diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/rpc/xdr_array.c')
-rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/rpc/xdr_array.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/rpc/xdr_array.c b/sys/cddl/contrib/opensolaris/uts/common/rpc/xdr_array.c new file mode 100644 index 0000000..3711e53 --- /dev/null +++ b/sys/cddl/contrib/opensolaris/uts/common/rpc/xdr_array.c @@ -0,0 +1,123 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2004 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ +/* All Rights Reserved */ + +/* + * Portions of this source code were derived from Berkeley 4.3 BSD + * under license from the Regents of the University of California. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +/* + * xdr_array.c, Generic XDR routines impelmentation. + * 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 <sys/param.h> +#include <sys/cmn_err.h> +#include <sys/types.h> +#include <sys/systm.h> + +#include <rpc/types.h> +#include <rpc/xdr.h> + +#define LASTUNSIGNED ((uint_t)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(XDR *xdrs, caddr_t *addrp, uint_t *sizep, const uint_t maxsize, + const uint_t elsize, const xdrproc_t elproc) +{ + uint_t i; + caddr_t target = *addrp; + uint_t c; /* the actual element count */ + bool_t stat = TRUE; + uint_t nodesize; + + /* like strings, arrays are really counted arrays */ + if (!xdr_u_int(xdrs, sizep)) { +#ifdef DEBUG + printf("xdr_array: size FAILED\n"); +#endif + return (FALSE); + } + c = *sizep; + if ((c > maxsize || LASTUNSIGNED / elsize < c) && + xdrs->x_op != XDR_FREE) { +#ifdef DEBUG + printf("xdr_array: bad size FAILED\n"); +#endif + 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 = (char *)mem_alloc(nodesize); + bzero(target, 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, LASTUNSIGNED); + target += elsize; + } + + /* + * the array may need freeing + */ + if (xdrs->x_op == XDR_FREE) { + mem_free(*addrp, nodesize); + *addrp = NULL; + } + return (stat); +} |