diff options
Diffstat (limited to 'libcxx/include/__random/lognormal_distribution.h')
-rw-r--r-- | libcxx/include/__random/lognormal_distribution.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/libcxx/include/__random/lognormal_distribution.h b/libcxx/include/__random/lognormal_distribution.h index 752861c3de0c..8fadb5a1e66a 100644 --- a/libcxx/include/__random/lognormal_distribution.h +++ b/libcxx/include/__random/lognormal_distribution.h @@ -24,6 +24,8 @@ _LIBCPP_PUSH_MACROS _LIBCPP_BEGIN_NAMESPACE_STD +#ifdef _LIBCPP_ABI_OLD_LOGNORMAL_DISTRIBUTION + template<class _RealType = double> class _LIBCPP_TEMPLATE_VIS lognormal_distribution { @@ -156,6 +158,140 @@ operator>>(basic_istream<_CharT, _Traits>& __is, return __is >> __x.__p_.__nd_; } +#else // _LIBCPP_ABI_OLD_LOGNORMAL_DISTRIBUTION + +template<class _RealType = double> +class _LIBCPP_TEMPLATE_VIS lognormal_distribution +{ +public: + // types + typedef _RealType result_type; + + class _LIBCPP_TEMPLATE_VIS param_type + { + result_type __m_; + result_type __s_; + public: + typedef lognormal_distribution distribution_type; + + _LIBCPP_INLINE_VISIBILITY + explicit param_type(result_type __m = 0, result_type __s = 1) + : __m_(__m), __s_(__s) {} + + _LIBCPP_INLINE_VISIBILITY + result_type m() const {return __m_;} + _LIBCPP_INLINE_VISIBILITY + result_type s() const {return __s_;} + + friend _LIBCPP_INLINE_VISIBILITY + bool operator==(const param_type& __x, const param_type& __y) + {return __x.__m_ == __y.__m_ && __x.__s_ == __y.__s_;} + friend _LIBCPP_INLINE_VISIBILITY + bool operator!=(const param_type& __x, const param_type& __y) + {return !(__x == __y);} + }; + +private: + normal_distribution<result_type> __nd_; + +public: + // constructor and reset functions +#ifndef _LIBCPP_CXX03_LANG + _LIBCPP_INLINE_VISIBILITY + lognormal_distribution() : lognormal_distribution(0) {} + _LIBCPP_INLINE_VISIBILITY + explicit lognormal_distribution(result_type __m, result_type __s = 1) + : __nd_(__m, __s) {} +#else + _LIBCPP_INLINE_VISIBILITY + explicit lognormal_distribution(result_type __m = 0, + result_type __s = 1) + : __nd_(__m, __s) {} +#endif + _LIBCPP_INLINE_VISIBILITY + explicit lognormal_distribution(const param_type& __p) + : __nd_(__p.m(), __p.s()) {} + _LIBCPP_INLINE_VISIBILITY + void reset() {__nd_.reset();} + + // generating functions + template<class _URNG> + _LIBCPP_INLINE_VISIBILITY + result_type operator()(_URNG& __g) + { + return _VSTD::exp(__nd_(__g)); + } + + template<class _URNG> + _LIBCPP_INLINE_VISIBILITY + result_type operator()(_URNG& __g, const param_type& __p) + { + typename normal_distribution<result_type>::param_type __pn(__p.m(), __p.s()); + return _VSTD::exp(__nd_(__g, __pn)); + } + + // property functions + _LIBCPP_INLINE_VISIBILITY + result_type m() const {return __nd_.mean();} + _LIBCPP_INLINE_VISIBILITY + result_type s() const {return __nd_.stddev();} + + _LIBCPP_INLINE_VISIBILITY + param_type param() const {return param_type(__nd_.mean(), __nd_.stddev());} + _LIBCPP_INLINE_VISIBILITY + void param(const param_type& __p) + { + typename normal_distribution<result_type>::param_type __pn(__p.m(), __p.s()); + __nd_.param(__pn); + } + + _LIBCPP_INLINE_VISIBILITY + result_type min() const {return 0;} + _LIBCPP_INLINE_VISIBILITY + result_type max() const {return numeric_limits<result_type>::infinity();} + + friend _LIBCPP_INLINE_VISIBILITY + bool operator==(const lognormal_distribution& __x, + const lognormal_distribution& __y) + {return __x.__nd_ == __y.__nd_;} + friend _LIBCPP_INLINE_VISIBILITY + bool operator!=(const lognormal_distribution& __x, + const lognormal_distribution& __y) + {return !(__x == __y);} + + template <class _CharT, class _Traits, class _RT> + friend + basic_ostream<_CharT, _Traits>& + operator<<(basic_ostream<_CharT, _Traits>& __os, + const lognormal_distribution<_RT>& __x); + + template <class _CharT, class _Traits, class _RT> + friend + basic_istream<_CharT, _Traits>& + operator>>(basic_istream<_CharT, _Traits>& __is, + lognormal_distribution<_RT>& __x); +}; + +template <class _CharT, class _Traits, class _RT> +inline _LIBCPP_INLINE_VISIBILITY +basic_ostream<_CharT, _Traits>& +operator<<(basic_ostream<_CharT, _Traits>& __os, + const lognormal_distribution<_RT>& __x) +{ + return __os << __x.__nd_; +} + +template <class _CharT, class _Traits, class _RT> +inline _LIBCPP_INLINE_VISIBILITY +basic_istream<_CharT, _Traits>& +operator>>(basic_istream<_CharT, _Traits>& __is, + lognormal_distribution<_RT>& __x) +{ + return __is >> __x.__nd_; +} + +#endif // _LIBCPP_ABI_OLD_LOGNORMAL_DISTRIBUTION + _LIBCPP_END_NAMESPACE_STD _LIBCPP_POP_MACROS |