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Editing: write.hpp
// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) // (C) Copyright 2003-2007 Jonathan Turkanis // 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) # 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> 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()->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.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. #include <boost/iostreams/detail/config/enable_warnings.hpp> #endif // #ifndef BOOST_IOSTREAMS_WRITE_HPP_INCLUDED
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