1fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 2fe6060f1SDimitry Andric // 3fe6060f1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4fe6060f1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5fe6060f1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6fe6060f1SDimitry Andric // 7fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 8fe6060f1SDimitry Andric 9fe6060f1SDimitry Andric #ifndef _LIBCPP___ALGORITHM_PUSH_HEAP_H 10fe6060f1SDimitry Andric #define _LIBCPP___ALGORITHM_PUSH_HEAP_H 11fe6060f1SDimitry Andric 12fe6060f1SDimitry Andric #include <__algorithm/comp.h> 13fe6060f1SDimitry Andric #include <__algorithm/comp_ref_type.h> 14fcaf7f86SDimitry Andric #include <__algorithm/iterator_operations.h> 1504eeddc0SDimitry Andric #include <__config> 16fe6060f1SDimitry Andric #include <__iterator/iterator_traits.h> 17*0fca6ea1SDimitry Andric #include <__type_traits/is_assignable.h> 18*0fca6ea1SDimitry Andric #include <__type_traits/is_constructible.h> 19fe6060f1SDimitry Andric #include <__utility/move.h> 20fe6060f1SDimitry Andric 21fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 22fe6060f1SDimitry Andric # pragma GCC system_header 23fe6060f1SDimitry Andric #endif 24fe6060f1SDimitry Andric 2506c3fb27SDimitry Andric _LIBCPP_PUSH_MACROS 2606c3fb27SDimitry Andric #include <__undef_macros> 2706c3fb27SDimitry Andric 28fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 29fe6060f1SDimitry Andric 30fcaf7f86SDimitry Andric template <class _AlgPolicy, class _Compare, class _RandomAccessIterator> 31cb14a3feSDimitry Andric _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void 32cb14a3feSDimitry Andric __sift_up(_RandomAccessIterator __first, 33cb14a3feSDimitry Andric _RandomAccessIterator __last, 34cb14a3feSDimitry Andric _Compare&& __comp, 35753f127fSDimitry Andric typename iterator_traits<_RandomAccessIterator>::difference_type __len) { 36753f127fSDimitry Andric using value_type = typename iterator_traits<_RandomAccessIterator>::value_type; 37753f127fSDimitry Andric 38753f127fSDimitry Andric if (__len > 1) { 39fe6060f1SDimitry Andric __len = (__len - 2) / 2; 40fe6060f1SDimitry Andric _RandomAccessIterator __ptr = __first + __len; 41753f127fSDimitry Andric 42753f127fSDimitry Andric if (__comp(*__ptr, *--__last)) { 43fcaf7f86SDimitry Andric value_type __t(_IterOps<_AlgPolicy>::__iter_move(__last)); 44753f127fSDimitry Andric do { 45fcaf7f86SDimitry Andric *__last = _IterOps<_AlgPolicy>::__iter_move(__ptr); 46fe6060f1SDimitry Andric __last = __ptr; 47fe6060f1SDimitry Andric if (__len == 0) 48fe6060f1SDimitry Andric break; 49fe6060f1SDimitry Andric __len = (__len - 1) / 2; 50fe6060f1SDimitry Andric __ptr = __first + __len; 51fe6060f1SDimitry Andric } while (__comp(*__ptr, __t)); 52753f127fSDimitry Andric 53753f127fSDimitry Andric *__last = std::move(__t); 54fe6060f1SDimitry Andric } 55fe6060f1SDimitry Andric } 56fe6060f1SDimitry Andric } 57fe6060f1SDimitry Andric 58fcaf7f86SDimitry Andric template <class _AlgPolicy, class _RandomAccessIterator, class _Compare> 59cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void 60cb14a3feSDimitry Andric __push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare& __comp) { 61753f127fSDimitry Andric typename iterator_traits<_RandomAccessIterator>::difference_type __len = __last - __first; 62bdd1243dSDimitry Andric std::__sift_up<_AlgPolicy, __comp_ref_type<_Compare> >(std::move(__first), std::move(__last), __comp, __len); 63753f127fSDimitry Andric } 64753f127fSDimitry Andric 65753f127fSDimitry Andric template <class _RandomAccessIterator, class _Compare> 66cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 67cb14a3feSDimitry Andric push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) { 68fcaf7f86SDimitry Andric static_assert(std::is_copy_constructible<_RandomAccessIterator>::value, "Iterators must be copy constructible."); 69fcaf7f86SDimitry Andric static_assert(std::is_copy_assignable<_RandomAccessIterator>::value, "Iterators must be copy assignable."); 70fcaf7f86SDimitry Andric 71fcaf7f86SDimitry Andric std::__push_heap<_ClassicAlgPolicy>(std::move(__first), std::move(__last), __comp); 72fe6060f1SDimitry Andric } 73fe6060f1SDimitry Andric 74fe6060f1SDimitry Andric template <class _RandomAccessIterator> 75cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 76cb14a3feSDimitry Andric push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) { 7706c3fb27SDimitry Andric std::push_heap(std::move(__first), std::move(__last), __less<>()); 78fe6060f1SDimitry Andric } 79fe6060f1SDimitry Andric 80fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 81fe6060f1SDimitry Andric 8206c3fb27SDimitry Andric _LIBCPP_POP_MACROS 8306c3fb27SDimitry Andric 84fe6060f1SDimitry Andric #endif // _LIBCPP___ALGORITHM_PUSH_HEAP_H 85