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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2012 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 --> */
#ifndef D_VALUE_BASE_DISK_WRITER_H
#define D_VALUE_BASE_DISK_WRITER_H
#include "DiskWriter.h"
#include "ValueBaseStructParserStateMachine.h"
namespace aria2 {
// DiskWriter backed with ValueBaseParser. The written bytes are
// consumed by ValueBaseParser. It is only capable of sequential write
// so offset argument in write() will be ignored. It also does not
// offer read().
template <class ValueBaseParser> class ValueBaseDiskWriter : public DiskWriter {
public:
ValueBaseDiskWriter() : parser_(&psm_) {}
virtual ~ValueBaseDiskWriter() = default;
virtual void initAndOpenFile(int64_t totalLength = 0) CXX11_OVERRIDE
{
parser_.reset();
}
virtual void openFile(int64_t totalLength = 0) CXX11_OVERRIDE
{
initAndOpenFile(totalLength);
}
virtual void closeFile() CXX11_OVERRIDE {}
virtual void openExistingFile(int64_t totalLength = 0) CXX11_OVERRIDE
{
initAndOpenFile(totalLength);
}
virtual int64_t size() CXX11_OVERRIDE { return 0; }
virtual void writeData(const unsigned char* data, size_t len,
int64_t offset) CXX11_OVERRIDE
{
// Return value is ignored here but handled in finalize()
parser_.parseUpdate(reinterpret_cast<const char*>(data), len);
}
virtual ssize_t readData(unsigned char* data, size_t len,
int64_t offset) CXX11_OVERRIDE
{
return 0;
}
int finalize() { return parser_.parseFinal(0, 0); }
std::unique_ptr<ValueBase> getResult() { return psm_.getResult(); }
void reset() { parser_.reset(); }
private:
ValueBaseStructParserStateMachine psm_;
ValueBaseParser parser_;
};
} // namespace aria2
#endif // D_VALUE_BASE_DISK_WRITER_H
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