private ILocationResolver getResolver(IASTTranslationUnit tu) {
final ILocationResolver resolver = (ILocationResolver) tu.getAdapter(ILocationResolver.class);
if (resolver == null) {
throw new IllegalArgumentException();
}
return resolver;
}
public MultiMacroExpansionExplorer(IASTTranslationUnit tu, IASTFileLocation loc) {
if (tu == null || loc == null || loc.getNodeLength() == 0) {
throw new IllegalArgumentException();
}
final ILocationResolver resolver = getResolver(tu);
final IASTNodeSelector nodeLocator = tu.getNodeSelector(null);
final IASTPreprocessorMacroExpansion[] expansions = resolver.getMacroExpansions(loc);
final int count = expansions.length;
loc = extendLocation(loc, expansions);
fMacroLocations = getMacroLocations(resolver);
fFilePath = tu.getFilePath();
fSource = resolver.getUnpreprocessedSignature(loc);
fBoundaries = new int[count * 2 + 1];
fDelegates = new SingleMacroExpansionExplorer[count];
final int firstOffset = loc.getNodeOffset();
int bidx = -1;
int didx = -1;
for (IASTPreprocessorMacroExpansion expansion : expansions) {
IASTName ref = expansion.getMacroReference();
if (ref != null) {
ArrayList<IASTName> refs = new ArrayList<IASTName>();
refs.add(ref);
refs.addAll(Arrays.asList(expansion.getNestedMacroReferences()));
IASTFileLocation refLoc = expansion.getFileLocation();
int from = refLoc.getNodeOffset() - firstOffset;
int to = from + refLoc.getNodeLength();
IASTNode enclosing = nodeLocator.findEnclosingNode(from + firstOffset - 1, 2);
boolean isPPCond =
enclosing instanceof IASTPreprocessorIfStatement
|| enclosing instanceof IASTPreprocessorElifStatement;
fBoundaries[++bidx] = from;
fBoundaries[++bidx] = to;
fDelegates[++didx] =
new SingleMacroExpansionExplorer(
new String(fSource, from, to - from),
refs.toArray(new IASTName[refs.size()]),
fMacroLocations,
fFilePath,
refLoc.getStartingLineNumber(),
isPPCond,
(LexerOptions) tu.getAdapter(LexerOptions.class));
}
}
fBoundaries[++bidx] = fSource.length;
}