/// <summary>
/// Constructor the initializes our parser.
/// </summary>
public PGNReader()
{
_Regex = new Regex("^\\[([A-Za-z]*) \"(.*)\"", RegexOptions.Compiled);
_Value = new StringBuilder();
_State = Enums.PGNReaderState.Header;
_SaveState = new Stack();
_PeriodCount = 0;
}
/// <summary>
/// Constructor the initializes our parser.
/// </summary>
public PGNReader()
{
_Regex = new Regex("^\\[([A-Za-z]*) \"(.*)\"", RegexOptions.Compiled);
_Value = new StringBuilder();
_State = Enums.PGNReaderState.Header;
_SaveState = new Stack();
_PeriodCount = 0;
}
/// <summary>
/// Calls the correct event based on the parsers state.
/// </summary>
/// <param name="state"></param>
private void CallEvent(Enums.PGNReaderState state)
{
if (_Value.Length > 0)
{
switch (state)
{
case Enums.PGNReaderState.Comment:
if (EventCommentParsed != null)
{
EventCommentParsed(this);
}
State = _PrevState;
break;
case Enums.PGNReaderState.Nags:
if (EventNagParsed != null)
{
EventNagParsed(this);
}
State = _PrevState;
break;
case Enums.PGNReaderState.ConvertNag:
string nag = _Value.ToString();
_Value.Length = 0;
if (nag.Equals("!"))
{
_Value.Append('1');
}
else if (nag.Equals("?"))
{
_Value.Append('2');
}
else if (nag.Equals("!!"))
{
_Value.Append('3');
}
else if (nag.Equals("??"))
{
_Value.Append('4');
}
else if (nag.Equals("!?"))
{
_Value.Append('5');
}
else if (nag.Equals("?!"))
{
_Value.Append('6');
}
else
{
_Value.Append('0');
}
if (EventNagParsed != null)
{
EventNagParsed(this);
}
State = _PrevState;
break;
case Enums.PGNReaderState.Number:
if (EventMoveParsed != null)
{
EventMoveParsed(this);
}
State = Enums.PGNReaderState.Color;
break;
case Enums.PGNReaderState.White:
if (EventMoveParsed != null)
{
EventMoveParsed(this);
}
State = Enums.PGNReaderState.Black;
break;
case Enums.PGNReaderState.Black:
if (EventMoveParsed != null)
{
EventMoveParsed(this);
}
State = Enums.PGNReaderState.Number;
break;
case Enums.PGNReaderState.EndMarker:
if (EventendMarkerParsed != null)
{
EventendMarkerParsed(this);
}
State = Enums.PGNReaderState.Header;
break;
}
}
// Always clear out our data as the handler should have used this value during the event.
_Value.Length = 0;
}
/// <summary>
/// Handles individual charaters which may signal a change in the
/// parser's state.
/// </summary>
/// <param name="aChar"></param>
private void HandleChar(char aChar)
{
switch (aChar)
{
case '{':
CallEvent(State);
_PrevState = State;
State = Enums.PGNReaderState.Comment;
break;
case '(':
if (EventEnterVariation != null)
{
EventEnterVariation(this);
}
_Value.Length = 0;
_SaveState.Push(State);
break;
case ')':
if (EventExitVariation != null)
{
EventExitVariation(this);
}
_Value.Length = 0;
State = (Enums.PGNReaderState)_SaveState.Pop();
break;
case ' ':
// Only if we have some data do we want to fire an event.
CallEvent(State);
break;
case '.':
// We may have come across 6. e4 6... d5 as in our example data.
State = Enums.PGNReaderState.Number;
CallEvent(State);
_PeriodCount = 1;
break;
case '$':
CallEvent(State);
_PrevState = State;
State = Enums.PGNReaderState.Nags;
break;
case '!':
case '?':
if (State != Enums.PGNReaderState.ConvertNag)
{
CallEvent(State);
_PrevState = State;
State = Enums.PGNReaderState.ConvertNag;
}
_Value.Append(aChar);
break;
case '-':
if (State != Enums.PGNReaderState.EndMarker && _Value.Length >= 1)
{
if ("012".IndexOf(_Value[_Value.Length - 1]) >= 0)
{
State = Enums.PGNReaderState.EndMarker;
}
}
_Value.Append(aChar);
break;
case '*':
State = Enums.PGNReaderState.EndMarker;
_Value.Append(aChar);
break;
case '\t':
break;
default:
_Value.Append(aChar);
break;
}
}
/// <summary>
/// Handles the parsing of the actual game notation of the PGN file.
/// </summary>
/// <param name="line"></param>
public void ParseDetail(string line)
{
foreach (char aChar in line)
{
// Handle any special processing of our text.
switch (_State)
{
case Enums.PGNReaderState.Comment:
if (aChar == '}')
{
CallEvent(_State);
}
else
{
_Value.Append(aChar);
}
break;
case Enums.PGNReaderState.Nags:
if (aChar >= '0' && aChar <= '9')
{
_Value.Append(aChar);
}
else
{
CallEvent(_State);
HandleChar(aChar);
}
break;
case Enums.PGNReaderState.Color:
if (aChar == '.')
{
_PeriodCount++;
}
else
{
_Value.Length = 0;
if (_PeriodCount == 1)
{
_State = Enums.PGNReaderState.White;
}
else if (_PeriodCount > 1)
{
_State = Enums.PGNReaderState.Black;
}
HandleChar(aChar);
_PeriodCount = 0;
}
break;
default:
HandleChar(aChar);
break;
}
}
// Ensure we add a space between comment lines that are broken appart.
if (_State == Enums.PGNReaderState.Comment)
{
_Value.Append(' ');
}
else
{
CallEvent(_State);
}
}
/// <summary>
/// Responsible for the main driver loop of the parser. Here we read
/// in the PGN file and produce events for the listening parties.
/// </summary>
public void Parse()
{
StringBuilder builder = new StringBuilder(1024);
StreamReader reader = null;
if (EventStarting != null)
{
EventStarting(this);
}
try
{
Encoding fileEncoding = TextFileEncoding.GetEncoding(_filename);
reader = new StreamReader(_filename, fileEncoding);
while (!reader.EndOfStream)
{
#region while
char aChar = (char)reader.Read();
switch (aChar)
{
#region case
case '\n':
_Data = builder.ToString();
builder.Length = 0;
if (_Data.Length > 0)
{
if (_State != Enums.PGNReaderState.Comment && Regex.IsMatch(_Data, "^\\["))
{
if (_NextGame == false)
{
CallEvent(_State);
_NextGame = true;
if (EventNewGame != null)
{
EventNewGame(this);
}
}
_State = Enums.PGNReaderState.Header;
ParseTag(_Data);
_Value.Length = 0;
}
else
{
if (_NextGame)
{
_NextGame = false;
if (EventExitHeader != null)
{
EventExitHeader(this);
}
}
ParseDetail(_Data);
}
}
break;
case '\r':
break;
default:
builder.Append(aChar);
if (reader.EndOfStream)
{
goto case '\n';
}
break;
#endregion
}
#endregion
}//while
CallEvent(_State);
}
catch (ApplicationException)
{
throw;
}
finally
{
if (reader != null)
{
reader.Close();
reader = null;
}
}
if (EventFinished != null)
{
EventFinished(this);
}
}
/// <summary>
/// Handles individual charaters which may signal a change in the
/// parser's state.
/// </summary>
/// <param name="aChar"></param>
private void HandleChar(char aChar)
{
switch (aChar)
{
case '{':
CallEvent(_State);
_PrevState = _State;
_State = Enums.PGNReaderState.Comment;
break;
case '(':
if (EventEnterVariation != null)
EventEnterVariation(this);
_Value.Length = 0;
_SaveState.Push(_State);
break;
case ')':
if (EventExitVariation != null)
EventExitVariation(this);
_Value.Length = 0;
_State = (Enums.PGNReaderState)_SaveState.Pop();
break;
case ' ':
// Only if we have some data do we want to fire an event.
CallEvent(_State);
break;
case '.':
// We may have come across 6. e4 6... d5 as in our example data.
_State = Enums.PGNReaderState.Number;
CallEvent(_State);
_PeriodCount = 1;
break;
case '$':
CallEvent(_State);
_PrevState = _State;
_State = Enums.PGNReaderState.Nags;
break;
case '!':
case '?':
if (_State != Enums.PGNReaderState.ConvertNag)
{
CallEvent(_State);
_PrevState = _State;
_State = Enums.PGNReaderState.ConvertNag;
}
_Value.Append(aChar);
break;
case '-':
if (_State != Enums.PGNReaderState.EndMarker && _Value.Length >= 1)
{
if ("012".IndexOf(_Value[_Value.Length - 1]) >= 0)
_State = Enums.PGNReaderState.EndMarker;
}
_Value.Append(aChar);
break;
case '*':
_State = Enums.PGNReaderState.EndMarker;
_Value.Append(aChar);
break;
case '\t':
break;
default:
_Value.Append(aChar);
break;
}
}
/// <summary>
/// Calls the correct event based on the parsers state.
/// </summary>
/// <param name="state"></param>
private void CallEvent(Enums.PGNReaderState state)
{
if (_Value.Length > 0)
{
switch (state)
{
case Enums.PGNReaderState.Comment:
if (EventCommentParsed != null)
EventCommentParsed(this);
_State = _PrevState;
break;
case Enums.PGNReaderState.Nags:
if (EventNagParsed != null)
EventNagParsed(this);
_State = _PrevState;
break;
case Enums.PGNReaderState.ConvertNag:
string nag = _Value.ToString();
_Value.Length = 0;
if (nag.Equals("!"))
_Value.Append('1');
else if (nag.Equals("?"))
_Value.Append('2');
else if (nag.Equals("!!"))
_Value.Append('3');
else if (nag.Equals("??"))
_Value.Append('4');
else if (nag.Equals("!?"))
_Value.Append('5');
else if (nag.Equals("?!"))
_Value.Append('6');
else
_Value.Append('0');
if (EventNagParsed != null)
EventNagParsed(this);
_State = _PrevState;
break;
case Enums.PGNReaderState.Number:
if (EventMoveParsed != null)
EventMoveParsed(this);
_State = Enums.PGNReaderState.Color;
break;
case Enums.PGNReaderState.White:
if (EventMoveParsed != null)
EventMoveParsed(this);
_State = Enums.PGNReaderState.Black;
break;
case Enums.PGNReaderState.Black:
if (EventMoveParsed != null)
EventMoveParsed(this);
_State = Enums.PGNReaderState.Number;
break;
case Enums.PGNReaderState.EndMarker:
if (EventendMarkerParsed != null)
EventendMarkerParsed(this);
_State = Enums.PGNReaderState.Header;
break;
}
}
// Always clear out our data as the handler should have used this value during the event.
_Value.Length = 0;
}
/// <summary>
/// Handles the parsing of the actual game notation of the PGN file.
/// </summary>
/// <param name="line"></param>
public void ParseDetail(string line)
{
foreach (char aChar in line)
{
// Handle any special processing of our text.
switch (_State)
{
case Enums.PGNReaderState.Comment:
if (aChar == '}')
{
CallEvent(_State);
}
else
_Value.Append(aChar);
break;
case Enums.PGNReaderState.Nags:
if (aChar >= '0' && aChar <= '9')
_Value.Append(aChar);
else
{
CallEvent(_State);
HandleChar(aChar);
}
break;
case Enums.PGNReaderState.Color:
if (aChar == '.')
{
_PeriodCount++;
}
else
{
_Value.Length = 0;
if (_PeriodCount == 1)
{
_State = Enums.PGNReaderState.White;
}
else if (_PeriodCount > 1)
{
_State = Enums.PGNReaderState.Black;
}
HandleChar(aChar);
_PeriodCount = 0;
}
break;
default:
HandleChar(aChar);
break;
}
}
// Ensure we add a space between comment lines that are broken appart.
if (_State == Enums.PGNReaderState.Comment)
_Value.Append(' ');
else
CallEvent(_State);
}
/// <summary>
/// Responsible for the main driver loop of the parser. Here we read
/// in the PGN file and produce events for the listening parties.
/// </summary>
public void Parse()
{
StringBuilder builder = new StringBuilder(1024);
StreamReader reader = null;
if (EventStarting != null)
EventStarting(this);
try
{
Encoding fileEncoding = TextFileEncoding.GetEncoding(_filename);
reader = new StreamReader(_filename, fileEncoding);
while (!reader.EndOfStream)
{
#region while
char aChar = (char)reader.Read();
switch (aChar)
{
#region case
case '\n':
_Data = builder.ToString();
builder.Length = 0;
if (_Data.Length > 0)
{
if (_State != Enums.PGNReaderState.Comment && Regex.IsMatch(_Data, "^\\["))
{
if (_NextGame == false)
{
CallEvent(_State);
_NextGame = true;
if (EventNewGame != null)
{
EventNewGame(this);
}
}
_State = Enums.PGNReaderState.Header;
ParseTag(_Data);
_Value.Length = 0;
}
else
{
if (_NextGame)
{
_NextGame = false;
if (EventExitHeader != null)
{
EventExitHeader(this);
}
}
ParseDetail(_Data);
}
}
break;
case '\r':
break;
default:
builder.Append(aChar);
if (reader.EndOfStream)
{
goto case '\n';
}
break;
#endregion
}
#endregion
}//while
CallEvent(_State);
}
catch (ApplicationException)
{
throw;
}
finally
{
if (reader != null)
{
reader.Close();
reader = null;
}
}
if (EventFinished != null)
EventFinished(this);
}
