// (C) Copyright Jonathan Turkanis 2003.

 // Distributed under the Boost Software License, Version 1.0. (See accompanying

 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)

 // See http://www.boost.org/libs/iostreams for documentation.

 #ifndef BOOST_IOSTREAMS_WRITE_HPP_INCLUDED

 #define BOOST_IOSTREAMS_WRITE_HPP_INCLUDED

 #if defined(_MSC_VER) && (_MSC_VER >= 1020)

 # pragma once

 #endif

 #include <boost/config.hpp>  // DEDUCED_TYPENAME, MSVC.

 #include <boost/detail/workaround.hpp>

 #include <boost/iostreams/categories.hpp>

 #include <boost/iostreams/detail/char_traits.hpp>

 #include <boost/iostreams/detail/dispatch.hpp>

 #include <boost/iostreams/detail/ios.hpp>  // streamsize.

 #include <boost/iostreams/detail/streambuf.hpp>

 #include <boost/iostreams/detail/wrap_unwrap.hpp>

 #include <boost/iostreams/operations_fwd.hpp>

 #include <boost/iostreams/traits.hpp>

 #include <boost/mpl/if.hpp>

 // Must come last.

 #include <boost/iostreams/detail/config/disable_warnings.hpp>

 #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //-----------------------------------//

 # include <boost/iostreams/detail/vc6/write.hpp>

 #else // #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //--------------------------//

 namespace boost { namespace iostreams {

 namespace detail {

 template<typename T> 

 struct write_device_impl;

 template<typename T> 

 struct write_filter_impl;

 } // End namespace detail.

 template<typename T>

 bool put(T& t, typename char_type_of<T>::type c)

 { return detail::write_device_impl<T>::put(detail::unwrap(t), c); }

 template<typename T>

 inline std::streamsize write

     (T& t, const typename char_type_of<T>::type* s, std::streamsize n)

 { return detail::write_device_impl<T>::write(detail::unwrap(t), s, n); }

 template<typename T, typename Sink>

 inline std::streamsize

 write( T& t, Sink& snk, const typename char_type_of<T>::type* s, 

        std::streamsize n )

 { return detail::write_filter_impl<T>::write(detail::unwrap(t), snk, s, n); }

 namespace detail {

 //------------------Definition of write_device_impl---------------------------//

 template<typename T>

 struct write_device_impl

     : mpl::if_<

           is_custom<T>,

           operations<T>,

           write_device_impl<

               BOOST_DEDUCED_TYPENAME

               dispatch<

                   T, ostream_tag, streambuf_tag, output

               >::type

           >

       >::type

     { };

 template<>

 struct write_device_impl<ostream_tag> {

     template<typename T>

     static bool put(T& t, typename char_type_of<T>::type c)

     {

         typedef typename char_type_of<T>::type          char_type;

         typedef BOOST_IOSTREAMS_CHAR_TRAITS(char_type)  traits_type;

         return !traits_type::eq_int_type( t.rdbuf()->s.sputc(),

                                           traits_type::eof() );

     }

     template<typename T>

     static std::streamsize write

         (T& t, const typename char_type_of<T>::type* s, std::streamsize n)

     { return t.rdbuf()->sputn(s, n); }

 };

 template<>

 struct write_device_impl<streambuf_tag> {

     template<typename T>

     static bool put(T& t, typename char_type_of<T>::type c)

     {

         typedef typename char_type_of<T>::type          char_type;

         typedef BOOST_IOSTREAMS_CHAR_TRAITS(char_type)  traits_type;

         return !traits_type::eq_int_type(t.sputc(c), traits_type::eof());

     }

     template<typename T>

     static std::streamsize write

         (T& t, const typename char_type_of<T>::type* s, std::streamsize n)

     { return t.sputn(s, n); }

 };

 template<>

 struct write_device_impl<output> {

     template<typename T>

     static bool put(T& t, typename char_type_of<T>::type c)

     { return t.write(&c, 1) == 1; }

     template<typename T>

     static std::streamsize

     write(T& t, const typename char_type_of<T>::type* s, std::streamsize n)

     { return t.write(s, n); }

 };

 //------------------Definition of write_filter_impl---------------------------//

 template<typename T>

 struct write_filter_impl

     : mpl::if_<

           is_custom<T>,

           operations<T>,

           write_filter_impl<

               BOOST_DEDUCED_TYPENAME

               dispatch<

                   T, multichar_tag, any_tag

               >::type

           >

       >::type

     { };

 template<>

 struct write_filter_impl<multichar_tag> {

     template<typename T, typename Sink>

     static std::streamsize

     write( T& t, Sink& snk, const typename char_type_of<T>::type* s,

            std::streamsize n )

     { return t.write(snk, s, n); }

 };

 template<>

 struct write_filter_impl<any_tag> {

     template<typename T, typename Sink>

     static std::streamsize

     write( T& t, Sink& snk, const typename char_type_of<T>::type* s,

            std::streamsize n )

     {

         for (std::streamsize off = 0; off < n; ++off)

             if (!t.put(snk, s[off]))

                 return off;

         return n;

     }

 };

 } // End namespace detail.

 } } // End namespaces iostreams, boost.

 #endif // #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //-------------------------//

 #include <boost/iostreams/detail/config/enable_warnings.hpp>

 #endif // #ifndef BOOST_IOSTREAMS_WRITE_HPP_INCLUDED