public PGNParser(TextReader reader)
{
tokenizer = new PGNTokenizer (reader, false);
}
/*
private static void loadTokensTillDelim(string delim, StringBuilder buf, PGNTokenizer tokenizer) {
string token;
while((token = tokenizer.nextToken()) != null) {
buf.Append(token);
if(token.Equals(delim))
return;
}
throw new PGNParserException();
}
*/
private static void readTagValuePair(IList
tagList,
PGNTokenizer
tokenizer)
{
string name, value;
if ((name = tokenizer.nextToken ()) == null)
throw new
PGNParserException
("Reached the end after starting a token begin!");
if (name.Equals ("]")) /* empty tag */
return;
StringBuilder value_buf =
new StringBuilder ();
while (true)
{
value = tokenizer.nextToken ();
if (value == null)
{
throw new
PGNParserException
("No more tokens but i'm trying to read the tag value");
}
if (value.Equals ("]"))
{
PGNTag tag =
new PGNTag (name,
extractTagValue
(value_buf.
ToString
()));
if (!tagList.
Contains (tag))
tagList.Add (tag);
break;
}
value_buf.Append (value);
}
}
private static string readComment(string begintoken,
PGNTokenizer
tokenizer)
{
string token = begintoken;
StringBuilder commentBuffer =
new StringBuilder ();
Stack stack = new Stack ();
string expected_token =
(string) matching_tokens[token];
stack.Push (token);
// commentBuffer.Append(token);
tokenizer.ReturnDelimiterAsToken = true;
while ((token =
tokenizer.nextToken ()) != null)
{
if (token.Equals ("\\"))
{
string nextToken =
tokenizer.
nextToken ();
if (nextToken == null)
throw new
PGNParserException
("Unable to find the next token after the escape char");
if (!isSpecialToken
(nextToken))
throw new
PGNParserException
("Invalid escape char: "
+
nextToken);
commentBuffer.
Append
(nextToken);
continue;
}
// if(token.Equals("{") || token.Equals("(") || token.Equals("[") || token.Equals("<")) {
if (token.Equals ("{")
|| token.Equals (begintoken))
{
stack.Push (token);
expected_token =
(string)
matching_tokens
[token];
if (commentBuffer.Length >
0)
{
// Another comment within a comment. Add one extra space to the comment buffer since
// we are not adding the delims
commentBuffer.
Append
(" ");
}
}
else if (token.
Equals (expected_token))
{
stack.Pop ();
if (stack.Count == 0)
break;
expected_token =
(string)
matching_tokens
[stack.Peek ()];
}
else if (token.Equals ("\""))
{
commentBuffer.
Append (token);
commentBuffer.
Append (readString
(token,
tokenizer));
commentBuffer.
Append (token);
}
else
commentBuffer.
Append (token);
}
if (token == null)
{
StringBuilder stackinfo =
new StringBuilder ();
foreach (string str in stack)
stackinfo.Append (str +
", ");
throw new
PGNParserException
("Waiting for delimiter tokens for: "
+ stackinfo);
}
tokenizer.ReturnDelimiterAsToken = false;
return commentBuffer.ToString ();
}
private static string readString(string token,
PGNTokenizer
tokenizer)
{
bool orig = tokenizer.ReturnDelimiterAsToken;
tokenizer.ReturnDelimiterAsToken = true;
StringBuilder buffer = new StringBuilder ();
while ((token =
tokenizer.nextToken ()) != null)
{
if (token.Equals ("\\"))
{ // escape char
string nextToken =
tokenizer.
nextToken ();
if (nextToken == null)
throw new
PGNParserException
("No character after \\");
if (!nextToken.
Equals ("\"")
&& !nextToken.
Equals ("\\"))
throw new
PGNParserException
("Invalid escape char: "
+
nextToken
[0]);
buffer.Append (nextToken);
}
else if (token.Equals ("\"")) // end of the string
break;
else
buffer.Append (token);
}
tokenizer.ReturnDelimiterAsToken = orig;
return buffer.ToString ();
}
// This type of a comment starts with ';' and goes on till the end of the line
private static string readLineComment(string token,
PGNTokenizer
tokenizer)
{
StringBuilder buffer = new StringBuilder ();
tokenizer.ReturnDelimiterAsToken = true;
while ((token =
tokenizer.nextToken ()) != null)
{
if (token.Equals ("\n"))
break;
buffer.Append (token);
}
tokenizer.ReturnDelimiterAsToken = false;
return buffer.ToString ();
}
private static void ignoreLine(string token,
PGNTokenizer
tokenizer)
{
tokenizer.ReturnDelimiterAsToken = true;
while ((token =
tokenizer.nextToken ()) != null)
{
if (token.Equals ("\n"))
break;
}
tokenizer.ReturnDelimiterAsToken = false;
}
