diff --git a/include/ndnboost/iostreams/detail/counted_array.hpp b/include/ndnboost/iostreams/detail/counted_array.hpp
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+++ b/include/ndnboost/iostreams/detail/counted_array.hpp
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+// (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_DETAIL_COUNTED_ARRAY_HPP_INCLUDED
+#define NDNBOOST_IOSTREAMS_DETAIL_COUNTED_ARRAY_HPP_INCLUDED
+
+#include <algorithm>                               // min.
+#include <ndnboost/iostreams/categories.hpp>
+#include <ndnboost/iostreams/detail/char_traits.hpp>
+#include <ndnboost/iostreams/detail/ios.hpp>          // streamsize.
+
+namespace ndnboost { namespace iostreams { namespace detail {
+
+template<typename Ch>
+class counted_array_source {
+public:
+    typedef Ch          char_type;
+    typedef source_tag  category;
+    counted_array_source(const Ch* buf, std::streamsize size) 
+        : buf_(buf), ptr_(0), end_(size)
+        { }
+    std::streamsize read(Ch* s, std::streamsize n)
+    {
+        std::streamsize result = (std::min)(n, end_ - ptr_);
+        NDNBOOST_IOSTREAMS_CHAR_TRAITS(char_type)::copy
+            (s, buf_ + ptr_, result);
+        ptr_ += result;
+        return result;
+    }
+    std::streamsize count() const { return ptr_; }
+private:
+    const Ch*        buf_;
+    std::streamsize  ptr_, end_;
+};
+
+template<typename Ch>
+struct counted_array_sink {
+public:
+    typedef Ch        char_type;
+    typedef sink_tag  category;
+    counted_array_sink(Ch* buf, std::streamsize size) 
+        : buf_(buf), ptr_(0), end_(size)
+        { }
+        std::streamsize write(const Ch* s, std::streamsize n)
+    {
+        std::streamsize result = (std::min)(n, end_ - ptr_);
+        NDNBOOST_IOSTREAMS_CHAR_TRAITS(char_type)::copy
+            (buf_ + ptr_, s, result);
+        ptr_ += result;
+        return result;
+    }
+    std::streamsize count() const { return ptr_; }
+private:
+    Ch*              buf_;
+    std::streamsize  ptr_, end_;
+};
+
+} } } // End namespaces iostreams, boost.
+
+#endif // #ifndef NDNBOOST_IOSTREAMS_DETAIL_COUNTED_ARRAY_HPP_INCLUDED