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/** @file msetcmp.h
* @brief MSetItem comparison functions and functors.
*/
/* Copyright (C) 2006,2007,2011 Olly Betts
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#ifndef XAPIAN_INCLUDED_MSETCMP_H
#define XAPIAN_INCLUDED_MSETCMP_H
#include "api/omenquireinternal.h"
// typedef for MSetItem comparison function.
typedef bool (* mset_cmp)(const Xapian::Internal::MSetItem &,
const Xapian::Internal::MSetItem &);
/// Select the appropriate msetcmp function.
mset_cmp get_msetcmp_function(Xapian::Enquire::Internal::sort_setting sort_by, bool sort_forward, bool sort_value_forward);
/// MSetItem comparison functor.
class MSetCmp {
mset_cmp fn;
public:
explicit MSetCmp(mset_cmp fn_) : fn(fn_) { }
/// Return true if MSetItem a should be ranked above MSetItem b.
bool operator()(const Xapian::Internal::MSetItem &a,
const Xapian::Internal::MSetItem &b) const {
return fn(a, b);
}
};
#endif // XAPIAN_INCLUDED_MSETCMP_H
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