Small refactorizations:

- Optimized performance of several functions by adding pre-checks
- Simplified some code
- Fixed VS warning in testsymboldatabase.cpp

lib/checkstring.cpp

@@ -85,7 +85,7 @@ void CheckString::checkAlwaysTrueOrFalseStringCompare()
         return;
 
     for (const Token* tok = _tokenizer->tokens(); tok; tok = tok->next()) {
-        if (tok->isName() && Token::Match(tok, "memcmp|strncmp|strcmp|stricmp|strverscmp|bcmp|strcmpi|strcasecmp|strncasecmp|strncasecmp_l|strcasecmp_l|wcsncasecmp|wcscasecmp|wmemcmp|wcscmp|wcscasecmp_l|wcsncasecmp_l|wcsncmp|_mbscmp|_memicmp|_memicmp_l|_stricmp|_wcsicmp|_mbsicmp|_stricmp_l|_wcsicmp_l|_mbsicmp_l (")) {
+        if (tok->isName() && tok->strAt(1) == "(" && Token::Match(tok, "memcmp|strncmp|strcmp|stricmp|strverscmp|bcmp|strcmpi|strcasecmp|strncasecmp|strncasecmp_l|strcasecmp_l|wcsncasecmp|wcscasecmp|wmemcmp|wcscmp|wcscasecmp_l|wcsncasecmp_l|wcsncmp|_mbscmp|_memicmp|_memicmp_l|_stricmp|_wcsicmp|_mbsicmp|_stricmp_l|_wcsicmp_l|_mbsicmp_l")) {
             if (Token::Match(tok->tokAt(2), "%str% , %str% ,|)")) {
                 const std::string &str1 = tok->strAt(2);
                 const std::string &str2 = tok->strAt(4);

lib/preprocessor.cpp

@@ -1346,11 +1346,10 @@ std::list<std::string> Preprocessor::getcfgs(const std::string &filedata, const
                 }
             }
             if (par != 0) {
-                std::ostringstream lineStream;
-                lineStream << __LINE__;
-                const std::string errorId = "preprocessor" + lineStream.str();
+                std::ostringstream errorId;
+                errorId << "preprocessor" <<  __LINE__;
                 const std::string errorText = "mismatching number of '(' and ')' in this line: " + def;
-                writeError(filename, linenr, _errorLogger, errorId, errorText);
+                writeError(filename, linenr, _errorLogger, errorId.str(), errorText);
                 ret.clear();
                 return ret;
             }
@@ -1455,8 +1454,7 @@ std::list<std::string> Preprocessor::getcfgs(const std::string &filedata, const
                 deflist.back() = ndeflist.back();
                 ndeflist.pop_back();
             } else {
-                std::string tempDef((deflist.back() == "1") ? "0" : "1");
-                deflist.back() = tempDef;
+                deflist.back() = (deflist.back() == "1") ? "0" : "1";
             }
         }
 

lib/symboldatabase.cpp

@@ -1208,7 +1208,7 @@ SymbolDatabase::SymbolDatabase(const Tokenizer *tokenizer, const Settings *setti
 
     // find enumerators
     for (const Token* tok = _tokenizer->list.front(); tok != _tokenizer->list.back(); tok = tok->next()) {
-        if (!tok->isName() || tok->varId() || tok->function() || tok->type() || tok->enumerator())
+        if (tok->tokType() != Token::eName)
             continue;
         const Enumerator * enumerator = findEnumerator(tok);
         if (enumerator)

lib/tokenize.cpp

@@ -8897,7 +8897,10 @@ void Tokenizer::simplifyBitfields()
         }
         Token *last = nullptr;
 
-        if (Token::Match(tok, ";|{|}|public:|protected:|private: const| %type% %name% :") &&
+        if (!Token::Match(tok, ";|{|}|public:|protected:|private:"))
+            continue;
+
+        if (Token::Match(tok->next(), "const| %type% %name% :") &&
             !Token::Match(tok->next(), "case|public|protected|private|class|struct") &&
             !Token::simpleMatch(tok->tokAt(2), "default :")) {
             Token *tok1 = (tok->next()->str() == "const") ? tok->tokAt(3) : tok->tokAt(2);
@@ -8912,7 +8915,7 @@ void Tokenizer::simplifyBitfields()
 
                 last = tok1->next();
             }
-        } else if (Token::Match(tok, ";|{|}|public:|protected:|private: const| %type% : %any% ;") &&
+        } else if (Token::Match(tok->next(), "const| %type% : %any% ;") &&
                    tok->next()->str() != "default") {
             const int offset = (tok->next()->str() == "const") ? 1 : 0;
 

test/testsymboldatabase.cpp

@@ -2297,7 +2297,7 @@ private:
     void enum4() { // #7493
         GET_SYMBOL_DB("enum Offsets { O1, O2, O3 };\n"
                       "enum MyEnums { E1=O1+1, E2=O2+1, E3=O3+1 };");
-        ASSERT(db);
+        ASSERT(db != nullptr);
         if (!db)
             return;
         ASSERT_EQUALS(3U, db->scopeList.size());