Added boost header

test/external/boost/random/random_number_generator.hpp

@@ -0,0 +1,73 @@
+/* boost random/random_number_generator.hpp header file
+ *
+ * Copyright Jens Maurer 2000-2001
+ * 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: random_number_generator.hpp 71018 2011-04-05 21:27:52Z steven_watanabe $
+ *
+ * Revision history
+ *  2001-02-18  moved to individual header files
+ */
+
+#ifndef BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP
+#define BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP
+
+#include <boost/assert.hpp>
+#include <boost/random/uniform_int_distribution.hpp>
+
+#include <boost/random/detail/disable_warnings.hpp>
+
+namespace boost {
+namespace random {
+
+/**
+ * Instantiations of class template random_number_generator model a
+ * RandomNumberGenerator (std:25.2.11 [lib.alg.random.shuffle]). On
+ * each invocation, it returns a uniformly distributed integer in
+ * the range [0..n).
+ *
+ * The template parameter IntType shall denote some integer-like value type.
+ */
+template<class URNG, class IntType = long>
+class random_number_generator
+{
+public:
+    typedef URNG base_type;
+    typedef IntType argument_type;
+    typedef IntType result_type;
+    /**
+     * Constructs a random_number_generator functor with the given
+     * \uniform_random_number_generator as the underlying source of
+     * random numbers.
+     */
+    random_number_generator(base_type& rng) : _rng(rng) {}
+
+    // compiler-generated copy ctor is fine
+    // assignment is disallowed because there is a reference member
+
+    /**
+     * Returns a value in the range [0, n)
+     */
+    result_type operator()(argument_type n)
+    {
+        BOOST_ASSERT(n > 0);
+        return uniform_int_distribution<IntType>(0, n-1)(_rng);
+    }
+
+private:
+    base_type& _rng;
+};
+
+} // namespace random
+
+using random::random_number_generator;
+
+} // namespace boost
+
+#include <boost/random/detail/enable_warnings.hpp>
+
+#endif // BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP