xref: /illumos-gate/usr/src/common/mdesc/mdesc_getpropdata.c (revision 9164a50bf932130cbb5097a16f6986873ce0e6e5)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #include <sys/types.h>
28 #include <sys/mdesc.h>
29 #include <sys/mdesc_impl.h>
30 
31 int
32 md_get_prop_data(md_t *ptr, mde_cookie_t node, char *namep,
33 	uint8_t **datap, int *lenp)
34 {
35 	mde_str_cookie_t prop_name;
36 	md_impl_t *mdp;
37 	mde_cookie_t	elem;
38 
39 	mdp = (md_impl_t *)ptr;
40 
41 	if (node == MDE_INVAL_ELEM_COOKIE) {
42 		return (-1);
43 	}
44 
45 	prop_name = md_find_name(ptr, namep);
46 	if (prop_name == MDE_INVAL_STR_COOKIE) {
47 		return (-1);
48 	}
49 
50 	elem = md_find_node_prop(mdp, node, prop_name, MDET_PROP_DAT);
51 
52 	if (elem != MDE_INVAL_ELEM_COOKIE) {
53 		md_element_t *mdep;
54 		mdep = &(mdp->mdep[(int)elem]);
55 
56 		*lenp = (int)MDE_PROP_DATA_LEN(mdep);
57 		*datap = mdp->datap+(int)MDE_PROP_DATA_OFFSET(mdep);
58 		return (0);
59 	}
60 
61 	return (-1);	/* no such property name */
62 }
63