public static bool ThreeOfAKind(BitHand startingHand, BitHand bestHand)
{
var hand = startingHand.Hand;
var clubCards = GetClubs(hand);
var diamondCards = GetDiamonds(hand);
var heartCards = GetHearts(hand);
var spadeCards = GetSpades(hand);
var cdh = (clubCards & diamondCards & heartCards);
var cds = (clubCards & diamondCards & spadeCards);
var chs = (clubCards & heartCards & spadeCards);
var dhs = (diamondCards & heartCards & spadeCards);
var trip = (cdh | cds | chs | dhs);
var hasTrip = trip > 0;
if (hasTrip)
{
// getting the max of the various cdh, cds, etc isn't going to work since they're basically just
// numbers without suits. They've got no real context. maxTrip just gives me a place to start.
// the Trip var tells us which card is triplicated, so we use that to create a mask to AND against
// the original hand to give us the three of a kind in the hand.
var tripMask = (trip) | (trip << 16) | (trip << 32) | (trip << 48);
var tripCards = tripMask & startingHand;
bestHand.Reset(tripCards);
}
return(hasTrip);
}
public static bool Pair(BitHand startingHand, BitHand bestHand)
{
var hand = startingHand.Hand;
var clubCards = GetClubs(hand);
var diamondCards = GetDiamonds(hand);
var heartCards = GetHearts(hand);
var spadeCards = GetSpades(hand);
ulong cd = clubCards & diamondCards,
ch = clubCards & heartCards,
cs = clubCards & spadeCards,
dh = diamondCards & heartCards,
ds = diamondCards & spadeCards,
hs = heartCards & spadeCards;
var pair = cd | ch | cs | dh | ds | hs;
var hasPair = pair > 0;
if (hasPair)
{
var pairMask = (pair) | (pair << 16) | (pair << 32) | (pair << 48);
var pairCards = pairMask & startingHand;
bestHand.Reset(pairCards);
}
return(hasPair);
}
private static bool IsFlush(BitHand startingHand, BitHand bestHand, ulong flushMask)
{
var hand = startingHand.Hand;
var clubCards = hand & SuitCards[Card.CardSuit.Clubs];
var diamondCards = hand & SuitCards[Card.CardSuit.Diamonds];
var heartCards = hand & SuitCards[Card.CardSuit.Hearts];
var spadeCards = hand & SuitCards[Card.CardSuit.Spades];
var possibleClubFlush = flushMask & clubCards;
var possibleDiamondFlush = flushMask & diamondCards;
var possibleHeartFlush = flushMask & heartCards;
var possibleSpadeFlush = flushMask & spadeCards;
var handFlushMask = possibleClubFlush | possibleDiamondFlush | possibleHeartFlush |
possibleSpadeFlush;
var handFlush = handFlushMask & startingHand;
if (handFlush == startingHand)
{
bestHand.Reset(handFlush);
return(true);
}
return(false);
}