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102 lines
4.1 KiB
102 lines
4.1 KiB
/* |
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* Copyright 2008-2012 NVIDIA Corporation |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include <thrust/detail/config.h> |
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#include <thrust/system/detail/generic/gather.h> |
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#include <thrust/iterator/iterator_traits.h> |
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#include <thrust/functional.h> |
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#include <thrust/transform.h> |
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#include <thrust/iterator/permutation_iterator.h> |
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namespace thrust |
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{ |
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namespace system |
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{ |
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namespace detail |
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{ |
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namespace generic |
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{ |
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template<typename DerivedPolicy, |
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typename InputIterator, |
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typename RandomAccessIterator, |
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typename OutputIterator> |
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OutputIterator gather(thrust::execution_policy<DerivedPolicy> &exec, |
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InputIterator map_first, |
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InputIterator map_last, |
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RandomAccessIterator input_first, |
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OutputIterator result) |
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{ |
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return thrust::transform(exec, |
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thrust::make_permutation_iterator(input_first, map_first), |
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thrust::make_permutation_iterator(input_first, map_last), |
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result, |
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thrust::identity<typename thrust::iterator_value<RandomAccessIterator>::type>()); |
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} // end gather() |
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template<typename DerivedPolicy, |
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typename InputIterator1, |
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typename InputIterator2, |
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typename RandomAccessIterator, |
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typename OutputIterator> |
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OutputIterator gather_if(thrust::execution_policy<DerivedPolicy> &exec, |
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InputIterator1 map_first, |
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InputIterator1 map_last, |
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InputIterator2 stencil, |
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RandomAccessIterator input_first, |
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OutputIterator result) |
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{ |
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typedef typename thrust::iterator_value<InputIterator2>::type StencilType; |
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return thrust::gather_if(exec, |
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map_first, |
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map_last, |
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stencil, |
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input_first, |
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result, |
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thrust::identity<StencilType>()); |
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} // end gather_if() |
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template<typename DerivedPolicy, |
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typename InputIterator1, |
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typename InputIterator2, |
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typename RandomAccessIterator, |
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typename OutputIterator, |
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typename Predicate> |
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OutputIterator gather_if(thrust::execution_policy<DerivedPolicy> &exec, |
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InputIterator1 map_first, |
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InputIterator1 map_last, |
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InputIterator2 stencil, |
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RandomAccessIterator input_first, |
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OutputIterator result, |
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Predicate pred) |
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{ |
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typedef typename thrust::iterator_value<RandomAccessIterator>::type InputType; |
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return thrust::transform_if(exec, |
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thrust::make_permutation_iterator(input_first, map_first), |
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thrust::make_permutation_iterator(input_first, map_last), |
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stencil, |
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result, |
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thrust::identity<InputType>(), |
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pred); |
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} // end gather_if() |
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} // end namespace generic |
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} // end namespace detail |
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} // end namespace system |
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} // end namespace thrust |
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