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| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___CXX03___ALGORITHM_UPPER_BOUND_H |
| 10 | #define _LIBCPP___CXX03___ALGORITHM_UPPER_BOUND_H |
| 11 | |
| 12 | #include <__cxx03/__algorithm/comp.h> |
| 13 | #include <__cxx03/__algorithm/half_positive.h> |
| 14 | #include <__cxx03/__algorithm/iterator_operations.h> |
| 15 | #include <__cxx03/__config> |
| 16 | #include <__cxx03/__functional/identity.h> |
| 17 | #include <__cxx03/__iterator/advance.h> |
| 18 | #include <__cxx03/__iterator/distance.h> |
| 19 | #include <__cxx03/__iterator/iterator_traits.h> |
| 20 | #include <__cxx03/__type_traits/invoke.h> |
| 21 | #include <__cxx03/__type_traits/is_constructible.h> |
| 22 | #include <__cxx03/__utility/move.h> |
| 23 | |
| 24 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 25 | # pragma GCC system_header |
| 26 | #endif |
| 27 | |
| 28 | _LIBCPP_PUSH_MACROS |
| 29 | #include <__cxx03/__undef_macros> |
| 30 | |
| 31 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 32 | |
| 33 | template <class _AlgPolicy, class _Compare, class _Iter, class _Sent, class _Tp, class _Proj> |
| 34 | _LIBCPP_HIDE_FROM_ABI _Iter |
| 35 | __upper_bound(_Iter __first, _Sent __last, const _Tp& __value, _Compare&& __comp, _Proj&& __proj) { |
| 36 | auto __len = _IterOps<_AlgPolicy>::distance(__first, __last); |
| 37 | while (__len != 0) { |
| 38 | auto __half_len = std::__half_positive(__len); |
| 39 | auto __mid = _IterOps<_AlgPolicy>::next(__first, __half_len); |
| 40 | if (std::__invoke(__comp, __value, std::__invoke(__proj, *__mid))) |
| 41 | __len = __half_len; |
| 42 | else { |
| 43 | __first = ++__mid; |
| 44 | __len -= __half_len + 1; |
| 45 | } |
| 46 | } |
| 47 | return __first; |
| 48 | } |
| 49 | |
| 50 | template <class _ForwardIterator, class _Tp, class _Compare> |
| 51 | _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _ForwardIterator |
| 52 | upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, _Compare __comp) { |
| 53 | static_assert(is_copy_constructible<_ForwardIterator>::value, "Iterator has to be copy constructible"); |
| 54 | return std::__upper_bound<_ClassicAlgPolicy>( |
| 55 | std::move(__first), std::move(__last), __value, std::move(__comp), std::__identity()); |
| 56 | } |
| 57 | |
| 58 | template <class _ForwardIterator, class _Tp> |
| 59 | _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _ForwardIterator |
| 60 | upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) { |
| 61 | return std::upper_bound(std::move(__first), std::move(__last), __value, __less<>()); |
| 62 | } |
| 63 | |
| 64 | _LIBCPP_END_NAMESPACE_STD |
| 65 | |
| 66 | _LIBCPP_POP_MACROS |
| 67 | |
| 68 | #endif // _LIBCPP___CXX03___ALGORITHM_UPPER_BOUND_H |
| 69 |
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