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91 lines
2.1 KiB
91 lines
2.1 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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/*! \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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