mbsrtowcs_l
size_t mbsrtowcs_l(wchar_t * __restrict,
return mbsrtowcs_l(dst, src, len, ps, __get_locale());
n = mbsrtowcs_l(wcs, &dstp, maxsize, &mbs, locale);
nwc = mbsrtowcs_l(s, (const char **)&mbp, n, &mbs, locale);
if ((mbsrtowcs_l(w1, &cs1, sz1, &mbs1, locale)) == (size_t)-1)
if ((mbsrtowcs_l(w2, &cs2, sz2, &mbs2, locale)) == (size_t)-1)