_CODE.SUCCESSFUL if reading is permitted else error [...] _CODE.SUCCESSFUL if reading is

given message (if [...] , else 0). In

an object. If all [...] versa: If any [...] _CODE.SUCCESSFUL if reading is

percent (if supported [...] , else always 0) In [...] .ERROR.NO_ERROR if no error

, else inactive [...] IOs flag if the

percent (if supported [...] , else always 0) In [...] .ERROR.NO_ERROR if no error

an object. If all [...] . Vice versa: If any [...] _CODE.SUCCESSFUL if writing is

_CODE.SUCCESSFUL if writing is permitted else error [...] _CODE.SUCCESSFUL if writing is

\mathbb{R}\) , if there [...] number of roots 0: If [...] -axis | 255: If line

RETURN: Returns 0 if [...] are equal, else !=0