Sprout/sprout/numeric/dft/fixed/dft.hpp
2012-04-11 23:28:29 +09:00

71 lines
2.3 KiB
C++

#ifndef SPROUT_NUMERIC_DFT_FIXED_DFT_HPP
#define SPROUT_NUMERIC_DFT_FIXED_DFT_HPP
#include <sprout/config.hpp>
#include <sprout/index_tuple.hpp>
#include <sprout/container/traits.hpp>
#include <sprout/container/functions.hpp>
#include <sprout/iterator/operation.hpp>
#include <sprout/algorithm/fixed/result_of.hpp>
#include <sprout/numeric/dft/dft_element.hpp>
#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT
namespace sprout {
namespace fixed {
namespace detail {
template<typename InputIterator, typename Result, sprout::index_t... Indexes>
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Result>::type dft_impl(
InputIterator first,
InputIterator last,
Result const& result,
sprout::index_tuple<Indexes...>,
typename sprout::container_traits<Result>::difference_type offset,
typename sprout::container_traits<Result>::size_type size,
typename sprout::container_traits<Result>::size_type input_size
)
{
return sprout::remake<Result>(
result,
size,
(Indexes >= offset && Indexes < offset + size && Indexes < offset + input_size
? sprout::detail::dft_element_impl(first, last, Indexes - offset, input_size)
: *sprout::next(sprout::internal_begin(result), Indexes)
)...
);
}
template<typename InputIterator, typename Result>
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Result>::type dft(
InputIterator first,
InputIterator last,
Result const& result
)
{
return sprout::fixed::detail::dft_impl(
first,
last,
result,
typename sprout::index_range<0, sprout::container_traits<Result>::static_size>::type(),
sprout::internal_begin_offset(result),
sprout::size(result),
NS_SSCRISK_CEL_OR_SPROUT::distance(first, last)
);
}
} // namespace detail
//
// dft
//
template<typename InputIterator, typename Result>
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Result>::type dft(
InputIterator first,
InputIterator last,
Result const& result
)
{
return sprout::fixed::detail::dft(first, last, result);
}
} // namespace fixed
using sprout::fixed::dft;
} // namespace sprout
#endif // #ifndef SPROUT_NUMERIC_DFT_FIXED_DFT_HPP