object IConvertible.ToType(Type conversionType, IFormatProvider provider)
{
var scaleDivisor = BigInteger.Pow(new BigInteger(10), this._scale);
var remainder = BigInteger.Remainder(this._unscaledValue, scaleDivisor);
var scaledValue = BigInteger.Divide(this._unscaledValue, scaleDivisor);
if (scaledValue > new BigInteger(Decimal.MaxValue))
{
throw new ArgumentOutOfRangeException("value", "The value " + this._unscaledValue + " cannot fit into " + conversionType.Name + ".");
}
var leftOfDecimal = (decimal)scaledValue;
var rightOfDecimal = ((decimal)remainder) / ((decimal)scaleDivisor);
var value = leftOfDecimal + rightOfDecimal;
return(Convert.ChangeType(value, conversionType));
}
/// <summary>
/// Find the great common divisor for a and b
/// </summary>
public static BigInteger FindGCD(BigInteger a, BigInteger b, out BigInteger x, out BigInteger y)
{
// Base Case
if (a == 0)
{
x = BigInteger.Zero;
y = BigInteger.One;
return(b);
}
// To store results of recursive call
var gcd = FindGCD(BigInteger.Remainder(b, a), a, out BigInteger x1, out BigInteger y1);
// Update x and y using results of recursive
// call
x = BigInteger.Subtract(y1, BigInteger.Multiply(BigInteger.Divide(b, a), x1));
y = new BigInteger(x1.ToByteArray());
return(gcd);
}
public int CompareTo(BigDecimal other)
{
var unscaledValueCompare = this._unscaledValue.CompareTo(other._unscaledValue);
var scaleCompare = this._scale.CompareTo(other._scale);
// if both are the same value, return the value
if (unscaledValueCompare == scaleCompare)
{
return(unscaledValueCompare);
}
// if the scales are both the same return unscaled value
if (scaleCompare == 0)
{
return(unscaledValueCompare);
}
var scaledValue = BigInteger.Divide(this._unscaledValue, BigInteger.Pow(new BigInteger(10), this._scale));
var otherScaledValue = BigInteger.Divide(other._unscaledValue, BigInteger.Pow(new BigInteger(10), other._scale));
return(scaledValue.CompareTo(otherScaledValue));
}
// ---- SECTION: public instance methods --------------*
#region Public Instance Methods
// GetWholePart() and GetFractionPart()
//
// BigRational == Whole, Fraction
// 0/2 == 0, 0/2
// 1/2 == 0, 1/2
// -1/2 == 0, -1/2
// 1/1 == 1, 0/1
// -1/1 == -1, 0/1
// -3/2 == -1, -1/2
// 3/2 == 1, 1/2
public BigInteger GetWholePart()
{
return BigInteger.Divide(m_numerator, m_denominator);
}
