--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/mule/mule-coding.el	Mon Aug 13 09:02:59 2007 +0200
@@ -0,0 +1,268 @@
+;;; mule-coding.el --- Coding-system functions for Mule.
+
+;; Copyright (C) 1992,93,94,95 Free Software Foundation, Inc.
+;; Copyright (C) 1995 Amdahl Corporation.
+;; Copyright (C) 1995 Sun Microsystems.
+
+;; This file is part of XEmacs.
+
+;; 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:
+
+(defun set-terminal-coding-system (coding-system)
+  "Set the coding system used for TTY display output."
+  (interactive "zterminal-coding-system: ")
+  (get-coding-system coding-system) ;; correctness check
+  (setq terminal-coding-system 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 pathname-coding-system coding-system))
+
+(defun what-coding-system (start end &optional arg)
+  "Show the encoding of text in the region.
+With prefix arg, show all possible coding systems.
+This function is meant to be called interactively;
+from a Lisp program, use `detect-coding-region' instead."
+  (interactive "r\nP")
+  (let ((codings (detect-coding-region start end)))
+    (message "%s" (if (or arg (symbolp codings)) codings (car codings)))))
+
+(defmacro with-string-as-buffer-contents (str &rest body)
+  "With the contents of the current buffer being STR, run BODY.
+Returns the new contents of the buffer, as modified by BODY.
+The original current buffer is restored afterwards."
+  `(let ((curbuf (current-buffer))
+         (tempbuf (get-buffer-create " *string-as-buffer-contents*")))
+     (unwind-protect
+         (progn
+           (set-buffer tempbuf)
+           (buffer-disable-undo (current-buffer))
+           (erase-buffer)
+           (insert ,str)
+           ,@body
+           (buffer-string))
+       (erase-buffer tempbuf)
+       (set-buffer curbuf))))
+
+(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))
+
+(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-charset (coding-system register)
+  "Return the 'charset property of CODING-SYSTEM for the specified REGISTER."
+  (cond ((not (integerp register))
+	 (signal 'wrong-type-argument (list 'integerp register)))
+	((= register 0)
+	 (coding-system-property coding-system 'charset-g0))
+	((= register 1)
+	 (coding-system-property coding-system 'charset-g1))
+	((= register 2)
+	 (coding-system-property coding-system 'charset-g2))
+	((= register 3)
+	 (coding-system-property coding-system 'charset-g3))
+	(t
+	 (signal 'args-out-of-range (list register 0 3)))))
+
+(defun coding-system-force-on-output (coding-system register)
+  "Return the 'force-on-output property of CODING-SYSTEM for the specified REGISTER."
+  (cond ((not (integerp register))
+	 (signal 'wrong-type-argument (list 'integerp register)))
+	((= register 0)
+	 (coding-system-property coding-system 'force-g0-on-output))
+	((= register 1)
+	 (coding-system-property coding-system 'force-g1-on-output))
+	((= register 2)
+	 (coding-system-property coding-system 'force-g2-on-output))
+	((= register 3)
+	 (coding-system-property coding-system 'force-g3-on-output))
+	(t
+	 (signal 'args-out-of-range (list register 0 3)))))
+
+(defun coding-system-short (coding-system)
+  "Return the 'short property of CODING-SYSTEM."
+  (coding-system-property coding-system 'short))
+
+(defun coding-system-no-ascii-eol (coding-system)
+  "Return the 'no-ascii-eol property of CODING-SYSTEM."
+  (coding-system-property coding-system 'no-ascii-eol))
+
+(defun coding-system-no-ascii-cntl (coding-system)
+  "Return the 'no-ascii-cntl property of CODING-SYSTEM."
+  (coding-system-property coding-system 'no-ascii-cntl))
+
+(defun coding-system-seven (coding-system)
+  "Return the 'seven property of CODING-SYSTEM."
+  (coding-system-property coding-system 'seven))
+
+(defun coding-system-lock-shift (coding-system)
+  "Return the 'lock-shift property of CODING-SYSTEM."
+  (coding-system-property coding-system 'lock-shift))
+
+(defun coding-system-use-japanese-jisx0201-roman (coding-system)
+  "Return the 'use-japanese-jisx0201-roman property of CODING-SYSTEM."
+  (coding-system-property coding-system 'use-japanese-jisx0201-roman))
+
+(defun coding-system-use-japanese-jisx0208-1978 (coding-system)
+  "Return the 'use-japanese-jisx0208-1978 property of CODING-SYSTEM."
+  (coding-system-property coding-system 'use-japanese-jisx0208-2978))
+
+(defun coding-system-no-iso6429 (coding-system)
+  "Return the 'no-iso6429 property of CODING-SYSTEM."
+  (coding-system-property coding-system 'no-iso6429))
+
+(defun coding-system-ccl-encode (coding-system)
+  "Return the CCL 'encode property of CODING-SYSTEM."
+  (coding-system-property coding-system 'encode))
+
+(defun coding-system-ccl-decode (coding-system)
+  "Return the CCL 'decode property of CODING-SYSTEM."
+  (coding-system-property coding-system 'decode))
+
+
+;;;; Definitions of predefined coding systems
+
+(make-coding-system
+ 'autodetect 'autodetect
+ "Automatic conversion."
+ '(mnemonic "Auto"))
+
+(make-coding-system
+ 'ctext 'iso2022
+ "Coding-system used in X as Compound Text Encoding."
+ '(charset-g0 ascii
+   charset-g1 latin-1
+   eol-type lf
+   mnemonic "CText"
+   ))
+
+(make-coding-system
+ 'iso-2022-ss2-8 'iso2022
+ "ISO-2022 coding system using SS2 for 96-charset in 8-bit code."
+ '(charset-g0 ascii
+   charset-g1 latin-1
+   charset-g2 t ;; unspecified but can be used later.
+   short t
+   mnemonic "ISO8/SS"
+   ))
+
+(make-coding-system
+ 'iso-2022-ss2-7 'iso2022
+ "ISO-2022 coding system using SS2 for 96-charset in 7-bit code."
+ '(charset-g0 ascii
+   charset-g2 t ;; unspecified but can be used later.
+   seven t
+   short t
+   mnemonic "ISO7/SS"
+   ))
+
+(make-coding-system
+ 'iso-2022-7 'iso2022
+ "ISO-2022 seven-bit coding system.  No single-shift or locking-shift."
+ '(charset-g0 ascii
+   seven t
+   short t
+   mnemonic "ISO7"
+   ))
+
+(make-coding-system
+ 'iso-2022-8 'iso2022
+ "ISO-2022 eight-bit coding system.  No single-shift or locking-shift."
+ '(charset-g0 ascii
+   charset-g1 latin-1
+   short t
+   mnemonic "ISO8"
+   ))
+
+(make-coding-system
+ 'escape-quoted 'iso2022
+ "ISO-2022 eight-bit coding system with escape quoting; used for .ELC files."
+ '(charset-g0 ascii
+   charset-g1 latin-1
+   eol-type lf
+   escape-quoted t
+   mnemonic "ESC/Quot"
+   ))
+
+(make-coding-system
+ 'iso-2022-lock 'iso2022
+ "ISO-2022 coding system using Locking-Shift for 96-charset."
+ '(charset-g0 ascii
+   charset-g1 t ;; unspecified but can be used later.
+   seven t
+   lock-shift t
+   mnemonic "ISO7/Lock"
+   ))
+
+;; initialize the coding categories to something semi-reasonable
+;; so that the remaining Lisp files can contain extended characters.
+;; (They will be in ISO-7 format)
+
+(set-coding-priority-list '(iso-8-2 shift-jis iso-8-designate iso-8-1 big5
+			    iso-7 iso-lock-shift no-conversion))
+
+(set-coding-category-system 'iso-7 'iso-2022-7)
+(set-coding-category-system 'iso-8-designate 'ctext)
+(set-coding-category-system 'iso-8-1 'ctext)
+(set-coding-category-system 'iso-lock-shift 'iso-2022-lock)
+(set-coding-category-system 'no-conversion 'no-conversion)