ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/iostreams/device/null.hpp b/include/ndnboost/iostreams/device/null.hpp
new file mode 100644
index 0000000..66abd9b
--- /dev/null
+++ b/include/ndnboost/iostreams/device/null.hpp
@@ -0,0 +1,66 @@
+// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
+// (C) Copyright 2004-2007 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.
+
+// Inspired by Daryle Walker's nullbuf from his More I/O submission.
+
+#ifndef NDNBOOST_IOSTREAMS_NULL_HPP_INCLUDED
+#define NDNBOOST_IOSTREAMS_NULL_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <ndnboost/iostreams/categories.hpp>
+#include <ndnboost/iostreams/detail/ios.hpp> // openmode, streamsize.
+#include <ndnboost/iostreams/positioning.hpp>
+
+namespace ndnboost { namespace iostreams {
+
+template<typename Ch, typename Mode>
+class basic_null_device {
+public:
+ typedef Ch char_type;
+ struct category
+ : public Mode,
+ public device_tag,
+ public closable_tag
+ { };
+ std::streamsize read(Ch*, std::streamsize) { return 0; }
+ std::streamsize write(const Ch*, std::streamsize n) { return n; }
+ std::streampos seek( stream_offset, NDNBOOST_IOS::seekdir,
+ NDNBOOST_IOS::openmode =
+ NDNBOOST_IOS::in | NDNBOOST_IOS::out )
+ { return -1; }
+ void close() { }
+ void close(NDNBOOST_IOS::openmode) { }
+};
+
+template<typename Ch>
+struct basic_null_source : private basic_null_device<Ch, input> {
+ typedef Ch char_type;
+ typedef source_tag category;
+ using basic_null_device<Ch, input>::read;
+ using basic_null_device<Ch, input>::close;
+};
+
+typedef basic_null_source<char> null_source;
+typedef basic_null_source<wchar_t> wnull_source;
+
+template<typename Ch>
+struct basic_null_sink : private basic_null_device<Ch, output> {
+ typedef Ch char_type;
+ typedef sink_tag category;
+ using basic_null_device<Ch, output>::write;
+ using basic_null_device<Ch, output>::close;
+};
+
+typedef basic_null_sink<char> null_sink;
+typedef basic_null_sink<wchar_t> wnull_sink;
+
+} } // End namespaces iostreams, boost.
+
+#endif // #ifndef NDNBOOST_IOSTREAMS_NULL_HPP_INCLUDED