%!PS

% begin included library code
% see https://github.com/Firedrake/postscript-libraries/
/strconcat % (a) (b) -> (ab)  
{ exch dup length
  2 index length add string
  dup dup 4 2 roll copy length
  4 -1 roll putinterval
} bind def

/deepeq {
    2 dict begin
    /a exch def
    /b exch def
    a type b type eq {
        a type /dicttype eq {
            a length b length eq {
                <<
                    a {
                        pop
                        true
                    } forall
                    b {
                        pop
                        true
                    } forall
                >>
                true exch
                {
                    pop
                    dup a exch known {
                        dup b exch known {
                            dup a exch get exch b exch get deepeq not {
                                pop false
                            } if
                        } {
                            false
                        } ifelse
                    } {
                        false
                    } ifelse
                } forall
            } {
                false
            } ifelse
        } {
            a type dup /arraytype eq exch /stringtype eq or {
                a length b length eq {
                    true
                    0 1 a length 1 sub {
                        dup a exch get exch b exch get deepeq not {
                            pop false
                            exit
                        } if
                    } for
                } {
                    false
                } ifelse
            } {
                a b eq
            } ifelse
        } ifelse
    } {
        false
    } ifelse
    end
} bind def

/apush.left { % [b c] a -> [a b c]
    exch % a [b c]
    [ 3 1 roll aload pop ]
} 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.start {
    print (:) print
    /test.pass 0 def
    /test.count 0 def
} bind def

/strjoin % [(a) (b) (c)] (j) -> (ajbjc)
{
    3 dict begin
    /j exch def
    dup 0 get /out exch def
    /first true def
    {
        first {
            pop
            /first false def
        } {
            out j strconcat
            exch strconcat
            /out exch def
        } ifelse
    } forall
    out
    end
} 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

/map { % array proc -> array
    2 dict begin
    /p exch def
    [ exch
      {
          p
      } forall
    ]
} bind def


% end included library code

% from https://www.rosettacode.org/wiki/Reverse_a_string#PostScript

/reverse {
    3 dict begin
    /str exch def
    /temp str 0 get def
    /i 0 def
    str length 2 idiv {
        /temp str i get def
        str i str str length i sub 1 sub get put
        str str length i sub 1 sub temp put
        /i i 1 add def
    } repeat
    str
    end
} bind def

/r2qi {
    0 c2qi
} bind def

/c2qi {
    7 dict begin
    /i0 exch def
    /r0 exch def
    /l [
        [ i0 r0 ] {
            /n exch def
            [
                {
                    n 0 eq {
                        exit
                    } if
                    /digit n -4 mod def
                    /n n -4 idiv def
                    digit 0 lt {
                        /digit digit 4 add def
                        /n n 1 add def
                    } if
                    digit
                } loop
            ]
        } forall
    ] def
    /ld l 0 get length l 1 get length sub def
    ld 0 lt {
        ld neg 1 sub {
            l 0 l 0 get 0 apush.left put
        } repeat
    } if
    ld 1 gt {
        ld {
            l 1 l 1 get 0 apush.left put
        } repeat
    } if
    [
        l 1 get length 1 sub -1 0 {
            /i exch def
            [ 0 1 ] {
                /b exch def
                l b get length i gt {
                    l b get i get
                } if
            } forall
        } for
    ] { 1 string cvs dup length string cvs } map 0 string strjoin
    end
} bind def

/qi2r {
    qi2c 0 get
} bind def

/qi2c {
    4 dict begin
    /pow 1 def
    /ri 0 def
    /o [ 0 0 ] def
    reverse {
        /ch 1 string def
        ch exch 0 exch put ch cvi pow mul
        o ri get add
        o ri 3 -1 roll put
        /ri ri 1 add def
        /pow pow 2 mul def
        ri 2 eq {
            /ri 0 def
            /pow pow neg def
        } if
    } forall
    o
    end
} bind def

(qi) test.start
4 r2qi (10300) deepeq test
(10300) qi2r 4 eq test
test.end