public bool MoveNext()
{
int pos;
if (m_reverse)
{
pos = ColaStore.IterateFindPrevious(m_items.Levels, m_cursors, m_min, m_max, m_items.Comparer, out m_current);
}
else
{
pos = ColaStore.IterateFindNext(m_items.Levels, m_cursors, m_min, m_max, m_items.Comparer, out m_current);
}
if (pos == NOT_FOUND)
{ // that was the last item!
return(false);
}
// update the bounds if necessary
if (pos == m_max)
{
if (m_cursors[m_max] == NOT_FOUND)
{
--m_max;
}
}
else if (pos == m_min)
{
if (m_cursors[m_min] == NOT_FOUND)
{
++m_min;
}
}
return(true);
}