public override UnitConverter Concatenate(UnitConverter converter)
{
if (converter is AdditionOfConvertersConverter)
{
var ac = converter as AdditionOfConvertersConverter;
var f = first.Concatenate(ac.first);
var s = second.Concatenate(ac.second);
if (f.Concatenate(s).Equals(IDENTITY))
{
return(new ConstantConverter(0));
}
else if (f.Equals(IDENTITY) && s.Equals(IDENTITY))
{
return(new ConstantConverter(0));
}
else if (f.Equals(IDENTITY))
{
return(s);
}
else if (s.Equals(IDENTITY))
{
return(f);
}
else
{
return(new AdditionOfConvertersConverter(f, s));
}
}
else
{
return(base.Concatenate(converter));
}
}
public override UnitConverter ToStandardUnit()
{
UnitConverter ret = UnitConverter.IDENTITY;
if (HasOnlyStandardUnit())
{
return(ret);
}
for (int i = 0; i < elements.Length; i++)
{
Element e = elements[i];
UnitConverter uc = e.unit.ToStandardUnit();
if (!uc.isLinear)
{
throw new ArithmeticException("Cannot convert: " + e.unit + " is not linear");
}
if (e.root != 1)
{
throw new ArithmeticException("Cannot convert: " + e.unit + " holds a base unit with fractional exponent");
}
int pow = e.pow;
if (pow < 0)
{
pow = -pow;
uc = uc.Inverse();
}
for (int j = 0; j < pow; j++)
{
ret = ret.Concatenate(uc);
}
}
return(ret);
}
private static UnitConverter TransformOf(Unit unit)
{
if (unit is BaseUnit)
{
return(UnitConverter.IDENTITY);
}
ProductUnit productUnit = (ProductUnit)unit;
UnitConverter ret = UnitConverter.IDENTITY;
for (int i = 0; i < productUnit.unitCount; i++)
{
Unit u = productUnit.GetUnit(i);
UnitConverter converter = TransformOf(u);
if (!converter.isLinear)
{
throw new ArithmeticException("Cannot convert: " + unit + " is non-linear.");
}
if (productUnit.GetUnitRoot(i) != 1)
{
throw new ArithmeticException("Cannot convert: " + productUnit + " holds a base unit with a fractional exponent.");
}
int pow = productUnit.GetUnitPow(i);
if (pow < 0)
{
pow = -pow;
converter = converter.Inverse();
}
for (int j = 0; j < pow; j++)
{
ret = ret.Concatenate(converter);
}
}
return(ret);
}
public override UnitConverter Concatenate(UnitConverter converter)
{
if (converter is RationalConverter)
{
RationalConverter rc = (RationalConverter)converter;
long dividendLong = dividend * rc.dividend;
long divisorLong = divisor * rc.divisor;
double dividendDouble = ((double)dividend) * rc.dividend;
double divisorDouble = ((double)divisor) * rc.divisor;
if ((dividendLong != dividendDouble) || (divisorLong != divisorDouble))
{
return(new MultiplyConverter(dividendDouble / divisorDouble));
}
long gcd = Gcd(dividendLong, divisorLong);
return(ValueOf(dividendLong / gcd, divisorLong / gcd));
}
else if (converter is MultiplyConverter)
{
return(converter.Concatenate(this));
}
else if (converter is ConstantConverter)
{
var factor = dividend * ((ConstantConverter)converter).constant / dividend;
if (factor == 0)
{
return(new ConstantConverter(0));
}
else
{
return(new MultiplyConverter(factor));
}
}
else
{
return(base.Concatenate(converter));
}
}