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      1 /*	$NetBSD: parse_rx.h,v 1.1.1.1 2008/12/22 00:18:37 haad Exp $	*/
      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 
     21 enum {
     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 
     38 struct 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 
     50 struct rx_node *rx_parse_str(struct dm_pool *mem, const char *str);
     51 struct rx_node *rx_parse_tok(struct dm_pool *mem,
     52 			     const char *begin, const char *end);
     53 
     54 #endif
     55