files from last release. ex-050325

libuxre/regdfa.h

@@ -0,0 +1,75 @@
+/*
+ * Changes by Gunnar Ritter, Freiburg i. Br., Germany, November 2002.
+ *
+ * Sccsid @(#)regdfa.h	1.3 (gritter) 9/22/03
+ */
+/*  UNIX(R) Regular Expresssion Library
+ *
+ *  Note: Code is released under the GNU LGPL
+ *
+ *  Copyright (C) 2001 Caldera International, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to:
+ *        Free Software Foundation, Inc.
+ *        59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*	#include "synonyms.h"	*/
+
+/*
+* Deterministic Finite Automata.
+*/
+
+#ifndef	LIBUXRE_REGDFA_H
+#define	LIBUXRE_REGDFA_H
+
+#include <re.h>
+
+typedef struct
+{
+	Bracket	*bkt;	/* extra info for ROP_BKT */
+	size_t	nset;	/* number of items in the follow set */
+	size_t	seti;	/* index into the follow set strip */
+	w_type	op;	/* the leaf match operation */
+} Posn;
+
+#define CACHESZ	32	/* max. states to remember (must fit in uchar) */
+#define NCHAR	(1 << CHAR_BIT)
+
+struct re_dfa_ /*Dfa*/
+{
+	unsigned char	*posset;	/* signatures built here */
+	size_t		*posfoll;	/* follow strip for posn[] */
+	size_t		*sigfoll;	/* follow strip for sigi[] */
+	size_t		*cursig;	/* current state's signature */
+	Posn		*posn;		/* important positions */
+	size_t		nposn;		/* length of posn,cursig,posset */
+	size_t		used;		/* used portion of follow strip */
+	size_t		avail;		/* unused part of follow strip */
+	size_t		nset;		/* # items nonzero in posset[] */
+	size_t		nsig[CACHESZ];	/* number of items in signature */
+	size_t		sigi[CACHESZ];	/* index into sigfoll[] */
+	unsigned char	acc[CACHESZ];	/* nonzero for accepting states */
+	unsigned char	leftmost;	/* leftmost() start, not BOL */
+	unsigned char	leftbol;	/* leftmost() start, w/BOL */
+	unsigned char	anybol;		/* any match start, w/BOL */
+	unsigned char	nfix;		/* number of invariant states */
+	unsigned char	top;		/* next state index available */
+	unsigned char	flags;		/* interesting flags */
+	unsigned char	trans[CACHESZ][NCHAR];	/* goto table */
+};
+
+extern int	 regtrans(Dfa *, int, w_type, int);
+
+#endif	/* !LIBUXRE_REGDFA_H */