usr/src/common/mdesc/mdesc_getpropdata.c

   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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/types.h>
  30 #include <sys/mdesc.h>
  31 #include <sys/mdesc_impl.h>
  32
  33 int
  34 md_get_prop_data(md_t *ptr, mde_cookie_t node, char *namep,
  35         uint8_t **datap, int *lenp)
  36 {
  37         mde_str_cookie_t prop_name;
  38         md_impl_t *mdp;
  39         mde_cookie_t    elem;
  40
  41         mdp = (md_impl_t *)ptr;
  42
  43         if (node == MDE_INVAL_ELEM_COOKIE) {
  44                 return (-1);
  45         }
  46
  47         prop_name = md_find_name(ptr, namep);
  48         if (prop_name == MDE_INVAL_STR_COOKIE) {
  49                 return (-1);
  50         }
  51
  52         elem = md_find_node_prop(mdp, node, prop_name, MDET_PROP_DAT);
  53
  54         if (elem != MDE_INVAL_ELEM_COOKIE) {
  55                 md_element_t *mdep;
  56                 mdep = &(mdp->mdep[(int)elem]);
  57
  58                 *lenp = (int)MDE_PROP_DATA_LEN(mdep);
  59                 *datap = mdp->datap+(int)MDE_PROP_DATA_OFFSET(mdep);
  60                 return (0);
  61         }
  62
  63         return (-1);    /* no such property name */
  64 }