//
// socket_option.hpp
// ~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2006 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//

#ifndef BOOST_ASIO_DETAIL_SOCKET_OPTION_HPP
#define BOOST_ASIO_DETAIL_SOCKET_OPTION_HPP

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include <boost/asio/detail/push_options.hpp>

#include <boost/asio/detail/push_options.hpp>
#include <cstddef>
#include <boost/config.hpp>
#include <boost/asio/detail/pop_options.hpp>

#include <boost/asio/detail/socket_types.hpp>

namespace boost {
namespace asio {
namespace detail {
namespace socket_option {

// Helper template for implementing boolean-based options.
template <int Level, int Name>
class boolean
{
public:
  // Default constructor.
  boolean()
    : value_(0)
  {
  }

  // Construct with a specific option value.
  boolean(bool value)
    : value_(value ? 1 : 0)
  {
  }

  // Set the value of the boolean.
  void set(bool value)
  {
    value_ = value ? 1 : 0;
  }

  // Get the current value of the boolean.
  bool get() const
  {
    return value_;
  }

  // Get the level of the socket option.
  template <typename Protocol>
  int level(const Protocol&) const
  {
    return Level;
  }

  // Get the name of the socket option.
  template <typename Protocol>
  int name(const Protocol&) const
  {
    return Name;
  }

  // Get the address of the boolean data.
  template <typename Protocol>
  int* data(const Protocol&)
  {
    return &value_;
  }

  // Get the address of the boolean data.
  template <typename Protocol>
  const int* data(const Protocol&) const
  {
    return &value_;
  }

  // Get the size of the boolean data.
  template <typename Protocol>
  std::size_t size(const Protocol&) const
  {
    return sizeof(value_);
  }

private:
  int value_;
};

// Helper template for implementing integer options.
template <int Level, int Name>
class integer
{
public:
  // Default constructor.
  integer()
    : value_(0)
  {
  }

  // Construct with a specific option value.
  integer(int value)
    : value_(value)
  {
  }

  // Set the value of the int option.
  void set(int value)
  {
    value_ = value;
  }

  // Get the current value of the int option.
  int get() const
  {
    return value_;
  }

  // Get the level of the socket option.
  template <typename Protocol>
  int level(const Protocol&) const
  {
    return Level;
  }

  // Get the name of the socket option.
  template <typename Protocol>
  int name(const Protocol&) const
  {
    return Name;
  }

  // Get the address of the int data.
  template <typename Protocol>
  int* data(const Protocol&)
  {
    return &value_;
  }

  // Get the address of the int data.
  template <typename Protocol>
  const int* data(const Protocol&) const
  {
    return &value_;
  }

  // Get the size of the int data.
  template <typename Protocol>
  std::size_t size(const Protocol&) const
  {
    return sizeof(value_);
  }

private:
  int value_;
};

// Helper template for implementing unsigned integer options.
template <int Level, int Name>
class unsigned_integer
{
public:
  // Default constructor.
  unsigned_integer()
    : value_(0)
  {
  }

  // Construct with a specific option value.
  unsigned_integer(unsigned int value)
    : value_(value)
  {
  }

  // Set the value of the int option.
  void set(unsigned int value)
  {
    value_ = value;
  }

  // Get the current value of the int option.
  unsigned int get() const
  {
    return value_;
  }

  // Get the level of the socket option.
  template <typename Protocol>
  int level(const Protocol&) const
  {
    return Level;
  }

  // Get the name of the socket option.
  template <typename Protocol>
  int name(const Protocol&) const
  {
    return Name;
  }

  // Get the address of the int data.
  template <typename Protocol>
  unsigned int* data(const Protocol&)
  {
    return &value_;
  }

  // Get the address of the int data.
  template <typename Protocol>
  const unsigned int* data(const Protocol&) const
  {
    return &value_;
  }

  // Get the size of the int data.
  template <typename Protocol>
  std::size_t size(const Protocol&) const
  {
    return sizeof(value_);
  }

private:
  unsigned int value_;
};

// Helper template for implementing linger options.
template <int Level, int Name>
class linger
{
public:
  // Default constructor.
  linger()
  {
    value_.l_onoff = 0;
    value_.l_linger = 0;
  }

  // Construct with specific option values.
  linger(bool value, unsigned short timeout)
  {
    value_.l_onoff = value ? 1 : 0;
    value_.l_linger = timeout;
  }

  // Set the value for whether linger is enabled.
  void enabled(bool value)
  {
    value_.l_onoff = value ? 1 : 0;
  }

  // Get the value for whether linger is enabled.
  bool enabled() const
  {
    return value_.l_onoff != 0;
  }

  // Set the value for the linger timeout.
  void timeout(unsigned short value)
  {
    value_.l_linger = value;
  }

  // Get the value for the linger timeout.
  unsigned short timeout() const
  {
    return value_.l_linger;
  }

  // Get the level of the socket option.
  template <typename Protocol>
  int level(const Protocol&) const
  {
    return Level;
  }

  // Get the name of the socket option.
  template <typename Protocol>
  int name(const Protocol&) const
  {
    return Name;
  }

  // Get the address of the linger data.
  template <typename Protocol>
  ::linger* data(const Protocol&)
  {
    return &value_;
  }

  // Get the address of the linger data.
  template <typename Protocol>
  const ::linger* data(const Protocol&) const
  {
    return &value_;
  }

  // Get the size of the linger data.
  template <typename Protocol>
  std::size_t size(const Protocol&) const
  {
    return sizeof(value_);
  }

private:
  ::linger value_;
};

} // namespace socket_option
} // namespace detail
} // namespace asio
} // namespace boost

#include <boost/asio/detail/pop_options.hpp>

#endif // BOOST_ASIO_DETAIL_SOCKET_OPTION_HPP