Function rust_htslib::htslib::vcf::bcf_update_format_string

pub unsafe extern fn bcf_update_format_string(hdr: *const bcf_hdr_t,
                                              line: *mut bcf1_t,
                                              key: *const c_char,
                                              values: *mut *const c_char,
                                              n: c_int)
                                              -> c_int