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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2010 Tatsuhiro Tsujikawa
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#ifndef D_TRIPLET_H
#define D_TRIPLET_H
#include <cstdlib>
#include <utility>
namespace aria2 {
template<typename T1, typename T2, typename T3>
struct Triplet {
typedef T1 first_type;
typedef T2 second_type;
typedef T3 third_type;
T1 first;
T2 second;
T3 third;
Triplet() {}
Triplet(const T1& t1, const T2& t2, const T3& t3):
first(t1), second(t2), third(t3) {}
template<typename U1, typename U2, typename U3>
Triplet(const Triplet<U1, U2, U3>& t):
first(t.first), second(t.second), third(t.third) {}
Triplet& operator=(const Triplet& tri)
{
if(this != &tri) {
first = tri.first;
second = tri.second;
third = tri.third;
}
return *this;
}
};
template<typename T1, typename T2, typename T3>
bool operator<(const Triplet<T1, T2, T3>& lhs, const Triplet<T1, T2, T3>& rhs)
{
return lhs.first < rhs.first ||
(!(rhs.first < lhs.first) && (lhs.second < rhs.second ||
(!(rhs.second < lhs.second) &&
lhs.third < rhs.third)));
}
template<typename T1, typename T2, typename T3>
Triplet<T1, T2, T3> makeTriplet(const T1& t1, const T2& t2, const T3& t3)
{
return Triplet<T1, T2, T3>(t1, t2, t3);
}
template<class Tuple, size_t N>
struct TupleNthType;
template<class Tuple>
struct TupleNthType<Tuple, 1> {
typedef typename Tuple::first_type type;
};
template<class Tuple>
struct TupleNthType<Tuple, 2> {
typedef typename Tuple::second_type type;
};
template<class Tuple>
struct TupleNthType<Tuple, 3> {
typedef typename Tuple::third_type type;
};
template<size_t N>
struct TupleGet;
template<>
struct TupleGet<1> {
template<class Tuple>
static typename TupleNthType<Tuple, 1>::type get(const Tuple& tri)
{
return tri.first;
}
};
template<>
struct TupleGet<2> {
template<class Tuple>
static typename TupleNthType<Tuple, 2>::type get(const Tuple& tri)
{
return tri.second;
}
};
template<>
struct TupleGet<3> {
template<class Tuple>
static typename TupleNthType<Tuple, 3>::type get(const Tuple& tri)
{
return tri.third;
}
};
template<size_t N1, size_t N2>
class Tuple2Pair {
public:
template<class Tuple>
std::pair<typename TupleNthType<Tuple, N1>::type,
typename TupleNthType<Tuple, N2>::type>
operator()(const Tuple& tri) const
{
return std::make_pair(TupleGet<N1>::get(tri), TupleGet<N2>::get(tri));
}
};
} // namespace aria2
#endif // D_TRIPLET_H
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