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zarray_wrapper.hpp
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226 lines (184 loc) · 6.44 KB
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/***************************************************************************
* Copyright (c) Johan Mabille, Sylvain Corlay and Wolf Vollprecht *
* Copyright (c) QuantStack *
* *
* Distributed under the terms of the BSD 3-Clause License. *
* *
* The full license is in the file LICENSE, distributed with this software. *
****************************************************************************/
#ifndef XTENSOR_ZARRAY_WRAPPER_HPP
#define XTENSOR_ZARRAY_WRAPPER_HPP
#include "zarray_impl.hpp"
namespace xt
{
/******************
* zarray_wrapper *
******************/
template <class CTE>
class zarray_wrapper : public ztyped_array<typename std::decay_t<CTE>::value_type>
{
public:
using self_type = zarray_wrapper;
using value_type = typename std::decay_t<CTE>::value_type;
using base_type = ztyped_array<value_type>;
using shape_type = typename base_type::shape_type;
using slice_vector = typename base_type::slice_vector;
template <class E>
zarray_wrapper(E&& e);
virtual ~zarray_wrapper() = default;
bool is_array() const override;
bool is_chunked() const override;
xarray<value_type>& get_array() override;
const xarray<value_type>& get_array() const override;
xarray<value_type> get_chunk(const slice_vector& slices) const override;
self_type* clone() const override;
std::ostream& print(std::ostream& out) const override;
zarray_impl* strided_view(slice_vector& slices) override;
const nlohmann::json& get_metadata() const override;
void set_metadata(const nlohmann::json& metadata) override;
std::size_t dimension() const override;
const shape_type& shape() const override;
void reshape(const shape_type&) override;
void reshape(shape_type&&) override;
void resize(const shape_type&) override;
void resize(shape_type&&) override;
bool broadcast_shape(shape_type& shape, bool reuse_cache = 0) const override;
private:
zarray_wrapper(const zarray_wrapper&) = default;
CTE m_array;
nlohmann::json m_metadata;
};
/*********************************
* zarray_wrapper implementation *
*********************************/
namespace detail
{
template <class T>
struct zarray_wrapper_helper
{
static inline xarray<T>& get_array(xarray<T>& ar)
{
return ar;
}
static inline xarray<T>& get_array(const xarray<T>&)
{
throw std::runtime_error("Cannot return non const array from const array");
}
template <class S>
static inline void reshape(xarray<T>& ar, S&& shape)
{
ar.reshape(std::forward<S>(shape));
}
template <class S>
static inline void reshape(const xarray<T>&, S&&)
{
throw std::runtime_error("Cannot reshape const array");
}
template <class S>
static inline void resize(xarray<T>& ar, S&& shape)
{
ar.resize(std::forward<S>(shape));
}
template <class S>
static inline void resize(const xarray<T>&, S&&)
{
throw std::runtime_error("Cannot resize const array");
}
};
}
template <class CTE>
template <class E>
inline zarray_wrapper<CTE>::zarray_wrapper(E&& e)
: base_type()
, m_array(std::forward<E>(e))
{
detail::set_data_type<value_type>(m_metadata);
}
template <class CTE>
bool zarray_wrapper<CTE>::is_array() const
{
return true;
}
template <class CTE>
bool zarray_wrapper<CTE>::is_chunked() const
{
return false;
}
template <class CTE>
auto zarray_wrapper<CTE>::get_array() -> xarray<value_type>&
{
return detail::zarray_wrapper_helper<value_type>::get_array(m_array);
}
template <class CTE>
auto zarray_wrapper<CTE>::get_array() const -> const xarray<value_type>&
{
return m_array;
}
template <class CTE>
auto zarray_wrapper<CTE>::get_chunk(const slice_vector& slices) const -> xarray<value_type>
{
return xt::strided_view(m_array, slices);
}
template <class CTE>
auto zarray_wrapper<CTE>::clone() const -> self_type*
{
return new self_type(*this);
}
template <class CTE>
std::ostream& zarray_wrapper<CTE>::print(std::ostream& out) const
{
return out << m_array;
}
template <class CTE>
zarray_impl* zarray_wrapper<CTE>::strided_view(slice_vector& slices)
{
auto e = xt::strided_view(m_array, slices);
return detail::build_zarray(std::move(e));
}
template <class CTE>
auto zarray_wrapper<CTE>::get_metadata() const -> const nlohmann::json&
{
return m_metadata;
}
template <class CTE>
void zarray_wrapper<CTE>::set_metadata(const nlohmann::json& metadata)
{
m_metadata = metadata;
}
template <class CTE>
std::size_t zarray_wrapper<CTE>::dimension() const
{
return m_array.dimension();
}
template <class CTE>
auto zarray_wrapper<CTE>::shape() const -> const shape_type&
{
return m_array.shape();
}
template <class CTE>
void zarray_wrapper<CTE>::reshape(const shape_type& shape)
{
detail::zarray_wrapper_helper<value_type>::reshape(m_array, shape);
}
template <class CTE>
void zarray_wrapper<CTE>::reshape(shape_type&& shape)
{
detail::zarray_wrapper_helper<value_type>::reshape(m_array, std::move(shape));
}
template <class CTE>
void zarray_wrapper<CTE>::resize(const shape_type& shape)
{
detail::zarray_wrapper_helper<value_type>::resize(m_array, shape);
}
template <class CTE>
void zarray_wrapper<CTE>::resize(shape_type&& shape)
{
detail::zarray_wrapper_helper<value_type>::resize(m_array, std::move(shape));
}
template <class CTE>
bool zarray_wrapper<CTE>::broadcast_shape(shape_type& shape, bool reuse_cache) const
{
return m_array.broadcast_shape(shape, reuse_cache);
}
}
#endif