ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/random/detail/integer_log2.hpp b/include/ndnboost/random/detail/integer_log2.hpp
new file mode 100644
index 0000000..f7429af
--- /dev/null
+++ b/include/ndnboost/random/detail/integer_log2.hpp
@@ -0,0 +1,84 @@
+/* boost random/detail/integer_log2.hpp header file
+ *
+ * Copyright Steven Watanabe 2011
+ * 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 for most recent version including documentation.
+ *
+ * $Id: integer_log2.hpp 83381 2013-03-09 22:55:05Z eric_niebler $
+ *
+ */
+
+#ifndef NDNBOOST_RANDOM_DETAIL_INTEGER_LOG2_HPP
+#define NDNBOOST_RANDOM_DETAIL_INTEGER_LOG2_HPP
+
+#include <ndnboost/config.hpp>
+#include <ndnboost/limits.hpp>
+#include <ndnboost/pending/integer_log2.hpp>
+
+namespace ndnboost {
+namespace random {
+namespace detail {
+
+#if !defined(NDNBOOST_NO_CXX11_CONSTEXPR)
+#define NDNBOOST_RANDOM_DETAIL_CONSTEXPR constexpr
+#elif defined(NDNBOOST_MSVC)
+#define NDNBOOST_RANDOM_DETAIL_CONSTEXPR __forceinline
+#elif defined(__GNUC__) && __GNUC__ >= 4
+#define NDNBOOST_RANDOM_DETAIL_CONSTEXPR inline __attribute__((const)) __attribute__((always_inline))
+#else
+#define NDNBOOST_RANDOM_DETAIL_CONSTEXPR inline
+#endif
+
+template<int Shift>
+struct integer_log2_impl
+{
+#if defined(NDNBOOST_NO_CXX11_CONSTEXPR)
+ template<class T>
+ NDNBOOST_RANDOM_DETAIL_CONSTEXPR static int apply(T t, int accum)
+ {
+ int update = ((t >> Shift) != 0) * Shift;
+ return integer_log2_impl<Shift / 2>::apply(t >> update, accum + update);
+ }
+#else
+ template<class T>
+ NDNBOOST_RANDOM_DETAIL_CONSTEXPR static int apply2(T t, int accum, int update)
+ {
+ return integer_log2_impl<Shift / 2>::apply(t >> update, accum + update);
+ }
+
+ template<class T>
+ NDNBOOST_RANDOM_DETAIL_CONSTEXPR static int apply(T t, int accum)
+ {
+ return apply2(t, accum, ((t >> Shift) != 0) * Shift);
+ }
+#endif
+};
+
+template<>
+struct integer_log2_impl<1>
+{
+ template<class T>
+ NDNBOOST_RANDOM_DETAIL_CONSTEXPR static int apply(T t, int accum)
+ {
+ return int(t >> 1) + accum;
+ }
+};
+
+template<class T>
+NDNBOOST_RANDOM_DETAIL_CONSTEXPR int integer_log2(T t)
+{
+ return integer_log2_impl<
+ ::ndnboost::detail::max_pow2_less<
+ ::std::numeric_limits<T>::digits, 4
+ >::value
+ >::apply(t, 0);
+}
+
+} // namespace detail
+} // namespace random
+} // namespace ndnboost
+
+#endif // NDNBOOST_RANDOM_DETAIL_INTEGER_LOG2_HPP