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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@gamned.org
*/
/**
* \file basic_socketbuf.hpp
* \brief Socket buffer to be used with std::basic_socket_stream, for easy
* socket reading and writing.
* \author Julien Jorge
*/
#ifndef __CLAW_BASIC_SOCKETBUF_HPP__
#define __CLAW_BASIC_SOCKETBUF_HPP__
#include <streambuf>
#include <string>
#include <claw/basic_socket.hpp>
namespace claw
{
namespace net
{
/**
* \brief Socket buffer to be used with std::basic_stream, for easy socket
* reading and writing.
* \author Julien Jorge
*/
template< typename CharT, typename Traits >
class basic_socketbuf : private basic_socket,
public std::basic_streambuf<CharT, Traits>
{
public:
/** \brief The type of the characters in the stream. */
typedef CharT char_type;
/** \brief The traits carry some informations about the char_type. */
typedef Traits traits_type;
/** \brief The type used to represent integers. */
typedef typename traits_type::int_type int_type;
/** \brief The type used to represent a position in the stream. */
typedef typename traits_type::pos_type pos_type;
/** \brief The type used to represent a delta in the positions. */
typedef typename traits_type::off_type off_type;
/** \brief The type of this implementation. */
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:
/** \brief Number of second to wait before considering nothing will come
in the socket. Negative values mean infinity. */
int m_read_limit;
/** \brief Input buffer. */
char_type* m_input_buffer;
/** \brief Size of the input buffer. */
size_t m_input_buffer_size;
/** \brief Output buffer. */
char_type* m_output_buffer;
/** \brief Size of the output buffer. */
size_t m_output_buffer_size;
/** \brief Default size for the buffers. */
static const size_t s_buffer_size;
}; // class basic_socketbuf
} // namespace net
} // namespace claw
#include <claw/impl/basic_socketbuf.tpp>
#endif // __CLAW_BASIC_SOCKETBUF_HPP__
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