public static SimpleBigDecimal Norm(sbyte mu, SimpleBigDecimal u, SimpleBigDecimal v)
{
SimpleBigDecimal simpleBigDecimal = u.Multiply(u);
SimpleBigDecimal b = u.Multiply(v);
SimpleBigDecimal b2 = v.Multiply(v).ShiftLeft(1);
switch (mu)
{
case 1:
return(simpleBigDecimal.Add(b).Add(b2));
case -1:
return(simpleBigDecimal.Subtract(b).Add(b2));
default:
throw new ArgumentException("mu must be 1 or -1");
}
}
public static ZTauElement Round(SimpleBigDecimal lambda0, SimpleBigDecimal lambda1, sbyte mu)
{
int scale = lambda0.Scale;
if (lambda1.Scale != scale)
{
throw new ArgumentException("lambda0 and lambda1 do not have same scale");
}
if (mu != 1 && mu != -1)
{
throw new ArgumentException("mu must be 1 or -1");
}
BigInteger bigInteger = lambda0.Round();
BigInteger bigInteger2 = lambda1.Round();
SimpleBigDecimal simpleBigDecimal = lambda0.Subtract(bigInteger);
SimpleBigDecimal simpleBigDecimal2 = lambda1.Subtract(bigInteger2);
SimpleBigDecimal simpleBigDecimal3 = simpleBigDecimal.Add(simpleBigDecimal);
simpleBigDecimal3 = ((mu != 1) ? simpleBigDecimal3.Subtract(simpleBigDecimal2) : simpleBigDecimal3.Add(simpleBigDecimal2));
SimpleBigDecimal simpleBigDecimal4 = simpleBigDecimal2.Add(simpleBigDecimal2).Add(simpleBigDecimal2);
SimpleBigDecimal b = simpleBigDecimal4.Add(simpleBigDecimal2);
SimpleBigDecimal simpleBigDecimal5;
SimpleBigDecimal simpleBigDecimal6;
if (mu == 1)
{
simpleBigDecimal5 = simpleBigDecimal.Subtract(simpleBigDecimal4);
simpleBigDecimal6 = simpleBigDecimal.Add(b);
}
else
{
simpleBigDecimal5 = simpleBigDecimal.Add(simpleBigDecimal4);
simpleBigDecimal6 = simpleBigDecimal.Subtract(b);
}
sbyte b2 = 0;
sbyte b3 = 0;
if (simpleBigDecimal3.CompareTo(BigInteger.One) >= 0)
{
if (simpleBigDecimal5.CompareTo(MinusOne) < 0)
{
b3 = mu;
}
else
{
b2 = 1;
}
}
else if (simpleBigDecimal6.CompareTo(BigInteger.Two) >= 0)
{
b3 = mu;
}
if (simpleBigDecimal3.CompareTo(MinusOne) < 0)
{
if (simpleBigDecimal5.CompareTo(BigInteger.One) >= 0)
{
b3 = (sbyte)(-mu);
}
else
{
b2 = -1;
}
}
else if (simpleBigDecimal6.CompareTo(MinusTwo) < 0)
{
b3 = (sbyte)(-mu);
}
BigInteger u = bigInteger.Add(BigInteger.ValueOf(b2));
BigInteger v = bigInteger2.Add(BigInteger.ValueOf(b3));
return(new ZTauElement(u, v));
}
