//not handling function-like macros yet
public void invokeMacro(Macro macro)
{
//Macro.setCurrentMacro(macro, null);
}
public static void initMacros()
{
macroTable = new Dictionary <string, Macro>();
macroList = new List <Macro>();
curMacro = null;
}
//- pp token stream handling ------------------------------------------
//handles macro expansion & eof in include files
//handle directives in the scanner's fragment stream, will be sent to tokenizer as EOLN fragments
public PPToken getPPToken()
{
PPToken tok = null;
while (true)
{
tok = source.getPPToken();
//Console.WriteLine("pp token = " + tok.ToString());
//check for directive as first non-space frag at start of line
if (atLineStart)
{
if ((tok.type == PPTokenType.PUNCT) && (tok.str[0] == '#'))
{
handleDirective();
tok = new PPToken(PPTokenType.EOLN, "<eoln>"); //cur pp token will be left as the EOLN at end of directive line
}
else
{
atLineStart = (tok.type == PPTokenType.SPACE || tok.type == PPTokenType.COMMENT);
}
}
if ((tok.type == PPTokenType.EOLN) || (tok.type == PPTokenType.EOF))
{
atLineStart = true;
}
//check for a macro if not skipping tokens
if (tok.type == PPTokenType.WORD && !skippingTokens)
{
Macro macro = Macro.lookupMacro(tok.str);
if (macro != null)
{
//invokeMacro(macro); //start macro running
continue; //and loop around to get first macro token (if not empty)
}
}
//check if we've hit the end of macro. if this is a macro, pull it off the stack
//and resume scanning at the point we stopped in the previous source
//note: check for macro end first because a file can contain a macro, but a macro can't include a file
if ((tok.type == PPTokenType.EOF) && (macroStack.Count > 0))
{
macroStack.RemoveAt(macroStack.Count - 1);
if (macroStack.Count > 0)
{
source = macroStack[macroStack.Count - 1];
}
else
{
source = sourceStack[sourceStack.Count - 1];
}
continue; //get next token from including source
}
//check if we've hit the end of file. if this is an include file, pull it off the stack
//and resume scanning at the point we stopped in the including file
//we return the EOF token from the main file only
if ((tok.type == PPTokenType.EOF) && (sourceStack.Count > 1))
{
//Console.WriteLine("closing include file " + sourceStack[sourceStack.Count - 1].filename);
sourceStack.RemoveAt(sourceStack.Count - 1);
source = sourceStack[sourceStack.Count - 1];
continue; //get next token from including source if not at main file
}
if (!skippingTokens)
{
break;
}
}
return(tok);
}
