;;; fsf-compat-unicode.el --- Provide the FSF's Mule UCS subsets in XEmacs.
;; Copyright (C) 2006 by Free Software Foundation, Inc.
;; Author: Aidan Kehoe <email@example.com>
;; 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
;;; Only for 21.5 and newer.
(unless (and (fboundp 'encode-char)
(eq #x31C (with-fboundp '(encode-char decode-char)
(encode-char (decode-char 'ucs #x31C) 'ucs))))
(error "Unicode support needed for this file not available!"))
(and (> emacs-major-version 20)
(> emacs-minor-version 4)
;; If we're being compiled by 21.5, use the actual define-ccl-program
;; macro, but evaluated at runtime.
;; Having this as
;; (eval-when-compile (and (featurep 'mule) (macroexpand
;; '(define-ccl-program ...))
;; in order to have the macro evaluated at compile time, results
;; in the statement being empty in the compiled file, which as I
;; understand it is a bug.
((r1 = (r1 << 7))
(r1 = (r1 | r2))
(mule-to-unicode r0 r1)
(r1 = (r0 >> 7))
(r2 = (r0 & 255))))
"CCL program to transform Mule characters to UCS-2."))
;; Pre-expand the macro for 21.4. 21.4 will error on loading this file, but
;; it may compile it. define-ccl-program should not be a macro, but that's
;; by the way.
(let ((prog [1 10 131127 8 98872 65823 147513 8 82009 255 22]))
(defconst fsf-compat-ccl-encode-to-ucs-2 prog
"CCL program to transform Mule characters to UCS-2.")
(put (quote fsf-compat-ccl-encode-to-ucs-2)
(register-ccl-program (quote fsf-compat-ccl-encode-to-ucs-2) prog))
(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. "
for (first-ucs last-ucs final) in '((#x0100 #x24FF ?1)
(#x2500 #x33ff ?2)
(#xE000 #xFFFF ?3))
(intern (format "mule-unicode-%04x-%04x"
"Unicode subset (U+%04X..U+%04X) for FSF compatibility."
(list 'dimension 2
'short-name (format "Unicode subset %c" final)
'long-name (format "Unicode subset (U+%04X..U+%04X)"
;; The names of the character sets lie, at least as of GNU Emacs
;; 188.8.131.52. 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)
;; The following code creates a form, which, when evaluated in GNU Emacs,
;; checks our compatibility with their three character sets.
; (insert "(require 'cl)\n\n(assert\n (and\n")
; for charset-symbol in '(mule-unicode-2500-33ff
; (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!\")"))
;;; end fsf-compat-unicode.el