/// <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>Returns a random hand with the specified number of cards and constrained
/// to not contain any of the passed dead cards.
/// </summary>
/// <param name="dead">Mask for the cards that must not be returned.</param>
/// <param name="ncards">The number of cards to return in this hand.</param>
/// <param name="rnd">An instance of the Random class.</param>
/// <returns>A randomly chosen hand containing the number of cards requested.</returns>
public static UInt64Cards GetRandom(UInt64Cards dead, int ncards, MT19937Generator rnd)
{
// Return a random hand.
ulong mask = 0UL, card;
for (int i = 0; i < ncards; i++)
{
do
{
card = Bits.Flag[rnd.Next(52)];
}while (((dead.mask | mask) & card) != 0);
mask |= card;
}
return(new UInt64Cards(mask));
}
/// <summary>Creates sub hands.</summary>
public static UInt64Cards[] CreateSubHands(Cards hand)
{
var supHands = new UInt64Cards[6];
for (int i = 0; i < 6; i++)
{
var subset = new List <Card>();
for (var p = 0; p < 4; p++)
{
if ((Bits.Flag[p] & Mask4Over2[i]) != 0)
{
subset.Add(hand[p]);
}
}
supHands[i] = UInt64Cards.Create(subset);
}
return(supHands);
}
/// <summary>Gets a sub set of tables of the deck.</summary>
public UInt64Cards[] GetTableSubsets()
{
var subsets = new UInt64Cards[10];
var indexes = GetMaskIndexes(5);
for (var i = 0; i < 10; i++)
{
ulong s = 0;
for (var p = 0; p < 6; p++)
{
if ((Bits.Flag[p] & Mask5Over3[i]) != 0)
{
s |= indexes[p];
}
}
subsets[i] = new UInt64Cards(s);
}
return(subsets);
}
/// <summary>Gets a sub set of hands of the deck.</summary>
public UInt64Cards[] GetHandSubsets()
{
var subsets = new UInt64Cards[6];
var indexes = GetMaskIndexes(4);
for (var i = 0; i < 6; i++)
{
ulong s = 0;
for (var p = 0; p < 5; p++)
{
if ((Bits.Flag[p] & Mask4Over2[i]) != 0)
{
s |= indexes[p];
}
}
subsets[i] = new UInt64Cards(s);
}
return(subsets);
}
/// <summary>Remove selection from hand.</summary>
public UInt64Cards Combine(UInt64Cards s0, UInt64Cards s1)
{
return(new UInt64Cards(mask | s0.mask | s1.mask));
}
/// <summary>Remove selection from hand.</summary>
public UInt64Cards Combine(UInt64Cards selection)
{
return(new UInt64Cards(mask | selection.mask));
}
/// <summary>Remove selection from hand.</summary>
public UInt64Cards Remove(UInt64Cards selection)
{
return(new UInt64Cards(mask ^ selection.mask));
}