Is there any way to tell where in the file the reader is ?

[JulianDicken]

Title basically is the question. I need a way to know where in the file the reader is. Ideally id want the file offset (in bytes) of the current record, as well as where that record "ends". I have not found a way of doing this with the high level record reader but I think I have found a way to do this with the lower level htslib module via the htslib::bgzf_utell function. With this function I do manage to get a buffer of the record's data out but I dont know how to decompress that buffer (if it is compressed that is, if it isn't I am getting garbage out).