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bolero-MURAKAMI 2011-09-01 02:48:32 +00:00
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sprout/algorithm/fixed/rotate_copy.hpp Normal file
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#ifndef SPROUT_ALGORITHM_FIXED_ROTATE_COPY_HPP
#define SPROUT_ALGORITHM_FIXED_ROTATE_COPY_HPP
#include <cstddef>
#include <sprout/config.hpp>
#include <sprout/index_tuple.hpp>
#include <sprout/fixed_container/traits.hpp>
#include <sprout/fixed_container/functions.hpp>
#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT_DETAIL
namespace sprout {
namespace fixed {
namespace detail {
template<typename Iterator, typename Result, std::ptrdiff_t... Indexes>
SPROUT_CONSTEXPR inline typename sprout::fixed_container_traits<Result>::fixed_container_type rotate_copy_impl(
Iterator first,
Iterator middle,
Iterator last,
Result const& result,
sprout::index_tuple<Indexes...>,
typename sprout::fixed_container_traits<Result>::difference_type offset,
typename sprout::fixed_container_traits<Result>::size_type size,
typename sprout::fixed_container_traits<Result>::size_type input_size
)
{
return typename sprout::fixed_container_traits<Result>::fixed_container_type{
(Indexes >= offset && Indexes < offset + size && Indexes < offset + input_size
? (Indexes < offset + NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(middle, last)
? *(middle + Indexes - offset)
: *((first + Indexes - offset) - NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(first, middle))
)
: *(sprout::fixed_begin(result) + Indexes)
)...
};
}
} // namespace detail
//
// rotate_copy
//
template<typename Iterator, typename Result>
SPROUT_CONSTEXPR inline typename sprout::fixed_container_traits<Result>::fixed_container_type rotate_copy(
Iterator first,
Iterator middle,
Iterator last,
Result const& result
)
{
return sprout::fixed::detail::rotate_copy_impl(
first,
middle,
last,
result,
typename sprout::index_range<0, sprout::fixed_container_traits<Result>::fixed_size>::type(),
sprout::fixed_begin_offset(result),
sprout::size(result),
NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(first, last)
);
}
} // namespace fixed
} // namespace sprout
#endif // #ifndef SPROUT_ALGORITHM_FIXED_ROTATE_COPY_HPP