ndr__mbstowcs
slen = ndr__mbstowcs(NULL, s, NDR_STRING_MAX);
slen = ndr__mbstowcs(NULL, s, NDR_STRING_MAX);
(void) ndr__mbstowcs(vc->vcs->buffer, s, slen + 1);
wlen = ndr__mbstowcs(NULL, valp, NDR_STRING_MAX);
wlen = ndr__mbstowcs(wcs, valp, NDR_STRING_MAX);
len = ndr__mbstowcs(wcs, mbs, nwchars);
size_t ndr__mbstowcs(uint16_t *, const char *, size_t);