private void _CopyHead(RawNum source, int length, RawNum dest)
{
dest.Clear();
for (int i = 1; i <= length; i++)
{
int sourceIndex = source.Size - i;
var sourceDigit = source.Digits[sourceIndex];
dest.Digits.Add(sourceDigit);
}
}
private void _MultiplyByDigit(RawNum num, UInt32 digit, RawNum dest)
{
dest.Clear();
UInt32 overfit = 0;
foreach (UInt32 d in num.Digits)
{
UInt32 mulRes = d * digit + overfit;
overfit = mulRes >> 16;
dest.Digits.Add(mulRes & UInt16.MaxValue);
}
if (overfit > 0)
{
dest.Digits.Add(overfit);
}
}