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/*
* xdr_reference.c, Generic XDR routines implementation.
*
* 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.
*
* These are the "non-trivial" xdr primitives used to serialize and
* de-serialize "pointers". See xdr.h for more info on the interface to xdr.
*/
#include <stdio.h>
#include <string.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <libintl.h>
#ifdef USE_IN_LIBIO
# include <wchar.h>
# include <libio/iolibio.h>
#endif
#define LASTUNSIGNED ((u_int)0-1)
/*
* XDR an indirect pointer
* xdr_reference is for recursively translating a structure that is
* referenced by a pointer inside the structure that is currently being
* translated. pp references a pointer to storage. If *pp is null
* the necessary storage is allocated.
* size is the size of the referneced structure.
* proc is the routine to handle the referenced structure.
*/
bool_t
xdr_reference (xdrs, pp, size, proc)
XDR *xdrs;
caddr_t *pp; /* the pointer to work on */
u_int size; /* size of the object pointed to */
xdrproc_t proc; /* xdr routine to handle the object */
{
caddr_t loc = *pp;
bool_t stat;
if (loc == NULL)
switch (xdrs->x_op)
{
case XDR_FREE:
return TRUE;
case XDR_DECODE:
*pp = loc = (caddr_t) calloc (1, size);
if (loc == NULL)
{
(void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n"));
return FALSE;
}
break;
default:
break;
}
stat = (*proc) (xdrs, loc, LASTUNSIGNED);
if (xdrs->x_op == XDR_FREE)
{
mem_free (loc, size);
*pp = NULL;
}
return stat;
}
INTDEF(xdr_reference)
/*
* xdr_pointer():
*
* XDR a pointer to a possibly recursive data structure. This
* differs with xdr_reference in that it can serialize/deserialize
* trees correctly.
*
* What's sent is actually a union:
*
* union object_pointer switch (boolean b) {
* case TRUE: object_data data;
* case FALSE: void nothing;
* }
*
* > objpp: Pointer to the pointer to the object.
* > obj_size: size of the object.
* > xdr_obj: routine to XDR an object.
*
*/
bool_t
xdr_pointer (xdrs, objpp, obj_size, xdr_obj)
XDR *xdrs;
char **objpp;
u_int obj_size;
xdrproc_t xdr_obj;
{
bool_t more_data;
more_data = (*objpp != NULL);
if (!INTUSE(xdr_bool) (xdrs, &more_data))
{
return FALSE;
}
if (!more_data)
{
*objpp = NULL;
return TRUE;
}
return INTUSE(xdr_reference) (xdrs, objpp, obj_size, xdr_obj);
}
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