98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
/*+
|
|
This is CosmoTool (./src/algo.hpp) -- Copyright (C) Guilhem Lavaux (2007-2013)
|
|
|
|
guilhem.lavaux@gmail.com
|
|
|
|
This software is a computer program whose purpose is to provide a toolbox for cosmological
|
|
data analysis (e.g. filters, generalized Fourier transforms, power spectra, ...)
|
|
|
|
This software is governed by the CeCILL license under French law and
|
|
abiding by the rules of distribution of free software. You can use,
|
|
modify and/ or redistribute the software under the terms of the CeCILL
|
|
license as circulated by CEA, CNRS and INRIA at the following URL
|
|
"http://www.cecill.info".
|
|
|
|
As a counterpart to the access to the source code and rights to copy,
|
|
modify and redistribute granted by the license, users are provided only
|
|
with a limited warranty and the software's author, the holder of the
|
|
economic rights, and the successive licensors have only limited
|
|
liability.
|
|
|
|
In this respect, the user's attention is drawn to the risks associated
|
|
with loading, using, modifying and/or developing or reproducing the
|
|
software by the user in light of its specific status of free software,
|
|
that may mean that it is complicated to manipulate, and that also
|
|
therefore means that it is reserved for developers and experienced
|
|
professionals having in-depth computer knowledge. Users are therefore
|
|
encouraged to load and test the software's suitability as regards their
|
|
requirements in conditions enabling the security of their systems and/or
|
|
data to be ensured and, more generally, to use and operate it in the
|
|
same conditions as regards security.
|
|
|
|
The fact that you are presently reading this means that you have had
|
|
knowledge of the CeCILL license and that you accept its terms.
|
|
+*/
|
|
#ifndef __COSMOTOOL_ALGO_HPP
|
|
#define __COSMOTOOL_ALGO_HPP
|
|
|
|
#include "config.hpp"
|
|
|
|
namespace CosmoTool
|
|
{
|
|
|
|
template<typename T>
|
|
T cube(T a)
|
|
{
|
|
return a*a*a;
|
|
}
|
|
|
|
template<typename T>
|
|
T square(T a)
|
|
{
|
|
return a*a;
|
|
}
|
|
|
|
template<int N>
|
|
class SPowerBase
|
|
{
|
|
public:
|
|
template<typename T>
|
|
static T spower(T a)
|
|
{
|
|
if (N<0)
|
|
{
|
|
return 1/SPowerBase<-N>::spower(a);
|
|
}
|
|
if ((N%2)==0)
|
|
{
|
|
T b = SPowerBase<N/2>::spower(a);
|
|
return b*b;
|
|
}
|
|
T b = SPowerBase<(N-1)/2>::spower(a);
|
|
return a*b*b;
|
|
}
|
|
};
|
|
|
|
template<>
|
|
class SPowerBase<0>
|
|
{
|
|
public:
|
|
template<typename T>
|
|
static T spower(T a)
|
|
{
|
|
return T(1);
|
|
}
|
|
};
|
|
|
|
template<int N, typename T>
|
|
T spower(T a)
|
|
{
|
|
return SPowerBase<N>::spower(a);
|
|
}
|
|
|
|
|
|
|
|
};
|
|
|
|
#endif
|