164 lines
4.5 KiB
C
164 lines
4.5 KiB
C
/* $NetBSD: xdr_array.c,v 1.19 2013/03/11 20:19:29 tron Exp $ */
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/*
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* Copyright (c) 2010, Oracle America, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* * Neither the name of the "Oracle America, Inc." nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char *sccsid = "@(#)xdr_array.c 1.10 87/08/11 Copyr 1984 Sun Micro";
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static char *sccsid = "@(#)xdr_array.c 2.1 88/07/29 4.0 RPCSRC";
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#else
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__RCSID("$NetBSD: xdr_array.c,v 1.19 2013/03/11 20:19:29 tron Exp $");
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#endif
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#endif
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/*
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* xdr_array.c, Generic XDR routines implementation.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*
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* These are the "non-trivial" xdr primitives used to serialize and de-serialize
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* arrays. See xdr.h for more info on the interface to xdr.
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*/
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#include "namespace.h"
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#ifdef __weak_alias
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__weak_alias(xdr_array,_xdr_array)
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__weak_alias(xdr_vector,_xdr_vector)
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#endif
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/*
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* XDR an array of arbitrary elements
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* *addrp is a pointer to the array, *sizep is the number of elements.
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* If addrp is NULL (*sizep * elsize) bytes are allocated.
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* elsize is the size (in bytes) of each element, and elproc is the
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* xdr procedure to call to handle each element of the array.
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*/
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bool_t
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xdr_array(XDR *xdrs, caddr_t *addrp, u_int *sizep, u_int maxsize, u_int elsize,
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xdrproc_t elproc)
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{
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u_int i;
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caddr_t target = *addrp;
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u_int c; /* the actual element count */
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bool_t stat = TRUE;
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u_int nodesize;
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/* like strings, arrays are really counted arrays */
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if (!xdr_u_int(xdrs, sizep))
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return (FALSE);
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c = *sizep;
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if ((c > maxsize || UINT_MAX/elsize < c) &&
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(xdrs->x_op != XDR_FREE))
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return (FALSE);
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nodesize = c * elsize;
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/*
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* if we are deserializing, we may need to allocate an array.
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* We also save time by checking for a null array if we are freeing.
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*/
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if (target == NULL)
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switch (xdrs->x_op) {
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case XDR_DECODE:
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if (c == 0)
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return (TRUE);
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*addrp = target = mem_alloc(nodesize);
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if (target == NULL) {
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warn("%s: out of memory", __func__);
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return (FALSE);
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}
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memset(target, 0, nodesize);
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break;
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case XDR_FREE:
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return (TRUE);
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case XDR_ENCODE:
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break;
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}
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/*
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* now we xdr each element of array
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*/
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for (i = 0; (i < c) && stat; i++) {
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stat = (*elproc)(xdrs, target);
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target += elsize;
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}
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/*
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* the array may need freeing
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*/
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if (xdrs->x_op == XDR_FREE) {
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mem_free(*addrp, nodesize);
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*addrp = NULL;
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}
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return (stat);
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}
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/*
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* xdr_vector():
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*
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* XDR a fixed length array. Unlike variable-length arrays,
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* the storage of fixed length arrays is static and unfreeable.
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* > basep: base of the array
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* > size: size of the array
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* > elemsize: size of each element
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* > xdr_elem: routine to XDR each element
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*/
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bool_t
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xdr_vector(XDR *xdrs, char *basep, u_int nelem, u_int elemsize,
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xdrproc_t xdr_elem)
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{
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u_int i;
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char *elptr;
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elptr = basep;
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for (i = 0; i < nelem; i++) {
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if (!(*xdr_elem)(xdrs, elptr)) {
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return(FALSE);
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}
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elptr += elemsize;
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}
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return(TRUE);
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}
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