%!PS

% begin included library code
% see https://codeberg.org/Firedrake/postscript-libraries/
/a2s {
    2 dict begin
    /i exch def
    i length dup string /o exch def
    1 sub 0 exch 1 exch {
        dup i 3 -1 roll get o 3 1 roll put
    } for
    o
    end
} bind def



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

/strconcat % (a) (b) -> (ab)  
{
    [
        3 -1 roll
        s2a aload length
        2 add -1 roll
        s2a aload pop
    ] a2s
} bind def

/tolower {
    s2a
    [ exch
      {
          dup dup 65 ge exch 90 le and {
              32 add
          } if
      } forall
    ] a2s
} 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.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

/s2a {
    [ exch { } forall ]
} 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

/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


% end included library code

/titlecapital {
    0 dict begin
    [ exch
      ( ) strsplit
      {
          tolower
          dup length 2 gt {
              s2a /c exch def
              c 0 c 0 get 223 and put
              c a2s
          } if
      } forall
    ] ( ) strjoin
    end
} bind def

(titlecapital) test.start
(PERL IS gREAT) titlecapital (Perl is Great) eq test
(THE weekly challenge) titlecapital (The Weekly Challenge) eq test
(YoU ARE A stAR) titlecapital (You Are a Star) eq test
test.end