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Style: kill register and indent properly.
Let indx match netbsd flavor, to simplify diffs.
Show how many quotes were not closed.
Increase stack slightly, now that we're no longer bound by argspace.

/*	$OpenBSD: extern.h,v 1.10 1999/09/14 08:35:16 espie Exp $	*/
/*	$NetBSD: extern.h,v 1.3 1996/01/13 23:25:24 pk Exp $	*/

/*-
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ozan Yigit at York University.
 *
 * 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.
 *
 *	@(#)extern.h	8.1 (Berkeley) 6/6/93
 */

char	*xalloc __P((unsigned long));
int	expr __P((char *));
ndptr	addent __P((char *));
void	chrsave __P((int));
void	dochc __P((char *[], int));
void	dochq __P((char *[], int));
void	dodefine __P((char *, char *));
void	dodefn __P((char *));
void	dodiv __P((int));
void	dodump __P((char *[], int));
void	doifelse __P((char *[], int));
int	doincl __P((char *));
int	dopaste __P((char *));
void	dopushdef __P((char *, char *));
void	dosub __P((char *[], int));
void	doundiv __P((char *[], int));
void	eval __P((char *[], int, int));
void	expand __P((char *[], int));
void	getdiv __P((int));
char	*xstrdup __P((const char *));
int	hash __P((char *));
ptrdiff_t	indx __P((const char *, const char *));
void	killdiv __P((void));
ndptr	lookup __P((char *));
void	map __P((char *, char *, char *, char *));
void	onintr __P((int));
void	pbnum __P((int));
void	pbstr __P((char *));
void	putback __P((int));
void	remhash __P((char *, int));
void	usage __P((void));
void initspaces __P((void));
char *compute_prevep __P((void));

extern ndptr hashtab[];		/* hash table for macros etc. */
extern stae mstack[];		/* stack of m4 machine */
extern FILE *active;		/* active output file pointer */
extern FILE *infile[];		/* input file stack (0=stdin) */
extern FILE *outfile[];		/* diversion array(0=bitbucket) */
extern int fp; 			/* m4 call frame pointer */
extern int ilevel;		/* input file stack pointer */
extern int oindex;		/* diversion index. */
extern int sp;			/* current m4 stack pointer */
extern pbent *bp;		/* first available character */
extern pbent *buf;		/* push-back buffer */
extern pbent *bufbase;		/* buffer base for this ilevel */
extern pbent *bbase[];		/* buffer base per ilevel */
extern char ecommt[];		/* end character for comment */
extern char *ep;		/* first free char in strspace */
extern char lquote[];		/* left quote character (`) */
extern char *m4wraps;		/* m4wrap string default. */
extern char *null;		/* as it says.. just a null. */
extern char rquote[];		/* right quote character (') */
extern char scommt[];		/* start character for comment */

/* gnum4.c */
extern FILE *fopen_trypath __P((const char *filename));
extern void addtoincludepath __P((const char *dirname));