1550     const intern_type* fend = frm;  in do_out()  local
1551     for (; fend != frm_end; ++fend)  in do_out()
1552         if (*fend == 0)  in do_out()
1560         size_t n = __libcpp_wcsnrtombs_l(to, &frm_nxt, static_cast<size_t>(fend-frm),  in do_out()
1580         if (fend != frm_end)  // set up next null terminated sequence  in do_out()
1593             for (fend = frm_nxt; fend != frm_end; ++fend)  in do_out()
1594                 if (*fend == 0)  in do_out()
1607     const extern_type* fend = frm;  in do_in()  local
1608     for (; fend != frm_end; ++fend)  in do_in()
1609         if (*fend == 0)  in do_in()
1617         size_t n = __libcpp_mbsnrtowcs_l(to, &frm_nxt, static_cast<size_t>(fend-frm),  in do_in()
1624                 n = __libcpp_mbrtowc_l(to_nxt, frm, static_cast<size_t>(fend-frm),  in do_in()
1650         if (fend != frm_end)  // set up next null terminated sequence  in do_in()
1659             for (fend = frm_nxt; fend != frm_end; ++fend)  in do_in()
1660                 if (*fend == 0)  in do_in()