More fixes for issues reported by Coverity.

src/common/PJoystickHandler.cxx

@@ -420,7 +420,7 @@ string PhysicalJoystickHandler::getMappingDesc(Event::Type event, EventMode mode
             case JoyHat::DOWN:  buf << "/down";  break;
             case JoyHat::LEFT:  buf << "/left";  break;
             case JoyHat::RIGHT: buf << "/right"; break;
-            case JoyHat::CENTER:                 break;
+            default:                             break;
           }
         }
       }

src/common/RewindManager.hxx

@@ -178,7 +178,7 @@ class RewindManager
       // We do nothing on object instantiation or copy
       // The goal of LinkedObjectPool is to not do any allocations at all
       RewindState() : cycles(0) { }
-      RewindState(const RewindState&) { }
+      RewindState(const RewindState& rs) : cycles(rs.cycles) { }
 
       // Output object info; used for debugging only
       friend ostream& operator<<(ostream& os, const RewindState& s) {

src/common/main.cxx

@@ -124,6 +124,8 @@ int main(int argc, char* argv[])
     }
   }
   else
+  {
+    try
     {
       const string& result = theOSystem->createConsole(romnode);
       if(result != EmptyString)
@@ -131,13 +133,14 @@ int main(int argc, char* argv[])
 
       if(theOSystem->settings().getBool("takesnapshot"))
       {
-      try {
-        theOSystem->logMessage("Taking snapshots with 'takesnapshot' ...", 2);
         for(int i = 0; i < 30; ++i)  theOSystem->frameBuffer().update();
         theOSystem->png().takeSnapshot();
-      } catch(const runtime_error& e) {
-        cout << e.what() << endl;
+        return Cleanup();
       }
+    }
+    catch(const runtime_error& e)
+    {
+      theOSystem->logMessage(e.what(), 0);
       return Cleanup();
     }
 

src/debugger/CartDebug.cxx

@@ -735,7 +735,7 @@ string CartDebug::loadListFile()
 
     getline(in, line);
 
-    if(line.length() == 0 || line[0] == '-')
+    if(!in.good() || line == "" || line[0] == '-')
       continue;
     else  // Search for constants
     {
@@ -798,6 +798,7 @@ string CartDebug::loadSymbolFile()
     int value = -1;
 
     getline(in, label);
+    if(!in.good())  continue;
     stringstream buf(label);
     buf >> label >> hex >> value;
 

src/debugger/gui/DrivingWidget.cxx

@@ -64,11 +64,15 @@ void DrivingWidget::loadConfig()
   if(myController.read(Controller::Two)) gray += 2;
 
   for(myGrayIndex = 0; myGrayIndex < 4; ++myGrayIndex)
+  {
     if(ourGrayTable[myGrayIndex] == gray)
+    {
+      setValue(myGrayIndex);
       break;
+    }
+  }
 
   myFire->setState(!myController.read(Controller::Six));
-  setValue();
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -81,13 +85,13 @@ void DrivingWidget::handleCommand(
       myGrayIndex = (myGrayIndex + 1) % 4;
       myController.set(Controller::One, (ourGrayTable[myGrayIndex] & 0x1) != 0);
       myController.set(Controller::Two, (ourGrayTable[myGrayIndex] & 0x2) != 0);
-      setValue();
+      setValue(myGrayIndex);
       break;
     case kGrayDownCmd:
       myGrayIndex = myGrayIndex == 0 ? 3 : myGrayIndex - 1;
       myController.set(Controller::One, (ourGrayTable[myGrayIndex] & 0x1) != 0);
       myController.set(Controller::Two, (ourGrayTable[myGrayIndex] & 0x2) != 0);
-      setValue();
+      setValue(myGrayIndex);
       break;
     case kFireCmd:
       myController.set(Controller::Six, !myFire->getState());
@@ -96,9 +100,9 @@ void DrivingWidget::handleCommand(
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-void DrivingWidget::setValue()
+void DrivingWidget::setValue(int idx)
 {
-  int grayCode = ourGrayTable[myGrayIndex];
+  int grayCode = ourGrayTable[idx];
   // FIXME  * 8 = a nasty hack, because the DataGridWidget does not support 2 digit binary output
   myGrayValue->setList(0, (grayCode & 0b01) + (grayCode & 0b10) * 8);
 }

src/debugger/gui/DrivingWidget.hxx

@@ -50,7 +50,7 @@ class DrivingWidget : public ControllerWidget
     void loadConfig() override;
     void handleCommand(CommandSender* sender, int cmd, int data, int id) override;
 
-    void setValue();
+    void setValue(int idx);
 
     // Following constructors and assignment operators not supported
     DrivingWidget() = delete;

src/debugger/gui/TiaWidget.cxx

@@ -127,7 +127,7 @@ TiaWidget::TiaWidget(GuiObject* boss, const GUI::Font& lfont,
                          2*fontWidth, fontHeight,
                          rowLabel[row], TextAlign::Left);
 
-    for(uInt32 col = 0; col < 5 - row; ++col)
+    for(uInt32 col = 0; col < 5 - row; ++col, ++idx)
     {
       myCollision[idx] = new CheckboxWidget(boss, lfont, collX, collY, "", CheckboxWidget::kCheckActionCmd);
       myCollision[idx]->setTarget(this);
@@ -149,7 +149,6 @@ TiaWidget::TiaWidget(GuiObject* boss, const GUI::Font& lfont,
                            colLabel[col], TextAlign::Left);
 
       collX += myCollision[idx]->getWidth() + 10;
-      idx++;
     }
     collX = xpos + lwidth + 5;
     collY += lineHeight+3;

src/emucore/EventHandler.cxx

@@ -719,8 +719,19 @@ void EventHandler::setComboMap()
   replace(list.begin(), list.end(), ':', ' ');
   istringstream buf(list);
 
+  // Erase the 'combo' array
+  auto ERASE_ALL = [&]() {
+    for(int i = 0; i < kComboSize; ++i)
+      for(int j = 0; j < kEventsPerCombo; ++j)
+        myComboTable[i][j] = Event::NoType;
+  };
+
   // Get combo count, which should be the first int in the list
   // If it isn't, then we treat the entire list as invalid
+  if(!buf.good())
+    ERASE_ALL();
+  else
+  {
     string key;
     buf >> key;
     if(atoi(key.c_str()) == kComboSize)
@@ -743,11 +754,7 @@ void EventHandler::setComboMap()
       }
     }
     else
-  {
-    // Erase the 'combo' array
-    for(int i = 0; i < kComboSize; ++i)
-      for(int j = 0; j < kEventsPerCombo; ++j)
-        myComboTable[i][j] = Event::NoType;
+      ERASE_ALL();
   }
 
   saveComboMapping();

src/emucore/tia/TIA.cxx

@@ -166,11 +166,13 @@ void TIA::reset()
   mySound.reset();
   myDelayQueue.reset();
 
-  if (myFrameManager) myFrameManager->reset();
-
   myCyclesAtFrameStart = 0;
 
+  if (myFrameManager)
+  {
+    myFrameManager->reset();
     frameReset();  // Recalculate the size of the display
+  }
 
   // Must be done last, after all other items have reset
   enableFixedColors(mySettings.getBool(mySettings.getBool("dev.settings") ? "dev.debugcolors" : "plr.debugcolors"));