(setq tail (cdr tail))))
codings)))
-;;;###autoload
-(defun modify-coding-system-alist (target-type regexp coding-system)
- "Modify one of look up tables for finding a coding system on I/O operation.
-There are three of such tables, file-coding-system-alist,
-process-coding-system-alist, and network-coding-system-alist.
-
-TARGET-TYPE specifies which of them to modify.
-If it is `file', it affects file-coding-system-alist (which see).
-If it is `process', it affects process-coding-system-alist (which see).
-If it is `network', it affects network-codign-system-alist (which see).
-
-REGEXP is a regular expression matching a target of I/O operation.
-The target is a file name if TARGET-TYPE is `file', a program name if
-TARGET-TYPE is `process', or a network service name or a port number
-to connect to if TARGET-TYPE is `network'.
-
-CODING-SYSTEM is a coding system to perform code conversion on the I/O
-operation, or a cons of coding systems for decoding and encoding
-respectively, or a function symbol which returns the cons."
- (or (memq target-type '(file process network))
- (error "Invalid target type: %s" target-type))
- (or (stringp regexp)
- (and (eq target-type 'network) (integerp regexp))
- (error "Invalid regular expression: %s" regexp))
- (if (symbolp coding-system)
- (if (not (fboundp coding-system))
- (progn
- (check-coding-system coding-system)
- (setq coding-system (cons coding-system coding-system))))
- (check-coding-system (car coding-system))
- (check-coding-system (cdr coding-system)))
- (cond ((eq target-type 'file)
- (let ((slot (assoc regexp file-coding-system-alist)))
- (if slot
- (setcdr slot coding-system)
- (setq file-coding-system-alist
- (cons (cons regexp coding-system)
- file-coding-system-alist)))))
- ((eq target-type 'process)
- (let ((slot (assoc regexp process-coding-system-alist)))
- (if slot
- (setcdr slot coding-system)
- (setq process-coding-system-alist
- (cons (cons regexp coding-system)
- process-coding-system-alist)))))
- (t
- (let ((slot (assoc regexp network-coding-system-alist)))
- (if slot
- (setcdr slot coding-system)
- (setq network-coding-system-alist
- (cons (cons regexp coding-system)
- network-coding-system-alist)))))))
-
;;;###autoload
(defun coding-system-plist (coding-system)
"Return property list of CODING-SYSTEM."