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 <stdlib.h>
30#include <string.h>
31#include "_libdwarf.h"
32
33int
34dwarf_attr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Attribute *atp, Dwarf_Error *err)
35{
36	Dwarf_Attribute at;
37	Dwarf_Abbrev	a;
38	int ret = DWARF_E_NONE;
39
40	if (err == NULL)
41		return DWARF_E_ERROR;
42
43	if (die == NULL || atp == NULL || (a = die->die_a) == NULL) {
44		DWARF_SET_ERROR(err, DWARF_E_ARGUMENT);
45		return DWARF_E_ARGUMENT;
46	}
47
48	STAILQ_FOREACH(at, &a->a_attrib, at_next)
49		if (at->at_attrib == attr)
50			break;
51
52	*atp = at;
53
54	if (at == NULL) {
55		DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY);
56		ret = DWARF_E_NO_ENTRY;
57	}
58
59	return ret;
60}
61
62int
63dwarf_attr_add(Dwarf_Abbrev a, uint64_t attr, uint64_t form, Dwarf_Attribute *atp, Dwarf_Error *error)
64{
65	Dwarf_Attribute at;
66	int ret = DWARF_E_NONE;
67
68	if (error == NULL)
69		return DWARF_E_ERROR;
70
71	if (a == NULL) {
72		DWARF_SET_ERROR(error, DWARF_E_ARGUMENT);
73		return DWARF_E_ARGUMENT;
74	}
75
76	if ((at = malloc(sizeof(struct _Dwarf_Attribute))) == NULL) {
77		DWARF_SET_ERROR(error, DWARF_E_MEMORY);
78		return DWARF_E_MEMORY;
79	}
80
81	/* Initialise the attribute structure. */
82	at->at_attrib	= attr;
83	at->at_form	= form;
84
85	/* Add the attribute to the list in the abbrev. */
86	STAILQ_INSERT_TAIL(&a->a_attrib, at, at_next);
87
88	if (atp != NULL)
89		*atp = at;
90
91	return ret;
92}
93