// (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