Question: How can I do this?
I want to implement zip64 extra field of central_dir_entry but 64 bit fields appears in file only on 32 bit field equivalent overflow.
![image](https://user-images.githubusercontent.com/92798609/180436811-3764d8fe-60c1-4268-a073-ba765d78c79a.png)
I added this but obviously its not working, because i can't determine what field is overflowed

p.s. english not my native language. So feel free to ask any questions if something is unclear