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random (class normal_distribution<>): Add.

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2006-06-24  Paolo Carlini  <pcarlini@suse.de>

	* include/tr1/random (class normal_distribution<>): Add.
	* include/tr1/random.tcc (normal_distribution<>::operator()): Define.
	
	* include/tr1/random.tcc (struct _Max): Remove, "inline" in the
	only user, mersenne_twister<>::max().

	* include/tr1/random.tcc (struct _Shift): Move...
	* include/tr1/random: ... here.

	* include/tr1/random.tcc (linear_congruential<>::
	linear_congruential(unsigned long), linear_congruential<>::
	linear_congruential(_Gen&), mersenne_twister<>::max())): Move inline...
	* include/tr1/random: ... here.

	* include/tr1/random (exponential_distribution<>::
	exponential_distribution(const result_type&)): Add missing
	_GLIBCXX_DEBUG_ASSERT.

	* testsuite/tr1/5_numerical_facilities/random/
	exponential_distribution/requirements/typedefs.cc: New.
	* testsuite/tr1/5_numerical_facilities/random/
	normal_distribution/requirements/typedefs.cc: Likewise.
	* testsuite/tr1/5_numerical_facilities/random/
	bernoulli_distribution/requirements/typedefs.cc: Likewise.
	* testsuite/tr1/5_numerical_facilities/random/
	geometric_distribution/requirements/typedefs.cc: Likewise.

From-SVN: r114982
This commit is contained in:
Paolo Carlini 2006-06-25 01:23:17 +00:00 committed by Paolo Carlini
parent 762bd0488f
commit 7f09067fef
8 changed files with 338 additions and 49 deletions
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29
libstdc++-v3/ChangeLog
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@ -1,3 +1,32 @@
2006-06-24 Paolo Carlini <pcarlini@suse.de>
* include/tr1/random (class normal_distribution<>): Add.
* include/tr1/random.tcc (normal_distribution<>::operator()): Define.
* include/tr1/random.tcc (struct _Max): Remove, "inline" in the
only user, mersenne_twister<>::max().
* include/tr1/random.tcc (struct _Shift): Move...
* include/tr1/random: ... here.
* include/tr1/random.tcc (linear_congruential<>::
linear_congruential(unsigned long), linear_congruential<>::
linear_congruential(_Gen&), mersenne_twister<>::max())): Move inline...
* include/tr1/random: ... here.
* include/tr1/random (exponential_distribution<>::
exponential_distribution(const result_type&)): Add missing
_GLIBCXX_DEBUG_ASSERT.
* testsuite/tr1/5_numerical_facilities/random/
exponential_distribution/requirements/typedefs.cc: New.
* testsuite/tr1/5_numerical_facilities/random/
normal_distribution/requirements/typedefs.cc: Likewise.
* testsuite/tr1/5_numerical_facilities/random/
bernoulli_distribution/requirements/typedefs.cc: Likewise.
* testsuite/tr1/5_numerical_facilities/random/
geometric_distribution/requirements/typedefs.cc: Likewise.
2006-06-23 Benjamin Kosnik <bkoz@redhat.com>
PR libstdc++/27984

122
libstdc++-v3/include/tr1/random
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@ -124,6 +124,15 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
return __return_value;
}
template<typename _UIntType, int __w, bool =
__w != std::numeric_limits<_UIntType>::digits>
struct _Shift
{ static const _UIntType __value = 0; };
template<typename _UIntType, int __w>
struct _Shift<_UIntType, __w, true>
{ static const _UIntType __value = _UIntType(1) << __w; };
} // namespace std::tr1::_Private
@ -301,7 +310,9 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
*
* @param __s The initial seed value.
*/
explicit linear_congruential(unsigned long __s = 1);
explicit
linear_congruential(unsigned long __x0 = 1)
{ this->seed(__x0); }
/**
* Constructs a %linear_congruential random number generator engine
@ -310,7 +321,8 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
* @param __g The seed generator function.
*/
template<class _Gen>
linear_congruential(_Gen& __g);
linear_congruential(_Gen& __g)
{ this->seed(__g); }
/**
* Reseeds the %linear_congruential random number generator engine
@ -513,7 +525,8 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
{ return 0; };
result_type
max() const;
max() const
{ return _Private::_Shift<_UIntType, __w>::__value - 1; }
result_type
operator()();
@ -1657,7 +1670,10 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
*/
explicit
exponential_distribution(const result_type& __lambda = result_type(1))
: _M_lambda(__lambda) { }
: _M_lambda(__lambda)
{
_GLIBCXX_DEBUG_ASSERT(_M_lambda > 0);
}
/**
* Gets the inverse scale parameter of the distribution.
@ -1714,6 +1730,104 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
result_type _M_lambda;
};
/**
* @brief A normal continuous distribution for random numbers.
*
* The formula for the normal probability mass function is
* @f$ p(x) = \frac{1}{\sigma \sqrt{2 \pi}}
* e^{- \frac{{x - mean}^ {2}}{2 \sigma ^ {2}} } @f$.
*/
template<typename _RealType = double>
class normal_distribution
{
public:
// types
typedef _RealType input_type;
typedef _RealType result_type;
public:
/**
* Constructs a normal distribution with parameters @f$ mean @f$ and
* @f$ \sigma @f$.
*/
explicit
normal_distribution(const result_type& __mean = result_type(0),
const result_type& __sigma = result_type(1))
: _M_mean(__mean), _M_sigma(__sigma), _M_saved_available(false)
{
_GLIBCXX_DEBUG_ASSERT(_M_sigma > 0);
}
/**
* Gets the mean of the distribution.
*/
_RealType
mean() const
{ return _M_mean; }
/**
* Gets the @f$ \sigma @f$ of the distribution.
*/
_RealType
sigma() const
{ return _M_sigma; }
/**
* Resets the distribution.
*/
void
reset()
{ _M_saved_available = false; }
template<class _UniformRandomNumberGenerator>
result_type
operator()(_UniformRandomNumberGenerator& __urng);
/**
* Inserts a %normal_distribution random number distribution
* @p __x into the output stream @p __os.
*
* @param __os An output stream.
* @param __x A %normal_distribution random number distribution.
*
* @returns The output stream with the state of @p __x inserted or in
* an error state.
*/
template<typename _CharT, typename _Traits>
friend std::basic_ostream<_CharT, _Traits>&
operator<<(std::basic_ostream<_CharT, _Traits>& __os,
const normal_distribution& __x)
{
return __os << __x.mean() << " " << __x.sigma()
<< " " << __x._M_saved << " " << __x._M_saved_available;
}
/**
* Extracts a %normal_distribution random number distribution
* @p __u from the input stream @p __is.
*
* @param __is An input stream.
* @param __u A %normal_distribution random number generator engine.
*
* @returns The input stream with @p __u extracted or in an error state.
*/
template<typename _CharT, typename _Traits>
friend std::basic_istream<_CharT, _Traits>&
operator>>(std::basic_istream<_CharT, _Traits>& __is,
normal_distribution& __u)
{
return __is >> __u._M_mean >> __u._M_sigma
>> __u._M_saved >> __u._M_saved_available;
}
private:
result_type _M_mean;
result_type _M_sigma;
result_type _M_saved;
bool _M_saved_available;
};
/* @} */ // group tr1_random_distributions_continuous
/* @} */ // group tr1_random_distributions
/* @} */ // group tr1_random

86
libstdc++-v3/include/tr1/random.tcc
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@ -27,8 +27,6 @@
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
#include <limits>
namespace std
{
_GLIBCXX_BEGIN_NAMESPACE(tr1)
@ -96,40 +94,9 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
__mod(_Tp __x)
{ return _Mod<_Tp, __a, __c, __m, __m == 0>::__calc(__x); }
template<typename _UIntType, int __w, bool =
__w != std::numeric_limits<_UIntType>::digits>
struct _Shift
{ static const _UIntType __value = 0; };
template<typename _UIntType, int __w>
struct _Shift<_UIntType, __w, true>
{ static const _UIntType __value = _UIntType(1) << __w; };
// The maximum value that will fit in @p __w bits of @p _UIntType.
template<typename _UIntType, int __w>
struct _Max
{ static const _UIntType __value = _Shift<_UIntType, __w>::__value - 1; };
} // namespace _Private
/**
* Constructs the LCR engine with integral seed @p __x0.
*/
template<class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>
linear_congruential<_UIntType, __a, __c, __m>::
linear_congruential(unsigned long __x0)
{ this->seed(__x0); }
/**
* Constructs the LCR engine with seed generated from @p __g.
*/
template<class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>
template<class _Gen>
linear_congruential<_UIntType, __a, __c, __m>::
linear_congruential(_Gen& __g)
{ this->seed(__g); }
/**
* Seeds the LCR with integral value @p __x0, adjusted so that the
* ring identity is never a member of the convergence set.
@ -239,17 +206,6 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
_M_p = state_size;
}
template<class _UIntType, int __w, int __n, int __m, int __r,
_UIntType __a, int __u, int __s,
_UIntType __b, int __t, _UIntType __c, int __l>
typename
mersenne_twister<_UIntType, __w, __n, __m, __r, __a, __u, __s,
__b, __t, __c, __l>::result_type
mersenne_twister<_UIntType, __w, __n, __m, __r, __a, __u, __s,
__b, __t, __c, __l>::
max() const
{ return _Private::_Max<_UIntType, __w>::__value; }
template<class _UIntType, int __w, int __n, int __m, int __r,
_UIntType __a, int __u, int __s,
_UIntType __b, int __t, _UIntType __c, int __l>
@ -396,5 +352,47 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
return _M_b();
}
/**
* Classic Box-Muller method.
*
* Reference:
* Box, G. E. P. and Muller, M. E. "A Note on the Generation of
* Random Normal Deviates." Ann. Math. Stat. 29, 610-611, 1958.
*/
template<typename _RealType>
template<class _UniformRandomNumberGenerator>
typename normal_distribution<_RealType>::result_type
normal_distribution<_RealType>::
operator()(_UniformRandomNumberGenerator& __urng)
{
result_type __ret;
if (_M_saved_available)
{
_M_saved_available = false;
__ret = _M_saved;
}
else
{
result_type __x, __y, __r2;
do
{
__x = result_type(2.0) * __urng() - result_type(1.0);
__y = result_type(2.0) * __urng() - result_type(1.0);
__r2 = __x * __x + __y * __y;
}
while (__r2 > result_type(1.0) || __r2 == result_type(0));
const result_type __mult = std::sqrt(-result_type(2.0)
* std::log(__r2) / __r2);
_M_saved = __x * __mult;
_M_saved_available = true;
__ret = __y * __mult;
}
return __ret * _M_sigma + _M_mean;
}
_GLIBCXX_END_NAMESPACE
}

37
libstdc++-v3/testsuite/tr1/5_numerical_facilities/random/bernoulli_distribution/requirements/typedefs.cc Normal file
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@ -0,0 +1,37 @@
// { dg-do compile }
//
// 2006-06-24 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2006 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 2, 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 COPYING. If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
// 5.1.7.2 Class template bernoulli_distribution [tr.rand.dist.bern]
// 5.1.1 [7] Table 17
#include <tr1/random>
void
test01()
{
using namespace std::tr1;
typedef bernoulli_distribution test_type;
typedef test_type::input_type input_type;
typedef test_type::result_type result_type;
}

37
libstdc++-v3/testsuite/tr1/5_numerical_facilities/random/exponential_distribution/requirements/typedefs.cc Normal file
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@ -0,0 +1,37 @@
// { dg-do compile }
//
// 2006-06-24 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2006 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 2, 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 COPYING. If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
// 5.1.7.7 Class template exponential_distribution [tr.rand.dist.exp]
// 5.1.1 [7] Table 17
#include <tr1/random>
void
test01()
{
using namespace std::tr1;
typedef exponential_distribution<double> test_type;
typedef test_type::input_type input_type;
typedef test_type::result_type result_type;
}

37
libstdc++-v3/testsuite/tr1/5_numerical_facilities/random/geometric_distribution/requirements/typedefs.cc Normal file
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@ -0,0 +1,37 @@
// { dg-do compile }
//
// 2006-06-24 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2006 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 2, 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 COPYING. If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
// 5.1.7.3 Class template geometric_distribution [tr.rand.dist.geom]
// 5.1.1 [7] Table 17
#include <tr1/random>
void
test01()
{
using namespace std::tr1;
typedef geometric_distribution<int, double> test_type;
typedef test_type::input_type input_type;
typedef test_type::result_type result_type;
}

37
libstdc++-v3/testsuite/tr1/5_numerical_facilities/random/normal_distribution/requirements/typedefs.cc Normal file
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@ -0,0 +1,37 @@
// { dg-do compile }
//
// 2006-06-24 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2006 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 2, 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 COPYING. If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
// 5.1.7.8 Class template normal_distribution [tr.rand.dist.norm]
// 5.1.1 [7] Table 17
#include <tr1/random>
void
test01()
{
using namespace std::tr1;
typedef normal_distribution<double> test_type;
typedef test_type::input_type input_type;
typedef test_type::result_type result_type;
}

2
libstdc++-v3/testsuite/tr1/5_numerical_facilities/random/uniform_real/requirements/typedefs.cc
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@ -20,7 +20,7 @@
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
// 5.1.7.6 Class template uniform_int [tr.rand.dist.runif]
// 5.1.7.6 Class template uniform_real [tr.rand.dist.runif]
// 5.1.1 [7] Table 17
#include <tr1/random>