Mercurial > hg > vamp-build-and-test
diff DEPENDENCIES/generic/include/boost/iostreams/combine.hpp @ 16:2665513ce2d3
Add boost headers
| author | Chris Cannam |
|---|---|
| date | Tue, 05 Aug 2014 11:11:38 +0100 |
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| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/DEPENDENCIES/generic/include/boost/iostreams/combine.hpp Tue Aug 05 11:11:38 2014 +0100 @@ -0,0 +1,260 @@ +// (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. + +// To do: add support for random-access. + +#ifndef BOOST_IOSTREAMS_COMBINE_HPP_INCLUDED +#define BOOST_IOSTREAMS_COMBINE_HPP_INCLUDED + +#if defined(_MSC_VER) && (_MSC_VER >= 1020) +# pragma once +#endif + +#include <boost/config.hpp> // NO_STD_LOCALE, DEDUCED_TYPENAME. +#ifndef BOOST_NO_STD_LOCALE +# include <locale> +#endif +#include <boost/iostreams/detail/ios.hpp> +#include <boost/iostreams/detail/wrap_unwrap.hpp> +#include <boost/iostreams/traits.hpp> +#include <boost/iostreams/operations.hpp> +#include <boost/mpl/if.hpp> +#include <boost/static_assert.hpp> +#include <boost/type_traits/is_convertible.hpp> +#include <boost/type_traits/is_same.hpp> + +// Must come last. +#include <boost/iostreams/detail/config/disable_warnings.hpp> + +namespace boost { namespace iostreams { + +namespace detail { + +// +// Template name: combined_device. +// Description: Model of Device defined in terms of a Source/Sink pair. +// Template parameters: +// Source - A model of Source, with the same char_type and traits_type +// as Sink. +// Sink - A model of Sink, with the same char_type and traits_type +// as Source. +// +template<typename Source, typename Sink> +class combined_device { +private: + typedef typename category_of<Source>::type in_category; + typedef typename category_of<Sink>::type out_category; + typedef typename char_type_of<Sink>::type sink_char_type; +public: + typedef typename char_type_of<Source>::type char_type; + struct category + : bidirectional, + device_tag, + closable_tag, + localizable_tag + { }; + BOOST_STATIC_ASSERT(is_device<Source>::value); + BOOST_STATIC_ASSERT(is_device<Sink>::value); + BOOST_STATIC_ASSERT((is_convertible<in_category, input>::value)); + BOOST_STATIC_ASSERT((is_convertible<out_category, output>::value)); + BOOST_STATIC_ASSERT((is_same<char_type, sink_char_type>::value)); + combined_device(const Source& src, const Sink& snk); + std::streamsize read(char_type* s, std::streamsize n); + std::streamsize write(const char_type* s, std::streamsize n); + void close(BOOST_IOS::openmode); + #ifndef BOOST_NO_STD_LOCALE + void imbue(const std::locale& loc); + #endif +private: + Source src_; + Sink sink_; +}; + +// +// Template name: combined_filter. +// Description: Model of Device defined in terms of a Source/Sink pair. +// Template parameters: +// InputFilter - A model of InputFilter, with the same char_type as +// OutputFilter. +// OutputFilter - A model of OutputFilter, with the same char_type as +// InputFilter. +// +template<typename InputFilter, typename OutputFilter> +class combined_filter { +private: + typedef typename category_of<InputFilter>::type in_category; + typedef typename category_of<OutputFilter>::type out_category; + typedef typename char_type_of<OutputFilter>::type output_char_type; +public: + typedef typename char_type_of<InputFilter>::type char_type; + struct category + : multichar_bidirectional_filter_tag, + closable_tag, + localizable_tag + { }; + BOOST_STATIC_ASSERT(is_filter<InputFilter>::value); + BOOST_STATIC_ASSERT(is_filter<OutputFilter>::value); + BOOST_STATIC_ASSERT((is_convertible<in_category, input>::value)); + BOOST_STATIC_ASSERT((is_convertible<out_category, output>::value)); + BOOST_STATIC_ASSERT((is_same<char_type, output_char_type>::value)); + combined_filter(const InputFilter& in, const OutputFilter& out); + + template<typename Source> + std::streamsize read(Source& src, char_type* s, std::streamsize n) + { return boost::iostreams::read(in_, src, s, n); } + + template<typename Sink> + std::streamsize write(Sink& snk, const char_type* s, std::streamsize n) + { return boost::iostreams::write(out_, snk, s, n); } + + template<typename Sink> + void close(Sink& snk, BOOST_IOS::openmode which) + { + if (which == BOOST_IOS::in) { + if (is_convertible<in_category, dual_use>::value) { + iostreams::close(in_, snk, BOOST_IOS::in); + } else { + detail::close_all(in_, snk); + } + } + if (which == BOOST_IOS::out) { + if (is_convertible<out_category, dual_use>::value) { + iostreams::close(out_, snk, BOOST_IOS::out); + } else { + detail::close_all(out_, snk); + } + } + } + #ifndef BOOST_NO_STD_LOCALE + void imbue(const std::locale& loc); + #endif +private: + InputFilter in_; + OutputFilter out_; +}; + +template<typename In, typename Out> +struct combination_traits + : mpl::if_< + is_device<In>, + combined_device< + typename wrapped_type<In>::type, + typename wrapped_type<Out>::type + >, + combined_filter< + typename wrapped_type<In>::type, + typename wrapped_type<Out>::type + > + > + { }; + +} // End namespace detail. + +template<typename In, typename Out> +struct combination : detail::combination_traits<In, Out>::type { + typedef typename detail::combination_traits<In, Out>::type base_type; + typedef typename detail::wrapped_type<In>::type in_type; + typedef typename detail::wrapped_type<Out>::type out_type; + combination(const in_type& in, const out_type& out) + : base_type(in, out) { } +}; + +namespace detail { + +// Workaround for VC6 ETI bug. +template<typename In, typename Out> +struct combine_traits { + typedef combination< + BOOST_DEDUCED_TYPENAME detail::unwrapped_type<In>::type, + BOOST_DEDUCED_TYPENAME detail::unwrapped_type<Out>::type + > type; +}; + +} // End namespace detail. + +// +// Template name: combine. +// Description: Takes a Source/Sink pair or InputFilter/OutputFilter pair and +// returns a Source or Filter which performs input using the first member +// of the pair and output using the second member of the pair. +// Template parameters: +// In - A model of Source or InputFilter, with the same char_type as Out. +// Out - A model of Sink or OutputFilter, with the same char_type as In. +// +template<typename In, typename Out> +typename detail::combine_traits<In, Out>::type +combine(const In& in, const Out& out) +{ + typedef typename detail::combine_traits<In, Out>::type return_type; + return return_type(in, out); +} + +//----------------------------------------------------------------------------// + +namespace detail { + +//--------------Implementation of combined_device-----------------------------// + +template<typename Source, typename Sink> +inline combined_device<Source, Sink>::combined_device + (const Source& src, const Sink& snk) + : src_(src), sink_(snk) { } + +template<typename Source, typename Sink> +inline std::streamsize +combined_device<Source, Sink>::read(char_type* s, std::streamsize n) +{ return iostreams::read(src_, s, n); } + +template<typename Source, typename Sink> +inline std::streamsize +combined_device<Source, Sink>::write(const char_type* s, std::streamsize n) +{ return iostreams::write(sink_, s, n); } + +template<typename Source, typename Sink> +inline void +combined_device<Source, Sink>::close(BOOST_IOS::openmode which) +{ + if (which == BOOST_IOS::in) + detail::close_all(src_); + if (which == BOOST_IOS::out) + detail::close_all(sink_); +} + +#ifndef BOOST_NO_STD_LOCALE + template<typename Source, typename Sink> + void combined_device<Source, Sink>::imbue(const std::locale& loc) + { + iostreams::imbue(src_, loc); + iostreams::imbue(sink_, loc); + } +#endif + +//--------------Implementation of filter_pair---------------------------------// + +template<typename InputFilter, typename OutputFilter> +inline combined_filter<InputFilter, OutputFilter>::combined_filter + (const InputFilter& in, const OutputFilter& out) : in_(in), out_(out) + { } + +#ifndef BOOST_NO_STD_LOCALE + template<typename InputFilter, typename OutputFilter> + void combined_filter<InputFilter, OutputFilter>::imbue + (const std::locale& loc) + { + iostreams::imbue(in_, loc); + iostreams::imbue(out_, loc); + } +#endif + + +} // End namespace detail. + +} } // End namespaces iostreams, boost. + +#include <boost/iostreams/detail/config/enable_warnings.hpp> + +#endif // #ifndef BOOST_IOSTREAMS_COMBINE_HPP_INCLUDED
