/***************************************************************************
  *
  * File Name: xdrarray.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
 */
/*
 * 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
 */

/*
 * xdrarray.c, Generic XDR routines implementation.
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 *
 * These are the "non-trivial" xdr primitives used to serialize and de-serialize
 * arrays.  See xdr.h for more info on the interface to xdr.
 */

#define LASTUNSIGNED	((u_int)0-1)


/*
 * XDR an array of arbitrary elements
 * *addrp is a pointer to the array, *sizep is the number of elements.
 * If *addrp is NULL (*sizep * elsize) bytes are allocated.
 * elsize is the size (in bytes) of each element, and elproc is the
 * xdr procedure to call to handle each element of the array.
 */
bool_t
xdr_array(register XDR *xdrs,
	  caddr_t *addrp,	/* array pointer */
	  u_int *sizep,		/* number of elements */
	  u_int maxsize,	/* max numberof elements */
	  u_int elsize,		/* size in bytes of each element */
	  xdrproc_t elproc)	/* xdr routine to handle each element */
{
	register u_int i;
	register caddr_t target = *addrp;
	register u_int c;  /* the actual element count */
	register bool_t stat = TRUE;
	register u_int nodesize;

	/* like strings, arrays are really counted arrays */
	if (! xdr_u_int(xdrs, sizep)) {
		return (FALSE);
	}
	c = *sizep;
	if ((c > maxsize) && (xdrs->x_op != XDR_FREE)) {
		return (FALSE);
	}
	nodesize = c * elsize;

	/*
	 * if we are deserializing, we may need to allocate an array.
	 * We also save time by checking for a null array if we are freeing.
	 */
	if (target == NULL)
		switch (xdrs->x_op) {
		case XDR_DECODE:
			if (c == 0)
				return (TRUE);
			*addrp = target = (caddr_t)mem_alloc(nodesize);
			if (target == NULL) {
				(void) syslog(LOG_ERR, 
					"xdr_array: out of memory");
				return (FALSE);
			}
			(void) memset(target, 0, nodesize);
			break;

		case XDR_FREE:
			return (TRUE);
	}
	
	/*
	 * now we xdr each element of array
	 */
	for (i = 0; (i < c) && stat; i++) {
		stat = (*elproc)(xdrs, target, LASTUNSIGNED);
		target += elsize;
	}

	/*
	 * the array may need freeing
	 */
	if (xdrs->x_op == XDR_FREE) {
		mem_free(*addrp, nodesize);
		*addrp = NULL;
	}
	return (stat);
}

/*
 * xdr_vector():
 *
 * XDR a fixed length array. Unlike variable-length arrays,
 * the storage of fixed length arrays is static and unfreeable.
 * > basep: base of the array
 * > size: size of the array
 * > elemsize: size of each element
 * > xdr_elem: routine to XDR each element
 */
bool_t
xdr_vector(register XDR *xdrs,
	   register char *basep,
	   register u_int nelem,
	   register u_int elemsize,
	   register xdrproc_t xdr_elem)	
{
	register u_int i;
	register char *elptr;

	elptr = basep;
	for (i = 0; i < nelem; i++) {
		if (! (*xdr_elem)(xdrs, elptr, LASTUNSIGNED)) {
			return (FALSE);
		}
		elptr += elemsize;
	}
	return (TRUE);
}