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71 lines
1.7 KiB
71 lines
1.7 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 adjacent_difference.h
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* \brief Sequential implementation of adjacent_difference.
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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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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 BinaryFunction>
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OutputIterator adjacent_difference(InputIterator first,
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InputIterator last,
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OutputIterator result,
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BinaryFunction binary_op)
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{
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typedef typename thrust::iterator_traits<InputIterator>::value_type InputType;
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if (first == last)
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return result;
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InputType curr = *first;
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*result = curr;
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while (++first != last)
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{
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InputType next = *first;
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*(++result) = binary_op(next, curr);
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curr = next;
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}
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return ++result;
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}
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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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