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/* <!-- 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 "IteratableChecksumValidator.h"
#include <cstdlib>
#include "util.h"
#include "message.h"
#include "PieceStorage.h"
#include "messageDigest.h"
#include "LogFactory.h"
#include "Logger.h"
#include "DiskAdaptor.h"
#include "FileEntry.h"
#include "BitfieldMan.h"
#include "DownloadContext.h"
namespace aria2 {
#define BUFSIZE (256*1024)
#define ALIGNMENT 512
IteratableChecksumValidator::IteratableChecksumValidator
(const SharedHandle<DownloadContext>& dctx,
const PieceStorageHandle& pieceStorage):
_dctx(dctx),
_pieceStorage(pieceStorage),
_currentOffset(0),
_logger(LogFactory::getInstance()),
_buffer(0) {}
IteratableChecksumValidator::~IteratableChecksumValidator()
{
#ifdef HAVE_POSIX_MEMALIGN
free(_buffer);
#else // !HAVE_POSIX_MEMALIGN
delete [] _buffer;
#endif // !HAVE_POSIX_MEMALIGN
}
void IteratableChecksumValidator::validateChunk()
{
if(!finished()) {
size_t length = _pieceStorage->getDiskAdaptor()->readData(_buffer,
BUFSIZE,
_currentOffset);
_ctx->digestUpdate(_buffer, length);
_currentOffset += length;
if(finished()) {
std::string actualChecksum = util::toHex(_ctx->digestFinal());
if(_dctx->getChecksum() == actualChecksum) {
_pieceStorage->markAllPiecesDone();
} else {
BitfieldMan bitfield(_dctx->getPieceLength(), _dctx->getTotalLength());
_pieceStorage->setBitfield(bitfield.getBitfield(), bitfield.getBitfieldLength());
}
}
}
}
bool IteratableChecksumValidator::finished() const
{
if((uint64_t)_currentOffset >= _dctx->getTotalLength()) {
_pieceStorage->getDiskAdaptor()->disableDirectIO();
return true;
} else {
return false;
}
}
uint64_t IteratableChecksumValidator::getTotalLength() const
{
return _dctx->getTotalLength();
}
void IteratableChecksumValidator::init()
{
#ifdef HAVE_POSIX_MEMALIGN
free(_buffer);
_buffer = reinterpret_cast<unsigned char*>
(util::allocateAlignedMemory(ALIGNMENT, BUFSIZE));
#else // !HAVE_POSIX_MEMALIGN
delete [] _buffer;
_buffer = new unsigned char[BUFSIZE];
#endif // !HAVE_POSIX_MEMALIGN
_pieceStorage->getDiskAdaptor()->enableDirectIO();
_currentOffset = 0;
_ctx.reset(new MessageDigestContext());
_ctx->trySetAlgo(_dctx->getChecksumHashAlgo());
_ctx->digestInit();
}
} // namespace aria2
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