/// <summary>
/// Returns the popcount or cardinality of the union of the two sets. Neither
/// set is modified.
/// </summary>
public static long UnionCount(FixedBitSet a, FixedBitSet b)
{
long tot = BitUtil.Pop_Union(a.bits, b.bits, 0, Math.Min(a.numWords, b.numWords));
if (a.numWords < b.numWords)
{
tot += BitUtil.Pop_Array(b.bits, a.numWords, b.numWords - a.numWords);
}
else if (a.numWords > b.numWords)
{
tot += BitUtil.Pop_Array(a.bits, b.numWords, a.numWords - b.numWords);
}
return(tot);
}
/// <summary>
/// Returns the popcount or cardinality of the union of the two sets.
/// Neither set is modified.
/// </summary>
public static long UnionCount(OpenBitSet a, OpenBitSet b)
{
long tot = BitUtil.Pop_Union(a.m_bits, b.m_bits, 0, Math.Min(a.m_wlen, b.m_wlen));
if (a.m_wlen < b.m_wlen)
{
tot += BitUtil.Pop_Array(b.m_bits, a.m_wlen, b.m_wlen - a.m_wlen);
}
else if (a.m_wlen > b.m_wlen)
{
tot += BitUtil.Pop_Array(a.m_bits, b.m_wlen, a.m_wlen - b.m_wlen);
}
return(tot);
}
