text: // Copyright (c) 2014-2022, The Monero Project
  //
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  //    conditions and the following disclaimer.
  //
  // 2. Redistributions in binary form must reproduce the above copyright notice, this list
  //    of conditions and the following disclaimer in the documentation and/or other
  //    materials provided with the distribution.
  //
  // 3. Neither the name of the copyright holder nor the names of its contributors may be
  //    used to endorse or promote products derived from this software without specific
  //    prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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  // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #pragma once
  
  #include <boost/iostreams/stream_buffer.hpp>
  #include <boost/iostreams/stream.hpp>
  #include <boost/iostreams/device/back_inserter.hpp>
  #include <boost/iostreams/filtering_streambuf.hpp>
  #include <boost/filesystem/path.hpp>
  #include <boost/filesystem/operations.hpp>
  
  #include "cryptonote_basic/cryptonote_basic.h"
  #include "cryptonote_core/blockchain.h"
  
  #include <algorithm>
  #include <cstdio>
  #include <fstream>
  #include <atomic>
  
  #include "common/command_line.h"
  #include "version.h"
  
  #include "blockchain_utilities.h"
  
  
  using namespace cryptonote;
  
  
  class BootstrapFile
  {
  public:
  
    uint64_t count_bytes(std::ifstream& import_file, uint64_t blocks, uint64_t& h, bool& quit);
    uint64_t count_blocks(const std::string& dir_path, std::streampos& start_pos, uint64_t& seek_height, uint64_t& block_first);
    uint64_t count_blocks(const std::string& dir_path);
    uint64_t seek_to_first_chunk(std::ifstream& import_file, uint8_t &major_version, uint8_t &minor_version, uint64_t &block_first, uint64_t &block_last);
  
    bool store_blockchain_raw(cryptonote::Blockchain* cs, cryptonote::tx_memory_pool* txp,
        boost::filesystem::path& output_file, uint64_t start_block=0, uint64_t stop_block=0);
  
  protected:
  
    Blockchain* m_blockchain_storage;
  
    tx_memory_pool* m_tx_pool;
    typedef std::vector<char> buffer_type;
    std::ofstream * m_raw_data_file;
    buffer_type m_buffer;
    boost::iostreams::stream<boost::iostreams::back_insert_device<buffer_type>>* m_output_stream;
  
    // open export file for write
    bool open_writer(const boost::filesystem::path& file_path, uint64_t start_block, uint64_t stop_block);
    bool initialize_file(uint64_t start_block, uint64_t stop_block);
    bool close();
    void write_block(block& block);
    void flush_chunk();
  
  private:
  
    uint64_t m_height;
    uint64_t m_cur_height; // tracks current height during export
    uint32_t m_max_chunk;
  };
  