public static BigFloat Truncate(BigFloat value)
{
var numerator = value.Numerator;
numerator -= BigInteger.Remainder(numerator, value.Denominator);
return(Factor(new BigFloat(numerator, value.Denominator)));
}
public BigFloat Floor()
{
if (numerator < 0)
{
numerator += denominator - BigInteger.Remainder(numerator, denominator);
}
else
{
numerator -= BigInteger.Remainder(numerator, denominator);
}
Factor();
return(this);
}
public static BigFloat Floor(BigFloat value)
{
var numerator = value.Numerator;
if (numerator < 0)
{
numerator += value.Denominator - BigInteger.Remainder(numerator, value.Denominator);
}
else
{
numerator -= BigInteger.Remainder(numerator, value.Denominator);
}
return(Factor(new BigFloat(numerator, value.Denominator)));
}
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 static BigFloat Decimals(BigFloat value) => new BigFloat(BigInteger.Remainder(value.Numerator, value.Denominator), value.Denominator);
public BigRational GetFractionPart()
{
return new BigRational(BigInteger.Remainder(m_numerator, m_denominator), m_denominator);
}
public BigFloat Decimals()
{
BigInteger result = BigInteger.Remainder(numerator, denominator);
return(new BigFloat(result, denominator));
}
public BigFloat Truncate()
{
numerator -= BigInteger.Remainder(numerator, denominator);
Factor();
return(this);
}