Started to merge @ZobyTwo cmake branch

thirdparty/Boost/boost/random/binomial_distribution.hpp

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+/* boost random/binomial_distribution.hpp header file
+ *
+ * Copyright Jens Maurer 2002
+ * 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: binomial_distribution.hpp 60755 2010-03-22 00:45:06Z steven_watanabe $
+ *
+ */
+
+#ifndef BOOST_RANDOM_BINOMIAL_DISTRIBUTION_HPP
+#define BOOST_RANDOM_BINOMIAL_DISTRIBUTION_HPP
+
+#include <boost/config/no_tr1/cmath.hpp>
+#include <cassert>
+#include <boost/random/detail/config.hpp>
+#include <boost/random/bernoulli_distribution.hpp>
+
+namespace boost {
+
+/**
+ * The binomial distribution is an integer valued distribution with
+ * two parameters, @c t and @c p.  The values of the distribution
+ * are within the range [0,t].
+ *
+ * The probability that the distribution produces a value k is
+ * \f${t \choose k}p^k(1-p)^{t-k}\f$.
+ */
+template<class IntType = int, class RealType = double>
+class binomial_distribution
+{
+public:
+  typedef typename bernoulli_distribution<RealType>::input_type input_type;
+  typedef IntType result_type;
+
+  /**
+   * Construct an @c binomial_distribution object. @c t and @c p
+   * are the parameters of the distribution.
+   *
+   * Requires: t >=0 && 0 <= p <= 1
+   */
+  explicit binomial_distribution(IntType t = 1,
+                                 const RealType& p = RealType(0.5))
+    : _bernoulli(p), _t(t)
+  {
+    assert(_t >= 0);
+    assert(RealType(0) <= p && p <= RealType(1));
+  }
+
+  // compiler-generated copy ctor and assignment operator are fine
+
+  /** Returns: the @c t parameter of the distribution */
+  IntType t() const { return _t; }
+  /** Returns: the @c p parameter of the distribution */
+  RealType p() const { return _bernoulli.p(); }
+  /**
+   * Effects: Subsequent uses of the distribution do not depend
+   * on values produced by any engine prior to invoking reset.
+   */
+  void reset() { }
+
+  /**
+   * Returns: a random variate distributed according to the
+   * binomial distribution.
+   */
+  template<class Engine>
+  result_type operator()(Engine& eng)
+  {
+    // TODO: This is O(_t), but it should be O(log(_t)) for large _t
+    result_type n = 0;
+    for(IntType i = 0; i < _t; ++i)
+      if(_bernoulli(eng))
+        ++n;
+    return n;
+  }
+
+#ifndef BOOST_RANDOM_NO_STREAM_OPERATORS
+  /**
+   * Writes the parameters of the distribution to a @c std::ostream.
+   */
+  template<class CharT, class Traits>
+  friend std::basic_ostream<CharT,Traits>&
+  operator<<(std::basic_ostream<CharT,Traits>& os, const binomial_distribution& bd)
+  {
+    os << bd._bernoulli << " " << bd._t;
+    return os;
+  }
+
+  /**
+   * Reads the parameters of the distribution from a @c std::istream.
+   */
+  template<class CharT, class Traits>
+  friend std::basic_istream<CharT,Traits>&
+  operator>>(std::basic_istream<CharT,Traits>& is, binomial_distribution& bd)
+  {
+    is >> std::ws >> bd._bernoulli >> std::ws >> bd._t;
+    return is;
+  }
+#endif
+
+private:
+  bernoulli_distribution<RealType> _bernoulli;
+  IntType _t;
+};
+
+} // namespace boost
+
+#endif // BOOST_RANDOM_BINOMIAL_DISTRIBUTION_HPP