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/*
* Copyright (c) 2009, Sun Microsystems, Inc.
* All rights reserved.
*
* 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 Sun Microsystems, 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.
*/
/*
* xdr_array.c, Generic XDR routines impelmentation.
*
* 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.
*/
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include "xdr_private.h"
/*
* 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 (XDR * xdrs,
caddr_t * addrp,
u_int * sizep,
u_int maxsize,
u_int elsize,
xdrproc_t elproc)
{
u_int i;
caddr_t target = *addrp;
u_int c; /* the actual element count */
bool_t stat = TRUE;
u_int nodesize;
/* like strings, arrays are really counted arrays */
if (!xdr_u_int (xdrs, sizep))
{
return FALSE;
}
c = *sizep;
if ((c > maxsize || UINT_MAX / elsize < c) && (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 = mem_alloc (nodesize);
if (target == NULL)
{
xdr_warnx ("xdr_array: out of memory");
errno = ENOMEM;
return FALSE;
}
memset (target, 0, nodesize);
break;
case XDR_FREE:
return TRUE;
case XDR_ENCODE:
break;
}
/*
* now we xdr each element of array
*/
for (i = 0; (i < c) && stat; i++)
{
stat = (*elproc) (xdrs, target);
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 (XDR * xdrs,
char *basep,
u_int nelem,
u_int elemsize,
xdrproc_t xdr_elem)
{
u_int i;
char *elptr;
elptr = basep;
for (i = 0; i < nelem; i++)
{
if (!(*xdr_elem) (xdrs, elptr))
{
return FALSE;
}
elptr += elemsize;
}
return TRUE;
}
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