ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/iostreams/detail/vc6/close.hpp b/include/ndnboost/iostreams/detail/vc6/close.hpp
new file mode 100644
index 0000000..2fddd11
--- /dev/null
+++ b/include/ndnboost/iostreams/detail/vc6/close.hpp
@@ -0,0 +1,129 @@
+// (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.
+
+namespace ndnboost { namespace iostreams {
+
+namespace detail {
+
+template<typename T>
+struct close_impl;
+
+} // End namespace detail.
+
+template<typename T>
+void close(T& t) { detail::close_all(t); }
+
+template<typename T>
+void close(T& t, NDNBOOST_IOS::openmode which)
+{
+    typedef typename detail::unwrapped_type<T>::type unwrapped;
+    detail::close_impl<T>::inner<unwrapped>::close(detail::unwrap(t), which);
+}
+
+template<typename T, typename Sink>
+void close(T& t, Sink& snk, NDNBOOST_IOS::openmode which)
+{
+    typedef typename detail::unwrapped_type<T>::type unwrapped;
+    detail::close_impl<T>::inner<unwrapped>::close(detail::unwrap(t), snk, which);
+}
+
+namespace detail {
+
+//------------------Definition of close_impl----------------------------------//
+
+template<typename T>
+struct close_tag {
+    typedef typename category_of<T>::type category;
+    typedef typename
+            mpl::eval_if<
+                is_convertible<category, closable_tag>,
+                mpl::if_<
+                    mpl::or_<
+                        is_convertible<category, two_sequence>,
+                        is_convertible<category, dual_use>
+                    >,
+                    two_sequence,
+                    closable_tag
+                >,
+                mpl::identity<any_tag>
+            >::type type;
+};
+
+template<typename T>
+struct close_impl
+    : mpl::if_<
+          is_custom<T>,
+          operations<T>,
+          close_impl<NDNBOOST_DEDUCED_TYPENAME close_tag<T>::type>
+      >::type
+    { };
+
+template<>
+struct close_impl<any_tag> {
+    template<typename T>
+    struct inner {
+        static void close(T& t, NDNBOOST_IOS::openmode which)
+        {
+            if (which == NDNBOOST_IOS::out)
+                iostreams::flush(t);
+        }
+
+        template<typename Sink>
+        static void close(T& t, Sink& snk, NDNBOOST_IOS::openmode which)
+        {
+            if (which == NDNBOOST_IOS::out) {
+                non_blocking_adapter<Sink> nb(snk);
+                iostreams::flush(t, nb);
+            }
+        }
+    };
+};
+
+template<>
+struct close_impl<closable_tag> {
+    template<typename T>
+    struct inner {
+        static void close(T& t, NDNBOOST_IOS::openmode which)
+        {
+            typedef typename category_of<T>::type category;
+            const bool in =  is_convertible<category, input>::value &&
+                            !is_convertible<category, output>::value;
+            if (in == (which == NDNBOOST_IOS::in))
+                t.close();
+        }
+        template<typename Sink>
+        static void close(T& t, Sink& snk, NDNBOOST_IOS::openmode which)
+        {
+            typedef typename category_of<T>::type category;
+            const bool in =  is_convertible<category, input>::value &&
+                            !is_convertible<category, output>::value;
+            if (in == (which == NDNBOOST_IOS::in)) {
+                non_blocking_adapter<Sink> nb(snk);
+                t.close(nb);
+            }
+        }
+    };
+};
+
+template<>
+struct close_impl<two_sequence> {
+    template<typename T>
+    struct inner {
+        static void close(T& t, NDNBOOST_IOS::openmode which) { t.close(which); }
+
+        template<typename Sink>
+        static void close(T& t, Sink& snk, NDNBOOST_IOS::openmode which)
+        {
+            non_blocking_adapter<Sink> nb(snk);
+            t.close(nb, which);
+        }
+    };
+};
+
+} // End namespace detail.
+
+} } // End namespaces iostreams, boost.