private BitSet getParamUsage(PreprocessorMacro macro) {
final BitSet result = new BitSet();
final TokenList replacement = macro.getTokens(fDefinitionParser, fLexOptions, this);
Token l = null;
Token n;
for (Token t = replacement.first(); t != null; l = t, t = n) {
n = (Token) t.getNext();
switch (t.getType()) {
case ObjCPreprocessor.tMACRO_PARAMETER:
int idx = 2 * ((TokenParameterReference) t).getIndex();
if (!isKind(n, IToken.tPOUNDPOUND)) {
idx++;
}
result.set(idx);
break;
case IToken.tPOUND:
if (isKind(n, ObjCPreprocessor.tMACRO_PARAMETER)) {
idx = ((TokenParameterReference) n).getIndex();
result.set(2 * idx);
t = n;
n = (Token) n.getNext();
}
break;
case IToken.tPOUNDPOUND:
if (isKind(n, ObjCPreprocessor.tMACRO_PARAMETER)) {
idx = ((TokenParameterReference) n).getIndex();
// gcc-extension
if (isKind(l, IToken.tCOMMA)
&& macro.hasVarArgs() != FunctionStyleMacro.NO_VAARGS
&& idx == macro.getParameterPlaceholderList().length - 1
&& !isKind(n.getNext(), IToken.tPOUNDPOUND)) {
result.set(2 * idx + 1);
} else {
result.set(2 * idx);
}
t = n;
n = (Token) n.getNext();
}
break;
}
}
return result;
}
private void replaceArgs(
PreprocessorMacro macro, TokenList[] args, TokenList[] expandedArgs, TokenList result) {
TokenList replacement = clone(macro.getTokens(fDefinitionParser, fLexOptions, this));
Token l = null;
Token n;
Token pasteArg1 = null;
for (Token t = replacement.first(); t != null; l = t, t = n) {
n = (Token) t.getNext();
switch (t.getType()) {
case ObjCPreprocessor.tMACRO_PARAMETER:
int idx = ((TokenParameterReference) t).getIndex();
if (idx < args.length) { // be defensive
addSpacemarker(l, t, result); // start argument
// replacement
if (isKind(n, IToken.tPOUNDPOUND)) {
TokenList arg = clone(args[idx]);
pasteArg1 = arg.last();
if (pasteArg1 != null) {
result.appendAllButLast(arg);
addSpacemarker(result.last(), pasteArg1, result); // start
// token
// paste
}
} else {
TokenList arg = clone(expandedArgs[idx]);
result.appendAll(arg);
addSpacemarker(t, n, result); // end argument
// replacement
}
}
break;
case IToken.tPOUND:
addSpacemarker(l, t, result); // start stringify
StringBuilder buf = new StringBuilder();
buf.append('"');
if (isKind(n, ObjCPreprocessor.tMACRO_PARAMETER)) {
idx = ((TokenParameterReference) n).getIndex();
if (idx < args.length) { // be defensive
stringify(args[idx], buf);
}
t = n;
n = (Token) n.getNext();
}
buf.append('"');
final int length = buf.length();
final char[] image = new char[length];
buf.getChars(0, length, image, 0);
Token generated = new TokenWithImage(IToken.tSTRING, null, 0, 0, image);
if (isKind(n, IToken.tPOUNDPOUND)) { // start token paste,
// same as start
// stringify
pasteArg1 = generated;
} else {
result.append(generated);
addSpacemarker(t, n, result); // end stringify
}
break;
case IToken.tPOUNDPOUND:
Token pasteArg2 = null;
TokenList rest = null;
if (n != null) {
if (n.getType() == ObjCPreprocessor.tMACRO_PARAMETER) {
TokenList arg;
idx = ((TokenParameterReference) n).getIndex();
if (idx < args.length) { // be defensive
arg = clone(args[idx]);
pasteArg2 = arg.first();
if (pasteArg2 != null && arg.first() != arg.last()) {
rest = arg;
rest.removeFirst();
}
}
} else {
idx = -1;
pasteArg2 = n;
}
t = n;
n = (Token) n.getNext();
final boolean pasteNext = isKind(n, IToken.tPOUNDPOUND);
generated = tokenpaste(pasteArg1, pasteArg2, macro);
pasteArg1 = null;
if (generated != null) {
if (pasteNext && rest == null) {
pasteArg1 = generated; // no need to mark
// spaces, done ahead
} else {
result.append(generated);
addSpacemarker(pasteArg2, rest == null ? n : rest.first(), result); // end
// token
// paste
}
}
if (rest != null) {
if (pasteNext) {
pasteArg1 = rest.last();
if (pasteArg1 != null) {
result.appendAllButLast(rest);
addSpacemarker(result.last(), pasteArg1, result); // start
// token
// paste
}
} else {
result.appendAll(rest);
if (idx >= 0) {
addSpacemarker(t, n, result); // end
// argument
// replacement
}
}
}
}
break;
case IToken.tCOMMA:
if (isKind(n, IToken.tPOUNDPOUND)) {
final Token nn = (Token) n.getNext();
if (isKind(nn, ObjCPreprocessor.tMACRO_PARAMETER)) {
idx = ((TokenParameterReference) nn).getIndex();
// check for gcc-extension preventing the paste
// operation
if (idx == args.length - 1
&& macro.hasVarArgs() != FunctionStyleMacro.NO_VAARGS
&& !isKind(nn.getNext(), IToken.tPOUNDPOUND)) {
final Token nnn = (Token) nn.getNext();
TokenList arg = clone(expandedArgs[idx]);
if (arg.isEmpty()) {
addSpacemarker(l, t, result);
addSpacemarker(nn, nnn, result);
} else {
result.append(t);
addSpacemarker(t, n, result);
result.appendAll(arg);
addSpacemarker(nn, nnn, result);
}
t = nn;
n = nnn;
break;
}
}
addSpacemarker(l, t, result);
pasteArg1 = t;
} else {
result.append(t);
}
break;
default:
if (isKind(n, IToken.tPOUNDPOUND)) {
addSpacemarker(l, t, result); // start token paste
pasteArg1 = t;
} else {
result.append(t);
}
break;
}
}
}