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_HPP_INCLUDED
sl@0: #define BOOST_IOSTREAMS_STREAM_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 <boost/iostreams/constants.hpp>
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/iostream.hpp>  // standard streams.
sl@0: #include <boost/iostreams/detail/select.hpp>
sl@0: #include <boost/iostreams/stream_buffer.hpp>
sl@0: #include <boost/mpl/and.hpp>
sl@0: #include <boost/type_traits/is_convertible.hpp>
sl@0: 
sl@0: namespace boost { namespace iostreams { namespace detail {
sl@0: 
sl@0: template<typename Device, typename Tr>
sl@0: struct stream_traits {
sl@0:     typedef typename char_type_of<Device>::type                char_type;
sl@0:     typedef Tr                                                 traits_type;
sl@0:     typedef typename category_of<Device>::type                 mode;
sl@0:     typedef typename
sl@0:             iostreams::select< // Dismbiguation required for Tru64.
sl@0:                 mpl::and_<
sl@0:                     is_convertible<mode, input>,
sl@0:                     is_convertible<mode, output>
sl@0:                 >,
sl@0:                 BOOST_IOSTREAMS_BASIC_IOSTREAM(char_type, traits_type),
sl@0:                 is_convertible<mode, input>,
sl@0:                 BOOST_IOSTREAMS_BASIC_ISTREAM(char_type, traits_type),
sl@0:                 else_,
sl@0:                 BOOST_IOSTREAMS_BASIC_OSTREAM(char_type, traits_type)
sl@0:             >::type type;
sl@0: };
sl@0: 
sl@0: // By encapsulating initialization in a base, we can define the macro
sl@0: // BOOST_IOSTREAMS_DEFINE_FORWARDING_FUNCTIONS to generate constuctors
sl@0: // without base member initializer lists.
sl@0: template< typename Device,
sl@0:           typename Tr =
sl@0:               BOOST_IOSTREAMS_CHAR_TRAITS(
sl@0:                   BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
sl@0:               ),
sl@0:           typename Alloc =
sl@0:               std::allocator<
sl@0:                   BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
sl@0:               >,
sl@0:           typename Base = // VC6 Workaround.
sl@0:               BOOST_DEDUCED_TYPENAME
sl@0:               detail::stream_traits<Device, Tr>::type >
sl@0: class stream_base
sl@0:     : protected base_from_member< stream_buffer<Device, Tr, Alloc> >,
sl@0:       public Base
sl@0: {
sl@0: private:
sl@0:     typedef base_from_member< stream_buffer<Device, Tr, Alloc> > pbase_type;
sl@0:     typedef typename stream_traits<Device, Tr>::type         stream_type;
sl@0: protected:
sl@0:     using pbase_type::member; // Avoid warning about 'this' in initializer list.
sl@0: public:
sl@0:     stream_base() : pbase_type(), stream_type(&member) { }
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.hpp>
sl@0: #else
sl@0: 
sl@0: namespace boost { namespace iostreams {
sl@0: 
sl@0: //
sl@0: // Template name: stream.
sl@0: // Description: A iostream which reads from and writes to an instance of a
sl@0: //      designated device type.
sl@0: // Template paramters:
sl@0: //      Device - A device type.
sl@0: //      Alloc - The allocator type.
sl@0: //
sl@0: template< typename Device,
sl@0:           typename Tr =
sl@0:               BOOST_IOSTREAMS_CHAR_TRAITS(
sl@0:                   BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
sl@0:               ),
sl@0:           typename Alloc =
sl@0:               std::allocator<
sl@0:                   BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
sl@0:               > >
sl@0: struct stream : detail::stream_base<Device, Tr, Alloc> {
sl@0: public:
sl@0:     typedef typename char_type_of<Device>::type  char_type;
sl@0:     BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr)
sl@0: private:
sl@0:     typedef typename
sl@0:             detail::stream_traits<
sl@0:                 Device, Tr
sl@0:             >::type                              stream_type;
sl@0:     typedef Device                               policy_type;
sl@0: public:
sl@0:     stream() { }
sl@0:     BOOST_IOSTREAMS_FORWARD( stream, open_impl, Device,
sl@0:                              BOOST_IOSTREAMS_PUSH_PARAMS,
sl@0:                              BOOST_IOSTREAMS_PUSH_ARGS )
sl@0:     bool is_open() const { return this->member.is_open(); }
sl@0:     void close() { this->member.close(); }
sl@0:     bool auto_close() const { return this->member.auto_close(); }
sl@0:     void set_auto_close(bool close) { this->member.set_auto_close(close); }
sl@0:     bool strict_sync() { return this->member.strict_sync(); }
sl@0:     Device& operator*() { return *this->member; }
sl@0:     Device* operator->() { return &*this->member; }
sl@0:     Device* component() { return this->member.component(); }
sl@0: private:
sl@0:     void open_impl(const Device& dev BOOST_IOSTREAMS_PUSH_PARAMS()) // For forwarding.
sl@0:     { 
sl@0:         this->clear(); 
sl@0:         this->member.open(dev 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: #endif // #ifndef BOOST_IOSTREAMS_stream_HPP_INCLUDED