bool HeaderTagger::isInterceptedLibHeader(const clang::SourceLocation& loc) const {
if(!loc.isValid()) { return false; }
auto fit = isInterceptedCache.find(sm.getFileID(loc));
if(fit != isInterceptedCache.end()) { return !fit->second.second; }
std::string filename = sm.getPresumedLoc(loc).getFilename();
bool isIntercepted = isInterceptedLibHeader(filename);
isInterceptedCache[sm.getFileID(loc)] = {filename, !isIntercepted};
return isIntercepted;
}
string HeaderTagger::getTopLevelInclude(const clang::SourceLocation& includeLocation) const{
// if it is a dead end
if (!includeLocation.isValid()) {
return "";
}
auto toFilename = [&] (const clang::SourceLocation& loc) {
return sm.getPresumedLoc(loc).getFilename();
};
// get the presumed location (whatever this is, ask clang) ...
// ~ ploc represents the file were includeLocation is located
clang::PresumedLoc ploc = sm.getPresumedLoc(includeLocation);
// .. and retrieve the associated include
// ~ from where the file ploc represents was included
clang::SourceLocation includingLocation = ploc.getIncludeLoc();
// check whether the stack can be continued
if (!includingLocation.isValid()) {
return ""; // this happens when element is declared in c / cpp file => no header
}
// ~ pIncludeLoc represents the file were includLoc is located
clang::PresumedLoc pIncludeLoc = sm.getPresumedLoc(includingLocation);
if( isInjectedHeader(pIncludeLoc) ){
//the header was injected -- has no valid filename ("<command line">)
return "";
}
//*******************
//
// travel down until we are at the sourcefile then work up again
// if userProvided header, we need to go further
// if userSearchPath/systemSearch path we need to include de header
//
//*******************
// descent further as long as we have a header file as presumed include includeLocation
if ( isHeaderFile(toFilename(includingLocation) )) {
// check if last include was in the search path and next is not,
// this case is a system header included inside of a programmer include chain
// BUT if both are still in the search path, continue cleaning the include
if (isStdLibHeader(includeLocation) && !isStdLibHeader(includingLocation)){
if(!isIntrinsicHeader(toFilename(includingLocation))) {
return ploc.getFilename();
}
}
if (isInterceptedLibHeader(includeLocation) && !isInterceptedLibHeader(includingLocation)){
if(!isIntrinsicHeader(toFilename(includingLocation))) {
return ploc.getFilename();
}
}
if (isUserLibHeader(includeLocation) && !isUserLibHeader(includingLocation)){
if(!isIntrinsicHeader(toFilename(includingLocation))) {
return ploc.getFilename();
}
}
return getTopLevelInclude(includingLocation);
}
// we already visited all the headers and we are in the .c/.cpp file
if (isHeaderFile(ploc.getFilename())) {
if(isIntrinsicHeader(ploc.getFilename())) {
return ploc.getFilename();
}
if (isStdLibHeader(ploc.getFilename()) ) {
return ploc.getFilename(); // this happens when header file is included straight in the code
}
if (isInterceptedLibHeader(ploc.getFilename())) {
return ploc.getFilename(); // this happens when header file is included straight in the code
}
if (isUserLibHeader(ploc.getFilename())) {
return ploc.getFilename();
}
return ""; // this happens when is declared in a header which is not system header
}
/*
// we already visited all the headers and we are in the .c/.cpp file
if (!isHeaderFile(sm.getPresumedLoc(includeLoc).getFilename())) {
return ploc.getFilename();
}
*/
return "";
}