comparison DEPENDENCIES/generic/include/boost/iostreams/detail/adapter/concept_adapter.hpp @ 16:2665513ce2d3

Add boost headers

+// (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_DETAIL_CONCEPT_ADAPTER_HPP_INCLUDED
+#define BOOST_IOSTREAMS_DETAIL_CONCEPT_ADAPTER_HPP_INCLUDED
+
+#include <boost/config.hpp>                             // SFINAE.
+#include <boost/iostreams/concepts.hpp>
+#include <boost/iostreams/categories.hpp>
+#include <boost/iostreams/detail/adapter/non_blocking_adapter.hpp>
+#include <boost/iostreams/detail/call_traits.hpp>
+#include <boost/iostreams/detail/char_traits.hpp>
+#include <boost/iostreams/detail/dispatch.hpp>
+#include <boost/iostreams/detail/error.hpp>
+#include <boost/iostreams/detail/streambuf.hpp>        // pubsync.
+#include <boost/iostreams/detail/config/unreachable_return.hpp>
+#include <boost/iostreams/device/null.hpp>
+#include <boost/iostreams/traits.hpp>
+#include <boost/iostreams/operations.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/static_assert.hpp>
+#include <boost/throw_exception.hpp>
+
+// Must come last.
+#include <boost/iostreams/detail/config/disable_warnings.hpp>  // MSVC.
+
+
+namespace boost { namespace iostreams { namespace detail {
+
+template<typename Category> struct device_wrapper_impl;
+template<typename Category> struct flt_wrapper_impl;
+
+template<typename T>
+class concept_adapter {
+private:
+    typedef typename detail::value_type<T>::type       value_type;
+    typedef typename dispatch<T, input, output>::type  input_tag;
+    typedef typename dispatch<T, output, input>::type  output_tag;
+    typedef typename
+            mpl::if_<
+                is_device<T>,
+                device_wrapper_impl<input_tag>,
+                flt_wrapper_impl<input_tag>
+            >::type                                    input_impl;
+    typedef typename
+            mpl::if_<
+                is_device<T>,
+                device_wrapper_impl<output_tag>,
+                flt_wrapper_impl<output_tag>
+            >::type                                    output_impl;
+    typedef typename
+            mpl::if_<
+                is_device<T>,
+                device_wrapper_impl<any_tag>,
+                flt_wrapper_impl<any_tag>
+            >::type                                    any_impl;
+public:
+    typedef typename char_type_of<T>::type             char_type;
+    typedef typename category_of<T>::type              category;
+
+    explicit concept_adapter(const reference_wrapper<T>& ref) : t_(ref.get())
+    { BOOST_STATIC_ASSERT(is_std_io<T>::value); }
+    explicit concept_adapter(const T& t) : t_(t)
+    { BOOST_STATIC_ASSERT(!is_std_io<T>::value); }
+
+    T& operator*() { return t_; }
+    T* operator->() { return &t_; }
+
+    std::streamsize read(char_type* s, std::streamsize n)
+    { return this->read(s, n, (basic_null_source<char_type>*) 0); }
+
+    template<typename Source>
+    std::streamsize read(char_type* s, std::streamsize n, Source* src)
+    { return input_impl::read(t_, src, s, n); }
+
+    std::streamsize write(const char_type* s, std::streamsize n)
+    { return this->write(s, n, (basic_null_sink<char_type>*) 0); }
+
+    template<typename Sink>
+    std::streamsize write(const char_type* s, std::streamsize n, Sink* snk)
+    { return output_impl::write(t_, snk, s, n); }
+
+    std::streampos seek( stream_offset off, BOOST_IOS::seekdir way,
+                         BOOST_IOS::openmode which )
+    { 
+        return this->seek( off, way, which, 
+                           (basic_null_device<char_type, seekable>*) 0); 
+    }
+
+    template<typename Device>
+    std::streampos seek( stream_offset off, BOOST_IOS::seekdir way,
+                         BOOST_IOS::openmode which, Device* dev )
+    { return any_impl::seek(t_, dev, off, way, which); }
+
+    void close(BOOST_IOS::openmode which)
+    { this->close(which, (basic_null_device<char_type, seekable>*) 0); }
+
+    template<typename Device>
+    void close(BOOST_IOS::openmode which, Device* dev)
+    { any_impl::close(t_, dev, which); }
+
+    template<typename Device>
+    bool flush( Device* dev )
+    {
+        bool result = any_impl::flush(t_, dev);
+        if (dev && dev->BOOST_IOSTREAMS_PUBSYNC() == -1)
+            result = false;
+        return result;
+    }
+
+    template<typename Locale> // Avoid dependency on <locale>
+    void imbue(const Locale& loc) { iostreams::imbue(t_, loc); }
+
+    std::streamsize optimal_buffer_size() const
+    { return iostreams::optimal_buffer_size(t_); }
+public:
+    concept_adapter& operator=(const concept_adapter&);
+    value_type t_;
+};
+
+//------------------Specializations of device_wrapper_impl--------------------//
+
+template<>
+struct device_wrapper_impl<any_tag> {
+    template<typename Device, typename Dummy>
+    static std::streampos 
+    seek( Device& dev, Dummy*, stream_offset off, 
+          BOOST_IOS::seekdir way, BOOST_IOS::openmode which )
+    { 
+        typedef typename category_of<Device>::type category;
+        return seek(dev, off, way, which, category()); 
+    }
+
+    template<typename Device>
+    static std::streampos 
+    seek( Device&, stream_offset, BOOST_IOS::seekdir, 
+          BOOST_IOS::openmode, any_tag )
+    { 
+        boost::throw_exception(cant_seek());
+        BOOST_IOSTREAMS_UNREACHABLE_RETURN(0)
+    }
+
+    template<typename Device>
+    static std::streampos 
+    seek( Device& dev, stream_offset off, 
+          BOOST_IOS::seekdir way, BOOST_IOS::openmode which, 
+          random_access )
+    { 
+        return iostreams::seek(dev, off, way, which); 
+    }
+
+    template<typename Device, typename Dummy>
+    static void close(Device& dev, Dummy*, BOOST_IOS::openmode which)
+    { iostreams::close(dev, which); }
+
+    template<typename Device, typename Dummy>
+    static bool flush(Device& dev, Dummy*)
+    { return iostreams::flush(dev); }
+};
+
+
+template<>
+struct device_wrapper_impl<input> : device_wrapper_impl<any_tag>  {
+    template<typename Device, typename Dummy>
+    static std::streamsize
+    read( Device& dev, Dummy*, typename char_type_of<Device>::type* s,
+          std::streamsize n )
+    { return iostreams::read(dev, s, n); }
+
+    template<typename Device, typename Dummy>
+    static std::streamsize 
+    write( Device&, Dummy*, const typename char_type_of<Device>::type*,
+           std::streamsize )
+    { boost::throw_exception(cant_write());
+      BOOST_IOSTREAMS_UNREACHABLE_RETURN(0) }
+};
+
+template<>
+struct device_wrapper_impl<output> {
+    template<typename Device, typename Dummy>
+    static std::streamsize
+    read(Device&, Dummy*, typename char_type_of<Device>::type*, std::streamsize)
+    { boost::throw_exception(cant_read());
+      BOOST_IOSTREAMS_UNREACHABLE_RETURN(0) }
+
+    template<typename Device, typename Dummy>
+    static std::streamsize 
+    write( Device& dev, Dummy*, const typename char_type_of<Device>::type* s,
+           std::streamsize n )
+    { return iostreams::write(dev, s, n); }
+};
+
+//------------------Specializations of flt_wrapper_impl--------------------//
+
+template<>
+struct flt_wrapper_impl<any_tag> {
+    template<typename Filter, typename Device>
+    static std::streampos
+    seek( Filter& f, Device* dev, stream_offset off,
+          BOOST_IOS::seekdir way, BOOST_IOS::openmode which )
+    {
+        typedef typename category_of<Filter>::type category;
+        return seek(f, dev, off, way, which, category());
+    }
+
+    template<typename Filter, typename Device>
+    static std::streampos
+    seek( Filter&, Device*, stream_offset,
+          BOOST_IOS::seekdir, BOOST_IOS::openmode, any_tag )
+    { boost::throw_exception(cant_seek());
+      BOOST_IOSTREAMS_UNREACHABLE_RETURN(0) }
+
+    template<typename Filter, typename Device>
+    static std::streampos
+    seek( Filter& f, Device* dev, stream_offset off,
+          BOOST_IOS::seekdir way, BOOST_IOS::openmode which,
+          random_access tag )
+    {
+        typedef typename category_of<Filter>::type category;
+        return seek(f, dev, off, way, which, tag, category());
+    }
+
+    template<typename Filter, typename Device>
+    static std::streampos
+    seek( Filter& f, Device* dev, stream_offset off,
+          BOOST_IOS::seekdir way, BOOST_IOS::openmode,
+          random_access, any_tag )
+    { return f.seek(*dev, off, way); }
+
+    template<typename Filter, typename Device>
+    static std::streampos
+    seek( Filter& f, Device* dev, stream_offset off,
+          BOOST_IOS::seekdir way, BOOST_IOS::openmode which,
+          random_access, two_sequence )
+    { return f.seek(*dev, off, way, which);  }
+
+    template<typename Filter, typename Device>
+    static void close(Filter& f, Device* dev, BOOST_IOS::openmode which)
+    { iostreams::close(f, *dev, which); }
+
+    template<typename Filter, typename Device>
+    static bool flush(Filter& f, Device* dev)
+    { return iostreams::flush(f, *dev); }
+};
+
+template<>
+struct flt_wrapper_impl<input> {
+    template<typename Filter, typename Source>
+    static std::streamsize
+    read( Filter& f, Source* src, typename char_type_of<Filter>::type* s,
+          std::streamsize n )
+    { return iostreams::read(f, *src, s, n); }
+
+    template<typename Filter, typename Sink>
+    static std::streamsize 
+    write( Filter&, Sink*, const typename char_type_of<Filter>::type*, 
+           std::streamsize )
+    { boost::throw_exception(cant_write());
+      BOOST_IOSTREAMS_UNREACHABLE_RETURN(0) }
+};
+
+template<>
+struct flt_wrapper_impl<output> {
+    template<typename Filter, typename Source>
+    static std::streamsize
+    read(Filter&, Source*, typename char_type_of<Filter>::type*,std::streamsize)
+    { boost::throw_exception(cant_read());
+      BOOST_IOSTREAMS_UNREACHABLE_RETURN(0) }
+
+    template<typename Filter, typename Sink>
+    static std::streamsize 
+    write( Filter& f, Sink* snk, const typename char_type_of<Filter>::type* s,
+           std::streamsize n )
+    { return iostreams::write(f, *snk, s, n); }
+};
+
+//----------------------------------------------------------------------------//
+
+} } } // End namespaces detail, iostreams, boost.
+
+#include <boost/iostreams/detail/config/enable_warnings.hpp>  // MSVC.
+
+#endif // #ifndef BOOST_IOSTREAMS_DETAIL_CONCEPT_ADAPTER_HPP_INCLUDED