%!PS

% begin included library code
% see https://codeberg.org/Firedrake/postscript-libraries/
/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

/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


% end included library code

/specialquads {
    5 dict begin
    /l exch def
    0
    0 1 l length 4 sub {
        /ai exch def
        ai 1 add 1 l length 3 sub {
            /bi exch def
            bi 1 add 1 l length 2 sub {
                /ci exch def
                ci 1 add 1 l length 1 sub {
                    /di exch def
                    l ai get l bi get add l ci get add l di get eq {
                        1 add
                    } if
                } for
            } for
        } for
    } for
    end
} bind def

(specialquads) test.start
[1 2 3 6] specialquads 1 eq test
[1 1 1 3 5] specialquads 4 eq test
[3 3 6 4 5] specialquads 0 eq test
test.end