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ton/tddb/td/db/binlog/BinlogReaderHelper.h
2019-09-07 14:33:36 +04:00

47 lines
1.5 KiB
C++

/*
This file is part of TON Blockchain Library.
TON Blockchain Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
TON Blockchain Library 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
Copyright 2017-2019 Telegram Systems LLP
*/
#pragma once
#include "td/utils/Status.h"
#include "td/utils/Slice.h"
namespace td {
class BinlogReaderInterface;
// Usually we have data available in chunks and we can't control chunk's sizes
// And some events will be in multiple chunks.
// We suggest that all events are small, chunks are big and only small
// portion of events will lie on chunk's border.
// This helper will store this rare events locally and will feed them
// to BinlogReaderInterface as single memory chunk each.
class BinlogReaderHelper {
public:
td::Status parse(BinlogReaderInterface& reader, td::Slice data);
size_t unparsed_size() const;
private:
alignas(16) std::array<char, 1024> buf_;
size_t prefix_size_{0};
size_t expected_prefix_size_{0};
};
} // namespace td