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