mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
85 lines
3.1 KiB
C++
85 lines
3.1 KiB
C++
#ifndef SPROUT_ALGORITHM_EQUAL_HPP
|
|
#define SPROUT_ALGORITHM_EQUAL_HPP
|
|
|
|
#include <iterator>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/iterator/operation.hpp>
|
|
#include <sprout/iterator/type_traits/common.hpp>
|
|
#include <sprout/functional/equal_to.hpp>
|
|
#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT
|
|
|
|
namespace sprout {
|
|
namespace detail {
|
|
template<typename RandomAccessIterator1, typename RandomAccessIterator2, typename BinaryPredicate>
|
|
inline SPROUT_CONSTEXPR bool
|
|
equal_impl_ra(
|
|
RandomAccessIterator1 first1, RandomAccessIterator1 last1, RandomAccessIterator2 first2, BinaryPredicate pred,
|
|
typename std::iterator_traits<RandomAccessIterator1>::difference_type pivot
|
|
)
|
|
{
|
|
return pivot == 0 ? pred(*first1, *first2)
|
|
: sprout::detail::equal_impl_ra(
|
|
first1, sprout::next(first1, pivot), first2, pred,
|
|
pivot / 2
|
|
)
|
|
&& sprout::detail::equal_impl_ra(
|
|
sprout::next(first1, pivot), last1, sprout::next(first2, pivot), pred,
|
|
(NS_SSCRISK_CEL_OR_SPROUT::distance(first1, last1) - pivot) / 2
|
|
)
|
|
;
|
|
}
|
|
template<typename RandomAccessIterator1, typename RandomAccessIterator2, typename BinaryPredicate>
|
|
inline SPROUT_CONSTEXPR bool
|
|
equal(
|
|
RandomAccessIterator1 first1, RandomAccessIterator1 last1, RandomAccessIterator2 first2, BinaryPredicate pred,
|
|
std::random_access_iterator_tag*
|
|
)
|
|
{
|
|
return first1 == last1 ? true
|
|
: sprout::detail::equal_impl_ra(
|
|
first1, last1, first2, pred,
|
|
NS_SSCRISK_CEL_OR_SPROUT::distance(first1, last1) / 2
|
|
)
|
|
;
|
|
}
|
|
|
|
// Copyright (C) 2011 RiSK (sscrisk)
|
|
template<typename InputIterator1, typename InputIterator2, typename BinaryPredicate>
|
|
inline SPROUT_CONSTEXPR bool
|
|
equal_impl(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, BinaryPredicate pred) {
|
|
return first1 == last1 ? true
|
|
: pred(*first1, *first2) && sprout::detail::equal_impl(sprout::next(first1), last1, sprout::next(first2), pred)
|
|
;
|
|
}
|
|
template<typename InputIterator1, typename InputIterator2, typename BinaryPredicate>
|
|
inline SPROUT_CONSTEXPR bool
|
|
equal(
|
|
InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, BinaryPredicate pred,
|
|
void*
|
|
)
|
|
{
|
|
return sprout::detail::equal_impl(first1, last1, first2, pred);
|
|
}
|
|
} //namespace detail
|
|
|
|
// 25.2.11 Equal
|
|
//
|
|
// recursion depth:
|
|
// [first1, last1), first2 are RandomAccessIterator -> O(log N)
|
|
// otherwise -> O(N)
|
|
//
|
|
template<typename InputIterator1, typename InputIterator2, typename BinaryPredicate>
|
|
inline SPROUT_CONSTEXPR bool
|
|
equal(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, BinaryPredicate pred) {
|
|
typedef typename sprout::common_iterator_category<InputIterator1, InputIterator2>::type* category;
|
|
return sprout::detail::equal(first1, last1, first2, pred, category());
|
|
}
|
|
|
|
template<typename InputIterator1, typename InputIterator2>
|
|
inline SPROUT_CONSTEXPR bool
|
|
equal(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2) {
|
|
return sprout::equal(first1, last1, first2, sprout::equal_to<>());
|
|
}
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_ALGORITHM_EQUAL_HPP
|