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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/types.h> 29 #include <sys/mdesc.h> 30 #include <sys/mdesc_impl.h> 31 32 static int md_find_node_arcs(md_impl_t *, mde_cookie_t, mde_str_cookie_t, int, 33 mde_cookie_t *, size_t); 34 35 36 /* 37 * Return an array containing the node indexes for the arcs in 38 * the given node. The array is allocated using the allocator 39 * defined at machine description initialization time and the 40 * number of arcs found returned. 41 * 42 * Input Description 43 * ------------------- ---------------------------------------- 44 * md_t * Pointer to md session 45 * mde_cookie_t Node containing arcs 46 * char * Arc name to count (e.g. "fwd" or "back") 47 * mde_cookie_t * Buffer to store indexes, or NULL 48 * size_t Size of buffer 49 * 50 * Output Description 51 * ------------------- ---------------------------------------- 52 * int Count of arcs in node 53 */ 54 int 55 md_get_prop_arcs(md_t *ptr, mde_cookie_t node, char *namep, mde_cookie_t *arcp, 56 size_t arcsize) 57 { 58 int result; 59 mde_str_cookie_t prop_name; 60 md_impl_t *mdp; 61 62 mdp = (md_impl_t *)ptr; 63 64 if (node == MDE_INVAL_ELEM_COOKIE) { 65 return (-1); 66 } 67 68 prop_name = md_find_name(ptr, namep); 69 if (prop_name == MDE_INVAL_STR_COOKIE) { 70 return (-1); 71 } 72 73 result = md_find_node_arcs(mdp, node, prop_name, MDET_PROP_ARC, arcp, 74 arcsize); 75 76 return (result); 77 } 78 79 80 /* 81 * Find the number of arcs in the node of the requested prop_name. If storage 82 * is given in arcp, store the first arcsize number of node indexes. 83 */ 84 static int 85 md_find_node_arcs(md_impl_t *mdp, mde_cookie_t node, 86 mde_str_cookie_t prop_name, int tag_type, mde_cookie_t *arcp, 87 size_t arcsize) 88 { 89 int result; 90 md_element_t *mdep; 91 int idx; 92 93 /* Get the private node information from session data */ 94 idx = (int)node; 95 mdep = &(mdp->mdep[idx]); 96 97 /* Make sure the cookie is in fact a node */ 98 if (MDE_TAG(mdep) != MDET_NODE) { 99 return (-1); 100 } 101 102 /* 103 * Walk the elements in the node and find all the arcs of the 104 * requested type, and store them in an array. 105 */ 106 result = 0; 107 for (idx++, mdep++; MDE_TAG(mdep) != MDET_NODE_END; idx++, mdep++) { 108 if ((MDE_TAG(mdep) == tag_type) && 109 (MDE_NAME(mdep) == prop_name)) { 110 if (arcp != NULL && result < arcsize) { 111 arcp[result] = 112 (mde_cookie_t)MDE_PROP_INDEX(mdep); 113 } 114 115 /* Increment the count of arcs found */ 116 result++; 117 } 118 } 119 120 /* Return the total count of arcs in the node */ 121 return (result); 122 } 123