[PATCH] Make the FSF's Unicode subset charsets available in XEmacs

[Aidan Kehoe]

Comments? Objections?

xemacs-packages/fsf-compat/ChangeLog addition:

2006-11-11  Aidan Kehoe  <kehoea at parhasard.net>

	* mule-unicode-charsets.el:
	Provide support for some FSF-specific Unicode-coverage Mule
	charsets. 
	

XEmacs Packages source patch:
Diff command:   cvs -q diff -Nu
Files affected: xemacs-packages/fsf-compat/mule-unicode-charsets.el
===================================================================
RCS

Index: xemacs-packages/fsf-compat/mule-unicode-charsets.el
===================================================================
RCS file: mule-unicode-charsets.el
diff -N mule-unicode-charsets.el
--- /dev/null	Sat Nov 11 19:14:42 2006
+++ mule-unicode-charsets.el	Sat Nov 11 19:14:19 2006
@@ -0,0 +1,95 @@
+;;; mule-unicode-charsets.el --- Provide the FSF's Mule Unicode subsets in
+;;; XEmacs. 
+
+;; Copyright (C) 2006 by Free Software Foundation, Inc.
+
+;; Author: Aidan Kehoe <kehoea at parhasard.net>
+;; Keywords: Unicode, Mule
+
+;; 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.
+
+;;; Synched up with: Not in FSF
+
+;;; Commentary:
+
+;;; Code:
+
+(define-ccl-program fsf-compat-ccl-encode-to-ucs-2
+  `(1
+    ((r1 = (r1 << 8))
+     (r1 = (r1 | r2))
+     (mule-to-unicode r0 r1)
+     (r1 = (r0 >> 8))
+     (r2 = (r0 & 255))))
+  "CCL program to transform Mule characters to UCS-2.")
+
+(defun fsf-compat-init-mule-unicode-charsets ()
+  "Make some Mule character sets that the FSF uses available in XEmacs.
+
+These character sets cover some Unicode code space explicitly; we use a
+different solution to the same problem, so you should only need these
+character sets if you're editing FSF source.  "
+  (let (charset-symbol)
+    (loop
+      for (first-ucs last-ucs final) in '((#x0100 #x24FF ?1)
+					  (#x2500 #x33ff ?2)
+					  (#xE000 #xFFFF ?3))
+      do 
+      (setq charset-symbol 
+	    (intern (format "mule-unicode-%04x-%04x"
+			    first-ucs last-ucs)))
+      (make-charset charset-symbol
+		    (format 
+		     "Unicode subset (U+%04X..U+%04X) for FSF compatibility."
+		     first-ucs last-ucs)
+		    (list 'dimension 2 
+			  'registries ["iso10646-1"]
+			  'chars 96
+			  'columns 1
+			  'direction 'l2r
+			  'final final
+			  'graphic 0
+			  'short-name (format "Unicode subset %c" final)
+			  'long-name (format "Unicode subset (U+%04X..U+%04X)"
+					     first-ucs last-ucs)
+			  'ccl-program 'fsf-compat-ccl-encode-to-ucs-2))
+      ;; The names of the character sets lie, at least as of GNU Emacs
+      ;; 22.0.50.3. The difference appears to be that they keep assigning
+      ;; code points until the end of the 96x96 space of the character sets.
+      (loop for ku from 32 to 127 do
+	(loop for ten from 32 to 127 do 
+	  (set-unicode-conversion (make-char charset-symbol ku ten) first-ucs)
+	  (incf first-ucs))))))
+
+;; The following code creates a form, which, when evaluated in GNU Emacs,
+;; checks our compatibility with their three character sets.
+
+; (progn
+;   (insert "(require 'cl)\n\n(assert\n (and\n")
+;   (loop
+;     for charset-symbol in '(mule-unicode-2500-33ff
+; 			    mule-unicode-e000-ffff
+; 			    mule-unicode-0100-24ff)
+;     do
+;     (loop for ku from 32 to 127 do
+;       (loop for ten from 32 to 127 do
+; 	(insert (format
+; 		 "  (eq (encode-char (make-char '%s %d %d) 'ucs) #x%04X)\n" 
+; 		 charset-symbol ku ten 
+; 		 (encode-char (make-char charset-symbol ku ten) 'ucs))))))
+;   (insert "  ) nil \"We're incompatible with the FSF!\")"))

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