Re: File header size in Bytes
if you want to get information from a file, you will need more information than just the size of the header. you will need to know where it puts the information want. maybe you want to collect the frequency count for each letter and word in the document. to do something like that, you will need to know a lot more than what byte offset you need to get past the header. you'll need to know how to uncompress it. you will also need to know how it interleaves the formatting and positioning of the letters and words.
i cannot imagine any end goal that only needs to know the size of the header than can work for more than a small handful of file types.
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