shellarguments % push command line arguments to stack

/tmpstr 65535 string def  % define temp buffer


/outstreamRaw 		% define raw output stream / file with filters (new file)	
  2 index (w) file
def

/outstreamRawAppend 	% define raw output stream / file with filters (append)
  2 index (a) file
def

/instream		% define inputstream / file
  3 index (r) file
def

/decodeFilters		% decode filters
 4 index   
def

/outstreamEncode 	% define output stream / file with filters
  2 index (a) file 
  6 index  cvx exec 
def


/compress 
{

  (%!\ncurrentfile) outstreamRaw exch writestring  % header, no filers for header
  decodeFilters outstreamRaw exch writestring  % header
  ( cvx exec\n) outstreamRaw exch writestring  % header
  outstreamRaw closefile

  {
    instream
    tmpstr readstring not
    {
      outstreamEncode exch writestring
      exit
    } if
    outstreamEncode exch writestring
  } loop

  outstreamEncode closefile
  instream closefile
  flush
  
  (~>) outstreamRawAppend exch writestring  % End 
  outstreamRawAppend closefile

} bind def

compress