mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
115 lines
4 KiB
C++
115 lines
4 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2017 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_LEXICOGRAPHICAL_COMPARE_HPP
|
|
#define SPROUT_ALGORITHM_LEXICOGRAPHICAL_COMPARE_HPP
|
|
|
|
#include <iterator>
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/detail/algorithm/lexicographical_compare.hpp>
|
|
#include <sprout/iterator/distance.hpp>
|
|
#include <sprout/iterator/type_traits/category.hpp>
|
|
#include <sprout/iterator/type_traits/common.hpp>
|
|
#include <sprout/utility/pair/pair.hpp>
|
|
#include <sprout/functional/less.hpp>
|
|
#include HDR_ALGORITHM_MIN_MAX_SSCRISK_CEL_OR_SPROUT
|
|
|
|
namespace sprout {
|
|
namespace detail {
|
|
template<typename Difference1, typename Difference2>
|
|
inline SPROUT_CONSTEXPR bool
|
|
lexicographical_compare_impl_check(
|
|
Difference1 size1, Difference2 size2,
|
|
int found
|
|
)
|
|
{
|
|
return found < 0 || (found == 2 && size1 < size2);
|
|
}
|
|
|
|
template<typename RandomAccessIterator1, typename RandomAccessIterator2, typename Compare>
|
|
inline SPROUT_CONSTEXPR typename std::enable_if<
|
|
sprout::is_constant_distance_iterator<RandomAccessIterator1>::value,
|
|
bool
|
|
>::type
|
|
lexicographical_compare(
|
|
RandomAccessIterator1 first1, RandomAccessIterator1 last1, RandomAccessIterator2 first2, RandomAccessIterator2 last2, Compare comp,
|
|
std::random_access_iterator_tag*
|
|
)
|
|
{
|
|
return first2 == last2 ? false
|
|
: first1 == last1 ? true
|
|
: sprout::detail::lexicographical_compare_impl_check(
|
|
sprout::distance(first1, last1), sprout::distance(first2, last2),
|
|
sprout::detail::lexicographical_compare_impl_ra(
|
|
first1, first2, comp,
|
|
NS_SSCRISK_CEL_OR_SPROUT::min(sprout::distance(first1, last1), sprout::distance(first2, last2)),
|
|
2
|
|
)
|
|
)
|
|
;
|
|
}
|
|
|
|
template<typename InputIterator1, typename InputIterator2, typename Compare>
|
|
inline SPROUT_CONSTEXPR bool
|
|
lexicographical_compare_impl_check(
|
|
InputIterator1 last1, InputIterator2 last2, Compare comp,
|
|
sprout::pair<InputIterator1, InputIterator2> const& found
|
|
)
|
|
{
|
|
return found.second == last2 ? false
|
|
: found.first == last1 || comp(*found.first, *found.second)
|
|
;
|
|
}
|
|
|
|
template<typename InputIterator1, typename InputIterator2, typename Compare>
|
|
inline SPROUT_CONSTEXPR bool
|
|
lexicographical_compare(
|
|
InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2, Compare comp,
|
|
std::input_iterator_tag*
|
|
)
|
|
{
|
|
typedef sprout::pair<InputIterator1, InputIterator2> type;
|
|
return sprout::detail::lexicographical_compare_impl_check(
|
|
last1, last2, comp,
|
|
sprout::detail::lexicographical_compare_impl(type(first1, first2), last1, last2, comp, 1)
|
|
);
|
|
}
|
|
} // namespace detail
|
|
|
|
// 25.4.8 Lexicographical comparison
|
|
//
|
|
// recursion depth:
|
|
// O(log(N1+N2))
|
|
//
|
|
template<typename InputIterator1, typename InputIterator2, typename Compare>
|
|
inline SPROUT_CONSTEXPR bool
|
|
lexicographical_compare(
|
|
InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, InputIterator2 last2,
|
|
Compare comp
|
|
)
|
|
{
|
|
typedef typename sprout::common_iterator_category<InputIterator1, InputIterator2>::type* category;
|
|
return sprout::detail::lexicographical_compare(first1, last1, first2, last2, comp, category());
|
|
}
|
|
|
|
template<typename InputIterator1, typename InputIterator2>
|
|
inline SPROUT_CONSTEXPR bool
|
|
lexicographical_compare(
|
|
InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, InputIterator2 last2
|
|
)
|
|
{
|
|
return sprout::lexicographical_compare(
|
|
first1, last1, first2, last2,
|
|
sprout::less<>()
|
|
);
|
|
}
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_ALGORITHM_LEXICOGRAPHICAL_COMPARE_HPP
|