avoid throwing EmptyStackExceptions in as2 deobfuscation

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/deobfuscation/AVM2DeobfuscatorRegisters.java

@@ -175,6 +175,7 @@ public class AVM2DeobfuscatorRegisters extends AVM2DeobfuscatorSimple {
         toVisit.add(idx);
         List<TranslateStack> toVisitStacks = new ArrayList<>();
         toVisitStacks.add(stack);
+        outer:
         while (!toVisit.isEmpty()) {
             idx = toVisit.remove(0);
             stack = toVisitStacks.remove(0);
@@ -192,6 +193,12 @@ public class AVM2DeobfuscatorRegisters extends AVM2DeobfuscatorSimple {
                     InstructionDefinition def = ins.definition;
                     //System.err.println("" + idx + ": " + ins + " stack:" + stack.size());
 
+                    // do not throw EmptyStackException, much faster
+                    int requiredStackSize = ins.getStackPopCount(localData);
+                    if (stack.size() < requiredStackSize) {
+                        continue outer;
+                    }
+
                     ins.translate(localData, stack, output, Graph.SOP_USE_STATIC, "");
 
                     //if (!(def instanceof KillIns))

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/instructions/AVM2Instruction.java

@@ -331,6 +331,7 @@ public class AVM2Instruction implements Cloneable, GraphSourceItem {
     @Override
     public void translate(BaseLocalData localData, TranslateStack stack, List<GraphTargetItem> output, int staticOperation, String path) throws InterruptedException {
         AVM2LocalData aLocalData = (AVM2LocalData) localData;
+        //int expectedSize = stack.size() - getStackPopCount(localData, stack) + getStackPushCount(localData, stack);
         definition.translate(aLocalData.isStatic,
                 aLocalData.scriptIndex,
                 aLocalData.classIndex,
@@ -338,12 +339,31 @@ public class AVM2Instruction implements Cloneable, GraphSourceItem {
                 stack,
                 aLocalData.scopeStack,
                 aLocalData.constants, this, aLocalData.methodInfo, output, aLocalData.methodBody, aLocalData.abc, aLocalData.localRegNames, aLocalData.fullyQualifiedNames, null, aLocalData.localRegAssignmentIps, aLocalData.ip, aLocalData.refs, aLocalData.code);
+        /*if (stack.size() != expectedSize) {
+         throw new Error("HONFIKA stack size mismatch");
+         }*/
+    }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        AVM2LocalData aLocalData = (AVM2LocalData) localData;
+        return getStackPopCount(aLocalData);
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        AVM2LocalData aLocalData = (AVM2LocalData) localData;
+        return getStackPushCount(aLocalData);
     }
 
     public int getStackPopCount(AVM2LocalData aLocalData) {
         return definition.getStackPopCount(this, aLocalData.abc);
     }
 
+    public int getStackPushCount(AVM2LocalData aLocalData) {
+        return definition.getStackPushCount(this, aLocalData.abc);
+    }
+
     @Override
     public boolean isJump() {
         return (definition instanceof JumpIns) || (fixedBranch > -1);

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/Action.java

@@ -711,6 +711,16 @@ public abstract class Action implements GraphSourceItem {
     public void translate(TranslateStack stack, List<GraphTargetItem> output, HashMap<Integer, String> regNames, HashMap<String, GraphTargetItem> variables, HashMap<String, GraphTargetItem> functions, int staticOperation, String path) throws InterruptedException {
     }
 
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 0;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 0;
+    }
+
     /**
      * Pops long value off the stack
      *
@@ -870,7 +880,16 @@ public abstract class Action implements GraphSourceItem {
     @Override
     public void translate(BaseLocalData localData, TranslateStack stack, List<GraphTargetItem> output, int staticOperation, String path) throws InterruptedException {
         ActionLocalData aLocalData = (ActionLocalData) localData;
+        /*int expectedSize = stack.size() - getStackPopCount(localData, stack);
+         if (expectedSize < 0) {
+         expectedSize = 0;
+         }
+         expectedSize += getStackPushCount(localData, stack);*/
+
         translate(stack, output, aLocalData.regNames, aLocalData.variables, aLocalData.functions, staticOperation, path);
+        /*if (stack.size() != expectedSize && !(this instanceof ActionPushDuplicate)) {
+         throw new Error("HONFIKA stack size mismatch");
+         }*/
     }
 
     @Override

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/deobfuscation/ActionDeobfuscator.java

@@ -257,13 +257,19 @@ public class ActionDeobfuscator extends ActionDeobfuscatorSimple {
                 }
 
                 if (action instanceof ActionDefineLocal) {
-                    GraphTargetItem top = stack.pop();
-                    String variableName = stack.peek().getResult().toString();
+                    if (stack.size() < 2) {
+                        return;
+                    }
+
+                    String variableName = stack.peek(2).getResult().toString();
                     result.defines.add(variableName);
-                    stack.push(top);
                 }
 
                 if (action instanceof ActionGetVariable) {
+                    if (stack.isEmpty()) {
+                        return;
+                    }
+
                     String variableName = stack.peek().getResult().toString();
                     if (!localData.variables.containsKey(variableName)) {
                         break;
@@ -271,6 +277,10 @@ public class ActionDeobfuscator extends ActionDeobfuscatorSimple {
                 }
 
                 if (action instanceof ActionCallFunction) {
+                    if (stack.isEmpty()) {
+                        return;
+                    }
+
                     String functionName = stack.pop().getResult().toString();
                     long numArgs = EcmaScript.toUint32(stack.pop().getResult());
                     if (numArgs == 0) {
@@ -283,6 +293,12 @@ public class ActionDeobfuscator extends ActionDeobfuscatorSimple {
                         break;
                     }
                 } else {
+                    // do not throw EmptyStackException, much faster
+                    int requiredStackSize = action.getStackPopCount(localData, stack);
+                    if (stack.size() < requiredStackSize) {
+                        return;
+                    }
+
                     action.translate(localData, stack, output, Graph.SOP_USE_STATIC, "");
                 }
 
@@ -348,6 +364,10 @@ public class ActionDeobfuscator extends ActionDeobfuscatorSimple {
 
                 if (action instanceof ActionIf) {
                     ActionIf aif = (ActionIf) action;
+                    if (stack.isEmpty()) {
+                        return;
+                    }
+
                     if (EcmaScript.toBoolean(stack.pop().getResult())) {
                         long address = aif.getAddress() + aif.getTotalActionLength() + aif.getJumpOffset();
                         idx = actions.indexOf(actions.getByAddress(address));

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/deobfuscation/ActionDeobfuscatorSimple.java

@@ -291,6 +291,12 @@ public class ActionDeobfuscatorSimple implements SWFDecompilerListener {
                  System.out.print(" '" + stack.get(j).getResult() + "'");
                  }
                  System.out.println();*/
+                // do not throw EmptyStackException, much faster
+                int requiredStackSize = action.getStackPopCount(localData, stack);
+                if (stack.size() < requiredStackSize) {
+                    return;
+                }
+
                 action.translate(localData, stack, output, Graph.SOP_USE_STATIC, "");
 
                 if (!(action instanceof ActionPush
@@ -341,6 +347,10 @@ public class ActionDeobfuscatorSimple implements SWFDecompilerListener {
 
                 if (action instanceof ActionIf) {
                     ActionIf aif = (ActionIf) action;
+                    if (stack.isEmpty()) {
+                        return;
+                    }
+
                     if (EcmaScript.toBoolean(stack.pop().getResult())) {
                         long address = aif.getAddress() + aif.getTotalActionLength() + aif.getJumpOffset();
                         idx = actions.indexOf(actions.getByAddress(address));

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/flashlite/ActionFSCommand2.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.flashlite;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.FSCommand2ActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -44,4 +46,19 @@ public class ActionFSCommand2 extends Action {
         }
         stack.push(new FSCommand2ActionItem(this, command, args));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        int result = 2;
+        if (!stack.isEmpty()) {
+            result += stack.peek().getAsLong();
+        }
+
+        return result;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/special/ActionDeobfuscatePop.java

@@ -1,18 +1,19 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.special;
 
 import com.jpexs.decompiler.flash.BaseLocalData;
@@ -40,7 +41,8 @@ public class ActionDeobfuscatePop extends ActionPop {
         if (stack.isEmpty()) {
             return;
         }
-        GraphTargetItem val = stack.pop();
+
+        stack.pop(); //Just ignore the value
     }
 
     @Override

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionAdd.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.AddActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionAdd extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new AddActionItem(this, b, a, false));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionAnd.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.AndActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionAnd extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new AndActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionAsciiToChar.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.AsciiToCharActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionAsciiToChar extends Action {
         GraphTargetItem a = stack.pop();
         stack.push(new AsciiToCharActionItem(this, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionCall.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.CallActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -41,4 +43,9 @@ public class ActionCall extends Action {
     public void translate(TranslateStack stack, List<GraphTargetItem> output, HashMap<Integer, String> regNames, HashMap<String, GraphTargetItem> variables, HashMap<String, GraphTargetItem> functions, int staticOperation, String path) {
         output.add(new CallActionItem(this, stack.pop()));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionCharToAscii.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.CharToAsciiActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionCharToAscii extends Action {
         GraphTargetItem a = stack.pop();
         stack.push(new CharToAsciiActionItem(this, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionCloneSprite.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.CloneSpriteActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -40,4 +42,9 @@ public class ActionCloneSprite extends Action {
         GraphTargetItem target = stack.pop();
         output.add(new CloneSpriteActionItem(this, source, target, depth));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 3;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionDivide.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.DivideActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionDivide extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new DivideActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionEquals.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.EqActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionEquals extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new EqActionItem(this, b, a, false));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionGetProperty.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.DirectValueActionItem;
 import com.jpexs.decompiler.flash.action.model.GetPropertyActionItem;
@@ -51,4 +53,14 @@ public class ActionGetProperty extends Action {
         }
         stack.push(new GetPropertyActionItem(this, target, indexInt));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionGetTime.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.GetTimeActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -37,4 +39,9 @@ public class ActionGetTime extends Action {
     public void translate(TranslateStack stack, List<GraphTargetItem> output, HashMap<Integer, String> regNames, HashMap<String, GraphTargetItem> variables, HashMap<String, GraphTargetItem> functions, int staticOperation, String path) {
         stack.push(new GetTimeActionItem(this));
     }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionGetURL2.java

@@ -16,6 +16,7 @@
  */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.SWFInputStream;
 import com.jpexs.decompiler.flash.SWFOutputStream;
 import com.jpexs.decompiler.flash.action.Action;
@@ -161,4 +162,9 @@ public class ActionGetURL2 extends Action {
             }
         }
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionGetVariable.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.DirectValueActionItem;
 import com.jpexs.decompiler.flash.action.model.EvalActionItem;
@@ -51,4 +53,14 @@ public class ActionGetVariable extends Action {
             stack.push(gvt);
         }
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionGotoFrame2.java

@@ -16,6 +16,7 @@
  */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.SWFInputStream;
 import com.jpexs.decompiler.flash.SWFOutputStream;
 import com.jpexs.decompiler.flash.action.Action;
@@ -101,4 +102,9 @@ public class ActionGotoFrame2 extends Action {
         GraphTargetItem frame = stack.pop();
         output.add(new GotoFrame2ActionItem(this, frame, sceneBiasFlag, playFlag, sceneBias));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionLess.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.LtActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionLess extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new LtActionItem(this, b, a, false));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionMBAsciiToChar.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.MBAsciiToCharActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionMBAsciiToChar extends Action {
         GraphTargetItem a = stack.pop();
         stack.push(new MBAsciiToCharActionItem(this, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionMBCharToAscii.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.MBCharToAsciiActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionMBCharToAscii extends Action {
         GraphTargetItem a = stack.pop();
         stack.push(new MBCharToAsciiActionItem(this, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionMBStringExtract.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.MBStringExtractActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -40,4 +42,14 @@ public class ActionMBStringExtract extends Action {
         GraphTargetItem value = stack.pop();
         stack.push(new MBStringExtractActionItem(this, value, index, count));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 3;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionMBStringLength.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.MBStringLengthActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionMBStringLength extends Action {
         GraphTargetItem a = stack.pop();
         stack.push(new MBStringLengthActionItem(this, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionMultiply.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.MultiplyActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionMultiply extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new MultiplyActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionNot.java

@@ -16,6 +16,7 @@
  */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.graph.GraphTargetItem;
 import com.jpexs.decompiler.graph.TranslateStack;
@@ -38,4 +39,14 @@ public class ActionNot extends Action {
         GraphTargetItem a = stack.pop();
         stack.push(a.invert(this));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionOr.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.OrActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionOr extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new OrActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionPop.java

@@ -16,6 +16,7 @@
  */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.graph.GraphTargetItem;
 import com.jpexs.decompiler.graph.TranslateStack;
@@ -38,4 +39,9 @@ public class ActionPop extends Action {
         GraphTargetItem val = stack.pop();
         output.add(val);
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionPush.java

@@ -16,6 +16,7 @@
  */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.EndOfStreamException;
 import com.jpexs.decompiler.flash.SWF;
 import com.jpexs.decompiler.flash.SWFInputStream;
@@ -442,4 +443,9 @@ public class ActionPush extends Action {
             pos++;
         }
     }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return values.size();
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionRandomNumber.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.RandomNumberActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionRandomNumber extends Action {
         GraphTargetItem maximum = stack.pop();
         stack.push(new RandomNumberActionItem(this, maximum));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionRemoveSprite.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.RemoveSpriteActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,9 @@ public class ActionRemoveSprite extends Action {
         GraphTargetItem target = stack.pop();
         output.add(new RemoveSpriteActionItem(this, target));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionSetProperty.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.DecrementActionItem;
 import com.jpexs.decompiler.flash.action.model.DirectValueActionItem;
@@ -60,22 +62,18 @@ public class ActionSetProperty extends Action {
         }
         if (value.getThroughDuplicate() instanceof IncrementActionItem) {
             GraphTargetItem obj = ((IncrementActionItem) value).object;
-            if (!stack.isEmpty()) {
-                if (stack.peek().valueEquals(obj)) {
-                    stack.pop();
-                    stack.push(new PostIncrementActionItem(this, obj));
-                    return;
-                }
+            if (!stack.isEmpty() && stack.peek().valueEquals(obj)) {
+                stack.pop();
+                stack.push(new PostIncrementActionItem(this, obj));
+                return;
             }
         }
         if (value.getThroughDuplicate() instanceof DecrementActionItem) {
             GraphTargetItem obj = ((DecrementActionItem) value).object;
-            if (!stack.isEmpty()) {
-                if (stack.peek().valueEquals(obj)) {
-                    stack.pop();
-                    stack.push(new PostDecrementActionItem(this, obj));
-                    return;
-                }
+            if (!stack.isEmpty() && stack.peek().valueEquals(obj)) {
+                stack.pop();
+                stack.push(new PostDecrementActionItem(this, obj));
+                return;
             }
         }
 
@@ -108,4 +106,9 @@ public class ActionSetProperty extends Action {
         }
         output.add(ret);
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 3;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionSetTarget2.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.SetTarget2ActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,9 @@ public class ActionSetTarget2 extends Action {
         GraphTargetItem target = stack.pop();
         output.add(new SetTarget2ActionItem(this, target));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionSetVariable.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.StoreTypeAction;
 import com.jpexs.decompiler.flash.action.model.ConstantPool;
@@ -52,22 +54,18 @@ public class ActionSetVariable extends Action implements StoreTypeAction {
         variables.put(name.toStringNoQuotes(LocalData.empty), value);
         if (value instanceof IncrementActionItem) {
             GraphTargetItem obj = ((IncrementActionItem) value).object;
-            if (!stack.isEmpty()) {
-                if (stack.peek().valueEquals(obj)) {
-                    stack.pop();
-                    stack.push(new PostIncrementActionItem(this, obj));
-                    return;
-                }
+            if (!stack.isEmpty() && stack.peek().valueEquals(obj)) {
+                stack.pop();
+                stack.push(new PostIncrementActionItem(this, obj));
+                return;
             }
         }
         if (value instanceof DecrementActionItem) {
             GraphTargetItem obj = ((DecrementActionItem) value).object;
-            if (!stack.isEmpty()) {
-                if (stack.peek().valueEquals(obj)) {
-                    stack.pop();
-                    stack.push(new PostDecrementActionItem(this, obj));
-                    return;
-                }
+            if (!stack.isEmpty() && stack.peek().valueEquals(obj)) {
+                stack.pop();
+                stack.push(new PostDecrementActionItem(this, obj));
+                return;
             }
         }
         if (value instanceof IncrementActionItem) {
@@ -119,6 +117,11 @@ public class ActionSetVariable extends Action implements StoreTypeAction {
         output.add(ret);
     }
 
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
     @Override
     public String getVariableName(TranslateStack stack, ConstantPool cpool) {
         if (stack.size() < 2) {

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionStartDrag.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.DirectValueActionItem;
 import com.jpexs.decompiler.flash.action.model.StartDragActionItem;
@@ -47,6 +49,7 @@ public class ActionStartDrag extends Action {
                 hasConstrains = false;
             }
         }
+
         GraphTargetItem x1 = null;
         GraphTargetItem y1 = null;
         GraphTargetItem x2 = null;
@@ -57,6 +60,25 @@ public class ActionStartDrag extends Action {
             y1 = stack.pop();
             x1 = stack.pop();
         }
+
         output.add(new StartDragActionItem(this, target, lockCenter, constrain, x1, y1, x2, y2));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        if (stack.size() >= 3) {
+            GraphTargetItem constrain = stack.peek(3);
+            boolean hasConstrains = true;
+            if (constrain instanceof DirectValueActionItem) {
+                if (Double.compare(EcmaScript.toNumber(constrain.getResult()), 0) == 0) {
+                    hasConstrains = false;
+                }
+            }
+            if (hasConstrains) {
+                return 7;
+            }
+        }
+
+        return 3;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionStringAdd.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.StringAddActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionStringAdd extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new StringAddActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionStringEquals.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.StringEqActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionStringEquals extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new StringEqActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionStringExtract.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.StringExtractActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -40,4 +42,14 @@ public class ActionStringExtract extends Action {
         GraphTargetItem value = stack.pop();
         stack.push(new StringExtractActionItem(this, value, index, count));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 3;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionStringLength.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.StringLengthActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionStringLength extends Action {
         GraphTargetItem a = stack.pop();
         stack.push(new StringLengthActionItem(this, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionStringLess.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.StringLtActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionStringLess extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new StringLtActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionSubtract.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.SubtractActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionSubtract extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new SubtractActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionToInteger.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.ToIntegerActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionToInteger extends Action {
         GraphTargetItem a = stack.pop();
         stack.push(new ToIntegerActionItem(this, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionTrace.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.TraceActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,9 @@ public class ActionTrace extends Action {
         GraphTargetItem value = stack.pop();
         output.add(new TraceActionItem(this, value));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf4/ActionWaitForFrame2.java

@@ -16,6 +16,7 @@
  */
 package com.jpexs.decompiler.flash.action.swf4;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.SWF;
 import com.jpexs.decompiler.flash.SWFInputStream;
 import com.jpexs.decompiler.flash.SWFOutputStream;
@@ -136,4 +137,9 @@ public class ActionWaitForFrame2 extends Action implements ActionStore {
         List<GraphTargetItem> body = ActionGraph.translateViaGraph(regNames, variables, functions, skipped, SWF.DEFAULT_VERSION, staticOperation, path);
         output.add(new IfFrameLoadedActionItem(frame, body, this));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionAdd2.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.AddActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionAdd2 extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new AddActionItem(this, b, a, true));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionBitAnd.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.BitAndActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionBitAnd extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new BitAndActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionBitLShift.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.LShiftActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionBitLShift extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new LShiftActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionBitOr.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.BitOrActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionBitOr extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new BitOrActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionBitRShift.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.RShiftActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionBitRShift extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new RShiftActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionBitURShift.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.URShiftActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionBitURShift extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new URShiftActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionBitXor.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.BitXorActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionBitXor extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new BitXorActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionCallFunction.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.CallFunctionActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -47,4 +49,19 @@ public class ActionCallFunction extends Action {
         cft.calculatedFunction = functions.get(functionName.toStringNoQuotes(LocalData.empty));
         stack.push(cft);
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        int result = 2;
+        if (stack.size() >= 2) {
+            result += stack.peek(2).getAsLong();
+        }
+
+        return result;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionCallMethod.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.CallMethodActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -45,4 +47,19 @@ public class ActionCallMethod extends Action {
         }
         stack.push(new CallMethodActionItem(this, scriptObject, methodName, args));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        int result = 3;
+        if (stack.size() >= 3) {
+            result += stack.peek(3).getAsLong();
+        }
+
+        return result;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionDecrement.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.DecrementActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionDecrement extends Action {
         GraphTargetItem a = stack.pop();
         stack.push(new DecrementActionItem(this, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionDefineLocal.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.DefineLocalActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -41,4 +43,9 @@ public class ActionDefineLocal extends Action {
         variables.put(name.toStringNoQuotes(LocalData.empty), value);
         output.add(new DefineLocalActionItem(this, name, value));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionDefineLocal2.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.DefineLocalActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,9 @@ public class ActionDefineLocal2 extends Action {
         GraphTargetItem name = stack.pop();
         output.add(new DefineLocalActionItem(this, name, null));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionDelete.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.DeleteActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -40,4 +42,14 @@ public class ActionDelete extends Action {
 
         stack.push(new DeleteActionItem(this, object, propertyName));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionDelete2.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.DeleteActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionDelete2 extends Action {
 
         stack.push(new DeleteActionItem(this, null, propertyName));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionEnumerate.java

@@ -16,6 +16,7 @@
  */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.EnumerateActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -40,4 +41,9 @@ public class ActionEnumerate extends Action {
         //stack.push(new DirectValueActionItem(null, 0, new Null(), new ArrayList<String>()));
         output.add(new EnumerateActionItem(this, object));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionEquals2.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.EqActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionEquals2 extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new EqActionItem(this, b, a, true));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionGetMember.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.GetMemberActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionGetMember extends Action {
         GraphTargetItem object = stack.pop();
         stack.push(new GetMemberActionItem(this, object, functionName));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionIncrement.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.IncrementActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionIncrement extends Action {
         GraphTargetItem a = stack.pop();
         stack.push(new IncrementActionItem(this, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionInitArray.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.InitArrayActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,6 +41,21 @@ public class ActionInitArray extends Action {
         stack.push(new InitArrayActionItem(this, args));
     }
 
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        int result = 1;
+        if (!stack.isEmpty()) {
+            result += stack.peek().getAsLong();
+        }
+
+        return result;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
     @Override
     public String toString() {
         return "InitArray";

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionInitObject.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.InitObjectActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -45,4 +47,19 @@ public class ActionInitObject extends Action {
         }
         stack.push(new InitObjectActionItem(this, names, values));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        int result = 1;
+        if (!stack.isEmpty()) {
+            result += 2 * stack.peek().getAsLong();
+        }
+
+        return result;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionLess2.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.LtActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionLess2 extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new LtActionItem(this, b, a, true));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionModulo.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.ModuloActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionModulo extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new ModuloActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionNewMethod.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.NewMethodActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -45,4 +47,19 @@ public class ActionNewMethod extends Action {
         }
         stack.push(new NewMethodActionItem(this, scriptObject, methodName, args));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        int result = 3;
+        if (stack.size() >= 3) {
+            result += stack.peek(3).getAsLong();
+        }
+
+        return result;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionNewObject.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.NewObjectActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -44,4 +46,19 @@ public class ActionNewObject extends Action {
         }
         stack.push(new NewObjectActionItem(this, objectName, args));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        int result = 2;
+        if (stack.size() >= 2) {
+            result += stack.peek(2).getAsLong();
+        }
+
+        return result;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionPushDuplicate.java

@@ -16,6 +16,7 @@
  */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.graph.GraphSourceItemPos;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -41,4 +42,14 @@ public class ActionPushDuplicate extends Action {
         stack.push(new DuplicateItem(this, value));
         value.getMoreSrc().add(new GraphSourceItemPos(this, 0));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionReturn.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.ReturnActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,6 +41,11 @@ public class ActionReturn extends Action {
         output.add(new ReturnActionItem(this, value));
     }
 
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
     @Override
     public boolean isExit() {
         return true;

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionSetMember.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.DecrementActionItem;
 import com.jpexs.decompiler.flash.action.model.GetMemberActionItem;
@@ -49,22 +51,18 @@ public class ActionSetMember extends Action {
         GraphTargetItem object = stack.pop();
         if (value instanceof IncrementActionItem) {
             GraphTargetItem obj = ((IncrementActionItem) value).object;
-            if (!stack.isEmpty()) {
-                if (stack.peek().valueEquals(obj)) {
-                    stack.pop();
-                    stack.push(new PostIncrementActionItem(this, obj));
-                    return;
-                }
+            if (!stack.isEmpty() && stack.peek().valueEquals(obj)) {
+                stack.pop();
+                stack.push(new PostIncrementActionItem(this, obj));
+                return;
             }
         }
         if (value instanceof DecrementActionItem) {
             GraphTargetItem obj = ((DecrementActionItem) value).object;
-            if (!stack.isEmpty()) {
-                if (stack.peek().valueEquals(obj)) {
-                    stack.pop();
-                    stack.push(new PostDecrementActionItem(this, obj));
-                    return;
-                }
+            if (!stack.isEmpty() && stack.peek().valueEquals(obj)) {
+                stack.pop();
+                stack.push(new PostDecrementActionItem(this, obj));
+                return;
             }
         }
 
@@ -116,4 +114,9 @@ public class ActionSetMember extends Action {
         }
         output.add(ret);
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 3;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionStackSwap.java

@@ -16,6 +16,7 @@
  */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.graph.GraphSourceItemPos;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -43,4 +44,14 @@ public class ActionStackSwap extends Action {
         a.getMoreSrc().add(new GraphSourceItemPos(this, 0));
         b.getMoreSrc().add(new GraphSourceItemPos(this, 0));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionStoreRegister.java

@@ -16,6 +16,7 @@
  */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.SWFInputStream;
 import com.jpexs.decompiler.flash.SWFOutputStream;
 import com.jpexs.decompiler.flash.action.Action;
@@ -112,29 +113,35 @@ public class ActionStoreRegister extends Action implements StoreTypeAction {
 
         if (value instanceof IncrementActionItem) {
             GraphTargetItem obj = ((IncrementActionItem) value).object;
-            if (!stack.isEmpty()) {
-                if (stack.peek().valueEquals(obj)) {
-                    stack.pop();
-                    stack.push(new PostIncrementActionItem(this, obj));
-                    stack.push(obj);
-                    return;
-                }
+            if (!stack.isEmpty() && stack.peek().valueEquals(obj)) {
+                stack.pop();
+                stack.push(new PostIncrementActionItem(this, obj));
+                stack.push(obj);
+                return;
             }
         }
         if (value instanceof DecrementActionItem) {
             GraphTargetItem obj = ((DecrementActionItem) value).object;
-            if (!stack.isEmpty()) {
-                if (stack.peek().valueEquals(obj)) {
-                    stack.pop();
-                    stack.push(new PostDecrementActionItem(this, obj));
-                    stack.push(obj);
-                    return;
-                }
+            if (!stack.isEmpty() && stack.peek().valueEquals(obj)) {
+                stack.pop();
+                stack.push(new PostDecrementActionItem(this, obj));
+                stack.push(obj);
+                return;
             }
         }
         stack.push(new StoreRegisterActionItem(this, rn, value, define));
     }
 
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
     @Override
     public String getVariableName(TranslateStack stack, ConstantPool cpool) {
         return "__register" + registerNumber;

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionTargetPath.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.TargetPathActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionTargetPath extends Action {
         GraphTargetItem object = stack.pop();
         stack.push(new TargetPathActionItem(this, object));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionToNumber.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.ToNumberActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionToNumber extends Action {
         GraphTargetItem object = stack.pop();
         stack.push(new ToNumberActionItem(this, object));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionToString.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.ToStringActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionToString extends Action {
         GraphTargetItem object = stack.pop();
         stack.push(new ToStringActionItem(this, object));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionTypeOf.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf5;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.TypeOfActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -38,4 +40,14 @@ public class ActionTypeOf extends Action {
         GraphTargetItem object = stack.pop();
         stack.push(new TypeOfActionItem(this, object));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf6/ActionEnumerate2.java

@@ -1,21 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library.
  */
 package com.jpexs.decompiler.flash.action.swf6;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.EnumerateActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +40,9 @@ public class ActionEnumerate2 extends Action {
         GraphTargetItem object = stack.pop();
         output.add(new EnumerateActionItem(this, object));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf6/ActionGreater.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf6;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.GtActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionGreater extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new GtActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf6/ActionInstanceOf.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.␍ */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf6;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.InstanceOfActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionInstanceOf extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new InstanceOfActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf6/ActionStrictEquals.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.
 */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf6;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.StrictEqActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionStrictEquals extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new StrictEqActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf6/ActionStringGreater.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.
 */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf6;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.operations.StringGtActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionStringGreater extends Action {
         GraphTargetItem b = stack.pop();
         stack.push(new StringGtActionItem(this, b, a));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf7/ActionCastOp.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.
 */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf7;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.CastOpActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,14 @@ public class ActionCastOp extends Action {
         GraphTargetItem constructor = stack.pop();
         stack.push(new CastOpActionItem(this, constructor, object));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
+
+    @Override
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf7/ActionExtends.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.
 */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf7;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.ExtendsActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,4 +41,9 @@ public class ActionExtends extends Action {
         GraphTargetItem subclass = stack.pop();
         output.add(new ExtendsActionItem(this, subclass, superclass));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 2;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf7/ActionImplementsOp.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.
 */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf7;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.ImplementsOpActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -44,4 +46,14 @@ public class ActionImplementsOp extends Action {
         }
         output.add(new ImplementsOpActionItem(this, subclass, superclasses));
     }
+
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        int result = 2;
+        if (stack.size() >= 2) {
+            result += stack.peek(2).getAsLong();
+        }
+
+        return result;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf7/ActionThrow.java

@@ -1,20 +1,22 @@
 /*
  *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library.
 */
+ * License along with this library.
+ */
 package com.jpexs.decompiler.flash.action.swf7;
 
+import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.model.ThrowActionItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -39,6 +41,11 @@ public class ActionThrow extends Action {
         output.add(new ThrowActionItem(this, object));
     }
 
+    @Override
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack) {
+        return 1;
+    }
+
     @Override
     public boolean isExit() {
         return true;

libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/GraphSourceItem.java

@@ -25,6 +25,10 @@ public interface GraphSourceItem extends Serializable, Cloneable {
 
     public void translate(BaseLocalData localData, TranslateStack stack, List<GraphTargetItem> output, int staticOperation, String path) throws InterruptedException;
 
+    public int getStackPopCount(BaseLocalData localData, TranslateStack stack);
+
+    public int getStackPushCount(BaseLocalData localData, TranslateStack stack);
+
     public boolean isJump();
 
     public boolean isBranch();

libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/GraphTargetItem.java

@@ -17,6 +17,7 @@
 package com.jpexs.decompiler.graph;
 
 import com.jpexs.decompiler.flash.SourceGeneratorLocalData;
+import com.jpexs.decompiler.flash.action.model.DirectValueActionItem;
 import com.jpexs.decompiler.flash.configuration.Configuration;
 import com.jpexs.decompiler.flash.helpers.GraphTextWriter;
 import com.jpexs.decompiler.flash.helpers.HighlightedTextWriter;
@@ -375,4 +376,15 @@ public abstract class GraphTargetItem implements Serializable, Cloneable {
         writer.endBlock();
         return writer;
     }
+
+    public long getAsLong() {
+        if (this instanceof DirectValueActionItem) {
+            DirectValueActionItem dvai = (DirectValueActionItem) this;
+            if (dvai.value instanceof Long) {
+                return (long) (Long) dvai.value;
+            }
+        }
+
+        return 0;
+    }
 }

libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/TranslateStack.java

@@ -69,6 +69,16 @@ public class TranslateStack extends Stack<GraphTargetItem> {
         return super.peek();
     }
 
+    public synchronized GraphTargetItem peek(int index) {
+        if (path != null) {
+            if (index > this.size()) {
+                Logger.getLogger(TranslateStack.class.getName()).log(Level.FINE, "{0}: Attemp to Peek item from stack", path);
+                return getPop();
+            }
+        }
+        return super.get(size() - index);
+    }
+
     @Override
     public synchronized GraphTargetItem pop() {
         if (path != null) {