/*-
 * Copyright (c) 1992 Henry Spencer.
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Henry Spencer of the University of Toronto.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)regex.h	8.2 (Berkeley) 01/03/94
 */

#ifndef _REGEX_H_
#define	_REGEX_H_

#include <sys/cdefs.h>

/* types */
typedef off_t regoff_t;

typedef struct {
	int re_magic;
	size_t re_nsub;		/* number of parenthesized subexpressions */
	__const char *re_endp;	/* end pointer for REG_PEND */
	struct re_guts *re_g;	/* none of your business :-) */
} regex_t;

typedef struct {
	regoff_t rm_so;		/* start of match */
	regoff_t rm_eo;		/* end of match */
} regmatch_t;

/* regcomp() flags */
#define	REG_BASIC	0000
#define	REG_EXTENDED	0001
#define	REG_ICASE	0002
#define	REG_NOSUB	0004
#define	REG_NEWLINE	0010
#define	REG_NOSPEC	0020
#define	REG_PEND	0040
#define	REG_DUMP	0200

/* regerror() flags */
#define	REG_NOMATCH	 1
#define	REG_BADPAT	 2
#define	REG_ECOLLATE	 3
#define	REG_ECTYPE	 4
#define	REG_EESCAPE	 5
#define	REG_ESUBREG	 6
#define	REG_EBRACK	 7
#define	REG_EPAREN	 8
#define	REG_EBRACE	 9
#define	REG_BADBR	10
#define	REG_ERANGE	11
#define	REG_ESPACE	12
#define	REG_BADRPT	13
#define	REG_EMPTY	14
#define	REG_ASSERT	15
#define	REG_INVARG	16
#define	REG_ATOI	255	/* convert name to number (!) */
#define	REG_ITOA	0400	/* convert number to name (!) */

/* regexec() flags */
#define	REG_NOTBOL	00001
#define	REG_NOTEOL	00002
#define	REG_STARTEND	00004
#define	REG_TRACE	00400	/* tracing of execution */
#define	REG_LARGE	01000	/* force large representation */
#define	REG_BACKR	02000	/* force use of backref code */

__BEGIN_DECLS
int	regcomp __P((regex_t *, const char *, int));
size_t	regerror __P((int, const regex_t *, char *, size_t));
int	regexec __P((const regex_t *,
	    const char *, size_t, regmatch_t [], int));
void	regfree __P((regex_t *));
__END_DECLS

#endif /* !_REGEX_H_ */