public static double Log(double d)
{
// d == 0 ==> -Infty
Contract.Ensures(d != 0.0 || Double.IsNegativeInfinity(Contract.Result <double>()));
// 0 < d < 1 ==> < 0
Contract.Ensures(!(0.0 < d && d < 1.0) || Contract.Result <double>() < 0);
// d == 1 ==> 1
Contract.Ensures(d != 1.0 || Contract.Result <double>() == 0.0);
// d > 1 ==> > 1
Contract.Ensures(d <1.0 || Contract.Result <double>()> 0.0);
// d == NaN || d is -Infty ==> Nan
Contract.Ensures(!Double.IsNaN(d) || !Double.IsNegativeInfinity(d) || Double.IsNaN(Contract.Result <Double>()));
// d is +Infty ==> +Infty
Contract.Ensures(!Double.IsPositiveInfinity(d) || Double.IsPositiveInfinity(Contract.Result <Double>()));
return(default(double));
}
private static TimeSpan From(double value, long tickMultiplicator)
{
if (Double.IsNaN(value))
{
throw new ArgumentException(Locale.GetText("Value cannot be NaN."), "value");
}
if (Double.IsNegativeInfinity(value) || Double.IsPositiveInfinity(value) ||
(value < MinValue.Ticks) || (value > MaxValue.Ticks))
{
throw new OverflowException(Locale.GetText("Outside range [MinValue,MaxValue]"));
}
try {
value = (value * (tickMultiplicator / TicksPerMillisecond));
checked {
long val = (long)Math.Round(value);
return(new TimeSpan(val * TicksPerMillisecond));
}
}
catch (OverflowException) {
throw new OverflowException(Locale.GetText("Resulting timespan is too big."));
}
}