%!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

/strsplit % (ajbjc) (j) -> [ (a) (b) (c) ]
{
    1 dict begin
    /sep exch def
    [ exch
      {
          dup length 0 eq {
              pop
              exit
          } {
              sep search {
                  exch pop
                  dup length 0 eq {
                      pop
                  } {
                      exch
                  } ifelse
              } {
                  ()
              } ifelse
          } ifelse
      } loop
    ]
    end
} bind def

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


% end included library code

/hm2m {
    (:) strsplit
    aload pop
    cvi
    exch
    cvi
    60 mul
    add
} bind def

/converttime {
    0 dict begin
    hm2m /tgt exch def
    hm2m /src exch def
    tgt src lt {
        /tgt tgt 24 60 mul add def
    } if
    /delta tgt src sub def
    /oc 0 def
    [ 60 15 5 1 ] {
        /op exch def
        /oc oc delta op idiv add def
        /delta delta op mod def
    } forall
    oc
    end
} bind def

(converttime) test.start
(02:30) (02:45) converttime 1 eq test
(11:55) (12:15) converttime 2 eq test
(09:00) (13:00) converttime 4 eq test
(23:45) (00:30) converttime 3 eq test
(14:20) (15:25) converttime 2 eq test
test.end