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/***************************************************************************** |
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* |
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* Copyright (C) 2021 Bjarne von Horn (vh at igh dot de). |
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* |
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* This file is part of the PdCom library. |
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* |
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* The PdCom library is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or (at your |
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* option) any later version. |
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* |
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* The PdCom library is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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* License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with the PdCom library. If not, see <http://www.gnu.org/licenses/>. |
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* |
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*****************************************************************************/ |
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#ifndef PDCOM_IMPL_SELECTOR_H |
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#define PDCOM_IMPL_SELECTOR_H |
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#include <functional> |
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#include <pdcom5/SizeTypeInfo.h> |
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#include <pdcom5/Variable.h> |
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#include <vector> |
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namespace PdCom { namespace impl { |
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class Variable; |
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/** Selector base class for creating views on multidimensional data. |
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* |
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* Developers have to override clone(), getRequiredSize() and getCopyFunction() |
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* in their derived class. |
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* |
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*/ |
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struct Selector |
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{ |
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using CopyFunctionType = std::function< |
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void(void * /* destination */, const void * /* src */)>; |
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virtual ~Selector() = default; |
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/** Required size of the view, in bytes. |
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* |
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* \return The required memory space for the view, in bytes. |
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*/ |
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virtual std::size_t getRequiredSize(const Variable &variable) const; |
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/** Smart memcpy(). |
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* |
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* \returns A functor which will copy arriving variable data to the provided |
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* view memory. |
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*/ |
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virtual CopyFunctionType getCopyFunction(const Variable &variable) const; |
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virtual PdCom::Variable::SetValueFuture applySetValue( |
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const Variable &variable, |
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const void *src_data, |
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TypeInfo::DataType src_type, |
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size_t src_count) const; |
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virtual SizeInfo getViewSizeInfo(const Variable &variable) const; |
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}; |
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/** Selects one scalar out of a vector or matrix. |
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* |
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* The index is in Row major format, ((layer, )row, column). |
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*/ |
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class ScalarSelector : public Selector |
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{ |
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std::vector<int> indices_; |
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public: |
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std::size_t getRequiredSize(const Variable &) const override; |
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CopyFunctionType getCopyFunction(const Variable &) const override; |
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ScalarSelector(std::vector<int> indices); |
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size_t getOffset(const Variable &variable) const; |
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SizeInfo getViewSizeInfo(const Variable &variable) const override; |
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PdCom::Variable::SetValueFuture applySetValue( |
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const Variable &variable, |
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const void *src_data, |
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TypeInfo::DataType src_type, |
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size_t src_count) const override; |
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}; |
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}} // namespace PdCom::impl |
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#endif // PDCOM_IMPL_SELECTOR_H |
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