/#define sam_itr_next(htsfp, itr, r) hts_itr_next((htsfp)->fp.bgzf, (itr), (r), (htsfp))
See Implementation
/#define sam_itr_next(htsfp, itr, r) hts_itr_next((htsfp)->fp.bgzf, (itr), (r), (htsfp))