144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
/* $NetBSD: xdr_reference.c,v 1.13 2000/01/22 22:19:18 mycroft Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2010, Oracle America, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* * Neither the name of the "Oracle America, Inc." nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid2 = "@(#)xdr_reference.c 1.11 87/08/11 SMI";
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static char *sccsid = "@(#)xdr_reference.c 2.1 88/07/29 4.0 RPCSRC";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* xdr_reference.c, Generic XDR routines implementation.
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*
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* These are the "non-trivial" xdr primitives used to serialize and de-serialize
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* "pointers". See xdr.h for more info on the interface to xdr.
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*/
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#include "namespace.h"
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include "libc_private.h"
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/*
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* XDR an indirect pointer
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* xdr_reference is for recursively translating a structure that is
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* referenced by a pointer inside the structure that is currently being
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* translated. pp references a pointer to storage. If *pp is null
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* the necessary storage is allocated.
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* size is the sizeof the referneced structure.
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* proc is the routine to handle the referenced structure.
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*/
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bool_t
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xdr_reference(XDR *xdrs, caddr_t *pp, u_int size, xdrproc_t proc)
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/*
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* XDR *xdrs;
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* caddr_t *pp; // the pointer to work on
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* u_int size; // size of the object pointed to
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* xdrproc_t proc; // xdr routine to handle the object
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*/
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{
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caddr_t loc = *pp;
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bool_t stat;
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if (loc == NULL)
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switch (xdrs->x_op) {
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case XDR_FREE:
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return (TRUE);
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case XDR_DECODE:
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*pp = loc = (caddr_t) mem_alloc(size);
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if (loc == NULL) {
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warnx("xdr_reference: out of memory");
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return (FALSE);
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}
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memset(loc, 0, size);
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break;
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case XDR_ENCODE:
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break;
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}
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stat = (*proc)(xdrs, loc);
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if (xdrs->x_op == XDR_FREE) {
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mem_free(loc, size);
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*pp = NULL;
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}
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return (stat);
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}
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/*
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* xdr_pointer():
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*
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* XDR a pointer to a possibly recursive data structure. This
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* differs with xdr_reference in that it can serialize/deserialiaze
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* trees correctly.
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*
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* What's sent is actually a union:
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*
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* union object_pointer switch (boolean b) {
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* case TRUE: object_data data;
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* case FALSE: void nothing;
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* }
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*
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* > objpp: Pointer to the pointer to the object.
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* > obj_size: size of the object.
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* > xdr_obj: routine to XDR an object.
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*
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*/
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bool_t
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xdr_pointer(XDR *xdrs, char **objpp, u_int obj_size, xdrproc_t xdr_obj)
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{
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bool_t more_data;
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more_data = (*objpp != NULL);
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if (! xdr_bool(xdrs,&more_data)) {
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return (FALSE);
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}
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if (! more_data) {
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*objpp = NULL;
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return (TRUE);
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}
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return (xdr_reference(xdrs,objpp,obj_size,xdr_obj));
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}
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