Adding boost random support and system libs

2013-01-06 19:44:18 +00:00
parent 38ebdde6ed
commit e2be750780
42 changed files with 6501 additions and 0 deletions
--- a/Boost/boost/random/geometric_distribution.hpp
+++ b/Boost/boost/random/geometric_distribution.hpp
@@ -0,0 +1,118 @@
+/* boost random/geometric_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: geometric_distribution.hpp 60755 2010-03-22 00:45:06Z steven_watanabe $
+ *
+ * Revision history
+ *  2001-02-18  moved to individual header files
+ */
+
+#ifndef BOOST_RANDOM_GEOMETRIC_DISTRIBUTION_HPP
+#define BOOST_RANDOM_GEOMETRIC_DISTRIBUTION_HPP
+
+#include <boost/config/no_tr1/cmath.hpp>          // std::log
+#include <cassert>
+#include <iostream>
+#include <boost/random/detail/config.hpp>
+#include <boost/random/uniform_01.hpp>
+
+namespace boost {
+
+#if defined(__GNUC__) && (__GNUC__ < 3)
+// Special gcc workaround: gcc 2.95.x ignores using-declarations
+// in template classes (confirmed by gcc author Martin v. Loewis)
+  using std::log;
+#endif
+
+/**
+ * An instantiation of the class template @c geometric_distribution models
+ * a \random_distribution.  The distribution produces positive
+ * integers which are the number of bernoulli trials
+ * with probability @c p required to get one that fails.
+ *
+ * For the geometric distribution, \f$p(i) = (1-p) p^{i-1}\f$.
+ */
+template<class IntType = int, class RealType = double>
+class geometric_distribution
+{
+public:
+  typedef RealType input_type;
+  typedef IntType result_type;
+
+  /**
+   * Contructs a new geometric_distribution with the paramter @c p.
+   *
+   * Requires: 0 < p < 1
+   */
+  explicit geometric_distribution(const RealType& p = RealType(0.5))
+    : _p(p)
+  {
+    assert(RealType(0) < _p && _p < RealType(1));
+    init();
+  }
+
+  // compiler-generated copy ctor and assignment operator are fine
+
+  /**
+   * Returns: the distribution parameter @c p
+   */
+  RealType p() const { return _p; }
+  void reset() { }
+
+  template<class Engine>
+  result_type operator()(Engine& eng)
+  {
+#ifndef BOOST_NO_STDC_NAMESPACE
+    using std::log;
+    using std::floor;
+#endif
+    return IntType(floor(log(RealType(1)-eng()) / _log_p)) + IntType(1);
+  }
+
+#ifndef BOOST_RANDOM_NO_STREAM_OPERATORS
+  template<class CharT, class Traits>
+  friend std::basic_ostream<CharT,Traits>&
+  operator<<(std::basic_ostream<CharT,Traits>& os, const geometric_distribution& gd)
+  {
+    os << gd._p;
+    return os;
+  }
+
+  template<class CharT, class Traits>
+  friend std::basic_istream<CharT,Traits>&
+  operator>>(std::basic_istream<CharT,Traits>& is, geometric_distribution& gd)
+  {
+    is >> std::ws >> gd._p;
+    gd.init();
+    return is;
+  }
+#endif
+
+private:
+
+  /// \cond hide_private_functions
+
+  void init()
+  {
+#ifndef BOOST_NO_STDC_NAMESPACE
+    using std::log;
+#endif
+    _log_p = log(_p);
+  }
+
+  /// \endcond
+
+  RealType _p;
+  RealType _log_p;
+};
+
+} // namespace boost
+
+#endif // BOOST_RANDOM_GEOMETRIC_DISTRIBUTION_HPP
+