xdr_stdio.c

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/*
 * Copyright (c) 2009, Sun Microsystems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of Sun Microsystems, Inc. nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
 
//#include <sys/cdefs.h>
 
/*
 * 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 <wintirpc.h>
#include "namespace.h"
#include <stdio.h>
 
//#include <arpa/inet.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include "un-namespace.h"
 
static void xdrstdio_destroy(XDR *);
static bool_t xdrstdio_getlong(XDR *, long *);
static bool_t xdrstdio_putlong(XDR *, const long *);
static bool_t xdrstdio_getbytes(XDR *, char *, u_int);
static bool_t xdrstdio_putbytes(XDR *, const char *, u_int);
static u_int xdrstdio_getpos(XDR *);
static bool_t xdrstdio_setpos(XDR *, u_int);
static int32_t *xdrstdio_inline(XDR *, u_int);
 
/*
 * Ops vector for stdio type XDR
 */
static const 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)
    XDR *xdrs;
    FILE *file;
    enum xdr_op op;
{
 
    xdrs->x_op = op;
    xdrs->x_ops = &xdrstdio_ops;
    xdrs->x_private = 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)
    XDR *xdrs;
{
    (void)fflush((FILE *)xdrs->x_private);
        /* XXX: should we close the file ?? */
}
 
static bool_t
xdrstdio_getlong(xdrs, lp)
    XDR *xdrs;
    long *lp;
{
 
    if (fread(lp, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1)
        return (FALSE);
    *lp = (long)ntohl((u_int32_t)*lp);
    return (TRUE);
}
 
static bool_t
xdrstdio_putlong(xdrs, lp)
    XDR *xdrs;
    const long *lp;
{
    long mycopy = (long)htonl((u_int32_t)*lp);
 
    if (fwrite(&mycopy, sizeof(int32_t), 1, (FILE *)xdrs->x_private) != 1)
        return (FALSE);
    return (TRUE);
}
 
static bool_t
xdrstdio_getbytes(xdrs, addr, len)
    XDR *xdrs;
    char *addr;
    u_int len;
{
 
    if ((len != 0) && (fread(addr, (size_t)len, 1, (FILE *)xdrs->x_private) != 1))
        return (FALSE);
    return (TRUE);
}
 
static bool_t
xdrstdio_putbytes(xdrs, addr, len)
    XDR *xdrs;
    const char *addr;
    u_int len;
{
 
    if ((len != 0) && (fwrite(addr, (size_t)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);
}
 
/* ARGSUSED */
static int32_t *
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);
}