gcc-parser: assign GCC_ANALYZER_WARNING checker

... for reports produced by `gcc -fanalyzer`

Closes: https://github.com/kdudka/csdiff/pull/12

Author: kdudka

gcc-parser.cc

@@ -541,8 +541,56 @@ bool BasicGccParser::hasError() const {
     return hasError_;
 }
 
+class PostProcessor {
+    public:
+        PostProcessor():
+            reGccAnalCoreEvt_("^(.*) \\[-Wanalyzer-[A-Za-z0-9-]+\\]$"),
+            reGccAnalCwe_("^.* \\[CWE-([0-9]+)\\]$")
+        {
+        }
+
+        /// apply final transformations on a successfully parsed defect
+        void apply(Defect *pDef);
+
+    private:
+        const boost::regex reGccAnalCoreEvt_;
+        const boost::regex reGccAnalCwe_;
+
+        void transGccAnal(Defect *pDef);
+};
+
+void PostProcessor::transGccAnal(Defect *pDef) {
+    if ("COMPILER_WARNING" != pDef->checker)
+        return;
+
+    // check for [-Wanalyzer-...] suffix in message of the key event
+    DefEvent &keyEvt = pDef->events[pDef->keyEventIdx];
+    boost::smatch sm;
+    if (!boost::regex_match(keyEvt.msg, sm, reGccAnalCoreEvt_))
+        return;
+
+    // COMPILER_WARNING -> GCC_ANALYZER_WARNING
+    pDef->checker = "GCC_ANALYZER_WARNING";
+
+    // pick CWE number if available
+    const std::string rawMsg = sm[/* msg */ 1];
+    if (boost::regex_match(rawMsg, sm, reGccAnalCwe_)) {
+        try {
+            pDef->cwe = boost::lexical_cast<int>(sm[/* cwe */ 1]);
+        }
+        catch (boost::bad_lexical_cast &) {
+            pDef->cwe = 0;
+        }
+    }
+}
+
+void PostProcessor::apply(Defect *pDef) {
+    this->transGccAnal(pDef);
+}
+
 struct GccParser::Private {
     BasicGccParser              core;
+    PostProcessor               postProc;
     Defect                      lastDef;
     const boost::regex          reLocation;
 
@@ -640,6 +688,9 @@ bool GccParser::getNext(Defect *pDef) {
     for (unsigned idx = 0U; idx < evtCount; ++idx)
         evtList[idx].verbosityLevel = (keyEventIdx != idx);
 
+    // apply final transformations
+    d->postProc.apply(pDef);
+
     return true;
 }
 

tests/CMakeLists.txt

@@ -173,6 +173,7 @@ test_csgrep(csgrep      "53-csparser-note-events"     )
 test_csgrep(csgrep      "54-csparser-unknown-lineno"  )
 test_csgrep(csgrep      "55-csparser-pylint-copr"     )
 test_csgrep(csgrep      "56-gcc-sparser-clang-error"  )
+test_csgrep(csgrep      "57-gcc-parser-gcc-analyzer-curl")
 test_csparser(csparser-5.8                          00)
 test_csparser(csparser-5.8                          01)
 test_csparser(csparser-5.8                          02)