1/*	$NetBSD$	*/
2
3/*
4 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
5 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
6 *
7 * This file is part of the device-mapper userspace tools.
8 *
9 * This copyrighted material is made available to anyone wishing to use,
10 * modify, copy, or redistribute it subject to the terms and conditions
11 * of the GNU Lesser General Public License v.2.1.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this program; if not, write to the Free Software Foundation,
15 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
16 */
17
18#ifndef _DM_PARSE_REGEX_H
19#define _DM_PARSE_REGEX_H
20
21enum {
22	CAT,
23	STAR,
24	PLUS,
25	OR,
26	QUEST,
27	CHARSET
28};
29
30/*
31 * We're never going to be running the regex on non-printable
32 * chars, so we can use a couple of these chars to represent the
33 * start and end of a string.
34 */
35#define HAT_CHAR 0x2
36#define DOLLAR_CHAR 0x3
37
38struct rx_node {
39	int type;
40	dm_bitset_t charset;
41	struct rx_node *left, *right;
42
43	/* used to build the dfa for the toker */
44	int nullable, final;
45	dm_bitset_t firstpos;
46	dm_bitset_t lastpos;
47	dm_bitset_t followpos;
48};
49
50struct rx_node *rx_parse_str(struct dm_pool *mem, const char *str);
51struct rx_node *rx_parse_tok(struct dm_pool *mem,
52			     const char *begin, const char *end);
53
54#endif
55