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/* This file is part of the OpenLB library
*
* Copyright (C) 2019 Adrian Kummerlaender
* E-mail contact: info@openlb.net
* The most recent release of OpenLB can be downloaded at
* <http://www.openlb.net/>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef UTILITIES_FRACTION_H
#define UTILITIES_FRACTION_H
#include <stdexcept>
namespace olb {
namespace utilities {
/// Floating-point independent fraction type
class Fraction {
private:
const int _numerator;
const int _denominator;
public:
constexpr Fraction(int num, int denum):
_numerator(num), _denominator(denum) {
if (_denominator == 0) {
throw std::invalid_argument("denominator must not be zero");
}
}
constexpr Fraction(int parts[2]):
Fraction(parts[0], parts[1]) { }
constexpr Fraction(int num):
Fraction(num, 1) { }
constexpr Fraction():
Fraction(0) { }
template <typename T>
constexpr T as() const
{
return T(_numerator) / T(_denominator);
}
template <typename T>
constexpr T inverseAs() const
{
return _numerator != 0 ? T(_denominator) / T(_numerator) : throw std::invalid_argument("inverse of zero is undefined");
}
};
}
}
#endif
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