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#ifndef PYTHONIC_NUMPY_NDINDEX_HPP
#define PYTHONIC_NUMPY_NDINDEX_HPP
#include "pythonic/include/numpy/ndindex.hpp"
#include "pythonic/utils/functor.hpp"
#include <numeric>
PYTHONIC_NS_BEGIN
namespace numpy
{
template <size_t N>
ndindex_iterator<N>::ndindex_iterator()
{
}
template <size_t N>
ndindex_iterator<N>::ndindex_iterator(types::array<long, N> const &shape,
long first)
: index(first), shape(shape)
{
}
template <size_t N>
types::array<long, N> ndindex_iterator<N>::operator*() const
{
types::array<long, N> out;
long mult = 1;
for (long j = N - 1; j > 0; j--) {
out[j] = (index / mult) % shape[j];
mult *= shape[j];
}
out[0] = index / mult;
return out;
}
template <size_t N>
ndindex_iterator<N> &ndindex_iterator<N>::operator++()
{
++index;
return *this;
}
template <size_t N>
ndindex_iterator<N> &ndindex_iterator<N>::operator+=(long n)
{
index += n;
return *this;
}
template <size_t N>
bool ndindex_iterator<N>::operator!=(ndindex_iterator<N> const &other) const
{
return index != other.index;
}
template <size_t N>
bool ndindex_iterator<N>::operator<(ndindex_iterator<N> const &other) const
{
return index < other.index;
}
template <size_t N>
long ndindex_iterator<N>::operator-(ndindex_iterator<N> const &other) const
{
return index - other.index;
}
template <size_t N>
_ndindex<N>::_ndindex()
{
}
template <size_t N>
_ndindex<N>::_ndindex(types::array<long, N> const &shape)
: ndindex_iterator<N>(shape, 0), shape(shape),
end_iter(shape, std::accumulate(shape.begin(), shape.end(), 1L,
std::multiplies<long>()))
{
}
template <size_t N>
typename _ndindex<N>::iterator &_ndindex<N>::begin()
{
return *this;
}
template <size_t N>
typename _ndindex<N>::iterator const &_ndindex<N>::begin() const
{
return *this;
}
template <size_t N>
typename _ndindex<N>::iterator _ndindex<N>::end() const
{
return end_iter;
}
template <class... Types>
_ndindex<sizeof...(Types)> ndindex(Types... args)
{
return {types::make_tuple(args...)};
}
template <size_t N>
_ndindex<N> ndindex(types::array<long, N> const &args)
{
return {args};
}
template <class... Tys>
_ndindex<sizeof...(Tys)> ndindex(types::pshape<Tys...> const &args)
{
return {args};
}
}
PYTHONIC_NS_END
#endif
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