5dd346007b
clang-format BinPack settings have been disabled to make sure that the VTK-m style guideline is obeyed.
147 lines
4.3 KiB
C++
147 lines
4.3 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_cont_ArrayHandleCounting_h
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#define vtk_m_cont_ArrayHandleCounting_h
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/StorageImplicit.h>
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#include <vtkm/VecTraits.h>
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namespace vtkm
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{
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namespace cont
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{
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namespace internal
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{
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/// \brief An implicit array portal that returns an counting value.
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template <class CountingValueType>
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class VTKM_ALWAYS_EXPORT ArrayPortalCounting
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{
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typedef typename vtkm::VecTraits<CountingValueType>::ComponentType ComponentType;
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public:
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typedef CountingValueType ValueType;
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VTKM_EXEC_CONT
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ArrayPortalCounting()
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: Start(0)
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, Step(1)
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, NumberOfValues(0)
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{
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}
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VTKM_EXEC_CONT
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ArrayPortalCounting(ValueType start, ValueType step, vtkm::Id numValues)
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: Start(start)
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, Step(step)
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, NumberOfValues(numValues)
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{
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}
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template <typename OtherValueType>
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VTKM_EXEC_CONT ArrayPortalCounting(const ArrayPortalCounting<OtherValueType>& src)
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: Start(src.Start)
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, Step(src.Step)
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, NumberOfValues(src.NumberOfValues)
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{
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}
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template <typename OtherValueType>
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VTKM_EXEC_CONT ArrayPortalCounting<ValueType>& operator=(
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const ArrayPortalCounting<OtherValueType>& src)
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{
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this->Start = src.Start;
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this->Step = src.Step;
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this->NumberOfValues = src.NumberOfValues;
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return *this;
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}
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VTKM_EXEC_CONT
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vtkm::Id GetNumberOfValues() const { return this->NumberOfValues; }
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VTKM_EXEC_CONT
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ValueType Get(vtkm::Id index) const
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{
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return ValueType(this->Start + this->Step * ValueType(static_cast<ComponentType>(index)));
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}
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VTKM_EXEC_CONT
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void Set(vtkm::Id vtkmNotUsed(index), const ValueType& vtkmNotUsed(value)) const
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{
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VTKM_ASSERT(false && "Cannot write to read-only counting array.");
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}
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private:
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ValueType Start;
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ValueType Step;
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vtkm::Id NumberOfValues;
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};
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/// A convenience class that provides a typedef to the appropriate tag for
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/// a counting storage.
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template <typename ConstantValueType>
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struct ArrayHandleCountingTraits
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{
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typedef vtkm::cont::StorageTagImplicit<
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vtkm::cont::internal::ArrayPortalCounting<ConstantValueType>>
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Tag;
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};
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} // namespace internal
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/// ArrayHandleCounting is a specialization of ArrayHandle. By default it
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/// contains a increment value, that is increment for each step between zero
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/// and the passed in length
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template <typename CountingValueType>
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class ArrayHandleCounting : public vtkm::cont::ArrayHandle<
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CountingValueType,
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typename internal::ArrayHandleCountingTraits<CountingValueType>::Tag>
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{
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public:
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VTKM_ARRAY_HANDLE_SUBCLASS(
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ArrayHandleCounting,
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(ArrayHandleCounting<CountingValueType>),
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(vtkm::cont::ArrayHandle<
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CountingValueType,
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typename internal::ArrayHandleCountingTraits<CountingValueType>::Tag>));
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VTKM_CONT
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ArrayHandleCounting(CountingValueType start, CountingValueType step, vtkm::Id length)
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: Superclass(typename Superclass::PortalConstControl(start, step, length))
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{
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}
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};
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/// A convenience function for creating an ArrayHandleCounting. It takes the
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/// value to start counting from and and the number of times to increment.
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template <typename CountingValueType>
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VTKM_CONT vtkm::cont::ArrayHandleCounting<CountingValueType>
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make_ArrayHandleCounting(CountingValueType start, CountingValueType step, vtkm::Id length)
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{
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return vtkm::cont::ArrayHandleCounting<CountingValueType>(start, step, length);
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}
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}
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} // namespace vtkm::cont
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#endif //vtk_m_cont_ArrayHandleCounting_h
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