/// <summary>
/// Processes a specified position command,
/// with the side effect of resetting the curPositionAndMoves.
/// </summary>
/// <param name="command"></param>
private void ProcessPosition(string command)
{
command = StringUtils.WhitespaceRemoved(command);
string commandLower = command.ToLower();
string posString;
if (commandLower.StartsWith("position fen "))
{
posString = command.Substring(13);
}
else if (commandLower.StartsWith("position startpos"))
{
posString = command.Substring(9);
}
else
{
throw new Exception($"Illegal position command, expected to start with position fen or position startpos");
}
PositionWithHistory newPositionAndMoves = PositionWithHistory.FromFENAndMovesUCI(posString);
curPositionIsContinuationOfPrior = newPositionAndMoves.IsIdenticalToPriorToLastMove(curPositionAndMoves);
if (!curPositionIsContinuationOfPrior && CeresEngine != null)
{
CeresEngine.ResetGame();
}
// Switch to the new position and moves
curPositionAndMoves = newPositionAndMoves;
}
/// <summary>
/// Processes a specified position command,
/// with the side effect of resetting the curPositionAndMoves.
/// </summary>
/// <param name="command"></param>
private void ProcessPosition(string command)
{
string[] parts = command.Split(" ");
string fen;
int nextIndex;
string startFEN;
switch (parts[1])
{
case "fen":
fen = command.Substring(command.IndexOf("fen") + 4);
nextIndex = 2;
while (parts.Length > nextIndex && parts[nextIndex] != "moves")
{
fen = fen + " " + parts[nextIndex++];
}
startFEN = fen;
break;
case "startpos":
startFEN = Position.StartPosition.FEN;
nextIndex = 2;
break;
default:
throw new Exception("invalid " + command);
}
string movesSubstring = "";
if (parts.Length > nextIndex && parts[nextIndex] == "moves")
{
for (int i = nextIndex + 1; i < parts.Length; i++)
{
movesSubstring += parts[i] + " ";
}
}
PositionWithHistory newPositionAndMoves = PositionWithHistory.FromFENAndMovesUCI(startFEN, movesSubstring);
curPositionIsContinuationOfPrior = newPositionAndMoves.IsIdenticalToPriorToLastMove(curPositionAndMoves);
if (!curPositionIsContinuationOfPrior && CeresEngine != null)
{
CeresEngine.ResetGame();
}
// Switch to the new position and moves
curPositionAndMoves = newPositionAndMoves;
}