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_HPP_INCLUDED
Chris@16: #define BOOST_IOSTREAMS_STREAM_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 <boost/iostreams/constants.hpp>
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/iostream.hpp>  // standard streams.
Chris@16: #include <boost/iostreams/detail/select.hpp>
Chris@16: #include <boost/iostreams/stream_buffer.hpp>
Chris@16: #include <boost/mpl/and.hpp>
Chris@16: #include <boost/type_traits/is_convertible.hpp>
Chris@16: #include <boost/utility/base_from_member.hpp>
Chris@16: 
Chris@16: namespace boost { namespace iostreams { namespace detail {
Chris@16: 
Chris@16: template<typename Device, typename Tr>
Chris@16: struct stream_traits {
Chris@16:     typedef typename char_type_of<Device>::type                char_type;
Chris@16:     typedef Tr                                                 traits_type;
Chris@16:     typedef typename category_of<Device>::type                 mode;
Chris@16:     typedef typename
Chris@16:             iostreams::select< // Disambiguation required for Tru64.
Chris@16:                 mpl::and_<
Chris@16:                     is_convertible<mode, input>,
Chris@16:                     is_convertible<mode, output>
Chris@16:                 >,
Chris@16:                 BOOST_IOSTREAMS_BASIC_IOSTREAM(char_type, traits_type),
Chris@16:                 is_convertible<mode, input>,
Chris@16:                 BOOST_IOSTREAMS_BASIC_ISTREAM(char_type, traits_type),
Chris@16:                 else_,
Chris@16:                 BOOST_IOSTREAMS_BASIC_OSTREAM(char_type, traits_type)
Chris@16:             >::type stream_type;
Chris@16:     typedef typename
Chris@16:             iostreams::select< // Disambiguation required for Tru64.
Chris@16:                 mpl::and_<
Chris@16:                     is_convertible<mode, input>,
Chris@16:                     is_convertible<mode, output>
Chris@16:                 >,
Chris@16:                 iostream_tag,
Chris@16:                 is_convertible<mode, input>,
Chris@16:                 istream_tag,
Chris@16:                 else_,
Chris@16:                 ostream_tag
Chris@16:             >::type stream_tag;
Chris@16: };
Chris@16: 
Chris@16: // By encapsulating initialization in a base, we can define the macro
Chris@16: // BOOST_IOSTREAMS_DEFINE_FORWARDING_FUNCTIONS to generate constructors
Chris@16: // without base member initializer lists.
Chris@16: template< typename Device,
Chris@16:           typename Tr =
Chris@16:               BOOST_IOSTREAMS_CHAR_TRAITS(
Chris@16:                   BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
Chris@16:               ),
Chris@16:           typename Alloc =
Chris@16:               std::allocator<
Chris@16:                   BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
Chris@16:               >,
Chris@16:           typename Base = // VC6 Workaround.
Chris@16:               BOOST_DEDUCED_TYPENAME
Chris@16:               detail::stream_traits<Device, Tr>::stream_type >
Chris@16: class stream_base
Chris@16:     : protected base_from_member< stream_buffer<Device, Tr, Alloc> >,
Chris@16:       public Base
Chris@16: {
Chris@16: private:
Chris@16:     typedef base_from_member< stream_buffer<Device, Tr, Alloc> >  pbase_type;
Chris@16:     typedef typename stream_traits<Device, Tr>::stream_type       stream_type;
Chris@16: protected:
Chris@16:     using pbase_type::member; // Avoid warning about 'this' in initializer list.
Chris@16: public:
Chris@16:     stream_base() : pbase_type(), stream_type(&member) { }
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.hpp>
Chris@16: #else
Chris@16: 
Chris@16: namespace boost { namespace iostreams {
Chris@16: 
Chris@16: //
Chris@16: // Template name: stream.
Chris@16: // Description: A iostream which reads from and writes to an instance of a
Chris@16: //      designated device type.
Chris@16: // Template parameters:
Chris@16: //      Device - A device type.
Chris@16: //      Alloc - The allocator type.
Chris@16: //
Chris@16: template< typename Device,
Chris@16:           typename Tr =
Chris@16:               BOOST_IOSTREAMS_CHAR_TRAITS(
Chris@16:                   BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
Chris@16:               ),
Chris@16:           typename Alloc =
Chris@16:               std::allocator<
Chris@16:                   BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
Chris@16:               > >
Chris@16: struct stream : detail::stream_base<Device, Tr, Alloc> {
Chris@16: public:
Chris@16:     typedef typename char_type_of<Device>::type  char_type;
Chris@16:     struct category 
Chris@16:         : mode_of<Device>::type,
Chris@16:           closable_tag,
Chris@16:           detail::stream_traits<Device, Tr>::stream_tag
Chris@16:         { };
Chris@16:     BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr)
Chris@16: private:
Chris@16:     typedef typename
Chris@16:             detail::stream_traits<
Chris@16:                 Device, Tr
Chris@16:             >::stream_type                       stream_type;
Chris@16: public:
Chris@16:     stream() { }
Chris@16:     BOOST_IOSTREAMS_FORWARD( stream, open_impl, Device,
Chris@16:                              BOOST_IOSTREAMS_PUSH_PARAMS,
Chris@16:                              BOOST_IOSTREAMS_PUSH_ARGS )
Chris@16:     bool is_open() const { return this->member.is_open(); }
Chris@16:     void close() { this->member.close(); }
Chris@16:     bool auto_close() const { return this->member.auto_close(); }
Chris@16:     void set_auto_close(bool close) { this->member.set_auto_close(close); }
Chris@16:     bool strict_sync() { return this->member.strict_sync(); }
Chris@16:     Device& operator*() { return *this->member; }
Chris@16:     Device* operator->() { return &*this->member; }
Chris@16:     Device* component() { return this->member.component(); }
Chris@16: private:
Chris@16:     void open_impl(const Device& dev BOOST_IOSTREAMS_PUSH_PARAMS()) // For forwarding.
Chris@16:     { 
Chris@16:         this->clear(); 
Chris@16:         this->member.open(dev 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: #endif // #ifndef BOOST_IOSTREAMS_stream_HPP_INCLUDED