mirror of
https://github.com/clementine-player/Clementine
synced 2024-12-25 01:02:37 +01:00
287 lines
9.2 KiB
C++
287 lines
9.2 KiB
C++
// Copyright (C) 2006 Fokko Beekhof
|
|
// Email contact: Fokko.Beekhof@cui.unige.ch
|
|
|
|
// The OMPTL library is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 2.1 of the License, or (at your option) any later version.
|
|
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// Lesser General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, write to the Free Software
|
|
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
#ifndef OMPTL_NUMERIC_H
|
|
#define OMPTL_NUMERIC_H 1
|
|
|
|
#include <utility>
|
|
#include <functional>
|
|
#include <iterator>
|
|
|
|
#include "omptl_algorithm"
|
|
#include "omptl_tools.h"
|
|
|
|
namespace omptl
|
|
{
|
|
|
|
template <class IteratorTag>
|
|
struct _Accumulate
|
|
{
|
|
template <class InputIterator, class T, class BinaryFunction>
|
|
static T accumulate(InputIterator first, InputIterator last, T init,
|
|
T par_init, BinaryFunction binary_op, const unsigned P)
|
|
{
|
|
assert(P > 0u);
|
|
if (_linear_serial_is_faster(first, last, P))
|
|
return ::std::accumulate(first, last, init, binary_op);
|
|
assert(2*(int)P <= std::distance(first, last));
|
|
|
|
::std::vector< ::std::pair<InputIterator, InputIterator> >
|
|
partitions(P);
|
|
::omptl::_partition_range(first, last, partitions, P);
|
|
|
|
::std::vector<T> results(P);
|
|
#pragma omp parallel for
|
|
for (int t = 0; t < int(P); ++t)
|
|
results[t] = ::std::accumulate( partitions[t].first,
|
|
partitions[t].second,
|
|
par_init, binary_op);
|
|
|
|
return ::std::accumulate(results.begin(), results.end(),
|
|
init, binary_op);
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct _Accumulate< ::std::input_iterator_tag >
|
|
{
|
|
template <class InputIterator, class T, class BinaryFunction>
|
|
static T accumulate(InputIterator first, InputIterator last, T init,
|
|
T par_init, BinaryFunction binary_op, const unsigned P)
|
|
{
|
|
return ::std::accumulate(first, last, init, binary_op);
|
|
}
|
|
};
|
|
|
|
template <class InputIterator, class BinaryFunction>
|
|
struct _AccumulateOp
|
|
{
|
|
template <class T>
|
|
static T accumulate(InputIterator first, InputIterator last, T init,
|
|
BinaryFunction binary_op, const unsigned P)
|
|
{
|
|
assert(P > 0u);
|
|
return ::std::accumulate(first, last, init, binary_op);
|
|
}
|
|
};
|
|
|
|
template <class InputIterator>
|
|
struct _AccumulateOp<InputIterator,
|
|
::std::plus<typename ::std::iterator_traits<InputIterator>::value_type> >
|
|
{
|
|
typedef ::std::plus<typename
|
|
::std::iterator_traits<InputIterator>::value_type>
|
|
BinaryFunction;
|
|
|
|
template <class T>
|
|
static T accumulate(InputIterator first, InputIterator last, T init,
|
|
BinaryFunction binary_op, const unsigned P)
|
|
{
|
|
assert(P > 0u);
|
|
return ::omptl::_Accumulate< typename
|
|
::std::iterator_traits<InputIterator>::iterator_category>::
|
|
accumulate(first, last, init, T(0), binary_op, P);
|
|
}
|
|
};
|
|
|
|
template <class InputIterator>
|
|
struct _AccumulateOp<InputIterator,
|
|
::std::multiplies<typename
|
|
::std::iterator_traits<InputIterator>::value_type> >
|
|
{
|
|
typedef ::std::multiplies<typename
|
|
::std::iterator_traits<InputIterator>::value_type>
|
|
BinaryFunction;
|
|
|
|
template <class T>
|
|
static T accumulate(InputIterator first, InputIterator last, T init,
|
|
BinaryFunction binary_op, const unsigned P)
|
|
{
|
|
assert(P > 0u);
|
|
return ::omptl::_Accumulate<typename
|
|
::std::iterator_traits<InputIterator>::iterator_category>::
|
|
accumulate(first, last, init, T(1), binary_op, P);
|
|
}
|
|
};
|
|
|
|
template <class InputIterator, class T, class BinaryFunction>
|
|
T accumulate(InputIterator first, InputIterator last, T init,
|
|
BinaryFunction binary_op, const unsigned P)
|
|
{
|
|
assert(P > 0u);
|
|
return ::omptl::_AccumulateOp<InputIterator, BinaryFunction>::
|
|
accumulate(first, last, init, binary_op, P);
|
|
}
|
|
|
|
template <class InputIterator, class T>
|
|
T accumulate(InputIterator first, InputIterator last, T init, const unsigned P)
|
|
{
|
|
assert(P > 0u);
|
|
typedef typename std::iterator_traits<InputIterator>::value_type VT;
|
|
|
|
return ::omptl::accumulate(first, last, init, std::plus<VT>(), P);
|
|
}
|
|
|
|
template <class InputIterator, class OutputIterator, class BinaryFunction>
|
|
OutputIterator adjacent_difference(InputIterator first, InputIterator last,
|
|
OutputIterator result,
|
|
BinaryFunction binary_op, const unsigned P)
|
|
{
|
|
return ::std::adjacent_difference(first, last, result, binary_op);
|
|
}
|
|
|
|
template <class InputIterator, class OutputIterator>
|
|
OutputIterator adjacent_difference(InputIterator first, InputIterator last,
|
|
OutputIterator result, const unsigned P)
|
|
{
|
|
// ::std::minus<typename ::std::iterator_traits<InputIterator>::value_type>()
|
|
return ::std::adjacent_difference(first, last, result);
|
|
}
|
|
|
|
template <class Iterator1Tag, class Iterator2Tag>
|
|
struct _InnerProduct
|
|
{
|
|
template <class InputIterator1, class InputIterator2, class T,
|
|
class BinaryFunction1, class BinaryFunction2>
|
|
static T inner_product( InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, T init,
|
|
BinaryFunction1 binary_op1,
|
|
BinaryFunction2 binary_op2, const unsigned P)
|
|
{
|
|
return ::std::inner_product(first1, last1, first2, init,
|
|
binary_op1, binary_op2);
|
|
}
|
|
|
|
template <class Iterator1, class Iterator2, class T,
|
|
class BinaryFunction2>
|
|
static T inner_product(Iterator1 first1, Iterator1 last1,
|
|
Iterator2 first2, T init,
|
|
::std::plus<T> binary_op1,
|
|
BinaryFunction2 binary_op2, const unsigned P)
|
|
{
|
|
assert(P > 0u);
|
|
if (_linear_serial_is_faster(first1, last1, P))
|
|
return ::std::inner_product(first1, last1, first2,
|
|
init, binary_op1, binary_op2);
|
|
|
|
assert(2*(int)P <= std::distance(first1, last1));
|
|
|
|
::std::vector< ::std::pair<Iterator1, Iterator1> >
|
|
partitions1(P);
|
|
::omptl::_partition_range(first1, last1, partitions1, P);
|
|
::std::vector<Iterator2> partitions2(P);
|
|
::omptl::_copy_partitions(partitions1, first2, partitions2, P);
|
|
|
|
#pragma omp parallel for reduction(+:init)
|
|
for (int t = 0; t < int(P); ++t)
|
|
init += ::std::inner_product( partitions1[t].first,
|
|
partitions1[t].second,
|
|
partitions2[t], T(0.0),
|
|
binary_op1, binary_op2);
|
|
|
|
return init;
|
|
}
|
|
};
|
|
|
|
template <class Iterator2Tag>
|
|
struct _InnerProduct< ::std::input_iterator_tag, Iterator2Tag>
|
|
{
|
|
template <class InputIterator1, class InputIterator2, class T,
|
|
class BinaryFunction1, class BinaryFunction2>
|
|
static T inner_product(InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, T init,
|
|
BinaryFunction1 binary_op1, BinaryFunction2 binary_op2,
|
|
const unsigned P)
|
|
{
|
|
return ::std::inner_product(first1, last1, first2, init,
|
|
binary_op1, binary_op2);
|
|
}
|
|
};
|
|
|
|
template <class Iterator1Tag>
|
|
struct _InnerProduct<Iterator1Tag, ::std::input_iterator_tag>
|
|
{
|
|
template <class InputIterator1, class InputIterator2, class T,
|
|
class BinaryFunction1, class BinaryFunction2>
|
|
static T inner_product(InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, T init,
|
|
BinaryFunction1 binary_op1, BinaryFunction2 binary_op2,
|
|
const unsigned P)
|
|
{
|
|
return ::std::inner_product(first1, last1, first2, init,
|
|
binary_op1, binary_op2);
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct _InnerProduct< ::std::input_iterator_tag, ::std::input_iterator_tag >
|
|
{
|
|
template <class InputIterator1, class InputIterator2, class T,
|
|
class BinaryFunction1, class BinaryFunction2>
|
|
static T inner_product(InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, T init,
|
|
BinaryFunction1 binary_op1, BinaryFunction2 binary_op2,
|
|
const unsigned P)
|
|
{
|
|
return ::std::inner_product(first1, last1, first2, init,
|
|
binary_op1, binary_op2);
|
|
}
|
|
};
|
|
|
|
|
|
template <class InputIterator1, class InputIterator2, class T,
|
|
class BinaryFunction1, class BinaryFunction2>
|
|
T inner_product(InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, T init,
|
|
BinaryFunction1 binary_op1, BinaryFunction2 binary_op2,
|
|
const unsigned P)
|
|
{
|
|
return _InnerProduct<
|
|
typename ::std::iterator_traits<InputIterator1>::iterator_category,
|
|
typename ::std::iterator_traits<InputIterator2>::iterator_category>
|
|
::inner_product(first1, last1, first2, init,
|
|
binary_op1, binary_op2, P);
|
|
}
|
|
|
|
template <class InputIterator1, class InputIterator2, class T>
|
|
T inner_product(InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, T init, const unsigned P)
|
|
{
|
|
return ::omptl::inner_product(first1, last1, first2, init,
|
|
::std::plus<T>(), ::std::multiplies<T>(), P);
|
|
}
|
|
|
|
template <class InputIterator, class OutputIterator, class BinaryOperation>
|
|
OutputIterator partial_sum(InputIterator first, InputIterator last,
|
|
OutputIterator result, BinaryOperation binary_op,
|
|
const unsigned P)
|
|
{
|
|
return ::std::partial_sum(first, last, result, binary_op);
|
|
}
|
|
|
|
template <class InputIterator, class OutputIterator>
|
|
OutputIterator partial_sum(InputIterator first, InputIterator last,
|
|
OutputIterator result, const unsigned P)
|
|
{
|
|
// ::std::plus<typename ::std::iterator_traits<InputIterator>::value_type>(),
|
|
return ::std::partial_sum(first, last, result);
|
|
}
|
|
|
|
} // namespace omptl
|
|
|
|
#endif /* OMPTL_NUMERIC_H */
|