/***********************************************************************
	gutenfetch - query and fetch electronic texts from project gutenberg
    Copyright (C) 2001, 2002, 2003 Russell Francis 

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
	USA

	Last updated on $Date: 2004/03/21 05:14:23 $ by $Author: johntabularasa $.
***********************************************************************/
#ifndef LIBGUTENFETCH_FILTER_H
#define LIBGUTENFETCH_FILTER_H

#include "stddefs.h"
#include "libgutenfetch_error.h"
#include "list.h"
#ifdef HAVE_SYS_TYPES_H
#	include <sys/types.h>
#endif
#if ((HAVE_REGEX_H==1) && (USE_C_REGEX==1))
#	include <regex.h>
#else
#	if ((HAVE_GNUREGEX_H) && (USE_LIBGNUREGEX==1))
#		include <gnuregex.h>
#	else
#		include "gnuregex.h"
#	endif
#endif

/*
 * These can be passed as the first argument to
 * gutenfetch_ifilter_match to use these already created
 * predefined filters.
 */
enum {
	IFILTER_GUTINDEX_OLD,
	IFILTER_GUTINDEX_NEW,
	IFILTER_AUTHOR,
	IFILTER_OLD_TITLE,
	IFILTER_NEW_TITLE,
	IFILTER_LS_LR_DETAIL_DIRECTORY,
	IFILTER_LS_LR_DETAIL_ENTRY,
	IFILTER_LS_R_DETAIL_DIRECTORY,
	IFILTER_LS_R_DETAIL_ENTRY,
	IFILTER_FILENAME_BASE_EXT,
	NUM_OF_IFILTER
};

typedef struct {
	int sub;		/* should we return the values which match? */
	regex_t *regex;	/* The compiled regular expression. */
} gutenfetch_filter_t;

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

	gutenfetch_error_t		gutenfetch_filter_init(void);

	gutenfetch_error_t 		gutenfetch_filter_shutdown(void);
	
	gutenfetch_filter_t* 	gutenfetch_filter_create(
								const char *, int);

	list_t*					gutenfetch_ifilter_match(
								int,
								const char *);

	list_t*					gutenfetch_filter_match(
								gutenfetch_filter_t *,
								const char *);

	void					gutenfetch_filter_destroy(
								gutenfetch_filter_t *);
#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* FILTER_H */