--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/coding.el	Mon Aug 13 10:23:02 2007 +0200
@@ -0,0 +1,208 @@
+;;; coding.el --- Coding-system functions for XEmacs.
+
+;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
+;; Licensed to the Free Software Foundation.
+;; Copyright (C) 1995 Amdahl Corporation.
+;; Copyright (C) 1995 Sun Microsystems.
+;; Copyright (C) 1997 MORIOKA Tomohiko
+
+;; This file is part of XEmacs.
+
+;; This file is very similar to mule-coding.el
+
+;; XEmacs is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; XEmacs is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with XEmacs; see the file COPYING.  If not, write to the 
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;;; split off of mule.el.
+
+;;; Code:
+
+(defalias 'check-coding-system 'get-coding-system)
+
+(defconst modeline-multibyte-status '("%C")
+  "Modeline control for showing multibyte extension status.")
+
+;; override the default value defined in loaddefs.el.
+(setq-default modeline-format
+  (cons (purecopy "")
+	(cons 'modeline-multibyte-status
+	      (cdr modeline-format))))
+
+(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 cell (DECODING . ENCODING) specifying the coding systems
+for decoding and encoding respectively,
+or a function symbol which, when called, returns such a cons cell."
+  (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)))))))
+
+(defsubst keyboard-coding-system ()
+  "Return coding-system of what is sent from terminal keyboard."
+  keyboard-coding-system)
+
+(defun set-keyboard-coding-system (coding-system)
+  "Set the coding system used for TTY keyboard input. Currently broken."
+  (interactive "zkeyboard-coding-system: ")
+  (get-coding-system coding-system) ; correctness check
+  (setq keyboard-coding-system coding-system)
+  (redraw-modeline t))
+
+(defsubst terminal-coding-system ()
+  "Return coding-system of your terminal."
+  terminal-coding-system)
+
+(defun set-terminal-coding-system (coding-system)
+  "Set the coding system used for TTY display output. Currently broken."
+  (interactive "zterminal-coding-system: ")
+  (get-coding-system coding-system) ; correctness check
+  (setq terminal-coding-system coding-system)
+  (set-console-tty-coding-system (device-console) terminal-coding-system)
+  (redraw-modeline t))
+
+(defun set-pathname-coding-system (coding-system)
+  "Set the coding system used for file system path names."
+  (interactive "zPathname-coding-system: ")
+  (get-coding-system coding-system) ; correctness check
+  (setq file-name-coding-system coding-system))
+
+(defun what-coding-system (start end &optional arg)
+  "Show the encoding of text in the region.
+This function is meant to be called interactively;
+from a Lisp program, use `detect-coding-region' instead."
+  (interactive "r\nP")
+  (princ (detect-coding-region start end)))
+
+(defun decode-coding-string (str coding-system)
+  "Decode the string STR which is encoded in CODING-SYSTEM.
+Does not modify STR.  Returns the decoded string on successful conversion."
+  (with-string-as-buffer-contents
+   str (decode-coding-region (point-min) (point-max) coding-system)))
+
+(defun encode-coding-string (str coding-system)
+  "Encode the string STR using CODING-SYSTEM.
+Does not modify STR.  Returns the encoded string on successful conversion."
+  (with-string-as-buffer-contents
+   str (encode-coding-region (point-min) (point-max) coding-system)))
+
+
+;;;; Coding system accessors
+
+(defun coding-system-mnemonic (coding-system)
+  "Return the 'mnemonic property of CODING-SYSTEM."
+  (coding-system-property coding-system 'mnemonic))
+
+(defalias 'coding-system-docstring 'coding-system-doc-string)
+
+(defun coding-system-eol-type (coding-system)
+  "Return the 'eol-type property of CODING-SYSTEM."
+  (coding-system-property coding-system 'eol-type))
+
+(defun coding-system-eol-lf (coding-system)
+  "Return the 'eol-lf property of CODING-SYSTEM."
+  (coding-system-property coding-system 'eol-lf))
+
+(defun coding-system-eol-crlf (coding-system)
+  "Return the 'eol-crlf property of CODING-SYSTEM."
+  (coding-system-property coding-system 'eol-crlf))
+
+(defun coding-system-eol-cr (coding-system)
+  "Return the 'eol-cr property of CODING-SYSTEM."
+  (coding-system-property coding-system 'eol-cr))
+
+(defun coding-system-post-read-conversion (coding-system)
+  "Return the 'post-read-conversion property of CODING-SYSTEM."
+  (coding-system-property coding-system 'post-read-conversion))
+
+(defun coding-system-pre-write-conversion (coding-system)
+  "Return the 'pre-write-conversion property of CODING-SYSTEM."
+  (coding-system-property coding-system 'pre-write-conversion))
+
+(defun coding-system-base (coding-system)
+  "Return the base coding system of CODING-SYSTEM."
+  (if (not (coding-system-eol-type coding-system))
+      coding-system
+    (find-coding-system 
+     (intern
+      (substring 
+       (symbol-name (coding-system-name coding-system))
+       0
+       (string-match "-unix$\\|-dos$\\|-mac$"
+		     (symbol-name (coding-system-name coding-system))))))))
+
+;;;; Definitions of predefined coding systems
+
+(make-coding-system
+ 'undecided 'undecided
+ "Automatic conversion."
+ '(mnemonic "Auto"))
+
+;; compatibility for old XEmacsen (don't use it)
+(copy-coding-system 'undecided 'automatic-conversion)
+
+(copy-coding-system 'no-conversion 'raw-text)
+
+(make-compatible-variable 'enable-multibyte-characters "Unimplemented")
+
+(define-obsolete-variable-alias
+  'pathname-coding-system 'file-name-coding-system)
+
+;;; mule-coding.el ends here