Implement MxDSStreamingAction (#108)

* Implement MxDSStreamingAction

* Add remaining functions

* Use inline assignment operators

LEGO1/mxdsstreamingaction.h

@@ -0,0 +1,44 @@
+#ifndef MXDSSTREAMINGACTION_H
+#define MXDSSTREAMINGACTION_H
+
+#include "mxdsaction.h"
+
+class MxDSBuffer;
+
+// VTABLE 0x100dd088
+// SIZE 0xb4
+class MxDSStreamingAction : public MxDSAction
+{
+public:
+  MxDSStreamingAction(MxDSAction &p_dsAction, MxU32 p_offset);
+  MxDSStreamingAction(MxDSStreamingAction &p_dsStreamingAction);
+  virtual ~MxDSStreamingAction();
+
+  MxDSStreamingAction *CopyFrom(MxDSStreamingAction &p_dsStreamingAction);
+  MxDSStreamingAction &operator=(MxDSAction &p_dsAction) {
+    MxDSAction::operator=(p_dsAction);
+    return *this; 
+  }
+  MxDSStreamingAction &operator=(MxDSStreamingAction &p_dsStreamingAction) {
+    MxDSAction::operator=(p_dsStreamingAction);
+    return *this; 
+  }
+
+  virtual MxBool HasId(MxU32 p_objectId); // vtable+34;
+
+  MxResult Init();
+  void SetInternalAction(MxDSAction *p_dsAction);
+  void FUN_100CD2D0();
+
+private:
+  MxU32 m_unk94;
+  MxU32 m_bufferOffset;
+  MxS32 m_unk9c;
+  MxDSBuffer *m_unka0;
+  MxDSBuffer *m_unka4;
+  MxLong m_unka8;
+  undefined2 m_unkac;
+  MxDSAction *m_internalAction;
+};
+
+#endif // MXDSSTREAMINGACTION_H