diff options
Diffstat (limited to 'libcxx/include/__algorithm/shuffle.h')
| -rw-r--r-- | libcxx/include/__algorithm/shuffle.h | 127 |
1 files changed, 60 insertions, 67 deletions
diff --git a/libcxx/include/__algorithm/shuffle.h b/libcxx/include/__algorithm/shuffle.h index 6fee88c..c9c56ce 100644 --- a/libcxx/include/__algorithm/shuffle.h +++ b/libcxx/include/__algorithm/shuffle.h @@ -32,8 +32,8 @@ class _LIBCPP_EXPORTED_FROM_ABI __libcpp_debug_randomizer { public: _LIBCPP_HIDE_FROM_ABI __libcpp_debug_randomizer() { __state_ = __seed(); - __inc_ = __state_ + 0xda3e39cb94b95bdbULL; - __inc_ = (__inc_ << 1) | 1; + __inc_ = __state_ + 0xda3e39cb94b95bdbULL; + __inc_ = (__inc_ << 1) | 1; } typedef uint_fast32_t result_type; @@ -42,7 +42,7 @@ public: _LIBCPP_HIDE_FROM_ABI result_type operator()() { uint_fast64_t __oldstate = __state_; - __state_ = __oldstate * 6364136223846793005ULL + __inc_; + __state_ = __oldstate * 6364136223846793005ULL + __inc_; return __oldstate >> 32; } @@ -62,102 +62,95 @@ private: } }; -#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE) \ - || defined(_LIBCPP_BUILDING_LIBRARY) +#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE) || defined(_LIBCPP_BUILDING_LIBRARY) class _LIBCPP_EXPORTED_FROM_ABI __rs_default; _LIBCPP_EXPORTED_FROM_ABI __rs_default __rs_get(); -class _LIBCPP_EXPORTED_FROM_ABI __rs_default -{ - static unsigned __c_; +class _LIBCPP_EXPORTED_FROM_ABI __rs_default { + static unsigned __c_; + + __rs_default(); - __rs_default(); public: - typedef uint_fast32_t result_type; + typedef uint_fast32_t result_type; - static const result_type _Min = 0; - static const result_type _Max = 0xFFFFFFFF; + static const result_type _Min = 0; + static const result_type _Max = 0xFFFFFFFF; - __rs_default(const __rs_default&); - ~__rs_default(); + __rs_default(const __rs_default&); + ~__rs_default(); - result_type operator()(); + result_type operator()(); - static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR result_type min() {return _Min;} - static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR result_type max() {return _Max;} + static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR result_type min() { return _Min; } + static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR result_type max() { return _Max; } - friend _LIBCPP_EXPORTED_FROM_ABI __rs_default __rs_get(); + friend _LIBCPP_EXPORTED_FROM_ABI __rs_default __rs_get(); }; _LIBCPP_EXPORTED_FROM_ABI __rs_default __rs_get(); template <class _RandomAccessIterator> _LIBCPP_HIDE_FROM_ABI _LIBCPP_DEPRECATED_IN_CXX14 void -random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last) -{ - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - typedef uniform_int_distribution<ptrdiff_t> _Dp; - typedef typename _Dp::param_type _Pp; - difference_type __d = __last - __first; - if (__d > 1) - { - _Dp __uid; - __rs_default __g = __rs_get(); - for (--__last, (void) --__d; __first < __last; ++__first, (void) --__d) - { - difference_type __i = __uid(__g, _Pp(0, __d)); - if (__i != difference_type(0)) - swap(*__first, *(__first + __i)); - } +random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last) { + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + typedef uniform_int_distribution<ptrdiff_t> _Dp; + typedef typename _Dp::param_type _Pp; + difference_type __d = __last - __first; + if (__d > 1) { + _Dp __uid; + __rs_default __g = __rs_get(); + for (--__last, (void)--__d; __first < __last; ++__first, (void)--__d) { + difference_type __i = __uid(__g, _Pp(0, __d)); + if (__i != difference_type(0)) + swap(*__first, *(__first + __i)); } + } } template <class _RandomAccessIterator, class _RandomNumberGenerator> _LIBCPP_HIDE_FROM_ABI _LIBCPP_DEPRECATED_IN_CXX14 void -random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last, -#ifndef _LIBCPP_CXX03_LANG +random_shuffle(_RandomAccessIterator __first, + _RandomAccessIterator __last, +# ifndef _LIBCPP_CXX03_LANG _RandomNumberGenerator&& __rand) -#else +# else _RandomNumberGenerator& __rand) -#endif +# endif { - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - difference_type __d = __last - __first; - if (__d > 1) - { - for (--__last; __first < __last; ++__first, (void) --__d) - { - difference_type __i = __rand(__d); - if (__i != difference_type(0)) - swap(*__first, *(__first + __i)); - } + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + difference_type __d = __last - __first; + if (__d > 1) { + for (--__last; __first < __last; ++__first, (void)--__d) { + difference_type __i = __rand(__d); + if (__i != difference_type(0)) + swap(*__first, *(__first + __i)); } + } } #endif template <class _AlgPolicy, class _RandomAccessIterator, class _Sentinel, class _UniformRandomNumberGenerator> -_LIBCPP_HIDE_FROM_ABI _RandomAccessIterator __shuffle( - _RandomAccessIterator __first, _Sentinel __last_sentinel, _UniformRandomNumberGenerator&& __g) { - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - typedef uniform_int_distribution<ptrdiff_t> _Dp; - typedef typename _Dp::param_type _Pp; - - auto __original_last = _IterOps<_AlgPolicy>::next(__first, __last_sentinel); - auto __last = __original_last; - difference_type __d = __last - __first; - if (__d > 1) - { - _Dp __uid; - for (--__last, (void) --__d; __first < __last; ++__first, (void) --__d) - { - difference_type __i = __uid(__g, _Pp(0, __d)); - if (__i != difference_type(0)) - _IterOps<_AlgPolicy>::iter_swap(__first, __first + __i); - } +_LIBCPP_HIDE_FROM_ABI _RandomAccessIterator +__shuffle(_RandomAccessIterator __first, _Sentinel __last_sentinel, _UniformRandomNumberGenerator&& __g) { + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + typedef uniform_int_distribution<ptrdiff_t> _Dp; + typedef typename _Dp::param_type _Pp; + + auto __original_last = _IterOps<_AlgPolicy>::next(__first, __last_sentinel); + auto __last = __original_last; + difference_type __d = __last - __first; + if (__d > 1) { + _Dp __uid; + for (--__last, (void)--__d; __first < __last; ++__first, (void)--__d) { + difference_type __i = __uid(__g, _Pp(0, __d)); + if (__i != difference_type(0)) + _IterOps<_AlgPolicy>::iter_swap(__first, __first + __i); } + } - return __original_last; + return __original_last; } template <class _RandomAccessIterator, class _UniformRandomNumberGenerator> |