private static int GetLengthLength(int? length, out int shift)
{
if (!length.HasValue || (length <= sbyte.MaxValue))
{
shift = 0;
return 1;
}
else if (length <= byte.MaxValue)
{
// Since lengths are unsigned we will get a shift of 0 for lengths < 256. A shift of 0 is equivalent to 1
// byte, which is wrong for lengths > 127, see 8.1.3.5. For a shift > 0, the long form will be employed in
// any case, so the correction below really only applies when value is in the range [128, 255].
shift = 0;
return 2;
}
else
{
shift = Get8BitStartShift(length.Value, false);
return GetLengthFromShift8Bit(shift) + 1;
}
}
