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80 lines
2.7 KiB
80 lines
2.7 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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#pragma once |
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#include <thrust/detail/config.h> |
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#include <thrust/system/detail/generic/copy.h> |
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#include <thrust/functional.h> |
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#include <thrust/detail/internal_functional.h> |
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#include <thrust/transform.h> |
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#include <thrust/for_each.h> |
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#include <thrust/tuple.h> |
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#include <thrust/iterator/zip_iterator.h> |
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#include <thrust/iterator/detail/minimum_system.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 OutputIterator> |
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OutputIterator copy(thrust::execution_policy<DerivedPolicy> &exec, |
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InputIterator first, |
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InputIterator last, |
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OutputIterator result) |
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{ |
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typedef typename thrust::iterator_value<InputIterator>::type T; |
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return thrust::transform(exec, first, last, result, thrust::identity<T>()); |
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} // end copy() |
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template<typename DerivedPolicy, |
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typename InputIterator, |
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typename Size, |
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typename OutputIterator> |
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OutputIterator copy_n(thrust::execution_policy<DerivedPolicy> &exec, |
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InputIterator first, |
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Size n, |
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OutputIterator result) |
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{ |
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typedef typename thrust::iterator_value<InputIterator>::type value_type; |
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typedef thrust::identity<value_type> xfrm_type; |
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// XXX why do we need to do this? figure out why, and then see if we can do without |
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typedef typename thrust::detail::unary_transform_functor<DerivedPolicy,xfrm_type>::type functor_type; |
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typedef thrust::tuple<InputIterator,OutputIterator> iterator_tuple; |
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typedef thrust::zip_iterator<iterator_tuple> zip_iter; |
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zip_iter zipped = thrust::make_zip_iterator(thrust::make_tuple(first,result)); |
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return thrust::get<1>(thrust::for_each_n(exec, zipped, n, functor_type(xfrm_type())).get_iterator_tuple()); |
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} // end copy_n() |
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} // end generic |
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} // end detail |
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} // end system |
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} // end thrust |
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