diff --git a/include/ndnboost/iostreams/detail/wrap_unwrap.hpp b/include/ndnboost/iostreams/detail/wrap_unwrap.hpp
new file mode 100644
index 0000000..93291df
--- /dev/null
+++ b/include/ndnboost/iostreams/detail/wrap_unwrap.hpp
@@ -0,0 +1,127 @@
+// (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 NDNBOOST_IOSTREAMS_DETAIL_WRAP_UNWRAP_HPP_INCLUDED
+#define NDNBOOST_IOSTREAMS_DETAIL_WRAP_UNWRAP_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif              
+
+#include <ndnboost/config.hpp>                             // SFINAE, MSVC.
+#include <ndnboost/detail/workaround.hpp>
+#include <ndnboost/iostreams/detail/enable_if_stream.hpp>
+#include <ndnboost/iostreams/traits_fwd.hpp>               // is_std_io.
+#include <ndnboost/mpl/bool.hpp>
+#include <ndnboost/mpl/identity.hpp>
+#include <ndnboost/mpl/eval_if.hpp>
+#include <ndnboost/mpl/if.hpp>
+#include <ndnboost/ref.hpp>
+
+namespace ndnboost { namespace iostreams { namespace detail {
+                    
+//------------------Definition of wrap/unwrap traits--------------------------//
+
+template<typename T>
+struct wrapped_type 
+    : mpl::if_<is_std_io<T>, reference_wrapper<T>, T>
+    { };
+
+template<typename T>
+struct unwrapped_type 
+    : unwrap_reference<T>
+    { };
+
+template<typename T>
+struct unwrap_ios 
+    : mpl::eval_if<
+          is_std_io<T>, 
+          unwrap_reference<T>, 
+          mpl::identity<T>
+      >
+    { };
+
+//------------------Definition of wrap----------------------------------------//
+
+#ifndef NDNBOOST_NO_SFINAE //----------------------------------------------------//
+    template<typename T>
+    inline T wrap(const T& t NDNBOOST_IOSTREAMS_DISABLE_IF_STREAM(T)) 
+    { return t; }
+
+    template<typename T>
+    inline typename wrapped_type<T>::type
+    wrap(T& t NDNBOOST_IOSTREAMS_ENABLE_IF_STREAM(T)) { return ndnboost::ref(t); }
+#else // #ifndef NDNBOOST_NO_SFINAE //-------------------------------------------//
+    template<typename T>
+    inline typename wrapped_type<T>::type // BCC 5.x needs namespace qualification.
+    wrap_impl(const T& t, mpl::true_) { return ndnboost::ref(const_cast<T&>(t)); }
+
+    template<typename T>
+    inline typename wrapped_type<T>::type // BCC 5.x needs namespace qualification.
+    wrap_impl(T& t, mpl::true_) { return ndnboost::ref(t); }
+
+    template<typename T>
+    inline typename wrapped_type<T>::type 
+    wrap_impl(const T& t, mpl::false_) { return t; }
+
+    template<typename T>
+    inline typename wrapped_type<T>::type 
+    wrap_impl(T& t, mpl::false_) { return t; }
+
+    template<typename T>
+    inline typename wrapped_type<T>::type 
+    wrap(const T& t) { return wrap_impl(t, is_std_io<T>()); }
+
+    template<typename T>
+    inline typename wrapped_type<T>::type 
+    wrap(T& t) { return wrap_impl(t, is_std_io<T>()); }
+#endif // #ifndef NDNBOOST_NO_SFINAE //------------------------------------------//
+
+//------------------Definition of unwrap--------------------------------------//
+
+#if !NDNBOOST_WORKAROUND(NDNBOOST_MSVC, < 1310) //----------------------------------//
+
+template<typename T>
+typename unwrapped_type<T>::type& 
+unwrap(const reference_wrapper<T>& ref) { return ref.get(); }
+
+template<typename T>
+typename unwrapped_type<T>::type& unwrap(T& t) { return t; }
+
+template<typename T>
+const typename unwrapped_type<T>::type& unwrap(const T& t) { return t; }
+
+#else // #if !NDNBOOST_WORKAROUND(NDNBOOST_MSVC, < 1310) //-------------------------//
+
+// Since unwrap is a potential bottleneck, we avoid runtime tag dispatch.
+template<bool IsRefWrap>
+struct unwrap_impl;
+
+template<>
+struct unwrap_impl<true> {
+    template<typename T>
+    static typename unwrapped_type<T>::type& unwrap(const T& t) 
+    { return t.get(); }
+};
+
+template<>
+struct unwrap_impl<false> {
+    template<typename T>
+    static typename unwrapped_type<T>::type& unwrap(const T& t) 
+    { return const_cast<T&>(t); }
+};
+
+template<typename T>
+typename unwrapped_type<T>::type& 
+unwrap(const T& t) 
+{ return unwrap_impl<is_reference_wrapper<T>::value>::unwrap(t); }
+
+#endif // #if !NDNBOOST_WORKAROUND(NDNBOOST_MSVC, < 1310) //------------------------//
+
+} } } // End namespaces detail, iostreams, boost.
+
+#endif // #ifndef NDNBOOST_IOSTREAMS_DETAIL_WRAP_UNWRAP_HPP_INCLUDED