public static Property ReadProperty(ReadFile input)
{
string lName = string.Empty;
string lValue = string.Empty;
while (!input.EOF)
{
char c = input.Get();
if (Char.IsLetter(c))
lName = lName + c.ToString();
if (c == '[')
{
lValue = ReadPropertyValue(input);
return new Property(lName, lValue);
}
}
return null;
}
public static string ReadPropertyValue(ReadFile input)
{
string lValue = string.Empty;
bool lEscaped = false;
while (!input.EOF)
{
char c = input.Get();
if ((c == ']') && (!lEscaped))
return lValue;
lValue = lValue + c.ToString();
if (lEscaped)
lEscaped = false;
else
if (c == EscapeCharacter)
lEscaped = true;
}
return lValue;
}
public static SGFTokens Tokenize(ReadFile input)
{
SGFTokens lTokens = new SGFTokens();
if (!input.IsOk())
{
lTokens.SetErrorMessage(input.GetErrorMessage());
return lTokens;
}
while (!input.EOF)
{
char c = input.Peek();
if (Char.IsLetter(c))
{
Property lProperty = ReadProperty(input);
if (lProperty == null)
{
lTokens.SetErrorMessage("ERROR: unable to parse sgf file");
return lTokens;
}
lTokens.Add(new SGFToken(lProperty));
}
else
{
input.Get(); // read past the character
if (c == '[')
{
lTokens.RemovePreviousWhitespace();
SGFToken lSGFToken = lTokens.LastToken();
if ((lSGFToken == null) || (lSGFToken.Type != TokenType.PROPERTY))
{
lTokens.SetErrorMessage("ERROR: unable to parse sgf file");
return lTokens;
}
string lValue = ReadPropertyValue(input);
lSGFToken.Property.AdditionalValues.Add(lValue);
}
else if (c == '(')
lTokens.Add(new SGFToken(TokenType.OPENPARAN));
else if (c == ')')
lTokens.Add(new SGFToken(TokenType.CLOSEPARAN));
else if (c == ';')
lTokens.Add(new SGFToken(TokenType.SEMICOMMA));
else
if (WhitespaceCharacters.IndexOf(c) >= 0)
lTokens.AddWhitespace(c.ToString());
}
}
return lTokens;
}