%!PS

% begin included library code
% see https://codeberg.org/Firedrake/postscript-libraries/
/map { % array proc -> array
    2 dict begin
    /p exch def
    [ exch
      {
          p
      } forall
    ]
    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

/reduce { % array proc -> value
    2 dict begin
    /p exch def
    /a exch def
    a 0 get
    1 1 a length 1 sub {
        a exch get
        p
    } for
    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

/filter { % array proc(bool) -> array
    1 dict begin
    /p exch def
    [ exch
      {
          dup p not
          {
              pop
          } if
      } forall
    ]
    end
} bind def

/test.start {
    print (:) print
    /test.pass 0 def
    /test.count 0 def
} bind def


% end included library code

/popcount64 {
    0 dict begin
    /M1  16#5555555555555555 def
    /M2  16#3333333333333333 def
    /M4  16#0f0f0f0f0f0f0f0f def
    /H01 16#0101010101010101 def
    /x exch def
    /x x x -1 bitshift M1 and sub def
    /x x M2 and x -2 bitshift M2 and add def
    /x x x -4 bitshift add M4 and def
    x H01 mul -56 bitshift
    end
} bind def

/sumofvalues {
    0 dict begin
    /k exch def
    /a exch def
    [ 0 1 a length 1 sub { } for ]
    { popcount64 k eq } filter
    { a exch get } map
    { add } reduce
    end
} bind def

(sumofvalues) test.start
[2 5 9 11 3] 1 sumofvalues 17 eq test
[2 5 9 11 3] 2 sumofvalues 11 eq test
[2 5 9 11 3] 0 sumofvalues 2 eq test
test.end