private static T GetSimplifiedRational <T>(IValueHelper <T> valueHelper, T n, T d, out T denominator)
where T : struct, IComparable, IFormattable, IConvertible, IComparable <T>, IEquatable <T>
{
if (d.Equals(valueHelper.Zero))
{
throw new DivideByZeroException();
}
if (n.Equals(valueHelper.Zero))
{
denominator = valueHelper.PositiveOne;
return(valueHelper.Zero);
}
if (n.Equals(d))
{
denominator = valueHelper.PositiveOne;
return(valueHelper.PositiveOne);
}
if (d.CompareTo(valueHelper.Zero) < 0)
{
d = valueHelper.Multiply(d, valueHelper.NegativeOne);
n = valueHelper.Multiply(n, valueHelper.NegativeOne);
}
T gcd = GetGCD <T>(valueHelper, n, d);
denominator = valueHelper.Divide(d, gcd);
return(valueHelper.Divide(n, gcd));
}
private static void ToCommonDenominator <T>(IValueHelper <T> valueHelper, ref T n1, ref T d1, ref T n2, ref T d2)
where T : struct, IComparable, IFormattable, IConvertible, IComparable <T>, IEquatable <T>
{
if (d1.Equals(valueHelper.Zero) || d2.Equals(valueHelper.Zero))
{
throw new DivideByZeroException();
}
if (n1.Equals(valueHelper.Zero))
{
d1 = d2;
}
else if (n2.Equals(valueHelper.Zero))
{
d2 = d1;
}
else if (!d1.Equals(d2))
{
n1 = GetSimplifiedRational <T>(valueHelper, n1, d1, out d1);
n2 = GetSimplifiedRational <T>(valueHelper, n2, d2, out d2);
if (d1.Equals(valueHelper.PositiveOne))
{
n1 = valueHelper.Multiply(n1, d2);
}
else if (d2.Equals(valueHelper.PositiveOne))
{
n2 = valueHelper.Multiply(n2, d1);
}
else if (!d1.Equals(d2))
{
T m2;
T m1 = GetLCM <T>(valueHelper, d1, d2, out m2);
n1 = valueHelper.Multiply(n1, m1);
d1 = valueHelper.Multiply(d1, m1);
n2 = valueHelper.Multiply(n2, m1);
d2 = valueHelper.Multiply(d2, m1);
}
}
}
private static T GetInvertedRational <T>(IValueHelper <T> valueHelper, T w, T n, T d, out T numerator, out T denominator)
where T : struct, IComparable, IFormattable, IConvertible, IComparable <T>, IEquatable <T>
{
w = GetNormalizedRational <T>(valueHelper, w, n, d, out numerator, out denominator);
if (n.Equals(valueHelper.Zero))
{
if (w.Equals(valueHelper.Zero))
{
numerator = n;
return(w);
}
return(GetNormalizedRational <T>(valueHelper, valueHelper.Zero, valueHelper.PositiveOne, w, out numerator, out denominator));
}
if (w.Equals(valueHelper.Zero))
{
return(GetNormalizedRational <T>(valueHelper, valueHelper.Zero, d, n, out numerator, out denominator));
}
return(GetNormalizedRational <T>(valueHelper, valueHelper.Zero, d, valueHelper.Add(n, valueHelper.Multiply(d, w)), out numerator, out denominator));
}
