Fixed #683 (wrong usage of strcmp)

lib/checkother.cpp

@@ -1277,6 +1277,20 @@ private:
 
         return &tok;
     }
+
+    bool parseCondition(const Token &tok, std::list<ExecutionPath *> &checks) const
+    {
+        if (Token::Match(&tok, "!| %var% ("))
+        {
+            bool foundError = false;
+            std::list<const Token *> var;
+            parseFunctionCall(tok.str() == "!" ? *tok.next() : tok, var, 0);
+            for (std::list<const Token *>::const_iterator it = var.begin(); it != var.end(); ++it)
+                dereference(foundError, checks, *it);
+        }
+
+        return ExecutionPath::parseCondition(tok, checks);
+    }
 };
 
 
@@ -1592,6 +1606,24 @@ private:
         }
         return &tok;
     }
+
+    bool parseCondition(const Token &tok, std::list<ExecutionPath *> &checks) const
+    {
+        bool foundError = false;
+
+        if (tok.varId() && Token::Match(&tok, "%var% <|<=|==|!=|)|["))
+            use(foundError, checks, &tok);
+
+        else if (Token::Match(&tok, "!| %var% ("))
+        {
+            std::list<const Token *> var;
+            parseFunctionCall(tok.str() == "!" ? *tok.next() : tok, var, 1);
+            for (std::list<const Token *>::const_iterator it = var.begin(); it != var.end(); ++it)
+                use_array(foundError, checks, *it);
+        }
+
+        return ExecutionPath::parseCondition(tok, checks);
+    }
 };
 
 

lib/executionpath.cpp

@@ -22,6 +22,32 @@
 #include <memory>
 
 
+// default : bail out if the condition is has variable handling
+bool ExecutionPath::parseCondition(const Token &tok, std::list<ExecutionPath *> & /*checks*/) const
+{
+    unsigned int parlevel = 0;
+    for (const Token *tok2 = &tok; tok2; tok2 = tok2->next())
+    {
+        if (tok2->str() == "(")
+            ++parlevel;
+        else if (tok2->str() == ")")
+        {
+            if (parlevel == 0)
+                break;
+            --parlevel;
+        }
+        else if (Token::Match(tok2, ";{}"))
+            break;
+        if (tok2->varId() != 0)
+        {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+
 const Token *checkExecutionPaths(const Token *tok, std::list<ExecutionPath *> &checks)
 {
     const std::auto_ptr<ExecutionPath> check(checks.front()->copy());
@@ -70,23 +96,15 @@ const Token *checkExecutionPaths(const Token *tok, std::list<ExecutionPath *> &c
                 // goto "("
                 tok = tok->next();
 
-                // goto ")"
+                // parse condition
-                tok = tok ? tok->link() : 0;
+                if (check->parseCondition(*tok->next(), checks))
-
-                // Check if the condition contains the variable
-                if (tok)
-                {
-                    for (const Token *tok2 = tok->link(); tok2 && tok2 != tok; tok2 = tok2->next())
-                    {
-                        // The variable may be initialized..
-                        // if (someFunction(&var)) ..
-                        if (tok2->varId())
                 {
                     ExecutionPath::bailOut(checks);
                     return 0;
                 }
-                    }
+
-                }
+                // goto ")"
+                tok = tok ? tok->link() : 0;
 
                 // goto "{"
                 tok = tok ? tok->next() : 0;

lib/executionpath.h

@@ -80,11 +80,19 @@ public:
     /**
      * Parse tokens at given location
      * @param tok token to parse
-     * @param foundError If an error is found this is set to true and the return token is the error token
+     * @param foundError If an error is found this is set to true
      * @param checks The execution paths. All execution paths in the list are executed in the current scope.
-     * @return if error is found => error token. if you want to skip tokens, return the last skipped token. otherwise return tok.
+     * @return the token before the "next" token.
      **/
     virtual const Token *parse(const Token &tok, bool &foundError, std::list<ExecutionPath *> &checks) const = 0;
+
+    /**
+     * Parse condition
+     * @param tok first token in condition.
+     * @param checks The execution paths. All execution paths in the list are executed in the current scope
+     * @return true => bail out all checking
+     **/
+    virtual bool parseCondition(const Token &tok, std::list<ExecutionPath *> &checks) const;
 };
 
 

test/testother.cpp

@@ -998,6 +998,13 @@ private:
                        "}\n");
         ASSERT_EQUALS("[test.cpp:4]: (error) Uninitialized variable: ret\n", errout.str());
 
+        checkUninitVar("static void foo()\n"
+                       "{\n"
+                       "    int i;\n"
+                       "    if (i);\n"
+                       "}\n");
+        ASSERT_EQUALS("[test.cpp:4]: (error) Uninitialized variable: i\n", errout.str());
+
         checkUninitVar("static void foo()\n"
                        "{\n"
                        "    int x, y;\n"