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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _MIR_TENSOR_VARIANT_H_
#define _MIR_TENSOR_VARIANT_H_
#include "mir/Common.h"
#include "mir/Index.h"
#include "mir/TensorType.h"
#include <adtidas/SmallVector.h>
#include <cassert>
#include <memory>
namespace mir
{
class TensorVariant
{
public:
explicit TensorVariant(const TensorType &type);
TensorVariant(const TensorType &type, const void *data);
// TODO Remove as deprecated.
TensorVariant(DataType element_type, const Shape &shape);
// TODO Remove as deprecated.
TensorVariant(DataType element_type, const Shape &shape, const void *data);
TensorVariant(const TensorVariant &t_old, const Shape &shape);
virtual ~TensorVariant() = default;
char *at(const Index &idx) const { return _data.get() + getOffset(idx) * _element_size; }
char *atOffset(int32_t offset) const
{
assert(offset >= 0 && offset < getShape().numElements());
return _data.get() + offset * _element_size;
}
size_t getOffset(const Index &idx) const
{
assert(idx.rank() == getShape().rank());
std::size_t offset = 0;
for (int i = 0; i < getShape().rank(); ++i)
offset += idx.at(i) * _strides[i];
return offset;
}
const TensorType &getType() const { return _type; }
DataType getElementType() const { return _type.getElementType(); }
const Shape &getShape() const { return _type.getShape(); }
// TODO Replace uses with `getElementType` and remove.
DataType getDataType() const { return _type.getElementType(); }
// FIXME This should not be a member of this class.
size_t getElementSize() const { return _element_size; }
private:
TensorType _type;
std::shared_ptr<char> _data;
adt::small_vector<int_fast32_t, MAX_DIMENSION_COUNT> _strides;
size_t _element_size;
};
} // namespace mir
#endif //_MIR_TENSOR_VARIANT_H_
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