ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/iostreams/tee.hpp b/include/ndnboost/iostreams/tee.hpp
new file mode 100644
index 0000000..a7c3cbb
--- /dev/null
+++ b/include/ndnboost/iostreams/tee.hpp
@@ -0,0 +1,232 @@
+// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
+// (C) Copyright 2005-2007 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 NDNBOOST_IOSTREAMS_TEE_HPP_INCLUDED
+#define NDNBOOST_IOSTREAMS_TEE_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <ndnboost/assert.hpp>
+#include <ndnboost/config.hpp> // NDNBOOST_DEDUCE_TYPENAME.
+#include <ndnboost/iostreams/categories.hpp>
+#include <ndnboost/iostreams/detail/adapter/device_adapter.hpp>
+#include <ndnboost/iostreams/detail/adapter/filter_adapter.hpp>
+#include <ndnboost/iostreams/detail/call_traits.hpp>
+#include <ndnboost/iostreams/detail/execute.hpp>
+#include <ndnboost/iostreams/detail/functional.hpp> // call_close_all
+#include <ndnboost/iostreams/operations.hpp>
+#include <ndnboost/iostreams/pipeline.hpp>
+#include <ndnboost/iostreams/traits.hpp>
+#include <ndnboost/static_assert.hpp>
+#include <ndnboost/type_traits/is_convertible.hpp>
+#include <ndnboost/type_traits/is_same.hpp>
+
+namespace ndnboost { namespace iostreams {
+
+//
+// Template name: tee_filter.
+// Template parameters:
+// Device - A blocking Sink.
+//
+template<typename Device>
+class tee_filter : public detail::filter_adapter<Device> {
+public:
+ typedef typename detail::param_type<Device>::type param_type;
+ typedef typename char_type_of<Device>::type char_type;
+ struct category
+ : dual_use_filter_tag,
+ multichar_tag,
+ closable_tag,
+ flushable_tag,
+ localizable_tag,
+ optimally_buffered_tag
+ { };
+
+ NDNBOOST_STATIC_ASSERT(is_device<Device>::value);
+ NDNBOOST_STATIC_ASSERT((
+ is_convertible< // Using mode_of causes failures on VC6-7.0.
+ NDNBOOST_DEDUCED_TYPENAME iostreams::category_of<Device>::type, output
+ >::value
+ ));
+
+ explicit tee_filter(param_type dev)
+ : detail::filter_adapter<Device>(dev)
+ { }
+
+ template<typename Source>
+ std::streamsize read(Source& src, char_type* s, std::streamsize n)
+ {
+ std::streamsize result = iostreams::read(src, s, n);
+ if (result != -1) {
+ std::streamsize result2 = iostreams::write(this->component(), s, result);
+ (void) result2; // Suppress 'unused variable' warning.
+ NDNBOOST_ASSERT(result == result2);
+ }
+ return result;
+ }
+
+ template<typename Sink>
+ std::streamsize write(Sink& snk, const char_type* s, std::streamsize n)
+ {
+ std::streamsize result = iostreams::write(snk, s, n);
+ std::streamsize result2 = iostreams::write(this->component(), s, result);
+ (void) result2; // Suppress 'unused variable' warning.
+ NDNBOOST_ASSERT(result == result2);
+ return result;
+ }
+
+ template<typename Next>
+ void close(Next&, NDNBOOST_IOS::openmode)
+ {
+ detail::close_all(this->component());
+ }
+
+ template<typename Sink>
+ bool flush(Sink& snk)
+ {
+ bool r1 = iostreams::flush(snk);
+ bool r2 = iostreams::flush(this->component());
+ return r1 && r2;
+ }
+};
+NDNBOOST_IOSTREAMS_PIPABLE(tee_filter, 1)
+
+//
+// Template name: tee_device.
+// Template parameters:
+// Device - A blocking Device.
+// Sink - A blocking Sink.
+//
+template<typename Device, typename Sink>
+class tee_device {
+public:
+ typedef typename detail::param_type<Device>::type device_param;
+ typedef typename detail::param_type<Sink>::type sink_param;
+ typedef typename detail::value_type<Device>::type device_value;
+ typedef typename detail::value_type<Sink>::type sink_value;
+ typedef typename char_type_of<Device>::type char_type;
+ typedef typename
+ mpl::if_<
+ is_convertible<
+ NDNBOOST_DEDUCED_TYPENAME
+ iostreams::category_of<Device>::type,
+ output
+ >,
+ output,
+ input
+ >::type mode;
+ NDNBOOST_STATIC_ASSERT(is_device<Device>::value);
+ NDNBOOST_STATIC_ASSERT(is_device<Sink>::value);
+ NDNBOOST_STATIC_ASSERT((
+ is_same<
+ char_type,
+ NDNBOOST_DEDUCED_TYPENAME char_type_of<Sink>::type
+ >::value
+ ));
+ NDNBOOST_STATIC_ASSERT((
+ is_convertible<
+ NDNBOOST_DEDUCED_TYPENAME iostreams::category_of<Sink>::type,
+ output
+ >::value
+ ));
+ struct category
+ : mode,
+ device_tag,
+ closable_tag,
+ flushable_tag,
+ localizable_tag,
+ optimally_buffered_tag
+ { };
+ tee_device(device_param device, sink_param sink)
+ : dev_(device), sink_(sink)
+ { }
+ std::streamsize read(char_type* s, std::streamsize n)
+ {
+ NDNBOOST_STATIC_ASSERT((
+ is_convertible<
+ NDNBOOST_DEDUCED_TYPENAME iostreams::category_of<Device>::type, input
+ >::value
+ ));
+ std::streamsize result1 = iostreams::read(dev_, s, n);
+ if (result1 != -1) {
+ std::streamsize result2 = iostreams::write(sink_, s, result1);
+ (void) result1; // Suppress 'unused variable' warning.
+ (void) result2;
+ NDNBOOST_ASSERT(result1 == result2);
+ }
+ return result1;
+ }
+ std::streamsize write(const char_type* s, std::streamsize n)
+ {
+ NDNBOOST_STATIC_ASSERT((
+ is_convertible<
+ NDNBOOST_DEDUCED_TYPENAME iostreams::category_of<Device>::type, output
+ >::value
+ ));
+ std::streamsize result1 = iostreams::write(dev_, s, n);
+ std::streamsize result2 = iostreams::write(sink_, s, n);
+ (void) result1; // Suppress 'unused variable' warning.
+ (void) result2;
+ NDNBOOST_ASSERT(result1 == n && result2 == n);
+ return n;
+ }
+ void close()
+ {
+ detail::execute_all( detail::call_close_all(dev_),
+ detail::call_close_all(sink_) );
+ }
+ bool flush()
+ {
+ bool r1 = iostreams::flush(dev_);
+ bool r2 = iostreams::flush(sink_);
+ return r1 && r2;
+ }
+ template<typename Locale>
+ void imbue(const Locale& loc)
+ {
+ iostreams::imbue(dev_, loc);
+ iostreams::imbue(sink_, loc);
+ }
+ std::streamsize optimal_buffer_size() const
+ {
+ return (std::max) ( iostreams::optimal_buffer_size(dev_),
+ iostreams::optimal_buffer_size(sink_) );
+ }
+private:
+ device_value dev_;
+ sink_value sink_;
+};
+
+template<typename Sink>
+tee_filter<Sink> tee(Sink& snk)
+{ return tee_filter<Sink>(snk); }
+
+template<typename Sink>
+tee_filter<Sink> tee(const Sink& snk)
+{ return tee_filter<Sink>(snk); }
+
+template<typename Device, typename Sink>
+tee_device<Device, Sink> tee(Device& dev, Sink& sink)
+{ return tee_device<Device, Sink>(dev, sink); }
+
+template<typename Device, typename Sink>
+tee_device<Device, Sink> tee(const Device& dev, Sink& sink)
+{ return tee_device<Device, Sink>(dev, sink); }
+
+template<typename Device, typename Sink>
+tee_device<Device, Sink> tee(Device& dev, const Sink& sink)
+{ return tee_device<Device, Sink>(dev, sink); }
+
+template<typename Device, typename Sink>
+tee_device<Device, Sink> tee(const Device& dev, const Sink& sink)
+{ return tee_device<Device, Sink>(dev, sink); }
+
+} } // End namespaces iostreams, boost.
+
+#endif // #ifndef NDNBOOST_IOSTREAMS_TEE_HPP_INCLUDED