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 (c) 1999 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <mdb/mdb_addrvec.h>
30#include <mdb/mdb_debug.h>
31#include <mdb/mdb_modapi.h>
32
33#include <strings.h>
34
35#define	AD_INIT	16	/* initial size of addrvec array */
36#define	AD_GROW	2	/* array growth multiplier */
37
38void
39mdb_addrvec_create(mdb_addrvec_t *adp)
40{
41	bzero(adp, sizeof (mdb_addrvec_t));
42}
43
44void
45mdb_addrvec_destroy(mdb_addrvec_t *adp)
46{
47	mdb_free(adp->ad_data, sizeof (uintptr_t) * adp->ad_size);
48	bzero(adp, sizeof (mdb_addrvec_t));
49}
50
51void
52mdb_addrvec_unshift(mdb_addrvec_t *adp, uintptr_t value)
53{
54	if (adp->ad_nelems >= adp->ad_size) {
55		size_t size = adp->ad_size ? adp->ad_size * AD_GROW : AD_INIT;
56		void *data = mdb_alloc(sizeof (uintptr_t) * size, UM_SLEEP);
57
58		bcopy(adp->ad_data, data, sizeof (uintptr_t) * adp->ad_size);
59		mdb_free(adp->ad_data, sizeof (uintptr_t) * adp->ad_size);
60
61		adp->ad_data = data;
62		adp->ad_size = size;
63	}
64
65	adp->ad_data[adp->ad_nelems++] = value;
66}
67
68uintptr_t
69mdb_addrvec_shift(mdb_addrvec_t *adp)
70{
71	if (adp->ad_ndx < adp->ad_nelems)
72		return (adp->ad_data[adp->ad_ndx++]);
73
74	return ((uintptr_t)-1L);
75}
76
77size_t
78mdb_addrvec_length(mdb_addrvec_t *adp)
79{
80	if (adp != NULL) {
81		ASSERT(adp->ad_nelems >= adp->ad_ndx);
82		return (adp->ad_nelems - adp->ad_ndx);
83	}
84
85	return (0); /* convenience for callers */
86}
87