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/* $Id$ */
/*
 * Copyright (c) 2005 Dimitri Sokolyuk <demon@dim13.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#ifndef _META_H_
#define _META_H_

#if 0
#include <netinet/in.h>
#endif

#ifndef SHA1LEN
#define SHA1LEN 20
#endif

#define btsetbit(a, i)	((a)[(i) / NBBY] |= 1 << (NBBY - ((i) % NBBY) - 1))
#define btclrbit(a, i)	((a)[(i) / NBBY] &= ~(1 << (NBBY - ((i) % NBBY) - 1)))
#define btisset(a, i)	((a)[(i) / NBBY] & (1 << (NBBY - ((i) % NBBY) - 1)))
#define btisclr(a, i)	(((a)[(i) / NBBY] & (1 << (NBBY - ((i) % NBBY) - 1))) == 0)

struct btannounce {
	SIMPLEQ_ENTRY(btannounce) link;	/* isn't used jet, preparation for an ann-list */
#if 0	/* obsolete */
	struct	sockaddr_in sin;
#endif
	char	*host;
	int	port;
	char	*path;
};

SIMPLEQ_HEAD(btalist, btannounce);

struct btfile {
	SIMPLEQ_ENTRY(btfile) link;
	off_t	length;
	char	*path;
};

SIMPLEQ_HEAD(btflist, btfile);

struct btmeta {
	char	*fname;

	int	nann;			/* number of tracker */
	struct	btalist btalist;	/* SIMPLEQ_HEAD */

	struct	btannounce *announce;	/* announce url */
	char	*name;			/* name of file or directory */
	off_t	plength;		/* length of one piece */
	int	npieces;		/* number of pieces */
	u_char	(*pieces)[SHA1LEN];	/* pieces SHA1 check-sum */
	u_char	infohash[SHA1LEN];	/* needed by peer */
	off_t	size;			/* size overall */
	int	nfiles;			/* num of files */
	struct	btflist flist;		/* SIMPLEQ_HEAD */

	/* aux */
	char	*comment;
	char	*by;			/* publisher */
	time_t	date;			/* published */

	/* should that all be there? */
	int	bitlen;
	char	*bitfield;		/* needed by peer (bitfield) */
	int	good;			/* good pieces */

	off_t	left;			/* needed by tracker */
#if 0
	struct	btmeta *next;		/* XXX next torrent, isn't used yet */
#endif
};

__BEGIN_DECLS
struct	btmeta *btreadmeta(char *);
void	btfreemeta(struct btmeta *);
__END_DECLS

#endif /* not _META_H_ */