Class pstream_common

evaluation/TMscore.cpp:472–529

  /// Class template for common base class.
  template <typename CharT, typename Traits = std::char_traits<CharT> >
    class pstream_common
    : virtual public std::basic_ios<CharT, Traits>
    , virtual public pstreams
    {
    protected:
      typedef basic_pstreambuf<CharT, Traits>       streambuf_type;

      typedef pstreams::pmode                       pmode;
      typedef pstreams::argv_type                   argv_type;

      /// Default constructor.
      pstream_common();

      /// Constructor that initialises the stream by starting a process.
      pstream_common(const std::string& cmd, pmode mode);

      /// Constructor that initialises the stream by starting a process.
      pstream_common(const std::string& file, const argv_type& argv, pmode mode);

      /// Pure virtual destructor.
      virtual
      ~pstream_common() = 0;

      /// Start a process.
      void
      do_open(const std::string& cmd, pmode mode);

      /// Start a process.
      void
      do_open(const std::string& file, const argv_type& argv, pmode mode);

    public:
      /// Close the pipe.
      void
      close();

      /// Report whether the stream's buffer has been initialised.
      bool
      is_open() const;

      /// Return the command used to initialise the stream.
      const std::string&
      command() const;

      /// Return a pointer to the stream buffer.
      streambuf_type*
      rdbuf() const;

#if REDI_EVISCERATE_PSTREAMS
      /// Obtain FILE pointers for each of the process' standard streams.
      std::size_t
      fopen(FILE*& in, FILE*& out, FILE*& err);
#endif

    protected:
      std::string       command_; ///< The command used to start the process.
      streambuf_type    buf_;     ///< The stream buffer.
    };