mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-12-27 21:45:42 +00:00
81 lines
3.2 KiB
C++
81 lines
3.2 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2016 Bolero MURAKAMI
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
=============================================================================*/
|
|
#ifndef SPROUT_ALGORITHM_FIXED_NTH_ELEMENT_HPP
|
|
#define SPROUT_ALGORITHM_FIXED_NTH_ELEMENT_HPP
|
|
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/container/traits.hpp>
|
|
#include <sprout/container/functions.hpp>
|
|
#include <sprout/iterator/operation.hpp>
|
|
#include <sprout/algorithm/fixed/results.hpp>
|
|
#include <sprout/algorithm/fixed/swap_element.hpp>
|
|
#include <sprout/algorithm/fixed/make_partial_heap.hpp>
|
|
#include HDR_FUNCTIONAL_SSCRISK_CEL_OR_SPROUT
|
|
|
|
namespace sprout {
|
|
namespace fixed {
|
|
namespace detail {
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::results::algorithm<Container>::type
|
|
nth_element_impl_1(
|
|
Container const& cont,
|
|
typename sprout::container_traits<Container>::difference_type offset,
|
|
typename sprout::container_traits<Container>::difference_type nth_size
|
|
)
|
|
{
|
|
return sprout::fixed::swap_element(
|
|
cont,
|
|
sprout::next(sprout::internal_begin(cont), offset),
|
|
sprout::next(sprout::internal_begin(cont), offset + nth_size)
|
|
);
|
|
}
|
|
template<typename Container, typename Compare>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::results::algorithm<Container>::type
|
|
nth_element_impl(
|
|
Container const& cont, Compare comp,
|
|
typename sprout::container_traits<Container>::difference_type offset,
|
|
typename sprout::container_traits<Container>::difference_type size,
|
|
typename sprout::container_traits<Container>::difference_type nth_size
|
|
)
|
|
{
|
|
return sprout::fixed::detail::nth_element_impl_1(
|
|
sprout::fixed::detail::make_partial_heap_impl(cont, comp, offset, size, nth_size + 1),
|
|
offset,
|
|
nth_size
|
|
);
|
|
}
|
|
} // namespace detail
|
|
//
|
|
// nth_element
|
|
//
|
|
template<typename Container, typename Compare>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::results::algorithm<Container>::type
|
|
nth_element(Container const& cont, typename sprout::container_traits<Container>::const_iterator nth, Compare comp) {
|
|
return sprout::fixed::detail::nth_element_impl(
|
|
cont, comp,
|
|
sprout::internal_begin_offset(cont),
|
|
sprout::size(cont),
|
|
sprout::distance(sprout::begin(cont), nth)
|
|
);
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::results::algorithm<Container>::type
|
|
nth_element(Container const& cont, typename sprout::container_traits<Container>::const_iterator nth) {
|
|
return sprout::fixed::detail::nth_element_impl(
|
|
cont, NS_SSCRISK_CEL_OR_SPROUT::less<typename sprout::container_traits<Container>::value_type>(),
|
|
sprout::internal_begin_offset(cont),
|
|
sprout::size(cont),
|
|
sprout::distance(sprout::begin(cont), nth)
|
|
);
|
|
}
|
|
} // namespace fixed
|
|
|
|
using sprout::fixed::nth_element;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_ALGORITHM_FIXED_NTH_ELEMENT_HPP
|