libcruft-util/fixed.hpp

68 lines
2.4 KiB
C++

/*
* This file is part of libgim.
*
* libgim 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 3 of the License, or (at your option) any later
* version.
*
* libgim 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 libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2011, 2014 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __UTIL_FIXED_HPP
#define __UTIL_FIXED_HPP
#include "types/bits.hpp"
#include <cstdint>
namespace util {
template <unsigned int INT, unsigned int FRAC>
class fixed {
public:
typedef typename bits_type<INT + FRAC>::uint combined_type;
typedef typename bits_type<INT + FRAC>::uint integral_type;
combined_type m_value;
public:
explicit fixed(double);
explicit fixed(float);
explicit fixed(integral_type);
double to_double (void) const;
float to_float (void) const;
integral_type to_integral (void) const;
fixed<INT, FRAC>& operator +=(const fixed<INT, FRAC>);
fixed<INT, FRAC>& operator -=(const fixed<INT, FRAC>);
fixed<INT, FRAC>& operator *=(const fixed<INT, FRAC>);
fixed<INT, FRAC>& operator /=(const fixed<INT, FRAC>);
fixed<INT, FRAC> operator +(const fixed<INT, FRAC>) const;
fixed<INT, FRAC> operator -(const fixed<INT, FRAC>) const;
fixed<INT, FRAC> operator *(const fixed<INT, FRAC>) const;
fixed<INT, FRAC> operator /(const fixed<INT, FRAC>) const;
fixed<INT, FRAC>& operator +=(integral_type);
fixed<INT, FRAC>& operator -=(integral_type);
fixed<INT, FRAC>& operator *=(integral_type);
fixed<INT, FRAC>& operator /=(integral_type);
fixed<INT, FRAC> operator +(integral_type) const;
fixed<INT, FRAC> operator -(integral_type) const;
fixed<INT, FRAC> operator *(integral_type) const;
fixed<INT, FRAC> operator /(integral_type) const;
};
}
#endif // __UTIL_FIXED_HPP