rewind/unwind commands enhanced with optional number of levels parameter

src/debugger/Debugger.cxx

@@ -458,30 +458,37 @@ void Debugger::updateRewindbuttons(const RewindManager& r)
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool Debugger::windState(bool unwind)
+uInt16 Debugger::windStates(uInt16 levels, bool unwind)
 {
   RewindManager& r = myOSystem.state().rewindManager();
 
   mySystem.clearDirtyPages();
 
   unlockBankswitchState();
-  bool result = unwind ? r.unwindState() : r.rewindState();
+
+  uInt16 winds = 0;
+  for(uInt16 i = 0; i < levels; ++i)
+    if(unwind ? r.unwindState() : r.rewindState())
+      winds++;
+    else
+      break;
+
   lockBankswitchState();
 
   updateRewindbuttons(r);
-  return result;
+  return winds;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool Debugger::rewindState()
+uInt16 Debugger::rewindStates(const uInt16 levels)
 {
-  return windState(false);
+  return windStates(levels, false);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool Debugger::unwindState()
+uInt16 Debugger::unwindStates(const uInt16 levels)
 {
-  return windState(true);
+  return windStates(levels, true);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

src/debugger/Debugger.hxx

@@ -270,8 +270,8 @@ class Debugger : public DialogContainer
     int trace();
     void nextScanline(int lines);
     void nextFrame(int frames);
-    bool rewindState();
-    bool unwindState();
+    uInt16 rewindStates(const uInt16 levels);
+    uInt16 unwindStates(const uInt16 levels);
 
     void toggleBreakPoint(uInt16 bp);
 
@@ -328,8 +328,8 @@ class Debugger : public DialogContainer
     static PseudoRegister ourPseudoRegisters[NUM_PSEUDO_REGS];
 
   private:
-    // rewind/unwind one state
-    bool windState(bool unwind);
+    // rewind/unwind n states
+    uInt16 windStates(uInt16 levels, bool unwind);
     // update the rewind/unwind button state
     void updateRewindbuttons(const RewindManager& r);
 

src/debugger/DebuggerParser.cxx

@@ -1335,13 +1335,7 @@ void DebuggerParser::executeReset()
 // "rewind"
 void DebuggerParser::executeRewind()
 {
-  if(debugger.rewindState())
-  {
-    debugger.rom().invalidate();
-    commandResult << "rewind by one level";
-  }
-  else
-    commandResult << "no states left to rewind";
+  executeWinds(false);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -1843,13 +1837,7 @@ void DebuggerParser::executeUndef()
 // "unwind"
 void DebuggerParser::executeUnwind()
 {
-  if(debugger.unwindState())
-  {
-    debugger.rom().invalidate();
-    commandResult << "unwind by one level";
-  }
-  else
-    commandResult << "no states left to rewind";
+  executeWinds(true);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -1870,6 +1858,29 @@ void DebuggerParser::executeWatch()
   commandResult << "added watch \"" << argStrings[0] << "\"";
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+// wrapper function for rewind/unwind commands
+// TODO: return and output (formatted) cycles
+void DebuggerParser::executeWinds(bool unwind)
+{
+  uInt16 levels;
+  string type = unwind ? "unwind" : "rewind";
+
+  if(argCount == 0)
+    levels = 1;
+  else
+    levels = args[0];
+
+  uInt16 winds = unwind ? debugger.unwindStates(levels) : debugger.rewindStates(levels);
+  if(winds > 0)
+  {
+    debugger.rom().invalidate();
+    commandResult << type << " by " << winds << " level" << (winds > 1 ? "s" : "");
+  }
+  else
+    commandResult << "no states left to " << type;
+}
+
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 // "x"
 void DebuggerParser::executeX()
@@ -2335,11 +2346,11 @@ DebuggerParser::Command DebuggerParser::commands[kNumCommands] = {
 
   {
     "rewind",
-    "Rewind state to last step/trace/scanline/frame",
-    "Rewind currently only works in the debugger",
+    "Rewind state to last step/trace/scanline/frame...",
+    "Example: rewind, rewind 5",
     false,
     true,
-    { kARG_END_ARGS },
+    { kARG_WORD, kARG_END_ARGS },
     std::mem_fn(&DebuggerParser::executeRewind)
   },
 
@@ -2628,11 +2639,11 @@ DebuggerParser::Command DebuggerParser::commands[kNumCommands] = {
 
   {
     "unwind",
-    "Unwind state to last step/trace/scanline/frame",
-    "Unwind currently only works in the debugger",
+    "Unwind state to next step/trace/scanline/frame...",
+    "Example: unwind, unwind 5",
     false,
     true,
-    { kARG_END_ARGS },
+    { kARG_WORD, kARG_END_ARGS },
     std::mem_fn(&DebuggerParser::executeUnwind)
   },
 

src/debugger/DebuggerParser.hxx

@@ -212,6 +212,7 @@ class DebuggerParser
     void executeUnwind();
     void executeV();
     void executeWatch();
+    void executeWinds(bool unwind);
     void executeX();
     void executeY();
     void executeZ();