2015-09-01 21:42:45 +00:00
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//=============================================================================
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//
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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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//
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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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2017-09-20 21:33:44 +00:00
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// Copyright 2015 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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2015-09-01 21:42:45 +00:00
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 Los Alamos National Security.
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//
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2017-09-20 21:33:44 +00:00
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// Under the terms of Contract DE-NA0003525 with NTESS,
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2015-09-01 21:42:45 +00:00
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// the U.S. Government retains certain rights in this software.
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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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//=============================================================================
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#ifndef vtk_m_cont_ArrayHandleCast_h
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#define vtk_m_cont_ArrayHandleCast_h
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#include <vtkm/cont/ArrayHandleTransform.h>
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2017-05-18 14:29:41 +00:00
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namespace vtkm
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{
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namespace cont
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{
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2015-09-01 21:42:45 +00:00
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2017-05-18 14:29:41 +00:00
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namespace internal
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{
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2015-09-01 21:42:45 +00:00
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2017-05-18 14:29:41 +00:00
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template <typename FromType, typename ToType>
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2016-12-19 19:39:17 +00:00
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struct VTKM_ALWAYS_EXPORT Cast
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2015-09-01 21:42:45 +00:00
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{
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2016-10-19 22:42:58 +00:00
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VTKM_EXEC_CONT
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ToType operator()(const FromType& val) const { return static_cast<ToType>(val); }
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};
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} // namespace internal
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/// \brief Cast the values of an array to the specified type, on demand.
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///
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/// ArrayHandleCast is a specialization of ArrayHandleTransform. Given an ArrayHandle
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/// and a type, it creates a new handle that returns the elements of the array cast
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/// to the specified type.
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///
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2015-10-21 19:36:27 +00:00
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template <typename T, typename ArrayHandleType>
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2017-05-18 14:29:41 +00:00
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class ArrayHandleCast
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2017-05-30 14:00:01 +00:00
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: public vtkm::cont::ArrayHandleTransform<ArrayHandleType,
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2017-05-18 14:29:41 +00:00
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internal::Cast<typename ArrayHandleType::ValueType, T>,
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internal::Cast<T, typename ArrayHandleType::ValueType>>
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2015-09-22 14:11:51 +00:00
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{
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public:
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VTKM_ARRAY_HANDLE_SUBCLASS(
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2017-05-26 17:53:28 +00:00
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ArrayHandleCast,
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(ArrayHandleCast<T, ArrayHandleType>),
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2017-05-30 14:00:01 +00:00
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(vtkm::cont::ArrayHandleTransform<ArrayHandleType,
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2017-05-18 14:29:41 +00:00
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internal::Cast<typename ArrayHandleType::ValueType, T>,
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internal::Cast<T, typename ArrayHandleType::ValueType>>));
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2015-09-22 14:11:51 +00:00
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2017-05-18 14:29:41 +00:00
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ArrayHandleCast(const ArrayHandleType& handle)
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: Superclass(handle)
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2017-05-18 14:29:41 +00:00
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{
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}
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2015-09-22 14:11:51 +00:00
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};
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2017-09-27 16:56:22 +00:00
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namespace detail
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{
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2017-09-25 22:54:24 +00:00
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2017-09-27 16:56:22 +00:00
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template <typename CastType, typename OriginalType, typename ArrayType>
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struct MakeArrayHandleCastImpl
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{
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using ReturnType = vtkm::cont::ArrayHandleCast<CastType, ArrayType>;
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VTKM_CONT static ReturnType DoMake(const ArrayType& array) { return ReturnType(array); }
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};
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template <typename T, typename ArrayType>
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struct MakeArrayHandleCastImpl<T, T, ArrayType>
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{
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using ReturnType = ArrayType;
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VTKM_CONT static ReturnType DoMake(const ArrayType& array) { return array; }
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};
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} // namespace detail
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/// make_ArrayHandleCast is convenience function to generate an
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/// ArrayHandleCast.
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2017-09-25 22:54:24 +00:00
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///
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template <typename T, typename ArrayType>
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VTKM_CONT
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typename detail::MakeArrayHandleCastImpl<T, typename ArrayType::ValueType, ArrayType>::ReturnType
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make_ArrayHandleCast(const ArrayType& array, const T& = T())
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{
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VTKM_IS_ARRAY_HANDLE(ArrayType);
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using MakeImpl = detail::MakeArrayHandleCastImpl<T, typename ArrayType::ValueType, ArrayType>;
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return MakeImpl::DoMake(array);
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2017-09-25 22:54:24 +00:00
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}
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2015-09-01 21:42:45 +00:00
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}
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} // namespace vtkm::cont
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#endif // vtk_m_cont_ArrayHandleCast_h
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