MODULE editor2;

(* based on the kilo editor building course*)

(* Step 6 *)

IMPORT IO, termios, FIO, libc ;

VAR 
    c           : CHAR;
    theTermios  : termios.TERMIOS;
    TCSAFLUSH   : INTEGER;

    PROCEDURE disablerawMode() : INTEGER;

        VAR
            result : INTEGER;
    BEGIN
        IO.BufferedMode(0,TRUE);
        IO.BufferedMode(1,TRUE);
        result := termios.tcsetattr(FIO.StdIn, TCSAFLUSH, theTermios);
        IF result = -1 THEN
            theTermios := termios.KillTermios(theTermios);
            HALT
        ELSE 
            RETURN result
        END;
    END disablerawMode;

    PROCEDURE enablerawMode;
    BEGIN
        libc.atexit(disablerawMode);
        theTermios := termios.InitTermios();
        IF termios.tcgetattr(FIO.StdIn, theTermios) = -1 THEN
            HALT
        END;

        IO.UnBufferedMode(0,TRUE);
        IO.UnBufferedMode(1,TRUE);
    END enablerawMode;


BEGIN
    TCSAFLUSH := termios.tcsflush (); 
    enablerawMode;
    LOOP
        IO.Read(c);
        IF c = "q" THEN
            EXIT
        END;
    END;
END editor2.