HashData
extern NCURSES_EXPORT(const HashData *) _nc_get_hash_info (bool);
NCURSES_EXPORT(const HashData *) _nc_get_hash_user (void);
const HashData *data = _nc_get_hash_info(termcap);
const HashData *data = _nc_get_hash_user();
const HashData *data = _nc_get_hash_info(termcap);