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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2009 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_PIECE_STAT_MAN_H_
#define _D_PIECE_STAT_MAN_H_
#include "common.h"
#include <vector>
#include "SharedHandle.h"
namespace aria2 {
class PieceStat {
private:
size_t order_;
size_t index_;
size_t count_;
public:
PieceStat(size_t index);
bool operator<(const PieceStat& pieceStat) const
{
if(count_ == pieceStat.count_) {
return order_ < pieceStat.order_;
} else {
return count_ < pieceStat.count_;
}
}
void addCount();
void subCount();
size_t getOrder() const
{
return order_;
}
void setOrder(size_t order)
{
order_ = order;
}
size_t getIndex() const
{
return index_;
}
size_t getCount() const
{
return count_;
}
};
class PieceStatMan {
private:
std::vector<SharedHandle<PieceStat> > pieceStats_;
std::vector<size_t> sortedPieceStatIndexes_;
public:
PieceStatMan(size_t pieceNum, bool randomShuffle);
void addPieceStats(size_t index);
void addPieceStats(const unsigned char* bitfield,
size_t bitfieldLength);
void subtractPieceStats(const unsigned char* bitfield,
size_t bitfieldLength);
void updatePieceStats(const unsigned char* newBitfield,
size_t newBitfieldLength,
const unsigned char* oldBitfield);
// Returns piece index in rarest first order.
const std::vector<size_t>& getRarerPieceIndexes() const
{
return sortedPieceStatIndexes_;
}
const std::vector<SharedHandle<PieceStat> >& getPieceStats() const
{
return pieceStats_;
}
};
} // namespace aria2
#endif // _D_PIECE_STAT_MAN_H_
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