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114 lines
3.6 KiB
114 lines
3.6 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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/*! \file unique.inl |
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* \brief Inline file for unique.h. |
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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/unique.h> |
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#include <thrust/iterator/iterator_traits.h> |
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#include <thrust/transform.h> |
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#include <thrust/unique.h> |
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#include <thrust/detail/temporary_array.h> |
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#include <thrust/detail/internal_functional.h> |
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#include <thrust/detail/copy_if.h> |
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#include <thrust/distance.h> |
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#include <thrust/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 ForwardIterator> |
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ForwardIterator unique(thrust::execution_policy<DerivedPolicy> &exec, |
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ForwardIterator first, |
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ForwardIterator last) |
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{ |
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typedef typename thrust::iterator_traits<ForwardIterator>::value_type InputType; |
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return thrust::unique(exec, first, last, thrust::equal_to<InputType>()); |
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} // end unique() |
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template<typename DerivedPolicy, |
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typename ForwardIterator, |
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typename BinaryPredicate> |
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ForwardIterator unique(thrust::execution_policy<DerivedPolicy> &exec, |
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ForwardIterator first, |
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ForwardIterator last, |
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BinaryPredicate binary_pred) |
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{ |
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typedef typename thrust::iterator_traits<ForwardIterator>::value_type InputType; |
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thrust::detail::temporary_array<InputType,DerivedPolicy> input(exec, first, last); |
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return thrust::unique_copy(exec, input.begin(), input.end(), first, binary_pred); |
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} // end unique() |
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template<typename DerivedPolicy, |
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typename InputIterator, |
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typename OutputIterator> |
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OutputIterator unique_copy(thrust::execution_policy<DerivedPolicy> &exec, |
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InputIterator first, |
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InputIterator last, |
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OutputIterator output) |
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{ |
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typedef typename thrust::iterator_value<InputIterator>::type value_type; |
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return thrust::unique_copy(exec, first,last,output,thrust::equal_to<value_type>()); |
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} // end unique_copy() |
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template<typename DerivedPolicy, |
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typename InputIterator, |
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typename OutputIterator, |
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typename BinaryPredicate> |
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OutputIterator unique_copy(thrust::execution_policy<DerivedPolicy> &exec, |
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InputIterator first, |
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InputIterator last, |
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OutputIterator output, |
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BinaryPredicate binary_pred) |
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{ |
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// empty sequence |
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if(first == last) |
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return output; |
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thrust::detail::temporary_array<int,DerivedPolicy> stencil(exec, thrust::distance(first, last)); |
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// mark first element in each group |
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stencil[0] = 1; |
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thrust::transform(exec, first, last - 1, first + 1, stencil.begin() + 1, thrust::detail::not2(binary_pred)); |
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return thrust::copy_if(exec, first, last, stencil.begin(), output, thrust::identity<int>()); |
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} // end unique_copy() |
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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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