add virtual getSize method

diff --git a/Tag.h b/Tag.h
index 926c58a..0daf5d1 100644 (file)
--- a/Tag.h
+++ b/Tag.h
@@ -15,6 +15,7 @@ protected:
 public:
        TagType getType();
        int getId();
+       virtual int getSize() = 0;
        virtual void* getValue() = 0;
 
 private: