ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/iostreams/filter/counter.hpp b/include/ndnboost/iostreams/filter/counter.hpp
new file mode 100644
index 0000000..4780c16
--- /dev/null
+++ b/include/ndnboost/iostreams/filter/counter.hpp
@@ -0,0 +1,82 @@
+// (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_COUNTER_HPP_INCLUDED
+#define NDNBOOST_IOSTREAMS_COUNTER_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <algorithm> // count.
+#include <ndnboost/iostreams/categories.hpp>
+#include <ndnboost/iostreams/char_traits.hpp>
+#include <ndnboost/iostreams/operations.hpp>
+#include <ndnboost/iostreams/pipeline.hpp>
+
+// Must come last.
+#include <ndnboost/iostreams/detail/config/disable_warnings.hpp> // VC7.1 C4244.
+
+namespace ndnboost { namespace iostreams {
+
+//
+// Template name: basic_counter.
+// Template parameters:
+// Ch - The character type.
+// Description: Filter which counts lines and characters.
+//
+template<typename Ch>
+class basic_counter {
+public:
+ typedef Ch char_type;
+ struct category
+ : dual_use,
+ filter_tag,
+ multichar_tag,
+ optimally_buffered_tag
+ { };
+ explicit basic_counter(int first_line = 0, int first_char = 0)
+ : lines_(first_line), chars_(first_char)
+ { }
+ int lines() const { return lines_; }
+ int characters() const { return chars_; }
+ std::streamsize optimal_buffer_size() const { return 0; }
+
+ 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)
+ return -1;
+ lines_ += std::count(s, s + result, char_traits<Ch>::newline());
+ chars_ += result;
+ 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);
+ lines_ += std::count(s, s + result, char_traits<Ch>::newline());
+ chars_ += result;
+ return result;
+ }
+private:
+ int lines_;
+ int chars_;
+};
+NDNBOOST_IOSTREAMS_PIPABLE(basic_counter, 1)
+
+
+typedef basic_counter<char> counter;
+typedef basic_counter<wchar_t> wcounter;
+
+} } // End namespaces iostreams, boost.
+
+#include <ndnboost/iostreams/detail/config/enable_warnings.hpp>
+
+#endif // #ifndef NDNBOOST_IOSTREAMS_COUNTER_HPP_INCLUDED