114 lines
3.5 KiB
C++
114 lines
3.5 KiB
C++
// Copyright (C) 2007 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
|
|
|
|
#include <cmath>
|
|
|
|
namespace omptl
|
|
{
|
|
|
|
// Extentions
|
|
|
|
template <class Iterator,class T,class UnaryFunction, class BinaryFunction>
|
|
T transform_accumulate(Iterator first, Iterator last, T init,
|
|
UnaryFunction unary_op, BinaryFunction binary_op,
|
|
const unsigned P = _Pfunc::Pfunc());
|
|
|
|
template <class Iterator, class T, class UnaryFunction>
|
|
T transform_accumulate(Iterator first, Iterator last, T init,
|
|
UnaryFunction unary_op, const unsigned P = _Pfunc::Pfunc());
|
|
|
|
// "Manhattan" distance
|
|
template <class InputIterator1, class InputIterator2>
|
|
typename ::std::iterator_traits<InputIterator1>::value_type
|
|
L1(InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, const unsigned P = _Pfunc::Pfunc());
|
|
|
|
// "Euclidean" distance
|
|
template <class InputIterator1, class InputIterator2>
|
|
typename ::std::iterator_traits<InputIterator1>::value_type
|
|
L2(InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, const unsigned P = _Pfunc::Pfunc());
|
|
|
|
// "Euclidean" length
|
|
template <class InputIterator>
|
|
typename ::std::iterator_traits<InputIterator>::value_type
|
|
L2(InputIterator first, InputIterator last, const unsigned P = _Pfunc::Pfunc());
|
|
|
|
} // namespace
|
|
|
|
#ifdef _OPENMP
|
|
#include "omptl_numeric_extentions_par.h"
|
|
#else
|
|
#include "omptl_numeric_extentions_ser.h"
|
|
#endif
|
|
|
|
namespace omptl
|
|
{
|
|
|
|
// "Manhattan" distance
|
|
template <class InputIterator1, class InputIterator2>
|
|
typename ::std::iterator_traits<InputIterator1>::value_type
|
|
L1(InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, const unsigned P)
|
|
{
|
|
typedef typename ::std::iterator_traits<InputIterator1>::value_type VT;
|
|
return ::omptl::inner_product(first1, last1, first2, VT(0),
|
|
std::plus<VT>(), std::minus<VT>(), P);
|
|
}
|
|
|
|
template <typename T>
|
|
struct _MinusSq
|
|
{
|
|
T operator()(const T &lhs, const T &rhs) const
|
|
{
|
|
const T d = lhs - rhs;
|
|
return d*d;
|
|
}
|
|
};
|
|
|
|
// "Euclidean" distance
|
|
template <class InputIterator1, class InputIterator2>
|
|
typename ::std::iterator_traits<InputIterator1>::value_type
|
|
L2(InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, const unsigned P)
|
|
{
|
|
typedef typename ::std::iterator_traits<InputIterator1>::value_type VT;
|
|
return ::std::sqrt(::omptl::inner_product(first1, last1, first2, VT(0),
|
|
std::plus<VT>(), _MinusSq<VT>(), P));
|
|
}
|
|
|
|
template <typename T>
|
|
struct _Sq
|
|
{
|
|
T operator()(const T &d) const
|
|
{
|
|
return d*d;
|
|
}
|
|
};
|
|
|
|
// "Euclidean" length
|
|
template <class InputIterator>
|
|
typename ::std::iterator_traits<InputIterator>::value_type
|
|
L2(InputIterator first, InputIterator last, const unsigned P)
|
|
{
|
|
typedef typename ::std::iterator_traits<InputIterator>::value_type VT;
|
|
return ::std::sqrt(::omptl::transform_accumulate(first, last, VT(0),
|
|
_Sq<VT>(), std::plus<VT>(), P));
|
|
}
|
|
|
|
} /* namespace _OMPTL_EXTENTION_NAMESPACE */
|