/* <!-- copyright */
/*
 * aria2 - a simple utility for downloading files faster
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
/* copyright --> */
#include "Piece.h"

Piece Piece::nullPiece;

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

Piece& Piece::operator=(const Piece& piece) {
  if(this != &piece) {
    index = piece.index;
    length = piece.length;
    if(bitfield != NULL) {
      delete bitfield;
    }
    if(piece.bitfield == NULL) {
      bitfield = NULL;
    } else {
      bitfield = new BitfieldMan(*piece.bitfield);
    }
  }
  return *this;
}

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

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

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;
}

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