e8be7686eb
The following regression tests fail and are temporarily commented out: - tst_mxml_io - tst_guitarpro - tst_scripting - tst_runscripts
98 lines
3.7 KiB
C++
98 lines
3.7 KiB
C++
//=============================================================================
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// MuseScore
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// Music Composition & Notation
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//
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// Copyright (C) 2009 Werner Schweer
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License version 2
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// as published by the Free Software Foundation and appearing in
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// the file LICENCE.GPL
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//=============================================================================
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#ifndef __FRACTION_H__
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#define __FRACTION_H__
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#include "config.h"
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namespace Ms {
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//---------------------------------------------------------
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// Fraction
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//---------------------------------------------------------
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class Fraction {
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int _numerator { 0 };
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int _denominator { 1 };
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public:
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#if 0
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// implicit conversion from int to Fraction: this is convenient but may hide some potential bugs
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constexpr Fraction(int z=0, int n=1) : _numerator(z), _denominator(n) {}
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#else
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// no implicit conversion from int to Fraction:
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constexpr Fraction() {}
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constexpr Fraction(int z, int n) : _numerator(z), _denominator(n) {}
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#endif
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int numerator() const { return _numerator; }
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int denominator() const { return _denominator; }
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int& rnumerator() { return _numerator; }
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int& rdenominator() { return _denominator; }
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void setNumerator(int v) { _numerator = v; }
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void setDenominator(int v) { _denominator = v; }
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void set(int z, int n) { _numerator = z; _denominator = n; }
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bool isZero() const { return _numerator == 0; }
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bool isNotZero() const { return _numerator != 0; }
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bool isValid() const { return _denominator != 0; }
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void reduce();
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Fraction reduced() const;
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Fraction absValue() const;
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// check if two fractions are identical (numerator & denominator)
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// == operator checks for equal value:
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bool identical(const Fraction& v) const {
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return (_numerator == v._numerator) && (_denominator == v._denominator);
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}
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int ticks() const;
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static Fraction fromTicks(int v);
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Fraction& operator+=(const Fraction&);
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Fraction& operator-=(const Fraction&);
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Fraction& operator*=(const Fraction&);
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Fraction& operator*=(int);
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Fraction& operator/=(const Fraction&);
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// Fraction& operator/=(int);
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Fraction operator+(const Fraction& v) const { return Fraction(*this) += v; }
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Fraction operator-(const Fraction& v) const { return Fraction(*this) -= v; }
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Fraction operator-() const { return Fraction(-_numerator, _denominator); }
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Fraction operator*(const Fraction& v) const { return Fraction(*this) *= v; }
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Fraction operator/(const Fraction& v) const { return Fraction(*this) /= v; }
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// Fraction operator/(int v) const { return Fraction(*this) /= v; }
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bool operator<(const Fraction&) const;
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bool operator<=(const Fraction&) const;
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bool operator>=(const Fraction&) const;
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bool operator>(const Fraction&) const;
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bool operator==(const Fraction&) const;
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bool operator!=(const Fraction&) const;
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QString print() const { return QString("%1/%2").arg(_numerator).arg(_denominator); }
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QString toString() const { return print(); }
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operator QVariant() const { return QVariant::fromValue(*this); }
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};
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inline Fraction operator*(const Fraction& f, int v) { return Fraction(f) *= v; }
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inline Fraction operator*(int v, const Fraction& f) { return Fraction(f) *= v; }
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} // namespace Ms
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Q_DECLARE_METATYPE(Ms::Fraction);
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#endif
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