text: // Copyright (c) 2012-2017, The CryptoNote developers, The Bytecoin developers
  //
  // This file is part of Bytecoin.
  //
  // Bytecoin 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 3 of the License, or
  // (at your option) any later version.
  //
  // Bytecoin 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 Bytecoin.  If not, see <http://www.gnu.org/licenses/>.
  
  #pragma once
  
  #include <string>
  
  namespace Tools
  {
    class PasswordContainer
    {
    public:
      static const size_t max_password_size = 1024;
  
      PasswordContainer();
      PasswordContainer(std::string&& password);
      PasswordContainer(PasswordContainer&& rhs);
      ~PasswordContainer();
  
      void clear();
      bool empty() const { return m_empty; }
      const std::string& password() const { return m_password; }
      void password(std::string&& val) { m_password = std::move(val); m_empty = false; }
      bool read_password();
  
    private:
      bool read_from_file();
      bool read_from_tty();
  
    private:
      bool m_empty;
      std::string m_password;
    };
  }
  