_yconv
static char * _yconv(int, int, bool, bool, char *, const char *, locale_t);
pt = _yconv(t->tm_year, TM_YEAR_BASE,
pt = _yconv(year, base,
} else pt = _yconv(year, base,
pt = _yconv(t->tm_year, TM_YEAR_BASE,
pt = _yconv(t->tm_year, TM_YEAR_BASE,