%!PS

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

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


% end included library code

/popcount32 {
    0 dict begin
    /M1  16#55555555 def
    /M2  16#33333333 def
    /M4  16#0f0f0f0f def
    /H01 16#01010101 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 -24 bitshift
    end
} bind def

/hammingdistance {
    0 dict begin
    /a exch def
    0
    0 1 a length 2 sub {
        /i exch def
        i 1 add 1 a length 1 sub {
            /j exch def
            a i get a j get xor popcount32 add
        } for
    } for
    end
} bind def

(hammingdistance) test.start
[4 14 2] hammingdistance 6 eq test
[4 14 4] hammingdistance 4 eq test
test.end