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Diffstat (limited to 'contrib/libc++/include/numeric')
| -rw-r--r-- | contrib/libc++/include/numeric | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/contrib/libc++/include/numeric b/contrib/libc++/include/numeric new file mode 100644 index 0000000000000..e00580854d413 --- /dev/null +++ b/contrib/libc++/include/numeric @@ -0,0 +1,263 @@ +// -*- C++ -*- +//===---------------------------- numeric ---------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP_NUMERIC +#define _LIBCPP_NUMERIC + +/* + numeric synopsis + +namespace std +{ + +template <class InputIterator, class T> + T + accumulate(InputIterator first, InputIterator last, T init); + +template <class InputIterator, class T, class BinaryOperation> + T + accumulate(InputIterator first, InputIterator last, T init, BinaryOperation binary_op); + +template <class InputIterator1, class InputIterator2, class T> + T + inner_product(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, T init); + +template <class InputIterator1, class InputIterator2, class T, class BinaryOperation1, class BinaryOperation2> + T + inner_product(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, + T init, BinaryOperation1 binary_op1, BinaryOperation2 binary_op2); + +template <class InputIterator, class OutputIterator> + OutputIterator + partial_sum(InputIterator first, InputIterator last, OutputIterator result); + +template <class InputIterator, class OutputIterator, class BinaryOperation> + OutputIterator + partial_sum(InputIterator first, InputIterator last, OutputIterator result, BinaryOperation binary_op); + +template <class InputIterator, class OutputIterator> + OutputIterator + adjacent_difference(InputIterator first, InputIterator last, OutputIterator result); + +template <class InputIterator, class OutputIterator, class BinaryOperation> + OutputIterator + adjacent_difference(InputIterator first, InputIterator last, OutputIterator result, BinaryOperation binary_op); + +template <class ForwardIterator, class T> + void iota(ForwardIterator first, ForwardIterator last, T value); + +template <class M, class N> + constexpr common_type_t<M,N> gcd(M m, N n); // C++17 + +template <class M, class N> + constexpr common_type_t<M,N> lcm(M m, N n); // C++17 + +} // std + +*/ + +#include <__config> +#include <iterator> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_BEGIN_NAMESPACE_STD + +template <class _InputIterator, class _Tp> +inline _LIBCPP_INLINE_VISIBILITY +_Tp +accumulate(_InputIterator __first, _InputIterator __last, _Tp __init) +{ + for (; __first != __last; ++__first) + __init = __init + *__first; + return __init; +} + +template <class _InputIterator, class _Tp, class _BinaryOperation> +inline _LIBCPP_INLINE_VISIBILITY +_Tp +accumulate(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOperation __binary_op) +{ + for (; __first != __last; ++__first) + __init = __binary_op(__init, *__first); + return __init; +} + +template <class _InputIterator1, class _InputIterator2, class _Tp> +inline _LIBCPP_INLINE_VISIBILITY +_Tp +inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init) +{ + for (; __first1 != __last1; ++__first1, (void) ++__first2) + __init = __init + *__first1 * *__first2; + return __init; +} + +template <class _InputIterator1, class _InputIterator2, class _Tp, class _BinaryOperation1, class _BinaryOperation2> +inline _LIBCPP_INLINE_VISIBILITY +_Tp +inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, + _Tp __init, _BinaryOperation1 __binary_op1, _BinaryOperation2 __binary_op2) +{ + for (; __first1 != __last1; ++__first1, (void) ++__first2) + __init = __binary_op1(__init, __binary_op2(*__first1, *__first2)); + return __init; +} + +template <class _InputIterator, class _OutputIterator> +inline _LIBCPP_INLINE_VISIBILITY +_OutputIterator +partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result) +{ + if (__first != __last) + { + typename iterator_traits<_InputIterator>::value_type __t(*__first); + *__result = __t; + for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result) + { + __t = __t + *__first; + *__result = __t; + } + } + return __result; +} + +template <class _InputIterator, class _OutputIterator, class _BinaryOperation> +inline _LIBCPP_INLINE_VISIBILITY +_OutputIterator +partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result, + _BinaryOperation __binary_op) +{ + if (__first != __last) + { + typename iterator_traits<_InputIterator>::value_type __t(*__first); + *__result = __t; + for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result) + { + __t = __binary_op(__t, *__first); + *__result = __t; + } + } + return __result; +} + +template <class _InputIterator, class _OutputIterator> +inline _LIBCPP_INLINE_VISIBILITY +_OutputIterator +adjacent_difference(_InputIterator __first, _InputIterator __last, _OutputIterator __result) +{ + if (__first != __last) + { + typename iterator_traits<_InputIterator>::value_type __t1(*__first); + *__result = __t1; + for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result) + { + typename iterator_traits<_InputIterator>::value_type __t2(*__first); + *__result = __t2 - __t1; + __t1 = _VSTD::move(__t2); + } + } + return __result; +} + +template <class _InputIterator, class _OutputIterator, class _BinaryOperation> +inline _LIBCPP_INLINE_VISIBILITY +_OutputIterator +adjacent_difference(_InputIterator __first, _InputIterator __last, _OutputIterator __result, + _BinaryOperation __binary_op) +{ + if (__first != __last) + { + typename iterator_traits<_InputIterator>::value_type __t1(*__first); + *__result = __t1; + for (++__first, (void) ++__result; __first != __last; ++__first, (void) ++__result) + { + typename iterator_traits<_InputIterator>::value_type __t2(*__first); + *__result = __binary_op(__t2, __t1); + __t1 = _VSTD::move(__t2); + } + } + return __result; +} + +template <class _ForwardIterator, class _Tp> +inline _LIBCPP_INLINE_VISIBILITY +void +iota(_ForwardIterator __first, _ForwardIterator __last, _Tp __value_) +{ + for (; __first != __last; ++__first, (void) ++__value_) + *__first = __value_; +} + + +#if _LIBCPP_STD_VER > 14 +template <typename _Tp, bool _IsSigned = is_signed<_Tp>::value> struct __abs; + +template <typename _Tp> +struct __abs<_Tp, true> { + _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY + _Tp operator()(_Tp __t) const noexcept { return __t >= 0 ? __t : -__t; } +}; + +template <typename _Tp> +struct __abs<_Tp, false> { + _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY + _Tp operator()(_Tp __t) const noexcept { return __t; } +}; + + +template<class _Tp> +_LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY +_Tp __gcd(_Tp __m, _Tp __n) +{ + static_assert((!is_signed<_Tp>::value), "" ); + return __n == 0 ? __m : __gcd<_Tp>(__n, __m % __n); +} + + +template<class _Tp, class _Up> +_LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY +common_type_t<_Tp,_Up> +gcd(_Tp __m, _Up __n) +{ + static_assert((is_integral<_Tp>::value && is_integral<_Up>::value), "Arguments to gcd must be integer types"); + static_assert((!is_same<typename remove_cv<_Tp>::type, bool>::value), "First argument to gcd cannot be bool" ); + static_assert((!is_same<typename remove_cv<_Up>::type, bool>::value), "Second argument to gcd cannot be bool" ); + using _Rp = common_type_t<_Tp,_Up>; + using _Wp = make_unsigned_t<_Rp>; + return static_cast<_Rp>(__gcd(static_cast<_Wp>(__abs<_Tp>()(__m)), + static_cast<_Wp>(__abs<_Up>()(__n)))); +} + +template<class _Tp, class _Up> +_LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY +common_type_t<_Tp,_Up> +lcm(_Tp __m, _Up __n) +{ + static_assert((is_integral<_Tp>::value && is_integral<_Up>::value), "Arguments to lcm must be integer types"); + static_assert((!is_same<typename remove_cv<_Tp>::type, bool>::value), "First argument to lcm cannot be bool" ); + static_assert((!is_same<typename remove_cv<_Up>::type, bool>::value), "Second argument to lcm cannot be bool" ); + if (__m == 0 || __n == 0) + return 0; + + using _Rp = common_type_t<_Tp,_Up>; + _Rp __val1 = __abs<_Tp>()(__m) / gcd(__m,__n); + _Up __val2 = __abs<_Up>()(__n); + _LIBCPP_ASSERT((numeric_limits<_Rp>::max() / __val1 > __val2), "Overflow in lcm"); + return __val1 * __val2; +} + +#endif /* _LIBCPP_STD_VER > 14 */ + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP_NUMERIC |