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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@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. *
***************************************************************************/
#include <klocale.h>
#include <util/log.h>
#include <util/file.h>
#include <util/error.h>
#include <util/array.h>
#include <torrent/globals.h>
#include <torrent/torrent.h>
#include <torrent/chunkmanager.h>
#include "cachechecker.h"
using namespace bt;
namespace ktdebug
{
CacheChecker::CacheChecker(bt::Torrent & tor) : tor(tor)
{}
CacheChecker::~CacheChecker()
{}
void CacheChecker::loadIndex(const QString & index_file)
{
this->index_file = index_file;
File fptr;
if (!fptr.open(index_file,"rb"))
throw Error(i18n("Cannot open index file %1 : %2").arg(index_file).arg(fptr.errorString()));
if (fptr.seek(File::END,0) != 0)
{
fptr.seek(File::BEGIN,0);
while (!fptr.eof())
{
NewChunkHeader hdr;
fptr.read(&hdr,sizeof(NewChunkHeader));
downloaded_chunks.insert(hdr.index);
}
}
}
struct ChunkHeader
{
unsigned int index; // the Chunks index
unsigned int deprecated; // offset in cache file
};
void CacheChecker::fixIndex()
{
if (failed_chunks.size() == 0 && extra_chunks.size() == 0)
return;
File fptr;
if (!fptr.open(index_file,"wb"))
throw Error(i18n("Cannot open index file %1 : %2").arg(index_file).arg(fptr.errorString()));
std::set<bt::Uint32>::iterator i;
// first remove failed chunks from downloaded
if (failed_chunks.size() > 0)
{
i = failed_chunks.begin();
while (i != failed_chunks.end())
{
downloaded_chunks.erase(*i);
i++;
}
}
// add extra chunks to download
if (extra_chunks.size() > 0)
{
i = extra_chunks.begin();
while (i != extra_chunks.end())
{
downloaded_chunks.insert(*i);
i++;
}
}
// write remaining chunks
i = downloaded_chunks.begin();
while (i != downloaded_chunks.end())
{
ChunkHeader ch = {*i,0};
fptr.write(&ch,sizeof(ChunkHeader));
i++;
}
}
}
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