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#ifndef PYTHONIC_NUMPY_FLATNONZERO_HPP
#define PYTHONIC_NUMPY_FLATNONZERO_HPP
#include "pythonic/include/numpy/flatnonzero.hpp"
#include "pythonic/numpy/asarray.hpp"
PYTHONIC_NS_BEGIN
namespace numpy
{
namespace
{
template <class I, class O>
void _flatnonzero(I begin, I end, O &out, long &i, utils::int_<1>)
{
for (; begin != end; ++begin, ++i)
if (*begin)
*out++ = i;
}
template <class I, class O, size_t N>
void _flatnonzero(I begin, I end, O &out, long &i, utils::int_<N>)
{
for (; begin != end; ++begin)
_flatnonzero((*begin).begin(), (*begin).end(), out, i,
utils::int_<N - 1>());
}
}
template <class E>
types::ndarray<long, types::pshape<long>> flatnonzero(E const &expr)
{
long n = expr.flat_size();
utils::shared_ref<types::raw_array<long>> buffer(n);
long *iter = buffer->data;
long i = 0;
_flatnonzero(expr.begin(), expr.end(), iter, i, utils::int_<E::value>());
types::pshape<long> shape = iter - buffer->data;
return types::ndarray<long, types::pshape<long>>(std::move(buffer), shape);
}
}
PYTHONIC_NS_END
#endif
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