basic_socketbuf.hpp

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/*
  CLAW - a C++ Library Absolutely Wonderful
 
  CLAW is a free library without any particular aim but being useful to
  anyone.
 
  Copyright (C) 2005-2011 Julien Jorge
 
  This 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 2.1 of the License, or (at your option) any later version.
 
  This 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 this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
  contact: julien.jorge@stuff-o-matic.com
*/
#ifndef __CLAW_BASIC_SOCKETBUF_HPP__
#define __CLAW_BASIC_SOCKETBUF_HPP__
 
#include <claw/net/basic_socket.hpp>
 
#include <streambuf>
#include <string>
 
namespace claw
{
  namespace net
  {
    template <typename CharT, typename Traits>
    class basic_socketbuf
      : private basic_socket
      , public std::basic_streambuf<CharT, Traits>
    {
    public:
      typedef CharT char_type;

      typedef Traits traits_type;

      typedef typename traits_type::int_type int_type;

      typedef typename traits_type::pos_type pos_type;

      typedef typename traits_type::off_type off_type;

      typedef basic_socketbuf<char_type, traits_type> self_type;
 
    public:
      basic_socketbuf(int read_limit = -1);
      virtual ~basic_socketbuf();
 
      self_type* open(const std::string& addr, int port);
      self_type* open(socket_traits::descriptor d);
      self_type* close();
 
      bool is_open() const;
 
      void set_read_time_limit(int read_limit);
 
    protected:
      virtual int sync();
      virtual int_type underflow();
      virtual int_type overflow(int_type c = traits_type::eof());
 
    private:
      bool connect(const std::string& addr, int port);
 
      void create_buffers();
      void destroy_buffers();
 
      bool buffered() const;
 
    private:
      int m_read_limit;

      char_type* m_input_buffer;

      size_t m_input_buffer_size;

      char_type* m_output_buffer;

      size_t m_output_buffer_size;

      static const size_t s_buffer_size;
 
    }; // class basic_socketbuf
  }
}
 
#include <claw/net/basic_socketbuf.tpp>
 
#endif // __CLAW_BASIC_SOCKETBUF_HPP__