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/******************************************************************************
* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the NVIDIA CORPORATION nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************/
#pragma once
#include <thrust/detail/config.h>
#if THRUST_DEVICE_COMPILER == THRUST_DEVICE_COMPILER_NVCC
#include <thrust/system/cuda/detail/transform.h>
#include <thrust/detail/internal_functional.h>
THRUST_NAMESPACE_BEGIN
namespace cuda_cub {
namespace __replace
{
template<class T>
struct constant_f
{
T value;
THRUST_FUNCTION
constant_f(T const &x) : value(x) {}
template<class U>
THRUST_DEVICE_FUNCTION
T operator()(U const &) const
{
return value;
}
}; // struct constant_f
template<class Predicate, class NewType, class OutputType>
struct new_value_if_f
{
Predicate pred;
NewType new_value;
THRUST_FUNCTION
new_value_if_f(Predicate pred_, NewType new_value_)
: pred(pred_), new_value(new_value_) {}
template<class T>
OutputType THRUST_DEVICE_FUNCTION
operator()(T const &x)
{
return pred(x) ? new_value : x;
}
template<class T, class P>
OutputType THRUST_DEVICE_FUNCTION
operator()(T const &x, P const& y)
{
return pred(y) ? new_value : x;
}
}; // struct new_value_if_f
} // namespace __replace
template <class Derived,
class Iterator,
class T>
void __host__ __device__
replace(execution_policy<Derived> &policy,
Iterator first,
Iterator last,
T const & old_value,
T const & new_value)
{
using thrust::placeholders::_1;
cuda_cub::transform_if(policy,
first,
last,
first,
__replace::constant_f<T>(new_value),
_1 == old_value);
}
template <class Derived,
class Iterator,
class Predicate,
class T>
void __host__ __device__
replace_if(execution_policy<Derived> &policy,
Iterator first,
Iterator last,
Predicate pred,
T const & new_value)
{
cuda_cub::transform_if(policy,
first,
last,
first,
__replace::constant_f<T>(new_value),
pred);
}
template <class Derived,
class Iterator,
class StencilIt,
class Predicate,
class T>
void __host__ __device__
replace_if(execution_policy<Derived> &policy,
Iterator first,
Iterator last,
StencilIt stencil,
Predicate pred,
T const & new_value)
{
cuda_cub::transform_if(policy,
first,
last,
stencil,
first,
__replace::constant_f<T>(new_value),
pred);
}
template <class Derived,
class InputIt,
class OutputIt,
class Predicate,
class T>
OutputIt __host__ __device__
replace_copy_if(execution_policy<Derived> &policy,
InputIt first,
InputIt last,
OutputIt result,
Predicate predicate,
T const & new_value)
{
typedef typename iterator_traits<OutputIt>::value_type output_type;
typedef __replace::new_value_if_f<Predicate, T, output_type> new_value_if_t;
return cuda_cub::transform(policy,
first,
last,
result,
new_value_if_t(predicate, new_value));
}
template <class Derived,
class InputIt,
class StencilIt,
class OutputIt,
class Predicate,
class T>
OutputIt __host__ __device__
replace_copy_if(execution_policy<Derived> &policy,
InputIt first,
InputIt last,
StencilIt stencil,
OutputIt result,
Predicate predicate,
T const & new_value)
{
typedef typename iterator_traits<OutputIt>::value_type output_type;
typedef __replace::new_value_if_f<Predicate, T, output_type> new_value_if_t;
return cuda_cub::transform(policy,
first,
last,
stencil,
result,
new_value_if_t(predicate, new_value));
}
template <class Derived,
class InputIt,
class OutputIt,
class T>
OutputIt __host__ __device__
replace_copy(execution_policy<Derived> &policy,
InputIt first,
InputIt last,
OutputIt result,
T const & old_value,
T const & new_value)
{
return cuda_cub::replace_copy_if(policy,
first,
last,
result,
thrust::detail::equal_to_value<T>(old_value),
new_value);
}
} // namespace cuda_cub
THRUST_NAMESPACE_END
#endif
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