You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
75 lines
2.5 KiB
75 lines
2.5 KiB
/* |
|
* Copyright 2008-2012 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. |
|
*/ |
|
|
|
#include <thrust/detail/config.h> |
|
#include <thrust/system/detail/generic/count.h> |
|
#include <thrust/transform_reduce.h> |
|
#include <thrust/detail/internal_functional.h> |
|
|
|
namespace thrust |
|
{ |
|
namespace system |
|
{ |
|
namespace detail |
|
{ |
|
namespace generic |
|
{ |
|
|
|
template <typename InputType, typename Predicate, typename CountType> |
|
struct count_if_transform |
|
{ |
|
__host__ __device__ |
|
count_if_transform(Predicate _pred) : pred(_pred){} |
|
|
|
__host__ __device__ |
|
CountType operator()(const InputType& val) |
|
{ |
|
if(pred(val)) |
|
return 1; |
|
else |
|
return 0; |
|
} // end operator() |
|
|
|
Predicate pred; |
|
}; // end count_if_transform |
|
|
|
template <typename DerivedPolicy, typename InputIterator, typename EqualityComparable> |
|
typename thrust::iterator_traits<InputIterator>::difference_type |
|
count(thrust::execution_policy<DerivedPolicy> &exec, InputIterator first, InputIterator last, const EqualityComparable& value) |
|
{ |
|
typedef typename thrust::iterator_traits<InputIterator>::value_type InputType; |
|
|
|
// XXX use placeholder expression here |
|
return thrust::count_if(exec, first, last, thrust::detail::equal_to_value<EqualityComparable>(value)); |
|
} // end count() |
|
|
|
template <typename DerivedPolicy, typename InputIterator, typename Predicate> |
|
typename thrust::iterator_traits<InputIterator>::difference_type |
|
count_if(thrust::execution_policy<DerivedPolicy> &exec, InputIterator first, InputIterator last, Predicate pred) |
|
{ |
|
typedef typename thrust::iterator_traits<InputIterator>::value_type InputType; |
|
typedef typename thrust::iterator_traits<InputIterator>::difference_type CountType; |
|
|
|
thrust::system::detail::generic::count_if_transform<InputType, Predicate, CountType> unary_op(pred); |
|
thrust::plus<CountType> binary_op; |
|
return thrust::transform_reduce(exec, first, last, unary_op, CountType(0), binary_op); |
|
} // end count_if() |
|
|
|
} // end generic |
|
} // end detail |
|
} // end system |
|
} // end thrust |
|
|
|
|