/*
 * This code contains changes by
 *      Gunnar Ritter, Freiburg i. Br., Germany, 2002. All rights reserved.
 *
 * Conditions 1, 2, and 4 and the no-warranty notice below apply
 * to these changes.
 *
 *
 * Copyright (c) 1980, 1993
 * 	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 * 	This product includes software developed by the University of
 * 	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *
 * Copyright(C) Caldera International Inc. 2001-2002. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   Redistributions of source code and documentation must retain the
 *    above copyright notice, this list of conditions and the following
 *    disclaimer.
 *   Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *   All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed or owned by Caldera
 *      International, Inc.
 *   Neither the name of Caldera International, Inc. nor the names of
 *    other contributors may be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
 * INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE
 * LIABLE FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *	from ex_re.h	7.3 (Berkeley) 5/31/85
 *
 *	@(#)ex_re.h	1.15 (gritter) 2/3/02
 */

/*
 * Regular expression definitions.
 * The regular expressions in ex are similar to those in ed,
 * with the addition of the word boundaries from Toronto ed
 * and allowing character classes to have [a-b] as in the shell.
 * The numbers for the nodes below are spaced further apart then
 * necessary because I at one time partially put in + and | (one or
 * more and alternation.)
 */
struct	regexp {
	char	Expbuf[ESIZE + 2];
	bool	Circfl;
#ifdef	POSIX_2
	int	Low;
	int	Siz;
#endif
	short	Nbra;
};

/*
 * There are three regular expressions here, the previous (in re),
 * the previous substitute (in subre) and the previous scanning (in scanre).
 * It would be possible to get rid of "re" by making it a stack parameter
 * to the appropriate routines.
 */
var struct	regexp re;		/* Last re */
var struct	regexp scanre;		/* Last scanning re */
var struct	regexp subre;		/* Last substitute re */

/*
 * Defining circfl and expbuf like this saves us from having to change
 * old code in the ex_re.c stuff.
 */
#define	expbuf	re.Expbuf
#define	circfl	re.Circfl
#define	nbra	re.Nbra
#ifdef	POSIX_2
#define	low	re.Low
#define	siz	re.Siz
#endif

var	char	*loc1;		/* Where re began to match (in linebuf) */
var	char	*loc2;		/* First char after re match (") */

/*
 * Since the phototypesetter v7-epsilon
 * C compiler doesn't have structure assignment...
 */
struct regexp *savere __P((struct regexp *));
struct regexp *resre __P((struct regexp *));

/*
 * Definitions for substitute
 */
var char	*braslist[NBRA];	/* Starts of \(\)'ed text in lhs */
var char	*braelist[NBRA];	/* Ends... */
var char	rhsbuf[RHSSIZE];	/* Rhs of last substitute */
#ifdef	BIT8
var char	rhsquo[RHSSIZE];	/* Quote indicator for rhsbuf */
#endif

/*
 * Definitions of codes for the compiled re's.
 * The re algorithm is described in a paper
 * by K. Thompson in the CACM about 10 years ago
 * and is the same as in ed.
 */
#define	STAR	1
#ifdef	POSIX_2
#define	RNGE	0100
#endif

#define	CBRA	1
#define	CDOT	4
#define	CCL	8
#define	NCCL	12
#define	CDOL	16
#define	CEOFC	17
#define	CKET	18
#define	CCHR	20
#define	CBRC	24
#define	CLET	25
#ifdef	POSIX_2
#define	CBACK	36
#endif
