- switch if combination

- add action: Add, Subtract, Multiply, Devide, Equal, Pop, Jump

diff --git a/src/action.js b/src/action.js
index e46cb73..bb09166 100644 (file)
--- a/src/action.js
+++ b/src/action.js
@@ -17,38 +17,110 @@ FlappAction.exec = function(tag, movieClip, rootMovieClip) {
     var code = 0;
     var stack = [];
     while (code = actionsBit.ui8()) {
-        if (code < 0x80) {
-            switch (code) {
-            case 0x06: // Play
-                movieClip.play();
-                break;
-            case 0x07: // Stop
-                movieClip.stop();
-                break;
-            case 0x1d: // SetVariables
-                movieClip.setVariable(stack.pop(), stack.pop());
-                break;
-            default:
-                console.debug("FlappActiom: not implemented yet. code=0x%02x", code);
-                break;
-            }
-        } else {
+       console.debug("FlappAction code:0x"+code.toString(16));
+        if (code < 0x80) { // No Operand
+            if (code < 0x17) { // 0x17(Pop)
+               switch (code) {
+               case 0x06: // Play
+                    movieClip.play();
+                    break;
+               case 0x07: // Stop
+                    movieClip.stop();
+                    break;
+               default:
+                    console.debug("FlappActiom: not implemented yet. code=0x%02x", code);
+                    break;
+               }
+           } else { // 0x17(Pop)<=code
+               switch (code) {
+               case 0x0a: // Add
+                   var a = stack.pop();
+                   var b = stack.pop();
+                   a = (typeof a === 'number')?a:0;
+                   b = (typeof b === 'number')?b:0;
+                   stack.push(a + b);
+                   break;
+               case 0x0b: // Subtract
+                   var a = stack.pop();
+                   var b = stack.pop();
+                   a = (typeof a === 'number')?a:0;
+                   b = (typeof b === 'number')?b:0;
+                   stack.push(b - a);
+                   break;
+               case 0x0c: // Multiply
+                   var a = stack.pop();
+                   var b = stack.pop();
+                   a = (typeof a === 'number')?a:0;
+                   b = (typeof b === 'number')?b:0;
+                   stack.push(a * b);
+                   break;
+               case 0x0c: // Devide
+                   var a = stack.pop();
+                   var b = stack.pop();
+                   a = (typeof a === 'number')?a:0;
+                   b = (typeof b === 'number')?b:0;
+                   if (a === 0) {
+                       stack.push('#ERROR#'); // SWF4
+                       // Note: For SWF5, Infinity or -Infinity is pushed.
+                   } else {
+                       stack.push(b / a);
+                   }
+                   break;
+               case 0x0e: // Equals
+                   var a = stack.pop();
+                   var b = stack.pop();
+                   a = (typeof a === 'number')?a:0;
+                   b = (typeof b === 'number')?b:0;
+                   if (a === b) {
+                       stack.push(1); // SWF4
+                       // Note: For SWF5, true is pushed.
+                   } else {
+                       stack.push(0);
+                       // Note: For SWF5, false is pushed.
+                   }
+                   break;
+               case 0x17: // Pop
+                   stack.pop(); // discards the value
+                   break;
+               case 0x1d: // SetVariables
+                    movieClip.setVariable(stack.pop(), stack.pop());
+                    break;
+               default:
+                    console.debug("FlappActiom: not implemented yet. code=0x%02x", code);
+                    break;
+               }
+           }
+        } else { // with Operand
             var actionLength = actionsBit.input(tag.actions);
             var nextActionOffset = actionsBit.getBytePos() + actionLength;
-            switch (code) {
-            case 0x81: // GotoFrame
-                movieClip.gotoFrame(actionsBit.si16());
-                break;
-            case 0x83: // GetURL
-                //
-                break;
-            case 0x8c: // GoToLabel
-                movieClip.gotoLabel(actionsBit.strN(actionLength));
-                break;
-                //case 0x96: // Push
-            default:
-                console.debug("FlappActiom: not implemented yet. code=0x%02x", code);
-                break;
+           if (code < 0x96) { // 0x96(Push)
+               switch (code) {
+               case 0x81: // GotoFrame
+                    movieClip.gotoFrame(actionsBit.si16());
+                    break;
+               case 0x83: // GetURL
+                    //
+                    break;
+               case 0x8c: // GoToLabel
+                    movieClip.gotoLabel(actionsBit.strN(actionLength));
+                    break;
+               default:
+                    console.debug("FlappActiom: not implemented yet. 0x"+code.toString(16));
+                    break;
+               }
+           } else { // 0x96(Push)<=code
+               switch (code) {
+                case 0x96: // Push
+                   //
+                    break;
+                case 0x99: // Jump
+                    var branchOffset = actionsBit.si16();
+                    actionsBit.seek(branchOffset, 0);
+                    break;
+               default:
+                    console.debug("FlappActiom: not implemented yet. 0x"+code.toString(16));
+                    break;
+               }
             }
             actionsBit.setPos(nextActionOffset, 0);
         }