f0a75d274a
ZFS file system was ported from OpenSolaris operating system. The code in under CDDL license. I'd like to thank all SUN developers that created this great piece of software. Supported by: Wheel LTD (http://www.wheel.pl/) Supported by: The FreeBSD Foundation (http://www.freebsdfoundation.org/) Supported by: Sentex (http://www.sentex.net/)
124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
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/* All Rights Reserved */
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/*
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* Portions of this source code were derived from Berkeley 4.3 BSD
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* under license from the Regents of the University of California.
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*/
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#pragma ident "%Z%%M% %I% %E% SMI"
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/*
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* xdr_array.c, Generic XDR routines impelmentation.
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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 <sys/param.h>
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#include <sys/cmn_err.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#define LASTUNSIGNED ((uint_t)0-1)
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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, uint_t *sizep, const uint_t maxsize,
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const uint_t elsize, const xdrproc_t elproc)
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{
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uint_t i;
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caddr_t target = *addrp;
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uint_t c; /* the actual element count */
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bool_t stat = TRUE;
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uint_t 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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#ifdef DEBUG
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printf("xdr_array: size FAILED\n");
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#endif
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return (FALSE);
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}
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c = *sizep;
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if ((c > maxsize || LASTUNSIGNED / elsize < c) &&
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xdrs->x_op != XDR_FREE) {
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#ifdef DEBUG
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printf("xdr_array: bad size FAILED\n");
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#endif
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return (FALSE);
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}
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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 = (char *)mem_alloc(nodesize);
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bzero(target, 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, LASTUNSIGNED);
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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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