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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson & Maggioni Marcello *
* joris.guisson@gmail.com *
* marcello.maggioni@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 <kapplication.h>
#include <util/log.h>
#include <util/file.h>
#include <util/fileops.h>
#include <util/error.h>
#include <util/array.h>
#include <util/functions.h>
#include <torrent/dndfile.h>
#include <torrent/globals.h>
#include <torrent/torrent.h>
#include <torrent/torrentfile.h>
#include "multidatachecker.h"
namespace bt
{
MultiDataChecker::MultiDataChecker(): DataChecker(),buf(0)
{}
MultiDataChecker::~MultiDataChecker()
{
delete [] buf;
}
void MultiDataChecker::check(const TQString& path, const Torrent& tor,const TQString & dnddir)
{
Uint32 num_chunks = tor.getNumChunks();
// initialize the bitsets
downloaded = BitSet(num_chunks);
failed = BitSet(num_chunks);
cache = path;
if (!cache.endsWith(bt::DirSeparator()))
cache += bt::DirSeparator();
dnd_dir = dnddir;
if (!dnddir.endsWith(bt::DirSeparator()))
dnd_dir += bt::DirSeparator();
Uint64 chunk_size = tor.getChunkSize();
Uint32 cur_chunk = 0;
TimeStamp last_update_time = bt::GetCurrentTime();
buf = new Uint8[chunk_size];
for (cur_chunk = 0;cur_chunk < num_chunks;cur_chunk++)
{
Uint32 cs = (cur_chunk == num_chunks - 1) ? tor.getFileLength() % chunk_size : chunk_size;
if (cs == 0)
cs = chunk_size;
if (!loadChunk(cur_chunk,cs,tor))
{
downloaded.set(cur_chunk,false);
failed.set(cur_chunk,true);
continue;
}
bool ok = (SHA1Hash::generate(buf,cs) == tor.getHash(cur_chunk));
downloaded.set(cur_chunk,ok);
failed.set(cur_chunk,!ok);
if (listener)
{
listener->status(failed.numOnBits(),downloaded.numOnBits());
listener->progress(cur_chunk,num_chunks);
if (listener->needToStop())
return;
}
TimeStamp now = bt::GetCurrentTime();
if (now - last_update_time > 1000)
{
Out() << "Checked " << cur_chunk << " chunks" << endl;
// KApplication::kApplication()->processEvents();
last_update_time = now;
}
}
}
static Uint32 ReadFullChunk(Uint32 chunk,Uint32 cs,
const TorrentFile & tf,
const Torrent & tor,
Uint8* buf,
const TQString & cache)
{
File fptr;
if (!fptr.open(cache + tf.getPath(), "rb"))
{
Out() << TQString("Warning : Cannot open %1 : %2").tqarg(cache +
tf.getPath()).tqarg(fptr.errorString()) << endl;
return 0;
}
Uint64 off = tf.fileOffset(chunk,tor.getChunkSize());
fptr.seek(File::BEGIN,off);
return fptr.read(buf,cs);
}
bool MultiDataChecker::loadChunk(Uint32 ci,Uint32 cs,const Torrent & tor)
{
TQValueList<Uint32> tflist;
tor.calcChunkPos(ci,tflist);
// one file is simple
if (tflist.count() == 1)
{
const TorrentFile & f = tor.getFile(tflist.first());
if (!f.doNotDownload())
{
ReadFullChunk(ci,cs,f,tor,buf,cache);
return true;
}
return false;
}
Uint64 read = 0; // number of bytes read
for (Uint32 i = 0;i < tflist.count();i++)
{
const TorrentFile & f = tor.getFile(tflist[i]);
// first calculate offset into file
// only the first file can have an offset
// the following files will start at the beginning
Uint64 off = 0;
if (i == 0)
off = f.fileOffset(ci,tor.getChunkSize());
Uint32 to_read = 0;
// then the amount of data we can read from this file
if (i == 0)
to_read = f.getLastChunkSize();
else if (i == tflist.count() - 1)
to_read = cs - read;
else
to_read = f.getSize();
// read part of data
if (f.doNotDownload())
{
if (!dnd_dir.isNull() && bt::Exists(dnd_dir + f.getPath() + ".dnd"))
{
Uint32 ret = 0;
DNDFile dfd(dnd_dir + f.getPath() + ".dnd");
if (i == 0)
ret = dfd.readLastChunk(buf,read,cs);
else if (i == tflist.count() - 1)
ret = dfd.readFirstChunk(buf,read,cs);
else
ret = dfd.readFirstChunk(buf,read,cs);
if (ret > 0 && ret != to_read)
Out() << "Warning : MultiDataChecker::load ret != to_read (dnd)" << endl;
}
}
else
{
if (!bt::Exists(cache + f.getPath()) || bt::FileSize(cache + f.getPath()) < off)
return false;
File fptr;
if (!fptr.open(cache + f.getPath(), "rb"))
{
Out() << TQString("Warning : Cannot open %1 : %2").tqarg(cache +
f.getPath()).tqarg(fptr.errorString()) << endl;
return false;
}
else
{
fptr.seek(File::BEGIN,off);
if (fptr.read(buf+read,to_read) != to_read)
Out() << "Warning : MultiDataChecker::load ret != to_read" << endl;
}
}
read += to_read;
}
return true;
}
}
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