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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* General purpose routine to see how much space something will use
* when serialized using XDR.
*/
#include "mt.h"
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <sys/types.h>
#include <stdlib.h>
/* ARGSUSED1 */
static bool_t
x_putlong(XDR *xdrs, long *ip)
{
xdrs->x_handy += BYTES_PER_XDR_UNIT;
return (TRUE);
}
#if defined(_LP64)
/* ARGSUSED1 */
static bool_t
x_putint32_t(XDR *xdrs, int32_t *ip)
{
xdrs->x_handy += BYTES_PER_XDR_UNIT;
return (TRUE);
}
#endif
/* ARGSUSED */
static bool_t
x_putbytes(XDR *xdrs, char *bp, int len)
{
xdrs->x_handy += len;
return (TRUE);
}
static uint_t
x_getpostn(XDR *xdrs)
{
return (xdrs->x_handy);
}
/* ARGSUSED */
static bool_t
x_setpostn(XDR *xdrs, uint_t pos)
{
/* This is not allowed */
return (FALSE);
}
static rpc_inline_t *
x_inline(XDR *xdrs, int len)
{
if (len == 0)
return (NULL);
if (xdrs->x_op != XDR_ENCODE)
return (NULL);
if (len < (intptr_t)xdrs->x_base) {
/* x_private was already allocated */
xdrs->x_handy += len;
/* LINTED pointer cast */
return ((rpc_inline_t *)xdrs->x_private);
}
/* Free the earlier space and allocate new area */
if (xdrs->x_private)
free(xdrs->x_private);
if ((xdrs->x_private = malloc(len)) == NULL) {
xdrs->x_base = 0;
return (NULL);
}
xdrs->x_base = (caddr_t)(intptr_t)len;
xdrs->x_handy += len;
/* LINTED pointer cast */
return ((rpc_inline_t *)xdrs->x_private);
}
static bool_t
harmless_getlong(XDR *xdr __unused, long *l __unused)
{
/* Always return FALSE/NULL, as the case may be */
return (FALSE);
}
static bool_t
harmless_getbytes(XDR *xdr __unused, caddr_t p __unused, int i __unused)
{
return (FALSE);
}
#if defined(_LP64)
static bool_t
harmless_getint32(XDR *xdr __unused, int32_t *p __unused)
{
return (FALSE);
}
#endif
static void
x_destroy(XDR *xdrs)
{
xdrs->x_handy = 0;
xdrs->x_base = 0;
if (xdrs->x_private) {
free(xdrs->x_private);
xdrs->x_private = NULL;
}
}
uint_t
xdr_sizeof(xdrproc_t func, void *data)
{
XDR x;
struct xdr_ops ops;
bool_t stat;
/* to stop ANSI-C compiler from complaining */
ops.x_putlong = x_putlong;
ops.x_getlong = harmless_getlong;
ops.x_putbytes = x_putbytes;
ops.x_inline = x_inline;
ops.x_getpostn = x_getpostn;
ops.x_setpostn = x_setpostn;
ops.x_destroy = x_destroy;
#if defined(_LP64)
ops.x_getint32 = harmless_getint32;
ops.x_putint32 = x_putint32_t;
#endif
/* the other harmless ones */
ops.x_getbytes = harmless_getbytes;
x.x_op = XDR_ENCODE;
x.x_ops = &ops;
x.x_handy = 0;
x.x_private = NULL;
x.x_base = NULL;
stat = func(&x, data);
if (x.x_private)
free(x.x_private);
return (stat == TRUE ? (uint_t)x.x_handy : 0);
}
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