also, it's a series of if/else if/else if/else if

that would have been better structured as a switch, for a start, for the clarity of the top level

there is three cases if i remember correctly, where two go to two options and one goes to three

some comments explaining the reason why this order of actions would have helped a lot

i will explain it, just as i have also explained the binary formatting of your code in other work

and i won't thank you because decoding bad code is harder than writing it.