internal TokenInput(PreprocessorContext pp, TokenStream t)
: base(pp)
{
tokens = t;
}
internal void pushTokenStreamInput(TokenStream ts)
{
pushInput(new TokenInput(this, ts));
ts.Rewind();
}
///*
//* Read the next token from a token stream (not the source stream, but stream used to hold a tokenized macro).
//*/
internal int ReadToken(TokenStream pTok, PreprocessorToken ppToken)
{
char[] tokenText = buffer.tokenText;
int ltoken = 0;
int len = 0;
int ch;
ltoken = pTok.lReadByte();
ppToken.loc = parseContext.getCurrentLoc();
if (ltoken > 127)
ltoken += 128;
switch (ltoken)
{
case '#':
if (pTok.lReadByte() == '#') {
parseContext.requireProfile(ppToken.loc, ~Profile.EsProfile, "token pasting (##)");
parseContext.ProfileRequires(ppToken.loc, ~Profile.EsProfile, 130, null, "token pasting (##)");
parseContext.Error(ppToken.loc, "token pasting not implemented (internal error)", "##", "");
//return CPP_TOKEN_PASTE;
return ReadToken(pTok, ppToken);
} else
pTok.lUnreadByte();
break;
case (int) CppEnums.STRCONSTANT:
case (int) CppEnums.IDENTIFIER:
case (int) CppEnums.FLOATCONSTANT:
case (int) CppEnums.DOUBLECONSTANT:
case (int) CppEnums.INTCONSTANT:
case (int) CppEnums.UINTCONSTANT:
len = 0;
ch = pTok.lReadByte ();
while (ch != 0)
{
if (len < PreprocessorToken.maxTokenLength)
{
tokenText [len] = (char)ch;
len++;
ch = pTok.lReadByte();
} else
{
parseContext.Error (ppToken.loc, "token too long", "", "");
break;
}
}
break;
default:
break;
}
// DY RESTRUCTURED CODE
//tokenText[len] = 0;
string text = new string (tokenText, 0, len);
switch (ltoken)
{
case (int) CppEnums.IDENTIFIER:
case (int) CppEnums.STRCONSTANT:
ppToken.atom = Symbols.Atoms.LookUpAddString(text);
break;
case (int) CppEnums.FLOATCONSTANT:
case (int) CppEnums.DOUBLECONSTANT:
ppToken.name = text;
ppToken.dval = float.Parse(ppToken.name);
break;
case (int) CppEnums.INTCONSTANT:
case (int) CppEnums.UINTCONSTANT:
ppToken.name = text;
len = text.Length;
if (len > 0 && tokenText[0] == '0') {
if (len > 1 && (tokenText[1] == 'x' || tokenText[1] == 'X'))
ppToken.ival = Convert.ToInt32(ppToken.name, 16);
else
ppToken.ival = Convert.ToInt32(ppToken.name, 8);
} else
ppToken.ival = int.Parse(ppToken.name);
break;
default:
break;
}
return ltoken;
}
internal TokenStream PrescanMacroArg(TokenStream a, PreprocessorToken ppToken, bool newLineOkay)
{
int token;
a.Rewind();
do {
token = ReadToken(a, ppToken);
if (token == (int) CppEnums.IDENTIFIER && Symbols.LookUp(ppToken.atom) != null)
break;
} while (token != BasePreprocessorInput.END_OF_INPUT);
if (token == BasePreprocessorInput.END_OF_INPUT)
return a;
TokenStream n = new TokenStream ();
pushInput(new MarkerInput(this));
pushTokenStreamInput(a);
while ((token = scanToken(ref ppToken)) != MarkerInput.marker) {
if (token == (int) CppEnums.IDENTIFIER && MacroExpand(ppToken.atom, ppToken, false, newLineOkay) != 0)
continue;
Symbols.Atoms.RecordToken(n, token, ppToken);
}
popInput();
return n;
}
