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https://github.com/capstone-engine/llvm-capstone.git
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368faacac7
This commit reverts 5aaefa51 (and also partly 7f285f48e77 and b6d75682f9, which were related to the original commit). As landed, 5aaefa51 had unintended consequences on some downstream bots and didn't have proper coverage upstream due to a few subtle things. Implementing this is something we should do in libc++, however we'll first need to address a few issues listed in https://reviews.llvm.org/D106124#3349710. Differential Revision: https://reviews.llvm.org/D120683
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_EQUAL_RANGE_H
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#define _LIBCPP___ALGORITHM_EQUAL_RANGE_H
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#include <__algorithm/comp.h>
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#include <__algorithm/comp_ref_type.h>
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#include <__algorithm/half_positive.h>
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#include <__algorithm/lower_bound.h>
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#include <__algorithm/upper_bound.h>
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#include <__config>
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#include <iterator>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _Compare, class _ForwardIterator, class _Tp>
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_LIBCPP_CONSTEXPR_AFTER_CXX17 pair<_ForwardIterator, _ForwardIterator>
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__equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp)
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{
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typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type;
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difference_type __len = _VSTD::distance(__first, __last);
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while (__len != 0)
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{
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difference_type __l2 = _VSTD::__half_positive(__len);
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_ForwardIterator __m = __first;
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_VSTD::advance(__m, __l2);
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if (__comp(*__m, __value_))
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{
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__first = ++__m;
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__len -= __l2 + 1;
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}
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else if (__comp(__value_, *__m))
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{
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__last = __m;
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__len = __l2;
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}
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else
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{
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_ForwardIterator __mp1 = __m;
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return pair<_ForwardIterator, _ForwardIterator>
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(
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_VSTD::__lower_bound<_Compare>(__first, __m, __value_, __comp),
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_VSTD::__upper_bound<_Compare>(++__mp1, __last, __value_, __comp)
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);
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}
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}
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return pair<_ForwardIterator, _ForwardIterator>(__first, __first);
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}
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template <class _ForwardIterator, class _Tp, class _Compare>
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_LIBCPP_NODISCARD_EXT inline
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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pair<_ForwardIterator, _ForwardIterator>
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equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp)
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{
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typedef typename __comp_ref_type<_Compare>::type _Comp_ref;
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return _VSTD::__equal_range<_Comp_ref>(__first, __last, __value_, __comp);
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}
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template <class _ForwardIterator, class _Tp>
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_LIBCPP_NODISCARD_EXT inline
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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pair<_ForwardIterator, _ForwardIterator>
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equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_)
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{
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return _VSTD::equal_range(__first, __last, __value_,
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__less<typename iterator_traits<_ForwardIterator>::value_type, _Tp>());
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ALGORITHM_EQUAL_RANGE_H
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