boost/iostreams/detail/adapter/device_adapter.hpp

   1 /*
   2  * Defines the class template boost::iostreams::detail::device_adapter,
   3  * a convenience base class for device adapters.
   4  *
   5  * File:        boost/iostreams/detail/adapter/filter_adapter.hpp
   6  * Date:        Mon Nov 26 14:35:48 MST 2007
   7  *
   8  * Copyright:   2007-2008 CodeRage, LLC
   9  * Author:      Jonathan Turkanis
  10  * Contact:     turkanis at coderage dot com
  11  *
  12  * Distributed under the Boost Software License, Version 1.0.(See accompanying
  13  * file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
  14  *
  15  * See http://www.boost.org/libs/iostreams for documentation.
  16  */
  17
  18 #ifndef BOOST_IOSTREAMS_DETAIL_DEVICE_ADAPTER_HPP_INCLUDED
  19 #define BOOST_IOSTREAMS_DETAIL_DEVICE_ADAPTER_HPP_INCLUDED
  20
  21 #include <boost/iostreams/categories.hpp>
  22 #include <boost/iostreams/detail/call_traits.hpp>
  23 #include <boost/iostreams/detail/ios.hpp>
  24 #include <boost/iostreams/operations.hpp>
  25 #include <boost/iostreams/traits.hpp>
  26 #include <boost/static_assert.hpp>
  27
  28 namespace boost { namespace iostreams { namespace detail {
  29
  30 template<typename T>
  31 class device_adapter {
  32 private:
  33     typedef typename detail::value_type<T>::type value_type;
  34     typedef typename detail::param_type<T>::type param_type;
  35 public:
  36     explicit device_adapter(param_type t) : t_(t) { }
  37     T& component() { return t_; }
  38
  39     void close()
  40     {
  41         detail::close_all(t_);
  42     }
  43
  44     void close(BOOST_IOS::openmode which)
  45     {
  46         iostreams::close(t_, which);
  47     }
  48
  49     bool flush()
  50     {
  51         return iostreams::flush(t_);
  52     }
  53
  54     template<typename Locale> // Avoid dependency on <locale>
  55     void imbue(const Locale& loc) { iostreams::imbue(t_, loc); }
  56
  57     std::streamsize optimal_buffer_size() const
  58     { return iostreams::optimal_buffer_size(t_); }
  59 public:
  60     value_type t_;
  61 };
  62
  63 //----------------------------------------------------------------------------//
  64
  65 } } } // End namespaces detail, iostreams, boost.
  66
  67 #endif // #ifndef BOOST_IOSTREAMS_DETAIL_DEVICE_ADAPTER_HPP_INCLUDED