PCL Autodetection

[Hans Fugal]

We (finally) migrated from lprng to cups recently, and had trouble with 
various software that generates PCL. I was under the impression that PCL 
was autodetected and passed along to the printer, but I was getting 
strange text instead of the printout.

After a little investigation, I discovered the autodection for PCL is a 
little bit too restrictive.

--- mime.types.orig     2004-12-03 15:57:50.000000000 -0700
+++ mime.types  2004-12-03 15:58:35.000000000 -0700
@@ -141,9 +141,7 @@
  application/vnd.cups-raster    string(0,"RaSt") string(0,"tSaR")
  application/vnd.cups-raw       (string(0,<1B>E) + !string(2,<1B>%0B)) \
                                 string(0,<1B>@) \
-                               (contains(0,128,<1B>%-12345X) + \
-                                (contains(0,1024,"LANGUAGE=PCL") \
-                                 contains(0,1024,"LANGUAGE = PCL")))
+                               string(0,<1B>%-12345X)

  ########################################################################
  #

The PCL spec doesn't require that LANGUAGE=PCL (or a variant thereof) 
appear in the PJL. However it does state:

   Universal Exit Language
   -----------------------
     Terminates operation of current language and returns control to PJL.
     Every job should begin and end with this command.

       <ESC>%-12345X

Which translates to string(0,<1B>%-12345X) (for the beginning part). So 
The above patch is a more reliable match. I also wonder why <1B>E is 
checked only at the beginning and not with a contains?

If this isn't the appropriate forum for this patch and/or questions let 
me know. Thanks!