#include <machine/rtems-bsd-user-space.h>
/* $NetBSD: xdr_reference.c,v 1.13 2000/01/22 22:19:18 mycroft Exp $ */
/*-
* 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char *sccsid2 = "@(#)xdr_reference.c 1.11 87/08/11 SMI";
static char *sccsid = "@(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* xdr_reference.c, Generic XDR routines impelmentation.
*
* 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 "namespace.h"
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include "libc_private.h"
/*
* 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 sizeof the referneced structure.
* proc is the routine to handle the referenced structure.
*/
bool_t
xdr_reference(XDR *xdrs, caddr_t *pp, u_int size, xdrproc_t 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) mem_alloc(size);
if (loc == NULL) {
warnx("xdr_reference: out of memory");
return (FALSE);
}
memset(loc, 0, size);
break;
case XDR_ENCODE:
break;
}
stat = (*proc)(xdrs, loc);
if (xdrs->x_op == XDR_FREE) {
mem_free(loc, size);
*pp = NULL;
}
return (stat);
}
/*
* xdr_pointer():
*
* XDR a pointer to a possibly recursive data structure. This
* differs with xdr_reference in that it can serialize/deserialiaze
* 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(XDR *xdrs, char **objpp, u_int obj_size, xdrproc_t xdr_obj)
{
bool_t more_data;
more_data = (*objpp != NULL);
if (! xdr_bool(xdrs,&more_data)) {
return (FALSE);
}
if (! more_data) {
*objpp = NULL;
return (TRUE);
}
return (xdr_reference(xdrs,objpp,obj_size,xdr_obj));
}
