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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2013 Christian Seiler <christian@iwakd.de>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#ifndef EIGEN_CXX11_TENSOR_TENSORSTORAGE_H
#define EIGEN_CXX11_TENSOR_TENSORSTORAGE_H
#ifdef EIGEN_TENSOR_STORAGE_CTOR_PLUGIN
#define EIGEN_INTERNAL_TENSOR_STORAGE_CTOR_PLUGIN EIGEN_TENSOR_STORAGE_CTOR_PLUGIN;
#else
#define EIGEN_INTERNAL_TENSOR_STORAGE_CTOR_PLUGIN
#endif
namespace Eigen {
/** \internal
*
* \class TensorStorage
* \ingroup CXX11_Tensor_Module
*
* \brief Stores the data of a tensor
*
* This class stores the data of fixed-size, dynamic-size or mixed tensors
* in a way as compact as possible.
*
* \sa Tensor
*/
template<typename T, DenseIndex NumIndices_, DenseIndex Size, int Options_, typename Dimensions = void> class TensorStorage;
// Pure fixed-size storage
template<typename T, DenseIndex NumIndices_, DenseIndex Size, int Options_, typename FixedDimensions>
class TensorStorage
{
private:
EIGEN_ALIGN_DEFAULT T m_data[Size];
FixedDimensions m_dimensions;
public:
EIGEN_DEVICE_FUNC
EIGEN_STRONG_INLINE TensorStorage() {
EIGEN_STATIC_ASSERT(Size == FixedDimensions::total_size, YOU_MADE_A_PROGRAMMING_MISTAKE)
}
EIGEN_DEVICE_FUNC
EIGEN_STRONG_INLINE T *data() { return m_data; }
EIGEN_DEVICE_FUNC
EIGEN_STRONG_INLINE const T *data() const { return m_data; }
EIGEN_DEVICE_FUNC
EIGEN_STRONG_INLINE const FixedDimensions& dimensions() const { return m_dimensions; }
EIGEN_DEVICE_FUNC
EIGEN_STRONG_INLINE DenseIndex size() const { return m_dimensions.TotalSize(); }
};
// pure-dynamic, but without specification of all dimensions explicitly
template<typename T, DenseIndex NumIndices_, int Options_>
class TensorStorage<T, NumIndices_, Dynamic, Options_, void>
: public TensorStorage<T, NumIndices_, Dynamic, Options_, typename internal::gen_numeric_list_repeated<DenseIndex, NumIndices_, Dynamic>::type>
{
typedef TensorStorage<T, NumIndices_, Dynamic, Options_, typename internal::gen_numeric_list_repeated<DenseIndex, NumIndices_, Dynamic>::type> Base_;
public:
TensorStorage() { }
TensorStorage(const TensorStorage<T, NumIndices_, Dynamic, Options_, void>& other) : Base_(other) { }
TensorStorage(internal::constructor_without_unaligned_array_assert) : Base_(internal::constructor_without_unaligned_array_assert()) {}
TensorStorage(DenseIndex size, const array<DenseIndex, NumIndices_>& dimensions) : Base_(size, dimensions) {}
// TensorStorage<T, NumIndices_, Dynamic, Options_, void>& operator=(const TensorStorage<T, NumIndices_, Dynamic, Options_, void>&) = default;
};
// pure dynamic
template<typename T, DenseIndex NumIndices_, int Options_>
class TensorStorage<T, NumIndices_, Dynamic, Options_, typename internal::gen_numeric_list_repeated<DenseIndex, NumIndices_, Dynamic>::type>
{
T *m_data;
DSizes<DenseIndex, NumIndices_> m_dimensions;
typedef TensorStorage<T, NumIndices_, Dynamic, Options_, typename internal::gen_numeric_list_repeated<DenseIndex, NumIndices_, Dynamic>::type> Self_;
public:
TensorStorage() : m_data(0), m_dimensions() {}
TensorStorage(internal::constructor_without_unaligned_array_assert)
: m_data(0), m_dimensions(internal::template repeat<NumIndices_, DenseIndex>(0)) {}
TensorStorage(DenseIndex size, const array<DenseIndex, NumIndices_>& dimensions)
: m_data(internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(size)), m_dimensions(dimensions)
{ EIGEN_INTERNAL_TENSOR_STORAGE_CTOR_PLUGIN }
TensorStorage(const Self_& other)
: m_data(internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(internal::array_prod(other.m_dimensions)))
, m_dimensions(other.m_dimensions)
{
internal::smart_copy(other.m_data, other.m_data+internal::array_prod(other.m_dimensions), m_data);
}
Self_& operator=(const Self_& other)
{
if (this != &other) {
Self_ tmp(other);
this->swap(tmp);
}
return *this;
}
~TensorStorage() { internal::conditional_aligned_delete_auto<T,(Options_&DontAlign)==0>(m_data, internal::array_prod(m_dimensions)); }
void swap(Self_& other)
{ std::swap(m_data,other.m_data); std::swap(m_dimensions,other.m_dimensions); }
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const DSizes<DenseIndex, NumIndices_>& dimensions() const {return m_dimensions;}
EIGEN_DEVICE_FUNC void resize(DenseIndex size, const array<DenseIndex, NumIndices_>& nbDimensions)
{
const DenseIndex currentSz = internal::array_prod(m_dimensions);
if(size != currentSz)
{
internal::conditional_aligned_delete_auto<T,(Options_&DontAlign)==0>(m_data, currentSz);
if (size)
m_data = internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(size);
else
m_data = 0;
EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN
}
m_dimensions = nbDimensions;
}
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE T *data() { return m_data; }
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const T *data() const { return m_data; }
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE DenseIndex size() const { return m_dimensions.TotalSize(); }
};
} // end namespace Eigen
#endif // EIGEN_CXX11_TENSOR_TENSORSTORAGE_H
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