sl@0: // (C) Copyright Jonathan Turkanis 2003.
sl@0: // Distributed under the Boost Software License, Version 1.0. (See accompanying
sl@0: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
sl@0: 
sl@0: // See http://www.boost.org/libs/iostreams for documentation.
sl@0: 
sl@0: #ifndef BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED
sl@0: #define BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED
sl@0: 
sl@0: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
sl@0: # pragma once
sl@0: #endif
sl@0: 
sl@0: #include <memory>            // allocator.
sl@0: #include <boost/config.hpp>  // BOOST_DEDUCED_TYPENAME.
sl@0: #include <boost/iostreams/detail/char_traits.hpp>
sl@0: #include <boost/iostreams/detail/config/overload_resolution.hpp>
sl@0: #include <boost/iostreams/detail/forward.hpp>
sl@0: #include <boost/iostreams/detail/ios.hpp>  // failure, streamsize.
sl@0: #include <boost/iostreams/detail/streambuf/direct_streambuf.hpp>
sl@0: #include <boost/iostreams/detail/streambuf/indirect_streambuf.hpp>
sl@0: #include <boost/iostreams/traits.hpp>
sl@0: #include <boost/static_assert.hpp>
sl@0: #include <boost/type_traits/is_convertible.hpp>
sl@0: 
sl@0: // Must come last.
sl@0: #include <boost/iostreams/detail/config/disable_warnings.hpp>  // MSVC.
sl@0: 
sl@0: namespace boost { namespace iostreams { namespace detail {
sl@0: 
sl@0: template<typename T, typename Tr, typename Alloc, typename Mode>
sl@0: struct stream_buffer_traits {
sl@0:     typedef typename
sl@0:             mpl::if_<
sl@0:                 is_convertible<
sl@0:                     BOOST_DEDUCED_TYPENAME category_of<T>::type,
sl@0:                     direct_tag
sl@0:                 >,
sl@0:                 direct_streambuf<T, Tr>,
sl@0:                 indirect_streambuf<T, Tr, Alloc, Mode>
sl@0:             >::type type;
sl@0: };
sl@0: 
sl@0: } } } // End namespaces detail, iostreams, boost
sl@0: 
sl@0: #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION
sl@0: # include <boost/iostreams/detail/broken_overload_resolution/stream_buffer.hpp>
sl@0: #else
sl@0: 
sl@0: namespace boost { namespace iostreams {
sl@0: 
sl@0: template< typename T,
sl@0:           typename Tr =
sl@0:               BOOST_IOSTREAMS_CHAR_TRAITS(
sl@0:                   BOOST_DEDUCED_TYPENAME char_type_of<T>::type
sl@0:               ),
sl@0:           typename Alloc =
sl@0:               std::allocator<
sl@0:                   BOOST_DEDUCED_TYPENAME char_type_of<T>::type
sl@0:               >,
sl@0:           typename Mode = BOOST_DEDUCED_TYPENAME mode_of<T>::type >
sl@0: class stream_buffer
sl@0:     : public detail::stream_buffer_traits<T, Tr, Alloc, Mode>::type
sl@0: {
sl@0: private:
sl@0:     BOOST_STATIC_ASSERT((
sl@0:         is_convertible<
sl@0:             BOOST_DEDUCED_TYPENAME iostreams::category_of<T>::type, Mode
sl@0:         >::value
sl@0:     ));
sl@0:     typedef typename
sl@0:             detail::stream_buffer_traits<
sl@0:                 T, Tr, Alloc, Mode
sl@0:             >::type                           base_type;
sl@0:     typedef T                                 policy_type;
sl@0: public:
sl@0:     typedef typename char_type_of<T>::type    char_type;
sl@0:     BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr)
sl@0: public:
sl@0:     stream_buffer() { }
sl@0:     ~stream_buffer()
sl@0:     { 
sl@0:         try { 
sl@0:             if (this->is_open() && this->auto_close()) 
sl@0:                 this->close(); 
sl@0:         } catch (std::exception&) { } 
sl@0:     }
sl@0:     BOOST_IOSTREAMS_FORWARD( stream_buffer, open_impl, T,
sl@0:                              BOOST_IOSTREAMS_PUSH_PARAMS,
sl@0:                              BOOST_IOSTREAMS_PUSH_ARGS )
sl@0:     T& operator*() { return *this->component(); }
sl@0:     T* operator->() { return this->component(); }
sl@0: private:
sl@0:     void open_impl(const T& t BOOST_IOSTREAMS_PUSH_PARAMS())
sl@0:         {   // Used for forwarding.
sl@0:             if (this->is_open())
sl@0:                 BOOST_IOSTREAMS_FAILURE("already open");
sl@0:             base_type::open(t BOOST_IOSTREAMS_PUSH_ARGS());
sl@0:         }
sl@0: };
sl@0: 
sl@0: } } // End namespaces iostreams, boost.
sl@0: 
sl@0: #endif // #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION
sl@0: 
sl@0: #include <boost/iostreams/detail/config/enable_warnings.hpp>  // MSVC.
sl@0: 
sl@0: #endif // #ifndef BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED