Chris@16: // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
Chris@16: // (C) Copyright 2005-2007 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: namespace boost { namespace iostreams {
Chris@16: 
Chris@16: namespace detail {
Chris@16: 
Chris@16: template<typename T> 
Chris@16: struct write_device_impl;
Chris@16: 
Chris@16: template<typename T> 
Chris@16: struct write_filter_impl;
Chris@16: 
Chris@16: } // End namespace detail.
Chris@16: 
Chris@16: template<typename T>
Chris@16: bool put(T& t, typename char_type_of<T>::type c)
Chris@16: {
Chris@16:     typedef typename detail::unwrapped_type<T>::type unwrapped;
Chris@16:     return detail::write_device_impl<T>::inner<unwrapped>::put(detail::unwrap(t), c);
Chris@16: }
Chris@16: 
Chris@16: template<typename T>
Chris@16: inline std::streamsize write
Chris@16:     (T& t, const typename char_type_of<T>::type* s, std::streamsize n)
Chris@16: {
Chris@16:     typedef typename detail::unwrapped_type<T>::type unwrapped;
Chris@16:     return detail::write_device_impl<T>::inner<unwrapped>::write(detail::unwrap(t), s, n);
Chris@16: }
Chris@16: 
Chris@16: template<typename T, typename Sink>
Chris@16: inline std::streamsize
Chris@16: write( T& t, Sink& snk, const typename char_type_of<T>::type* s, 
Chris@16:        std::streamsize n )
Chris@16: {
Chris@16:     typedef typename detail::unwrapped_type<T>::type unwrapped;
Chris@16:     return detail::write_filter_impl<T>::inner<unwrapped>::write(detail::unwrap(t), snk, s, n);
Chris@16: }
Chris@16: 
Chris@16: namespace detail {
Chris@16: 
Chris@16: //------------------Definition of write_device_impl---------------------------//
Chris@16: 
Chris@16: template<typename T>
Chris@16: struct write_device_impl
Chris@16:     : mpl::if_<
Chris@16:           is_custom<T>,
Chris@16:           operations<T>,
Chris@16:           write_device_impl<
Chris@16:               BOOST_DEDUCED_TYPENAME
Chris@16:               dispatch<
Chris@16:                   T, ostream_tag, streambuf_tag, output
Chris@16:               >::type
Chris@16:           >
Chris@16:       >::type
Chris@16:     { };
Chris@16: 
Chris@16: template<>
Chris@16: struct write_device_impl<ostream_tag> {
Chris@16:     template<typename T>
Chris@16:     struct inner {
Chris@16:         static bool put(T& t, typename char_type_of<T>::type c)
Chris@16:         {
Chris@16:             typedef typename char_type_of<T>::type          char_type;
Chris@16:             typedef BOOST_IOSTREAMS_CHAR_TRAITS(char_type)  traits_type;
Chris@16:             return !traits_type::eq_int_type( t.rdbuf()->s.sputc(),
Chris@16:                                             traits_type::eof() );
Chris@16:         }
Chris@16: 
Chris@16:         static std::streamsize write
Chris@16:             (T& t, const typename char_type_of<T>::type* s, std::streamsize n)
Chris@16:         { return t.rdbuf()->sputn(s, n); }
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct write_device_impl<streambuf_tag> {
Chris@16:     template<typename T>
Chris@16:     struct inner {
Chris@16:         static bool put(T& t, typename char_type_of<T>::type c)
Chris@16:         {
Chris@16:             typedef typename char_type_of<T>::type          char_type;
Chris@16:             typedef BOOST_IOSTREAMS_CHAR_TRAITS(char_type)  traits_type;
Chris@16:             return !traits_type::eq_int_type(t.sputc(c), traits_type::eof());
Chris@16:         }
Chris@16: 
Chris@16:         template<typename T>
Chris@16:         static std::streamsize write
Chris@16:             (T& t, const typename char_type_of<T>::type* s, std::streamsize n)
Chris@16:         { return t.sputn(s, n); }
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct write_device_impl<output> {
Chris@16:     template<typename T>
Chris@16:     struct inner {
Chris@16:         static bool put(T& t, typename char_type_of<T>::type c)
Chris@16:         { return t.write(&c, 1) == 1; }
Chris@16: 
Chris@16:         template<typename T>
Chris@16:         static std::streamsize
Chris@16:         write(T& t, const typename char_type_of<T>::type* s, std::streamsize n)
Chris@16:         { return t.write(s, n); }
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: //------------------Definition of write_filter_impl---------------------------//
Chris@16: 
Chris@16: template<typename T>
Chris@16: struct write_filter_impl
Chris@16:     : mpl::if_<
Chris@16:           is_custom<T>,
Chris@16:           operations<T>,
Chris@16:           write_filter_impl<
Chris@16:               BOOST_DEDUCED_TYPENAME
Chris@16:               dispatch<
Chris@16:                   T, multichar_tag, any_tag
Chris@16:               >::type
Chris@16:           >
Chris@16:       >::type
Chris@16:     { };
Chris@16: 
Chris@16: template<>
Chris@16: struct write_filter_impl<multichar_tag> {
Chris@16:     template<typename T>
Chris@16:     struct inner {
Chris@16:         template<typename Sink>
Chris@16:         static std::streamsize
Chris@16:         write( T& t, Sink& snk, const typename char_type_of<T>::type* s,
Chris@16:                std::streamsize n )
Chris@16:         { return t.write(snk, s, n); }
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct write_filter_impl<any_tag> {
Chris@16:     template<typename T>
Chris@16:     struct inner {
Chris@16:         template<typename Sink>
Chris@16:         static std::streamsize
Chris@16:         write( T& t, Sink& snk, const typename char_type_of<T>::type* s,
Chris@16:                std::streamsize n )
Chris@16:         {
Chris@16:             for (std::streamsize off = 0; off < n; ++off)
Chris@16:                 if (!t.put(snk, s[off]))
Chris@16:                     return off;
Chris@16:             return n;
Chris@16:         }
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: } // End namespace detail.
Chris@16: 
Chris@16: } } // End namespaces iostreams, boost.