/// <summary>
/// Returns the index of the first bit that is cleared.
/// -1 is returned if all bits are set.
/// </summary>
/// <returns></returns>
public int FindClearedBit()
{
//parse each item, 32 bits at a time
int count = m_array.Length;
for (int x = m_lastFoundClearedIndex >> BitsPerElementShift; x < count; x++)
{
//If the result is not -1 (all bits set), then use this element
if (m_array[x] != -1)
{
int position = BitMath.CountTrailingOnes((uint)m_array[x]) + (x << BitsPerElementShift);
m_lastFoundClearedIndex = position;
if (m_lastFoundClearedIndex >= m_count)
{
return(-1);
}
return(position);
}
}
return(-1);
}