#ifndef _REGEX_H_
#define	_REGEX_H_	/* never again */
/*
 * regular expressions
 *
 * Copyright (c) 1998, 1999 Henry Spencer.  All rights reserved.
 * 
 * Development of this software was funded, in part, by Cray Research Inc.,
 * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
 * Corporation, none of whom are responsible for the results.  The author
 * thanks all of them. 
 * 
 * Redistribution and use in source and binary forms -- with or without
 * modification -- are permitted for any purpose, provided that
 * redistributions in source form retain this entire copyright notice and
 * indicate the origin and nature of any modifications.
 *
 * I'd appreciate being given credit for this package in the documentation
 * of software which uses it, but that is not a requirement.
 * 
 * THIS SOFTWARE IS PROVIDED ``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
 * HENRY SPENCER 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.
 *
 * $Id: regex.h,v 1.23 2003/02/05 17:41:32 tgl Exp $
 */

/*
 * Add your own defines, if needed, here.
 */
#include "mb/pg_wchar.h"

/*
 * interface types etc.
 */

/*
 * regoff_t has to be large enough to hold either off_t or ssize_t,
 * and must be signed; it's only a guess that long is suitable.
 */
typedef long regoff_t;

/*
 * other interface types
 */

/* the biggie, a compiled RE (or rather, a front end to same) */
typedef struct {
	int re_magic;		/* magic number */
	size_t re_nsub;		/* number of subexpressions */
	long re_info;		/* information about RE */
#		define	REG_UBACKREF		000001
#		define	REG_ULOOKAHEAD		000002
#		define	REG_UBOUNDS		000004
#		define	REG_UBRACES		000010
#		define	REG_UBSALNUM		000020
#		define	REG_UPBOTCH		000040
#		define	REG_UBBS		000100
#		define	REG_UNONPOSIX		000200
#		define	REG_UUNSPEC		000400
#		define	REG_UUNPORT		001000
#		define	REG_ULOCALE		002000
#		define	REG_UEMPTYMATCH		004000
#		define	REG_UIMPOSSIBLE		010000
#		define	REG_USHORTEST		020000
	int re_csize;		/* sizeof(character) */
	char *re_endp;		/* backward compatibility kludge */
	/* the rest is opaque pointers to hidden innards */
	char *re_guts;		/* `char *' is more portable than `void *' */
	char *re_fns;
} regex_t;

/* result reporting (may acquire more fields later) */
typedef struct {
	regoff_t rm_so;		/* start of substring */
	regoff_t rm_eo;		/* end of substring */
} regmatch_t;

/* supplementary control and reporting */
typedef struct {
	regmatch_t rm_extend;	/* see REG_EXPECT */
} rm_detail_t;



/*
 * regex compilation flags
 */
#define	REG_BASIC	000000	/* BREs (convenience) */
#define	REG_EXTENDED	000001	/* EREs */
#define	REG_ADVF	000002	/* advanced features in EREs */
#define	REG_ADVANCED	000003	/* AREs (which are also EREs) */
#define	REG_QUOTE	000004	/* no special characters, none */
#define	REG_NOSPEC	REG_QUOTE	/* historical synonym */
#define	REG_ICASE	000010	/* ignore case */
#define	REG_NOSUB	000020	/* don't care about subexpressions */
#define	REG_EXPANDED	000040	/* expanded format, white space & comments */
#define	REG_NLSTOP	000100	/* \n doesn't match . or [^ ] */
#define	REG_NLANCH	000200	/* ^ matches after \n, $ before */
#define	REG_NEWLINE	000300	/* newlines are line terminators */
#define	REG_PEND	000400	/* ugh -- backward-compatibility hack */
#define	REG_EXPECT	001000	/* report details on partial/limited matches */
#define	REG_BOSONLY	002000	/* temporary kludge for BOS-only matches */
#define	REG_DUMP	004000	/* none of your business :-) */
#define	REG_FAKE	010000	/* none of your business :-) */
#define	REG_PROGRESS	020000	/* none of your business :-) */



/*
 * regex execution flags
 */
#define	REG_NOTBOL	0001	/* BOS is not BOL */
#define	REG_NOTEOL	0002	/* EOS is not EOL */
#define	REG_STARTEND	0004	/* backward compatibility kludge */
#define	REG_FTRACE	0010	/* none of your business */
#define	REG_MTRACE	0020	/* none of your business */
#define	REG_SMALL	0040	/* none of your business */


/*
 * error reporting
 * Be careful if modifying the list of error codes -- the table used by
 * regerror() is generated automatically from this file!
 */
#define	REG_OKAY	 0	/* no errors detected */
#define	REG_NOMATCH	 1	/* failed to match */
#define	REG_BADPAT	 2	/* invalid regexp */
#define	REG_ECOLLATE	 3	/* invalid collating element */
#define	REG_ECTYPE	 4	/* invalid character class */
#define	REG_EESCAPE	 5	/* invalid escape \ sequence */
#define	REG_ESUBREG	 6	/* invalid backreference number */
#define	REG_EBRACK	 7	/* brackets [] not balanced */
#define	REG_EPAREN	 8	/* parentheses () not balanced */
#define	REG_EBRACE	 9	/* braces {} not balanced */
#define	REG_BADBR	10	/* invalid repetition count(s) */
#define	REG_ERANGE	11	/* invalid character range */
#define	REG_ESPACE	12	/* out of memory */
#define	REG_BADRPT	13	/* quantifier operand invalid */
#define	REG_ASSERT	15	/* "can't happen" -- you found a bug */
#define	REG_INVARG	16	/* invalid argument to regex function */
#define	REG_MIXED	17	/* character widths of regex and string differ */
#define	REG_BADOPT	18	/* invalid embedded option */
/* two specials for debugging and testing */
#define	REG_ATOI	101	/* convert error-code name to number */
#define	REG_ITOA	102	/* convert error-code number to name */



/*
 * the prototypes for exported functions
 */
extern int pg_regcomp(regex_t *, const pg_wchar *, size_t, int);
extern int pg_regexec(regex_t *, const pg_wchar *, size_t, rm_detail_t *, size_t, regmatch_t [], int);
extern void pg_regfree(regex_t *);
extern size_t pg_regerror(int, const regex_t *, char *, size_t);

#endif /* _REGEX_H_ */
