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[elisp/lemi.git] / poe / pccl.el

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+;;; pccl.el --- Portable CCL utility for Mule 2.*
+
+;; Copyright (C) 1998 Free Software Foundation, Inc.
+
+;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Keywords: emulation, compatibility, Mule
+
+;; This file is part of APEL (A Portable Emacs Library).
+
+;; This program 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.
+
+;; This program 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 GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+(require 'broken)
+
+(broken-facility ccl-usable
+  "Emacs has not CCL."
+  (and (featurep 'mule)
+       (if (featurep 'xemacs)
+           (>= emacs-major-version 21)
+         (>= emacs-major-version 19))))
+
+(unless-broken ccl-usable
+  (require 'ccl)
+  (require 'advice)
+
+  (if (featurep 'mule)
+      (if (featurep 'xemacs)
+          (if (>= emacs-major-version 21)
+              ;; for XEmacs 21 with mule
+              (require 'pccl-20))
+        (if (>= emacs-major-version 20)
+            ;; for Emacs 20
+            (require 'pccl-20)
+          ;; for Mule 2.*
+          (require 'pccl-om))))
+
+  (defadvice define-ccl-program
+    (before accept-long-ccl-program activate)
+    "When CCL-PROGRAM is too long, internal buffer is extended automaticaly."
+    (let ((try-ccl-compile t)
+          (prog (eval (ad-get-arg 1))))
+      (ad-set-arg 1 (` '(, prog)))
+      (while try-ccl-compile
+        (setq try-ccl-compile nil)
+        (condition-case sig
+            (ccl-compile prog)
+          (args-out-of-range
+           (if (and (eq (car (cdr sig)) ccl-program-vector)
+                    (= (car (cdr (cdr sig))) (length ccl-program-vector)))
+               (setq ccl-program-vector
+                     (make-vector (* 2 (length ccl-program-vector)) 0)
+                     try-ccl-compile t)
+             (signal (car sig) (cdr sig))))))))
+  )
+
+
+;;; @ end
+;;;
+
+(require 'product)
+(product-provide (provide 'pccl) (require 'apel-ver))
+
+;;; pccl.el ends here