freebsd-dev/sys/sun4v/cddl/mdesc/mdesc_findnodeprop.c
2006-11-24 01:56:46 +00:00

77 lines
1.9 KiB
C

/*
* 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
* $FreeBSD$
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <machine/cddl/mdesc.h>
#include <machine/cddl/mdesc_impl.h>
mde_cookie_t
md_find_node_prop(md_impl_t *mdp,
mde_cookie_t node,
mde_str_cookie_t prop_name,
int tag_type)
{
md_element_t *mdep;
int idx;
if (node == MDE_INVAL_ELEM_COOKIE ||
prop_name == MDE_INVAL_STR_COOKIE) {
return (MDE_INVAL_ELEM_COOKIE);
}
idx = (int)node;
mdep = &(mdp->mdep[idx]);
/* Skip over any empty elements */
while (MDE_TAG(mdep) == MDET_NULL) {
idx++;
mdep++;
}
/* see if cookie is infact a node */
if (MDE_TAG(mdep) != MDET_NODE) {
return (MDE_INVAL_ELEM_COOKIE);
}
/*
* Simply walk the elements in the node
* looking for a property with a matching name.
*/
for (idx++, mdep++; MDE_TAG(mdep) != MDET_NODE_END; idx++, mdep++) {
if (MDE_TAG(mdep) == tag_type) {
if (MDE_NAME(mdep) == prop_name) {
return ((mde_cookie_t)idx);
}
}
}
return (MDE_INVAL_ELEM_COOKIE); /* no such property name */
}