path: root/sunrpc/xdr.c

/* @(#)xdr.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.
 *
 * 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
 */
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)xdr.c 1.35 87/08/12";
#endif

/*
 * xdr.c, Generic XDR routines implementation.
 *
 * Copyright (C) 1986, Sun Microsystems, Inc.
 *
 * These are the "generic" xdr routines used to serialize and de-serialize
 * most common data items.  See xdr.h for more info on the interface to
 * xdr.
 */

#include <stdio.h>
#include <limits.h>
#include <string.h>

#include <rpc/types.h>
#include <rpc/xdr.h>

/*
 * constants specific to the xdr "protocol"
 */
#define XDR_FALSE	((long) 0)
#define XDR_TRUE	((long) 1)
#define LASTUNSIGNED	((u_int) 0-1)

/*
 * for unit alignment
 */
static const char xdr_zero[BYTES_PER_XDR_UNIT] = {0, 0, 0, 0};

/*
 * Free a data structure using XDR
 * Not a filter, but a convenient utility nonetheless
 */
void
xdr_free (xdrproc_t proc, char *objp)
{
  XDR x;

  x.x_op = XDR_FREE;
  (*proc) (&x, objp);
}

/*
 * XDR nothing
 */
bool_t
xdr_void (void)
{
  return TRUE;
}

/*
 * XDR integers
 */
bool_t
xdr_int (XDR *xdrs, int *ip)
{

#if INT_MAX < LONG_MAX
  long l;

  switch (xdrs->x_op)
    {
    case XDR_ENCODE:
      l = (long) *ip;
      return XDR_PUTLONG (xdrs, &l);

    case XDR_DECODE:
      if (!XDR_GETLONG (xdrs, &l))
	{
	  return FALSE;
	}
      *ip = (int) l;
    case XDR_FREE:
      return TRUE;
    }
  return FALSE;
#elif INT_MAX == LONG_MAX
  return xdr_long (xdrs, (long *) ip);
#elif INT_MAX == SHRT_MAX
  return xdr_short (xdrs, (short *) ip);
#else
#error unexpected integer sizes in_xdr_int()
#endif
}

/*
 * XDR unsigned integers
 */
bool_t
xdr_u_int (XDR *xdrs, u_int *up)
{
#if UINT_MAX < ULONG_MAX
  u_long l;

  switch (xdrs->x_op)
    {
    case XDR_ENCODE:
      l = (u_long) * up;
      return XDR_PUTLONG (xdrs, &l);

    case XDR_DECODE:
      if (!XDR_GETLONG (xdrs, &l))
	{
	  return FALSE;
	}
      *up = (u_int) l;