Chris@16: // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
Chris@16: // (C) Copyright 2003-2007 Jonathan Turkanis
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
Chris@16: 
Chris@16: // See http://www.boost.org/libs/iostreams for documentation.
Chris@16: 
Chris@16: #ifndef BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED
Chris@16: #define BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED
Chris@16: 
Chris@16: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
Chris@16: # pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <memory>            // allocator.
Chris@16: #include <boost/config.hpp>  // BOOST_DEDUCED_TYPENAME.
Chris@16: #include <boost/iostreams/detail/char_traits.hpp>
Chris@16: #include <boost/iostreams/detail/config/overload_resolution.hpp>
Chris@16: #include <boost/iostreams/detail/forward.hpp>
Chris@16: #include <boost/iostreams/detail/ios.hpp>  // failure, streamsize.
Chris@16: #include <boost/iostreams/detail/streambuf/direct_streambuf.hpp>
Chris@16: #include <boost/iostreams/detail/streambuf/indirect_streambuf.hpp>
Chris@16: #include <boost/iostreams/traits.hpp>
Chris@16: #include <boost/static_assert.hpp>
Chris@16: #include <boost/throw_exception.hpp>
Chris@16: #include <boost/type_traits/is_convertible.hpp>
Chris@16: 
Chris@16: // Must come last.
Chris@16: #include <boost/iostreams/detail/config/disable_warnings.hpp>  // MSVC.
Chris@16: 
Chris@16: namespace boost { namespace iostreams { namespace detail {
Chris@16: 
Chris@16: template<typename T, typename Tr, typename Alloc, typename Mode>
Chris@16: struct stream_buffer_traits {
Chris@16:     typedef typename
Chris@16:             mpl::if_<
Chris@16:                 is_convertible<
Chris@16:                     BOOST_DEDUCED_TYPENAME category_of<T>::type,
Chris@16:                     direct_tag
Chris@16:                 >,
Chris@16:                 direct_streambuf<T, Tr>,
Chris@16:                 indirect_streambuf<T, Tr, Alloc, Mode>
Chris@16:             >::type type;
Chris@16: };
Chris@16: 
Chris@16: } } } // End namespaces detail, iostreams, boost
Chris@16: 
Chris@16: #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION
Chris@16: # include <boost/iostreams/detail/broken_overload_resolution/stream_buffer.hpp>
Chris@16: #else
Chris@16: 
Chris@16: namespace boost { namespace iostreams {
Chris@16: 
Chris@16: template< typename T,
Chris@16:           typename Tr =
Chris@16:               BOOST_IOSTREAMS_CHAR_TRAITS(
Chris@16:                   BOOST_DEDUCED_TYPENAME char_type_of<T>::type
Chris@16:               ),
Chris@16:           typename Alloc =
Chris@16:               std::allocator<
Chris@16:                   BOOST_DEDUCED_TYPENAME char_type_of<T>::type
Chris@16:               >,
Chris@16:           typename Mode = BOOST_DEDUCED_TYPENAME mode_of<T>::type >
Chris@16: class stream_buffer
Chris@16:     : public detail::stream_buffer_traits<T, Tr, Alloc, Mode>::type
Chris@16: {
Chris@16: private:
Chris@16:     BOOST_STATIC_ASSERT((
Chris@16:         is_convertible<
Chris@16:             BOOST_DEDUCED_TYPENAME iostreams::category_of<T>::type, Mode
Chris@16:         >::value
Chris@16:     ));
Chris@16:     typedef typename
Chris@16:             detail::stream_buffer_traits<
Chris@16:                 T, Tr, Alloc, Mode
Chris@16:             >::type                           base_type;
Chris@16: public:
Chris@16:     typedef typename char_type_of<T>::type    char_type;
Chris@16:     struct category 
Chris@16:         : Mode,
Chris@16:           closable_tag,
Chris@16:           streambuf_tag
Chris@16:         { };
Chris@16:     BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr)
Chris@16: public:
Chris@16:     stream_buffer() { }
Chris@16:     ~stream_buffer()
Chris@16:     { 
Chris@16:         try { 
Chris@16:             if (this->is_open() && this->auto_close()) 
Chris@16:                 this->close(); 
Chris@16:         } catch (...) { } 
Chris@16:     }
Chris@16:     BOOST_IOSTREAMS_FORWARD( stream_buffer, open_impl, T,
Chris@16:                              BOOST_IOSTREAMS_PUSH_PARAMS,
Chris@16:                              BOOST_IOSTREAMS_PUSH_ARGS )
Chris@16:     T& operator*() { return *this->component(); }
Chris@16:     T* operator->() { return this->component(); }
Chris@16: private:
Chris@16:     void open_impl(const T& t BOOST_IOSTREAMS_PUSH_PARAMS())
Chris@16:         {   // Used for forwarding.
Chris@16:             if (this->is_open())
Chris@16:                 boost::throw_exception(
Chris@16:                     BOOST_IOSTREAMS_FAILURE("already open")
Chris@16:                 );
Chris@16:             base_type::open(t BOOST_IOSTREAMS_PUSH_ARGS());
Chris@16:         }
Chris@16: };
Chris@16: 
Chris@16: } } // End namespaces iostreams, boost.
Chris@16: 
Chris@16: #endif // #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION
Chris@16: 
Chris@16: #include <boost/iostreams/detail/config/enable_warnings.hpp>  // MSVC.
Chris@16: 
Chris@16: #endif // #ifndef BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED