text: // % copyleft %
  // 
  // All rights reserved.
  // 
  // Redistribution and use in source and binary forms, with or without modification, are
  // permitted provided that the following conditions are met:
  // 
  // 1. Redistributions of source code must retain the above copyright notice, this list of
  //    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
  // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  // 
  // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
  
  #pragma once
  
  #include <boost/archive/binary_iarchive.hpp>
  #include <boost/archive/portable_binary_oarchive.hpp>
  #include <boost/archive/portable_binary_iarchive.hpp>
  #include <boost/filesystem/operations.hpp>
  
  
  namespace tools
  {
    template<class t_object>
    bool serialize_obj_to_file(t_object& obj, const std::string& file_path)
    {
      TRY_ENTRY();
  #if defined(_MSC_VER)
      // Need to know HANDLE of file to call FlushFileBuffers
      HANDLE data_file_handle = ::CreateFile(file_path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
      if (INVALID_HANDLE_VALUE == data_file_handle)
        return false;
  
      int data_file_descriptor = _open_osfhandle((intptr_t)data_file_handle, 0);
      if (-1 == data_file_descriptor)
      {
        ::CloseHandle(data_file_handle);
        return false;
      }
  
      const std::unique_ptr<FILE, tools::close_file> data_file_file{_fdopen(data_file_descriptor, "wb")};
      if (nullptr == data_file_file)
      {
        // Call CloseHandle is not necessary
        _close(data_file_descriptor);
        return false;
      }
  
      // HACK: undocumented constructor, this code may not compile
      std::ofstream data_file(data_file_file.get());
      if (data_file.fail())
      {
        // Call CloseHandle and _close are not necessary
        return false;
      }
  #else
      std::ofstream data_file;
      data_file.open(file_path , std::ios_base::binary | std::ios_base::out| std::ios::trunc);
      if (data_file.fail())
        return false;
  #endif
  
      boost::archive::portable_binary_oarchive a(data_file);
      a << obj;
      if (data_file.fail())
        return false;
  
      data_file.flush();
  #if defined(_MSC_VER)
      // To make sure the file is fully stored on disk
      ::FlushFileBuffers(data_file_handle);
  #endif
  
      return true;
      CATCH_ENTRY_L0("serialize_obj_to_file", false);
    }
  
    template<class t_object>
    bool unserialize_obj_from_file(t_object& obj, const std::string& file_path)
    {
      TRY_ENTRY();
  
      std::ifstream data_file;  
      data_file.open( file_path, std::ios_base::binary | std::ios_base::in);
      if(data_file.fail())
        return false;
      try
      {
        // first try reading in portable mode
        boost::archive::portable_binary_iarchive a(data_file);
        a >> obj;
      }
      catch(...)
      {
        // if failed, try reading in unportable mode
        boost::filesystem::copy_file(file_path, file_path + ".unportable", boost::filesystem::copy_option::overwrite_if_exists);
        data_file.close();
        data_file.open( file_path, std::ios_base::binary | std::ios_base::in);
        if(data_file.fail())
          return false;
        boost::archive::binary_iarchive a(data_file);
        a >> obj;
      }
      return !data_file.fail();
      CATCH_ENTRY_L0("unserialize_obj_from_file", false);
    }
  }
  