#!/bin/tcsh -f

PARSE: 
   set Narg = $#
   set cnt = 1
   if ("$1" == '') goto HELP

   while ($cnt <= $Narg)
      set donext = 1;
      
      if ($donext && "$argv[$cnt]" == "-help" || "$argv[$cnt]" == "-h") then
         goto HELP
      endif
       
      @ cnt ++
   end

set f1 = $1
set f2 = $2

PROCESS:
   if ( ! -f $f1 && ! -f $f2 ) then 
      #consider them of the same time
      echo 0
   else if ( ! -f $f1 && -f $f2 ) then
      #file 1 considered newer
      echo 1   
   else if (  -f $f1 && ! -f $f2 ) then
      #file 1 considered older
      echo -1
   else 
      set t1 = `\stat -f "%m" $f1`
      set t2 = `\stat -f "%m" $f2`
      set dt = `ccalc -i $t2 - $t1`
      echo $dt
   endif   

   goto END

HELP:
   echo ""
   echo "Usage: `basename $0` <FILE1> <FILE2>"
   echo ""    
   echo "Returns the difference in modification time A(.) "
   echo " between FILE1 and FILE2"
   echo ""
   echo "If FILE2 was modified after FILE1 then A(FILE2) - A(FILE1) > 0"
   echo ""
   echo "Non existent files are considered more recent than existing ones."
   echo "" 
   goto END
   
END: