#include <machine/rtems-bsd-user-space.h>
/*-
* Copyright (c) 2010, Oracle America, Inc.
*
* 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 the "Oracle America, 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.
*/
/*
* xdr_sizeof.c
*
* General purpose routine to see how much space something will use
* when serialized using XDR.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "namespace.h"
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <sys/types.h>
#include <stdlib.h>
#include "un-namespace.h"
/* ARGSUSED */
static bool_t
x_putlong(XDR *xdrs, const long *longp)
{
xdrs->x_handy += BYTES_PER_XDR_UNIT;
return (TRUE);
}
/* ARGSUSED */
static bool_t
x_putbytes(XDR *xdrs, const char *bp, u_int len)
{
xdrs->x_handy += len;
return (TRUE);
}
static u_int
x_getpostn(XDR *xdrs)
{
return (xdrs->x_handy);
}
/* ARGSUSED */
static bool_t
x_setpostn(XDR *xdrs, u_int pos)
{
/* This is not allowed */
return (FALSE);
}
static int32_t *
x_inline(XDR *xdrs, u_int len)
{
if (len == 0) {
return (NULL);
}
if (xdrs->x_op != XDR_ENCODE) {
return (NULL);
}
if (len < (u_int)(uintptr_t)xdrs->x_base) {
/* x_private was already allocated */
xdrs->x_handy += len;
return ((int32_t *) xdrs->x_private);
} else {
/* Free the earlier space and allocate new area */
if (xdrs->x_private)
free(xdrs->x_private);
if ((xdrs->x_private = (caddr_t) malloc(len)) == NULL) {
xdrs->x_base = 0;
return (NULL);
}
xdrs->x_base = (caddr_t)(uintptr_t)len;
xdrs->x_handy += len;
return ((int32_t *) xdrs->x_private);
}
}
static int
harmless(void)
{
/* Always return FALSE/NULL, as the case may be */
return (0);
}
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;
}
return;
}
unsigned long
xdr_sizeof(xdrproc_t func, void *data)
{
XDR x;
struct xdr_ops ops;
bool_t stat;
/* to stop ANSI-C compiler from complaining */
typedef bool_t (* dummyfunc1)(XDR *, long *);
typedef bool_t (* dummyfunc2)(XDR *, caddr_t, u_int);
ops.x_putlong = x_putlong;
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;
/* the other harmless ones */
ops.x_getlong = (dummyfunc1) harmless;
ops.x_getbytes = (dummyfunc2) harmless;
x.x_op = XDR_ENCODE;
x.x_ops = &ops;
x.x_handy = 0;
x.x_private = (caddr_t) NULL;
x.x_base = (caddr_t) 0;
stat = func(&x, data);
if (x.x_private)
free(x.x_private);
return (stat == TRUE ? (unsigned) x.x_handy: 0);
}
