%!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

/rotor {
    5 dict begin
    /delta exch def
    /size exch def
    dup length /len exch def
    /ar exch def
    /ix 0 def
    [
        {
            ix size add len gt {
                exit
            } if
            ar ix size getinterval
            /ix ix size delta add add def
        } loop
    ]
    end
} 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

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


% end included library code

/stringscore {
    0 exch
    s2a
    2 -1 rotor
    {
        aload pop sub abs add
    } forall
} bind def

(stringscore) test.start
(hello) stringscore 13 eq test
(perl) stringscore 30 eq test
(raku) stringscore 37 eq test
test.end