--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ossrv_pub/boost_apis/boost/random/normal_distribution.hpp	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,111 @@
+/* boost random/normal_distribution.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: normal_distribution.hpp,v 1.20 2004/07/27 03:43:32 dgregor Exp $
+ *
+ * Revision history
+ *  2001-02-18  moved to individual header files
+ */
+
+#ifndef BOOST_RANDOM_NORMAL_DISTRIBUTION_HPP
+#define BOOST_RANDOM_NORMAL_DISTRIBUTION_HPP
+
+#include <cmath>
+#include <cassert>
+#include <iostream>
+#include <boost/limits.hpp>
+#include <boost/static_assert.hpp>
+
+namespace boost {
+
+// deterministic polar method, uses trigonometric functions
+template<class RealType = double>
+class normal_distribution
+{
+public:
+  typedef RealType input_type;
+  typedef RealType result_type;
+
+#if !defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS) && !(defined(BOOST_MSVC) && BOOST_MSVC <= 1300)
+    BOOST_STATIC_ASSERT(!std::numeric_limits<RealType>::is_integer);
+#endif
+
+  explicit normal_distribution(const result_type& mean = result_type(0),
+                               const result_type& sigma = result_type(1))
+    : _mean(mean), _sigma(sigma), _valid(false)
+  {
+    assert(sigma >= result_type(0));
+  }
+
+  // compiler-generated copy constructor is NOT fine, need to purge cache
+  normal_distribution(const normal_distribution& other)
+    : _mean(other._mean), _sigma(other._sigma), _valid(false)
+  {
+  }
+
+  // compiler-generated copy ctor and assignment operator are fine
+
+  RealType mean() const { return _mean; }
+  RealType sigma() const { return _sigma; }
+
+  void reset() { _valid = false; }
+
+  template<class Engine>
+  result_type operator()(Engine& eng)
+  {
+#ifndef BOOST_NO_STDC_NAMESPACE
+    // allow for Koenig lookup
+    using std::sqrt; using std::log; using std::sin; using std::cos;
+#endif
+    if(!_valid) {
+      _r1 = eng();
+      _r2 = eng();
+      _cached_rho = sqrt(-result_type(2) * log(result_type(1)-_r2));
+      _valid = true;
+    } else {
+      _valid = false;
+    }
+    // Can we have a boost::mathconst please?
+    const result_type pi = result_type(3.14159265358979323846);
+    
+    return _cached_rho * (_valid ?
+                          cos(result_type(2)*pi*_r1) :
+                          sin(result_type(2)*pi*_r1))
+      * _sigma + _mean;
+  }
+
+#if !defined(BOOST_NO_OPERATORS_IN_NAMESPACE) && !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS)
+  template<class CharT, class Traits>
+  friend std::basic_ostream<CharT,Traits>&
+  operator<<(std::basic_ostream<CharT,Traits>& os, const normal_distribution& nd)
+  {
+    os << nd._mean << " " << nd._sigma << " "
+       << nd._valid << " " << nd._cached_rho << " " << nd._r1;
+    return os;
+  }
+
+  template<class CharT, class Traits>
+  friend std::basic_istream<CharT,Traits>&
+  operator>>(std::basic_istream<CharT,Traits>& is, normal_distribution& nd)
+  {
+    is >> std::ws >> nd._mean >> std::ws >> nd._sigma
+       >> std::ws >> nd._valid >> std::ws >> nd._cached_rho
+       >> std::ws >> nd._r1;
+    return is;
+  }
+#endif
+private:
+  result_type _mean, _sigma;
+  result_type _r1, _r2, _cached_rho;
+  bool _valid;
+};
+
+} // namespace boost
+
+#endif // BOOST_RANDOM_NORMAL_DISTRIBUTION_HPP