Commit 347003be authored by Dave Love's avatar Dave Love

*** empty log message ***

parent 7c695ab9
......@@ -88,6 +88,8 @@ See the files mac/README and mac/INSTALL for build instructions.
* Changes in Emacs 21.4
** A UTF-7 coding system is available in the library `utf-7'.
** GUD mode has its own tool bar for controlling execution of the inferior
and other common debugger commands.
......@@ -224,13 +226,17 @@ Big 5 is then converted to CNS.
library. These include complete versions of most of those in
codepage.el, based on Unicode mappings.
** The utf-8 coding system has been enhanced. Untranslatable utf-8
sequences (mostly representing CJK characters) are composed into
single quasi-characters. User option `utf-translate-cjk-mode'
arranges to translate many utf-8 CJK character sequences into real
Emacs characters in a similar way to the Mule-UCS system. The utf-8
coding system will now encode characters from most of Emacs's
** The utf-8/16 coding systems have been enhanced.
By default, untranslatable utf-8 sequences (mostly representing CJK
characters) are simply composed into single quasi-characters. User
option `utf-translate-cjk' arranges to translate many utf-8 CJK
character sequences into real Emacs characters in a similar way to the
Mule-UCS system. This uses significant space, so is not the default.
You can augment/amend the CJK translation via hash tables
`ucs-mule-cjk-to-unicode' and `ucs-unicode-to-mule-cjk'. The utf-8
coding system now also encodes characters from most of Emacs's
one-dimensional internal charsets, specifically the ISO-8859 ones.
The utf-16 coding system is affected similarly.
** iso-10646-1 (`Unicode') fonts can be used to display any range of
characters encodable by the utf-8 coding system. Just specify the
......@@ -405,7 +411,7 @@ mode-line.
** Speedbar has moved from the "Tools" top level menu to "Show/Hide".
+++
** Emacs can now indicate in the mode-line the presence of new e-mails
** Emacs can now indicate in the mode-line the presence of new e-mail
in a directory or in a file. See the documentation of the user option
`display-time-mail-directory'.
......@@ -1208,7 +1214,7 @@ mode-lines in inverse-video.
---
** The obsolete C mode (c-mode.el) has been removed to avoid problems
with Custom.
with Custom. cplus-md.el, which required it, has also been removed.
** New package benchmark.el contains simple support for convenient
timing measurements of code (including the garbage collection component).
......
2003-05-08 Dave Love <fx@gnu.org>
* international/utf-7.el: New file.
2003-05-07 Francis J. Wright <F.J.Wright@qmul.ac.uk>
* files.el (insert-file-contents-literally): Allow it to be called
......
;;; utf-7.el --- utf-7 coding system
;; Copyright (C) 2003 Free Software Foundation, Inc.
;; Author: Dave Love <fx@gnu.org>
;; Keywords: i18n, mail
;; This file 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 file 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.
;;; Commentary:
;; Defines a coding system for UTF-7, defined in RFC 2152. Non-ASCII
;; segments are encoded as base64-encoded big endian UTF-16. Also
;; defines a variation required for IMAP (RFC 2060).
;; The encoding and decoding was originally taken from Jon K Hellan's
;; implementation in Gnus, but has been substantially re-done.
;; This probably needs more attention. In particular, it's not
;; completely consistent with iconv's behaviour. It's arguable
;; whether the IMAP version should be a coding system since it's
;; apparently only used for IMAP mailbox names, so it's commented out.
;;; Code:
(make-coding-system
'utf-7 0 ?U
"UTF-7 encoding of Unicode (RFC 2152)"
nil
`((safe-chars . ,(coding-system-get 'utf-16-be 'safe-chars))
(mime-charset . utf-7)
(pre-write-conversion . utf-7-pre-write-conversion)
(post-read-conversion . utf-7-post-read-conversion)))
;; (make-coding-system
;; 'utf-7-imap 0 ?u
;; "UTF-7 encoding of Unicode, IMAP version (RFC 2060)"
;; nil
;; `((safe-chars . ,(coding-system-get 'utf-16-be 'safe-chars))
;; (pre-write-conversion . utf-7-imap-pre-write-conversion)
;; (post-read-conversion . utf-7-imap-post-read-conversion)))
(defun utf-7-decode (len imap)
"Decode LEN bytes of UTF-7 at point.
IMAP non-nil means use the IMAP version."
(save-excursion
(save-restriction
(narrow-to-region (point) (+ (point) len))
(let ((not-esc (if imap "^&" "^+"))
(skip-chars (if imap "A-Za-z0-9+," "A-Za-z0-9+/")))
(while (not (eobp))
(skip-chars-forward not-esc)
(unless (eobp)
(forward-char)
(let ((p (point))
(run-length (skip-chars-forward skip-chars)))
(if (eq ?- (char-after))
(delete-char 1))
(unless (= run-length 0) ; encoded lone esc-char
(let ((pl (mod (- run-length) 4)))
(insert-char ?= pl)
(if imap
(subst-char-in-region p (point) ?, ?/))
(base64-decode-region p (point)))
(decode-coding-region p (point) 'utf-16-be)
(save-excursion
(goto-char p)
(delete-backward-char 1)))))))
(- (point-max) (point-min)))))
(defun utf-7-post-read-conversion (len)
(utf-7-decode len nil))
;; (defun utf-7-imap-post-read-conversion (len)
;; (utf-7-decode len t))
(defun utf-7-encode (from to imap)
"Encode bytes between FROM and TO to UTF-7.
ESC and SKIP-CHARS are adjusted for the normal and IMAP versions."
(let* ((old-buf (current-buffer))
(esc (if imap ?& ?+))
;; These are characters which can be encoded asis.
(skip-chars (if imap
"\t\n\r\x20-\x25\x27-\x7e" ; rfc2060
;; This includes the rfc2152 optional set.
;; Perhaps it shouldn't (like iconv).
"\t\n\r -*,-[]-}"))
(not-skip-chars (format "^%s%c" skip-chars esc)))
(set-buffer (generate-new-buffer " *temp*"))
(if (stringp from)
(insert from)
(insert-buffer-substring old-buf from to))
(goto-char (point-min))
(while (not (eobp))
(skip-chars-forward skip-chars)
(if (eq ?+ (char-after))
(progn (forward-char)
(insert ?-))
(unless (eobp)
(insert esc)
(let ((p (point)))
(skip-chars-forward not-skip-chars)
(save-restriction
;; encode-coding-region doesn't preserve point
(narrow-to-region p (point))
(encode-coding-region p (point-max) 'utf-16-be)
(base64-encode-region p (point-max))
(if imap
(subst-char-in-region p (point-max) ?/ ?,))
(goto-char p)
;; As I read the RFC, this isn't correct, but it's
;; consistent with iconv, at least regarding `='.
(skip-chars-forward "^= \t\n")
(delete-region (point) (point-max))))
(unless (eobp)
(insert ?-)))))
nil))
(defun utf-7-pre-write-conversion (from to)
(utf-7-encode from to nil))
;; (defun utf-7-imap-pre-write-conversion (from to)
;; (utf-7-encode from to t))
(provide 'utf-7)
;;; utf-7.el ends here
2003-05-08 Dave Love <fx@gnu.org>
* coding.c (Vlast_coding_system_used): Doc fix.
2003-05-07 Jason Rumney <jasonr@gnu.org>
* fileio.c (Ffile_symlink_p): Let handlers handle symlinks even
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment