===================================================================
@@ -2728,42 +2728,8 @@
template<typename _UniformRandomNumberGenerator>
result_type
operator()(_UniformRandomNumberGenerator& __urng,
- const param_type& __p)
- {
- const result_type __pi
- = __gnu_cxx::__math_constants<result_type>::__pi;
- std::__detail::_Adaptor<_UniformRandomNumberGenerator, result_type>
- __aurng(__urng);
+ const param_type& __p);
- result_type __f;
- while (1)
- {
- result_type __rnd = std::cos(__pi * __aurng());
- __f = (result_type(1) + __p._M_r * __rnd) / (__p._M_r + __rnd);
- result_type __c = __p._M_kappa * (__p._M_r - __f);
-
- result_type __rnd2 = __aurng();
- if (__c * (result_type(2) - __c) > __rnd2)
- break;
- if (std::log(__c / __rnd2) >= __c - result_type(1))
- break;
- }
-
- result_type __res = std::acos(__f);
-#if _GLIBCXX_USE_C99_MATH_TR1
- __res = std::copysign(__res, __aurng() - result_type(0.5));
-#else
- if (__aurng() < result_type(0.5))
- __res = -__res;
-#endif
- __res += __p._M_mu;
- if (__res > __pi)
- __res -= result_type(2) * __pi;
- else if (__res < -__pi)
- __res += result_type(2) * __pi;
- return __res;
- }
-
template<typename _ForwardIterator,
typename _UniformRandomNumberGenerator>
void
@@ -3106,6 +3072,227 @@
const __gnu_cxx::hypergeometric_distribution<_UIntType>& __d2)
{ return !(__d1 == __d2); }
+ /**
+ * @brief A logistic continuous distribution for random numbers.
+ *
+ * The formula for the logistic probability density function is
+ * @f[
+ * p(x|\a,\b) = \frac{e^{(x - a)/b}}{b[1 + e^{(x - a)/b}]^2}
+ * @f]
+ * where @f$b > 0@f$.
+ *
+ * The formula for the logistic probability function is
+ * @f[
+ * cdf(x|\a,\b) = \frac{e^{(x - a)/b}}{1 + e^{(x - a)/b}}
+ * @f]
+ * where @f$b > 0@f$.
+ *
+ * <table border=1 cellpadding=10 cellspacing=0>
+ * <caption align=top>Distribution Statistics</caption>
+ * <tr><td>Mean</td><td>@f$a@f$</td></tr>
+ * <tr><td>Variance</td><td>@f$b^2\pi^2/3@f$</td></tr>
+ * <tr><td>Range</td><td>@f$[0, \infty)@f$</td></tr>
+ * </table>
+ */
+ template<typename _RealType = double>
+ class
+ logistic_distribution
+ {
+ static_assert(std::is_floating_point<_RealType>::value,
+ "template argument not a floating point type");
+
+ public:
+ /** The type of the range of the distribution. */
+ typedef _RealType result_type;
+ /** Parameter type. */
+ struct param_type
+ {
+ typedef logistic_distribution<result_type> distribution_type;
+
+ param_type(result_type __a = result_type(0),
+ result_type __b = result_type(1))
+ : _M_a(__a), _M_b(__b)
+ {
+ _GLIBCXX_DEBUG_ASSERT(_M_b > result_type(0));
+ }
+
+ result_type
+ a() const
+ { return _M_a; }
+
+ result_type
+ b() const
+ { return _M_b; }
+
+ friend bool
+ operator==(const param_type& __p1, const param_type& __p2)
+ { return __p1._M_a == __p2._M_a
+ && __p1._M_b == __p2._M_b; }
+
+ private:
+ void _M_initialize();
+
+ result_type _M_a;
+ result_type _M_b;
+ };
+
+ /**
+ * @brief Constructors.
+ */
+ explicit
+ logistic_distribution(result_type __a = result_type(0),
+ result_type __b = result_type(1))
+ : _M_param(__a, __b)
+ { }
+
+ explicit
+ logistic_distribution(const param_type& __p)
+ : _M_param(__p)
+ { }
+
+ /**
+ * @brief Resets the distribution state.
+ */
+ void
+ reset()
+ { }
+
+ /**
+ * @brief Return the parameters of the distribution.
+ */
+ result_type
+ a() const
+ { return _M_param.a(); }
+
+ result_type
+ b() const
+ { return _M_param.b(); }
+
+ /**
+ * @brief Returns the parameter set of the distribution.
+ */
+ param_type
+ param() const
+ { return _M_param; }
+
+ /**
+ * @brief Sets the parameter set of the distribution.
+ * @param __param The new parameter set of the distribution.
+ */
+ void
+ param(const param_type& __param)
+ { _M_param = __param; }
+
+ /**
+ * @brief Returns the greatest lower bound value of the distribution.
+ */
+ result_type
+ min() const
+ { return -std::numeric_limits<result_type>::max(); }
+
+ /**
+ * @brief Returns the least upper bound value of the distribution.
+ */
+ result_type
+ max() const
+ { return std::numeric_limits<result_type>::max(); }
+
+ /**
+ * @brief Generating functions.
+ */
+ template<typename _UniformRandomNumberGenerator>
+ result_type
+ operator()(_UniformRandomNumberGenerator& __urng)
+ { return this->operator()(__urng, this->_M_param); }
+
+ template<typename _UniformRandomNumberGenerator>
+ result_type
+ operator()(_UniformRandomNumberGenerator&,
+ const param_type&);
+
+ template<typename _ForwardIterator,
+ typename _UniformRandomNumberGenerator>
+ void
+ __generate(_ForwardIterator __f, _ForwardIterator __t,
+ _UniformRandomNumberGenerator& __urng)
+ { this->__generate(__f, __t, __urng, this->param()); }
+
+ template<typename _ForwardIterator,
+ typename _UniformRandomNumberGenerator>
+ void
+ __generate(_ForwardIterator __f, _ForwardIterator __t,
+ _UniformRandomNumberGenerator& __urng,
+ const param_type& __p)
+ { this->__generate_impl(__f, __t, __urng, __p); }
+
+ template<typename _UniformRandomNumberGenerator>
+ void
+ __generate(result_type* __f, result_type* __t,
+ _UniformRandomNumberGenerator& __urng,
+ const param_type& __p)
+ { this->__generate_impl(__f, __t, __urng, __p); }
+
+ /**
+ * @brief Return true if two logistic distributions have
+ * the same parameters and the sequences that would
+ * be generated are equal.
+ */
+ template<typename _RealType1>
+ friend bool
+ operator==(const logistic_distribution<_RealType1>& __d1,
+ const logistic_distribution<_RealType1>& __d2)
+ { return __d1.param() == __d2.param(); }
+
+ /**
+ * @brief Inserts a %logistic_distribution random number distribution
+ * @p __x into the output stream @p __os.
+ *
+ * @param __os An output stream.
+ * @param __x A %logistic_distribution random number distribution.
+ *
+ * @returns The output stream with the state of @p __x inserted or in
+ * an error state.
+ */
+ template<typename _RealType1, typename _CharT, typename _Traits>
+ friend std::basic_ostream<_CharT, _Traits>&
+ operator<<(std::basic_ostream<_CharT, _Traits>&,
+ const logistic_distribution<_RealType1>&);
+
+ /**
+ * @brief Extracts a %logistic_distribution random number distribution
+ * @p __x from the input stream @p __is.
+ *
+ * @param __is An input stream.
+ * @param __x A %logistic_distribution random number
+ * generator engine.
+ *
+ * @returns The input stream with @p __x extracted or in an error state.
+ */
+ template<typename _RealType1, typename _CharT, typename _Traits>
+ friend std::basic_istream<_CharT, _Traits>&
+ operator>>(std::basic_istream<_CharT, _Traits>&,
+ logistic_distribution<_RealType1>&);
+
+ private:
+ template<typename _ForwardIterator,
+ typename _UniformRandomNumberGenerator>
+ void
+ __generate_impl(_ForwardIterator __f, _ForwardIterator __t,
+ _UniformRandomNumberGenerator& __urng,
+ const param_type& __p);
+
+ param_type _M_param;
+ };
+
+ /**
+ * @brief Return true if two logistic distributions are not equal.
+ */
+ template<typename _RealType1>
+ inline bool
+ operator!=(const logistic_distribution<_RealType1>& __d1,
+ const logistic_distribution<_RealType1>& __d2)
+ { return !(__d1 == __d2); }
+
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace __gnu_cxx
===================================================================
@@ -1248,6 +1248,47 @@
template<typename _RealType>
+ template<typename _UniformRandomNumberGenerator>
+ typename von_mises_distribution<_RealType>::result_type
+ von_mises_distribution<_RealType>::
+ operator()(_UniformRandomNumberGenerator& __urng,
+ const param_type& __p)
+ {
+ const result_type __pi
+ = __gnu_cxx::__math_constants<result_type>::__pi;
+ std::__detail::_Adaptor<_UniformRandomNumberGenerator, result_type>
+ __aurng(__urng);
+
+ result_type __f;
+ while (1)
+ {
+ result_type __rnd = std::cos(__pi * __aurng());
+ __f = (result_type(1) + __p._M_r * __rnd) / (__p._M_r + __rnd);
+ result_type __c = __p._M_kappa * (__p._M_r - __f);
+
+ result_type __rnd2 = __aurng();
+ if (__c * (result_type(2) - __c) > __rnd2)
+ break;
+ if (std::log(__c / __rnd2) >= __c - result_type(1))
+ break;
+ }
+
+ result_type __res = std::acos(__f);
+#if _GLIBCXX_USE_C99_MATH_TR1
+ __res = std::copysign(__res, __aurng() - result_type(0.5));
+#else
+ if (__aurng() < result_type(0.5))
+ __res = -__res;
+#endif
+ __res += __p._M_mu;
+ if (__res > __pi)
+ __res -= result_type(2) * __pi;
+ else if (__res < -__pi)
+ __res += result_type(2) * __pi;
+ return __res;
+ }
+
+ template<typename _RealType>
template<typename _OutputIterator,
typename _UniformRandomNumberGenerator>
void
@@ -1413,6 +1454,91 @@
return __is;
}
+
+ template<typename _RealType>
+ template<typename _UniformRandomNumberGenerator>
+ typename logistic_distribution<_RealType>::result_type
+ logistic_distribution<_RealType>::
+ operator()(_UniformRandomNumberGenerator& __urng,
+ const param_type& __p)
+ {
+ std::__detail::_Adaptor<_UniformRandomNumberGenerator, result_type>
+ __aurng(__urng);
+
+ result_type __arg = result_type(1);
+ while (__arg == result_type(1) || __arg == result_type(0))
+ __arg = __aurng();
+ return __p.a()
+ + __p.b() * std::log(__arg / (result_type(1) - __arg));
+ }
+
+ template<typename _RealType>
+ template<typename _OutputIterator,
+ typename _UniformRandomNumberGenerator>
+ void
+ logistic_distribution<_RealType>::
+ __generate_impl(_OutputIterator __f, _OutputIterator __t,
+ _UniformRandomNumberGenerator& __urng,
+ const param_type& __p)
+ {
+ __glibcxx_function_requires(_OutputIteratorConcept<_OutputIterator>)
+ std::__detail::_Adaptor<_UniformRandomNumberGenerator, result_type>
+ __aurng(__urng);
+
+ while (__f != __t)
+ {
+ result_type __arg = result_type(1);
+ while (__arg == result_type(1) || __arg == result_type(0))
+ __arg = __aurng();
+ *__f++ = __p.a()
+ + __p.b() * std::log(__arg / (result_type(1) - __arg));
+ }
+ }
+
+ template<typename _RealType, typename _CharT, typename _Traits>
+ std::basic_ostream<_CharT, _Traits>&
+ operator<<(std::basic_ostream<_CharT, _Traits>& __os,
+ const logistic_distribution<_RealType>& __x)
+ {
+ typedef std::basic_ostream<_CharT, _Traits> __ostream_type;
+ typedef typename __ostream_type::ios_base __ios_base;
+
+ const typename __ios_base::fmtflags __flags = __os.flags();
+ const _CharT __fill = __os.fill();
+ const std::streamsize __precision = __os.precision();
+ const _CharT __space = __os.widen(' ');
+ __os.flags(__ios_base::scientific | __ios_base::left);
+ __os.fill(__space);
+ __os.precision(std::numeric_limits<_RealType>::max_digits10);
+
+ __os << __x.a() << __space << __x.b();
+
+ __os.flags(__flags);
+ __os.fill(__fill);
+ __os.precision(__precision);
+ return __os;
+ }
+
+ template<typename _RealType, typename _CharT, typename _Traits>
+ std::basic_istream<_CharT, _Traits>&
+ operator>>(std::basic_istream<_CharT, _Traits>& __is,
+ logistic_distribution<_RealType>& __x)
+ {
+ typedef std::basic_istream<_CharT, _Traits> __istream_type;
+ typedef typename __istream_type::ios_base __ios_base;
+
+ const typename __ios_base::fmtflags __flags = __is.flags();
+ __is.flags(__ios_base::dec | __ios_base::skipws);
+
+ _RealType __a, __b;
+ __is >> __a >> __b;
+ __x.param(typename logistic_distribution<_RealType>::
+ param_type(__a, __b));
+
+ __is.flags(__flags);
+ return __is;
+ }
+
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
===================================================================
@@ -0,0 +1,48 @@
+// { dg-options "-std=c++11" }
+// { dg-require-cstdint "" }
+//
+// 2014-07-11 Edward M. Smith-Rowland <3dw4rd@verizon.net>
+//
+// Copyright (C) 2014 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// 26.4.8.3.* Class template logistic_distribution [rand.dist.ext.logistic]
+// 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
+
+#include <ext/random>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+ bool test [[gnu::unused]] = true;
+
+ __gnu_cxx::logistic_distribution<> u(1.5, 3.0);
+ VERIFY( u.a() == 1.5 );
+ VERIFY( u.b() == 3.0 );
+
+ typedef __gnu_cxx::logistic_distribution<>::result_type result_type;
+ VERIFY( u.min() == -std::numeric_limits<result_type>::max() );
+ VERIFY( u.max() == std::numeric_limits<result_type>::max() );
+}
+
+int
+main()
+{
+ test01();
+ return 0;
+}
===================================================================
@@ -0,0 +1,48 @@
+// { dg-options "-std=c++11" }
+// { dg-require-cstdint "" }
+//
+// 2014-07-11 Edward M. Smith-Rowland <3dw4rd@verizon.net>
+//
+// Copyright (C) 2014 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// 26.4.8.3.* Class template logistic_distribution [rand.dist.ext.logistic]
+// 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
+
+#include <ext/random>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+ bool test [[gnu::unused]] = true;
+
+ __gnu_cxx::logistic_distribution<> u;
+ VERIFY( u.a() == 0.0 );
+ VERIFY( u.b() == 1.0 );
+
+ typedef __gnu_cxx::logistic_distribution<>::result_type result_type;
+ VERIFY( u.min() == -std::numeric_limits<result_type>::max() );
+ VERIFY( u.max() == std::numeric_limits<result_type>::max() );
+}
+
+int
+main()
+{
+ test01();
+ return 0;
+}
===================================================================
@@ -0,0 +1,36 @@
+// { dg-do compile }
+// { dg-options "-std=c++11" }
+// { dg-require-cstdint "" }
+//
+// 2014-07-11 Edward M. Smith-Rowland <3dw4rd@verizon.net>
+//
+// Copyright (C) 2014 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// 26.4.8.3.* Class template logistic_distribution [rand.dist.ext.logistic]
+// 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
+
+#include <ext/random>
+
+void
+test01()
+{
+ typedef __gnu_cxx::logistic_distribution<double> test_type;
+
+ typedef test_type::result_type result_type;
+ typedef test_type::param_type param_type;
+}
===================================================================
@@ -0,0 +1,44 @@
+// { dg-options "-std=c++11" }
+// { dg-require-cstdint "" }
+//
+// 2014-07-11 Edward M. Smith-Rowland <3dw4rd@verizon.net>
+//
+// Copyright (C) 2014 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// 26.5.8.4.5 Class template logistic_distribution [rand.dist.ext.logistic]
+
+#include <ext/random>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+ bool test [[gnu::unused]] = true;
+
+ __gnu_cxx::logistic_distribution<double> u(2.0, 3.0), v, w;
+
+ VERIFY( u != v );
+ VERIFY( !(v != w) );
+}
+
+int
+main()
+{
+ test01();
+ return 0;
+}
===================================================================
@@ -0,0 +1,44 @@
+// { dg-options "-std=c++11" }
+// { dg-require-cstdint "" }
+//
+// 2014-07-11 Edward M. Smith-Rowland <3dw4rd@verizon.net>
+//
+// Copyright (C) 2014 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// 26.5.8.4.5 Class template logistic_distribution [rand.dist.ext.logistic]
+
+#include <ext/random>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+ bool test [[gnu::unused]] = true;
+
+ __gnu_cxx::logistic_distribution<double> u(2.0, 3.0), v, w;
+
+ VERIFY( v == w );
+ VERIFY( !(u == v) );
+}
+
+int
+main()
+{
+ test01();
+ return 0;
+}
===================================================================
@@ -0,0 +1,51 @@
+// { dg-options "-std=c++11" }
+// { dg-require-cstdint "" }
+//
+// 2014-07-11 Edward M. Smith-Rowland <3dw4rd@verizon.net>
+//
+// Copyright (C) 2014 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// 26.4.8.3.* Class template logistic_distribution [rand.dist.ext.logistic]
+// 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
+
+#include <ext/random>
+#include <sstream>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+ bool test [[gnu::unused]] = true;
+
+ std::stringstream str;
+ __gnu_cxx::logistic_distribution<double> u(1.5, 3.0), v;
+ std::minstd_rand0 rng;
+
+ u(rng); // advance
+ str << u;
+
+ str >> v;
+ VERIFY( u == v );
+}
+
+int
+main()
+{
+ test01();
+ return 0;
+}