/// <summary>Calculates the winning change of a hand.</summary>
public static PokerHandOutcome Calculate(Cards hand, Cards table, MT19937Generator rnd, int runs = 1000)
{
UInt64Cards[] tblSub = null;
var tAdd = 5 - table.Count;
var uhnd = UInt64Cards.Create(hand);
var utbl = UInt64Cards.Create(table);
var dead = uhnd.Combine(utbl);
var ownSub = uhnd.GetHandSubsets();
var w = 0;
var d = 0;
var l = 0;
if (tAdd == 0)
{
tblSub = utbl.GetTableSubsets();
}
for (var i = 0; i < runs; i++)
{
var tbl = utbl;
if (tAdd > 0)
{
tbl = tbl.Combine(UInt64Cards.GetRandom(dead, tAdd, rnd));
tblSub = tbl.GetTableSubsets();
}
var uopp = UInt64Cards.GetRandom(dead.Combine(tbl), 4, rnd);
var oppSub = uopp.GetHandSubsets();
var c = UInt32PokerHand.Compare(ownSub, oppSub, tblSub);
if (c > 0)
{
w++;
}
else if (c < 0)
{
l++;
}
else
{
d++;
}
}
return(new PokerHandOutcome(w, d, l));
}
/// <summary>Gets the score of a the cards.</summary>
public UInt32PokerHand GetScore()
{
#if DEBUG
if (this.Count != 5)
{
throw new InvalidOperationException("The number of cards is not 5.");
}
#endif
uint rankX, mask1, mask2, mask3, mask4;
var sd = CardMask(mask, CardSuit.Diamonds);
var sc = CardMask(mask, CardSuit.Clubs);
var sh = CardMask(mask, CardSuit.Hearts);
var ss = CardMask(mask, CardSuit.Spades);
var mask5 = sc | sd | sh | ss;
var mask5Count = Bits.Count(mask5);
switch (mask5Count)
{
// FourOfAKind or FullHouse
case 2:
mask4 = sh & sd & sc & ss;
if (mask4 != 0)
{
rankX = GetSingleValue(mask4) | (mask5 ^ mask4);
return(UInt32PokerHand.Create(PokerHandType.FourOfAKind, rankX));
}
else
{
mask3 = ((sc & sd) | (sh & ss)) & ((sc & sh) | (sd & ss));
rankX = GetSingleValue(mask3) | (mask5 ^ mask3);
return(UInt32PokerHand.Create(PokerHandType.FullHouse, rankX));
}
// Three of a kind, or two pair.
case 3:
mask2 = mask5 ^ (sc ^ sd ^ sh ^ ss);
if (mask2 != 0)
{
rankX = mask2 << 4;
mask1 = mask5 ^ mask2;
rankX |= GetSingleValue(mask1) >> 13;
return(UInt32PokerHand.Create(PokerHandType.TwoPair, rankX));
}
else
{
mask3 = ((sc & sd) | (sh & ss)) & ((sc & sh) | (sd & ss));
rankX = GetSingleValue(mask3) | (mask5 ^ mask3);
return(UInt32PokerHand.Create(PokerHandType.ThreeOfAKind, rankX));
}
// One pair.
case 4:
mask2 = mask5 ^ (sc ^ sd ^ sh ^ ss);
rankX = GetSingleValue(mask2) | (mask5 ^ mask2);
return(UInt32PokerHand.Create(PokerHandType.OnePair, rankX));
// Straight and or flush, or high card.
case 5:
default:
rankX = GetStraightValue(mask5);
if (rankX != 0)
{
return(UInt32PokerHand.Create(IsFlush ? PokerHandType.StraightFlush : PokerHandType.Straight, rankX));
}
if (IsFlush)
{
return(UInt32PokerHand.Create(PokerHandType.Flush, mask5));
}
return(UInt32PokerHand.Create(PokerHandType.HighCard, mask5));
}
}