1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
* $URL$
* $Id$
*/
#ifndef COMMON_RATIONAL_H
#define COMMON_RATIONAL_H
#include "common/scummsys.h"
#include "common/frac.h"
namespace Common {
/** A simple rational class that holds fractions. */
class Rational {
public:
Rational();
Rational(int num);
Rational(int num, int denom);
Rational &operator=(const Rational &right);
Rational &operator=(int right);
Rational &operator+=(const Rational &right);
Rational &operator-=(const Rational &right);
Rational &operator*=(const Rational &right);
Rational &operator/=(const Rational &right);
Rational &operator+=(int right);
Rational &operator-=(int right);
Rational &operator*=(int right);
Rational &operator/=(int right);
const Rational operator-() const;
const Rational operator+(const Rational &right) const;
const Rational operator-(const Rational &right) const;
const Rational operator*(const Rational &right) const;
const Rational operator/(const Rational &right) const;
const Rational operator+(int right) const;
const Rational operator-(int right) const;
const Rational operator*(int right) const;
const Rational operator/(int right) const;
bool operator==(const Rational &right) const;
bool operator!=(const Rational &right) const;
bool operator>(const Rational &right) const;
bool operator<(const Rational &right) const;
bool operator>=(const Rational &right) const;
bool operator<=(const Rational &right) const;
bool operator==(int right) const;
bool operator!=(int right) const;
bool operator>(int right) const;
bool operator<(int right) const;
bool operator>=(int right) const;
bool operator<=(int right) const;
operator int() const;
operator double() const;
void invert();
Rational getInverse() const;
int toInt() const;
double toDouble() const;
frac_t toFrac() const;
private:
int _num;
int _denom;
void cancel();
void normalize();
};
const Rational operator+(int left, const Rational &right);
const Rational operator-(int left, const Rational &right);
const Rational operator*(int left, const Rational &right);
const Rational operator/(int left, const Rational &right);
bool operator==(int left, const Rational &right);
bool operator!=(int left, const Rational &right);
bool operator>(int left, const Rational &right);
bool operator<(int left, const Rational &right);
bool operator>=(int left, const Rational &right);
bool operator<=(int left, const Rational &right);
} // End of namespace Common
#endif
|
