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 /*

  * Copyright 2011 Google Inc.

  *

  * Use of this source code is governed by a BSD-style license that can be

  * found in the LICENSE file.

  */

 #ifndef SkScriptRuntime_DEFINED

 #define SkScriptRuntime_DEFINED

 #include "SkOperand2.h"

 #include "SkTDArray_Experimental.h"

 #include "SkTDStack.h"

 class SkScriptCallBack;

 typedef SkLongArray(SkString*) SkTDStringArray;

 typedef SkLongArray(SkScriptCallBack*) SkTDScriptCallBackArray;

 class SkScriptRuntime {

 public:

     enum SkError {

         kNoError,

         kArrayIndexOutOfBounds,

         kCouldNotFindReferencedID,

         kFunctionCallFailed,

         kMemberOpFailed,

         kPropertyOpFailed

     };

     SkScriptRuntime(SkTDScriptCallBackArray& callBackArray) : fCallBackArray(callBackArray)

         {  }

     ~SkScriptRuntime();

     bool executeTokens(unsigned char* opCode);

     bool getResult(SkOperand2* result);

     void untrack(SkOpArray* array);

     void untrack(SkString* string);

 private:

     void track(SkOpArray* array);

     void track(SkString* string);

     SkTDScriptCallBackArray& fCallBackArray;

     SkError fError;

     SkTDStack<SkOperand2> fRunStack;

     SkLongArray(SkOpArray*) fTrackArray;

     SkTDStringArray fTrackString;

     // illegal

     SkScriptRuntime& operator=(const SkScriptRuntime&);

 };

 #endif // SkScriptRuntime_DEFINED