private bool CanCastle(ECastleling type)
{
// ReSharper disable once SwitchStatementMissingSomeCases
switch (type)
{
case ECastleling.Short:
case ECastleling.Long:
return((CastlelingRights & type.GetCastleAllowedMask(SideToMove)) != 0 && IsCastleAllowed(type.GetKingCastleTo(SideToMove)));
default:
throw new ArgumentException("Illegal castleling type.");
}
}
internal static ECastlelingRights GetCastleAllowedMask(this ECastleling castleType, Player side)
{
switch (castleType)
{
case ECastleling.Short:
return(OoAllowedMask[side.Side]);
case ECastleling.Long:
return(OooAllowedMask[side.Side]);
default:
throw new ArgumentOutOfRangeException(nameof(castleType), castleType, null);
}
}
public static Square GetKingCastleTo(this ECastleling castleType, Player side)
{
switch (castleType)
{
case ECastleling.Short:
return(OoKingTo[side.Side]);
case ECastleling.Long:
return(OooKingTo[side.Side]);
default:
throw new ArgumentOutOfRangeException(nameof(castleType), castleType, null);
}
}
public Square GetKingCastleFrom(Player side, ECastleling castleType)
{
switch (castleType)
{
case ECastleling.Short:
return(_castleShortKingFrom[side.Side]);
case ECastleling.Long:
return(_castleLongKingFrom[side.Side]);
default:
throw new ArgumentOutOfRangeException(nameof(castleType), castleType, null);
}
}
internal static int GetCastleAllowedMask(this ECastleling castleType, Player side)
{
// ReSharper disable once SwitchStatementMissingSomeCases
switch (castleType)
{
case ECastleling.Short:
return(OoAllowedMask[side.Side]);
case ECastleling.Long:
return(OooAllowedMask[side.Side]);
default:
throw new ArgumentOutOfRangeException(nameof(castleType), castleType, null);
}
}
public static Square GetKingCastleTo(this ECastleling castleType, Player side)
{
// ReSharper disable once SwitchStatementMissingSomeCases
switch (castleType)
{
case ECastleling.Short:
return(OoKingTo[side.Side]);
case ECastleling.Long:
return(OooKingTo[side.Side]);
default:
throw new ArgumentOutOfRangeException(nameof(castleType), castleType, null);
}
}
public void SetKingCastleFrom(Player side, Square square, ECastleling castleType)
{
switch (castleType)
{
case ECastleling.Short:
_castleShortKingFrom[side.Side] = square;
break;
case ECastleling.Long:
_castleLongKingFrom[side.Side] = square;
break;
default:
throw new ArgumentOutOfRangeException(nameof(castleType), castleType, null);
}
}
public static string GetCastlelingString(this ECastleling @this)
{
switch (@this)
{
case ECastleling.Short:
return("O-O");
case ECastleling.Long:
return("O-O-O");
case ECastleling.None:
return(string.Empty);
case ECastleling.CastleNb:
return(string.Empty);
default:
throw new ArgumentOutOfRangeException(nameof(@this), @this, null);
}
}
public static bool HasFlagFast(this ECastleling value, ECastleling flag) => (value & flag) != 0;
public void Hash(ECastleling castleling, ERank rank) => Value ^= Zobrist.GetZobristCastleling((int)rank);
