mirror of https://github.com/aria2/aria2
99 lines
3.2 KiB
C++
99 lines
3.2 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2012 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#ifndef D_VALUE_BASE_DISK_WRITER_H
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#define D_VALUE_BASE_DISK_WRITER_H
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#include "DiskWriter.h"
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#include "ValueBaseStructParserStateMachine.h"
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namespace aria2 {
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// DiskWriter backed with ValueBaseParser. The written bytes are
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// consumed by ValueBaseParser. It is only capable of sequential write
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// so offset argument in write() will be ignored. It also does not
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// offer read().
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template <class ValueBaseParser> class ValueBaseDiskWriter : public DiskWriter {
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public:
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ValueBaseDiskWriter() : parser_(&psm_) {}
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virtual ~ValueBaseDiskWriter() {}
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virtual void initAndOpenFile(int64_t totalLength = 0) CXX11_OVERRIDE
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{
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parser_.reset();
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}
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virtual void openFile(int64_t totalLength = 0) CXX11_OVERRIDE
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{
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initAndOpenFile(totalLength);
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}
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virtual void closeFile() CXX11_OVERRIDE {}
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virtual void openExistingFile(int64_t totalLength = 0) CXX11_OVERRIDE
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{
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initAndOpenFile(totalLength);
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}
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virtual int64_t size() CXX11_OVERRIDE { return 0; }
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virtual void writeData(const unsigned char* data, size_t len,
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int64_t offset) CXX11_OVERRIDE
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{
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// Return value is ignored here but handled in finalize()
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parser_.parseUpdate(reinterpret_cast<const char*>(data), len);
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}
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virtual ssize_t readData(unsigned char* data, size_t len,
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int64_t offset) CXX11_OVERRIDE
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{
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return 0;
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}
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int finalize() { return parser_.parseFinal(0, 0); }
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std::unique_ptr<ValueBase> getResult() { return psm_.getResult(); }
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void reset() { parser_.reset(); }
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private:
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ValueBaseStructParserStateMachine psm_;
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ValueBaseParser parser_;
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};
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} // namespace aria2
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#endif // D_VALUE_BASE_DISK_WRITER_H
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