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125 lines
5.1 KiB
125 lines
5.1 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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#pragma once |
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#include <thrust/detail/config.h> |
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#include <thrust/detail/static_assert.h> |
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#include <thrust/system/detail/generic/merge.h> |
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#include <thrust/merge.h> |
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#include <thrust/functional.h> |
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#include <thrust/iterator/zip_iterator.h> |
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#include <thrust/detail/internal_functional.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 OutputIterator, |
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typename StrictWeakOrdering> |
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OutputIterator merge(thrust::execution_policy<DerivedPolicy> &exec, |
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InputIterator1 first1, |
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InputIterator1 last1, |
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InputIterator2 first2, |
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InputIterator2 last2, |
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OutputIterator result, |
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StrictWeakOrdering comp) |
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{ |
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// unimplemented |
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THRUST_STATIC_ASSERT( (thrust::detail::depend_on_instantiation<InputIterator1, false>::value) ); |
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return result; |
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} // end merge() |
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template<typename DerivedPolicy, |
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typename InputIterator1, |
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typename InputIterator2, |
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typename OutputIterator> |
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OutputIterator merge(thrust::execution_policy<DerivedPolicy> &exec, |
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InputIterator1 first1, |
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InputIterator1 last1, |
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InputIterator2 first2, |
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InputIterator2 last2, |
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OutputIterator result) |
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{ |
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typedef typename thrust::iterator_value<InputIterator1>::type value_type; |
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return thrust::merge(exec,first1,last1,first2,last2,result,thrust::less<value_type>()); |
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} // end merge() |
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template<typename DerivedPolicy, typename InputIterator1, typename InputIterator2, typename InputIterator3, typename InputIterator4, typename OutputIterator1, typename OutputIterator2, typename Compare> |
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thrust::pair<OutputIterator1,OutputIterator2> |
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merge_by_key(thrust::execution_policy<DerivedPolicy> &exec, |
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InputIterator1 keys_first1, InputIterator1 keys_last1, |
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InputIterator2 keys_first2, InputIterator2 keys_last2, |
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InputIterator3 values_first1, InputIterator4 values_first2, |
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OutputIterator1 keys_result, |
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OutputIterator2 values_result, |
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Compare comp) |
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{ |
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typedef thrust::tuple<InputIterator1, InputIterator3> iterator_tuple1; |
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typedef thrust::tuple<InputIterator2, InputIterator4> iterator_tuple2; |
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typedef thrust::tuple<OutputIterator1, OutputIterator2> iterator_tuple3; |
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typedef thrust::zip_iterator<iterator_tuple1> zip_iterator1; |
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typedef thrust::zip_iterator<iterator_tuple2> zip_iterator2; |
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typedef thrust::zip_iterator<iterator_tuple3> zip_iterator3; |
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zip_iterator1 zipped_first1 = thrust::make_zip_iterator(thrust::make_tuple(keys_first1, values_first1)); |
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zip_iterator1 zipped_last1 = thrust::make_zip_iterator(thrust::make_tuple(keys_last1, values_first1)); |
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zip_iterator2 zipped_first2 = thrust::make_zip_iterator(thrust::make_tuple(keys_first2, values_first2)); |
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zip_iterator2 zipped_last2 = thrust::make_zip_iterator(thrust::make_tuple(keys_last2, values_first2)); |
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zip_iterator3 zipped_result = thrust::make_zip_iterator(thrust::make_tuple(keys_result, values_result)); |
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thrust::detail::compare_first<Compare> comp_first(comp); |
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iterator_tuple3 result = thrust::merge(exec, zipped_first1, zipped_last1, zipped_first2, zipped_last2, zipped_result, comp_first).get_iterator_tuple(); |
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return thrust::make_pair(thrust::get<0>(result), thrust::get<1>(result)); |
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} // end merge_by_key() |
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template<typename DerivedPolicy, typename InputIterator1, typename InputIterator2, typename InputIterator3, typename InputIterator4, typename OutputIterator1, typename OutputIterator2> |
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thrust::pair<OutputIterator1,OutputIterator2> |
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merge_by_key(thrust::execution_policy<DerivedPolicy> &exec, |
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InputIterator1 keys_first1, InputIterator1 keys_last1, |
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InputIterator2 keys_first2, InputIterator2 keys_last2, |
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InputIterator3 values_first1, InputIterator4 values_first2, |
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OutputIterator1 keys_result, |
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OutputIterator2 values_result) |
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{ |
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typedef typename thrust::iterator_value<InputIterator1>::type value_type; |
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return thrust::merge_by_key(exec, keys_first1, keys_last1, keys_first2, keys_last2, values_first1, values_first2, keys_result, values_result, thrust::less<value_type>()); |
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} // end merge_by_key() |
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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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