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115 lines
3.6 KiB
115 lines
3.6 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.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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