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90 lines
2.1 KiB
90 lines
2.1 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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/*! \file unique.h |
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* \brief Sequential implementations of unique algorithms. |
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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/iterator/iterator_traits.h> |
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#include <thrust/pair.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 internal |
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{ |
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namespace scalar |
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{ |
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template<typename InputIterator, |
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typename OutputIterator, |
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typename BinaryPredicate> |
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OutputIterator unique_copy(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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typedef typename thrust::iterator_traits<InputIterator>::value_type T; |
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if(first != last) |
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{ |
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T prev = *first; |
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for(++first; first != last; ++first) |
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{ |
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T temp = *first; |
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if (!binary_pred(prev, temp)) |
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{ |
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*output = prev; |
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++output; |
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prev = temp; |
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} |
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} |
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*output = prev; |
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++output; |
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} |
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return output; |
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} // end unique_copy() |
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template<typename ForwardIterator, |
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typename BinaryPredicate> |
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ForwardIterator unique(ForwardIterator first, |
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ForwardIterator last, |
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BinaryPredicate binary_pred) |
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{ |
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// unique_copy() permits in-situ operation |
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return thrust::system::detail::internal::scalar::unique_copy(first, last, first, binary_pred); |
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} // end unique() |
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} // end namespace scalar |
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} // end namespace internal |
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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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