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/* -*-mode: c; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-*/
/*
** Copyright (C) 2011 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
**
** 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 3, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**
*/
#ifndef __MU_THREADER_H__
#define __MU_THREADER_H__
#include <glib.h>
#include <mu-msg-iter.h>
G_BEGIN_DECLS
/**
* takes an iter and the total number of matches, and from this
* generates a hash-table with information about the thread structure
* of these matches.
*
* the algorithm to find this structure is based on JWZ's
* message-threading algorithm, as descrbed in:
* http://www.jwz.org/doc/threading.html
*
* the returned hashtable maps the Xapian docid of iter (msg) to a ptr
* to a MuMsgIterThreadInfo structure (see mu-msg-iter.h)
*
* @param iter an iter; note this function will mu_msgi_iter_reset this iterator
* @param matches the number of matches in the set *
* @param sortfield the field to sort results by, or
* MU_MSG_FIELD_ID_NONE if no sorting should be performed
* @param revert if TRUE, if revert the sorting order
*
* @return a hashtable; free with g_hash_table_destroy when done with it
*/
GHashTable *mu_threader_calculate (MuMsgIter *iter, size_t matches,
MuMsgFieldId sortfield, gboolean revert);
G_END_DECLS
#endif /*__MU_THREADER_H__*/
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