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/*
* Copyright 2008-2013 NVIDIA Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/system/detail/generic/copy.h>
#include <thrust/functional.h>
#include <thrust/detail/internal_functional.h>
#include <thrust/transform.h>
#include <thrust/for_each.h>
#include <thrust/tuple.h>
#include <thrust/iterator/zip_iterator.h>
#include <thrust/iterator/detail/minimum_system.h>
THRUST_NAMESPACE_BEGIN
namespace system
{
namespace detail
{
namespace generic
{
template<typename DerivedPolicy,
typename InputIterator,
typename OutputIterator>
__host__ __device__
OutputIterator copy(thrust::execution_policy<DerivedPolicy> &exec,
InputIterator first,
InputIterator last,
OutputIterator result)
{
typedef typename thrust::iterator_value<InputIterator>::type T;
return thrust::transform(exec, first, last, result, thrust::identity<T>());
} // end copy()
template<typename DerivedPolicy,
typename InputIterator,
typename Size,
typename OutputIterator>
__host__ __device__
OutputIterator copy_n(thrust::execution_policy<DerivedPolicy> &exec,
InputIterator first,
Size n,
OutputIterator result)
{
typedef typename thrust::iterator_value<InputIterator>::type value_type;
typedef thrust::identity<value_type> xfrm_type;
typedef thrust::detail::unary_transform_functor<xfrm_type> functor_type;
typedef thrust::tuple<InputIterator,OutputIterator> iterator_tuple;
typedef thrust::zip_iterator<iterator_tuple> zip_iter;
zip_iter zipped = thrust::make_zip_iterator(thrust::make_tuple(first,result));
return thrust::get<1>(thrust::for_each_n(exec, zipped, n, functor_type(xfrm_type())).get_iterator_tuple());
} // end copy_n()
} // end generic
} // end detail
} // end system
THRUST_NAMESPACE_END
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