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// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_MATH_RATIONAL_H_
#define COBALT_MATH_RATIONAL_H_
namespace cobalt {
namespace math {
// Describes a rational number and maintains two separate integer values for the
// numerator and denominator.
class Rational {
public:
Rational(int numerator, int denominator)
: numerator_(numerator), denominator_(denominator) {}
int numerator() const { return numerator_; }
int denominator() const { return denominator_; }
bool operator==(const Rational& other) const {
return static_cast<int64>(numerator_) * other.denominator_ ==
static_cast<int64>(denominator_) * other.numerator_;
}
bool operator>(const Rational& other) const {
return static_cast<int64>(numerator_) * other.denominator_ >
static_cast<int64>(denominator_) * other.numerator_;
}
bool operator>=(const Rational& other) const {
return static_cast<int64>(numerator_) * other.denominator_ >=
static_cast<int64>(denominator_) * other.numerator_;
}
bool operator<(const Rational& other) const {
return static_cast<int64>(numerator_) * other.denominator_ <
static_cast<int64>(denominator_) * other.numerator_;
}
bool operator<=(const Rational& other) const {
return static_cast<int64>(numerator_) * other.denominator_ <=
static_cast<int64>(denominator_) * other.numerator_;
}
private:
int numerator_;
int denominator_;
};
} // namespace math
} // namespace cobalt
#endif // COBALT_MATH_RATIONAL_H_