au_to_data
au_uwrite(au_to_data(AUP_HEX, AUR_CHAR, len, so_faddr));
au_uwrite(au_to_data(AUP_HEX, AUR_BYTE, len, val));
token_t *au_to_data(char, char, char, char *);
extern token_t *au_to_data(char, char, char, char *);