diff --git a/libcxx/include/CMakeLists.txt b/libcxx/include/CMakeLists.txt --- a/libcxx/include/CMakeLists.txt +++ b/libcxx/include/CMakeLists.txt @@ -1,4 +1,77 @@ set(files + __algorithm/adjacent_find.h + __algorithm/all_of.h + __algorithm/any_of.h + __algorithm/binary_search.h + __algorithm/clamp.h + __algorithm/comp.h + __algorithm/comp_ref_type.h + __algorithm/copy.h + __algorithm/count.h + __algorithm/count_if.h + __algorithm/equal.h + __algorithm/equal_range.h + __algorithm/fill.h + __algorithm/find.h + __algorithm/find_end.h + __algorithm/find_first_of.h + __algorithm/find_if.h + __algorithm/find_if_not.h + __algorithm/for_each.h + __algorithm/for_each_n.h + __algorithm/generate.h + __algorithm/half_positive.h + __algorithm/includes.h + __algorithm/inplace_merge.h + __algorithm/is_heap.h + __algorithm/is_heap_until.h + __algorithm/is_partitioned.h + __algorithm/is_permutation.h + __algorithm/is_sorted.h + __algorithm/lexicographical_compare.h + __algorithm/lower_bound.h + __algorithm/make_heap.h + __algorithm/max.h + __algorithm/max_element.h + __algorithm/merge.h + __algorithm/min.h + __algorithm/min_element.h + __algorithm/minmax.h + __algorithm/minmax_element.h + __algorithm/mismatch.h + __algorithm/move.h + __algorithm/next_permutation.h + __algorithm/none_of.h + __algorithm/nth_element.h + __algorithm/partial_sort.h + __algorithm/partition.h + __algorithm/partition_point.h + __algorithm/pop_heap.h + __algorithm/prev_permutation.h + __algorithm/push_heap.h + __algorithm/remove.h + __algorithm/replace.h + __algorithm/reverse.h + __algorithm/rotate.h + __algorithm/sample.h + __algorithm/search.h + __algorithm/search_n.h + __algorithm/set_difference.h + __algorithm/set_intersection.h + __algorithm/set_symmetric_difference.h + __algorithm/set_union.h + __algorithm/shift.h + __algorithm/shuffle.h + __algorithm/sift_down.h + __algorithm/sort.h + __algorithm/sort_heap.h + __algorithm/stable_partition.h + __algorithm/stable_sort.h + __algorithm/transform.h + __algorithm/uniform_int_distribution.h + __algorithm/unique.h + __algorithm/unwrap_iter.h + __algorithm/upper_bound.h __availability __bit_reference __bits @@ -10,6 +83,7 @@ __format/format_error.h __format/format_parse_context.h __function_like.h + __functional/search.h __functional_03 __functional_base __functional_base_03 diff --git a/libcxx/include/__algorithm/adjacent_find.h b/libcxx/include/__algorithm/adjacent_find.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/adjacent_find.h @@ -0,0 +1,51 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_ADJACENT_FIND_H +#define _LIBCPP___ALGORITHM_ADJACENT_FIND_H + +#include <__config> +#include <__algorithm/comp.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +adjacent_find(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) { + if (__first != __last) { + _ForwardIterator __i = __first; + while (++__i != __last) { + if (__pred(*__first, *__i)) + return __first; + __first = __i; + } + } + return __last; +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +adjacent_find(_ForwardIterator __first, _ForwardIterator __last) { + typedef typename iterator_traits<_ForwardIterator>::value_type __v; + return _VSTD::adjacent_find(__first, __last, __equal_to<__v>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_ADJACENT_FIND_H diff --git a/libcxx/include/__algorithm/all_of.h b/libcxx/include/__algorithm/all_of.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/all_of.h @@ -0,0 +1,37 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_ALL_OF_H +#define _LIBCPP___ALGORITHM_ALL_OF_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +all_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) { + for (; __first != __last; ++__first) + if (!__pred(*__first)) + return false; + return true; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_ALL_OF_H diff --git a/libcxx/include/__algorithm/any_of.h b/libcxx/include/__algorithm/any_of.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/any_of.h @@ -0,0 +1,37 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_ANY_OF_H +#define _LIBCPP___ALGORITHM_ANY_OF_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +any_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) { + for (; __first != __last; ++__first) + if (__pred(*__first)) + return true; + return false; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_ANY_OF_H diff --git a/libcxx/include/__algorithm/binary_search.h b/libcxx/include/__algorithm/binary_search.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/binary_search.h @@ -0,0 +1,60 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_BINARY_SEARCH_H +#define _LIBCPP___ALGORITHM_BINARY_SEARCH_H + +#include <__config> +#include <__algorithm/lower_bound.h> +#include <__algorithm/comp_ref_type.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +__binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) +{ + __first = _VSTD::__lower_bound<_Compare>(__first, __last, __value_, __comp); + return __first != __last && !__comp(__value_, *__first); +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__binary_search<_Comp_ref>(__first, __last, __value_, __comp); +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) +{ + return _VSTD::binary_search(__first, __last, __value_, + __less::value_type, _Tp>()); +} + + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_BINARY_SEARCH_H diff --git a/libcxx/include/__algorithm/clamp.h b/libcxx/include/__algorithm/clamp.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/clamp.h @@ -0,0 +1,50 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_CLAMP_H +#define _LIBCPP___ALGORITHM_CLAMP_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +#if _LIBCPP_STD_VER > 14 +// clamp +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR +const _Tp& +clamp(const _Tp& __v, const _Tp& __lo, const _Tp& __hi, _Compare __comp) +{ + _LIBCPP_ASSERT(!__comp(__hi, __lo), "Bad bounds passed to std::clamp"); + return __comp(__v, __lo) ? __lo : __comp(__hi, __v) ? __hi : __v; + +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR +const _Tp& +clamp(const _Tp& __v, const _Tp& __lo, const _Tp& __hi) +{ + return _VSTD::clamp(__v, __lo, __hi, __less<_Tp>()); +} +#endif + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_CLAMP_H diff --git a/libcxx/include/__algorithm/comp.h b/libcxx/include/__algorithm/comp.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/comp.h @@ -0,0 +1,97 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_COMP_H +#define _LIBCPP___ALGORITHM_COMP_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// I'd like to replace these with _VSTD::equal_to, but can't because: +// * That only works with C++14 and later, and +// * We haven't included here. +template +struct __equal_to +{ + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 bool operator()(const _T1& __x, const _T2& __y) const {return __x == __y;} + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 bool operator()(const _T2& __x, const _T1& __y) const {return __x == __y;} + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 bool operator()(const _T2& __x, const _T2& __y) const {return __x == __y;} +}; + +template +struct __equal_to<_T1, _T1> +{ + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} +}; + +template +struct __equal_to +{ + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} +}; + +template +struct __equal_to<_T1, const _T1> +{ + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} +}; + +template +struct __less +{ + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} + + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + bool operator()(const _T1& __x, const _T2& __y) const {return __x < __y;} + + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + bool operator()(const _T2& __x, const _T1& __y) const {return __x < __y;} + + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + bool operator()(const _T2& __x, const _T2& __y) const {return __x < __y;} +}; + +template +struct __less<_T1, _T1> +{ + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} +}; + +template +struct __less +{ + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} +}; + +template +struct __less<_T1, const _T1> +{ + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} +}; + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_COMP_H diff --git a/libcxx/include/__algorithm/comp_ref_type.h b/libcxx/include/__algorithm/comp_ref_type.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/comp_ref_type.h @@ -0,0 +1,87 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_COMP_REF_TYPE_H +#define _LIBCPP___ALGORITHM_COMP_REF_TYPE_H + +#include <__config> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +#ifdef _LIBCPP_DEBUG + +template +struct __debug_less +{ + _Compare &__comp_; + _LIBCPP_CONSTEXPR_AFTER_CXX17 + __debug_less(_Compare& __c) : __comp_(__c) {} + + template + _LIBCPP_CONSTEXPR_AFTER_CXX17 + bool operator()(const _Tp& __x, const _Up& __y) + { + bool __r = __comp_(__x, __y); + if (__r) + __do_compare_assert(0, __y, __x); + return __r; + } + + template + _LIBCPP_CONSTEXPR_AFTER_CXX17 + bool operator()(_Tp& __x, _Up& __y) + { + bool __r = __comp_(__x, __y); + if (__r) + __do_compare_assert(0, __y, __x); + return __r; + } + + template + _LIBCPP_CONSTEXPR_AFTER_CXX17 + inline _LIBCPP_INLINE_VISIBILITY + decltype((void)declval<_Compare&>()( + declval<_LHS &>(), declval<_RHS &>())) + __do_compare_assert(int, _LHS & __l, _RHS & __r) { + _LIBCPP_ASSERT(!__comp_(__l, __r), + "Comparator does not induce a strict weak ordering"); + } + + template + _LIBCPP_CONSTEXPR_AFTER_CXX17 + inline _LIBCPP_INLINE_VISIBILITY + void __do_compare_assert(long, _LHS &, _RHS &) {} +}; + +#endif // _LIBCPP_DEBUG + +template +struct __comp_ref_type { + // Pass the comparator by lvalue reference. Or in debug mode, using a + // debugging wrapper that stores a reference. +#ifndef _LIBCPP_DEBUG + typedef typename add_lvalue_reference<_Comp>::type type; +#else + typedef __debug_less<_Comp> type; +#endif +}; + + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_COMP_REF_TYPE_H diff --git a/libcxx/include/__algorithm/copy.h b/libcxx/include/__algorithm/copy.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/copy.h @@ -0,0 +1,198 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_COPY_H +#define _LIBCPP___ALGORITHM_COPY_H + +#include <__config> +#include <__algorithm/unwrap_iter.h> +#include <__iterator/iterator_traits.h> +#include +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// copy + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +__copy_constexpr(_InputIterator __first, _InputIterator __last, _OutputIterator __result) +{ + for (; __first != __last; ++__first, (void) ++__result) + *__result = *__first; + return __result; +} + +template +inline _LIBCPP_INLINE_VISIBILITY +_OutputIterator +__copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) +{ + return _VSTD::__copy_constexpr(__first, __last, __result); +} + +template +inline _LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_same::type, _Up>::value && + is_trivially_copy_assignable<_Up>::value, + _Up* +>::type +__copy(_Tp* __first, _Tp* __last, _Up* __result) +{ + const size_t __n = static_cast(__last - __first); + if (__n > 0) + _VSTD::memmove(__result, __first, __n * sizeof(_Up)); + return __result + __n; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) +{ + if (__libcpp_is_constant_evaluated()) { + return _VSTD::__copy_constexpr(__first, __last, __result); + } else { + return _VSTD::__rewrap_iter(__result, + _VSTD::__copy(_VSTD::__unwrap_iter(__first), + _VSTD::__unwrap_iter(__last), + _VSTD::__unwrap_iter(__result))); + } +} + +// copy_backward + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +__copy_backward_constexpr(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __result) +{ + while (__first != __last) + *--__result = *--__last; + return __result; +} + +template +inline _LIBCPP_INLINE_VISIBILITY +_OutputIterator +__copy_backward(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __result) +{ + return _VSTD::__copy_backward_constexpr(__first, __last, __result); +} + +template +inline _LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_same::type, _Up>::value && + is_trivially_copy_assignable<_Up>::value, + _Up* +>::type +__copy_backward(_Tp* __first, _Tp* __last, _Up* __result) +{ + const size_t __n = static_cast(__last - __first); + if (__n > 0) + { + __result -= __n; + _VSTD::memmove(__result, __first, __n * sizeof(_Up)); + } + return __result; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_BidirectionalIterator2 +copy_backward(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last, + _BidirectionalIterator2 __result) +{ + if (__libcpp_is_constant_evaluated()) { + return _VSTD::__copy_backward_constexpr(__first, __last, __result); + } else { + return _VSTD::__rewrap_iter(__result, + _VSTD::__copy_backward(_VSTD::__unwrap_iter(__first), + _VSTD::__unwrap_iter(__last), + _VSTD::__unwrap_iter(__result))); + } +} + +// copy_if + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +copy_if(_InputIterator __first, _InputIterator __last, + _OutputIterator __result, _Predicate __pred) +{ + for (; __first != __last; ++__first) + { + if (__pred(*__first)) + { + *__result = *__first; + ++__result; + } + } + return __result; +} + +// copy_n + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +typename enable_if +< + __is_cpp17_input_iterator<_InputIterator>::value && + !__is_cpp17_random_access_iterator<_InputIterator>::value, + _OutputIterator +>::type +copy_n(_InputIterator __first, _Size __orig_n, _OutputIterator __result) +{ + typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; + _IntegralSize __n = __orig_n; + if (__n > 0) + { + *__result = *__first; + ++__result; + for (--__n; __n > 0; --__n) + { + ++__first; + *__result = *__first; + ++__result; + } + } + return __result; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +typename enable_if +< + __is_cpp17_random_access_iterator<_InputIterator>::value, + _OutputIterator +>::type +copy_n(_InputIterator __first, _Size __orig_n, _OutputIterator __result) +{ + typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; + _IntegralSize __n = __orig_n; + return _VSTD::copy(__first, __first + __n, __result); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_COPY_H diff --git a/libcxx/include/__algorithm/count.h b/libcxx/include/__algorithm/count.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/count.h @@ -0,0 +1,40 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_COUNT_H +#define _LIBCPP___ALGORITHM_COUNT_H + +#include <__config> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 + typename iterator_traits<_InputIterator>::difference_type + count(_InputIterator __first, _InputIterator __last, const _Tp& __value_) { + typename iterator_traits<_InputIterator>::difference_type __r(0); + for (; __first != __last; ++__first) + if (*__first == __value_) + ++__r; + return __r; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_COUNT_H diff --git a/libcxx/include/__algorithm/count_if.h b/libcxx/include/__algorithm/count_if.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/count_if.h @@ -0,0 +1,40 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_COUNT_IF_H +#define _LIBCPP___ALGORITHM_COUNT_IF_H + +#include <__config> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 + typename iterator_traits<_InputIterator>::difference_type + count_if(_InputIterator __first, _InputIterator __last, _Predicate __pred) { + typename iterator_traits<_InputIterator>::difference_type __r(0); + for (; __first != __last; ++__first) + if (__pred(*__first)) + ++__r; + return __r; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_COUNT_IF_H diff --git a/libcxx/include/__algorithm/equal.h b/libcxx/include/__algorithm/equal.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/equal.h @@ -0,0 +1,90 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_EQUAL_H +#define _LIBCPP___ALGORITHM_EQUAL_H + +#include <__config> +#include <__algorithm/comp.h> +#include <__iterator/iterator_traits.h> +#include // FIXME: replace with <__iterator/distance.h> when it lands + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate __pred) { + for (; __first1 != __last1; ++__first1, (void)++__first2) + if (!__pred(*__first1, *__first2)) + return false; + return true; +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) { + typedef typename iterator_traits<_InputIterator1>::value_type __v1; + typedef typename iterator_traits<_InputIterator2>::value_type __v2; + return _VSTD::equal(__first1, __last1, __first2, __equal_to<__v1, __v2>()); +} + +#if _LIBCPP_STD_VER > 11 +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +__equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, + _BinaryPredicate __pred, input_iterator_tag, input_iterator_tag) { + for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void)++__first2) + if (!__pred(*__first1, *__first2)) + return false; + return __first1 == __last1 && __first2 == __last2; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +__equal(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, _RandomAccessIterator2 __first2, + _RandomAccessIterator2 __last2, _BinaryPredicate __pred, random_access_iterator_tag, + random_access_iterator_tag) { + if (_VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) + return false; + return _VSTD::equal<_RandomAccessIterator1, _RandomAccessIterator2, + typename add_lvalue_reference<_BinaryPredicate>::type>(__first1, __last1, __first2, __pred); +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, + _BinaryPredicate __pred) { + return _VSTD::__equal::type>( + __first1, __last1, __first2, __last2, __pred, typename iterator_traits<_InputIterator1>::iterator_category(), + typename iterator_traits<_InputIterator2>::iterator_category()); +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) { + typedef typename iterator_traits<_InputIterator1>::value_type __v1; + typedef typename iterator_traits<_InputIterator2>::value_type __v2; + return _VSTD::__equal(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>(), + typename iterator_traits<_InputIterator1>::iterator_category(), + typename iterator_traits<_InputIterator2>::iterator_category()); +} +#endif + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_EQUAL_H diff --git a/libcxx/include/__algorithm/equal_range.h b/libcxx/include/__algorithm/equal_range.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/equal_range.h @@ -0,0 +1,86 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_EQUAL_RANGE_H +#define _LIBCPP___ALGORITHM_EQUAL_RANGE_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/half_positive.h> +#include <__algorithm/lower_bound.h> +#include <__algorithm/upper_bound.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 pair<_ForwardIterator, _ForwardIterator> +__equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) +{ + typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; + difference_type __len = _VSTD::distance(__first, __last); + while (__len != 0) + { + difference_type __l2 = _VSTD::__half_positive(__len); + _ForwardIterator __m = __first; + _VSTD::advance(__m, __l2); + if (__comp(*__m, __value_)) + { + __first = ++__m; + __len -= __l2 + 1; + } + else if (__comp(__value_, *__m)) + { + __last = __m; + __len = __l2; + } + else + { + _ForwardIterator __mp1 = __m; + return pair<_ForwardIterator, _ForwardIterator> + ( + _VSTD::__lower_bound<_Compare>(__first, __m, __value_, __comp), + _VSTD::__upper_bound<_Compare>(++__mp1, __last, __value_, __comp) + ); + } + } + return pair<_ForwardIterator, _ForwardIterator>(__first, __first); +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +pair<_ForwardIterator, _ForwardIterator> +equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__equal_range<_Comp_ref>(__first, __last, __value_, __comp); +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +pair<_ForwardIterator, _ForwardIterator> +equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) +{ + return _VSTD::equal_range(__first, __last, __value_, + __less::value_type, _Tp>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_EQUAL_RANGE_H diff --git a/libcxx/include/__algorithm/fill.h b/libcxx/include/__algorithm/fill.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/fill.h @@ -0,0 +1,76 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_FILL_H +#define _LIBCPP___ALGORITHM_FILL_H + +#include <__config> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// fill_n + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +__fill_n(_OutputIterator __first, _Size __n, const _Tp& __value_) +{ + for (; __n > 0; ++__first, (void) --__n) + *__first = __value_; + return __first; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +fill_n(_OutputIterator __first, _Size __n, const _Tp& __value_) +{ + return _VSTD::__fill_n(__first, _VSTD::__convert_to_integral(__n), __value_); +} + +// fill + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +__fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, forward_iterator_tag) +{ + for (; __first != __last; ++__first) + *__first = __value_; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +__fill(_RandomAccessIterator __first, _RandomAccessIterator __last, const _Tp& __value_, random_access_iterator_tag) +{ + _VSTD::fill_n(__first, __last - __first, __value_); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) +{ + _VSTD::__fill(__first, __last, __value_, typename iterator_traits<_ForwardIterator>::iterator_category()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_FILL_H diff --git a/libcxx/include/__algorithm/find.h b/libcxx/include/__algorithm/find.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/find.h @@ -0,0 +1,37 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_FIND_H +#define _LIBCPP___ALGORITHM_FIND_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _InputIterator +find(_InputIterator __first, _InputIterator __last, const _Tp& __value_) { + for (; __first != __last; ++__first) + if (*__first == __value_) + break; + return __first; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_FIND_H diff --git a/libcxx/include/__algorithm/find_end.h b/libcxx/include/__algorithm/find_end.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/find_end.h @@ -0,0 +1,153 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_FIND_END_OF_H +#define _LIBCPP___ALGORITHM_FIND_END_OF_H + +#include <__config> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator1 __find_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, + _ForwardIterator2 __first2, _ForwardIterator2 __last2, + _BinaryPredicate __pred, forward_iterator_tag, + forward_iterator_tag) { + // modeled after search algorithm + _ForwardIterator1 __r = __last1; // __last1 is the "default" answer + if (__first2 == __last2) + return __r; + while (true) { + while (true) { + if (__first1 == __last1) // if source exhausted return last correct answer + return __r; // (or __last1 if never found) + if (__pred(*__first1, *__first2)) + break; + ++__first1; + } + // *__first1 matches *__first2, now match elements after here + _ForwardIterator1 __m1 = __first1; + _ForwardIterator2 __m2 = __first2; + while (true) { + if (++__m2 == __last2) { // Pattern exhaused, record answer and search for another one + __r = __first1; + ++__first1; + break; + } + if (++__m1 == __last1) // Source exhausted, return last answer + return __r; + if (!__pred(*__m1, *__m2)) // mismatch, restart with a new __first + { + ++__first1; + break; + } // else there is a match, check next elements + } + } +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _BidirectionalIterator1 __find_end( + _BidirectionalIterator1 __first1, _BidirectionalIterator1 __last1, _BidirectionalIterator2 __first2, + _BidirectionalIterator2 __last2, _BinaryPredicate __pred, bidirectional_iterator_tag, bidirectional_iterator_tag) { + // modeled after search algorithm (in reverse) + if (__first2 == __last2) + return __last1; // Everything matches an empty sequence + _BidirectionalIterator1 __l1 = __last1; + _BidirectionalIterator2 __l2 = __last2; + --__l2; + while (true) { + // Find last element in sequence 1 that matchs *(__last2-1), with a mininum of loop checks + while (true) { + if (__first1 == __l1) // return __last1 if no element matches *__first2 + return __last1; + if (__pred(*--__l1, *__l2)) + break; + } + // *__l1 matches *__l2, now match elements before here + _BidirectionalIterator1 __m1 = __l1; + _BidirectionalIterator2 __m2 = __l2; + while (true) { + if (__m2 == __first2) // If pattern exhausted, __m1 is the answer (works for 1 element pattern) + return __m1; + if (__m1 == __first1) // Otherwise if source exhaused, pattern not found + return __last1; + if (!__pred(*--__m1, *--__m2)) // if there is a mismatch, restart with a new __l1 + { + break; + } // else there is a match, check next elements + } + } +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 _RandomAccessIterator1 __find_end( + _RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, _RandomAccessIterator2 __first2, + _RandomAccessIterator2 __last2, _BinaryPredicate __pred, random_access_iterator_tag, random_access_iterator_tag) { + // Take advantage of knowing source and pattern lengths. Stop short when source is smaller than pattern + typename iterator_traits<_RandomAccessIterator2>::difference_type __len2 = __last2 - __first2; + if (__len2 == 0) + return __last1; + typename iterator_traits<_RandomAccessIterator1>::difference_type __len1 = __last1 - __first1; + if (__len1 < __len2) + return __last1; + const _RandomAccessIterator1 __s = __first1 + (__len2 - 1); // End of pattern match can't go before here + _RandomAccessIterator1 __l1 = __last1; + _RandomAccessIterator2 __l2 = __last2; + --__l2; + while (true) { + while (true) { + if (__s == __l1) + return __last1; + if (__pred(*--__l1, *__l2)) + break; + } + _RandomAccessIterator1 __m1 = __l1; + _RandomAccessIterator2 __m2 = __l2; + while (true) { + if (__m2 == __first2) + return __m1; + // no need to check range on __m1 because __s guarantees we have enough source + if (!__pred(*--__m1, *--__m2)) { + break; + } + } + } +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator1 +find_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _ForwardIterator2 __last2, + _BinaryPredicate __pred) { + return _VSTD::__find_end::type>( + __first1, __last1, __first2, __last2, __pred, typename iterator_traits<_ForwardIterator1>::iterator_category(), + typename iterator_traits<_ForwardIterator2>::iterator_category()); +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator1 +find_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _ForwardIterator2 __last2) { + typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; + typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; + return _VSTD::find_end(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_FIND_END_OF_H diff --git a/libcxx/include/__algorithm/find_first_of.h b/libcxx/include/__algorithm/find_first_of.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/find_first_of.h @@ -0,0 +1,56 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_FIND_FIRST_OF_H +#define _LIBCPP___ALGORITHM_FIND_FIRST_OF_H + +#include <__config> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 _ForwardIterator1 __find_first_of_ce(_ForwardIterator1 __first1, + _ForwardIterator1 __last1, + _ForwardIterator2 __first2, + _ForwardIterator2 __last2, _BinaryPredicate __pred) { + for (; __first1 != __last1; ++__first1) + for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) + if (__pred(*__first1, *__j)) + return __first1; + return __last1; +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator1 +find_first_of(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, + _ForwardIterator2 __last2, _BinaryPredicate __pred) { + return _VSTD::__find_first_of_ce(__first1, __last1, __first2, __last2, __pred); +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator1 find_first_of( + _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _ForwardIterator2 __last2) { + typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; + typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; + return _VSTD::__find_first_of_ce(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_FIND_FIRST_OF_H diff --git a/libcxx/include/__algorithm/find_if.h b/libcxx/include/__algorithm/find_if.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/find_if.h @@ -0,0 +1,37 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_FIND_IF_H +#define _LIBCPP___ALGORITHM_FIND_IF_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _InputIterator +find_if(_InputIterator __first, _InputIterator __last, _Predicate __pred) { + for (; __first != __last; ++__first) + if (__pred(*__first)) + break; + return __first; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_FIND_IF_H diff --git a/libcxx/include/__algorithm/find_if_not.h b/libcxx/include/__algorithm/find_if_not.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/find_if_not.h @@ -0,0 +1,37 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_FIND_IF_NOT_H +#define _LIBCPP___ALGORITHM_FIND_IF_NOT_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _InputIterator +find_if_not(_InputIterator __first, _InputIterator __last, _Predicate __pred) { + for (; __first != __last; ++__first) + if (!__pred(*__first)) + break; + return __first; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_FIND_IF_NOT_H diff --git a/libcxx/include/__algorithm/for_each.h b/libcxx/include/__algorithm/for_each.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/for_each.h @@ -0,0 +1,37 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_FOR_EACH_H +#define _LIBCPP___ALGORITHM_FOR_EACH_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _Function for_each(_InputIterator __first, + _InputIterator __last, + _Function __f) { + for (; __first != __last; ++__first) + __f(*__first); + return __f; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_FOR_EACH_H diff --git a/libcxx/include/__algorithm/for_each_n.h b/libcxx/include/__algorithm/for_each_n.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/for_each_n.h @@ -0,0 +1,47 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_FOR_EACH_N_H +#define _LIBCPP___ALGORITHM_FOR_EACH_N_H + +#include <__config> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +#if _LIBCPP_STD_VER > 14 + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _InputIterator for_each_n(_InputIterator __first, + _Size __orig_n, + _Function __f) { + typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; + _IntegralSize __n = __orig_n; + while (__n > 0) { + __f(*__first); + ++__first; + --__n; + } + return __first; +} + +#endif + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_FOR_EACH_N_H diff --git a/libcxx/include/__algorithm/generate.h b/libcxx/include/__algorithm/generate.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/generate.h @@ -0,0 +1,51 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_GENERATE_H +#define _LIBCPP___ALGORITHM_GENERATE_H + +#include <__config> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +generate(_ForwardIterator __first, _ForwardIterator __last, _Generator __gen) +{ + for (; __first != __last; ++__first) + *__first = __gen(); +} + +// generate_n + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +generate_n(_OutputIterator __first, _Size __orig_n, _Generator __gen) +{ + typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; + _IntegralSize __n = __orig_n; + for (; __n > 0; ++__first, (void) --__n) + *__first = __gen(); + return __first; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_GENERATE_H diff --git a/libcxx/include/__algorithm/half_positive.h b/libcxx/include/__algorithm/half_positive.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/half_positive.h @@ -0,0 +1,54 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_HALF_POSITIVE_H +#define _LIBCPP___ALGORITHM_HALF_POSITIVE_H + +#include <__config> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// Perform division by two quickly for positive integers (llvm.org/PR39129) + +template +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR +typename enable_if +< + is_integral<_Integral>::value, + _Integral +>::type +__half_positive(_Integral __value) +{ + return static_cast<_Integral>(static_cast::type>(__value) / 2); +} + +template +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR +typename enable_if +< + !is_integral<_Tp>::value, + _Tp +>::type +__half_positive(_Tp __value) +{ + return __value / 2; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_HALF_POSITIVE_H diff --git a/libcxx/include/__algorithm/includes.h b/libcxx/include/__algorithm/includes.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/includes.h @@ -0,0 +1,66 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_INCLUDES_H +#define _LIBCPP___ALGORITHM_INCLUDES_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 bool +__includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, + _Compare __comp) +{ + for (; __first2 != __last2; ++__first1) + { + if (__first1 == __last1 || __comp(*__first2, *__first1)) + return false; + if (!__comp(*__first1, *__first2)) + ++__first2; + } + return true; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, + _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__includes<_Comp_ref>(__first1, __last1, __first2, __last2, __comp); +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) +{ + return _VSTD::includes(__first1, __last1, __first2, __last2, + __less::value_type, + typename iterator_traits<_InputIterator2>::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_INCLUDES_H diff --git a/libcxx/include/__algorithm/inplace_merge.h b/libcxx/include/__algorithm/inplace_merge.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/inplace_merge.h @@ -0,0 +1,228 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_INPLACE_MERGE_H +#define _LIBCPP___ALGORITHM_INPLACE_MERGE_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/rotate.h> +#include <__algorithm/lower_bound.h> +#include <__algorithm/min.h> +#include <__algorithm/upper_bound.h> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +class __invert // invert the sense of a comparison +{ +private: + _Predicate __p_; +public: + _LIBCPP_INLINE_VISIBILITY __invert() {} + + _LIBCPP_INLINE_VISIBILITY + explicit __invert(_Predicate __p) : __p_(__p) {} + + template + _LIBCPP_INLINE_VISIBILITY + bool operator()(const _T1& __x) {return !__p_(__x);} + + template + _LIBCPP_INLINE_VISIBILITY + bool operator()(const _T1& __x, const _T2& __y) {return __p_(__y, __x);} +}; + +template +void __half_inplace_merge(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, + _OutputIterator __result, _Compare __comp) +{ + for (; __first1 != __last1; ++__result) + { + if (__first2 == __last2) + { + _VSTD::move(__first1, __last1, __result); + return; + } + + if (__comp(*__first2, *__first1)) + { + *__result = _VSTD::move(*__first2); + ++__first2; + } + else + { + *__result = _VSTD::move(*__first1); + ++__first1; + } + } + // __first2 through __last2 are already in the right spot. +} + +template +void +__buffered_inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, + _Compare __comp, typename iterator_traits<_BidirectionalIterator>::difference_type __len1, + typename iterator_traits<_BidirectionalIterator>::difference_type __len2, + typename iterator_traits<_BidirectionalIterator>::value_type* __buff) +{ + typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; + __destruct_n __d(0); + unique_ptr __h2(__buff, __d); + if (__len1 <= __len2) + { + value_type* __p = __buff; + for (_BidirectionalIterator __i = __first; __i != __middle; __d.template __incr(), (void) ++__i, (void) ++__p) + ::new ((void*)__p) value_type(_VSTD::move(*__i)); + _VSTD::__half_inplace_merge<_Compare>(__buff, __p, __middle, __last, __first, __comp); + } + else + { + value_type* __p = __buff; + for (_BidirectionalIterator __i = __middle; __i != __last; __d.template __incr(), (void) ++__i, (void) ++__p) + ::new ((void*)__p) value_type(_VSTD::move(*__i)); + typedef reverse_iterator<_BidirectionalIterator> _RBi; + typedef reverse_iterator _Rv; + typedef __invert<_Compare> _Inverted; + _VSTD::__half_inplace_merge<_Inverted>(_Rv(__p), _Rv(__buff), + _RBi(__middle), _RBi(__first), + _RBi(__last), _Inverted(__comp)); + } +} + +template +void +__inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, + _Compare __comp, typename iterator_traits<_BidirectionalIterator>::difference_type __len1, + typename iterator_traits<_BidirectionalIterator>::difference_type __len2, + typename iterator_traits<_BidirectionalIterator>::value_type* __buff, ptrdiff_t __buff_size) +{ + typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; + while (true) + { + // if __middle == __last, we're done + if (__len2 == 0) + return; + if (__len1 <= __buff_size || __len2 <= __buff_size) + return _VSTD::__buffered_inplace_merge<_Compare> + (__first, __middle, __last, __comp, __len1, __len2, __buff); + // shrink [__first, __middle) as much as possible (with no moves), returning if it shrinks to 0 + for (; true; ++__first, (void) --__len1) + { + if (__len1 == 0) + return; + if (__comp(*__middle, *__first)) + break; + } + // __first < __middle < __last + // *__first > *__middle + // partition [__first, __m1) [__m1, __middle) [__middle, __m2) [__m2, __last) such that + // all elements in: + // [__first, __m1) <= [__middle, __m2) + // [__middle, __m2) < [__m1, __middle) + // [__m1, __middle) <= [__m2, __last) + // and __m1 or __m2 is in the middle of its range + _BidirectionalIterator __m1; // "median" of [__first, __middle) + _BidirectionalIterator __m2; // "median" of [__middle, __last) + difference_type __len11; // distance(__first, __m1) + difference_type __len21; // distance(__middle, __m2) + // binary search smaller range + if (__len1 < __len2) + { // __len >= 1, __len2 >= 2 + __len21 = __len2 / 2; + __m2 = __middle; + _VSTD::advance(__m2, __len21); + __m1 = _VSTD::__upper_bound<_Compare>(__first, __middle, *__m2, __comp); + __len11 = _VSTD::distance(__first, __m1); + } + else + { + if (__len1 == 1) + { // __len1 >= __len2 && __len2 > 0, therefore __len2 == 1 + // It is known *__first > *__middle + swap(*__first, *__middle); + return; + } + // __len1 >= 2, __len2 >= 1 + __len11 = __len1 / 2; + __m1 = __first; + _VSTD::advance(__m1, __len11); + __m2 = _VSTD::__lower_bound<_Compare>(__middle, __last, *__m1, __comp); + __len21 = _VSTD::distance(__middle, __m2); + } + difference_type __len12 = __len1 - __len11; // distance(__m1, __middle) + difference_type __len22 = __len2 - __len21; // distance(__m2, __last) + // [__first, __m1) [__m1, __middle) [__middle, __m2) [__m2, __last) + // swap middle two partitions + __middle = _VSTD::rotate(__m1, __middle, __m2); + // __len12 and __len21 now have swapped meanings + // merge smaller range with recursive call and larger with tail recursion elimination + if (__len11 + __len21 < __len12 + __len22) + { + _VSTD::__inplace_merge<_Compare>(__first, __m1, __middle, __comp, __len11, __len21, __buff, __buff_size); +// _VSTD::__inplace_merge<_Compare>(__middle, __m2, __last, __comp, __len12, __len22, __buff, __buff_size); + __first = __middle; + __middle = __m2; + __len1 = __len12; + __len2 = __len22; + } + else + { + _VSTD::__inplace_merge<_Compare>(__middle, __m2, __last, __comp, __len12, __len22, __buff, __buff_size); +// _VSTD::__inplace_merge<_Compare>(__first, __m1, __middle, __comp, __len11, __len21, __buff, __buff_size); + __last = __middle; + __middle = __m1; + __len1 = __len11; + __len2 = __len21; + } + } +} + +template +inline _LIBCPP_INLINE_VISIBILITY +void +inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, + _Compare __comp) +{ + typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; + typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; + difference_type __len1 = _VSTD::distance(__first, __middle); + difference_type __len2 = _VSTD::distance(__middle, __last); + difference_type __buf_size = _VSTD::min(__len1, __len2); + pair __buf = _VSTD::get_temporary_buffer(__buf_size); + unique_ptr __h(__buf.first); + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__inplace_merge<_Comp_ref>(__first, __middle, __last, __comp, __len1, __len2, + __buf.first, __buf.second); +} + +template +inline _LIBCPP_INLINE_VISIBILITY +void +inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last) +{ + _VSTD::inplace_merge(__first, __middle, __last, + __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_INPLACE_MERGE_H diff --git a/libcxx/include/__algorithm/is_heap.h b/libcxx/include/__algorithm/is_heap.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/is_heap.h @@ -0,0 +1,47 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_IS_HEAP_H +#define _LIBCPP___ALGORITHM_IS_HEAP_H + +#include <__config> +#include <__algorithm/is_heap_until.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +is_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + return _VSTD::is_heap_until(__first, __last, __comp) == __last; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +is_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) +{ + return _VSTD::is_heap(__first, __last, __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_IS_HEAP_H diff --git a/libcxx/include/__algorithm/is_heap_until.h b/libcxx/include/__algorithm/is_heap_until.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/is_heap_until.h @@ -0,0 +1,64 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_IS_HEAP_UNTIL_H +#define _LIBCPP___ALGORITHM_IS_HEAP_UNTIL_H + +#include <__config> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _RandomAccessIterator +is_heap_until(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + difference_type __len = __last - __first; + difference_type __p = 0; + difference_type __c = 1; + _RandomAccessIterator __pp = __first; + while (__c < __len) + { + _RandomAccessIterator __cp = __first + __c; + if (__comp(*__pp, *__cp)) + return __cp; + ++__c; + ++__cp; + if (__c == __len) + return __last; + if (__comp(*__pp, *__cp)) + return __cp; + ++__p; + ++__pp; + __c = 2 * __p + 1; + } + return __last; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_RandomAccessIterator +is_heap_until(_RandomAccessIterator __first, _RandomAccessIterator __last) +{ + return _VSTD::is_heap_until(__first, __last, __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_IS_HEAP_UNTIL_H diff --git a/libcxx/include/__algorithm/is_partitioned.h b/libcxx/include/__algorithm/is_partitioned.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/is_partitioned.h @@ -0,0 +1,43 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_IS_PARTITIONED_H +#define _LIBCPP___ALGORITHM_IS_PARTITIONED_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +is_partitioned(_InputIterator __first, _InputIterator __last, _Predicate __pred) +{ + for (; __first != __last; ++__first) + if (!__pred(*__first)) + break; + if ( __first == __last ) + return true; + ++__first; + for (; __first != __last; ++__first) + if (__pred(*__first)) + return false; + return true; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_IS_PARTITIONED_H diff --git a/libcxx/include/__algorithm/is_permutation.h b/libcxx/include/__algorithm/is_permutation.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/is_permutation.h @@ -0,0 +1,167 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_IS_PERMUTATION_H +#define _LIBCPP___ALGORITHM_IS_PERMUTATION_H + +#include <__config> +#include <__iterator/iterator_traits.h> +#include <__iterator/next.h> +#include // FIXME: replace with <__iterator/distance.h> when it lands + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, + _BinaryPredicate __pred) { + // shorten sequences as much as possible by lopping of any equal prefix + for (; __first1 != __last1; ++__first1, (void)++__first2) + if (!__pred(*__first1, *__first2)) + break; + if (__first1 == __last1) + return true; + + // __first1 != __last1 && *__first1 != *__first2 + typedef typename iterator_traits<_ForwardIterator1>::difference_type _D1; + _D1 __l1 = _VSTD::distance(__first1, __last1); + if (__l1 == _D1(1)) + return false; + _ForwardIterator2 __last2 = _VSTD::next(__first2, __l1); + // For each element in [f1, l1) see if there are the same number of + // equal elements in [f2, l2) + for (_ForwardIterator1 __i = __first1; __i != __last1; ++__i) { + // Have we already counted the number of *__i in [f1, l1)? + _ForwardIterator1 __match = __first1; + for (; __match != __i; ++__match) + if (__pred(*__match, *__i)) + break; + if (__match == __i) { + // Count number of *__i in [f2, l2) + _D1 __c2 = 0; + for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) + if (__pred(*__i, *__j)) + ++__c2; + if (__c2 == 0) + return false; + // Count number of *__i in [__i, l1) (we can start with 1) + _D1 __c1 = 1; + for (_ForwardIterator1 __j = _VSTD::next(__i); __j != __last1; ++__j) + if (__pred(*__i, *__j)) + ++__c1; + if (__c1 != __c2) + return false; + } + } + return true; +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2) { + typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; + typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; + return _VSTD::is_permutation(__first1, __last1, __first2, __equal_to<__v1, __v2>()); +} + +#if _LIBCPP_STD_VER > 11 +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 bool +__is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, + _ForwardIterator2 __last2, _BinaryPredicate __pred, forward_iterator_tag, forward_iterator_tag) { + // shorten sequences as much as possible by lopping of any equal prefix + for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void)++__first2) + if (!__pred(*__first1, *__first2)) + break; + if (__first1 == __last1) + return __first2 == __last2; + else if (__first2 == __last2) + return false; + + typedef typename iterator_traits<_ForwardIterator1>::difference_type _D1; + _D1 __l1 = _VSTD::distance(__first1, __last1); + + typedef typename iterator_traits<_ForwardIterator2>::difference_type _D2; + _D2 __l2 = _VSTD::distance(__first2, __last2); + if (__l1 != __l2) + return false; + + // For each element in [f1, l1) see if there are the same number of + // equal elements in [f2, l2) + for (_ForwardIterator1 __i = __first1; __i != __last1; ++__i) { + // Have we already counted the number of *__i in [f1, l1)? + _ForwardIterator1 __match = __first1; + for (; __match != __i; ++__match) + if (__pred(*__match, *__i)) + break; + if (__match == __i) { + // Count number of *__i in [f2, l2) + _D1 __c2 = 0; + for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) + if (__pred(*__i, *__j)) + ++__c2; + if (__c2 == 0) + return false; + // Count number of *__i in [__i, l1) (we can start with 1) + _D1 __c1 = 1; + for (_ForwardIterator1 __j = _VSTD::next(__i); __j != __last1; ++__j) + if (__pred(*__i, *__j)) + ++__c1; + if (__c1 != __c2) + return false; + } + } + return true; +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 bool __is_permutation(_RandomAccessIterator1 __first1, _RandomAccessIterator2 __last1, + _RandomAccessIterator1 __first2, _RandomAccessIterator2 __last2, + _BinaryPredicate __pred, random_access_iterator_tag, + random_access_iterator_tag) { + if (_VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) + return false; + return _VSTD::is_permutation<_RandomAccessIterator1, _RandomAccessIterator2, + typename add_lvalue_reference<_BinaryPredicate>::type>(__first1, __last1, __first2, + __pred); +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, + _ForwardIterator2 __last2, _BinaryPredicate __pred) { + return _VSTD::__is_permutation::type>( + __first1, __last1, __first2, __last2, __pred, typename iterator_traits<_ForwardIterator1>::iterator_category(), + typename iterator_traits<_ForwardIterator2>::iterator_category()); +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, + _ForwardIterator2 __last2) { + typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; + typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; + return _VSTD::__is_permutation(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>(), + typename iterator_traits<_ForwardIterator1>::iterator_category(), + typename iterator_traits<_ForwardIterator2>::iterator_category()); +} +#endif + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_IS_PERMUTATION_H diff --git a/libcxx/include/__algorithm/is_sorted.h b/libcxx/include/__algorithm/is_sorted.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/is_sorted.h @@ -0,0 +1,76 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_IS_SORTED_H +#define _LIBCPP___ALGORITHM_IS_SORTED_H + +#include <__config> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// is_sorted_until + +template +_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +is_sorted_until(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) +{ + if (__first != __last) + { + _ForwardIterator __i = __first; + while (++__i != __last) + { + if (__comp(*__i, *__first)) + return __i; + __first = __i; + } + } + return __last; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_ForwardIterator +is_sorted_until(_ForwardIterator __first, _ForwardIterator __last) +{ + return _VSTD::is_sorted_until(__first, __last, __less::value_type>()); +} + +// is_sorted + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +is_sorted(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) +{ + return _VSTD::is_sorted_until(__first, __last, __comp) == __last; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +is_sorted(_ForwardIterator __first, _ForwardIterator __last) +{ + return _VSTD::is_sorted(__first, __last, __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_IS_SORTED_H diff --git a/libcxx/include/__algorithm/lexicographical_compare.h b/libcxx/include/__algorithm/lexicographical_compare.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/lexicographical_compare.h @@ -0,0 +1,67 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_LEXICOGRAPHICAL_COMPARE_H +#define _LIBCPP___ALGORITHM_LEXICOGRAPHICAL_COMPARE_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 bool +__lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp) +{ + for (; __first2 != __last2; ++__first1, (void) ++__first2) + { + if (__first1 == __last1 || __comp(*__first1, *__first2)) + return true; + if (__comp(*__first2, *__first1)) + return false; + } + return false; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__lexicographical_compare<_Comp_ref>(__first1, __last1, __first2, __last2, __comp); +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2) +{ + return _VSTD::lexicographical_compare(__first1, __last1, __first2, __last2, + __less::value_type, + typename iterator_traits<_InputIterator2>::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_LEXICOGRAPHICAL_COMPARE_H diff --git a/libcxx/include/__algorithm/lower_bound.h b/libcxx/include/__algorithm/lower_bound.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/lower_bound.h @@ -0,0 +1,72 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_LOWER_BOUND_H +#define _LIBCPP___ALGORITHM_LOWER_BOUND_H + +#include <__config> +#include <__algorithm/half_positive.h> +#include <__algorithm/comp.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +__lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) +{ + typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; + difference_type __len = _VSTD::distance(__first, __last); + while (__len != 0) + { + difference_type __l2 = _VSTD::__half_positive(__len); + _ForwardIterator __m = __first; + _VSTD::advance(__m, __l2); + if (__comp(*__m, __value_)) + { + __first = ++__m; + __len -= __l2 + 1; + } + else + __len = __l2; + } + return __first; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_ForwardIterator +lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) +{ + typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; + return _VSTD::__lower_bound<_Comp_ref>(__first, __last, __value_, __comp); +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_ForwardIterator +lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) +{ + return _VSTD::lower_bound(__first, __last, __value_, + __less::value_type, _Tp>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_LOWER_BOUND_H diff --git a/libcxx/include/__algorithm/make_heap.h b/libcxx/include/__algorithm/make_heap.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/make_heap.h @@ -0,0 +1,63 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MAKE_HEAP_H +#define _LIBCPP___ALGORITHM_MAKE_HEAP_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/sift_down.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 void +__make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + difference_type __n = __last - __first; + if (__n > 1) + { + // start from the first parent, there is no need to consider children + for (difference_type __start = (__n - 2) / 2; __start >= 0; --__start) + { + _VSTD::__sift_down<_Compare>(__first, __last, __comp, __n, __first + __start); + } + } +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + _VSTD::__make_heap<_Comp_ref>(__first, __last, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) +{ + _VSTD::make_heap(__first, __last, __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MAKE_HEAP_H diff --git a/libcxx/include/__algorithm/max.h b/libcxx/include/__algorithm/max.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/max.h @@ -0,0 +1,70 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MAX_H +#define _LIBCPP___ALGORITHM_MAX_H + +#include <__config> +#include <__algorithm/comp.h> +#include <__algorithm/max_element.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +const _Tp& +max(const _Tp& __a, const _Tp& __b, _Compare __comp) +{ + return __comp(__a, __b) ? __b : __a; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +const _Tp& +max(const _Tp& __a, const _Tp& __b) +{ + return _VSTD::max(__a, __b, __less<_Tp>()); +} + +#ifndef _LIBCPP_CXX03_LANG + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +_Tp +max(initializer_list<_Tp> __t, _Compare __comp) +{ + return *_VSTD::max_element(__t.begin(), __t.end(), __comp); +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +_Tp +max(initializer_list<_Tp> __t) +{ + return *_VSTD::max_element(__t.begin(), __t.end(), __less<_Tp>()); +} + +#endif // _LIBCPP_CXX03_LANG + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MAX_H diff --git a/libcxx/include/__algorithm/max_element.h b/libcxx/include/__algorithm/max_element.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/max_element.h @@ -0,0 +1,57 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MAX_ELEMENT_H +#define _LIBCPP___ALGORITHM_MAX_ELEMENT_H + +#include <__config> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +_ForwardIterator +max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) +{ + static_assert(__is_cpp17_forward_iterator<_ForwardIterator>::value, + "std::max_element requires a ForwardIterator"); + if (__first != __last) + { + _ForwardIterator __i = __first; + while (++__i != __last) + if (__comp(*__first, *__i)) + __first = __i; + } + return __first; +} + + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +_ForwardIterator +max_element(_ForwardIterator __first, _ForwardIterator __last) +{ + return _VSTD::max_element(__first, __last, + __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MAX_ELEMENT_H diff --git a/libcxx/include/__algorithm/merge.h b/libcxx/include/__algorithm/merge.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/merge.h @@ -0,0 +1,75 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MERGE_H +#define _LIBCPP___ALGORITHM_MERGE_H + +#include <__config> +#include <__algorithm/copy.h> +#include <__algorithm/comp_ref_type.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +__merge(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + for (; __first1 != __last1; ++__result) + { + if (__first2 == __last2) + return _VSTD::copy(__first1, __last1, __result); + if (__comp(*__first2, *__first1)) + { + *__result = *__first2; + ++__first2; + } + else + { + *__result = *__first1; + ++__first1; + } + } + return _VSTD::copy(__first2, __last2, __result); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +merge(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__merge<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +merge(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) +{ + typedef typename iterator_traits<_InputIterator1>::value_type __v1; + typedef typename iterator_traits<_InputIterator2>::value_type __v2; + return _VSTD::merge(__first1, __last1, __first2, __last2, __result, __less<__v1, __v2>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MERGE_H diff --git a/libcxx/include/__algorithm/min.h b/libcxx/include/__algorithm/min.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/min.h @@ -0,0 +1,70 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MIN_H +#define _LIBCPP___ALGORITHM_MIN_H + +#include <__config> +#include <__algorithm/comp.h> +#include <__algorithm/min_element.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +const _Tp& +min(const _Tp& __a, const _Tp& __b, _Compare __comp) +{ + return __comp(__b, __a) ? __b : __a; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +const _Tp& +min(const _Tp& __a, const _Tp& __b) +{ + return _VSTD::min(__a, __b, __less<_Tp>()); +} + +#ifndef _LIBCPP_CXX03_LANG + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +_Tp +min(initializer_list<_Tp> __t, _Compare __comp) +{ + return *_VSTD::min_element(__t.begin(), __t.end(), __comp); +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +_Tp +min(initializer_list<_Tp> __t) +{ + return *_VSTD::min_element(__t.begin(), __t.end(), __less<_Tp>()); +} + +#endif // _LIBCPP_CXX03_LANG + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MIN_H diff --git a/libcxx/include/__algorithm/min_element.h b/libcxx/include/__algorithm/min_element.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/min_element.h @@ -0,0 +1,56 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MIN_ELEMENT_H +#define _LIBCPP___ALGORITHM_MIN_ELEMENT_H + +#include <__config> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +_ForwardIterator +min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) +{ + static_assert(__is_cpp17_forward_iterator<_ForwardIterator>::value, + "std::min_element requires a ForwardIterator"); + if (__first != __last) + { + _ForwardIterator __i = __first; + while (++__i != __last) + if (__comp(*__i, *__first)) + __first = __i; + } + return __first; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +_ForwardIterator +min_element(_ForwardIterator __first, _ForwardIterator __last) +{ + return _VSTD::min_element(__first, __last, + __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MIN_ELEMENT_H diff --git a/libcxx/include/__algorithm/minmax.h b/libcxx/include/__algorithm/minmax.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/minmax.h @@ -0,0 +1,98 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MINMAX_H +#define _LIBCPP___ALGORITHM_MINMAX_H + +#include <__config> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +pair +minmax(const _Tp& __a, const _Tp& __b, _Compare __comp) +{ + return __comp(__b, __a) ? pair(__b, __a) : + pair(__a, __b); +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +pair +minmax(const _Tp& __a, const _Tp& __b) +{ + return _VSTD::minmax(__a, __b, __less<_Tp>()); +} + +#ifndef _LIBCPP_CXX03_LANG + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +pair<_Tp, _Tp> +minmax(initializer_list<_Tp> __t, _Compare __comp) +{ + typedef typename initializer_list<_Tp>::const_iterator _Iter; + _Iter __first = __t.begin(); + _Iter __last = __t.end(); + pair<_Tp, _Tp> __result(*__first, *__first); + + ++__first; + if (__t.size() % 2 == 0) + { + if (__comp(*__first, __result.first)) + __result.first = *__first; + else + __result.second = *__first; + ++__first; + } + + while (__first != __last) + { + _Tp __prev = *__first++; + if (__comp(*__first, __prev)) { + if ( __comp(*__first, __result.first)) __result.first = *__first; + if (!__comp(__prev, __result.second)) __result.second = __prev; + } + else { + if ( __comp(__prev, __result.first)) __result.first = __prev; + if (!__comp(*__first, __result.second)) __result.second = *__first; + } + + __first++; + } + return __result; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +pair<_Tp, _Tp> +minmax(initializer_list<_Tp> __t) +{ + return _VSTD::minmax(__t, __less<_Tp>()); +} + +#endif // _LIBCPP_CXX03_LANG + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MINMAX_H diff --git a/libcxx/include/__algorithm/minmax_element.h b/libcxx/include/__algorithm/minmax_element.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/minmax_element.h @@ -0,0 +1,89 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MINMAX_ELEMENT_H +#define _LIBCPP___ALGORITHM_MINMAX_ELEMENT_H + +#include <__config> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX11 +pair<_ForwardIterator, _ForwardIterator> +minmax_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) +{ + static_assert(__is_cpp17_forward_iterator<_ForwardIterator>::value, + "std::minmax_element requires a ForwardIterator"); + pair<_ForwardIterator, _ForwardIterator> __result(__first, __first); + if (__first != __last) + { + if (++__first != __last) + { + if (__comp(*__first, *__result.first)) + __result.first = __first; + else + __result.second = __first; + while (++__first != __last) + { + _ForwardIterator __i = __first; + if (++__first == __last) + { + if (__comp(*__i, *__result.first)) + __result.first = __i; + else if (!__comp(*__i, *__result.second)) + __result.second = __i; + break; + } + else + { + if (__comp(*__first, *__i)) + { + if (__comp(*__first, *__result.first)) + __result.first = __first; + if (!__comp(*__i, *__result.second)) + __result.second = __i; + } + else + { + if (__comp(*__i, *__result.first)) + __result.first = __i; + if (!__comp(*__first, *__result.second)) + __result.second = __first; + } + } + } + } + } + return __result; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +pair<_ForwardIterator, _ForwardIterator> +minmax_element(_ForwardIterator __first, _ForwardIterator __last) +{ + return _VSTD::minmax_element(__first, __last, + __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MINMAX_ELEMENT_H diff --git a/libcxx/include/__algorithm/mismatch.h b/libcxx/include/__algorithm/mismatch.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/mismatch.h @@ -0,0 +1,71 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MISMATCH_H +#define _LIBCPP___ALGORITHM_MISMATCH_H + +#include <__config> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY + _LIBCPP_CONSTEXPR_AFTER_CXX17 pair<_InputIterator1, _InputIterator2> + mismatch(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate __pred) { + for (; __first1 != __last1; ++__first1, (void)++__first2) + if (!__pred(*__first1, *__first2)) + break; + return pair<_InputIterator1, _InputIterator2>(__first1, __first2); +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY + _LIBCPP_CONSTEXPR_AFTER_CXX17 pair<_InputIterator1, _InputIterator2> + mismatch(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) { + typedef typename iterator_traits<_InputIterator1>::value_type __v1; + typedef typename iterator_traits<_InputIterator2>::value_type __v2; + return _VSTD::mismatch(__first1, __last1, __first2, __equal_to<__v1, __v2>()); +} + +#if _LIBCPP_STD_VER > 11 +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY + _LIBCPP_CONSTEXPR_AFTER_CXX17 pair<_InputIterator1, _InputIterator2> + mismatch(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, + _BinaryPredicate __pred) { + for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void)++__first2) + if (!__pred(*__first1, *__first2)) + break; + return pair<_InputIterator1, _InputIterator2>(__first1, __first2); +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY + _LIBCPP_CONSTEXPR_AFTER_CXX17 pair<_InputIterator1, _InputIterator2> + mismatch(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) { + typedef typename iterator_traits<_InputIterator1>::value_type __v1; + typedef typename iterator_traits<_InputIterator2>::value_type __v2; + return _VSTD::mismatch(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); +} +#endif + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MISMATCH_H diff --git a/libcxx/include/__algorithm/move.h b/libcxx/include/__algorithm/move.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/move.h @@ -0,0 +1,136 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_MOVE_H +#define _LIBCPP___ALGORITHM_MOVE_H + +#include <__config> +#include <__algorithm/unwrap_iter.h> +#include +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// move + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 +_OutputIterator +__move_constexpr(_InputIterator __first, _InputIterator __last, _OutputIterator __result) +{ + for (; __first != __last; ++__first, (void) ++__result) + *__result = _VSTD::move(*__first); + return __result; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 +_OutputIterator +__move(_InputIterator __first, _InputIterator __last, _OutputIterator __result) +{ + return _VSTD::__move_constexpr(__first, __last, __result); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 +typename enable_if +< + is_same::type, _Up>::value && + is_trivially_move_assignable<_Up>::value, + _Up* +>::type +__move(_Tp* __first, _Tp* __last, _Up* __result) +{ + const size_t __n = static_cast(__last - __first); + if (__n > 0) + _VSTD::memmove(__result, __first, __n * sizeof(_Up)); + return __result + __n; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +move(_InputIterator __first, _InputIterator __last, _OutputIterator __result) +{ + if (__libcpp_is_constant_evaluated()) { + return _VSTD::__move_constexpr(__first, __last, __result); + } else { + return _VSTD::__rewrap_iter(__result, + _VSTD::__move(_VSTD::__unwrap_iter(__first), + _VSTD::__unwrap_iter(__last), + _VSTD::__unwrap_iter(__result))); + } +} + +// move_backward + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 +_OutputIterator +__move_backward_constexpr(_InputIterator __first, _InputIterator __last, _OutputIterator __result) +{ + while (__first != __last) + *--__result = _VSTD::move(*--__last); + return __result; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 +_OutputIterator +__move_backward(_InputIterator __first, _InputIterator __last, _OutputIterator __result) +{ + return _VSTD::__move_backward_constexpr(__first, __last, __result); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 +typename enable_if +< + is_same::type, _Up>::value && + is_trivially_move_assignable<_Up>::value, + _Up* +>::type +__move_backward(_Tp* __first, _Tp* __last, _Up* __result) +{ + const size_t __n = static_cast(__last - __first); + if (__n > 0) + { + __result -= __n; + _VSTD::memmove(__result, __first, __n * sizeof(_Up)); + } + return __result; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_BidirectionalIterator2 +move_backward(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last, + _BidirectionalIterator2 __result) +{ + if (__libcpp_is_constant_evaluated()) { + return _VSTD::__move_backward_constexpr(__first, __last, __result); + } else { + return _VSTD::__rewrap_iter(__result, + _VSTD::__move_backward(_VSTD::__unwrap_iter(__first), + _VSTD::__unwrap_iter(__last), + _VSTD::__unwrap_iter(__result))); + } +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_MOVE_H diff --git a/libcxx/include/__algorithm/next_permutation.h b/libcxx/include/__algorithm/next_permutation.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/next_permutation.h @@ -0,0 +1,75 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_NEXT_PERMUTATION_H +#define _LIBCPP___ALGORITHM_NEXT_PERMUTATION_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/reverse.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 bool +__next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) +{ + _BidirectionalIterator __i = __last; + if (__first == __last || __first == --__i) + return false; + while (true) + { + _BidirectionalIterator __ip1 = __i; + if (__comp(*--__i, *__ip1)) + { + _BidirectionalIterator __j = __last; + while (!__comp(*__i, *--__j)) + ; + swap(*__i, *__j); + _VSTD::reverse(__ip1, __last); + return true; + } + if (__i == __first) + { + _VSTD::reverse(__first, __last); + return false; + } + } +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__next_permutation<_Comp_ref>(__first, __last, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last) +{ + return _VSTD::next_permutation(__first, __last, + __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_NEXT_PERMUTATION_H diff --git a/libcxx/include/__algorithm/none_of.h b/libcxx/include/__algorithm/none_of.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/none_of.h @@ -0,0 +1,37 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_NONE_OF_H +#define _LIBCPP___ALGORITHM_NONE_OF_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool +none_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) { + for (; __first != __last; ++__first) + if (__pred(*__first)) + return false; + return true; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_NONE_OF_H diff --git a/libcxx/include/__algorithm/nth_element.h b/libcxx/include/__algorithm/nth_element.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/nth_element.h @@ -0,0 +1,242 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_NTH_ELEMENT_H +#define _LIBCPP___ALGORITHM_NTH_ELEMENT_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/sort.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 bool +__nth_element_find_guard(_RandomAccessIterator& __i, _RandomAccessIterator& __j, + _RandomAccessIterator __m, _Compare __comp) +{ + // manually guard downward moving __j against __i + while (true) { + if (__i == --__j) { + return false; + } + if (__comp(*__j, *__m)) { + return true; // found guard for downward moving __j, now use unguarded partition + } + } +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 void +__nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last, _Compare __comp) +{ + // _Compare is known to be a reference type + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + const difference_type __limit = 7; + while (true) + { + if (__nth == __last) + return; + difference_type __len = __last - __first; + switch (__len) + { + case 0: + case 1: + return; + case 2: + if (__comp(*--__last, *__first)) + swap(*__first, *__last); + return; + case 3: + { + _RandomAccessIterator __m = __first; + _VSTD::__sort3<_Compare>(__first, ++__m, --__last, __comp); + return; + } + } + if (__len <= __limit) + { + _VSTD::__selection_sort<_Compare>(__first, __last, __comp); + return; + } + // __len > __limit >= 3 + _RandomAccessIterator __m = __first + __len/2; + _RandomAccessIterator __lm1 = __last; + unsigned __n_swaps = _VSTD::__sort3<_Compare>(__first, __m, --__lm1, __comp); + // *__m is median + // partition [__first, __m) < *__m and *__m <= [__m, __last) + // (this inhibits tossing elements equivalent to __m around unnecessarily) + _RandomAccessIterator __i = __first; + _RandomAccessIterator __j = __lm1; + // j points beyond range to be tested, *__lm1 is known to be <= *__m + // The search going up is known to be guarded but the search coming down isn't. + // Prime the downward search with a guard. + if (!__comp(*__i, *__m)) // if *__first == *__m + { + // *__first == *__m, *__first doesn't go in first part + if (_VSTD::__nth_element_find_guard<_Compare>(__i, __j, __m, __comp)) { + swap(*__i, *__j); + ++__n_swaps; + } else { + // *__first == *__m, *__m <= all other elements + // Partition instead into [__first, __i) == *__first and *__first < [__i, __last) + ++__i; // __first + 1 + __j = __last; + if (!__comp(*__first, *--__j)) { // we need a guard if *__first == *(__last-1) + while (true) { + if (__i == __j) { + return; // [__first, __last) all equivalent elements + } else if (__comp(*__first, *__i)) { + swap(*__i, *__j); + ++__n_swaps; + ++__i; + break; + } + ++__i; + } + } + // [__first, __i) == *__first and *__first < [__j, __last) and __j == __last - 1 + if (__i == __j) { + return; + } + while (true) { + while (!__comp(*__first, *__i)) + ++__i; + while (__comp(*__first, *--__j)) + ; + if (__i >= __j) + break; + swap(*__i, *__j); + ++__n_swaps; + ++__i; + } + // [__first, __i) == *__first and *__first < [__i, __last) + // The first part is sorted, + if (__nth < __i) { + return; + } + // __nth_element the second part + // _VSTD::__nth_element<_Compare>(__i, __nth, __last, __comp); + __first = __i; + continue; + } + } + ++__i; + // j points beyond range to be tested, *__lm1 is known to be <= *__m + // if not yet partitioned... + if (__i < __j) + { + // known that *(__i - 1) < *__m + while (true) + { + // __m still guards upward moving __i + while (__comp(*__i, *__m)) + ++__i; + // It is now known that a guard exists for downward moving __j + while (!__comp(*--__j, *__m)) + ; + if (__i >= __j) + break; + swap(*__i, *__j); + ++__n_swaps; + // It is known that __m != __j + // If __m just moved, follow it + if (__m == __i) + __m = __j; + ++__i; + } + } + // [__first, __i) < *__m and *__m <= [__i, __last) + if (__i != __m && __comp(*__m, *__i)) + { + swap(*__i, *__m); + ++__n_swaps; + } + // [__first, __i) < *__i and *__i <= [__i+1, __last) + if (__nth == __i) + return; + if (__n_swaps == 0) + { + // We were given a perfectly partitioned sequence. Coincidence? + if (__nth < __i) + { + // Check for [__first, __i) already sorted + __j = __m = __first; + while (true) { + if (++__j == __i) { + // [__first, __i) sorted + return; + } + if (__comp(*__j, *__m)) { + // not yet sorted, so sort + break; + } + __m = __j; + } + } + else + { + // Check for [__i, __last) already sorted + __j = __m = __i; + while (true) { + if (++__j == __last) { + // [__i, __last) sorted + return; + } + if (__comp(*__j, *__m)) { + // not yet sorted, so sort + break; + } + __m = __j; + } + } + } + // __nth_element on range containing __nth + if (__nth < __i) + { + // _VSTD::__nth_element<_Compare>(__first, __nth, __i, __comp); + __last = __i; + } + else + { + // _VSTD::__nth_element<_Compare>(__i+1, __nth, __last, __comp); + __first = ++__i; + } + } +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + _VSTD::__nth_element<_Comp_ref>(__first, __nth, __last, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last) +{ + _VSTD::nth_element(__first, __nth, __last, __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_NTH_ELEMENT_H diff --git a/libcxx/include/__algorithm/partial_sort.h b/libcxx/include/__algorithm/partial_sort.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/partial_sort.h @@ -0,0 +1,114 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_PARTIAL_SORT_H +#define _LIBCPP___ALGORITHM_PARTIAL_SORT_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/make_heap.h> +#include <__algorithm/sift_down.h> +#include <__algorithm/sort_heap.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 void +__partial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, + _Compare __comp) +{ + _VSTD::__make_heap<_Compare>(__first, __middle, __comp); + typename iterator_traits<_RandomAccessIterator>::difference_type __len = __middle - __first; + for (_RandomAccessIterator __i = __middle; __i != __last; ++__i) + { + if (__comp(*__i, *__first)) + { + swap(*__i, *__first); + _VSTD::__sift_down<_Compare>(__first, __middle, __comp, __len, __first); + } + } + _VSTD::__sort_heap<_Compare>(__first, __middle, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +partial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, + _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + _VSTD::__partial_sort<_Comp_ref>(__first, __middle, __last, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +partial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last) +{ + _VSTD::partial_sort(__first, __middle, __last, + __less::value_type>()); +} + +// partial_sort_copy + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _RandomAccessIterator +__partial_sort_copy(_InputIterator __first, _InputIterator __last, + _RandomAccessIterator __result_first, _RandomAccessIterator __result_last, _Compare __comp) +{ + _RandomAccessIterator __r = __result_first; + if (__r != __result_last) + { + for (; __first != __last && __r != __result_last; ++__first, (void) ++__r) + *__r = *__first; + _VSTD::__make_heap<_Compare>(__result_first, __r, __comp); + typename iterator_traits<_RandomAccessIterator>::difference_type __len = __r - __result_first; + for (; __first != __last; ++__first) + if (__comp(*__first, *__result_first)) + { + *__result_first = *__first; + _VSTD::__sift_down<_Compare>(__result_first, __r, __comp, __len, __result_first); + } + _VSTD::__sort_heap<_Compare>(__result_first, __r, __comp); + } + return __r; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_RandomAccessIterator +partial_sort_copy(_InputIterator __first, _InputIterator __last, + _RandomAccessIterator __result_first, _RandomAccessIterator __result_last, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__partial_sort_copy<_Comp_ref>(__first, __last, __result_first, __result_last, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_RandomAccessIterator +partial_sort_copy(_InputIterator __first, _InputIterator __last, + _RandomAccessIterator __result_first, _RandomAccessIterator __result_last) +{ + return _VSTD::partial_sort_copy(__first, __last, __result_first, __result_last, + __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_PARTIAL_SORT_H diff --git a/libcxx/include/__algorithm/partition.h b/libcxx/include/__algorithm/partition.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/partition.h @@ -0,0 +1,113 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_PARTITION_H +#define _LIBCPP___ALGORITHM_PARTITION_H + +#include <__config> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// partition + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +__partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, forward_iterator_tag) +{ + while (true) + { + if (__first == __last) + return __first; + if (!__pred(*__first)) + break; + ++__first; + } + for (_ForwardIterator __p = __first; ++__p != __last;) + { + if (__pred(*__p)) + { + swap(*__first, *__p); + ++__first; + } + } + return __first; +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _BidirectionalIterator +__partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, + bidirectional_iterator_tag) +{ + while (true) + { + while (true) + { + if (__first == __last) + return __first; + if (!__pred(*__first)) + break; + ++__first; + } + do + { + if (__first == --__last) + return __first; + } while (!__pred(*__last)); + swap(*__first, *__last); + ++__first; + } +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_ForwardIterator +partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) +{ + return _VSTD::__partition::type> + (__first, __last, __pred, typename iterator_traits<_ForwardIterator>::iterator_category()); +} + +// partition_copy + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 pair<_OutputIterator1, _OutputIterator2> +partition_copy(_InputIterator __first, _InputIterator __last, + _OutputIterator1 __out_true, _OutputIterator2 __out_false, + _Predicate __pred) +{ + for (; __first != __last; ++__first) + { + if (__pred(*__first)) + { + *__out_true = *__first; + ++__out_true; + } + else + { + *__out_false = *__first; + ++__out_false; + } + } + return pair<_OutputIterator1, _OutputIterator2>(__out_true, __out_false); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_PARTITION_H diff --git a/libcxx/include/__algorithm/partition_point.h b/libcxx/include/__algorithm/partition_point.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/partition_point.h @@ -0,0 +1,51 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_PARTITION_POINT_H +#define _LIBCPP___ALGORITHM_PARTITION_POINT_H + +#include <__config> +#include <__algorithm/half_positive.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +partition_point(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) +{ + typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; + difference_type __len = _VSTD::distance(__first, __last); + while (__len != 0) + { + difference_type __l2 = _VSTD::__half_positive(__len); + _ForwardIterator __m = __first; + _VSTD::advance(__m, __l2); + if (__pred(*__m)) + { + __first = ++__m; + __len -= __l2 + 1; + } + else + __len = __l2; + } + return __first; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_PARTITION_POINT_H diff --git a/libcxx/include/__algorithm/pop_heap.h b/libcxx/include/__algorithm/pop_heap.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/pop_heap.h @@ -0,0 +1,60 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_POP_HEAP_H +#define _LIBCPP___ALGORITHM_POP_HEAP_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/sift_down.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +__pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, + typename iterator_traits<_RandomAccessIterator>::difference_type __len) +{ + if (__len > 1) + { + swap(*__first, *--__last); + _VSTD::__sift_down<_Compare>(__first, __last, __comp, __len - 1, __first); + } +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + _VSTD::__pop_heap<_Comp_ref>(__first, __last, __comp, __last - __first); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) +{ + _VSTD::pop_heap(__first, __last, __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_POP_HEAP_H diff --git a/libcxx/include/__algorithm/prev_permutation.h b/libcxx/include/__algorithm/prev_permutation.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/prev_permutation.h @@ -0,0 +1,76 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_PREV_PERMUTATION_H +#define _LIBCPP___ALGORITHM_PREV_PERMUTATION_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/comp.h> +#include <__algorithm/reverse.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 bool +__prev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) +{ + _BidirectionalIterator __i = __last; + if (__first == __last || __first == --__i) + return false; + while (true) + { + _BidirectionalIterator __ip1 = __i; + if (__comp(*__ip1, *--__i)) + { + _BidirectionalIterator __j = __last; + while (!__comp(*--__j, *__i)) + ; + swap(*__i, *__j); + _VSTD::reverse(__ip1, __last); + return true; + } + if (__i == __first) + { + _VSTD::reverse(__first, __last); + return false; + } + } +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +prev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__prev_permutation<_Comp_ref>(__first, __last, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +bool +prev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last) +{ + return _VSTD::prev_permutation(__first, __last, + __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_PREV_PERMUTATION_H diff --git a/libcxx/include/__algorithm/push_heap.h b/libcxx/include/__algorithm/push_heap.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/push_heap.h @@ -0,0 +1,74 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_PUSH_HEAP_H +#define _LIBCPP___ALGORITHM_PUSH_HEAP_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 void +__sift_up(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, + typename iterator_traits<_RandomAccessIterator>::difference_type __len) +{ + typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; + if (__len > 1) + { + __len = (__len - 2) / 2; + _RandomAccessIterator __ptr = __first + __len; + if (__comp(*__ptr, *--__last)) + { + value_type __t(_VSTD::move(*__last)); + do + { + *__last = _VSTD::move(*__ptr); + __last = __ptr; + if (__len == 0) + break; + __len = (__len - 1) / 2; + __ptr = __first + __len; + } while (__comp(*__ptr, __t)); + *__last = _VSTD::move(__t); + } + } +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + _VSTD::__sift_up<_Comp_ref>(__first, __last, __comp, __last - __first); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) +{ + _VSTD::push_heap(__first, __last, __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_PUSH_HEAP_H diff --git a/libcxx/include/__algorithm/remove.h b/libcxx/include/__algorithm/remove.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/remove.h @@ -0,0 +1,111 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_REMOVE_H +#define _LIBCPP___ALGORITHM_REMOVE_H + +#include <__config> +#include <__algorithm/find.h> +#include <__algorithm/find_if.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// remove + +template +_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +remove(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) +{ + __first = _VSTD::find(__first, __last, __value_); + if (__first != __last) + { + _ForwardIterator __i = __first; + while (++__i != __last) + { + if (!(*__i == __value_)) + { + *__first = _VSTD::move(*__i); + ++__first; + } + } + } + return __first; +} + +// remove_if + +template +_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +remove_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) +{ + __first = _VSTD::find_if<_ForwardIterator, typename add_lvalue_reference<_Predicate>::type> + (__first, __last, __pred); + if (__first != __last) + { + _ForwardIterator __i = __first; + while (++__i != __last) + { + if (!__pred(*__i)) + { + *__first = _VSTD::move(*__i); + ++__first; + } + } + } + return __first; +} + +// remove_copy + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +remove_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, const _Tp& __value_) +{ + for (; __first != __last; ++__first) + { + if (!(*__first == __value_)) + { + *__result = *__first; + ++__result; + } + } + return __result; +} + +// remove_copy_if + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +remove_copy_if(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Predicate __pred) +{ + for (; __first != __last; ++__first) + { + if (!__pred(*__first)) + { + *__result = *__first; + ++__result; + } + } + return __result; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_REMOVE_H diff --git a/libcxx/include/__algorithm/replace.h b/libcxx/include/__algorithm/replace.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/replace.h @@ -0,0 +1,83 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_REPLACE_H +#define _LIBCPP___ALGORITHM_REPLACE_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// replace + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +replace(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __old_value, const _Tp& __new_value) +{ + for (; __first != __last; ++__first) + if (*__first == __old_value) + *__first = __new_value; +} + +// replace_if + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +replace_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, const _Tp& __new_value) +{ + for (; __first != __last; ++__first) + if (__pred(*__first)) + *__first = __new_value; +} + +// replace_copy + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +replace_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, + const _Tp& __old_value, const _Tp& __new_value) +{ + for (; __first != __last; ++__first, (void) ++__result) + if (*__first == __old_value) + *__result = __new_value; + else + *__result = *__first; + return __result; +} + +// replace_copy_if + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +replace_copy_if(_InputIterator __first, _InputIterator __last, _OutputIterator __result, + _Predicate __pred, const _Tp& __new_value) +{ + for (; __first != __last; ++__first, (void) ++__result) + if (__pred(*__first)) + *__result = __new_value; + else + *__result = *__first; + return __result; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_REPLACE_H diff --git a/libcxx/include/__algorithm/reverse.h b/libcxx/include/__algorithm/reverse.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/reverse.h @@ -0,0 +1,75 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_REVERSE_H +#define _LIBCPP___ALGORITHM_REVERSE_H + +#include <__config> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// reverse + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +__reverse(_BidirectionalIterator __first, _BidirectionalIterator __last, bidirectional_iterator_tag) +{ + while (__first != __last) + { + if (__first == --__last) + break; + _VSTD::iter_swap(__first, __last); + ++__first; + } +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +__reverse(_RandomAccessIterator __first, _RandomAccessIterator __last, random_access_iterator_tag) +{ + if (__first != __last) + for (; __first < --__last; ++__first) + _VSTD::iter_swap(__first, __last); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +reverse(_BidirectionalIterator __first, _BidirectionalIterator __last) +{ + _VSTD::__reverse(__first, __last, typename iterator_traits<_BidirectionalIterator>::iterator_category()); +} + +// reverse_copy + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +reverse_copy(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __result) +{ + for (; __first != __last; ++__result) + *__result = *--__last; + return __result; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_REVERSE_H diff --git a/libcxx/include/__algorithm/rotate.h b/libcxx/include/__algorithm/rotate.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/rotate.h @@ -0,0 +1,210 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_ROTATE_H +#define _LIBCPP___ALGORITHM_ROTATE_H + +#include <__config> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// rotate + +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 _ForwardIterator +__rotate_left(_ForwardIterator __first, _ForwardIterator __last) +{ + typedef typename iterator_traits<_ForwardIterator>::value_type value_type; + value_type __tmp = _VSTD::move(*__first); + _ForwardIterator __lm1 = _VSTD::move(_VSTD::next(__first), __last, __first); + *__lm1 = _VSTD::move(__tmp); + return __lm1; +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 _BidirectionalIterator +__rotate_right(_BidirectionalIterator __first, _BidirectionalIterator __last) +{ + typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; + _BidirectionalIterator __lm1 = _VSTD::prev(__last); + value_type __tmp = _VSTD::move(*__lm1); + _BidirectionalIterator __fp1 = _VSTD::move_backward(__first, __lm1, __last); + *__first = _VSTD::move(__tmp); + return __fp1; +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX14 _ForwardIterator +__rotate_forward(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last) +{ + _ForwardIterator __i = __middle; + while (true) + { + swap(*__first, *__i); + ++__first; + if (++__i == __last) + break; + if (__first == __middle) + __middle = __i; + } + _ForwardIterator __r = __first; + if (__first != __middle) + { + __i = __middle; + while (true) + { + swap(*__first, *__i); + ++__first; + if (++__i == __last) + { + if (__first == __middle) + break; + __i = __middle; + } + else if (__first == __middle) + __middle = __i; + } + } + return __r; +} + +template +inline _LIBCPP_INLINE_VISIBILITY +_LIBCPP_CONSTEXPR_AFTER_CXX14 _Integral +__algo_gcd(_Integral __x, _Integral __y) +{ + do + { + _Integral __t = __x % __y; + __x = __y; + __y = __t; + } while (__y); + return __x; +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX14 _RandomAccessIterator +__rotate_gcd(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last) +{ + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; + + const difference_type __m1 = __middle - __first; + const difference_type __m2 = __last - __middle; + if (__m1 == __m2) + { + _VSTD::swap_ranges(__first, __middle, __middle); + return __middle; + } + const difference_type __g = _VSTD::__algo_gcd(__m1, __m2); + for (_RandomAccessIterator __p = __first + __g; __p != __first;) + { + value_type __t(_VSTD::move(*--__p)); + _RandomAccessIterator __p1 = __p; + _RandomAccessIterator __p2 = __p1 + __m1; + do + { + *__p1 = _VSTD::move(*__p2); + __p1 = __p2; + const difference_type __d = __last - __p2; + if (__m1 < __d) + __p2 += __m1; + else + __p2 = __first + (__m1 - __d); + } while (__p2 != __p); + *__p1 = _VSTD::move(__t); + } + return __first + __m2; +} + +template +inline _LIBCPP_INLINE_VISIBILITY +_LIBCPP_CONSTEXPR_AFTER_CXX11 _ForwardIterator +__rotate(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, + _VSTD::forward_iterator_tag) +{ + typedef typename iterator_traits<_ForwardIterator>::value_type value_type; + if (is_trivially_move_assignable::value) + { + if (_VSTD::next(__first) == __middle) + return _VSTD::__rotate_left(__first, __last); + } + return _VSTD::__rotate_forward(__first, __middle, __last); +} + +template +inline _LIBCPP_INLINE_VISIBILITY +_LIBCPP_CONSTEXPR_AFTER_CXX11 _BidirectionalIterator +__rotate(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, + bidirectional_iterator_tag) +{ + typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; + if (is_trivially_move_assignable::value) + { + if (_VSTD::next(__first) == __middle) + return _VSTD::__rotate_left(__first, __last); + if (_VSTD::next(__middle) == __last) + return _VSTD::__rotate_right(__first, __last); + } + return _VSTD::__rotate_forward(__first, __middle, __last); +} + +template +inline _LIBCPP_INLINE_VISIBILITY +_LIBCPP_CONSTEXPR_AFTER_CXX11 _RandomAccessIterator +__rotate(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, + random_access_iterator_tag) +{ + typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; + if (is_trivially_move_assignable::value) + { + if (_VSTD::next(__first) == __middle) + return _VSTD::__rotate_left(__first, __last); + if (_VSTD::next(__middle) == __last) + return _VSTD::__rotate_right(__first, __last); + return _VSTD::__rotate_gcd(__first, __middle, __last); + } + return _VSTD::__rotate_forward(__first, __middle, __last); +} + +template +inline _LIBCPP_INLINE_VISIBILITY +_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +rotate(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last) +{ + if (__first == __middle) + return __last; + if (__middle == __last) + return __first; + return _VSTD::__rotate(__first, __middle, __last, + typename iterator_traits<_ForwardIterator>::iterator_category()); +} + +// rotate_copy + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +rotate_copy(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, _OutputIterator __result) +{ + return _VSTD::copy(__first, __middle, _VSTD::copy(__middle, __last, __result)); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_ROTATE_H diff --git a/libcxx/include/__algorithm/sample.h b/libcxx/include/__algorithm/sample.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/sample.h @@ -0,0 +1,101 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SAMPLE_H +#define _LIBCPP___ALGORITHM_SAMPLE_H + +#include <__config> +#include <__algorithm/min.h> +#include <__algorithm/uniform_int_distribution.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_INLINE_VISIBILITY +_SampleIterator __sample(_PopulationIterator __first, + _PopulationIterator __last, _SampleIterator __output_iter, + _Distance __n, + _UniformRandomNumberGenerator & __g, + input_iterator_tag) { + + _Distance __k = 0; + for (; __first != __last && __k < __n; ++__first, (void) ++__k) + __output_iter[__k] = *__first; + _Distance __sz = __k; + for (; __first != __last; ++__first, (void) ++__k) { + _Distance __r = uniform_int_distribution<_Distance>(0, __k)(__g); + if (__r < __sz) + __output_iter[__r] = *__first; + } + return __output_iter + _VSTD::min(__n, __k); +} + +template +_LIBCPP_INLINE_VISIBILITY +_SampleIterator __sample(_PopulationIterator __first, + _PopulationIterator __last, _SampleIterator __output_iter, + _Distance __n, + _UniformRandomNumberGenerator& __g, + forward_iterator_tag) { + _Distance __unsampled_sz = _VSTD::distance(__first, __last); + for (__n = _VSTD::min(__n, __unsampled_sz); __n != 0; ++__first) { + _Distance __r = uniform_int_distribution<_Distance>(0, --__unsampled_sz)(__g); + if (__r < __n) { + *__output_iter++ = *__first; + --__n; + } + } + return __output_iter; +} + +template +_LIBCPP_INLINE_VISIBILITY +_SampleIterator __sample(_PopulationIterator __first, + _PopulationIterator __last, _SampleIterator __output_iter, + _Distance __n, _UniformRandomNumberGenerator& __g) { + typedef typename iterator_traits<_PopulationIterator>::iterator_category + _PopCategory; + typedef typename iterator_traits<_PopulationIterator>::difference_type + _Difference; + static_assert(__is_cpp17_forward_iterator<_PopulationIterator>::value || + __is_cpp17_random_access_iterator<_SampleIterator>::value, + "SampleIterator must meet the requirements of RandomAccessIterator"); + typedef typename common_type<_Distance, _Difference>::type _CommonType; + _LIBCPP_ASSERT(__n >= 0, "N must be a positive number."); + return _VSTD::__sample( + __first, __last, __output_iter, _CommonType(__n), + __g, _PopCategory()); +} + +#if _LIBCPP_STD_VER > 14 +template +inline _LIBCPP_INLINE_VISIBILITY +_SampleIterator sample(_PopulationIterator __first, + _PopulationIterator __last, _SampleIterator __output_iter, + _Distance __n, _UniformRandomNumberGenerator&& __g) { + return _VSTD::__sample(__first, __last, __output_iter, __n, __g); +} +#endif // _LIBCPP_STD_VER > 14 + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SAMPLE_H diff --git a/libcxx/include/__algorithm/search.h b/libcxx/include/__algorithm/search.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/search.h @@ -0,0 +1,59 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SEARCH_H +#define _LIBCPP___ALGORITHM_SEARCH_H + +#include <__config> +#include <__functional/search.h> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator1 +search(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _ForwardIterator2 __last2, + _BinaryPredicate __pred) { + return _VSTD::__search::type>( + __first1, __last1, __first2, __last2, __pred, + typename iterator_traits<_ForwardIterator1>::iterator_category(), + typename iterator_traits<_ForwardIterator2>::iterator_category()) + .first; +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator1 +search(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _ForwardIterator2 __last2) { + typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; + typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; + return _VSTD::search(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); +} + +#if _LIBCPP_STD_VER > 14 +template +_LIBCPP_NODISCARD_EXT _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +search(_ForwardIterator __f, _ForwardIterator __l, const _Searcher& __s) { + return __s(__f, __l).first; +} + +#endif + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SEARCH_H diff --git a/libcxx/include/__algorithm/search_n.h b/libcxx/include/__algorithm/search_n.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/search_n.h @@ -0,0 +1,115 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SEARCH_N_H +#define _LIBCPP___ALGORITHM_SEARCH_N_H + +#include <__config> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator __search_n(_ForwardIterator __first, _ForwardIterator __last, + _Size __count, const _Tp& __value_, _BinaryPredicate __pred, + forward_iterator_tag) { + if (__count <= 0) + return __first; + while (true) { + // Find first element in sequence that matchs __value_, with a mininum of loop checks + while (true) { + if (__first == __last) // return __last if no element matches __value_ + return __last; + if (__pred(*__first, __value_)) + break; + ++__first; + } + // *__first matches __value_, now match elements after here + _ForwardIterator __m = __first; + _Size __c(0); + while (true) { + if (++__c == __count) // If pattern exhausted, __first is the answer (works for 1 element pattern) + return __first; + if (++__m == __last) // Otherwise if source exhaused, pattern not found + return __last; + if (!__pred(*__m, __value_)) // if there is a mismatch, restart with a new __first + { + __first = __m; + ++__first; + break; + } // else there is a match, check next elements + } + } +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _RandomAccessIterator __search_n(_RandomAccessIterator __first, + _RandomAccessIterator __last, _Size __count, + const _Tp& __value_, _BinaryPredicate __pred, + random_access_iterator_tag) { + if (__count <= 0) + return __first; + _Size __len = static_cast<_Size>(__last - __first); + if (__len < __count) + return __last; + const _RandomAccessIterator __s = __last - (__count - 1); // Start of pattern match can't go beyond here + while (true) { + // Find first element in sequence that matchs __value_, with a mininum of loop checks + while (true) { + if (__first >= __s) // return __last if no element matches __value_ + return __last; + if (__pred(*__first, __value_)) + break; + ++__first; + } + // *__first matches __value_, now match elements after here + _RandomAccessIterator __m = __first; + _Size __c(0); + while (true) { + if (++__c == __count) // If pattern exhausted, __first is the answer (works for 1 element pattern) + return __first; + ++__m; // no need to check range on __m because __s guarantees we have enough source + if (!__pred(*__m, __value_)) // if there is a mismatch, restart with a new __first + { + __first = __m; + ++__first; + break; + } // else there is a match, check next elements + } + } +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator search_n( + _ForwardIterator __first, _ForwardIterator __last, _Size __count, const _Tp& __value_, _BinaryPredicate __pred) { + return _VSTD::__search_n::type>( + __first, __last, _VSTD::__convert_to_integral(__count), __value_, __pred, + typename iterator_traits<_ForwardIterator>::iterator_category()); +} + +template +_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +search_n(_ForwardIterator __first, _ForwardIterator __last, _Size __count, const _Tp& __value_) { + typedef typename iterator_traits<_ForwardIterator>::value_type __v; + return _VSTD::search_n(__first, __last, _VSTD::__convert_to_integral(__count), __value_, __equal_to<__v, _Tp>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SEARCH_N_H diff --git a/libcxx/include/__algorithm/set_difference.h b/libcxx/include/__algorithm/set_difference.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/set_difference.h @@ -0,0 +1,76 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SET_DIFFERENCE_H +#define _LIBCPP___ALGORITHM_SET_DIFFERENCE_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/copy.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator +__set_difference(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + while (__first1 != __last1) + { + if (__first2 == __last2) + return _VSTD::copy(__first1, __last1, __result); + if (__comp(*__first1, *__first2)) + { + *__result = *__first1; + ++__result; + ++__first1; + } + else + { + if (!__comp(*__first2, *__first1)) + ++__first1; + ++__first2; + } + } + return __result; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +set_difference(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__set_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +set_difference(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) +{ + return _VSTD::set_difference(__first1, __last1, __first2, __last2, __result, + __less::value_type, + typename iterator_traits<_InputIterator2>::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SET_DIFFERENCE_H diff --git a/libcxx/include/__algorithm/set_intersection.h b/libcxx/include/__algorithm/set_intersection.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/set_intersection.h @@ -0,0 +1,73 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SET_INTERSECTION_H +#define _LIBCPP___ALGORITHM_SET_INTERSECTION_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator +__set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + while (__first1 != __last1 && __first2 != __last2) + { + if (__comp(*__first1, *__first2)) + ++__first1; + else + { + if (!__comp(*__first2, *__first1)) + { + *__result = *__first1; + ++__result; + ++__first1; + } + ++__first2; + } + } + return __result; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__set_intersection<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) +{ + return _VSTD::set_intersection(__first1, __last1, __first2, __last2, __result, + __less::value_type, + typename iterator_traits<_InputIterator2>::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SET_INTERSECTION_H diff --git a/libcxx/include/__algorithm/set_symmetric_difference.h b/libcxx/include/__algorithm/set_symmetric_difference.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/set_symmetric_difference.h @@ -0,0 +1,81 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SET_SYMMETRIC_DIFFERENCE_H +#define _LIBCPP___ALGORITHM_SET_SYMMETRIC_DIFFERENCE_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/copy.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator +__set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + while (__first1 != __last1) + { + if (__first2 == __last2) + return _VSTD::copy(__first1, __last1, __result); + if (__comp(*__first1, *__first2)) + { + *__result = *__first1; + ++__result; + ++__first1; + } + else + { + if (__comp(*__first2, *__first1)) + { + *__result = *__first2; + ++__result; + } + else + ++__first1; + ++__first2; + } + } + return _VSTD::copy(__first2, __last2, __result); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__set_symmetric_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) +{ + return _VSTD::set_symmetric_difference(__first1, __last1, __first2, __last2, __result, + __less::value_type, + typename iterator_traits<_InputIterator2>::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SET_SYMMETRIC_DIFFERENCE_H diff --git a/libcxx/include/__algorithm/set_union.h b/libcxx/include/__algorithm/set_union.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/set_union.h @@ -0,0 +1,76 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SET_UNION_H +#define _LIBCPP___ALGORITHM_SET_UNION_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/copy.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator +__set_union(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + for (; __first1 != __last1; ++__result) + { + if (__first2 == __last2) + return _VSTD::copy(__first1, __last1, __result); + if (__comp(*__first2, *__first1)) + { + *__result = *__first2; + ++__first2; + } + else + { + if (!__comp(*__first1, *__first2)) + ++__first2; + *__result = *__first1; + ++__first1; + } + } + return _VSTD::copy(__first2, __last2, __result); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +set_union(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + return _VSTD::__set_union<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +set_union(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) +{ + return _VSTD::set_union(__first1, __last1, __first2, __last2, __result, + __less::value_type, + typename iterator_traits<_InputIterator2>::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SET_UNION_H diff --git a/libcxx/include/__algorithm/shift.h b/libcxx/include/__algorithm/shift.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/shift.h @@ -0,0 +1,132 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SHIFT_H +#define _LIBCPP___ALGORITHM_SHIFT_H + +#include <__config> +#include <__algorithm/move.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// shift_left, shift_right + +#if _LIBCPP_STD_VER > 17 + +template +inline _LIBCPP_INLINE_VISIBILITY constexpr +_ForwardIterator +shift_left(_ForwardIterator __first, _ForwardIterator __last, + typename iterator_traits<_ForwardIterator>::difference_type __n) +{ + if (__n == 0) { + return __last; + } + + _ForwardIterator __m = __first; + if constexpr (__is_cpp17_random_access_iterator<_ForwardIterator>::value) { + if (__n >= __last - __first) { + return __first; + } + __m += __n; + } else { + for (; __n > 0; --__n) { + if (__m == __last) { + return __first; + } + ++__m; + } + } + return _VSTD::move(__m, __last, __first); +} + +template +inline _LIBCPP_INLINE_VISIBILITY constexpr +_ForwardIterator +shift_right(_ForwardIterator __first, _ForwardIterator __last, + typename iterator_traits<_ForwardIterator>::difference_type __n) +{ + if (__n == 0) { + return __first; + } + + if constexpr (__is_cpp17_random_access_iterator<_ForwardIterator>::value) { + decltype(__n) __d = __last - __first; + if (__n >= __d) { + return __last; + } + _ForwardIterator __m = __first + (__d - __n); + return _VSTD::move_backward(__first, __m, __last); + } else if constexpr (__is_cpp17_bidirectional_iterator<_ForwardIterator>::value) { + _ForwardIterator __m = __last; + for (; __n > 0; --__n) { + if (__m == __first) { + return __last; + } + --__m; + } + return _VSTD::move_backward(__first, __m, __last); + } else { + _ForwardIterator __ret = __first; + for (; __n > 0; --__n) { + if (__ret == __last) { + return __last; + } + ++__ret; + } + + // We have an __n-element scratch space from __first to __ret. + // Slide an __n-element window [__trail, __lead) from left to right. + // We're essentially doing swap_ranges(__first, __ret, __trail, __lead) + // over and over; but once __lead reaches __last we needn't bother + // to save the values of elements [__trail, __last). + + auto __trail = __first; + auto __lead = __ret; + while (__trail != __ret) { + if (__lead == __last) { + _VSTD::move(__first, __trail, __ret); + return __ret; + } + ++__trail; + ++__lead; + } + + _ForwardIterator __mid = __first; + while (true) { + if (__lead == __last) { + __trail = _VSTD::move(__mid, __ret, __trail); + _VSTD::move(__first, __mid, __trail); + return __ret; + } + swap(*__mid, *__trail); + ++__mid; + ++__trail; + ++__lead; + if (__mid == __ret) { + __mid = __first; + } + } + } +} + +#endif // _LIBCPP_STD_VER > 17 + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SHIFT_H diff --git a/libcxx/include/__algorithm/shuffle.h b/libcxx/include/__algorithm/shuffle.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/shuffle.h @@ -0,0 +1,125 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SHUFFLE_H +#define _LIBCPP___ALGORITHM_SHUFFLE_H + +#include <__config> +#include <__algorithm/uniform_int_distribution.h> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + + +#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE) \ + || defined(_LIBCPP_BUILDING_LIBRARY) +class _LIBCPP_TYPE_VIS __rs_default; + +_LIBCPP_FUNC_VIS __rs_default __rs_get(); + +class _LIBCPP_TYPE_VIS __rs_default +{ + static unsigned __c_; + + __rs_default(); +public: + typedef uint_fast32_t result_type; + + static const result_type _Min = 0; + static const result_type _Max = 0xFFFFFFFF; + + __rs_default(const __rs_default&); + ~__rs_default(); + + result_type operator()(); + + static _LIBCPP_CONSTEXPR result_type min() {return _Min;} + static _LIBCPP_CONSTEXPR result_type max() {return _Max;} + + friend _LIBCPP_FUNC_VIS __rs_default __rs_get(); +}; + +_LIBCPP_FUNC_VIS __rs_default __rs_get(); + +template +_LIBCPP_DEPRECATED_IN_CXX14 void +random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last) +{ + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + typedef uniform_int_distribution _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 +_LIBCPP_DEPRECATED_IN_CXX14 void +random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last, +#ifndef _LIBCPP_CXX03_LANG + _RandomNumberGenerator&& __rand) +#else + _RandomNumberGenerator& __rand) +#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)); + } + } +} +#endif + +template + void shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last, + _UniformRandomNumberGenerator&& __g) +{ + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + typedef uniform_int_distribution _Dp; + typedef typename _Dp::param_type _Pp; + 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)) + swap(*__first, *(__first + __i)); + } + } +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SHUFFLE_H diff --git a/libcxx/include/__algorithm/sift_down.h b/libcxx/include/__algorithm/sift_down.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/sift_down.h @@ -0,0 +1,84 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SIFT_DOWN_H +#define _LIBCPP___ALGORITHM_SIFT_DOWN_H + +#include <__config> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 void +__sift_down(_RandomAccessIterator __first, _RandomAccessIterator /*__last*/, + _Compare __comp, + typename iterator_traits<_RandomAccessIterator>::difference_type __len, + _RandomAccessIterator __start) +{ + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; + // left-child of __start is at 2 * __start + 1 + // right-child of __start is at 2 * __start + 2 + difference_type __child = __start - __first; + + if (__len < 2 || (__len - 2) / 2 < __child) + return; + + __child = 2 * __child + 1; + _RandomAccessIterator __child_i = __first + __child; + + if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) { + // right-child exists and is greater than left-child + ++__child_i; + ++__child; + } + + // check if we are in heap-order + if (__comp(*__child_i, *__start)) + // we are, __start is larger than it's largest child + return; + + value_type __top(_VSTD::move(*__start)); + do + { + // we are not in heap-order, swap the parent with its largest child + *__start = _VSTD::move(*__child_i); + __start = __child_i; + + if ((__len - 2) / 2 < __child) + break; + + // recompute the child based off of the updated parent + __child = 2 * __child + 1; + __child_i = __first + __child; + + if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) { + // right-child exists and is greater than left-child + ++__child_i; + ++__child; + } + + // check if we are in heap-order + } while (!__comp(*__child_i, __top)); + *__start = _VSTD::move(__top); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SIFT_DOWN_H diff --git a/libcxx/include/__algorithm/sort.h b/libcxx/include/__algorithm/sort.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/sort.h @@ -0,0 +1,528 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SORT_H +#define _LIBCPP___ALGORITHM_SORT_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/comp.h> +#include <__algorithm/min_element.h> +#include <__algorithm/partial_sort.h> +#include <__algorithm/unwrap_iter.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// stable, 2-3 compares, 0-2 swaps + +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 unsigned +__sort3(_ForwardIterator __x, _ForwardIterator __y, _ForwardIterator __z, _Compare __c) +{ + unsigned __r = 0; + if (!__c(*__y, *__x)) // if x <= y + { + if (!__c(*__z, *__y)) // if y <= z + return __r; // x <= y && y <= z + // x <= y && y > z + swap(*__y, *__z); // x <= z && y < z + __r = 1; + if (__c(*__y, *__x)) // if x > y + { + swap(*__x, *__y); // x < y && y <= z + __r = 2; + } + return __r; // x <= y && y < z + } + if (__c(*__z, *__y)) // x > y, if y > z + { + swap(*__x, *__z); // x < y && y < z + __r = 1; + return __r; + } + swap(*__x, *__y); // x > y && y <= z + __r = 1; // x < y && x <= z + if (__c(*__z, *__y)) // if y > z + { + swap(*__y, *__z); // x <= y && y < z + __r = 2; + } + return __r; +} // x <= y && y <= z + +// stable, 3-6 compares, 0-5 swaps + +template +unsigned +__sort4(_ForwardIterator __x1, _ForwardIterator __x2, _ForwardIterator __x3, + _ForwardIterator __x4, _Compare __c) +{ + unsigned __r = _VSTD::__sort3<_Compare>(__x1, __x2, __x3, __c); + if (__c(*__x4, *__x3)) + { + swap(*__x3, *__x4); + ++__r; + if (__c(*__x3, *__x2)) + { + swap(*__x2, *__x3); + ++__r; + if (__c(*__x2, *__x1)) + { + swap(*__x1, *__x2); + ++__r; + } + } + } + return __r; +} + +// stable, 4-10 compares, 0-9 swaps + +template +_LIBCPP_HIDDEN +unsigned +__sort5(_ForwardIterator __x1, _ForwardIterator __x2, _ForwardIterator __x3, + _ForwardIterator __x4, _ForwardIterator __x5, _Compare __c) +{ + unsigned __r = _VSTD::__sort4<_Compare>(__x1, __x2, __x3, __x4, __c); + if (__c(*__x5, *__x4)) + { + swap(*__x4, *__x5); + ++__r; + if (__c(*__x4, *__x3)) + { + swap(*__x3, *__x4); + ++__r; + if (__c(*__x3, *__x2)) + { + swap(*__x2, *__x3); + ++__r; + if (__c(*__x2, *__x1)) + { + swap(*__x1, *__x2); + ++__r; + } + } + } + } + return __r; +} + +// Assumes size > 0 +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 void +__selection_sort(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) +{ + _BidirectionalIterator __lm1 = __last; + for (--__lm1; __first != __lm1; ++__first) + { + _BidirectionalIterator __i = _VSTD::min_element<_BidirectionalIterator, + typename add_lvalue_reference<_Compare>::type> + (__first, __last, __comp); + if (__i != __first) + swap(*__first, *__i); + } +} + +template +void +__insertion_sort(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) +{ + typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; + if (__first != __last) + { + _BidirectionalIterator __i = __first; + for (++__i; __i != __last; ++__i) + { + _BidirectionalIterator __j = __i; + value_type __t(_VSTD::move(*__j)); + for (_BidirectionalIterator __k = __i; __k != __first && __comp(__t, *--__k); --__j) + *__j = _VSTD::move(*__k); + *__j = _VSTD::move(__t); + } + } +} + +template +void +__insertion_sort_3(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; + _RandomAccessIterator __j = __first+2; + _VSTD::__sort3<_Compare>(__first, __first+1, __j, __comp); + for (_RandomAccessIterator __i = __j+1; __i != __last; ++__i) + { + if (__comp(*__i, *__j)) + { + value_type __t(_VSTD::move(*__i)); + _RandomAccessIterator __k = __j; + __j = __i; + do + { + *__j = _VSTD::move(*__k); + __j = __k; + } while (__j != __first && __comp(__t, *--__k)); + *__j = _VSTD::move(__t); + } + __j = __i; + } +} + +template +bool +__insertion_sort_incomplete(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + switch (__last - __first) + { + case 0: + case 1: + return true; + case 2: + if (__comp(*--__last, *__first)) + swap(*__first, *__last); + return true; + case 3: + _VSTD::__sort3<_Compare>(__first, __first+1, --__last, __comp); + return true; + case 4: + _VSTD::__sort4<_Compare>(__first, __first+1, __first+2, --__last, __comp); + return true; + case 5: + _VSTD::__sort5<_Compare>(__first, __first+1, __first+2, __first+3, --__last, __comp); + return true; + } + typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; + _RandomAccessIterator __j = __first+2; + _VSTD::__sort3<_Compare>(__first, __first+1, __j, __comp); + const unsigned __limit = 8; + unsigned __count = 0; + for (_RandomAccessIterator __i = __j+1; __i != __last; ++__i) + { + if (__comp(*__i, *__j)) + { + value_type __t(_VSTD::move(*__i)); + _RandomAccessIterator __k = __j; + __j = __i; + do + { + *__j = _VSTD::move(*__k); + __j = __k; + } while (__j != __first && __comp(__t, *--__k)); + *__j = _VSTD::move(__t); + if (++__count == __limit) + return ++__i == __last; + } + __j = __i; + } + return true; +} + +template +void +__insertion_sort_move(_BidirectionalIterator __first1, _BidirectionalIterator __last1, + typename iterator_traits<_BidirectionalIterator>::value_type* __first2, _Compare __comp) +{ + typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; + if (__first1 != __last1) + { + __destruct_n __d(0); + unique_ptr __h(__first2, __d); + value_type* __last2 = __first2; + ::new ((void*)__last2) value_type(_VSTD::move(*__first1)); + __d.template __incr(); + for (++__last2; ++__first1 != __last1; ++__last2) + { + value_type* __j2 = __last2; + value_type* __i2 = __j2; + if (__comp(*__first1, *--__i2)) + { + ::new ((void*)__j2) value_type(_VSTD::move(*__i2)); + __d.template __incr(); + for (--__j2; __i2 != __first2 && __comp(*__first1, *--__i2); --__j2) + *__j2 = _VSTD::move(*__i2); + *__j2 = _VSTD::move(*__first1); + } + else + { + ::new ((void*)__j2) value_type(_VSTD::move(*__first1)); + __d.template __incr(); + } + } + __h.release(); + } +} + +template +void +__sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; + const difference_type __limit = is_trivially_copy_constructible::value && + is_trivially_copy_assignable::value ? 30 : 6; + while (true) + { + __restart: + difference_type __len = __last - __first; + switch (__len) + { + case 0: + case 1: + return; + case 2: + if (__comp(*--__last, *__first)) + swap(*__first, *__last); + return; + case 3: + _VSTD::__sort3<_Compare>(__first, __first+1, --__last, __comp); + return; + case 4: + _VSTD::__sort4<_Compare>(__first, __first+1, __first+2, --__last, __comp); + return; + case 5: + _VSTD::__sort5<_Compare>(__first, __first+1, __first+2, __first+3, --__last, __comp); + return; + } + if (__len <= __limit) + { + _VSTD::__insertion_sort_3<_Compare>(__first, __last, __comp); + return; + } + // __len > 5 + _RandomAccessIterator __m = __first; + _RandomAccessIterator __lm1 = __last; + --__lm1; + unsigned __n_swaps; + { + difference_type __delta; + if (__len >= 1000) + { + __delta = __len/2; + __m += __delta; + __delta /= 2; + __n_swaps = _VSTD::__sort5<_Compare>(__first, __first + __delta, __m, __m+__delta, __lm1, __comp); + } + else + { + __delta = __len/2; + __m += __delta; + __n_swaps = _VSTD::__sort3<_Compare>(__first, __m, __lm1, __comp); + } + } + // *__m is median + // partition [__first, __m) < *__m and *__m <= [__m, __last) + // (this inhibits tossing elements equivalent to __m around unnecessarily) + _RandomAccessIterator __i = __first; + _RandomAccessIterator __j = __lm1; + // j points beyond range to be tested, *__m is known to be <= *__lm1 + // The search going up is known to be guarded but the search coming down isn't. + // Prime the downward search with a guard. + if (!__comp(*__i, *__m)) // if *__first == *__m + { + // *__first == *__m, *__first doesn't go in first part + // manually guard downward moving __j against __i + while (true) + { + if (__i == --__j) + { + // *__first == *__m, *__m <= all other elements + // Parition instead into [__first, __i) == *__first and *__first < [__i, __last) + ++__i; // __first + 1 + __j = __last; + if (!__comp(*__first, *--__j)) // we need a guard if *__first == *(__last-1) + { + while (true) + { + if (__i == __j) + return; // [__first, __last) all equivalent elements + if (__comp(*__first, *__i)) + { + swap(*__i, *__j); + ++__n_swaps; + ++__i; + break; + } + ++__i; + } + } + // [__first, __i) == *__first and *__first < [__j, __last) and __j == __last - 1 + if (__i == __j) + return; + while (true) + { + while (!__comp(*__first, *__i)) + ++__i; + while (__comp(*__first, *--__j)) + ; + if (__i >= __j) + break; + swap(*__i, *__j); + ++__n_swaps; + ++__i; + } + // [__first, __i) == *__first and *__first < [__i, __last) + // The first part is sorted, sort the second part + // _VSTD::__sort<_Compare>(__i, __last, __comp); + __first = __i; + goto __restart; + } + if (__comp(*__j, *__m)) + { + swap(*__i, *__j); + ++__n_swaps; + break; // found guard for downward moving __j, now use unguarded partition + } + } + } + // It is known that *__i < *__m + ++__i; + // j points beyond range to be tested, *__m is known to be <= *__lm1 + // if not yet partitioned... + if (__i < __j) + { + // known that *(__i - 1) < *__m + // known that __i <= __m + while (true) + { + // __m still guards upward moving __i + while (__comp(*__i, *__m)) + ++__i; + // It is now known that a guard exists for downward moving __j + while (!__comp(*--__j, *__m)) + ; + if (__i > __j) + break; + swap(*__i, *__j); + ++__n_swaps; + // It is known that __m != __j + // If __m just moved, follow it + if (__m == __i) + __m = __j; + ++__i; + } + } + // [__first, __i) < *__m and *__m <= [__i, __last) + if (__i != __m && __comp(*__m, *__i)) + { + swap(*__i, *__m); + ++__n_swaps; + } + // [__first, __i) < *__i and *__i <= [__i+1, __last) + // If we were given a perfect partition, see if insertion sort is quick... + if (__n_swaps == 0) + { + bool __fs = _VSTD::__insertion_sort_incomplete<_Compare>(__first, __i, __comp); + if (_VSTD::__insertion_sort_incomplete<_Compare>(__i+1, __last, __comp)) + { + if (__fs) + return; + __last = __i; + continue; + } + else + { + if (__fs) + { + __first = ++__i; + continue; + } + } + } + // sort smaller range with recursive call and larger with tail recursion elimination + if (__i - __first < __last - __i) + { + _VSTD::__sort<_Compare>(__first, __i, __comp); + // _VSTD::__sort<_Compare>(__i+1, __last, __comp); + __first = ++__i; + } + else + { + _VSTD::__sort<_Compare>(__i+1, __last, __comp); + // _VSTD::__sort<_Compare>(__first, __i, __comp); + __last = __i; + } + } +} + +template +inline _LIBCPP_INLINE_VISIBILITY +void +__sort(_Tp** __first, _Tp** __last, __less<_Tp*>&) +{ + __less __comp; + _VSTD::__sort<__less&, uintptr_t*>((uintptr_t*)__first, (uintptr_t*)__last, __comp); +} + +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, char*>(char*, char*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, wchar_t*>(wchar_t*, wchar_t*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, signed char*>(signed char*, signed char*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, unsigned char*>(unsigned char*, unsigned char*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, short*>(short*, short*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, unsigned short*>(unsigned short*, unsigned short*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, int*>(int*, int*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, unsigned*>(unsigned*, unsigned*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, long*>(long*, long*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, unsigned long*>(unsigned long*, unsigned long*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, long long*>(long long*, long long*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, unsigned long long*>(unsigned long long*, unsigned long long*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, float*>(float*, float*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, double*>(double*, double*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, long double*>(long double*, long double*, __less&)) + +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, char*>(char*, char*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, wchar_t*>(wchar_t*, wchar_t*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, signed char*>(signed char*, signed char*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, unsigned char*>(unsigned char*, unsigned char*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, short*>(short*, short*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, unsigned short*>(unsigned short*, unsigned short*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, int*>(int*, int*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, unsigned*>(unsigned*, unsigned*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, long*>(long*, long*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, unsigned long*>(unsigned long*, unsigned long*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, long long*>(long long*, long long*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, unsigned long long*>(unsigned long long*, unsigned long long*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, float*>(float*, float*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, double*>(double*, double*, __less&)) +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, long double*>(long double*, long double*, __less&)) + +_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS unsigned __sort5<__less&, long double*>(long double*, long double*, long double*, long double*, long double*, __less&)) + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + if (__libcpp_is_constant_evaluated()) { + _VSTD::__partial_sort<_Comp_ref>(__first, __last, __last, _Comp_ref(__comp)); + } else { + _VSTD::__sort<_Comp_ref>(_VSTD::__unwrap_iter(__first), _VSTD::__unwrap_iter(__last), _Comp_ref(__comp)); + } +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +sort(_RandomAccessIterator __first, _RandomAccessIterator __last) +{ + _VSTD::sort(__first, __last, __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SORT_H diff --git a/libcxx/include/__algorithm/sort_heap.h b/libcxx/include/__algorithm/sort_heap.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/sort_heap.h @@ -0,0 +1,56 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_SORT_HEAP_H +#define _LIBCPP___ALGORITHM_SORT_HEAP_H + +#include <__config> +#include <__algorithm/pop_heap.h> +#include <__algorithm/comp_ref_type.h> +#include <__iterator/iterator_traits.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 void +__sort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + for (difference_type __n = __last - __first; __n > 1; --__last, (void) --__n) + _VSTD::__pop_heap<_Compare>(__first, __last, __comp, __n); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +sort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + _VSTD::__sort_heap<_Comp_ref>(__first, __last, __comp); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +void +sort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) +{ + _VSTD::sort_heap(__first, __last, __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_SORT_HEAP_H diff --git a/libcxx/include/__algorithm/stable_partition.h b/libcxx/include/__algorithm/stable_partition.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/stable_partition.h @@ -0,0 +1,304 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_STABLE_PARTITION_H +#define _LIBCPP___ALGORITHM_STABLE_PARTITION_H + +#include <__config> +#include <__algorithm/rotate.h> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_ForwardIterator +__stable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, + _Distance __len, _Pair __p, forward_iterator_tag __fit) +{ + // *__first is known to be false + // __len >= 1 + if (__len == 1) + return __first; + if (__len == 2) + { + _ForwardIterator __m = __first; + if (__pred(*++__m)) + { + swap(*__first, *__m); + return __m; + } + return __first; + } + if (__len <= __p.second) + { // The buffer is big enough to use + typedef typename iterator_traits<_ForwardIterator>::value_type value_type; + __destruct_n __d(0); + unique_ptr __h(__p.first, __d); + // Move the falses into the temporary buffer, and the trues to the front of the line + // Update __first to always point to the end of the trues + value_type* __t = __p.first; + ::new ((void*)__t) value_type(_VSTD::move(*__first)); + __d.template __incr(); + ++__t; + _ForwardIterator __i = __first; + while (++__i != __last) + { + if (__pred(*__i)) + { + *__first = _VSTD::move(*__i); + ++__first; + } + else + { + ::new ((void*)__t) value_type(_VSTD::move(*__i)); + __d.template __incr(); + ++__t; + } + } + // All trues now at start of range, all falses in buffer + // Move falses back into range, but don't mess up __first which points to first false + __i = __first; + for (value_type* __t2 = __p.first; __t2 < __t; ++__t2, (void) ++__i) + *__i = _VSTD::move(*__t2); + // __h destructs moved-from values out of the temp buffer, but doesn't deallocate buffer + return __first; + } + // Else not enough buffer, do in place + // __len >= 3 + _ForwardIterator __m = __first; + _Distance __len2 = __len / 2; // __len2 >= 2 + _VSTD::advance(__m, __len2); + // recurse on [__first, __m), *__first know to be false + // F????????????????? + // f m l + typedef typename add_lvalue_reference<_Predicate>::type _PredRef; + _ForwardIterator __first_false = _VSTD::__stable_partition<_PredRef>(__first, __m, __pred, __len2, __p, __fit); + // TTTFFFFF?????????? + // f ff m l + // recurse on [__m, __last], except increase __m until *(__m) is false, *__last know to be true + _ForwardIterator __m1 = __m; + _ForwardIterator __second_false = __last; + _Distance __len_half = __len - __len2; + while (__pred(*__m1)) + { + if (++__m1 == __last) + goto __second_half_done; + --__len_half; + } + // TTTFFFFFTTTF?????? + // f ff m m1 l + __second_false = _VSTD::__stable_partition<_PredRef>(__m1, __last, __pred, __len_half, __p, __fit); +__second_half_done: + // TTTFFFFFTTTTTFFFFF + // f ff m sf l + return _VSTD::rotate(__first_false, __m, __second_false); + // TTTTTTTTFFFFFFFFFF + // | +} + +template +_ForwardIterator +__stable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, + forward_iterator_tag) +{ + const unsigned __alloc_limit = 3; // might want to make this a function of trivial assignment + // Either prove all true and return __first or point to first false + while (true) + { + if (__first == __last) + return __first; + if (!__pred(*__first)) + break; + ++__first; + } + // We now have a reduced range [__first, __last) + // *__first is known to be false + typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; + typedef typename iterator_traits<_ForwardIterator>::value_type value_type; + difference_type __len = _VSTD::distance(__first, __last); + pair __p(0, 0); + unique_ptr __h; + if (__len >= __alloc_limit) + { + __p = _VSTD::get_temporary_buffer(__len); + __h.reset(__p.first); + } + return _VSTD::__stable_partition::type> + (__first, __last, __pred, __len, __p, forward_iterator_tag()); +} + +template +_BidirectionalIterator +__stable_partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, + _Distance __len, _Pair __p, bidirectional_iterator_tag __bit) +{ + // *__first is known to be false + // *__last is known to be true + // __len >= 2 + if (__len == 2) + { + swap(*__first, *__last); + return __last; + } + if (__len == 3) + { + _BidirectionalIterator __m = __first; + if (__pred(*++__m)) + { + swap(*__first, *__m); + swap(*__m, *__last); + return __last; + } + swap(*__m, *__last); + swap(*__first, *__m); + return __m; + } + if (__len <= __p.second) + { // The buffer is big enough to use + typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; + __destruct_n __d(0); + unique_ptr __h(__p.first, __d); + // Move the falses into the temporary buffer, and the trues to the front of the line + // Update __first to always point to the end of the trues + value_type* __t = __p.first; + ::new ((void*)__t) value_type(_VSTD::move(*__first)); + __d.template __incr(); + ++__t; + _BidirectionalIterator __i = __first; + while (++__i != __last) + { + if (__pred(*__i)) + { + *__first = _VSTD::move(*__i); + ++__first; + } + else + { + ::new ((void*)__t) value_type(_VSTD::move(*__i)); + __d.template __incr(); + ++__t; + } + } + // move *__last, known to be true + *__first = _VSTD::move(*__i); + __i = ++__first; + // All trues now at start of range, all falses in buffer + // Move falses back into range, but don't mess up __first which points to first false + for (value_type* __t2 = __p.first; __t2 < __t; ++__t2, (void) ++__i) + *__i = _VSTD::move(*__t2); + // __h destructs moved-from values out of the temp buffer, but doesn't deallocate buffer + return __first; + } + // Else not enough buffer, do in place + // __len >= 4 + _BidirectionalIterator __m = __first; + _Distance __len2 = __len / 2; // __len2 >= 2 + _VSTD::advance(__m, __len2); + // recurse on [__first, __m-1], except reduce __m-1 until *(__m-1) is true, *__first know to be false + // F????????????????T + // f m l + _BidirectionalIterator __m1 = __m; + _BidirectionalIterator __first_false = __first; + _Distance __len_half = __len2; + while (!__pred(*--__m1)) + { + if (__m1 == __first) + goto __first_half_done; + --__len_half; + } + // F???TFFF?????????T + // f m1 m l + typedef typename add_lvalue_reference<_Predicate>::type _PredRef; + __first_false = _VSTD::__stable_partition<_PredRef>(__first, __m1, __pred, __len_half, __p, __bit); +__first_half_done: + // TTTFFFFF?????????T + // f ff m l + // recurse on [__m, __last], except increase __m until *(__m) is false, *__last know to be true + __m1 = __m; + _BidirectionalIterator __second_false = __last; + ++__second_false; + __len_half = __len - __len2; + while (__pred(*__m1)) + { + if (++__m1 == __last) + goto __second_half_done; + --__len_half; + } + // TTTFFFFFTTTF?????T + // f ff m m1 l + __second_false = _VSTD::__stable_partition<_PredRef>(__m1, __last, __pred, __len_half, __p, __bit); +__second_half_done: + // TTTFFFFFTTTTTFFFFF + // f ff m sf l + return _VSTD::rotate(__first_false, __m, __second_false); + // TTTTTTTTFFFFFFFFFF + // | +} + +template +_BidirectionalIterator +__stable_partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, + bidirectional_iterator_tag) +{ + typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; + typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; + const difference_type __alloc_limit = 4; // might want to make this a function of trivial assignment + // Either prove all true and return __first or point to first false + while (true) + { + if (__first == __last) + return __first; + if (!__pred(*__first)) + break; + ++__first; + } + // __first points to first false, everything prior to __first is already set. + // Either prove [__first, __last) is all false and return __first, or point __last to last true + do + { + if (__first == --__last) + return __first; + } while (!__pred(*__last)); + // We now have a reduced range [__first, __last] + // *__first is known to be false + // *__last is known to be true + // __len >= 2 + difference_type __len = _VSTD::distance(__first, __last) + 1; + pair __p(0, 0); + unique_ptr __h; + if (__len >= __alloc_limit) + { + __p = _VSTD::get_temporary_buffer(__len); + __h.reset(__p.first); + } + return _VSTD::__stable_partition::type> + (__first, __last, __pred, __len, __p, bidirectional_iterator_tag()); +} + +template +inline _LIBCPP_INLINE_VISIBILITY +_ForwardIterator +stable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) +{ + return _VSTD::__stable_partition::type> + (__first, __last, __pred, typename iterator_traits<_ForwardIterator>::iterator_category()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_STABLE_PARTITION_H diff --git a/libcxx/include/__algorithm/stable_sort.h b/libcxx/include/__algorithm/stable_sort.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/stable_sort.h @@ -0,0 +1,232 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_STABLE_SORT_H +#define _LIBCPP___ALGORITHM_STABLE_SORT_H + +#include <__config> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/sort.h> +#include <__algorithm/inplace_merge.h> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +void +__merge_move_construct(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, + typename iterator_traits<_InputIterator1>::value_type* __result, _Compare __comp) +{ + typedef typename iterator_traits<_InputIterator1>::value_type value_type; + __destruct_n __d(0); + unique_ptr __h(__result, __d); + for (; true; ++__result) + { + if (__first1 == __last1) + { + for (; __first2 != __last2; ++__first2, ++__result, (void)__d.template __incr()) + ::new ((void*)__result) value_type(_VSTD::move(*__first2)); + __h.release(); + return; + } + if (__first2 == __last2) + { + for (; __first1 != __last1; ++__first1, ++__result, (void)__d.template __incr()) + ::new ((void*)__result) value_type(_VSTD::move(*__first1)); + __h.release(); + return; + } + if (__comp(*__first2, *__first1)) + { + ::new ((void*)__result) value_type(_VSTD::move(*__first2)); + __d.template __incr(); + ++__first2; + } + else + { + ::new ((void*)__result) value_type(_VSTD::move(*__first1)); + __d.template __incr(); + ++__first1; + } + } +} + +template +void +__merge_move_assign(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _InputIterator2 __last2, + _OutputIterator __result, _Compare __comp) +{ + for (; __first1 != __last1; ++__result) + { + if (__first2 == __last2) + { + for (; __first1 != __last1; ++__first1, (void) ++__result) + *__result = _VSTD::move(*__first1); + return; + } + if (__comp(*__first2, *__first1)) + { + *__result = _VSTD::move(*__first2); + ++__first2; + } + else + { + *__result = _VSTD::move(*__first1); + ++__first1; + } + } + for (; __first2 != __last2; ++__first2, (void) ++__result) + *__result = _VSTD::move(*__first2); +} + +template +void +__stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, + typename iterator_traits<_RandomAccessIterator>::difference_type __len, + typename iterator_traits<_RandomAccessIterator>::value_type* __buff, ptrdiff_t __buff_size); + +template +void +__stable_sort_move(_RandomAccessIterator __first1, _RandomAccessIterator __last1, _Compare __comp, + typename iterator_traits<_RandomAccessIterator>::difference_type __len, + typename iterator_traits<_RandomAccessIterator>::value_type* __first2) +{ + typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; + switch (__len) + { + case 0: + return; + case 1: + ::new ((void*)__first2) value_type(_VSTD::move(*__first1)); + return; + case 2: + __destruct_n __d(0); + unique_ptr __h2(__first2, __d); + if (__comp(*--__last1, *__first1)) + { + ::new ((void*)__first2) value_type(_VSTD::move(*__last1)); + __d.template __incr(); + ++__first2; + ::new ((void*)__first2) value_type(_VSTD::move(*__first1)); + } + else + { + ::new ((void*)__first2) value_type(_VSTD::move(*__first1)); + __d.template __incr(); + ++__first2; + ::new ((void*)__first2) value_type(_VSTD::move(*__last1)); + } + __h2.release(); + return; + } + if (__len <= 8) + { + _VSTD::__insertion_sort_move<_Compare>(__first1, __last1, __first2, __comp); + return; + } + typename iterator_traits<_RandomAccessIterator>::difference_type __l2 = __len / 2; + _RandomAccessIterator __m = __first1 + __l2; + _VSTD::__stable_sort<_Compare>(__first1, __m, __comp, __l2, __first2, __l2); + _VSTD::__stable_sort<_Compare>(__m, __last1, __comp, __len - __l2, __first2 + __l2, __len - __l2); + _VSTD::__merge_move_construct<_Compare>(__first1, __m, __m, __last1, __first2, __comp); +} + +template +struct __stable_sort_switch +{ + static const unsigned value = 128*is_trivially_copy_assignable<_Tp>::value; +}; + +template +void +__stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, + typename iterator_traits<_RandomAccessIterator>::difference_type __len, + typename iterator_traits<_RandomAccessIterator>::value_type* __buff, ptrdiff_t __buff_size) +{ + typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + switch (__len) + { + case 0: + case 1: + return; + case 2: + if (__comp(*--__last, *__first)) + swap(*__first, *__last); + return; + } + if (__len <= static_cast(__stable_sort_switch::value)) + { + _VSTD::__insertion_sort<_Compare>(__first, __last, __comp); + return; + } + typename iterator_traits<_RandomAccessIterator>::difference_type __l2 = __len / 2; + _RandomAccessIterator __m = __first + __l2; + if (__len <= __buff_size) + { + __destruct_n __d(0); + unique_ptr __h2(__buff, __d); + _VSTD::__stable_sort_move<_Compare>(__first, __m, __comp, __l2, __buff); + __d.__set(__l2, (value_type*)nullptr); + _VSTD::__stable_sort_move<_Compare>(__m, __last, __comp, __len - __l2, __buff + __l2); + __d.__set(__len, (value_type*)nullptr); + _VSTD::__merge_move_assign<_Compare>(__buff, __buff + __l2, __buff + __l2, __buff + __len, __first, __comp); +// _VSTD::__merge<_Compare>(move_iterator(__buff), +// move_iterator(__buff + __l2), +// move_iterator<_RandomAccessIterator>(__buff + __l2), +// move_iterator<_RandomAccessIterator>(__buff + __len), +// __first, __comp); + return; + } + _VSTD::__stable_sort<_Compare>(__first, __m, __comp, __l2, __buff, __buff_size); + _VSTD::__stable_sort<_Compare>(__m, __last, __comp, __len - __l2, __buff, __buff_size); + _VSTD::__inplace_merge<_Compare>(__first, __m, __last, __comp, __l2, __len - __l2, __buff, __buff_size); +} + +template +inline _LIBCPP_INLINE_VISIBILITY +void +stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) +{ + typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; + typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; + difference_type __len = __last - __first; + pair __buf(0, 0); + unique_ptr __h; + if (__len > static_cast(__stable_sort_switch::value)) + { + __buf = _VSTD::get_temporary_buffer(__len); + __h.reset(__buf.first); + } + typedef typename __comp_ref_type<_Compare>::type _Comp_ref; + _VSTD::__stable_sort<_Comp_ref>(__first, __last, __comp, __len, __buf.first, __buf.second); +} + +template +inline _LIBCPP_INLINE_VISIBILITY +void +stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last) +{ + _VSTD::stable_sort(__first, __last, __less::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_STABLE_SORT_H diff --git a/libcxx/include/__algorithm/transform.h b/libcxx/include/__algorithm/transform.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/transform.h @@ -0,0 +1,48 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_TRANSFORM_H +#define _LIBCPP___ALGORITHM_TRANSFORM_H + +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +transform(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _UnaryOperation __op) +{ + for (; __first != __last; ++__first, (void) ++__result) + *__result = __op(*__first); + return __result; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +transform(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, + _OutputIterator __result, _BinaryOperation __binary_op) +{ + for (; __first1 != __last1; ++__first1, (void) ++__first2, ++__result) + *__result = __binary_op(*__first1, *__first2); + return __result; +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_TRANSFORM_H diff --git a/libcxx/include/__algorithm/uniform_int_distribution.h b/libcxx/include/__algorithm/uniform_int_distribution.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/uniform_int_distribution.h @@ -0,0 +1,282 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_UNIFORM_INT_DISTRIBUTION_H +#define _LIBCPP___ALGORITHM_UNIFORM_INT_DISTRIBUTION_H + +#include <__config> +#include +#include +#include +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// __independent_bits_engine + +template +struct __log2_imp +{ + static const size_t value = _Xp & ((unsigned long long)(1) << _Rp) ? _Rp + : __log2_imp<_Xp, _Rp - 1>::value; +}; + +template +struct __log2_imp<_Xp, 0> +{ + static const size_t value = 0; +}; + +template +struct __log2_imp<0, _Rp> +{ + static const size_t value = _Rp + 1; +}; + +template +struct __log2 +{ + static const size_t value = __log2_imp<_Xp, + sizeof(_UIntType) * __CHAR_BIT__ - 1>::value; +}; + +template +class __independent_bits_engine +{ +public: + // types + typedef _UIntType result_type; + +private: + typedef typename _Engine::result_type _Engine_result_type; + typedef typename conditional + < + sizeof(_Engine_result_type) <= sizeof(result_type), + result_type, + _Engine_result_type + >::type _Working_result_type; + + _Engine& __e_; + size_t __w_; + size_t __w0_; + size_t __n_; + size_t __n0_; + _Working_result_type __y0_; + _Working_result_type __y1_; + _Engine_result_type __mask0_; + _Engine_result_type __mask1_; + +#ifdef _LIBCPP_CXX03_LANG + static const _Working_result_type _Rp = _Engine::_Max - _Engine::_Min + + _Working_result_type(1); +#else + static _LIBCPP_CONSTEXPR const _Working_result_type _Rp = _Engine::max() - _Engine::min() + + _Working_result_type(1); +#endif + static _LIBCPP_CONSTEXPR const size_t __m = __log2<_Working_result_type, _Rp>::value; + static _LIBCPP_CONSTEXPR const size_t _WDt = numeric_limits<_Working_result_type>::digits; + static _LIBCPP_CONSTEXPR const size_t _EDt = numeric_limits<_Engine_result_type>::digits; + +public: + // constructors and seeding functions + __independent_bits_engine(_Engine& __e, size_t __w); + + // generating functions + result_type operator()() {return __eval(integral_constant());} + +private: + result_type __eval(false_type); + result_type __eval(true_type); +}; + +template +__independent_bits_engine<_Engine, _UIntType> + ::__independent_bits_engine(_Engine& __e, size_t __w) + : __e_(__e), + __w_(__w) +{ + __n_ = __w_ / __m + (__w_ % __m != 0); + __w0_ = __w_ / __n_; + if (_Rp == 0) + __y0_ = _Rp; + else if (__w0_ < _WDt) + __y0_ = (_Rp >> __w0_) << __w0_; + else + __y0_ = 0; + if (_Rp - __y0_ > __y0_ / __n_) + { + ++__n_; + __w0_ = __w_ / __n_; + if (__w0_ < _WDt) + __y0_ = (_Rp >> __w0_) << __w0_; + else + __y0_ = 0; + } + __n0_ = __n_ - __w_ % __n_; + if (__w0_ < _WDt - 1) + __y1_ = (_Rp >> (__w0_ + 1)) << (__w0_ + 1); + else + __y1_ = 0; + __mask0_ = __w0_ > 0 ? _Engine_result_type(~0) >> (_EDt - __w0_) : + _Engine_result_type(0); + __mask1_ = __w0_ < _EDt - 1 ? + _Engine_result_type(~0) >> (_EDt - (__w0_ + 1)) : + _Engine_result_type(~0); +} + +template +inline +_UIntType +__independent_bits_engine<_Engine, _UIntType>::__eval(false_type) +{ + return static_cast(__e_() & __mask0_); +} + +template +_UIntType +__independent_bits_engine<_Engine, _UIntType>::__eval(true_type) +{ + const size_t _WRt = numeric_limits::digits; + result_type _Sp = 0; + for (size_t __k = 0; __k < __n0_; ++__k) + { + _Engine_result_type __u; + do + { + __u = __e_() - _Engine::min(); + } while (__u >= __y0_); + if (__w0_ < _WRt) + _Sp <<= __w0_; + else + _Sp = 0; + _Sp += __u & __mask0_; + } + for (size_t __k = __n0_; __k < __n_; ++__k) + { + _Engine_result_type __u; + do + { + __u = __e_() - _Engine::min(); + } while (__u >= __y1_); + if (__w0_ < _WRt - 1) + _Sp <<= __w0_ + 1; + else + _Sp = 0; + _Sp += __u & __mask1_; + } + return _Sp; +} + +template +class uniform_int_distribution +{ +public: + // types + typedef _IntType result_type; + + class param_type + { + result_type __a_; + result_type __b_; + public: + typedef uniform_int_distribution distribution_type; + + explicit param_type(result_type __a = 0, + result_type __b = numeric_limits::max()) + : __a_(__a), __b_(__b) {} + + result_type a() const {return __a_;} + result_type b() const {return __b_;} + + friend bool operator==(const param_type& __x, const param_type& __y) + {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} + friend bool operator!=(const param_type& __x, const param_type& __y) + {return !(__x == __y);} + }; + +private: + param_type __p_; + +public: + // constructors and reset functions +#ifndef _LIBCPP_CXX03_LANG + uniform_int_distribution() : uniform_int_distribution(0) {} + explicit uniform_int_distribution( + result_type __a, result_type __b = numeric_limits::max()) + : __p_(param_type(__a, __b)) {} +#else + explicit uniform_int_distribution( + result_type __a = 0, + result_type __b = numeric_limits::max()) + : __p_(param_type(__a, __b)) {} +#endif + explicit uniform_int_distribution(const param_type& __p) : __p_(__p) {} + void reset() {} + + // generating functions + template result_type operator()(_URNG& __g) + {return (*this)(__g, __p_);} + template result_type operator()(_URNG& __g, const param_type& __p); + + // property functions + result_type a() const {return __p_.a();} + result_type b() const {return __p_.b();} + + param_type param() const {return __p_;} + void param(const param_type& __p) {__p_ = __p;} + + result_type min() const {return a();} + result_type max() const {return b();} + + friend bool operator==(const uniform_int_distribution& __x, + const uniform_int_distribution& __y) + {return __x.__p_ == __y.__p_;} + friend bool operator!=(const uniform_int_distribution& __x, + const uniform_int_distribution& __y) + {return !(__x == __y);} +}; + +template +template +typename uniform_int_distribution<_IntType>::result_type +uniform_int_distribution<_IntType>::operator()(_URNG& __g, const param_type& __p) +_LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK +{ + typedef typename conditional::type _UIntType; + const _UIntType _Rp = _UIntType(__p.b()) - _UIntType(__p.a()) + _UIntType(1); + if (_Rp == 1) + return __p.a(); + const size_t _Dt = numeric_limits<_UIntType>::digits; + typedef __independent_bits_engine<_URNG, _UIntType> _Eng; + if (_Rp == 0) + return static_cast(_Eng(__g, _Dt)()); + size_t __w = _Dt - __libcpp_clz(_Rp) - 1; + if ((_Rp & (numeric_limits<_UIntType>::max() >> (_Dt - __w))) != 0) + ++__w; + _Eng __e(__g, __w); + _UIntType __u; + do + { + __u = __e(); + } while (__u >= _Rp); + return static_cast(__u + __p.a()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_UNIFORM_INT_DISTRIBUTION_H diff --git a/libcxx/include/__algorithm/unique.h b/libcxx/include/__algorithm/unique.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/unique.h @@ -0,0 +1,145 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_UNIQUE_H +#define _LIBCPP___ALGORITHM_UNIQUE_H + +#include <__config> +#include <__algorithm/adjacent_find.h> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// unique + +template +_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +unique(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) +{ + __first = _VSTD::adjacent_find<_ForwardIterator, typename add_lvalue_reference<_BinaryPredicate>::type> + (__first, __last, __pred); + if (__first != __last) + { + // ... a a ? ... + // f i + _ForwardIterator __i = __first; + for (++__i; ++__i != __last;) + if (!__pred(*__first, *__i)) + *++__first = _VSTD::move(*__i); + ++__first; + } + return __first; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_ForwardIterator +unique(_ForwardIterator __first, _ForwardIterator __last) +{ + typedef typename iterator_traits<_ForwardIterator>::value_type __v; + return _VSTD::unique(__first, __last, __equal_to<__v>()); +} + +// unique_copy + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator +__unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred, + input_iterator_tag, output_iterator_tag) +{ + if (__first != __last) + { + typename iterator_traits<_InputIterator>::value_type __t(*__first); + *__result = __t; + ++__result; + while (++__first != __last) + { + if (!__pred(__t, *__first)) + { + __t = *__first; + *__result = __t; + ++__result; + } + } + } + return __result; +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator +__unique_copy(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, _BinaryPredicate __pred, + forward_iterator_tag, output_iterator_tag) +{ + if (__first != __last) + { + _ForwardIterator __i = __first; + *__result = *__i; + ++__result; + while (++__first != __last) + { + if (!__pred(*__i, *__first)) + { + *__result = *__first; + ++__result; + __i = __first; + } + } + } + return __result; +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +__unique_copy(_InputIterator __first, _InputIterator __last, _ForwardIterator __result, _BinaryPredicate __pred, + input_iterator_tag, forward_iterator_tag) +{ + if (__first != __last) + { + *__result = *__first; + while (++__first != __last) + if (!__pred(*__result, *__first)) + *++__result = *__first; + ++__result; + } + return __result; +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) +{ + return _VSTD::__unique_copy::type> + (__first, __last, __result, __pred, + typename iterator_traits<_InputIterator>::iterator_category(), + typename iterator_traits<_OutputIterator>::iterator_category()); +} + +template +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_OutputIterator +unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) +{ + typedef typename iterator_traits<_InputIterator>::value_type __v; + return _VSTD::unique_copy(__first, __last, __result, __equal_to<__v>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_UNIQUE_H diff --git a/libcxx/include/__algorithm/unwrap_iter.h b/libcxx/include/__algorithm/unwrap_iter.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/unwrap_iter.h @@ -0,0 +1,87 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_UNWRAP_ITER_H +#define _LIBCPP___ALGORITHM_UNWRAP_ITER_H + +#include <__config> +#include +#include <__memory/pointer_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +// The job of __unwrap_iter is to lower contiguous iterators (such as +// vector::iterator) into pointers, to reduce the number of template +// instantiations and to enable pointer-based optimizations e.g. in std::copy. +// For iterators that are not contiguous, it must be a no-op. +// In debug mode, we don't do this. +// +// __unwrap_iter is non-constexpr for user-defined iterators whose +// `to_address` and/or `operator->` is non-constexpr. This is okay; but we +// try to avoid doing __unwrap_iter in constant-evaluated contexts anyway. +// +// Some algorithms (e.g. std::copy, but not std::sort) need to convert an +// "unwrapped" result back into a contiguous iterator. Since contiguous iterators +// are random-access, we can do this portably using iterator arithmetic; this +// is the job of __rewrap_iter. + +template ::value> +struct __unwrap_iter_impl { + static _LIBCPP_CONSTEXPR _Iter + __apply(_Iter __i) _NOEXCEPT { + return __i; + } +}; + +#if _LIBCPP_DEBUG_LEVEL < 2 + +template +struct __unwrap_iter_impl<_Iter, true> { + static _LIBCPP_CONSTEXPR decltype(_VSTD::__to_address(declval<_Iter>())) + __apply(_Iter __i) _NOEXCEPT { + return _VSTD::__to_address(__i); + } +}; + +#endif // _LIBCPP_DEBUG_LEVEL < 2 + +template > +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR +decltype(_Impl::__apply(declval<_Iter>())) +__unwrap_iter(_Iter __i) _NOEXCEPT +{ + return _Impl::__apply(__i); +} + +template +_OrigIter __rewrap_iter(_OrigIter, _OrigIter __result) +{ + return __result; +} + +template +_OrigIter __rewrap_iter(_OrigIter __first, _UnwrappedIter __result) +{ + // Precondition: __result is reachable from __first + // Precondition: _OrigIter is a contiguous iterator + return __first + (__result - _VSTD::__unwrap_iter(__first)); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_UNWRAP_ITER_H diff --git a/libcxx/include/__algorithm/upper_bound.h b/libcxx/include/__algorithm/upper_bound.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__algorithm/upper_bound.h @@ -0,0 +1,71 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___ALGORITHM_UPPER_BOUND_H +#define _LIBCPP___ALGORITHM_UPPER_BOUND_H + +#include <__config> +#include <__algorithm/half_positive.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator +__upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) +{ + typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; + difference_type __len = _VSTD::distance(__first, __last); + while (__len != 0) + { + difference_type __l2 = _VSTD::__half_positive(__len); + _ForwardIterator __m = __first; + _VSTD::advance(__m, __l2); + if (__comp(__value_, *__m)) + __len = __l2; + else + { + __first = ++__m; + __len -= __l2 + 1; + } + } + return __first; +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_ForwardIterator +upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) +{ + typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; + return _VSTD::__upper_bound<_Comp_ref>(__first, __last, __value_, __comp); +} + +template +_LIBCPP_NODISCARD_EXT inline +_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 +_ForwardIterator +upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) +{ + return _VSTD::upper_bound(__first, __last, __value_, + __less<_Tp, typename iterator_traits<_ForwardIterator>::value_type>()); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___ALGORITHM_UPPER_BOUND_H diff --git a/libcxx/include/__functional/search.h b/libcxx/include/__functional/search.h new file mode 100644 --- /dev/null +++ b/libcxx/include/__functional/search.h @@ -0,0 +1,102 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FUNCTIONAL___SEARCH_H +#define _LIBCPP___FUNCTIONAL___SEARCH_H + +#include <__config> +#include <__iterator/iterator_traits.h> +#include + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template +pair<_ForwardIterator1, _ForwardIterator1> + _LIBCPP_CONSTEXPR_AFTER_CXX11 __search(_ForwardIterator1 __first1, _ForwardIterator1 __last1, + _ForwardIterator2 __first2, _ForwardIterator2 __last2, + _BinaryPredicate __pred, forward_iterator_tag, forward_iterator_tag) { + if (__first2 == __last2) + return _VSTD::make_pair(__first1, __first1); // Everything matches an empty sequence + while (true) { + // Find first element in sequence 1 that matchs *__first2, with a mininum of loop checks + while (true) { + if (__first1 == __last1) // return __last1 if no element matches *__first2 + return _VSTD::make_pair(__last1, __last1); + if (__pred(*__first1, *__first2)) + break; + ++__first1; + } + // *__first1 matches *__first2, now match elements after here + _ForwardIterator1 __m1 = __first1; + _ForwardIterator2 __m2 = __first2; + while (true) { + if (++__m2 == __last2) // If pattern exhausted, __first1 is the answer (works for 1 element pattern) + return _VSTD::make_pair(__first1, __m1); + if (++__m1 == __last1) // Otherwise if source exhaused, pattern not found + return _VSTD::make_pair(__last1, __last1); + if (!__pred(*__m1, *__m2)) // if there is a mismatch, restart with a new __first1 + { + ++__first1; + break; + } // else there is a match, check next elements + } + } +} + +template +_LIBCPP_CONSTEXPR_AFTER_CXX11 pair<_RandomAccessIterator1, _RandomAccessIterator1> +__search(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, _RandomAccessIterator2 __first2, + _RandomAccessIterator2 __last2, _BinaryPredicate __pred, random_access_iterator_tag, + random_access_iterator_tag) { + typedef typename iterator_traits<_RandomAccessIterator1>::difference_type _D1; + typedef typename iterator_traits<_RandomAccessIterator2>::difference_type _D2; + // Take advantage of knowing source and pattern lengths. Stop short when source is smaller than pattern + const _D2 __len2 = __last2 - __first2; + if (__len2 == 0) + return _VSTD::make_pair(__first1, __first1); + const _D1 __len1 = __last1 - __first1; + if (__len1 < __len2) + return _VSTD::make_pair(__last1, __last1); + const _RandomAccessIterator1 __s = __last1 - (__len2 - 1); // Start of pattern match can't go beyond here + + while (true) { + while (true) { + if (__first1 == __s) + return _VSTD::make_pair(__last1, __last1); + if (__pred(*__first1, *__first2)) + break; + ++__first1; + } + + _RandomAccessIterator1 __m1 = __first1; + _RandomAccessIterator2 __m2 = __first2; + while (true) { + if (++__m2 == __last2) + return _VSTD::make_pair(__first1, __first1 + __len2); + ++__m1; // no need to check range on __m1 because __s guarantees we have enough source + if (!__pred(*__m1, *__m2)) { + ++__first1; + break; + } + } + } +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___FUNCTIONAL___SEARCH_H diff --git a/libcxx/include/__memory/temporary_buffer.h b/libcxx/include/__memory/temporary_buffer.h --- a/libcxx/include/__memory/temporary_buffer.h +++ b/libcxx/include/__memory/temporary_buffer.h @@ -76,6 +76,12 @@ _VSTD::__libcpp_deallocate_unsized((void*)__p, _LIBCPP_ALIGNOF(_Tp)); } +struct __return_temporary_buffer +{ + template + _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) const {_VSTD::return_temporary_buffer(__p);} +}; + _LIBCPP_END_NAMESPACE_STD _LIBCPP_POP_MACROS diff --git a/libcxx/include/algorithm b/libcxx/include/algorithm --- a/libcxx/include/algorithm +++ b/libcxx/include/algorithm @@ -646,18 +646,93 @@ */ #include <__config> +#include <__debug> #include <__bits> // __libcpp_clz #include #include #include #include +#include // needed to provide swap_ranges. +#include #include #include #include #include // swap_ranges #include -#include <__debug> +#include <__algorithm/adjacent_find.h> +#include <__algorithm/all_of.h> +#include <__algorithm/any_of.h> +#include <__algorithm/binary_search.h> +#include <__algorithm/clamp.h> +#include <__algorithm/comp.h> +#include <__algorithm/comp_ref_type.h> +#include <__algorithm/copy.h> +#include <__algorithm/count.h> +#include <__algorithm/count_if.h> +#include <__algorithm/equal.h> +#include <__algorithm/equal_range.h> +#include <__algorithm/fill.h> +#include <__algorithm/find.h> +#include <__algorithm/find_end.h> +#include <__algorithm/find_first_of.h> +#include <__algorithm/find_if.h> +#include <__algorithm/find_if_not.h> +#include <__algorithm/for_each.h> +#include <__algorithm/for_each_n.h> +#include <__algorithm/generate.h> +#include <__algorithm/half_positive.h> +#include <__algorithm/includes.h> +#include <__algorithm/inplace_merge.h> +#include <__algorithm/is_heap.h> +#include <__algorithm/is_heap_until.h> +#include <__algorithm/is_partitioned.h> +#include <__algorithm/is_permutation.h> +#include <__algorithm/is_sorted.h> +#include <__algorithm/lexicographical_compare.h> +#include <__algorithm/lower_bound.h> +#include <__algorithm/make_heap.h> +#include <__algorithm/max.h> +#include <__algorithm/max_element.h> +#include <__algorithm/merge.h> +#include <__algorithm/min.h> +#include <__algorithm/min_element.h> +#include <__algorithm/minmax.h> +#include <__algorithm/minmax_element.h> +#include <__algorithm/mismatch.h> +#include <__algorithm/move.h> +#include <__algorithm/next_permutation.h> +#include <__algorithm/none_of.h> +#include <__algorithm/nth_element.h> +#include <__algorithm/partial_sort.h> +#include <__algorithm/partition.h> +#include <__algorithm/partition_point.h> +#include <__algorithm/pop_heap.h> +#include <__algorithm/prev_permutation.h> +#include <__algorithm/push_heap.h> +#include <__algorithm/remove.h> +#include <__algorithm/replace.h> +#include <__algorithm/reverse.h> +#include <__algorithm/rotate.h> +#include <__algorithm/sample.h> +#include <__algorithm/search.h> +#include <__algorithm/search_n.h> +#include <__algorithm/set_difference.h> +#include <__algorithm/set_intersection.h> +#include <__algorithm/set_symmetric_difference.h> +#include <__algorithm/set_union.h> +#include <__algorithm/shift.h> +#include <__algorithm/shuffle.h> +#include <__algorithm/sift_down.h> +#include <__algorithm/sort.h> +#include <__algorithm/sort_heap.h> +#include <__algorithm/stable_partition.h> +#include <__algorithm/stable_sort.h> +#include <__algorithm/transform.h> +#include <__algorithm/uniform_int_distribution.h> +#include <__algorithm/unique.h> +#include <__algorithm/unwrap_iter.h> +#include <__algorithm/upper_bound.h> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) #pragma GCC system_header @@ -666,5192 +741,6 @@ _LIBCPP_PUSH_MACROS #include <__undef_macros> - -_LIBCPP_BEGIN_NAMESPACE_STD - -// I'd like to replace these with _VSTD::equal_to, but can't because: -// * That only works with C++14 and later, and -// * We haven't included here. -template -struct __equal_to -{ - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 bool operator()(const _T1& __x, const _T2& __y) const {return __x == __y;} - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 bool operator()(const _T2& __x, const _T1& __y) const {return __x == __y;} - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 bool operator()(const _T2& __x, const _T2& __y) const {return __x == __y;} -}; - -template -struct __equal_to<_T1, _T1> -{ - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 - bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} -}; - -template -struct __equal_to -{ - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 - bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} -}; - -template -struct __equal_to<_T1, const _T1> -{ - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 - bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} -}; - -template -struct __less -{ - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 - bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} - - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 - bool operator()(const _T1& __x, const _T2& __y) const {return __x < __y;} - - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 - bool operator()(const _T2& __x, const _T1& __y) const {return __x < __y;} - - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 - bool operator()(const _T2& __x, const _T2& __y) const {return __x < __y;} -}; - -template -struct __less<_T1, _T1> -{ - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 - bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} -}; - -template -struct __less -{ - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 - bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} -}; - -template -struct __less<_T1, const _T1> -{ - _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 - bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} -}; - -template -class __invert // invert the sense of a comparison -{ -private: - _Predicate __p_; -public: - _LIBCPP_INLINE_VISIBILITY __invert() {} - - _LIBCPP_INLINE_VISIBILITY - explicit __invert(_Predicate __p) : __p_(__p) {} - - template - _LIBCPP_INLINE_VISIBILITY - bool operator()(const _T1& __x) {return !__p_(__x);} - - template - _LIBCPP_INLINE_VISIBILITY - bool operator()(const _T1& __x, const _T2& __y) {return __p_(__y, __x);} -}; - -// Perform division by two quickly for positive integers (llvm.org/PR39129) - -template -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR -typename enable_if -< - is_integral<_Integral>::value, - _Integral ->::type -__half_positive(_Integral __value) -{ - return static_cast<_Integral>(static_cast::type>(__value) / 2); -} - -template -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR -typename enable_if -< - !is_integral<_Tp>::value, - _Tp ->::type -__half_positive(_Tp __value) -{ - return __value / 2; -} - -#ifdef _LIBCPP_DEBUG - -template -struct __debug_less -{ - _Compare &__comp_; - _LIBCPP_CONSTEXPR_AFTER_CXX17 - __debug_less(_Compare& __c) : __comp_(__c) {} - - template - _LIBCPP_CONSTEXPR_AFTER_CXX17 - bool operator()(const _Tp& __x, const _Up& __y) - { - bool __r = __comp_(__x, __y); - if (__r) - __do_compare_assert(0, __y, __x); - return __r; - } - - template - _LIBCPP_CONSTEXPR_AFTER_CXX17 - bool operator()(_Tp& __x, _Up& __y) - { - bool __r = __comp_(__x, __y); - if (__r) - __do_compare_assert(0, __y, __x); - return __r; - } - - template - _LIBCPP_CONSTEXPR_AFTER_CXX17 - inline _LIBCPP_INLINE_VISIBILITY - decltype((void)declval<_Compare&>()( - declval<_LHS &>(), declval<_RHS &>())) - __do_compare_assert(int, _LHS & __l, _RHS & __r) { - _LIBCPP_ASSERT(!__comp_(__l, __r), - "Comparator does not induce a strict weak ordering"); - } - - template - _LIBCPP_CONSTEXPR_AFTER_CXX17 - inline _LIBCPP_INLINE_VISIBILITY - void __do_compare_assert(long, _LHS &, _RHS &) {} -}; - -#endif // _LIBCPP_DEBUG - -template -struct __comp_ref_type { - // Pass the comparator by lvalue reference. Or in debug mode, using a - // debugging wrapper that stores a reference. -#ifndef _LIBCPP_DEBUG - typedef typename add_lvalue_reference<_Comp>::type type; -#else - typedef __debug_less<_Comp> type; -#endif -}; - -// all_of - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -all_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) -{ - for (; __first != __last; ++__first) - if (!__pred(*__first)) - return false; - return true; -} - -// any_of - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -any_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) -{ - for (; __first != __last; ++__first) - if (__pred(*__first)) - return true; - return false; -} - -// none_of - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -none_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) -{ - for (; __first != __last; ++__first) - if (__pred(*__first)) - return false; - return true; -} - -// for_each - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_Function -for_each(_InputIterator __first, _InputIterator __last, _Function __f) -{ - for (; __first != __last; ++__first) - __f(*__first); - return __f; -} - -#if _LIBCPP_STD_VER > 14 -// for_each_n - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_InputIterator -for_each_n(_InputIterator __first, _Size __orig_n, _Function __f) -{ - typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; - _IntegralSize __n = __orig_n; - while (__n > 0) - { - __f(*__first); - ++__first; - --__n; - } - return __first; -} -#endif - -// find - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_InputIterator -find(_InputIterator __first, _InputIterator __last, const _Tp& __value_) -{ - for (; __first != __last; ++__first) - if (*__first == __value_) - break; - return __first; -} - -// find_if - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_InputIterator -find_if(_InputIterator __first, _InputIterator __last, _Predicate __pred) -{ - for (; __first != __last; ++__first) - if (__pred(*__first)) - break; - return __first; -} - -// find_if_not - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_InputIterator -find_if_not(_InputIterator __first, _InputIterator __last, _Predicate __pred) -{ - for (; __first != __last; ++__first) - if (!__pred(*__first)) - break; - return __first; -} - -// find_end - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator1 -__find_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred, - forward_iterator_tag, forward_iterator_tag) -{ - // modeled after search algorithm - _ForwardIterator1 __r = __last1; // __last1 is the "default" answer - if (__first2 == __last2) - return __r; - while (true) - { - while (true) - { - if (__first1 == __last1) // if source exhausted return last correct answer - return __r; // (or __last1 if never found) - if (__pred(*__first1, *__first2)) - break; - ++__first1; - } - // *__first1 matches *__first2, now match elements after here - _ForwardIterator1 __m1 = __first1; - _ForwardIterator2 __m2 = __first2; - while (true) - { - if (++__m2 == __last2) - { // Pattern exhaused, record answer and search for another one - __r = __first1; - ++__first1; - break; - } - if (++__m1 == __last1) // Source exhausted, return last answer - return __r; - if (!__pred(*__m1, *__m2)) // mismatch, restart with a new __first - { - ++__first1; - break; - } // else there is a match, check next elements - } - } -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _BidirectionalIterator1 -__find_end(_BidirectionalIterator1 __first1, _BidirectionalIterator1 __last1, - _BidirectionalIterator2 __first2, _BidirectionalIterator2 __last2, _BinaryPredicate __pred, - bidirectional_iterator_tag, bidirectional_iterator_tag) -{ - // modeled after search algorithm (in reverse) - if (__first2 == __last2) - return __last1; // Everything matches an empty sequence - _BidirectionalIterator1 __l1 = __last1; - _BidirectionalIterator2 __l2 = __last2; - --__l2; - while (true) - { - // Find last element in sequence 1 that matchs *(__last2-1), with a mininum of loop checks - while (true) - { - if (__first1 == __l1) // return __last1 if no element matches *__first2 - return __last1; - if (__pred(*--__l1, *__l2)) - break; - } - // *__l1 matches *__l2, now match elements before here - _BidirectionalIterator1 __m1 = __l1; - _BidirectionalIterator2 __m2 = __l2; - while (true) - { - if (__m2 == __first2) // If pattern exhausted, __m1 is the answer (works for 1 element pattern) - return __m1; - if (__m1 == __first1) // Otherwise if source exhaused, pattern not found - return __last1; - if (!__pred(*--__m1, *--__m2)) // if there is a mismatch, restart with a new __l1 - { - break; - } // else there is a match, check next elements - } - } -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 _RandomAccessIterator1 -__find_end(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, - _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _BinaryPredicate __pred, - random_access_iterator_tag, random_access_iterator_tag) -{ - // Take advantage of knowing source and pattern lengths. Stop short when source is smaller than pattern - typename iterator_traits<_RandomAccessIterator2>::difference_type __len2 = __last2 - __first2; - if (__len2 == 0) - return __last1; - typename iterator_traits<_RandomAccessIterator1>::difference_type __len1 = __last1 - __first1; - if (__len1 < __len2) - return __last1; - const _RandomAccessIterator1 __s = __first1 + (__len2 - 1); // End of pattern match can't go before here - _RandomAccessIterator1 __l1 = __last1; - _RandomAccessIterator2 __l2 = __last2; - --__l2; - while (true) - { - while (true) - { - if (__s == __l1) - return __last1; - if (__pred(*--__l1, *__l2)) - break; - } - _RandomAccessIterator1 __m1 = __l1; - _RandomAccessIterator2 __m2 = __l2; - while (true) - { - if (__m2 == __first2) - return __m1; - // no need to check range on __m1 because __s guarantees we have enough source - if (!__pred(*--__m1, *--__m2)) - { - break; - } - } - } -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator1 -find_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) -{ - return _VSTD::__find_end::type> - (__first1, __last1, __first2, __last2, __pred, - typename iterator_traits<_ForwardIterator1>::iterator_category(), - typename iterator_traits<_ForwardIterator2>::iterator_category()); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator1 -find_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2) -{ - typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; - typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; - return _VSTD::find_end(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); -} - -// find_first_of - -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 _ForwardIterator1 -__find_first_of_ce(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) -{ - for (; __first1 != __last1; ++__first1) - for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) - if (__pred(*__first1, *__j)) - return __first1; - return __last1; -} - - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator1 -find_first_of(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) -{ - return _VSTD::__find_first_of_ce(__first1, __last1, __first2, __last2, __pred); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator1 -find_first_of(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2) -{ - typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; - typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; - return _VSTD::__find_first_of_ce(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); -} - -// adjacent_find - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator -adjacent_find(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) -{ - if (__first != __last) - { - _ForwardIterator __i = __first; - while (++__i != __last) - { - if (__pred(*__first, *__i)) - return __first; - __first = __i; - } - } - return __last; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator -adjacent_find(_ForwardIterator __first, _ForwardIterator __last) -{ - typedef typename iterator_traits<_ForwardIterator>::value_type __v; - return _VSTD::adjacent_find(__first, __last, __equal_to<__v>()); -} - -// count - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -typename iterator_traits<_InputIterator>::difference_type -count(_InputIterator __first, _InputIterator __last, const _Tp& __value_) -{ - typename iterator_traits<_InputIterator>::difference_type __r(0); - for (; __first != __last; ++__first) - if (*__first == __value_) - ++__r; - return __r; -} - -// count_if - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -typename iterator_traits<_InputIterator>::difference_type -count_if(_InputIterator __first, _InputIterator __last, _Predicate __pred) -{ - typename iterator_traits<_InputIterator>::difference_type __r(0); - for (; __first != __last; ++__first) - if (__pred(*__first)) - ++__r; - return __r; -} - -// mismatch - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -pair<_InputIterator1, _InputIterator2> -mismatch(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _BinaryPredicate __pred) -{ - for (; __first1 != __last1; ++__first1, (void) ++__first2) - if (!__pred(*__first1, *__first2)) - break; - return pair<_InputIterator1, _InputIterator2>(__first1, __first2); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -pair<_InputIterator1, _InputIterator2> -mismatch(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) -{ - typedef typename iterator_traits<_InputIterator1>::value_type __v1; - typedef typename iterator_traits<_InputIterator2>::value_type __v2; - return _VSTD::mismatch(__first1, __last1, __first2, __equal_to<__v1, __v2>()); -} - -#if _LIBCPP_STD_VER > 11 -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -pair<_InputIterator1, _InputIterator2> -mismatch(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, - _BinaryPredicate __pred) -{ - for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void) ++__first2) - if (!__pred(*__first1, *__first2)) - break; - return pair<_InputIterator1, _InputIterator2>(__first1, __first2); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -pair<_InputIterator1, _InputIterator2> -mismatch(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2) -{ - typedef typename iterator_traits<_InputIterator1>::value_type __v1; - typedef typename iterator_traits<_InputIterator2>::value_type __v2; - return _VSTD::mismatch(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); -} -#endif - -// equal - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate __pred) -{ - for (; __first1 != __last1; ++__first1, (void) ++__first2) - if (!__pred(*__first1, *__first2)) - return false; - return true; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) -{ - typedef typename iterator_traits<_InputIterator1>::value_type __v1; - typedef typename iterator_traits<_InputIterator2>::value_type __v2; - return _VSTD::equal(__first1, __last1, __first2, __equal_to<__v1, __v2>()); -} - -#if _LIBCPP_STD_VER > 11 -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -__equal(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _BinaryPredicate __pred, - input_iterator_tag, input_iterator_tag ) -{ - for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void) ++__first2) - if (!__pred(*__first1, *__first2)) - return false; - return __first1 == __last1 && __first2 == __last2; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -__equal(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, - _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _BinaryPredicate __pred, - random_access_iterator_tag, random_access_iterator_tag ) -{ - if ( _VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) - return false; - return _VSTD::equal<_RandomAccessIterator1, _RandomAccessIterator2, - typename add_lvalue_reference<_BinaryPredicate>::type> - (__first1, __last1, __first2, __pred ); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -equal(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _BinaryPredicate __pred ) -{ - return _VSTD::__equal::type> - (__first1, __last1, __first2, __last2, __pred, - typename iterator_traits<_InputIterator1>::iterator_category(), - typename iterator_traits<_InputIterator2>::iterator_category()); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -equal(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2) -{ - typedef typename iterator_traits<_InputIterator1>::value_type __v1; - typedef typename iterator_traits<_InputIterator2>::value_type __v2; - return _VSTD::__equal(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>(), - typename iterator_traits<_InputIterator1>::iterator_category(), - typename iterator_traits<_InputIterator2>::iterator_category()); -} -#endif - -// is_permutation - -template -_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 bool -is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _BinaryPredicate __pred) -{ -// shorten sequences as much as possible by lopping of any equal prefix - for (; __first1 != __last1; ++__first1, (void) ++__first2) - if (!__pred(*__first1, *__first2)) - break; - if (__first1 == __last1) - return true; - -// __first1 != __last1 && *__first1 != *__first2 - typedef typename iterator_traits<_ForwardIterator1>::difference_type _D1; - _D1 __l1 = _VSTD::distance(__first1, __last1); - if (__l1 == _D1(1)) - return false; - _ForwardIterator2 __last2 = _VSTD::next(__first2, __l1); - // For each element in [f1, l1) see if there are the same number of - // equal elements in [f2, l2) - for (_ForwardIterator1 __i = __first1; __i != __last1; ++__i) - { - // Have we already counted the number of *__i in [f1, l1)? - _ForwardIterator1 __match = __first1; - for (; __match != __i; ++__match) - if (__pred(*__match, *__i)) - break; - if (__match == __i) { - // Count number of *__i in [f2, l2) - _D1 __c2 = 0; - for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) - if (__pred(*__i, *__j)) - ++__c2; - if (__c2 == 0) - return false; - // Count number of *__i in [__i, l1) (we can start with 1) - _D1 __c1 = 1; - for (_ForwardIterator1 __j = _VSTD::next(__i); __j != __last1; ++__j) - if (__pred(*__i, *__j)) - ++__c1; - if (__c1 != __c2) - return false; - } - } - return true; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2) -{ - typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; - typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; - return _VSTD::is_permutation(__first1, __last1, __first2, __equal_to<__v1, __v2>()); -} - -#if _LIBCPP_STD_VER > 11 -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 bool -__is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2, - _BinaryPredicate __pred, - forward_iterator_tag, forward_iterator_tag ) -{ -// shorten sequences as much as possible by lopping of any equal prefix - for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void) ++__first2) - if (!__pred(*__first1, *__first2)) - break; - if (__first1 == __last1) - return __first2 == __last2; - else if (__first2 == __last2) - return false; - - typedef typename iterator_traits<_ForwardIterator1>::difference_type _D1; - _D1 __l1 = _VSTD::distance(__first1, __last1); - - typedef typename iterator_traits<_ForwardIterator2>::difference_type _D2; - _D2 __l2 = _VSTD::distance(__first2, __last2); - if (__l1 != __l2) - return false; - - // For each element in [f1, l1) see if there are the same number of - // equal elements in [f2, l2) - for (_ForwardIterator1 __i = __first1; __i != __last1; ++__i) - { - // Have we already counted the number of *__i in [f1, l1)? - _ForwardIterator1 __match = __first1; - for (; __match != __i; ++__match) - if (__pred(*__match, *__i)) - break; - if (__match == __i) { - // Count number of *__i in [f2, l2) - _D1 __c2 = 0; - for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) - if (__pred(*__i, *__j)) - ++__c2; - if (__c2 == 0) - return false; - // Count number of *__i in [__i, l1) (we can start with 1) - _D1 __c1 = 1; - for (_ForwardIterator1 __j = _VSTD::next(__i); __j != __last1; ++__j) - if (__pred(*__i, *__j)) - ++__c1; - if (__c1 != __c2) - return false; - } - } - return true; -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 bool -__is_permutation(_RandomAccessIterator1 __first1, _RandomAccessIterator2 __last1, - _RandomAccessIterator1 __first2, _RandomAccessIterator2 __last2, - _BinaryPredicate __pred, - random_access_iterator_tag, random_access_iterator_tag ) -{ - if ( _VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) - return false; - return _VSTD::is_permutation<_RandomAccessIterator1, _RandomAccessIterator2, - typename add_lvalue_reference<_BinaryPredicate>::type> - (__first1, __last1, __first2, __pred ); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2, - _BinaryPredicate __pred ) -{ - return _VSTD::__is_permutation::type> - (__first1, __last1, __first2, __last2, __pred, - typename iterator_traits<_ForwardIterator1>::iterator_category(), - typename iterator_traits<_ForwardIterator2>::iterator_category()); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2) -{ - typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; - typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; - return _VSTD::__is_permutation(__first1, __last1, __first2, __last2, - __equal_to<__v1, __v2>(), - typename iterator_traits<_ForwardIterator1>::iterator_category(), - typename iterator_traits<_ForwardIterator2>::iterator_category()); -} -#endif - -// search -// __search is in - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator1 -search(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) -{ - return _VSTD::__search::type> - (__first1, __last1, __first2, __last2, __pred, - typename iterator_traits<_ForwardIterator1>::iterator_category(), - typename iterator_traits<_ForwardIterator2>::iterator_category()) - .first; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator1 -search(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2) -{ - typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; - typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; - return _VSTD::search(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); -} - - -#if _LIBCPP_STD_VER > 14 -template -_LIBCPP_NODISCARD_EXT _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator search(_ForwardIterator __f, _ForwardIterator __l, const _Searcher &__s) -{ return __s(__f, __l).first; } -#endif - -// search_n - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator -__search_n(_ForwardIterator __first, _ForwardIterator __last, - _Size __count, const _Tp& __value_, _BinaryPredicate __pred, forward_iterator_tag) -{ - if (__count <= 0) - return __first; - while (true) - { - // Find first element in sequence that matchs __value_, with a mininum of loop checks - while (true) - { - if (__first == __last) // return __last if no element matches __value_ - return __last; - if (__pred(*__first, __value_)) - break; - ++__first; - } - // *__first matches __value_, now match elements after here - _ForwardIterator __m = __first; - _Size __c(0); - while (true) - { - if (++__c == __count) // If pattern exhausted, __first is the answer (works for 1 element pattern) - return __first; - if (++__m == __last) // Otherwise if source exhaused, pattern not found - return __last; - if (!__pred(*__m, __value_)) // if there is a mismatch, restart with a new __first - { - __first = __m; - ++__first; - break; - } // else there is a match, check next elements - } - } -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _RandomAccessIterator -__search_n(_RandomAccessIterator __first, _RandomAccessIterator __last, - _Size __count, const _Tp& __value_, _BinaryPredicate __pred, random_access_iterator_tag) -{ - if (__count <= 0) - return __first; - _Size __len = static_cast<_Size>(__last - __first); - if (__len < __count) - return __last; - const _RandomAccessIterator __s = __last - (__count - 1); // Start of pattern match can't go beyond here - while (true) - { - // Find first element in sequence that matchs __value_, with a mininum of loop checks - while (true) - { - if (__first >= __s) // return __last if no element matches __value_ - return __last; - if (__pred(*__first, __value_)) - break; - ++__first; - } - // *__first matches __value_, now match elements after here - _RandomAccessIterator __m = __first; - _Size __c(0); - while (true) - { - if (++__c == __count) // If pattern exhausted, __first is the answer (works for 1 element pattern) - return __first; - ++__m; // no need to check range on __m because __s guarantees we have enough source - if (!__pred(*__m, __value_)) // if there is a mismatch, restart with a new __first - { - __first = __m; - ++__first; - break; - } // else there is a match, check next elements - } - } -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator -search_n(_ForwardIterator __first, _ForwardIterator __last, - _Size __count, const _Tp& __value_, _BinaryPredicate __pred) -{ - return _VSTD::__search_n::type> - (__first, __last, _VSTD::__convert_to_integral(__count), __value_, __pred, - typename iterator_traits<_ForwardIterator>::iterator_category()); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator -search_n(_ForwardIterator __first, _ForwardIterator __last, _Size __count, const _Tp& __value_) -{ - typedef typename iterator_traits<_ForwardIterator>::value_type __v; - return _VSTD::search_n(__first, __last, _VSTD::__convert_to_integral(__count), - __value_, __equal_to<__v, _Tp>()); -} - -// __unwrap_iter, __rewrap_iter - -// The job of __unwrap_iter is to lower contiguous iterators (such as -// vector::iterator) into pointers, to reduce the number of template -// instantiations and to enable pointer-based optimizations e.g. in std::copy. -// For iterators that are not contiguous, it must be a no-op. -// In debug mode, we don't do this. -// -// __unwrap_iter is non-constexpr for user-defined iterators whose -// `to_address` and/or `operator->` is non-constexpr. This is okay; but we -// try to avoid doing __unwrap_iter in constant-evaluated contexts anyway. -// -// Some algorithms (e.g. std::copy, but not std::sort) need to convert an -// "unwrapped" result back into a contiguous iterator. Since contiguous iterators -// are random-access, we can do this portably using iterator arithmetic; this -// is the job of __rewrap_iter. - -template ::value> -struct __unwrap_iter_impl { - static _LIBCPP_CONSTEXPR _Iter - __apply(_Iter __i) _NOEXCEPT { - return __i; - } -}; - -#if _LIBCPP_DEBUG_LEVEL < 2 - -template -struct __unwrap_iter_impl<_Iter, true> { - static _LIBCPP_CONSTEXPR decltype(_VSTD::__to_address(declval<_Iter>())) - __apply(_Iter __i) _NOEXCEPT { - return _VSTD::__to_address(__i); - } -}; - -#endif // _LIBCPP_DEBUG_LEVEL < 2 - -template > -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR -decltype(_Impl::__apply(declval<_Iter>())) -__unwrap_iter(_Iter __i) _NOEXCEPT -{ - return _Impl::__apply(__i); -} - -template -_OrigIter __rewrap_iter(_OrigIter, _OrigIter __result) -{ - return __result; -} - -template -_OrigIter __rewrap_iter(_OrigIter __first, _UnwrappedIter __result) -{ - // Precondition: __result is reachable from __first - // Precondition: _OrigIter is a contiguous iterator - return __first + (__result - _VSTD::__unwrap_iter(__first)); -} - -// copy - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -__copy_constexpr(_InputIterator __first, _InputIterator __last, _OutputIterator __result) -{ - for (; __first != __last; ++__first, (void) ++__result) - *__result = *__first; - return __result; -} - -template -inline _LIBCPP_INLINE_VISIBILITY -_OutputIterator -__copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) -{ - return _VSTD::__copy_constexpr(__first, __last, __result); -} - -template -inline _LIBCPP_INLINE_VISIBILITY -typename enable_if -< - is_same::type, _Up>::value && - is_trivially_copy_assignable<_Up>::value, - _Up* ->::type -__copy(_Tp* __first, _Tp* __last, _Up* __result) -{ - const size_t __n = static_cast(__last - __first); - if (__n > 0) - _VSTD::memmove(__result, __first, __n * sizeof(_Up)); - return __result + __n; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) -{ - if (__libcpp_is_constant_evaluated()) { - return _VSTD::__copy_constexpr(__first, __last, __result); - } else { - return _VSTD::__rewrap_iter(__result, - _VSTD::__copy(_VSTD::__unwrap_iter(__first), - _VSTD::__unwrap_iter(__last), - _VSTD::__unwrap_iter(__result))); - } -} - -// copy_backward - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -__copy_backward_constexpr(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __result) -{ - while (__first != __last) - *--__result = *--__last; - return __result; -} - -template -inline _LIBCPP_INLINE_VISIBILITY -_OutputIterator -__copy_backward(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __result) -{ - return _VSTD::__copy_backward_constexpr(__first, __last, __result); -} - -template -inline _LIBCPP_INLINE_VISIBILITY -typename enable_if -< - is_same::type, _Up>::value && - is_trivially_copy_assignable<_Up>::value, - _Up* ->::type -__copy_backward(_Tp* __first, _Tp* __last, _Up* __result) -{ - const size_t __n = static_cast(__last - __first); - if (__n > 0) - { - __result -= __n; - _VSTD::memmove(__result, __first, __n * sizeof(_Up)); - } - return __result; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_BidirectionalIterator2 -copy_backward(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last, - _BidirectionalIterator2 __result) -{ - if (__libcpp_is_constant_evaluated()) { - return _VSTD::__copy_backward_constexpr(__first, __last, __result); - } else { - return _VSTD::__rewrap_iter(__result, - _VSTD::__copy_backward(_VSTD::__unwrap_iter(__first), - _VSTD::__unwrap_iter(__last), - _VSTD::__unwrap_iter(__result))); - } -} - -// copy_if - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -copy_if(_InputIterator __first, _InputIterator __last, - _OutputIterator __result, _Predicate __pred) -{ - for (; __first != __last; ++__first) - { - if (__pred(*__first)) - { - *__result = *__first; - ++__result; - } - } - return __result; -} - -// copy_n - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -typename enable_if -< - __is_cpp17_input_iterator<_InputIterator>::value && - !__is_cpp17_random_access_iterator<_InputIterator>::value, - _OutputIterator ->::type -copy_n(_InputIterator __first, _Size __orig_n, _OutputIterator __result) -{ - typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; - _IntegralSize __n = __orig_n; - if (__n > 0) - { - *__result = *__first; - ++__result; - for (--__n; __n > 0; --__n) - { - ++__first; - *__result = *__first; - ++__result; - } - } - return __result; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -typename enable_if -< - __is_cpp17_random_access_iterator<_InputIterator>::value, - _OutputIterator ->::type -copy_n(_InputIterator __first, _Size __orig_n, _OutputIterator __result) -{ - typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; - _IntegralSize __n = __orig_n; - return _VSTD::copy(__first, __first + __n, __result); -} - -// move - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 -_OutputIterator -__move_constexpr(_InputIterator __first, _InputIterator __last, _OutputIterator __result) -{ - for (; __first != __last; ++__first, (void) ++__result) - *__result = _VSTD::move(*__first); - return __result; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 -_OutputIterator -__move(_InputIterator __first, _InputIterator __last, _OutputIterator __result) -{ - return _VSTD::__move_constexpr(__first, __last, __result); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 -typename enable_if -< - is_same::type, _Up>::value && - is_trivially_move_assignable<_Up>::value, - _Up* ->::type -__move(_Tp* __first, _Tp* __last, _Up* __result) -{ - const size_t __n = static_cast(__last - __first); - if (__n > 0) - _VSTD::memmove(__result, __first, __n * sizeof(_Up)); - return __result + __n; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -move(_InputIterator __first, _InputIterator __last, _OutputIterator __result) -{ - if (__libcpp_is_constant_evaluated()) { - return _VSTD::__move_constexpr(__first, __last, __result); - } else { - return _VSTD::__rewrap_iter(__result, - _VSTD::__move(_VSTD::__unwrap_iter(__first), - _VSTD::__unwrap_iter(__last), - _VSTD::__unwrap_iter(__result))); - } -} - -// move_backward - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 -_OutputIterator -__move_backward_constexpr(_InputIterator __first, _InputIterator __last, _OutputIterator __result) -{ - while (__first != __last) - *--__result = _VSTD::move(*--__last); - return __result; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 -_OutputIterator -__move_backward(_InputIterator __first, _InputIterator __last, _OutputIterator __result) -{ - return _VSTD::__move_backward_constexpr(__first, __last, __result); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 -typename enable_if -< - is_same::type, _Up>::value && - is_trivially_move_assignable<_Up>::value, - _Up* ->::type -__move_backward(_Tp* __first, _Tp* __last, _Up* __result) -{ - const size_t __n = static_cast(__last - __first); - if (__n > 0) - { - __result -= __n; - _VSTD::memmove(__result, __first, __n * sizeof(_Up)); - } - return __result; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_BidirectionalIterator2 -move_backward(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last, - _BidirectionalIterator2 __result) -{ - if (__libcpp_is_constant_evaluated()) { - return _VSTD::__move_backward_constexpr(__first, __last, __result); - } else { - return _VSTD::__rewrap_iter(__result, - _VSTD::__move_backward(_VSTD::__unwrap_iter(__first), - _VSTD::__unwrap_iter(__last), - _VSTD::__unwrap_iter(__result))); - } -} - -// iter_swap - -// moved to for better swap / noexcept support - -// transform - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -transform(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _UnaryOperation __op) -{ - for (; __first != __last; ++__first, (void) ++__result) - *__result = __op(*__first); - return __result; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -transform(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, - _OutputIterator __result, _BinaryOperation __binary_op) -{ - for (; __first1 != __last1; ++__first1, (void) ++__first2, ++__result) - *__result = __binary_op(*__first1, *__first2); - return __result; -} - -// replace - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -replace(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __old_value, const _Tp& __new_value) -{ - for (; __first != __last; ++__first) - if (*__first == __old_value) - *__first = __new_value; -} - -// replace_if - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -replace_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, const _Tp& __new_value) -{ - for (; __first != __last; ++__first) - if (__pred(*__first)) - *__first = __new_value; -} - -// replace_copy - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -replace_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, - const _Tp& __old_value, const _Tp& __new_value) -{ - for (; __first != __last; ++__first, (void) ++__result) - if (*__first == __old_value) - *__result = __new_value; - else - *__result = *__first; - return __result; -} - -// replace_copy_if - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -replace_copy_if(_InputIterator __first, _InputIterator __last, _OutputIterator __result, - _Predicate __pred, const _Tp& __new_value) -{ - for (; __first != __last; ++__first, (void) ++__result) - if (__pred(*__first)) - *__result = __new_value; - else - *__result = *__first; - return __result; -} - -// fill_n - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -__fill_n(_OutputIterator __first, _Size __n, const _Tp& __value_) -{ - for (; __n > 0; ++__first, (void) --__n) - *__first = __value_; - return __first; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -fill_n(_OutputIterator __first, _Size __n, const _Tp& __value_) -{ - return _VSTD::__fill_n(__first, _VSTD::__convert_to_integral(__n), __value_); -} - -// fill - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -__fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, forward_iterator_tag) -{ - for (; __first != __last; ++__first) - *__first = __value_; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -__fill(_RandomAccessIterator __first, _RandomAccessIterator __last, const _Tp& __value_, random_access_iterator_tag) -{ - _VSTD::fill_n(__first, __last - __first, __value_); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) -{ - _VSTD::__fill(__first, __last, __value_, typename iterator_traits<_ForwardIterator>::iterator_category()); -} - -// generate - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -generate(_ForwardIterator __first, _ForwardIterator __last, _Generator __gen) -{ - for (; __first != __last; ++__first) - *__first = __gen(); -} - -// generate_n - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -generate_n(_OutputIterator __first, _Size __orig_n, _Generator __gen) -{ - typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; - _IntegralSize __n = __orig_n; - for (; __n > 0; ++__first, (void) --__n) - *__first = __gen(); - return __first; -} - -// remove - -template -_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator -remove(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) -{ - __first = _VSTD::find(__first, __last, __value_); - if (__first != __last) - { - _ForwardIterator __i = __first; - while (++__i != __last) - { - if (!(*__i == __value_)) - { - *__first = _VSTD::move(*__i); - ++__first; - } - } - } - return __first; -} - -// remove_if - -template -_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator -remove_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) -{ - __first = _VSTD::find_if<_ForwardIterator, typename add_lvalue_reference<_Predicate>::type> - (__first, __last, __pred); - if (__first != __last) - { - _ForwardIterator __i = __first; - while (++__i != __last) - { - if (!__pred(*__i)) - { - *__first = _VSTD::move(*__i); - ++__first; - } - } - } - return __first; -} - -// remove_copy - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -remove_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, const _Tp& __value_) -{ - for (; __first != __last; ++__first) - { - if (!(*__first == __value_)) - { - *__result = *__first; - ++__result; - } - } - return __result; -} - -// remove_copy_if - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -remove_copy_if(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Predicate __pred) -{ - for (; __first != __last; ++__first) - { - if (!__pred(*__first)) - { - *__result = *__first; - ++__result; - } - } - return __result; -} - -// unique - -template -_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator -unique(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) -{ - __first = _VSTD::adjacent_find<_ForwardIterator, typename add_lvalue_reference<_BinaryPredicate>::type> - (__first, __last, __pred); - if (__first != __last) - { - // ... a a ? ... - // f i - _ForwardIterator __i = __first; - for (++__i; ++__i != __last;) - if (!__pred(*__first, *__i)) - *++__first = _VSTD::move(*__i); - ++__first; - } - return __first; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator -unique(_ForwardIterator __first, _ForwardIterator __last) -{ - typedef typename iterator_traits<_ForwardIterator>::value_type __v; - return _VSTD::unique(__first, __last, __equal_to<__v>()); -} - -// unique_copy - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator -__unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred, - input_iterator_tag, output_iterator_tag) -{ - if (__first != __last) - { - typename iterator_traits<_InputIterator>::value_type __t(*__first); - *__result = __t; - ++__result; - while (++__first != __last) - { - if (!__pred(__t, *__first)) - { - __t = *__first; - *__result = __t; - ++__result; - } - } - } - return __result; -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator -__unique_copy(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, _BinaryPredicate __pred, - forward_iterator_tag, output_iterator_tag) -{ - if (__first != __last) - { - _ForwardIterator __i = __first; - *__result = *__i; - ++__result; - while (++__first != __last) - { - if (!__pred(*__i, *__first)) - { - *__result = *__first; - ++__result; - __i = __first; - } - } - } - return __result; -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator -__unique_copy(_InputIterator __first, _InputIterator __last, _ForwardIterator __result, _BinaryPredicate __pred, - input_iterator_tag, forward_iterator_tag) -{ - if (__first != __last) - { - *__result = *__first; - while (++__first != __last) - if (!__pred(*__result, *__first)) - *++__result = *__first; - ++__result; - } - return __result; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) -{ - return _VSTD::__unique_copy::type> - (__first, __last, __result, __pred, - typename iterator_traits<_InputIterator>::iterator_category(), - typename iterator_traits<_OutputIterator>::iterator_category()); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) -{ - typedef typename iterator_traits<_InputIterator>::value_type __v; - return _VSTD::unique_copy(__first, __last, __result, __equal_to<__v>()); -} - -// reverse - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -__reverse(_BidirectionalIterator __first, _BidirectionalIterator __last, bidirectional_iterator_tag) -{ - while (__first != __last) - { - if (__first == --__last) - break; - _VSTD::iter_swap(__first, __last); - ++__first; - } -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -__reverse(_RandomAccessIterator __first, _RandomAccessIterator __last, random_access_iterator_tag) -{ - if (__first != __last) - for (; __first < --__last; ++__first) - _VSTD::iter_swap(__first, __last); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -reverse(_BidirectionalIterator __first, _BidirectionalIterator __last) -{ - _VSTD::__reverse(__first, __last, typename iterator_traits<_BidirectionalIterator>::iterator_category()); -} - -// reverse_copy - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -reverse_copy(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __result) -{ - for (; __first != __last; ++__result) - *__result = *--__last; - return __result; -} - -// rotate - -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 _ForwardIterator -__rotate_left(_ForwardIterator __first, _ForwardIterator __last) -{ - typedef typename iterator_traits<_ForwardIterator>::value_type value_type; - value_type __tmp = _VSTD::move(*__first); - _ForwardIterator __lm1 = _VSTD::move(_VSTD::next(__first), __last, __first); - *__lm1 = _VSTD::move(__tmp); - return __lm1; -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 _BidirectionalIterator -__rotate_right(_BidirectionalIterator __first, _BidirectionalIterator __last) -{ - typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; - _BidirectionalIterator __lm1 = _VSTD::prev(__last); - value_type __tmp = _VSTD::move(*__lm1); - _BidirectionalIterator __fp1 = _VSTD::move_backward(__first, __lm1, __last); - *__first = _VSTD::move(__tmp); - return __fp1; -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX14 _ForwardIterator -__rotate_forward(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last) -{ - _ForwardIterator __i = __middle; - while (true) - { - swap(*__first, *__i); - ++__first; - if (++__i == __last) - break; - if (__first == __middle) - __middle = __i; - } - _ForwardIterator __r = __first; - if (__first != __middle) - { - __i = __middle; - while (true) - { - swap(*__first, *__i); - ++__first; - if (++__i == __last) - { - if (__first == __middle) - break; - __i = __middle; - } - else if (__first == __middle) - __middle = __i; - } - } - return __r; -} - -template -inline _LIBCPP_INLINE_VISIBILITY -_LIBCPP_CONSTEXPR_AFTER_CXX14 _Integral -__algo_gcd(_Integral __x, _Integral __y) -{ - do - { - _Integral __t = __x % __y; - __x = __y; - __y = __t; - } while (__y); - return __x; -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX14 _RandomAccessIterator -__rotate_gcd(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last) -{ - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; - - const difference_type __m1 = __middle - __first; - const difference_type __m2 = __last - __middle; - if (__m1 == __m2) - { - _VSTD::swap_ranges(__first, __middle, __middle); - return __middle; - } - const difference_type __g = _VSTD::__algo_gcd(__m1, __m2); - for (_RandomAccessIterator __p = __first + __g; __p != __first;) - { - value_type __t(_VSTD::move(*--__p)); - _RandomAccessIterator __p1 = __p; - _RandomAccessIterator __p2 = __p1 + __m1; - do - { - *__p1 = _VSTD::move(*__p2); - __p1 = __p2; - const difference_type __d = __last - __p2; - if (__m1 < __d) - __p2 += __m1; - else - __p2 = __first + (__m1 - __d); - } while (__p2 != __p); - *__p1 = _VSTD::move(__t); - } - return __first + __m2; -} - -template -inline _LIBCPP_INLINE_VISIBILITY -_LIBCPP_CONSTEXPR_AFTER_CXX11 _ForwardIterator -__rotate(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, - _VSTD::forward_iterator_tag) -{ - typedef typename iterator_traits<_ForwardIterator>::value_type value_type; - if (is_trivially_move_assignable::value) - { - if (_VSTD::next(__first) == __middle) - return _VSTD::__rotate_left(__first, __last); - } - return _VSTD::__rotate_forward(__first, __middle, __last); -} - -template -inline _LIBCPP_INLINE_VISIBILITY -_LIBCPP_CONSTEXPR_AFTER_CXX11 _BidirectionalIterator -__rotate(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, - bidirectional_iterator_tag) -{ - typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; - if (is_trivially_move_assignable::value) - { - if (_VSTD::next(__first) == __middle) - return _VSTD::__rotate_left(__first, __last); - if (_VSTD::next(__middle) == __last) - return _VSTD::__rotate_right(__first, __last); - } - return _VSTD::__rotate_forward(__first, __middle, __last); -} - -template -inline _LIBCPP_INLINE_VISIBILITY -_LIBCPP_CONSTEXPR_AFTER_CXX11 _RandomAccessIterator -__rotate(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, - random_access_iterator_tag) -{ - typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; - if (is_trivially_move_assignable::value) - { - if (_VSTD::next(__first) == __middle) - return _VSTD::__rotate_left(__first, __last); - if (_VSTD::next(__middle) == __last) - return _VSTD::__rotate_right(__first, __last); - return _VSTD::__rotate_gcd(__first, __middle, __last); - } - return _VSTD::__rotate_forward(__first, __middle, __last); -} - -template -inline _LIBCPP_INLINE_VISIBILITY -_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator -rotate(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last) -{ - if (__first == __middle) - return __last; - if (__middle == __last) - return __first; - return _VSTD::__rotate(__first, __middle, __last, - typename iterator_traits<_ForwardIterator>::iterator_category()); -} - -// rotate_copy - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -rotate_copy(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, _OutputIterator __result) -{ - return _VSTD::copy(__first, __middle, _VSTD::copy(__middle, __last, __result)); -} - -// min_element - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -_ForwardIterator -min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) -{ - static_assert(__is_cpp17_forward_iterator<_ForwardIterator>::value, - "std::min_element requires a ForwardIterator"); - if (__first != __last) - { - _ForwardIterator __i = __first; - while (++__i != __last) - if (__comp(*__i, *__first)) - __first = __i; - } - return __first; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -_ForwardIterator -min_element(_ForwardIterator __first, _ForwardIterator __last) -{ - return _VSTD::min_element(__first, __last, - __less::value_type>()); -} - -// min - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -const _Tp& -min(const _Tp& __a, const _Tp& __b, _Compare __comp) -{ - return __comp(__b, __a) ? __b : __a; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -const _Tp& -min(const _Tp& __a, const _Tp& __b) -{ - return _VSTD::min(__a, __b, __less<_Tp>()); -} - -#ifndef _LIBCPP_CXX03_LANG - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -_Tp -min(initializer_list<_Tp> __t, _Compare __comp) -{ - return *_VSTD::min_element(__t.begin(), __t.end(), __comp); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -_Tp -min(initializer_list<_Tp> __t) -{ - return *_VSTD::min_element(__t.begin(), __t.end(), __less<_Tp>()); -} - -#endif // _LIBCPP_CXX03_LANG - -// max_element - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -_ForwardIterator -max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) -{ - static_assert(__is_cpp17_forward_iterator<_ForwardIterator>::value, - "std::max_element requires a ForwardIterator"); - if (__first != __last) - { - _ForwardIterator __i = __first; - while (++__i != __last) - if (__comp(*__first, *__i)) - __first = __i; - } - return __first; -} - - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -_ForwardIterator -max_element(_ForwardIterator __first, _ForwardIterator __last) -{ - return _VSTD::max_element(__first, __last, - __less::value_type>()); -} - -// max - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -const _Tp& -max(const _Tp& __a, const _Tp& __b, _Compare __comp) -{ - return __comp(__a, __b) ? __b : __a; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -const _Tp& -max(const _Tp& __a, const _Tp& __b) -{ - return _VSTD::max(__a, __b, __less<_Tp>()); -} - -#ifndef _LIBCPP_CXX03_LANG - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -_Tp -max(initializer_list<_Tp> __t, _Compare __comp) -{ - return *_VSTD::max_element(__t.begin(), __t.end(), __comp); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -_Tp -max(initializer_list<_Tp> __t) -{ - return *_VSTD::max_element(__t.begin(), __t.end(), __less<_Tp>()); -} - -#endif // _LIBCPP_CXX03_LANG - -#if _LIBCPP_STD_VER > 14 -// clamp -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR -const _Tp& -clamp(const _Tp& __v, const _Tp& __lo, const _Tp& __hi, _Compare __comp) -{ - _LIBCPP_ASSERT(!__comp(__hi, __lo), "Bad bounds passed to std::clamp"); - return __comp(__v, __lo) ? __lo : __comp(__hi, __v) ? __hi : __v; - -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR -const _Tp& -clamp(const _Tp& __v, const _Tp& __lo, const _Tp& __hi) -{ - return _VSTD::clamp(__v, __lo, __hi, __less<_Tp>()); -} -#endif - -// minmax_element - -template -_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX11 -pair<_ForwardIterator, _ForwardIterator> -minmax_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) -{ - static_assert(__is_cpp17_forward_iterator<_ForwardIterator>::value, - "std::minmax_element requires a ForwardIterator"); - pair<_ForwardIterator, _ForwardIterator> __result(__first, __first); - if (__first != __last) - { - if (++__first != __last) - { - if (__comp(*__first, *__result.first)) - __result.first = __first; - else - __result.second = __first; - while (++__first != __last) - { - _ForwardIterator __i = __first; - if (++__first == __last) - { - if (__comp(*__i, *__result.first)) - __result.first = __i; - else if (!__comp(*__i, *__result.second)) - __result.second = __i; - break; - } - else - { - if (__comp(*__first, *__i)) - { - if (__comp(*__first, *__result.first)) - __result.first = __first; - if (!__comp(*__i, *__result.second)) - __result.second = __i; - } - else - { - if (__comp(*__i, *__result.first)) - __result.first = __i; - if (!__comp(*__first, *__result.second)) - __result.second = __first; - } - } - } - } - } - return __result; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -pair<_ForwardIterator, _ForwardIterator> -minmax_element(_ForwardIterator __first, _ForwardIterator __last) -{ - return _VSTD::minmax_element(__first, __last, - __less::value_type>()); -} - -// minmax - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -pair -minmax(const _Tp& __a, const _Tp& __b, _Compare __comp) -{ - return __comp(__b, __a) ? pair(__b, __a) : - pair(__a, __b); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -pair -minmax(const _Tp& __a, const _Tp& __b) -{ - return _VSTD::minmax(__a, __b, __less<_Tp>()); -} - -#ifndef _LIBCPP_CXX03_LANG - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -pair<_Tp, _Tp> -minmax(initializer_list<_Tp> __t, _Compare __comp) -{ - typedef typename initializer_list<_Tp>::const_iterator _Iter; - _Iter __first = __t.begin(); - _Iter __last = __t.end(); - pair<_Tp, _Tp> __result(*__first, *__first); - - ++__first; - if (__t.size() % 2 == 0) - { - if (__comp(*__first, __result.first)) - __result.first = *__first; - else - __result.second = *__first; - ++__first; - } - - while (__first != __last) - { - _Tp __prev = *__first++; - if (__comp(*__first, __prev)) { - if ( __comp(*__first, __result.first)) __result.first = *__first; - if (!__comp(__prev, __result.second)) __result.second = __prev; - } - else { - if ( __comp(__prev, __result.first)) __result.first = __prev; - if (!__comp(*__first, __result.second)) __result.second = *__first; - } - - __first++; - } - return __result; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 -pair<_Tp, _Tp> -minmax(initializer_list<_Tp> __t) -{ - return _VSTD::minmax(__t, __less<_Tp>()); -} - -#endif // _LIBCPP_CXX03_LANG - -// random_shuffle - -// __independent_bits_engine - -template -struct __log2_imp -{ - static const size_t value = _Xp & ((unsigned long long)(1) << _Rp) ? _Rp - : __log2_imp<_Xp, _Rp - 1>::value; -}; - -template -struct __log2_imp<_Xp, 0> -{ - static const size_t value = 0; -}; - -template -struct __log2_imp<0, _Rp> -{ - static const size_t value = _Rp + 1; -}; - -template -struct __log2 -{ - static const size_t value = __log2_imp<_Xp, - sizeof(_UIntType) * __CHAR_BIT__ - 1>::value; -}; - -template -class __independent_bits_engine -{ -public: - // types - typedef _UIntType result_type; - -private: - typedef typename _Engine::result_type _Engine_result_type; - typedef typename conditional - < - sizeof(_Engine_result_type) <= sizeof(result_type), - result_type, - _Engine_result_type - >::type _Working_result_type; - - _Engine& __e_; - size_t __w_; - size_t __w0_; - size_t __n_; - size_t __n0_; - _Working_result_type __y0_; - _Working_result_type __y1_; - _Engine_result_type __mask0_; - _Engine_result_type __mask1_; - -#ifdef _LIBCPP_CXX03_LANG - static const _Working_result_type _Rp = _Engine::_Max - _Engine::_Min - + _Working_result_type(1); -#else - static _LIBCPP_CONSTEXPR const _Working_result_type _Rp = _Engine::max() - _Engine::min() - + _Working_result_type(1); -#endif - static _LIBCPP_CONSTEXPR const size_t __m = __log2<_Working_result_type, _Rp>::value; - static _LIBCPP_CONSTEXPR const size_t _WDt = numeric_limits<_Working_result_type>::digits; - static _LIBCPP_CONSTEXPR const size_t _EDt = numeric_limits<_Engine_result_type>::digits; - -public: - // constructors and seeding functions - __independent_bits_engine(_Engine& __e, size_t __w); - - // generating functions - result_type operator()() {return __eval(integral_constant());} - -private: - result_type __eval(false_type); - result_type __eval(true_type); -}; - -template -__independent_bits_engine<_Engine, _UIntType> - ::__independent_bits_engine(_Engine& __e, size_t __w) - : __e_(__e), - __w_(__w) -{ - __n_ = __w_ / __m + (__w_ % __m != 0); - __w0_ = __w_ / __n_; - if (_Rp == 0) - __y0_ = _Rp; - else if (__w0_ < _WDt) - __y0_ = (_Rp >> __w0_) << __w0_; - else - __y0_ = 0; - if (_Rp - __y0_ > __y0_ / __n_) - { - ++__n_; - __w0_ = __w_ / __n_; - if (__w0_ < _WDt) - __y0_ = (_Rp >> __w0_) << __w0_; - else - __y0_ = 0; - } - __n0_ = __n_ - __w_ % __n_; - if (__w0_ < _WDt - 1) - __y1_ = (_Rp >> (__w0_ + 1)) << (__w0_ + 1); - else - __y1_ = 0; - __mask0_ = __w0_ > 0 ? _Engine_result_type(~0) >> (_EDt - __w0_) : - _Engine_result_type(0); - __mask1_ = __w0_ < _EDt - 1 ? - _Engine_result_type(~0) >> (_EDt - (__w0_ + 1)) : - _Engine_result_type(~0); -} - -template -inline -_UIntType -__independent_bits_engine<_Engine, _UIntType>::__eval(false_type) -{ - return static_cast(__e_() & __mask0_); -} - -template -_UIntType -__independent_bits_engine<_Engine, _UIntType>::__eval(true_type) -{ - const size_t _WRt = numeric_limits::digits; - result_type _Sp = 0; - for (size_t __k = 0; __k < __n0_; ++__k) - { - _Engine_result_type __u; - do - { - __u = __e_() - _Engine::min(); - } while (__u >= __y0_); - if (__w0_ < _WRt) - _Sp <<= __w0_; - else - _Sp = 0; - _Sp += __u & __mask0_; - } - for (size_t __k = __n0_; __k < __n_; ++__k) - { - _Engine_result_type __u; - do - { - __u = __e_() - _Engine::min(); - } while (__u >= __y1_); - if (__w0_ < _WRt - 1) - _Sp <<= __w0_ + 1; - else - _Sp = 0; - _Sp += __u & __mask1_; - } - return _Sp; -} - -// uniform_int_distribution - -template -class uniform_int_distribution -{ -public: - // types - typedef _IntType result_type; - - class param_type - { - result_type __a_; - result_type __b_; - public: - typedef uniform_int_distribution distribution_type; - - explicit param_type(result_type __a = 0, - result_type __b = numeric_limits::max()) - : __a_(__a), __b_(__b) {} - - result_type a() const {return __a_;} - result_type b() const {return __b_;} - - friend bool operator==(const param_type& __x, const param_type& __y) - {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} - friend bool operator!=(const param_type& __x, const param_type& __y) - {return !(__x == __y);} - }; - -private: - param_type __p_; - -public: - // constructors and reset functions -#ifndef _LIBCPP_CXX03_LANG - uniform_int_distribution() : uniform_int_distribution(0) {} - explicit uniform_int_distribution( - result_type __a, result_type __b = numeric_limits::max()) - : __p_(param_type(__a, __b)) {} -#else - explicit uniform_int_distribution( - result_type __a = 0, - result_type __b = numeric_limits::max()) - : __p_(param_type(__a, __b)) {} -#endif - explicit uniform_int_distribution(const param_type& __p) : __p_(__p) {} - void reset() {} - - // generating functions - template result_type operator()(_URNG& __g) - {return (*this)(__g, __p_);} - template result_type operator()(_URNG& __g, const param_type& __p); - - // property functions - result_type a() const {return __p_.a();} - result_type b() const {return __p_.b();} - - param_type param() const {return __p_;} - void param(const param_type& __p) {__p_ = __p;} - - result_type min() const {return a();} - result_type max() const {return b();} - - friend bool operator==(const uniform_int_distribution& __x, - const uniform_int_distribution& __y) - {return __x.__p_ == __y.__p_;} - friend bool operator!=(const uniform_int_distribution& __x, - const uniform_int_distribution& __y) - {return !(__x == __y);} -}; - -template -template -typename uniform_int_distribution<_IntType>::result_type -uniform_int_distribution<_IntType>::operator()(_URNG& __g, const param_type& __p) -_LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK -{ - typedef typename conditional::type _UIntType; - const _UIntType _Rp = _UIntType(__p.b()) - _UIntType(__p.a()) + _UIntType(1); - if (_Rp == 1) - return __p.a(); - const size_t _Dt = numeric_limits<_UIntType>::digits; - typedef __independent_bits_engine<_URNG, _UIntType> _Eng; - if (_Rp == 0) - return static_cast(_Eng(__g, _Dt)()); - size_t __w = _Dt - __libcpp_clz(_Rp) - 1; - if ((_Rp & (numeric_limits<_UIntType>::max() >> (_Dt - __w))) != 0) - ++__w; - _Eng __e(__g, __w); - _UIntType __u; - do - { - __u = __e(); - } while (__u >= _Rp); - return static_cast(__u + __p.a()); -} - -#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE) \ - || defined(_LIBCPP_BUILDING_LIBRARY) -class _LIBCPP_TYPE_VIS __rs_default; - -_LIBCPP_FUNC_VIS __rs_default __rs_get(); - -class _LIBCPP_TYPE_VIS __rs_default -{ - static unsigned __c_; - - __rs_default(); -public: - typedef uint_fast32_t result_type; - - static const result_type _Min = 0; - static const result_type _Max = 0xFFFFFFFF; - - __rs_default(const __rs_default&); - ~__rs_default(); - - result_type operator()(); - - static _LIBCPP_CONSTEXPR result_type min() {return _Min;} - static _LIBCPP_CONSTEXPR result_type max() {return _Max;} - - friend _LIBCPP_FUNC_VIS __rs_default __rs_get(); -}; - -_LIBCPP_FUNC_VIS __rs_default __rs_get(); - -template -_LIBCPP_DEPRECATED_IN_CXX14 void -random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last) -{ - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - typedef uniform_int_distribution _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 -_LIBCPP_DEPRECATED_IN_CXX14 void -random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last, -#ifndef _LIBCPP_CXX03_LANG - _RandomNumberGenerator&& __rand) -#else - _RandomNumberGenerator& __rand) -#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)); - } - } -} -#endif - -template -_LIBCPP_INLINE_VISIBILITY -_SampleIterator __sample(_PopulationIterator __first, - _PopulationIterator __last, _SampleIterator __output_iter, - _Distance __n, - _UniformRandomNumberGenerator & __g, - input_iterator_tag) { - - _Distance __k = 0; - for (; __first != __last && __k < __n; ++__first, (void) ++__k) - __output_iter[__k] = *__first; - _Distance __sz = __k; - for (; __first != __last; ++__first, (void) ++__k) { - _Distance __r = uniform_int_distribution<_Distance>(0, __k)(__g); - if (__r < __sz) - __output_iter[__r] = *__first; - } - return __output_iter + _VSTD::min(__n, __k); -} - -template -_LIBCPP_INLINE_VISIBILITY -_SampleIterator __sample(_PopulationIterator __first, - _PopulationIterator __last, _SampleIterator __output_iter, - _Distance __n, - _UniformRandomNumberGenerator& __g, - forward_iterator_tag) { - _Distance __unsampled_sz = _VSTD::distance(__first, __last); - for (__n = _VSTD::min(__n, __unsampled_sz); __n != 0; ++__first) { - _Distance __r = uniform_int_distribution<_Distance>(0, --__unsampled_sz)(__g); - if (__r < __n) { - *__output_iter++ = *__first; - --__n; - } - } - return __output_iter; -} - -template -_LIBCPP_INLINE_VISIBILITY -_SampleIterator __sample(_PopulationIterator __first, - _PopulationIterator __last, _SampleIterator __output_iter, - _Distance __n, _UniformRandomNumberGenerator& __g) { - typedef typename iterator_traits<_PopulationIterator>::iterator_category - _PopCategory; - typedef typename iterator_traits<_PopulationIterator>::difference_type - _Difference; - static_assert(__is_cpp17_forward_iterator<_PopulationIterator>::value || - __is_cpp17_random_access_iterator<_SampleIterator>::value, - "SampleIterator must meet the requirements of RandomAccessIterator"); - typedef typename common_type<_Distance, _Difference>::type _CommonType; - _LIBCPP_ASSERT(__n >= 0, "N must be a positive number."); - return _VSTD::__sample( - __first, __last, __output_iter, _CommonType(__n), - __g, _PopCategory()); -} - -#if _LIBCPP_STD_VER > 14 -template -inline _LIBCPP_INLINE_VISIBILITY -_SampleIterator sample(_PopulationIterator __first, - _PopulationIterator __last, _SampleIterator __output_iter, - _Distance __n, _UniformRandomNumberGenerator&& __g) { - return _VSTD::__sample(__first, __last, __output_iter, __n, __g); -} -#endif // _LIBCPP_STD_VER > 14 - -template - void shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last, - _UniformRandomNumberGenerator&& __g) -{ - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - typedef uniform_int_distribution _Dp; - typedef typename _Dp::param_type _Pp; - 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)) - swap(*__first, *(__first + __i)); - } - } -} - -#if _LIBCPP_STD_VER > 17 - -// shift_left, shift_right - -template -inline _LIBCPP_INLINE_VISIBILITY constexpr -_ForwardIterator -shift_left(_ForwardIterator __first, _ForwardIterator __last, - typename iterator_traits<_ForwardIterator>::difference_type __n) -{ - if (__n == 0) { - return __last; - } - - _ForwardIterator __m = __first; - if constexpr (__is_cpp17_random_access_iterator<_ForwardIterator>::value) { - if (__n >= __last - __first) { - return __first; - } - __m += __n; - } else { - for (; __n > 0; --__n) { - if (__m == __last) { - return __first; - } - ++__m; - } - } - return _VSTD::move(__m, __last, __first); -} - -template -inline _LIBCPP_INLINE_VISIBILITY constexpr -_ForwardIterator -shift_right(_ForwardIterator __first, _ForwardIterator __last, - typename iterator_traits<_ForwardIterator>::difference_type __n) -{ - if (__n == 0) { - return __first; - } - - if constexpr (__is_cpp17_random_access_iterator<_ForwardIterator>::value) { - decltype(__n) __d = __last - __first; - if (__n >= __d) { - return __last; - } - _ForwardIterator __m = __first + (__d - __n); - return _VSTD::move_backward(__first, __m, __last); - } else if constexpr (__is_cpp17_bidirectional_iterator<_ForwardIterator>::value) { - _ForwardIterator __m = __last; - for (; __n > 0; --__n) { - if (__m == __first) { - return __last; - } - --__m; - } - return _VSTD::move_backward(__first, __m, __last); - } else { - _ForwardIterator __ret = __first; - for (; __n > 0; --__n) { - if (__ret == __last) { - return __last; - } - ++__ret; - } - - // We have an __n-element scratch space from __first to __ret. - // Slide an __n-element window [__trail, __lead) from left to right. - // We're essentially doing swap_ranges(__first, __ret, __trail, __lead) - // over and over; but once __lead reaches __last we needn't bother - // to save the values of elements [__trail, __last). - - auto __trail = __first; - auto __lead = __ret; - while (__trail != __ret) { - if (__lead == __last) { - _VSTD::move(__first, __trail, __ret); - return __ret; - } - ++__trail; - ++__lead; - } - - _ForwardIterator __mid = __first; - while (true) { - if (__lead == __last) { - __trail = _VSTD::move(__mid, __ret, __trail); - _VSTD::move(__first, __mid, __trail); - return __ret; - } - swap(*__mid, *__trail); - ++__mid; - ++__trail; - ++__lead; - if (__mid == __ret) { - __mid = __first; - } - } - } -} - -#endif // _LIBCPP_STD_VER > 17 - -// is_partitioned - -template -_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 bool -is_partitioned(_InputIterator __first, _InputIterator __last, _Predicate __pred) -{ - for (; __first != __last; ++__first) - if (!__pred(*__first)) - break; - if ( __first == __last ) - return true; - ++__first; - for (; __first != __last; ++__first) - if (__pred(*__first)) - return false; - return true; -} - -// partition - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator -__partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, forward_iterator_tag) -{ - while (true) - { - if (__first == __last) - return __first; - if (!__pred(*__first)) - break; - ++__first; - } - for (_ForwardIterator __p = __first; ++__p != __last;) - { - if (__pred(*__p)) - { - swap(*__first, *__p); - ++__first; - } - } - return __first; -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _BidirectionalIterator -__partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, - bidirectional_iterator_tag) -{ - while (true) - { - while (true) - { - if (__first == __last) - return __first; - if (!__pred(*__first)) - break; - ++__first; - } - do - { - if (__first == --__last) - return __first; - } while (!__pred(*__last)); - swap(*__first, *__last); - ++__first; - } -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator -partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) -{ - return _VSTD::__partition::type> - (__first, __last, __pred, typename iterator_traits<_ForwardIterator>::iterator_category()); -} - -// partition_copy - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 pair<_OutputIterator1, _OutputIterator2> -partition_copy(_InputIterator __first, _InputIterator __last, - _OutputIterator1 __out_true, _OutputIterator2 __out_false, - _Predicate __pred) -{ - for (; __first != __last; ++__first) - { - if (__pred(*__first)) - { - *__out_true = *__first; - ++__out_true; - } - else - { - *__out_false = *__first; - ++__out_false; - } - } - return pair<_OutputIterator1, _OutputIterator2>(__out_true, __out_false); -} - -// partition_point - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator -partition_point(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) -{ - typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; - difference_type __len = _VSTD::distance(__first, __last); - while (__len != 0) - { - difference_type __l2 = _VSTD::__half_positive(__len); - _ForwardIterator __m = __first; - _VSTD::advance(__m, __l2); - if (__pred(*__m)) - { - __first = ++__m; - __len -= __l2 + 1; - } - else - __len = __l2; - } - return __first; -} - -// stable_partition - -template -_ForwardIterator -__stable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, - _Distance __len, _Pair __p, forward_iterator_tag __fit) -{ - // *__first is known to be false - // __len >= 1 - if (__len == 1) - return __first; - if (__len == 2) - { - _ForwardIterator __m = __first; - if (__pred(*++__m)) - { - swap(*__first, *__m); - return __m; - } - return __first; - } - if (__len <= __p.second) - { // The buffer is big enough to use - typedef typename iterator_traits<_ForwardIterator>::value_type value_type; - __destruct_n __d(0); - unique_ptr __h(__p.first, __d); - // Move the falses into the temporary buffer, and the trues to the front of the line - // Update __first to always point to the end of the trues - value_type* __t = __p.first; - ::new ((void*)__t) value_type(_VSTD::move(*__first)); - __d.template __incr(); - ++__t; - _ForwardIterator __i = __first; - while (++__i != __last) - { - if (__pred(*__i)) - { - *__first = _VSTD::move(*__i); - ++__first; - } - else - { - ::new ((void*)__t) value_type(_VSTD::move(*__i)); - __d.template __incr(); - ++__t; - } - } - // All trues now at start of range, all falses in buffer - // Move falses back into range, but don't mess up __first which points to first false - __i = __first; - for (value_type* __t2 = __p.first; __t2 < __t; ++__t2, (void) ++__i) - *__i = _VSTD::move(*__t2); - // __h destructs moved-from values out of the temp buffer, but doesn't deallocate buffer - return __first; - } - // Else not enough buffer, do in place - // __len >= 3 - _ForwardIterator __m = __first; - _Distance __len2 = __len / 2; // __len2 >= 2 - _VSTD::advance(__m, __len2); - // recurse on [__first, __m), *__first know to be false - // F????????????????? - // f m l - typedef typename add_lvalue_reference<_Predicate>::type _PredRef; - _ForwardIterator __first_false = _VSTD::__stable_partition<_PredRef>(__first, __m, __pred, __len2, __p, __fit); - // TTTFFFFF?????????? - // f ff m l - // recurse on [__m, __last], except increase __m until *(__m) is false, *__last know to be true - _ForwardIterator __m1 = __m; - _ForwardIterator __second_false = __last; - _Distance __len_half = __len - __len2; - while (__pred(*__m1)) - { - if (++__m1 == __last) - goto __second_half_done; - --__len_half; - } - // TTTFFFFFTTTF?????? - // f ff m m1 l - __second_false = _VSTD::__stable_partition<_PredRef>(__m1, __last, __pred, __len_half, __p, __fit); -__second_half_done: - // TTTFFFFFTTTTTFFFFF - // f ff m sf l - return _VSTD::rotate(__first_false, __m, __second_false); - // TTTTTTTTFFFFFFFFFF - // | -} - -struct __return_temporary_buffer -{ - template - _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) const {_VSTD::return_temporary_buffer(__p);} -}; - -template -_ForwardIterator -__stable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, - forward_iterator_tag) -{ - const unsigned __alloc_limit = 3; // might want to make this a function of trivial assignment - // Either prove all true and return __first or point to first false - while (true) - { - if (__first == __last) - return __first; - if (!__pred(*__first)) - break; - ++__first; - } - // We now have a reduced range [__first, __last) - // *__first is known to be false - typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; - typedef typename iterator_traits<_ForwardIterator>::value_type value_type; - difference_type __len = _VSTD::distance(__first, __last); - pair __p(0, 0); - unique_ptr __h; - if (__len >= __alloc_limit) - { - __p = _VSTD::get_temporary_buffer(__len); - __h.reset(__p.first); - } - return _VSTD::__stable_partition::type> - (__first, __last, __pred, __len, __p, forward_iterator_tag()); -} - -template -_BidirectionalIterator -__stable_partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, - _Distance __len, _Pair __p, bidirectional_iterator_tag __bit) -{ - // *__first is known to be false - // *__last is known to be true - // __len >= 2 - if (__len == 2) - { - swap(*__first, *__last); - return __last; - } - if (__len == 3) - { - _BidirectionalIterator __m = __first; - if (__pred(*++__m)) - { - swap(*__first, *__m); - swap(*__m, *__last); - return __last; - } - swap(*__m, *__last); - swap(*__first, *__m); - return __m; - } - if (__len <= __p.second) - { // The buffer is big enough to use - typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; - __destruct_n __d(0); - unique_ptr __h(__p.first, __d); - // Move the falses into the temporary buffer, and the trues to the front of the line - // Update __first to always point to the end of the trues - value_type* __t = __p.first; - ::new ((void*)__t) value_type(_VSTD::move(*__first)); - __d.template __incr(); - ++__t; - _BidirectionalIterator __i = __first; - while (++__i != __last) - { - if (__pred(*__i)) - { - *__first = _VSTD::move(*__i); - ++__first; - } - else - { - ::new ((void*)__t) value_type(_VSTD::move(*__i)); - __d.template __incr(); - ++__t; - } - } - // move *__last, known to be true - *__first = _VSTD::move(*__i); - __i = ++__first; - // All trues now at start of range, all falses in buffer - // Move falses back into range, but don't mess up __first which points to first false - for (value_type* __t2 = __p.first; __t2 < __t; ++__t2, (void) ++__i) - *__i = _VSTD::move(*__t2); - // __h destructs moved-from values out of the temp buffer, but doesn't deallocate buffer - return __first; - } - // Else not enough buffer, do in place - // __len >= 4 - _BidirectionalIterator __m = __first; - _Distance __len2 = __len / 2; // __len2 >= 2 - _VSTD::advance(__m, __len2); - // recurse on [__first, __m-1], except reduce __m-1 until *(__m-1) is true, *__first know to be false - // F????????????????T - // f m l - _BidirectionalIterator __m1 = __m; - _BidirectionalIterator __first_false = __first; - _Distance __len_half = __len2; - while (!__pred(*--__m1)) - { - if (__m1 == __first) - goto __first_half_done; - --__len_half; - } - // F???TFFF?????????T - // f m1 m l - typedef typename add_lvalue_reference<_Predicate>::type _PredRef; - __first_false = _VSTD::__stable_partition<_PredRef>(__first, __m1, __pred, __len_half, __p, __bit); -__first_half_done: - // TTTFFFFF?????????T - // f ff m l - // recurse on [__m, __last], except increase __m until *(__m) is false, *__last know to be true - __m1 = __m; - _BidirectionalIterator __second_false = __last; - ++__second_false; - __len_half = __len - __len2; - while (__pred(*__m1)) - { - if (++__m1 == __last) - goto __second_half_done; - --__len_half; - } - // TTTFFFFFTTTF?????T - // f ff m m1 l - __second_false = _VSTD::__stable_partition<_PredRef>(__m1, __last, __pred, __len_half, __p, __bit); -__second_half_done: - // TTTFFFFFTTTTTFFFFF - // f ff m sf l - return _VSTD::rotate(__first_false, __m, __second_false); - // TTTTTTTTFFFFFFFFFF - // | -} - -template -_BidirectionalIterator -__stable_partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, - bidirectional_iterator_tag) -{ - typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; - typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; - const difference_type __alloc_limit = 4; // might want to make this a function of trivial assignment - // Either prove all true and return __first or point to first false - while (true) - { - if (__first == __last) - return __first; - if (!__pred(*__first)) - break; - ++__first; - } - // __first points to first false, everything prior to __first is already set. - // Either prove [__first, __last) is all false and return __first, or point __last to last true - do - { - if (__first == --__last) - return __first; - } while (!__pred(*__last)); - // We now have a reduced range [__first, __last] - // *__first is known to be false - // *__last is known to be true - // __len >= 2 - difference_type __len = _VSTD::distance(__first, __last) + 1; - pair __p(0, 0); - unique_ptr __h; - if (__len >= __alloc_limit) - { - __p = _VSTD::get_temporary_buffer(__len); - __h.reset(__p.first); - } - return _VSTD::__stable_partition::type> - (__first, __last, __pred, __len, __p, bidirectional_iterator_tag()); -} - -template -inline _LIBCPP_INLINE_VISIBILITY -_ForwardIterator -stable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) -{ - return _VSTD::__stable_partition::type> - (__first, __last, __pred, typename iterator_traits<_ForwardIterator>::iterator_category()); -} - -// is_sorted_until - -template -_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator -is_sorted_until(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) -{ - if (__first != __last) - { - _ForwardIterator __i = __first; - while (++__i != __last) - { - if (__comp(*__i, *__first)) - return __i; - __first = __i; - } - } - return __last; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator -is_sorted_until(_ForwardIterator __first, _ForwardIterator __last) -{ - return _VSTD::is_sorted_until(__first, __last, __less::value_type>()); -} - -// is_sorted - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -is_sorted(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) -{ - return _VSTD::is_sorted_until(__first, __last, __comp) == __last; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -is_sorted(_ForwardIterator __first, _ForwardIterator __last) -{ - return _VSTD::is_sorted(__first, __last, __less::value_type>()); -} - -// sort - -// stable, 2-3 compares, 0-2 swaps - -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 unsigned -__sort3(_ForwardIterator __x, _ForwardIterator __y, _ForwardIterator __z, _Compare __c) -{ - unsigned __r = 0; - if (!__c(*__y, *__x)) // if x <= y - { - if (!__c(*__z, *__y)) // if y <= z - return __r; // x <= y && y <= z - // x <= y && y > z - swap(*__y, *__z); // x <= z && y < z - __r = 1; - if (__c(*__y, *__x)) // if x > y - { - swap(*__x, *__y); // x < y && y <= z - __r = 2; - } - return __r; // x <= y && y < z - } - if (__c(*__z, *__y)) // x > y, if y > z - { - swap(*__x, *__z); // x < y && y < z - __r = 1; - return __r; - } - swap(*__x, *__y); // x > y && y <= z - __r = 1; // x < y && x <= z - if (__c(*__z, *__y)) // if y > z - { - swap(*__y, *__z); // x <= y && y < z - __r = 2; - } - return __r; -} // x <= y && y <= z - -// stable, 3-6 compares, 0-5 swaps - -template -unsigned -__sort4(_ForwardIterator __x1, _ForwardIterator __x2, _ForwardIterator __x3, - _ForwardIterator __x4, _Compare __c) -{ - unsigned __r = _VSTD::__sort3<_Compare>(__x1, __x2, __x3, __c); - if (__c(*__x4, *__x3)) - { - swap(*__x3, *__x4); - ++__r; - if (__c(*__x3, *__x2)) - { - swap(*__x2, *__x3); - ++__r; - if (__c(*__x2, *__x1)) - { - swap(*__x1, *__x2); - ++__r; - } - } - } - return __r; -} - -// stable, 4-10 compares, 0-9 swaps - -template -_LIBCPP_HIDDEN -unsigned -__sort5(_ForwardIterator __x1, _ForwardIterator __x2, _ForwardIterator __x3, - _ForwardIterator __x4, _ForwardIterator __x5, _Compare __c) -{ - unsigned __r = _VSTD::__sort4<_Compare>(__x1, __x2, __x3, __x4, __c); - if (__c(*__x5, *__x4)) - { - swap(*__x4, *__x5); - ++__r; - if (__c(*__x4, *__x3)) - { - swap(*__x3, *__x4); - ++__r; - if (__c(*__x3, *__x2)) - { - swap(*__x2, *__x3); - ++__r; - if (__c(*__x2, *__x1)) - { - swap(*__x1, *__x2); - ++__r; - } - } - } - } - return __r; -} - -// Assumes size > 0 -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 void -__selection_sort(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) -{ - _BidirectionalIterator __lm1 = __last; - for (--__lm1; __first != __lm1; ++__first) - { - _BidirectionalIterator __i = _VSTD::min_element<_BidirectionalIterator, - typename add_lvalue_reference<_Compare>::type> - (__first, __last, __comp); - if (__i != __first) - swap(*__first, *__i); - } -} - -template -void -__insertion_sort(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) -{ - typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; - if (__first != __last) - { - _BidirectionalIterator __i = __first; - for (++__i; __i != __last; ++__i) - { - _BidirectionalIterator __j = __i; - value_type __t(_VSTD::move(*__j)); - for (_BidirectionalIterator __k = __i; __k != __first && __comp(__t, *--__k); --__j) - *__j = _VSTD::move(*__k); - *__j = _VSTD::move(__t); - } - } -} - -template -void -__insertion_sort_3(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; - _RandomAccessIterator __j = __first+2; - _VSTD::__sort3<_Compare>(__first, __first+1, __j, __comp); - for (_RandomAccessIterator __i = __j+1; __i != __last; ++__i) - { - if (__comp(*__i, *__j)) - { - value_type __t(_VSTD::move(*__i)); - _RandomAccessIterator __k = __j; - __j = __i; - do - { - *__j = _VSTD::move(*__k); - __j = __k; - } while (__j != __first && __comp(__t, *--__k)); - *__j = _VSTD::move(__t); - } - __j = __i; - } -} - -template -bool -__insertion_sort_incomplete(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - switch (__last - __first) - { - case 0: - case 1: - return true; - case 2: - if (__comp(*--__last, *__first)) - swap(*__first, *__last); - return true; - case 3: - _VSTD::__sort3<_Compare>(__first, __first+1, --__last, __comp); - return true; - case 4: - _VSTD::__sort4<_Compare>(__first, __first+1, __first+2, --__last, __comp); - return true; - case 5: - _VSTD::__sort5<_Compare>(__first, __first+1, __first+2, __first+3, --__last, __comp); - return true; - } - typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; - _RandomAccessIterator __j = __first+2; - _VSTD::__sort3<_Compare>(__first, __first+1, __j, __comp); - const unsigned __limit = 8; - unsigned __count = 0; - for (_RandomAccessIterator __i = __j+1; __i != __last; ++__i) - { - if (__comp(*__i, *__j)) - { - value_type __t(_VSTD::move(*__i)); - _RandomAccessIterator __k = __j; - __j = __i; - do - { - *__j = _VSTD::move(*__k); - __j = __k; - } while (__j != __first && __comp(__t, *--__k)); - *__j = _VSTD::move(__t); - if (++__count == __limit) - return ++__i == __last; - } - __j = __i; - } - return true; -} - -template -void -__insertion_sort_move(_BidirectionalIterator __first1, _BidirectionalIterator __last1, - typename iterator_traits<_BidirectionalIterator>::value_type* __first2, _Compare __comp) -{ - typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; - if (__first1 != __last1) - { - __destruct_n __d(0); - unique_ptr __h(__first2, __d); - value_type* __last2 = __first2; - ::new ((void*)__last2) value_type(_VSTD::move(*__first1)); - __d.template __incr(); - for (++__last2; ++__first1 != __last1; ++__last2) - { - value_type* __j2 = __last2; - value_type* __i2 = __j2; - if (__comp(*__first1, *--__i2)) - { - ::new ((void*)__j2) value_type(_VSTD::move(*__i2)); - __d.template __incr(); - for (--__j2; __i2 != __first2 && __comp(*__first1, *--__i2); --__j2) - *__j2 = _VSTD::move(*__i2); - *__j2 = _VSTD::move(*__first1); - } - else - { - ::new ((void*)__j2) value_type(_VSTD::move(*__first1)); - __d.template __incr(); - } - } - __h.release(); - } -} - -template -void -__sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; - const difference_type __limit = is_trivially_copy_constructible::value && - is_trivially_copy_assignable::value ? 30 : 6; - while (true) - { - __restart: - difference_type __len = __last - __first; - switch (__len) - { - case 0: - case 1: - return; - case 2: - if (__comp(*--__last, *__first)) - swap(*__first, *__last); - return; - case 3: - _VSTD::__sort3<_Compare>(__first, __first+1, --__last, __comp); - return; - case 4: - _VSTD::__sort4<_Compare>(__first, __first+1, __first+2, --__last, __comp); - return; - case 5: - _VSTD::__sort5<_Compare>(__first, __first+1, __first+2, __first+3, --__last, __comp); - return; - } - if (__len <= __limit) - { - _VSTD::__insertion_sort_3<_Compare>(__first, __last, __comp); - return; - } - // __len > 5 - _RandomAccessIterator __m = __first; - _RandomAccessIterator __lm1 = __last; - --__lm1; - unsigned __n_swaps; - { - difference_type __delta; - if (__len >= 1000) - { - __delta = __len/2; - __m += __delta; - __delta /= 2; - __n_swaps = _VSTD::__sort5<_Compare>(__first, __first + __delta, __m, __m+__delta, __lm1, __comp); - } - else - { - __delta = __len/2; - __m += __delta; - __n_swaps = _VSTD::__sort3<_Compare>(__first, __m, __lm1, __comp); - } - } - // *__m is median - // partition [__first, __m) < *__m and *__m <= [__m, __last) - // (this inhibits tossing elements equivalent to __m around unnecessarily) - _RandomAccessIterator __i = __first; - _RandomAccessIterator __j = __lm1; - // j points beyond range to be tested, *__m is known to be <= *__lm1 - // The search going up is known to be guarded but the search coming down isn't. - // Prime the downward search with a guard. - if (!__comp(*__i, *__m)) // if *__first == *__m - { - // *__first == *__m, *__first doesn't go in first part - // manually guard downward moving __j against __i - while (true) - { - if (__i == --__j) - { - // *__first == *__m, *__m <= all other elements - // Parition instead into [__first, __i) == *__first and *__first < [__i, __last) - ++__i; // __first + 1 - __j = __last; - if (!__comp(*__first, *--__j)) // we need a guard if *__first == *(__last-1) - { - while (true) - { - if (__i == __j) - return; // [__first, __last) all equivalent elements - if (__comp(*__first, *__i)) - { - swap(*__i, *__j); - ++__n_swaps; - ++__i; - break; - } - ++__i; - } - } - // [__first, __i) == *__first and *__first < [__j, __last) and __j == __last - 1 - if (__i == __j) - return; - while (true) - { - while (!__comp(*__first, *__i)) - ++__i; - while (__comp(*__first, *--__j)) - ; - if (__i >= __j) - break; - swap(*__i, *__j); - ++__n_swaps; - ++__i; - } - // [__first, __i) == *__first and *__first < [__i, __last) - // The first part is sorted, sort the second part - // _VSTD::__sort<_Compare>(__i, __last, __comp); - __first = __i; - goto __restart; - } - if (__comp(*__j, *__m)) - { - swap(*__i, *__j); - ++__n_swaps; - break; // found guard for downward moving __j, now use unguarded partition - } - } - } - // It is known that *__i < *__m - ++__i; - // j points beyond range to be tested, *__m is known to be <= *__lm1 - // if not yet partitioned... - if (__i < __j) - { - // known that *(__i - 1) < *__m - // known that __i <= __m - while (true) - { - // __m still guards upward moving __i - while (__comp(*__i, *__m)) - ++__i; - // It is now known that a guard exists for downward moving __j - while (!__comp(*--__j, *__m)) - ; - if (__i > __j) - break; - swap(*__i, *__j); - ++__n_swaps; - // It is known that __m != __j - // If __m just moved, follow it - if (__m == __i) - __m = __j; - ++__i; - } - } - // [__first, __i) < *__m and *__m <= [__i, __last) - if (__i != __m && __comp(*__m, *__i)) - { - swap(*__i, *__m); - ++__n_swaps; - } - // [__first, __i) < *__i and *__i <= [__i+1, __last) - // If we were given a perfect partition, see if insertion sort is quick... - if (__n_swaps == 0) - { - bool __fs = _VSTD::__insertion_sort_incomplete<_Compare>(__first, __i, __comp); - if (_VSTD::__insertion_sort_incomplete<_Compare>(__i+1, __last, __comp)) - { - if (__fs) - return; - __last = __i; - continue; - } - else - { - if (__fs) - { - __first = ++__i; - continue; - } - } - } - // sort smaller range with recursive call and larger with tail recursion elimination - if (__i - __first < __last - __i) - { - _VSTD::__sort<_Compare>(__first, __i, __comp); - // _VSTD::__sort<_Compare>(__i+1, __last, __comp); - __first = ++__i; - } - else - { - _VSTD::__sort<_Compare>(__i+1, __last, __comp); - // _VSTD::__sort<_Compare>(__first, __i, __comp); - __last = __i; - } - } -} - -template -inline _LIBCPP_INLINE_VISIBILITY -void -__sort(_Tp** __first, _Tp** __last, __less<_Tp*>&) -{ - __less __comp; - _VSTD::__sort<__less&, uintptr_t*>((uintptr_t*)__first, (uintptr_t*)__last, __comp); -} - -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, char*>(char*, char*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, wchar_t*>(wchar_t*, wchar_t*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, signed char*>(signed char*, signed char*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, unsigned char*>(unsigned char*, unsigned char*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, short*>(short*, short*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, unsigned short*>(unsigned short*, unsigned short*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, int*>(int*, int*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, unsigned*>(unsigned*, unsigned*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, long*>(long*, long*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, unsigned long*>(unsigned long*, unsigned long*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, long long*>(long long*, long long*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, unsigned long long*>(unsigned long long*, unsigned long long*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, float*>(float*, float*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, double*>(double*, double*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less&, long double*>(long double*, long double*, __less&)) - -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, char*>(char*, char*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, wchar_t*>(wchar_t*, wchar_t*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, signed char*>(signed char*, signed char*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, unsigned char*>(unsigned char*, unsigned char*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, short*>(short*, short*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, unsigned short*>(unsigned short*, unsigned short*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, int*>(int*, int*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, unsigned*>(unsigned*, unsigned*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, long*>(long*, long*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, unsigned long*>(unsigned long*, unsigned long*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, long long*>(long long*, long long*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, unsigned long long*>(unsigned long long*, unsigned long long*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, float*>(float*, float*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, double*>(double*, double*, __less&)) -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less&, long double*>(long double*, long double*, __less&)) - -_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS unsigned __sort5<__less&, long double*>(long double*, long double*, long double*, long double*, long double*, __less&)) - -// lower_bound - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator -__lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) -{ - typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; - difference_type __len = _VSTD::distance(__first, __last); - while (__len != 0) - { - difference_type __l2 = _VSTD::__half_positive(__len); - _ForwardIterator __m = __first; - _VSTD::advance(__m, __l2); - if (__comp(*__m, __value_)) - { - __first = ++__m; - __len -= __l2 + 1; - } - else - __len = __l2; - } - return __first; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator -lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) -{ - typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; - return _VSTD::__lower_bound<_Comp_ref>(__first, __last, __value_, __comp); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator -lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) -{ - return _VSTD::lower_bound(__first, __last, __value_, - __less::value_type, _Tp>()); -} - -// upper_bound - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator -__upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) -{ - typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; - difference_type __len = _VSTD::distance(__first, __last); - while (__len != 0) - { - difference_type __l2 = _VSTD::__half_positive(__len); - _ForwardIterator __m = __first; - _VSTD::advance(__m, __l2); - if (__comp(__value_, *__m)) - __len = __l2; - else - { - __first = ++__m; - __len -= __l2 + 1; - } - } - return __first; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator -upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) -{ - typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; - return _VSTD::__upper_bound<_Comp_ref>(__first, __last, __value_, __comp); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_ForwardIterator -upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) -{ - return _VSTD::upper_bound(__first, __last, __value_, - __less<_Tp, typename iterator_traits<_ForwardIterator>::value_type>()); -} - -// equal_range - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 pair<_ForwardIterator, _ForwardIterator> -__equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) -{ - typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; - difference_type __len = _VSTD::distance(__first, __last); - while (__len != 0) - { - difference_type __l2 = _VSTD::__half_positive(__len); - _ForwardIterator __m = __first; - _VSTD::advance(__m, __l2); - if (__comp(*__m, __value_)) - { - __first = ++__m; - __len -= __l2 + 1; - } - else if (__comp(__value_, *__m)) - { - __last = __m; - __len = __l2; - } - else - { - _ForwardIterator __mp1 = __m; - return pair<_ForwardIterator, _ForwardIterator> - ( - _VSTD::__lower_bound<_Compare>(__first, __m, __value_, __comp), - _VSTD::__upper_bound<_Compare>(++__mp1, __last, __value_, __comp) - ); - } - } - return pair<_ForwardIterator, _ForwardIterator>(__first, __first); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -pair<_ForwardIterator, _ForwardIterator> -equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__equal_range<_Comp_ref>(__first, __last, __value_, __comp); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -pair<_ForwardIterator, _ForwardIterator> -equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) -{ - return _VSTD::equal_range(__first, __last, __value_, - __less::value_type, _Tp>()); -} - -// binary_search - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -__binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) -{ - __first = _VSTD::__lower_bound<_Compare>(__first, __last, __value_, __comp); - return __first != __last && !__comp(__value_, *__first); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__binary_search<_Comp_ref>(__first, __last, __value_, __comp); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) -{ - return _VSTD::binary_search(__first, __last, __value_, - __less::value_type, _Tp>()); -} - -// merge - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -__merge(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) -{ - for (; __first1 != __last1; ++__result) - { - if (__first2 == __last2) - return _VSTD::copy(__first1, __last1, __result); - if (__comp(*__first2, *__first1)) - { - *__result = *__first2; - ++__first2; - } - else - { - *__result = *__first1; - ++__first1; - } - } - return _VSTD::copy(__first2, __last2, __result); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -merge(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__merge<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -merge(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) -{ - typedef typename iterator_traits<_InputIterator1>::value_type __v1; - typedef typename iterator_traits<_InputIterator2>::value_type __v2; - return _VSTD::merge(__first1, __last1, __first2, __last2, __result, __less<__v1, __v2>()); -} - -// inplace_merge - -template -void __half_inplace_merge(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, - _OutputIterator __result, _Compare __comp) -{ - for (; __first1 != __last1; ++__result) - { - if (__first2 == __last2) - { - _VSTD::move(__first1, __last1, __result); - return; - } - - if (__comp(*__first2, *__first1)) - { - *__result = _VSTD::move(*__first2); - ++__first2; - } - else - { - *__result = _VSTD::move(*__first1); - ++__first1; - } - } - // __first2 through __last2 are already in the right spot. -} - -template -void -__buffered_inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, - _Compare __comp, typename iterator_traits<_BidirectionalIterator>::difference_type __len1, - typename iterator_traits<_BidirectionalIterator>::difference_type __len2, - typename iterator_traits<_BidirectionalIterator>::value_type* __buff) -{ - typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; - __destruct_n __d(0); - unique_ptr __h2(__buff, __d); - if (__len1 <= __len2) - { - value_type* __p = __buff; - for (_BidirectionalIterator __i = __first; __i != __middle; __d.template __incr(), (void) ++__i, (void) ++__p) - ::new ((void*)__p) value_type(_VSTD::move(*__i)); - _VSTD::__half_inplace_merge<_Compare>(__buff, __p, __middle, __last, __first, __comp); - } - else - { - value_type* __p = __buff; - for (_BidirectionalIterator __i = __middle; __i != __last; __d.template __incr(), (void) ++__i, (void) ++__p) - ::new ((void*)__p) value_type(_VSTD::move(*__i)); - typedef reverse_iterator<_BidirectionalIterator> _RBi; - typedef reverse_iterator _Rv; - typedef __invert<_Compare> _Inverted; - _VSTD::__half_inplace_merge<_Inverted>(_Rv(__p), _Rv(__buff), - _RBi(__middle), _RBi(__first), - _RBi(__last), _Inverted(__comp)); - } -} - -template -void -__inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, - _Compare __comp, typename iterator_traits<_BidirectionalIterator>::difference_type __len1, - typename iterator_traits<_BidirectionalIterator>::difference_type __len2, - typename iterator_traits<_BidirectionalIterator>::value_type* __buff, ptrdiff_t __buff_size) -{ - typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; - while (true) - { - // if __middle == __last, we're done - if (__len2 == 0) - return; - if (__len1 <= __buff_size || __len2 <= __buff_size) - return _VSTD::__buffered_inplace_merge<_Compare> - (__first, __middle, __last, __comp, __len1, __len2, __buff); - // shrink [__first, __middle) as much as possible (with no moves), returning if it shrinks to 0 - for (; true; ++__first, (void) --__len1) - { - if (__len1 == 0) - return; - if (__comp(*__middle, *__first)) - break; - } - // __first < __middle < __last - // *__first > *__middle - // partition [__first, __m1) [__m1, __middle) [__middle, __m2) [__m2, __last) such that - // all elements in: - // [__first, __m1) <= [__middle, __m2) - // [__middle, __m2) < [__m1, __middle) - // [__m1, __middle) <= [__m2, __last) - // and __m1 or __m2 is in the middle of its range - _BidirectionalIterator __m1; // "median" of [__first, __middle) - _BidirectionalIterator __m2; // "median" of [__middle, __last) - difference_type __len11; // distance(__first, __m1) - difference_type __len21; // distance(__middle, __m2) - // binary search smaller range - if (__len1 < __len2) - { // __len >= 1, __len2 >= 2 - __len21 = __len2 / 2; - __m2 = __middle; - _VSTD::advance(__m2, __len21); - __m1 = _VSTD::__upper_bound<_Compare>(__first, __middle, *__m2, __comp); - __len11 = _VSTD::distance(__first, __m1); - } - else - { - if (__len1 == 1) - { // __len1 >= __len2 && __len2 > 0, therefore __len2 == 1 - // It is known *__first > *__middle - swap(*__first, *__middle); - return; - } - // __len1 >= 2, __len2 >= 1 - __len11 = __len1 / 2; - __m1 = __first; - _VSTD::advance(__m1, __len11); - __m2 = _VSTD::__lower_bound<_Compare>(__middle, __last, *__m1, __comp); - __len21 = _VSTD::distance(__middle, __m2); - } - difference_type __len12 = __len1 - __len11; // distance(__m1, __middle) - difference_type __len22 = __len2 - __len21; // distance(__m2, __last) - // [__first, __m1) [__m1, __middle) [__middle, __m2) [__m2, __last) - // swap middle two partitions - __middle = _VSTD::rotate(__m1, __middle, __m2); - // __len12 and __len21 now have swapped meanings - // merge smaller range with recursive call and larger with tail recursion elimination - if (__len11 + __len21 < __len12 + __len22) - { - _VSTD::__inplace_merge<_Compare>(__first, __m1, __middle, __comp, __len11, __len21, __buff, __buff_size); -// _VSTD::__inplace_merge<_Compare>(__middle, __m2, __last, __comp, __len12, __len22, __buff, __buff_size); - __first = __middle; - __middle = __m2; - __len1 = __len12; - __len2 = __len22; - } - else - { - _VSTD::__inplace_merge<_Compare>(__middle, __m2, __last, __comp, __len12, __len22, __buff, __buff_size); -// _VSTD::__inplace_merge<_Compare>(__first, __m1, __middle, __comp, __len11, __len21, __buff, __buff_size); - __last = __middle; - __middle = __m1; - __len1 = __len11; - __len2 = __len21; - } - } -} - -template -inline _LIBCPP_INLINE_VISIBILITY -void -inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, - _Compare __comp) -{ - typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; - typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; - difference_type __len1 = _VSTD::distance(__first, __middle); - difference_type __len2 = _VSTD::distance(__middle, __last); - difference_type __buf_size = _VSTD::min(__len1, __len2); - pair __buf = _VSTD::get_temporary_buffer(__buf_size); - unique_ptr __h(__buf.first); - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__inplace_merge<_Comp_ref>(__first, __middle, __last, __comp, __len1, __len2, - __buf.first, __buf.second); -} - -template -inline _LIBCPP_INLINE_VISIBILITY -void -inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last) -{ - _VSTD::inplace_merge(__first, __middle, __last, - __less::value_type>()); -} - -// stable_sort - -template -void -__merge_move_construct(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, - typename iterator_traits<_InputIterator1>::value_type* __result, _Compare __comp) -{ - typedef typename iterator_traits<_InputIterator1>::value_type value_type; - __destruct_n __d(0); - unique_ptr __h(__result, __d); - for (; true; ++__result) - { - if (__first1 == __last1) - { - for (; __first2 != __last2; ++__first2, ++__result, (void)__d.template __incr()) - ::new ((void*)__result) value_type(_VSTD::move(*__first2)); - __h.release(); - return; - } - if (__first2 == __last2) - { - for (; __first1 != __last1; ++__first1, ++__result, (void)__d.template __incr()) - ::new ((void*)__result) value_type(_VSTD::move(*__first1)); - __h.release(); - return; - } - if (__comp(*__first2, *__first1)) - { - ::new ((void*)__result) value_type(_VSTD::move(*__first2)); - __d.template __incr(); - ++__first2; - } - else - { - ::new ((void*)__result) value_type(_VSTD::move(*__first1)); - __d.template __incr(); - ++__first1; - } - } -} - -template -void -__merge_move_assign(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, - _OutputIterator __result, _Compare __comp) -{ - for (; __first1 != __last1; ++__result) - { - if (__first2 == __last2) - { - for (; __first1 != __last1; ++__first1, (void) ++__result) - *__result = _VSTD::move(*__first1); - return; - } - if (__comp(*__first2, *__first1)) - { - *__result = _VSTD::move(*__first2); - ++__first2; - } - else - { - *__result = _VSTD::move(*__first1); - ++__first1; - } - } - for (; __first2 != __last2; ++__first2, (void) ++__result) - *__result = _VSTD::move(*__first2); -} - -template -void -__stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, - typename iterator_traits<_RandomAccessIterator>::difference_type __len, - typename iterator_traits<_RandomAccessIterator>::value_type* __buff, ptrdiff_t __buff_size); - -template -void -__stable_sort_move(_RandomAccessIterator __first1, _RandomAccessIterator __last1, _Compare __comp, - typename iterator_traits<_RandomAccessIterator>::difference_type __len, - typename iterator_traits<_RandomAccessIterator>::value_type* __first2) -{ - typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; - switch (__len) - { - case 0: - return; - case 1: - ::new ((void*)__first2) value_type(_VSTD::move(*__first1)); - return; - case 2: - __destruct_n __d(0); - unique_ptr __h2(__first2, __d); - if (__comp(*--__last1, *__first1)) - { - ::new ((void*)__first2) value_type(_VSTD::move(*__last1)); - __d.template __incr(); - ++__first2; - ::new ((void*)__first2) value_type(_VSTD::move(*__first1)); - } - else - { - ::new ((void*)__first2) value_type(_VSTD::move(*__first1)); - __d.template __incr(); - ++__first2; - ::new ((void*)__first2) value_type(_VSTD::move(*__last1)); - } - __h2.release(); - return; - } - if (__len <= 8) - { - _VSTD::__insertion_sort_move<_Compare>(__first1, __last1, __first2, __comp); - return; - } - typename iterator_traits<_RandomAccessIterator>::difference_type __l2 = __len / 2; - _RandomAccessIterator __m = __first1 + __l2; - _VSTD::__stable_sort<_Compare>(__first1, __m, __comp, __l2, __first2, __l2); - _VSTD::__stable_sort<_Compare>(__m, __last1, __comp, __len - __l2, __first2 + __l2, __len - __l2); - _VSTD::__merge_move_construct<_Compare>(__first1, __m, __m, __last1, __first2, __comp); -} - -template -struct __stable_sort_switch -{ - static const unsigned value = 128*is_trivially_copy_assignable<_Tp>::value; -}; - -template -void -__stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, - typename iterator_traits<_RandomAccessIterator>::difference_type __len, - typename iterator_traits<_RandomAccessIterator>::value_type* __buff, ptrdiff_t __buff_size) -{ - typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - switch (__len) - { - case 0: - case 1: - return; - case 2: - if (__comp(*--__last, *__first)) - swap(*__first, *__last); - return; - } - if (__len <= static_cast(__stable_sort_switch::value)) - { - _VSTD::__insertion_sort<_Compare>(__first, __last, __comp); - return; - } - typename iterator_traits<_RandomAccessIterator>::difference_type __l2 = __len / 2; - _RandomAccessIterator __m = __first + __l2; - if (__len <= __buff_size) - { - __destruct_n __d(0); - unique_ptr __h2(__buff, __d); - _VSTD::__stable_sort_move<_Compare>(__first, __m, __comp, __l2, __buff); - __d.__set(__l2, (value_type*)nullptr); - _VSTD::__stable_sort_move<_Compare>(__m, __last, __comp, __len - __l2, __buff + __l2); - __d.__set(__len, (value_type*)nullptr); - _VSTD::__merge_move_assign<_Compare>(__buff, __buff + __l2, __buff + __l2, __buff + __len, __first, __comp); -// _VSTD::__merge<_Compare>(move_iterator(__buff), -// move_iterator(__buff + __l2), -// move_iterator<_RandomAccessIterator>(__buff + __l2), -// move_iterator<_RandomAccessIterator>(__buff + __len), -// __first, __comp); - return; - } - _VSTD::__stable_sort<_Compare>(__first, __m, __comp, __l2, __buff, __buff_size); - _VSTD::__stable_sort<_Compare>(__m, __last, __comp, __len - __l2, __buff, __buff_size); - _VSTD::__inplace_merge<_Compare>(__first, __m, __last, __comp, __l2, __len - __l2, __buff, __buff_size); -} - -template -inline _LIBCPP_INLINE_VISIBILITY -void -stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - difference_type __len = __last - __first; - pair __buf(0, 0); - unique_ptr __h; - if (__len > static_cast(__stable_sort_switch::value)) - { - __buf = _VSTD::get_temporary_buffer(__len); - __h.reset(__buf.first); - } - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - _VSTD::__stable_sort<_Comp_ref>(__first, __last, __comp, __len, __buf.first, __buf.second); -} - -template -inline _LIBCPP_INLINE_VISIBILITY -void -stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last) -{ - _VSTD::stable_sort(__first, __last, __less::value_type>()); -} - -// is_heap_until - -template -_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_AFTER_CXX17 _RandomAccessIterator -is_heap_until(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - difference_type __len = __last - __first; - difference_type __p = 0; - difference_type __c = 1; - _RandomAccessIterator __pp = __first; - while (__c < __len) - { - _RandomAccessIterator __cp = __first + __c; - if (__comp(*__pp, *__cp)) - return __cp; - ++__c; - ++__cp; - if (__c == __len) - return __last; - if (__comp(*__pp, *__cp)) - return __cp; - ++__p; - ++__pp; - __c = 2 * __p + 1; - } - return __last; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_RandomAccessIterator -is_heap_until(_RandomAccessIterator __first, _RandomAccessIterator __last) -{ - return _VSTD::is_heap_until(__first, __last, __less::value_type>()); -} - -// is_heap - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -is_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - return _VSTD::is_heap_until(__first, __last, __comp) == __last; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -is_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) -{ - return _VSTD::is_heap(__first, __last, __less::value_type>()); -} - -// push_heap - -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 void -__sift_up(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, - typename iterator_traits<_RandomAccessIterator>::difference_type __len) -{ - typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; - if (__len > 1) - { - __len = (__len - 2) / 2; - _RandomAccessIterator __ptr = __first + __len; - if (__comp(*__ptr, *--__last)) - { - value_type __t(_VSTD::move(*__last)); - do - { - *__last = _VSTD::move(*__ptr); - __last = __ptr; - if (__len == 0) - break; - __len = (__len - 1) / 2; - __ptr = __first + __len; - } while (__comp(*__ptr, __t)); - *__last = _VSTD::move(__t); - } - } -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - _VSTD::__sift_up<_Comp_ref>(__first, __last, __comp, __last - __first); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) -{ - _VSTD::push_heap(__first, __last, __less::value_type>()); -} - -// pop_heap - -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 void -__sift_down(_RandomAccessIterator __first, _RandomAccessIterator /*__last*/, - _Compare __comp, - typename iterator_traits<_RandomAccessIterator>::difference_type __len, - _RandomAccessIterator __start) -{ - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; - // left-child of __start is at 2 * __start + 1 - // right-child of __start is at 2 * __start + 2 - difference_type __child = __start - __first; - - if (__len < 2 || (__len - 2) / 2 < __child) - return; - - __child = 2 * __child + 1; - _RandomAccessIterator __child_i = __first + __child; - - if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) { - // right-child exists and is greater than left-child - ++__child_i; - ++__child; - } - - // check if we are in heap-order - if (__comp(*__child_i, *__start)) - // we are, __start is larger than it's largest child - return; - - value_type __top(_VSTD::move(*__start)); - do - { - // we are not in heap-order, swap the parent with its largest child - *__start = _VSTD::move(*__child_i); - __start = __child_i; - - if ((__len - 2) / 2 < __child) - break; - - // recompute the child based off of the updated parent - __child = 2 * __child + 1; - __child_i = __first + __child; - - if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) { - // right-child exists and is greater than left-child - ++__child_i; - ++__child; - } - - // check if we are in heap-order - } while (!__comp(*__child_i, __top)); - *__start = _VSTD::move(__top); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -__pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, - typename iterator_traits<_RandomAccessIterator>::difference_type __len) -{ - if (__len > 1) - { - swap(*__first, *--__last); - _VSTD::__sift_down<_Compare>(__first, __last, __comp, __len - 1, __first); - } -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - _VSTD::__pop_heap<_Comp_ref>(__first, __last, __comp, __last - __first); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) -{ - _VSTD::pop_heap(__first, __last, __less::value_type>()); -} - -// make_heap - -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 void -__make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - difference_type __n = __last - __first; - if (__n > 1) - { - // start from the first parent, there is no need to consider children - for (difference_type __start = (__n - 2) / 2; __start >= 0; --__start) - { - _VSTD::__sift_down<_Compare>(__first, __last, __comp, __n, __first + __start); - } - } -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - _VSTD::__make_heap<_Comp_ref>(__first, __last, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) -{ - _VSTD::make_heap(__first, __last, __less::value_type>()); -} - -// sort_heap - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 void -__sort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - for (difference_type __n = __last - __first; __n > 1; --__last, (void) --__n) - _VSTD::__pop_heap<_Compare>(__first, __last, __comp, __n); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -sort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - _VSTD::__sort_heap<_Comp_ref>(__first, __last, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -sort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) -{ - _VSTD::sort_heap(__first, __last, __less::value_type>()); -} - -// partial_sort - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 void -__partial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, - _Compare __comp) -{ - _VSTD::__make_heap<_Compare>(__first, __middle, __comp); - typename iterator_traits<_RandomAccessIterator>::difference_type __len = __middle - __first; - for (_RandomAccessIterator __i = __middle; __i != __last; ++__i) - { - if (__comp(*__i, *__first)) - { - swap(*__i, *__first); - _VSTD::__sift_down<_Compare>(__first, __middle, __comp, __len, __first); - } - } - _VSTD::__sort_heap<_Compare>(__first, __middle, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -partial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, - _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - _VSTD::__partial_sort<_Comp_ref>(__first, __middle, __last, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -partial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last) -{ - _VSTD::partial_sort(__first, __middle, __last, - __less::value_type>()); -} - -// partial_sort_copy - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _RandomAccessIterator -__partial_sort_copy(_InputIterator __first, _InputIterator __last, - _RandomAccessIterator __result_first, _RandomAccessIterator __result_last, _Compare __comp) -{ - _RandomAccessIterator __r = __result_first; - if (__r != __result_last) - { - for (; __first != __last && __r != __result_last; ++__first, (void) ++__r) - *__r = *__first; - _VSTD::__make_heap<_Compare>(__result_first, __r, __comp); - typename iterator_traits<_RandomAccessIterator>::difference_type __len = __r - __result_first; - for (; __first != __last; ++__first) - if (__comp(*__first, *__result_first)) - { - *__result_first = *__first; - _VSTD::__sift_down<_Compare>(__result_first, __r, __comp, __len, __result_first); - } - _VSTD::__sort_heap<_Compare>(__result_first, __r, __comp); - } - return __r; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_RandomAccessIterator -partial_sort_copy(_InputIterator __first, _InputIterator __last, - _RandomAccessIterator __result_first, _RandomAccessIterator __result_last, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__partial_sort_copy<_Comp_ref>(__first, __last, __result_first, __result_last, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_RandomAccessIterator -partial_sort_copy(_InputIterator __first, _InputIterator __last, - _RandomAccessIterator __result_first, _RandomAccessIterator __result_last) -{ - return _VSTD::partial_sort_copy(__first, __last, __result_first, __result_last, - __less::value_type>()); -} - -// nth_element - -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 bool -__nth_element_find_guard(_RandomAccessIterator& __i, _RandomAccessIterator& __j, - _RandomAccessIterator __m, _Compare __comp) -{ - // manually guard downward moving __j against __i - while (true) { - if (__i == --__j) { - return false; - } - if (__comp(*__j, *__m)) { - return true; // found guard for downward moving __j, now use unguarded partition - } - } -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 void -__nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last, _Compare __comp) -{ - // _Compare is known to be a reference type - typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; - const difference_type __limit = 7; - while (true) - { - if (__nth == __last) - return; - difference_type __len = __last - __first; - switch (__len) - { - case 0: - case 1: - return; - case 2: - if (__comp(*--__last, *__first)) - swap(*__first, *__last); - return; - case 3: - { - _RandomAccessIterator __m = __first; - _VSTD::__sort3<_Compare>(__first, ++__m, --__last, __comp); - return; - } - } - if (__len <= __limit) - { - _VSTD::__selection_sort<_Compare>(__first, __last, __comp); - return; - } - // __len > __limit >= 3 - _RandomAccessIterator __m = __first + __len/2; - _RandomAccessIterator __lm1 = __last; - unsigned __n_swaps = _VSTD::__sort3<_Compare>(__first, __m, --__lm1, __comp); - // *__m is median - // partition [__first, __m) < *__m and *__m <= [__m, __last) - // (this inhibits tossing elements equivalent to __m around unnecessarily) - _RandomAccessIterator __i = __first; - _RandomAccessIterator __j = __lm1; - // j points beyond range to be tested, *__lm1 is known to be <= *__m - // The search going up is known to be guarded but the search coming down isn't. - // Prime the downward search with a guard. - if (!__comp(*__i, *__m)) // if *__first == *__m - { - // *__first == *__m, *__first doesn't go in first part - if (_VSTD::__nth_element_find_guard<_Compare>(__i, __j, __m, __comp)) { - swap(*__i, *__j); - ++__n_swaps; - } else { - // *__first == *__m, *__m <= all other elements - // Partition instead into [__first, __i) == *__first and *__first < [__i, __last) - ++__i; // __first + 1 - __j = __last; - if (!__comp(*__first, *--__j)) { // we need a guard if *__first == *(__last-1) - while (true) { - if (__i == __j) { - return; // [__first, __last) all equivalent elements - } else if (__comp(*__first, *__i)) { - swap(*__i, *__j); - ++__n_swaps; - ++__i; - break; - } - ++__i; - } - } - // [__first, __i) == *__first and *__first < [__j, __last) and __j == __last - 1 - if (__i == __j) { - return; - } - while (true) { - while (!__comp(*__first, *__i)) - ++__i; - while (__comp(*__first, *--__j)) - ; - if (__i >= __j) - break; - swap(*__i, *__j); - ++__n_swaps; - ++__i; - } - // [__first, __i) == *__first and *__first < [__i, __last) - // The first part is sorted, - if (__nth < __i) { - return; - } - // __nth_element the second part - // _VSTD::__nth_element<_Compare>(__i, __nth, __last, __comp); - __first = __i; - continue; - } - } - ++__i; - // j points beyond range to be tested, *__lm1 is known to be <= *__m - // if not yet partitioned... - if (__i < __j) - { - // known that *(__i - 1) < *__m - while (true) - { - // __m still guards upward moving __i - while (__comp(*__i, *__m)) - ++__i; - // It is now known that a guard exists for downward moving __j - while (!__comp(*--__j, *__m)) - ; - if (__i >= __j) - break; - swap(*__i, *__j); - ++__n_swaps; - // It is known that __m != __j - // If __m just moved, follow it - if (__m == __i) - __m = __j; - ++__i; - } - } - // [__first, __i) < *__m and *__m <= [__i, __last) - if (__i != __m && __comp(*__m, *__i)) - { - swap(*__i, *__m); - ++__n_swaps; - } - // [__first, __i) < *__i and *__i <= [__i+1, __last) - if (__nth == __i) - return; - if (__n_swaps == 0) - { - // We were given a perfectly partitioned sequence. Coincidence? - if (__nth < __i) - { - // Check for [__first, __i) already sorted - __j = __m = __first; - while (true) { - if (++__j == __i) { - // [__first, __i) sorted - return; - } - if (__comp(*__j, *__m)) { - // not yet sorted, so sort - break; - } - __m = __j; - } - } - else - { - // Check for [__i, __last) already sorted - __j = __m = __i; - while (true) { - if (++__j == __last) { - // [__i, __last) sorted - return; - } - if (__comp(*__j, *__m)) { - // not yet sorted, so sort - break; - } - __m = __j; - } - } - } - // __nth_element on range containing __nth - if (__nth < __i) - { - // _VSTD::__nth_element<_Compare>(__first, __nth, __i, __comp); - __last = __i; - } - else - { - // _VSTD::__nth_element<_Compare>(__i+1, __nth, __last, __comp); - __first = ++__i; - } - } -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - _VSTD::__nth_element<_Comp_ref>(__first, __nth, __last, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last) -{ - _VSTD::nth_element(__first, __nth, __last, __less::value_type>()); -} - -// sort - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - if (__libcpp_is_constant_evaluated()) { - _VSTD::__partial_sort<_Comp_ref>(__first, __last, __last, _Comp_ref(__comp)); - } else { - _VSTD::__sort<_Comp_ref>(_VSTD::__unwrap_iter(__first), _VSTD::__unwrap_iter(__last), _Comp_ref(__comp)); - } -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -void -sort(_RandomAccessIterator __first, _RandomAccessIterator __last) -{ - _VSTD::sort(__first, __last, __less::value_type>()); -} - -// includes - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 bool -__includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, - _Compare __comp) -{ - for (; __first2 != __last2; ++__first1) - { - if (__first1 == __last1 || __comp(*__first2, *__first1)) - return false; - if (!__comp(*__first1, *__first2)) - ++__first2; - } - return true; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, - _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__includes<_Comp_ref>(__first1, __last1, __first2, __last2, __comp); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) -{ - return _VSTD::includes(__first1, __last1, __first2, __last2, - __less::value_type, - typename iterator_traits<_InputIterator2>::value_type>()); -} - -// set_union - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator -__set_union(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) -{ - for (; __first1 != __last1; ++__result) - { - if (__first2 == __last2) - return _VSTD::copy(__first1, __last1, __result); - if (__comp(*__first2, *__first1)) - { - *__result = *__first2; - ++__first2; - } - else - { - if (!__comp(*__first1, *__first2)) - ++__first2; - *__result = *__first1; - ++__first1; - } - } - return _VSTD::copy(__first2, __last2, __result); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -set_union(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__set_union<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -set_union(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) -{ - return _VSTD::set_union(__first1, __last1, __first2, __last2, __result, - __less::value_type, - typename iterator_traits<_InputIterator2>::value_type>()); -} - -// set_intersection - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator -__set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) -{ - while (__first1 != __last1 && __first2 != __last2) - { - if (__comp(*__first1, *__first2)) - ++__first1; - else - { - if (!__comp(*__first2, *__first1)) - { - *__result = *__first1; - ++__result; - ++__first1; - } - ++__first2; - } - } - return __result; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__set_intersection<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) -{ - return _VSTD::set_intersection(__first1, __last1, __first2, __last2, __result, - __less::value_type, - typename iterator_traits<_InputIterator2>::value_type>()); -} - -// set_difference - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator -__set_difference(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) -{ - while (__first1 != __last1) - { - if (__first2 == __last2) - return _VSTD::copy(__first1, __last1, __result); - if (__comp(*__first1, *__first2)) - { - *__result = *__first1; - ++__result; - ++__first1; - } - else - { - if (!__comp(*__first2, *__first1)) - ++__first1; - ++__first2; - } - } - return __result; -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -set_difference(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__set_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -set_difference(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) -{ - return _VSTD::set_difference(__first1, __last1, __first2, __last2, __result, - __less::value_type, - typename iterator_traits<_InputIterator2>::value_type>()); -} - -// set_symmetric_difference - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator -__set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) -{ - while (__first1 != __last1) - { - if (__first2 == __last2) - return _VSTD::copy(__first1, __last1, __result); - if (__comp(*__first1, *__first2)) - { - *__result = *__first1; - ++__result; - ++__first1; - } - else - { - if (__comp(*__first2, *__first1)) - { - *__result = *__first2; - ++__result; - } - else - ++__first1; - ++__first2; - } - } - return _VSTD::copy(__first2, __last2, __result); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__set_symmetric_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -_OutputIterator -set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) -{ - return _VSTD::set_symmetric_difference(__first1, __last1, __first2, __last2, __result, - __less::value_type, - typename iterator_traits<_InputIterator2>::value_type>()); -} - -// lexicographical_compare - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 bool -__lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp) -{ - for (; __first2 != __last2; ++__first1, (void) ++__first2) - { - if (__first1 == __last1 || __comp(*__first1, *__first2)) - return true; - if (__comp(*__first2, *__first1)) - return false; - } - return false; -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__lexicographical_compare<_Comp_ref>(__first1, __last1, __first2, __last2, __comp); -} - -template -_LIBCPP_NODISCARD_EXT inline -_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, - _InputIterator2 __first2, _InputIterator2 __last2) -{ - return _VSTD::lexicographical_compare(__first1, __last1, __first2, __last2, - __less::value_type, - typename iterator_traits<_InputIterator2>::value_type>()); -} - -// next_permutation - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 bool -__next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) -{ - _BidirectionalIterator __i = __last; - if (__first == __last || __first == --__i) - return false; - while (true) - { - _BidirectionalIterator __ip1 = __i; - if (__comp(*--__i, *__ip1)) - { - _BidirectionalIterator __j = __last; - while (!__comp(*__i, *--__j)) - ; - swap(*__i, *__j); - _VSTD::reverse(__ip1, __last); - return true; - } - if (__i == __first) - { - _VSTD::reverse(__first, __last); - return false; - } - } -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__next_permutation<_Comp_ref>(__first, __last, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last) -{ - return _VSTD::next_permutation(__first, __last, - __less::value_type>()); -} - -// prev_permutation - -template -_LIBCPP_CONSTEXPR_AFTER_CXX17 bool -__prev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) -{ - _BidirectionalIterator __i = __last; - if (__first == __last || __first == --__i) - return false; - while (true) - { - _BidirectionalIterator __ip1 = __i; - if (__comp(*__ip1, *--__i)) - { - _BidirectionalIterator __j = __last; - while (!__comp(*--__j, *__i)) - ; - swap(*__i, *__j); - _VSTD::reverse(__ip1, __last); - return true; - } - if (__i == __first) - { - _VSTD::reverse(__first, __last); - return false; - } - } -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -prev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) -{ - typedef typename __comp_ref_type<_Compare>::type _Comp_ref; - return _VSTD::__prev_permutation<_Comp_ref>(__first, __last, __comp); -} - -template -inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 -bool -prev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last) -{ - return _VSTD::prev_permutation(__first, __last, - __less::value_type>()); -} - -_LIBCPP_END_NAMESPACE_STD - _LIBCPP_POP_MACROS #if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17 diff --git a/libcxx/include/experimental/functional b/libcxx/include/experimental/functional --- a/libcxx/include/experimental/functional +++ b/libcxx/include/experimental/functional @@ -86,6 +86,7 @@ */ +#include <__functional/search.h> #include #include #include diff --git a/libcxx/include/functional b/libcxx/include/functional --- a/libcxx/include/functional +++ b/libcxx/include/functional @@ -509,6 +509,7 @@ #include <__config> #include <__debug> #include <__functional_base> +#include <__functional/search.h> #include #include #include @@ -3110,88 +3111,6 @@ // struct hash in -template -pair<_ForwardIterator1, _ForwardIterator1> _LIBCPP_CONSTEXPR_AFTER_CXX11 -__search(_ForwardIterator1 __first1, _ForwardIterator1 __last1, - _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred, - forward_iterator_tag, forward_iterator_tag) -{ - if (__first2 == __last2) - return _VSTD::make_pair(__first1, __first1); // Everything matches an empty sequence - while (true) - { - // Find first element in sequence 1 that matchs *__first2, with a mininum of loop checks - while (true) - { - if (__first1 == __last1) // return __last1 if no element matches *__first2 - return _VSTD::make_pair(__last1, __last1); - if (__pred(*__first1, *__first2)) - break; - ++__first1; - } - // *__first1 matches *__first2, now match elements after here - _ForwardIterator1 __m1 = __first1; - _ForwardIterator2 __m2 = __first2; - while (true) - { - if (++__m2 == __last2) // If pattern exhausted, __first1 is the answer (works for 1 element pattern) - return _VSTD::make_pair(__first1, __m1); - if (++__m1 == __last1) // Otherwise if source exhaused, pattern not found - return _VSTD::make_pair(__last1, __last1); - if (!__pred(*__m1, *__m2)) // if there is a mismatch, restart with a new __first1 - { - ++__first1; - break; - } // else there is a match, check next elements - } - } -} - -template -_LIBCPP_CONSTEXPR_AFTER_CXX11 -pair<_RandomAccessIterator1, _RandomAccessIterator1> -__search(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, - _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _BinaryPredicate __pred, - random_access_iterator_tag, random_access_iterator_tag) -{ - typedef typename iterator_traits<_RandomAccessIterator1>::difference_type _D1; - typedef typename iterator_traits<_RandomAccessIterator2>::difference_type _D2; - // Take advantage of knowing source and pattern lengths. Stop short when source is smaller than pattern - const _D2 __len2 = __last2 - __first2; - if (__len2 == 0) - return _VSTD::make_pair(__first1, __first1); - const _D1 __len1 = __last1 - __first1; - if (__len1 < __len2) - return _VSTD::make_pair(__last1, __last1); - const _RandomAccessIterator1 __s = __last1 - (__len2 - 1); // Start of pattern match can't go beyond here - - while (true) - { - while (true) - { - if (__first1 == __s) - return _VSTD::make_pair(__last1, __last1); - if (__pred(*__first1, *__first2)) - break; - ++__first1; - } - - _RandomAccessIterator1 __m1 = __first1; - _RandomAccessIterator2 __m2 = __first2; - while (true) - { - if (++__m2 == __last2) - return _VSTD::make_pair(__first1, __first1 + __len2); - ++__m1; // no need to check range on __m1 because __s guarantees we have enough source - if (!__pred(*__m1, *__m2)) - { - ++__first1; - break; - } - } - } -} - #if _LIBCPP_STD_VER > 14 // default searcher diff --git a/libcxx/include/module.modulemap b/libcxx/include/module.modulemap --- a/libcxx/include/module.modulemap +++ b/libcxx/include/module.modulemap @@ -217,6 +217,82 @@ header "algorithm" export initializer_list export * + + module __algorithm { + module adjacent_find { header "__algorithm/adjacent_find.h" } + module all_of { header "__algorithm/all_of.h" } + module any_of { header "__algorithm/any_of.h" } + module binary_search { header "__algorithm/binary_search.h" } + module clamp { header "__algorithm/clamp.h" } + module comp { header "__algorithm/comp.h" } + module comp_ref_type { header "__algorithm/comp_ref_type.h" } + module copy { header "__algorithm/copy.h" } + module count { header "__algorithm/count.h" } + module count_if { header "__algorithm/count_if.h" } + module equal { header "__algorithm/equal.h" } + module equal_range { header "__algorithm/equal_range.h" } + module fill { header "__algorithm/fill.h" } + module find { header "__algorithm/find.h" } + module find_end { header "__algorithm/find_end.h" } + module find_first_of { header "__algorithm/find_first_of.h" } + module find_if { header "__algorithm/find_if.h" } + module find_if_not { header "__algorithm/find_if_not.h" } + module for_each { header "__algorithm/for_each.h" } + module for_each_n { header "__algorithm/for_each_n.h" } + module generate { header "__algorithm/generate.h" } + module half_positive { header "__algorithm/half_positive.h" } + module includes { header "__algorithm/includes.h" } + module inplace_merge { header "__algorithm/inplace_merge.h" } + module is_heap { header "__algorithm/is_heap.h" } + module is_heap_until { header "__algorithm/is_heap_until.h" } + module is_partitioned { header "__algorithm/is_partitioned.h" } + module is_permutation { header "__algorithm/is_permutation.h" } + module is_sorted { header "__algorithm/is_sorted.h" } + module lexicographical_compare { header "__algorithm/lexicographical_compare.h" } + module lower_bound { header "__algorithm/lower_bound.h" } + module make_heap { header "__algorithm/make_heap.h" } + module max { header "__algorithm/max.h" } + module max_element { header "__algorithm/max_element.h" } + module merge { header "__algorithm/merge.h" } + module min { header "__algorithm/min.h" } + module min_element { header "__algorithm/min_element.h" } + module minmax { header "__algorithm/minmax.h" } + module minmax_element { header "__algorithm/minmax_element.h" } + module mismatch { header "__algorithm/mismatch.h" } + module move { header "__algorithm/move.h" } + module next_permutation { header "__algorithm/next_permutation.h" } + module none_of { header "__algorithm/none_of.h" } + module nth_element { header "__algorithm/nth_element.h" } + module partial_sort { header "__algorithm/partial_sort.h" } + module partition { header "__algorithm/partition.h" } + module partition_point { header "__algorithm/partition_point.h" } + module pop_heap { header "__algorithm/pop_heap.h" } + module prev_permutation { header "__algorithm/prev_permutation.h" } + module push_heap { header "__algorithm/push_heap.h" } + module remove { header "__algorithm/remove.h" } + module replace { header "__algorithm/replace.h" } + module reverse { header "__algorithm/reverse.h" } + module rotate { header "__algorithm/rotate.h" } + module sample { header "__algorithm/sample.h" } + module search { header "__algorithm/search.h" } + module search_n { header "__algorithm/search_n.h" } + module set_difference { header "__algorithm/set_difference.h" } + module set_intersection { header "__algorithm/set_intersection.h" } + module set_symmetric_difference { header "__algorithm/set_symmetric_difference.h" } + module set_union { header "__algorithm/set_union.h" } + module shift { header "__algorithm/shift.h" } + module shuffle { header "__algorithm/shuffle.h" } + module sift_down { header "__algorithm/sift_down.h" } + module sort { header "__algorithm/sort.h" } + module sort_heap { header "__algorithm/sort_heap.h" } + module stable_partition { header "__algorithm/stable_partition.h" } + module stable_sort { header "__algorithm/stable_sort.h" } + module transform { header "__algorithm/transform.h" } + module uniform_int_distribution { header "__algorithm/uniform_int_distribution.h" } + module unique { header "__algorithm/unique.h" } + module unwrap_iter { header "__algorithm/unwrap_iter.h" } + module upper_bound { header "__algorithm/upper_bound.h" } + } } module any { header "any" @@ -313,6 +389,9 @@ module functional { header "functional" export * + module __functional { + module search { header "__functional/search.h" } + } } module future { header "future" diff --git a/libcxx/include/regex b/libcxx/include/regex --- a/libcxx/include/regex +++ b/libcxx/include/regex @@ -764,6 +764,7 @@ #include <__config> #include <__debug> +#include <__functional/search.h> #include <__locale> #include #include diff --git a/libcxx/test/std/algorithms/alg.modifying.operations/alg.random.sample/sample.fail.cpp b/libcxx/test/std/algorithms/alg.modifying.operations/alg.random.sample/sample.fail.cpp --- a/libcxx/test/std/algorithms/alg.modifying.operations/alg.random.sample/sample.fail.cpp +++ b/libcxx/test/std/algorithms/alg.modifying.operations/alg.random.sample/sample.fail.cpp @@ -36,9 +36,9 @@ } int main(int, char**) { - // expected-error-re@algorithm:* {{static_assert failed{{( due to requirement '.*')?}} "SampleIterator must meet the requirements of RandomAccessIterator"}} - // expected-error@algorithm:* 2 {{does not provide a subscript operator}} - // expected-error@algorithm:* {{invalid operands}} + // expected-error-re@*:* {{static_assert failed{{( due to requirement '.*')?}} "SampleIterator must meet the requirements of RandomAccessIterator"}} + // expected-error@*:* 2 {{does not provide a subscript operator}} + // expected-error@*:* {{invalid operands}} test, output_iterator >(); return 0; diff --git a/libcxx/test/std/algorithms/alg.sorting/alg.min.max/requires_forward_iterator.fail.cpp b/libcxx/test/std/algorithms/alg.sorting/alg.min.max/requires_forward_iterator.fail.cpp --- a/libcxx/test/std/algorithms/alg.sorting/alg.min.max/requires_forward_iterator.fail.cpp +++ b/libcxx/test/std/algorithms/alg.sorting/alg.min.max/requires_forward_iterator.fail.cpp @@ -24,15 +24,15 @@ const int *b = std::begin(arr), *e = std::end(arr); typedef cpp17_input_iterator Iter; { - // expected-error@algorithm:* {{"std::min_element requires a ForwardIterator"}} + // expected-error@*:* {{"std::min_element requires a ForwardIterator"}} std::min_element(Iter(b), Iter(e)); } { - // expected-error@algorithm:* {{"std::max_element requires a ForwardIterator"}} + // expected-error@*:* {{"std::max_element requires a ForwardIterator"}} std::max_element(Iter(b), Iter(e)); } { - // expected-error@algorithm:* {{"std::minmax_element requires a ForwardIterator"}} + // expected-error@*:* {{"std::minmax_element requires a ForwardIterator"}} std::minmax_element(Iter(b), Iter(e)); } diff --git a/libcxx/test/std/containers/sequences/array/compare.fail.cpp b/libcxx/test/std/containers/sequences/array/compare.fail.cpp --- a/libcxx/test/std/containers/sequences/array/compare.fail.cpp +++ b/libcxx/test/std/containers/sequences/array/compare.fail.cpp @@ -50,7 +50,7 @@ typedef NoCompare<0> T; typedef std::array C; C c1 = {{}}; - // expected-error@algorithm:* 2 {{invalid operands to binary expression}} + // expected-error@*:* 2 {{invalid operands to binary expression}} TEST_IGNORE_NODISCARD (c1 == c1); TEST_IGNORE_NODISCARD (c1 < c1); } @@ -58,7 +58,7 @@ typedef NoCompare<1> T; typedef std::array C; C c1 = {{}}; - // expected-error@algorithm:* 2 {{invalid operands to binary expression}} + // expected-error@*:* 2 {{invalid operands to binary expression}} TEST_IGNORE_NODISCARD (c1 != c1); TEST_IGNORE_NODISCARD (c1 > c1); } @@ -66,7 +66,7 @@ typedef NoCompare<2> T; typedef std::array C; C c1 = {{}}; - // expected-error@algorithm:* 2 {{invalid operands to binary expression}} + // expected-error@*:* 2 {{invalid operands to binary expression}} TEST_IGNORE_NODISCARD (c1 == c1); TEST_IGNORE_NODISCARD (c1 < c1); }