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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.
*/
/*! \file extrema.h
* \brief Sequential implementations of extrema functions.
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/pair.h>
#include <thrust/detail/function.h>
#include <thrust/system/detail/sequential/execution_policy.h>
THRUST_NAMESPACE_BEGIN
namespace system
{
namespace detail
{
namespace sequential
{
__thrust_exec_check_disable__
template<typename DerivedPolicy,
typename ForwardIterator,
typename BinaryPredicate>
__host__ __device__
ForwardIterator min_element(sequential::execution_policy<DerivedPolicy> &,
ForwardIterator first,
ForwardIterator last,
BinaryPredicate comp)
{
// wrap comp
thrust::detail::wrapped_function<
BinaryPredicate,
bool
> wrapped_comp(comp);
ForwardIterator imin = first;
for(; first != last; ++first)
{
if(wrapped_comp(*first, *imin))
{
imin = first;
}
}
return imin;
}
__thrust_exec_check_disable__
template<typename DerivedPolicy,
typename ForwardIterator,
typename BinaryPredicate>
__host__ __device__
ForwardIterator max_element(sequential::execution_policy<DerivedPolicy> &,
ForwardIterator first,
ForwardIterator last,
BinaryPredicate comp)
{
// wrap comp
thrust::detail::wrapped_function<
BinaryPredicate,
bool
> wrapped_comp(comp);
ForwardIterator imax = first;
for(; first != last; ++first)
{
if(wrapped_comp(*imax, *first))
{
imax = first;
}
}
return imax;
}
__thrust_exec_check_disable__
template<typename DerivedPolicy,
typename ForwardIterator,
typename BinaryPredicate>
__host__ __device__
thrust::pair<ForwardIterator,ForwardIterator> minmax_element(sequential::execution_policy<DerivedPolicy> &,
ForwardIterator first,
ForwardIterator last,
BinaryPredicate comp)
{
// wrap comp
thrust::detail::wrapped_function<
BinaryPredicate,
bool
> wrapped_comp(comp);
ForwardIterator imin = first;
ForwardIterator imax = first;
for(; first != last; ++first)
{
if(wrapped_comp(*first, *imin))
{
imin = first;
}
if(wrapped_comp(*imax, *first))
{
imax = first;
}
}
return thrust::make_pair(imin, imax);
}
} // end namespace sequential
} // end namespace detail
} // end namespace system
THRUST_NAMESPACE_END
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