mbrlen
size_t mbrlen(const char * __restrict, size_t, mbstate_t * __restrict);
ps = &locale->mbrlen;
__mbstate_t mbrlen;
charlen = mbrlen(buf, len, &lenstate);
nconv = mbrlen(p, MB_CUR_MAX, &mbs);
n = mbrlen(r, MB_LEN_MAX, &mbs);
if ((clen = mbrlen(lbuf, lbuflen, &mbs)) < 0) {
clen = mbrlen(optarg, MB_CUR_MAX, NULL);
clen = mbrlen(optarg + delim1len,
oclen = mbrlen(op, MB_LEN_MAX, &mbs1);
nclen = mbrlen(np, MB_LEN_MAX, &mbs2);
charlen = mbrlen(s + cptr, n, &mbs);