/***************************************************************************
  *
  * File Name: xdrrf.c
  *
  * Copyright (C) 1993-1996 Hewlett-Packard Company.  
  * All rights reserved.
  *
  * 11311 Chinden Blvd.
  * Boise, Idaho  83714
  *
  * This is a part of the HP JetAdmin Printer Utility
  *
  * This source code is only intended as a supplement for support and 
  * localization of HP JetAdmin by 3rd party Operating System vendors.
  * Modification of source code cannot be made without the express written
  * consent of Hewlett-Packard.
  *
  *	
  * Description: 
  *
  * Author:  Name 
  *        
  *
  * Modification history:
  *
  *     date      initials     change description
  *
  *   mm-dd-yy    MJB     	
  *
  *
  *
  *
  *
  *
  ***************************************************************************/

#include "rpsyshdr.h"
#include "rpcxdr.h"
#include "xdrext.h"

/*
 *  .unsupp/sys/_ became sxu
 *  machine/ became sxm
 *  sys/ became sx
 *  arpa/ became sx
 *  netinet/ became sx
 *  net/ became sx
 *  rpc/ became
 *  auth_ became aut
 *  auth became aut
 *  clnt_ became clnt
 *  nfsv3_ became nfs
 *  nfsv3 became nfs
 *  getrpc became gr
 *  pmap_ became pmap
 *  rpc_ became rpc
 *  svc_ became svc
 *  unix_ became ux
 *  unix became ux
 *  xdr_ became xdr
 *  reference became rf
 *  commondata became cd
 *  tablesize became tsz
 *  get_myaddress became gmyad
 *  bindresvport became brvp
 *  generic became gnc
 *  getmaps became map
 *  getport became port
 *  _prot became pro
 *  prot became pro
 *  simple became simp
 *  callmsg became call
 *  error became err
 *  stdsyms became syms
 *  socket became sock
 *  sysmacros became macs
 *  if_arp became ifarp
 *  errno became ern
 *  ioctl became ioct
 *  signal became sig
 *  param became parm
 *  types became typs
 */
/* @(#)xdrrf.c	2.1 88/07/29 4.0 RPCSRC */
/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user or with the express written consent of
 * Sun Microsystems, Inc.
 *
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 *
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 *
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 *
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 *
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */

/*
 * xdrrf.c, Generic XDR routines impelmentation.
 *
 * Copyright (C) 1987, Sun Microsystems, Inc.
 *
 * 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.
 */

#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 sizeof the referneced structure.
 * proc is the routine to handle the referenced structure.
 */
bool_t
xdr_reference(register 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 */
{
	register caddr_t loc = *pp;
	register 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) {
				(void) syslog(LOG_ERR,
				    "xdr_reference: out of memory");
				return (FALSE);
			}
			(void) memset(loc, 0, (int)size);
			break;
	}

	stat = (*proc)(xdrs, loc, LASTUNSIGNED);

	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(register 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));
}