glibc/sunrpc/xdr_array.c
Andreas Jaeger 021db4be6f Make sunrpc code usable again
New configure option --enable-obsolete-rpc makes the deprecated RPC
  headers and functions available at compile time as they were before
  version 2.14.  This option will be removed at some time in the future
  after the TI-RPC library becomes fully sufficient for the needs of
  existing applications.
2012-05-10 20:19:53 +02:00

166 lines
4.7 KiB
C

/*
* xdr_array.c, Generic XDR routines implementation.
*
* Copyright (c) 2010, Oracle America, Inc.
*
* 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 the "Oracle America, 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.
*
* 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 <stdio.h>
#include <string.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <libintl.h>
#include <limits.h>
#include <wchar.h>
#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 (xdrs, addrp, sizep, maxsize, elsize, elproc)
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 */
{
u_int i;
caddr_t target = *addrp;
u_int c; /* the actual element count */
bool_t stat = TRUE;
/* like strings, arrays are really counted arrays */
if (!xdr_u_int (xdrs, sizep))
{
return FALSE;
}
c = *sizep;
/*
* XXX: Let the overflow possibly happen with XDR_FREE because mem_free()
* doesn't actually use its second argument anyway.
*/
if ((c > maxsize || c > UINT_MAX / elsize) && (xdrs->x_op != XDR_FREE))
{
return FALSE;
}
/*
* 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 = calloc (c, elsize);
if (target == NULL)
{
(void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n"));
return FALSE;
}
break;
case XDR_FREE:
return TRUE;
default:
break;
}
/*
* 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, c * elsize);
*addrp = NULL;
}
return stat;
}
#ifdef EXPORT_RPC_SYMBOLS
libc_hidden_def (xdr_array)
#else
libc_hidden_nolink_sunrpc (xdr_array, GLIBC_2_0)
#endif
/*
* 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 (xdrs, basep, nelem, elemsize, xdr_elem)
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, LASTUNSIGNED))
{
return FALSE;
}
elptr += elemsize;
}
return TRUE;
}
libc_hidden_nolink_sunrpc (xdr_vector, GLIBC_2_0)