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94 lines
3.0 KiB
94 lines
3.0 KiB
11 years ago
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/*
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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/scatter.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 InputIterator1,
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typename InputIterator2,
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typename RandomAccessIterator>
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void scatter(thrust::execution_policy<DerivedPolicy> &exec,
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InputIterator1 first,
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InputIterator1 last,
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InputIterator2 map,
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RandomAccessIterator output)
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{
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thrust::transform(exec,
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first,
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last,
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thrust::make_permutation_iterator(output, map),
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thrust::identity<typename thrust::iterator_value<InputIterator1>::type>());
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} // end scatter()
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template<typename DerivedPolicy,
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typename InputIterator1,
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typename InputIterator2,
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typename InputIterator3,
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typename RandomAccessIterator>
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void scatter_if(thrust::execution_policy<DerivedPolicy> &exec,
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InputIterator1 first,
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InputIterator1 last,
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InputIterator2 map,
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InputIterator3 stencil,
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RandomAccessIterator output)
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{
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// default predicate is identity
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typedef typename thrust::iterator_value<InputIterator3>::type StencilType;
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thrust::scatter_if(exec, first, last, map, stencil, output, thrust::identity<StencilType>());
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} // end scatter_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 InputIterator3,
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typename RandomAccessIterator,
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typename Predicate>
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void scatter_if(thrust::execution_policy<DerivedPolicy> &exec,
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InputIterator1 first,
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InputIterator1 last,
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InputIterator2 map,
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InputIterator3 stencil,
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RandomAccessIterator output,
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Predicate pred)
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{
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typedef typename thrust::iterator_value<InputIterator1>::type InputType;
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thrust::transform_if(exec, first, last, stencil, thrust::make_permutation_iterator(output, map), thrust::identity<InputType>(), pred);
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} // end scatter_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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