u_int pos;
{

        return ((fseek((FILE *)xdrs->x_private, (long)pos, 0) < 0) ?
                FALSE : TRUE);
}

static long *
xdrstdio_inline(xdrs, len)
        XDR *xdrs;
        u_int len;
{

        /*
         * Must do some work to implement this: must insure
         * enough data in the underlying stdio buffer,
         * that the buffer is aligned so that we can indirect through a
         * long *, and stuff this pointer in xdrs->x_buf.  Doing
         * a fread or fwrite to a scratch buffer would defeat
         * most of the gains to be had here and require storage
         * management on this buffer, so we don't do this.
         */
        return (NULL);
}

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