private static void Truncate(ref Decimal d)
{
uint flags = d.uflags;
if ((flags & ScaleMask) != 0)
{
DecCalc.InternalRound(ref d, (byte)(flags >> ScaleShift), DecCalc.RoundingMode.Truncate);
}
}
// Rounds a Decimal to an integer value. The Decimal argument is rounded
// towards negative infinity.
//
public static Decimal Floor(Decimal d)
{
uint flags = d.uflags;
if ((flags & ScaleMask) != 0)
{
DecCalc.InternalRound(ref d, (byte)(flags >> ScaleShift), DecCalc.RoundingMode.Floor);
}
return(d);
}
private static Decimal Round(ref Decimal d, int decimals, MidpointRounding mode)
{
if ((uint)decimals > 28)
{
throw new ArgumentOutOfRangeException(nameof(decimals), SR.ArgumentOutOfRange_DecimalRound);
}
if ((uint)mode > (uint)MidpointRounding.AwayFromZero)
{
throw new ArgumentException(SR.Format(SR.Argument_InvalidEnumValue, mode, nameof(MidpointRounding)), nameof(mode));
}
int scale = d.Scale - decimals;
if (scale > 0)
{
DecCalc.InternalRound(ref d, (uint)scale, (DecCalc.RoundingMode)mode);
}
return(d);
}
