protected override PgnParseResult DoParse(char current, char next, PgnGame currentGame)
{
_current = currentGame;
_stateBuffer.Add(current);
return(PgnParseResult.None);
}
internal PgnParseResult Parse(char current, char next, PgnGame currentGame)
{
var result = _currentState.Parse(current, next, currentGame);
if (result == PgnParseResult.EndOfGame)
{
_currentState.ChangeState(_initState);
}
return(result);
}
protected override PgnParseResult DoParse(char current, char next, PgnGame currentGame)
{
_stateBuffer.Add(current);
if (next == PgnToken.RecursiveVariationEnd.Token)
{
OnExit();
var latest = _history.Pop();
_statemachine.SetState(latest);
}
return(PgnParseResult.None);
}
public virtual PgnParseResult Parse(char current, char next, PgnGame currentGame)
{
if (TryTransite(current, currentGame))
{
return(PgnParseResult.None);
}
if (TryExit(current, currentGame))
{
return(PgnParseResult.None);
}
return(DoParse(current, next, currentGame));
}
private void Terminate(string result, PgnGame currentGame)
{
CheckToFinishMove();
if (!string.IsNullOrWhiteSpace(_currentMove.Move))
{
currentGame.AddMove(_currentMove);
}
currentGame.Result = result;
_stateBuffer.Clear();
_currentMove = new PgnMove();
}
/// <summary>
/// Reads one game from the pgn file.
/// </summary>
/// <returns><c>true</c>, if there are more records, otherwise <c>false</c>.</returns>
public bool ReadGame()
{
CheckIfDisposed();
try
{
CurrentGame = InternalReadGame();
}
catch (Exception ex)
{
throw new PgnReaderException(string.Format("A parsing error occurred."), ex);
}
return(CurrentGame != null);
}
protected bool TryExit(char current, PgnGame game)
{
foreach (var item in _exits)
{
if (item.Item1(current))
{
OnExit();
_history.Pop();
_statemachine.SetState(item.Item2());
return(true);
}
}
return(false);
}
protected bool TryTransite(char current, PgnGame game)
{
foreach (var item in _transitions)
{
if (item.Item1(current))
{
ChangeState(item.Item2(), _currentMove);
_history.Push(item.Item2());
if (item.Item3 != null)
{
item.Item3(game);
}
return(true);
}
}
return(false);
}
private PgnGame InternalReadGame()
{
var currentGame = new PgnGame();
var currentCharPos = 0;
while (true)
{
currentCharPos++;
if (_readerBufferPosition == _charsRead)
{
if (!TryReadNextBlock())
{
_statemachine.Parse('\0', '\0', currentGame);
if (currentGame.Moves.Count == 0)
{
return(null);
}
_games.Add(currentGame);
return(currentGame);
}
}
if (_currentChar == null)
{
_currentChar = _readerBuffer[_readerBufferPosition];
_readerBufferPosition++;
}
_nextChar = _readerBuffer[_readerBufferPosition];
_readerBufferPosition++;
if (_statemachine.Parse(_currentChar.Value, _nextChar, currentGame) == PgnParseResult.EndOfGame)
{
_games.Add(currentGame);
_currentChar = _nextChar;
return(currentGame);
}
_currentChar = _nextChar;
}
}
protected override PgnParseResult DoParse(char current, char next, PgnGame currentGame)
{
if (char.IsWhiteSpace(current) && char.IsWhiteSpace(next))
{
//remove double whitespaces
}
else if (char.IsWhiteSpace(current))
{
CheckToFinishMove();
}
else if (current == '\r')
{
//remove linebreaks
}
else if (current == '-' ||
current == '+' ||
current == '#')
{
_stateBuffer.Add(current);
}
else if (char.IsLetterOrDigit(current))
{
if (!string.IsNullOrWhiteSpace(_currentMove.Move))
{
_stateBuffer.Clear();
_currentMove = new PgnMove();
}
_stateBuffer.Add(current);
}
else if (current == PgnToken.Period.Token)
{
_stateBuffer.Clear();
}
else
{
_stateBuffer.Add(current);
//throw new PgnReaderException("RecursiveVariationState: no idea how to handle: " + current);
}
return(PgnParseResult.None);
}
protected abstract PgnParseResult DoParse(char current, char next, PgnGame currentGame);
protected override PgnParseResult DoParse(char current, char next, PgnGame currentGame)
{
if (_skipCharsTilEofGame > 0)
{
--_skipCharsTilEofGame;
return(_skipCharsTilEofGame == 0 ? PgnParseResult.EndOfGame : PgnParseResult.None);
}
if (current == '1' && next == '/')
{
Terminate("1/2-1/2" + "", currentGame);
_skipCharsTilEofGame = 6;
return(PgnParseResult.None);
}
else if (current == '1' && next == '-')
{
Terminate("1-0", currentGame);
_skipCharsTilEofGame = 2;
return(PgnParseResult.None);
}
else if (current == '0' && next == '-')
{
Terminate("0-1", currentGame);
_skipCharsTilEofGame = 2;
return(PgnParseResult.None);
}
else if (char.IsLetterOrDigit(current))
{
if (!string.IsNullOrWhiteSpace(_currentMove.Move))
{
currentGame.AddMove(_currentMove);
_stateBuffer.Clear();
_currentMove = new PgnMove();
}
_stateBuffer.Add(current);
}
else if (current == PgnToken.Period.Token)
{
_stateBuffer.Clear();
}
else if (current == PgnToken.Asterisk.Token)
{
Terminate(current + "", currentGame);
return(PgnParseResult.EndOfGame);
}
else if (current == PgnToken.TagBegin.Token || current == '\0')
{
string gameResult = string.Empty;
string termination = new string(_stateBuffer.ToArray()).Trim();
foreach (var result in PgnReader.Results)
{
if (termination.EndsWith(result))
{
gameResult = result;
}
}
if (string.IsNullOrEmpty(gameResult))
{
CheckToFinishMove();
Terminate("*", currentGame);
}
else
{
Terminate(gameResult, currentGame);
}
return(PgnParseResult.EndOfGame);
}
else if (char.IsWhiteSpace(current) && char.IsWhiteSpace(next))
{
//remove double whitespaces
}
else if (char.IsWhiteSpace(current))
{
CheckToFinishMove();
if (next == PgnToken.TagBegin.Token)
{
if (!string.IsNullOrWhiteSpace(_currentMove.Move))
{
currentGame.AddMove(_currentMove);
}
return(PgnParseResult.EndOfGame);
}
}
else if (current == '\r')
{
//remove linebreaks
}
else if (current == '-' ||
current == '+' ||
current == '#')
{
_stateBuffer.Add(current);
}
else
{
_stateBuffer.Add(current);
//throw new PgnReaderException("MovesSectionState: no idea how to handle: " + current);
}
return(PgnParseResult.None);
}
internal void InitGame(PgnGame game)
{
_stateBuffer.Clear();
_currentMove = new PgnMove();
}