%!PS

% begin included library code
% see https://codeberg.org/Firedrake/postscript-libraries/
/test.start {
    print (:) print
    /test.pass 0 def
    /test.count 0 def
} bind def

/test {
    /test.count test.count 1 add def
    {
        /test.pass test.pass 1 add def
    } {
        ( ) print
        test.count (....) cvs print
        (-fail) print
    } ifelse
} bind def

/test.end {
    ( ) print
    test.count 0 gt {
        (Passed ) print
        test.pass (...) cvs print
        (/) print
        test.count (...) cvs print
        ( \() print
        test.pass 100 mul test.count idiv (...) cvs print
        (%\)) print
        (\r\n) print
    } if
} bind def

/s2a {
    [ exch { } forall ]
} bind def


% end included library code

/cs2xy {
    [ exch
      s2a aload pop
      (1) s2a aload pop sub
      exch
      (a) s2a aload pop sub
      exch
    ]
} bind def

/checkcolor {
    cs2xy aload pop
    add 2 mod 1 eq
} bind def

(checkcolor) test.start
(d3) checkcolor test
(g5) checkcolor not test
(e6) checkcolor test
test.end