private static SingleRange GetEquallyDividedSubRange(SingleRange singleRange, int numSubRanges, int mySubRangeIndex)
{
var rangeSize = singleRange.RangeSize();
uint portion = (uint)(rangeSize / numSubRanges);
uint remainder = (uint)(rangeSize - portion * numSubRanges);
uint start = singleRange.Begin;
for (int i = 0; i < numSubRanges; i++)
{
// (Begin, End]
uint end = (unchecked (start + portion));
// I want it to overflow on purpose. It will do the right thing.
if (remainder > 0)
{
end++;
remainder--;
}
if (i == mySubRangeIndex)
{
return(new SingleRange(start, end));
}
start = end; // nextStart
}
throw new ArgumentException(nameof(mySubRangeIndex));
}
