




 
Pathname identifying location of buffer .
An external format spec.
A buffer whose contents are examined.
Length (an integer) up to which buffer should be examined.
The result of reading the value returned from the 
encoding
 or 
external-format
 option as a Lisp expression in the 
keyword
 package.
Looks in the file options (EMACS-style 
-*-
 line) for an option called 
encoding
 or 
external-format
, with value 
value
. If found, read 
value
 as a Lisp expression in the 
keyword
 package and return the result.