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/***************************************************************************
* Copyright (C) 2005 by *
* Joris Guisson <joris.guisson@gmail.com> *
* Ivan Vasic <ivasic@gmail.com> *
* *
* 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. *
***************************************************************************/
#ifndef BTTORRENTFILE_H
#define BTTORRENTFILE_H
#include <tqstring.h>
#include <util/constants.h>
#include <interfaces/torrentfileinterface.h>
namespace bt
{
class BitSet;
/**
* @author Joris Guisson
*
* File in a multi file torrent. Keeps track of the path of the file,
* it's size, offset into the cache and between which chunks it lies.
*/
class TorrentFile : public kt::TorrentFileInterface
{
Q_OBJECT
Uint32 index;
Uint64 cache_offset;
Uint64 first_chunk_off;
Uint64 last_chunk_size;
Priority priority;
Priority old_priority;
bool missing;
enum FileType
{
UNKNOWN,
MULTIMEDIA,
NORMAL
};
mutable FileType filetype;
public:
/**
* Default constructor. Creates a null TorrentFile.
*/
TorrentFile();
/**
* Constructor.
* @param index Index number of the file
* @param path Path of the file
* @param off Offset into the torrent
* (i.e. how many bytes were all the previous files in the torrent combined)
* @param size Size of the file
* @param chunk_size Size of each chunk
*/
TorrentFile(Uint32 index,const TQString & path,Uint64 off,Uint64 size,Uint64 chunk_size);
/**
* Copy constructor.
* @param tf The TorrentFile to copy
*/
TorrentFile(const TorrentFile & tf);
virtual ~TorrentFile();
/// Get the index of the file
Uint32 getIndex() const {return index;}
/// Get the offset into the torrent
Uint64 getCacheOffset() const {return cache_offset;}
/// Get the offset at which the file starts in the first chunk
Uint64 getFirstChunkOffset() const {return first_chunk_off;}
/// Get how many bytes the files takes up of the last chunk
Uint64 getLastChunkSize() const {return last_chunk_size;}
/// Check if this file doesn't have to be downloaded
bool doNotDownload() const
{if(priority == EXCLUDED) return true; else return false;}
/// Set wether we have to not download this file
void setDoNotDownload(bool dnd);
/// Checks if this file is multimedial
bool isMultimedia() const;
/// Gets the priority of the file
Priority getPriority() const {return priority;}
/// Sets the priority of the file
void setPriority(Priority newpriority = NORMAL_PRIORITY);
/// Get the previous priority value
Priority getOldPriority() const {return old_priority;}
/// emits signal.
void emitDownloadStatusChanged();
void setEmitDownloadStatusChanged(bool show) { m_emitDlStatusChanged = show; }
/**
* Assignment operator
* @param tf The file to copy
* @return *this
*/
TorrentFile & operator = (const TorrentFile & tf);
/// See if the file is missing
bool isMissing() const {return missing;}
/// Set the file to be missing or not
void setMissing(bool m) {missing = m;}
/**
* Calculate the offset of a chunk in the file
* @param cindex Index of chunk
* @param chunk_size Size of each chunk
*/
Uint64 fileOffset(Uint32 cindex,Uint64 chunk_size) const;
static TorrentFile null;
/**
* Update the number of downloaded chunks for this file.
* @param bs The current bitset of all chunks
*/
void updateNumDownloadedChunks(const BitSet & bs);
signals:
/**
* Signal emitted when the Priority variable changes.
* @param tf The TorrentFile which emitted the signal
* @param newpriority THe new priority of the file
* @param oldpriority Previous priority
*/
void downloadPriorityChanged(TorrentFile* tf,Priority newpriority,Priority oldpriority);
};
}
#endif
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