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//===----------------------------------------------------------------------===//
//
// 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 <__algorithm/comp.h>
#include <__algorithm/half_positive.h>
#include <__config>
#include <__iterator/advance.h>
#include <__iterator/distance.h>
#include <__iterator/iterator_traits.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _Compare, class _ForwardIterator, class _Tp>
_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 <class _ForwardIterator, class _Tp, class _Compare>
_LIBCPP_NODISCARD_EXT inline
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
_ForwardIterator
upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, _Compare __comp)
{
return _VSTD::__upper_bound<_Compare&>(__first, __last, __value, __comp);
}
template <class _ForwardIterator, class _Tp>
_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
#endif // _LIBCPP___ALGORITHM_UPPER_BOUND_H
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