1/*	$NetBSD: dwarf_cu.c,v 1.2 2010/02/22 11:01:29 darran Exp $	*/
2
3/*-
4 * Copyright (c) 2007 John Birrell (jb@freebsd.org)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: src/lib/libdwarf/dwarf_cu.c,v 1.1.4.1 2009/08/03 08:13:06 kensmith Exp $
29 */
30
31#if HAVE_NBTOOL_CONFIG_H
32#include "nbtool_config.h"
33#endif
34
35#include "_libdwarf.h"
36
37int
38dwarf_next_cu_header(Dwarf_Debug dbg, Dwarf_Unsigned *cu_header_length,
39    Dwarf_Half *cu_version, Dwarf_Unsigned *cu_abbrev_offset,
40    Dwarf_Half *cu_pointer_size, Dwarf_Unsigned *cu_next_offset, Dwarf_Error *error)
41{
42	Dwarf_CU next;
43
44	if (error == NULL)
45		return DWARF_E_ERROR;
46
47	if (dbg == NULL || cu_header_length == NULL || cu_version == NULL ||
48	    cu_abbrev_offset == NULL || cu_pointer_size == NULL ||
49	    cu_next_offset == NULL) {
50		DWARF_SET_ERROR(error, DWARF_E_ARGUMENT);
51		return DWARF_E_ERROR;
52	}
53
54	if (dbg->dbg_cu_current == NULL)
55		dbg->dbg_cu_current = STAILQ_FIRST(&dbg->dbg_cu);
56	else if ((next = STAILQ_NEXT(dbg->dbg_cu_current, cu_next)) == NULL) {
57		DWARF_SET_ERROR(error, DWARF_E_NO_ENTRY);
58		return DWARF_E_NO_ENTRY;
59	} else
60		dbg->dbg_cu_current = next;
61
62	if (dbg->dbg_cu_current == NULL) {
63		DWARF_SET_ERROR(error, DWARF_E_NO_ENTRY);
64		return DWARF_E_NO_ENTRY;
65	}
66
67	*cu_header_length	= dbg->dbg_cu_current->cu_header_length;
68	*cu_version 		= dbg->dbg_cu_current->cu_version;
69	*cu_abbrev_offset	= dbg->dbg_cu_current->cu_abbrev_offset;
70	*cu_pointer_size	= dbg->dbg_cu_current->cu_pointer_size;
71	*cu_next_offset		= dbg->dbg_cu_current->cu_next_offset;
72
73	return DWARF_E_NONE;
74}
75