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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/transform.h>
#include <thrust/for_each.h>
#include <thrust/iterator/iterator_traits.h>
#include <thrust/iterator/detail/minimum_system.h>
#include <thrust/tuple.h>
#include <thrust/iterator/zip_iterator.h>
#include <thrust/detail/internal_functional.h>
THRUST_NAMESPACE_BEGIN
namespace system
{
namespace detail
{
namespace generic
{
template<typename DerivedPolicy,
typename InputIterator,
typename OutputIterator,
typename UnaryFunction>
__host__ __device__
OutputIterator transform(thrust::execution_policy<DerivedPolicy> &exec,
InputIterator first,
InputIterator last,
OutputIterator result,
UnaryFunction op)
{
typedef thrust::detail::unary_transform_functor<UnaryFunction> UnaryTransformFunctor;
// make an iterator tuple
typedef thrust::tuple<InputIterator,OutputIterator> IteratorTuple;
typedef thrust::zip_iterator<IteratorTuple> ZipIterator;
ZipIterator zipped_result =
thrust::for_each(exec,
thrust::make_zip_iterator(thrust::make_tuple(first,result)),
thrust::make_zip_iterator(thrust::make_tuple(last,result)),
UnaryTransformFunctor(op));
return thrust::get<1>(zipped_result.get_iterator_tuple());
} // end transform()
template<typename DerivedPolicy,
typename InputIterator1,
typename InputIterator2,
typename OutputIterator,
typename BinaryFunction>
__host__ __device__
OutputIterator transform(thrust::execution_policy<DerivedPolicy> &exec,
InputIterator1 first1,
InputIterator1 last1,
InputIterator2 first2,
OutputIterator result,
BinaryFunction op)
{
// given the minimal system, determine the binary transform functor we need
typedef thrust::detail::binary_transform_functor<BinaryFunction> BinaryTransformFunctor;
// make an iterator tuple
typedef thrust::tuple<InputIterator1,InputIterator2,OutputIterator> IteratorTuple;
typedef thrust::zip_iterator<IteratorTuple> ZipIterator;
ZipIterator zipped_result =
thrust::for_each(exec,
thrust::make_zip_iterator(thrust::make_tuple(first1,first2,result)),
thrust::make_zip_iterator(thrust::make_tuple(last1,first2,result)),
BinaryTransformFunctor(op));
return thrust::get<2>(zipped_result.get_iterator_tuple());
} // end transform()
template<typename DerivedPolicy,
typename InputIterator,
typename ForwardIterator,
typename UnaryFunction,
typename Predicate>
__host__ __device__
ForwardIterator transform_if(thrust::execution_policy<DerivedPolicy> &exec,
InputIterator first,
InputIterator last,
ForwardIterator result,
UnaryFunction unary_op,
Predicate pred)
{
typedef thrust::detail::unary_transform_if_functor<UnaryFunction,Predicate> UnaryTransformIfFunctor;
// make an iterator tuple
typedef thrust::tuple<InputIterator,ForwardIterator> IteratorTuple;
typedef thrust::zip_iterator<IteratorTuple> ZipIterator;
ZipIterator zipped_result =
thrust::for_each(exec,
thrust::make_zip_iterator(thrust::make_tuple(first,result)),
thrust::make_zip_iterator(thrust::make_tuple(last,result)),
UnaryTransformIfFunctor(unary_op,pred));
return thrust::get<1>(zipped_result.get_iterator_tuple());
} // end transform_if()
template<typename DerivedPolicy,
typename InputIterator1,
typename InputIterator2,
typename ForwardIterator,
typename UnaryFunction,
typename Predicate>
__host__ __device__
ForwardIterator transform_if(thrust::execution_policy<DerivedPolicy> &exec,
InputIterator1 first,
InputIterator1 last,
InputIterator2 stencil,
ForwardIterator result,
UnaryFunction unary_op,
Predicate pred)
{
typedef thrust::detail::unary_transform_if_with_stencil_functor<UnaryFunction,Predicate> UnaryTransformIfFunctor;
// make an iterator tuple
typedef thrust::tuple<InputIterator1,InputIterator2,ForwardIterator> IteratorTuple;
typedef thrust::zip_iterator<IteratorTuple> ZipIterator;
ZipIterator zipped_result =
thrust::for_each(exec,
thrust::make_zip_iterator(thrust::make_tuple(first,stencil,result)),
thrust::make_zip_iterator(thrust::make_tuple(last,stencil,result)),
UnaryTransformIfFunctor(unary_op,pred));
return thrust::get<2>(zipped_result.get_iterator_tuple());
} // end transform_if()
template<typename DerivedPolicy,
typename InputIterator1,
typename InputIterator2,
typename InputIterator3,
typename ForwardIterator,
typename BinaryFunction,
typename Predicate>
__host__ __device__
ForwardIterator transform_if(thrust::execution_policy<DerivedPolicy> &exec,
InputIterator1 first1,
InputIterator1 last1,
InputIterator2 first2,
InputIterator3 stencil,
ForwardIterator result,
BinaryFunction binary_op,
Predicate pred)
{
typedef thrust::detail::binary_transform_if_functor<BinaryFunction,Predicate> BinaryTransformIfFunctor;
// make an iterator tuple
typedef thrust::tuple<InputIterator1,InputIterator2,InputIterator3,ForwardIterator> IteratorTuple;
typedef thrust::zip_iterator<IteratorTuple> ZipIterator;
ZipIterator zipped_result =
thrust::for_each(exec,
thrust::make_zip_iterator(thrust::make_tuple(first1,first2,stencil,result)),
thrust::make_zip_iterator(thrust::make_tuple(last1,first2,stencil,result)),
BinaryTransformIfFunctor(binary_op,pred));
return thrust::get<3>(zipped_result.get_iterator_tuple());
} // end transform_if()
} // end generic
} // end detail
} // end system
THRUST_NAMESPACE_END
|
