/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 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 --> */
#include "Piece.h"
#include "Util.h"
#include "BitfieldManFactory.h"

Piece::Piece():index(0), length(0), bitfield(0) {}

Piece::Piece(int index, int length):index(index), length(length) {
  bitfield =
    BitfieldManFactory::getFactoryInstance()->createBitfieldMan(BLOCK_LENGTH, length);
}

Piece::Piece(const Piece& piece) {
  index = piece.index;
  length = piece.length;
  if(piece.bitfield == 0) {
    bitfield = 0;
  } else {
    bitfield = new BitfieldMan(*piece.bitfield);
  }
}


void Piece::completeBlock(int blockIndex) {
  bitfield->setBit(blockIndex);
  bitfield->unsetUseBit(blockIndex);
}

void Piece::clearAllBlock() {
  bitfield->clearAllBit();
  bitfield->clearAllUseBit();
}

void Piece::setAllBlock() {
  bitfield->setAllBit();
}

bool Piece::pieceComplete() const {
  return bitfield->isAllBitSet();
}

void Piece::cancelBlock(int blockIndex) {
  bitfield->unsetUseBit(blockIndex);
}

int Piece::getMissingUnusedBlockIndex() const {
  int blockIndex = bitfield->getFirstMissingUnusedIndex();
  if(blockIndex == -1) {
    return blockIndex;
  }
  bitfield->setUseBit(blockIndex);
  return blockIndex;
}

int Piece::getMissingBlockIndex() const {
  int blockIndex = bitfield->getMissingIndex();
  if(blockIndex == -1) {
    return blockIndex;
  }
  bitfield->setUseBit(blockIndex);
  return blockIndex;
}

BlockIndexes Piece::getAllMissingBlockIndexes() const {
  return bitfield->getAllMissingIndexes();
}

string Piece::toString() const {
  return "piece: index="+Util::itos(index)+", length="+Util::itos(length);
}