ldterm_utf8_width
*readp = ldterm_utf8_width(u8, i);
*ip = ldterm_utf8_width(u8_2, len);
*ip = ldterm_utf8_width(
ldterm_utf8_width(
static uchar_t ldterm_utf8_width(uchar_t *, int);
*p = ldterm_utf8_width(u8, len);