public PgnData()
{
coRegex = new Regex("^\\[([A-Za-z]*) \"(.*)\"", RegexOptions.Compiled);
coValue = new System.Text.StringBuilder();
coState = GameParserState.State.HEADER;
coPeriodCount = 0;
}
/// <summary>
/// Calls the correct event based on the parsers state.
/// </summary>
/// <param name="state"></param>
void callEvent(GameParserState.State state)
{
if (coValue.Length > 0)
{
switch (state)
{
case GameParserState.State.COMMENT:
if (EventCommentParsed != null)
{
EventCommentParsed(this);
}
break;
case GameParserState.State.NAGS:
if (EventNagParsed != null)
{
EventNagParsed(this);
}
break;
case GameParserState.State.NUMBER:
if (EventMoveParsed != null)
{
EventMoveParsed(this);
}
coState = GameParserState.State.COLOR;
break;
case GameParserState.State.WHITE:
if (EventMoveParsed != null)
{
EventMoveParsed(this);
}
coState = GameParserState.State.BLACK;
break;
case GameParserState.State.BLACK:
if (EventMoveParsed != null)
{
EventMoveParsed(this);
}
coState = GameParserState.State.NUMBER;
break;
}
}
// Always clear out our data as the handler should have used this value during the event.
coValue.Length = 0;
}
void handleChar(char aChar)
{
switch (aChar)
{
case '{':
callEvent(coState);
coPrevState = coState;
coState = GameParserState.State.COMMENT;
break;
case '(':
if (EventEnterVariation != null)
{
EventEnterVariation(this);
}
break;
case ')':
if (EventExitVariation != null)
{
EventExitVariation(this);
}
break;
case ' ':
// Only if we have some data do we want to fire an event.
callEvent(coState);
break;
case '.':
// We may have come across 6. e4 6... d5 as in our example data.
coState = GameParserState.State.NUMBER;
callEvent(coState);
coPeriodCount = 1;
break;
case '$':
callEvent(coState);
coPrevState = coState;
coState = GameParserState.State.NAGS;
break;
default:
coValue.Append(aChar);
break;
}
}
public void parse()
{
System.IO.StreamReader reader = new System.IO.StreamReader(coFilename);
long position = 0;
for (coData = reader.ReadLine();
coData != null;
coData = reader.ReadLine())
{
if (coData.Length > 0)
{
if (Regex.IsMatch(coData, "^\\["))
{
if (coNextGame == false)
{
callEvent(coState);
coNextGame = true;
if (EventNewGame != null)
{
EventNewGame(this);
}
}
coState = GameParserState.State.HEADER;
parseTag(coData);
coValue.Length = 0;
}
else
{
if (coNextGame)
{
coNextGame = false;
}
parseDetail(coData);
}
position += coData.Length + 2;
}
}
callEvent(coState);
reader.Close();
if (EventFinished != null)
{
EventFinished(this);
}
}
public void parseDetail(string line)
{
foreach (char aChar in line)
{
// Handle any special processing of our text.
switch (coState)
{
case GameParserState.State.COMMENT:
if (aChar == '}')
{
callEvent(coState);
coState = coPrevState;
}
else
{
coValue.Append(aChar);
}
break;
case GameParserState.State.NAGS:
if (aChar >= '0' && aChar <= '9')
{
coValue.Append(aChar);
}
else
{
callEvent(coState);
coState = coPrevState;
handleChar(aChar);
}
break;
case GameParserState.State.COLOR:
if (aChar == '.')
{
coPeriodCount++;
}
else
{
coValue.Length = 0;
if (coPeriodCount == 1)
{
coState = GameParserState.State.WHITE;
}
else if (coPeriodCount > 1)
{
coState = GameParserState.State.BLACK;
}
handleChar(aChar);
coPeriodCount = 0;
}
break;
default:
handleChar(aChar);
break;
}
}
// Ensure we add a space between comment lines that are broken appart.
if (coState == GameParserState.State.COMMENT)
{
coValue.Append(' ');
}
else
{
callEvent(coState);
}
}
