1/*-
2 * Copyright (c) 2010 Joseph Koshy
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
27#include "_libdwarf.h"
28
29ELFTC_VCSID("$Id: dwarf_seterror.c 2075 2011-10-27 03:47:28Z jkoshy $");
30
31#define	_SET_FIELD(R, F, V)					\
32	do {							\
33		(R) = (F);					\
34		(F) = (V);					\
35	} while (0)
36
37#define	SET_FIELD(D, R, F)					\
38	do {							\
39		if (D)						\
40			_SET_FIELD(R, (D)->dbg_##F, F);		\
41		else						\
42			_SET_FIELD(R, _libdwarf.F, F);		\
43	} while (0)
44
45Dwarf_Handler
46dwarf_seterrhand(Dwarf_Debug dbg, Dwarf_Handler errhand)
47{
48	Dwarf_Handler oldhandler;
49
50	SET_FIELD(dbg, oldhandler, errhand);
51
52	return (oldhandler);
53}
54
55Dwarf_Ptr
56dwarf_seterrarg(Dwarf_Debug dbg, Dwarf_Ptr errarg)
57{
58	Dwarf_Ptr oldarg;
59
60	SET_FIELD(dbg, oldarg, errarg);
61
62	return (oldarg);
63}
64