From: Kazuhiro Ito <kzhr@d1.dion.ne.jp>
To: 44411@debbugs.gnu.org
Subject: bug#44411: 28.0.50; uudecode-decode-region-internal is broken
Date: Tue, 03 Nov 2020 17:27:41 +0900 [thread overview]
Message-ID: <86y2ji6e0y.wl--xmue@d1.dion.ne.jp> (raw)
When I call uudecode-decode-region-internal in multibyte buffer, it
fails to decode eight-bit characters.
The function makes string from uuencoded text by passing unsigned char
vlue (0-255) to char-to-string function, which makes multibyte-string.
After that, string is decoded as binary. But eight-bit characters are
never made in that way.
(let ((ch #xc8))
(decode-coding-string (char-to-string ch) 'binary))
-> "8"
Additionally, concat and char-to-string functions are called so
frequently that deocder is very slow for large data.
Please see the below patch.
diff --git a/lisp/mail/uudecode.el b/lisp/mail/uudecode.el
index bcbd571b53..f9254aee75 100644
--- a/lisp/mail/uudecode.el
+++ b/lisp/mail/uudecode.el
@@ -149,12 +149,10 @@ uudecode-decode-region-internal
(setq counter (1+ counter)
inputpos (1+ inputpos))
(cond ((= counter 4)
- (setq result (cons
- (concat
- (char-to-string (ash bits -16))
- (char-to-string (logand (ash bits -8) 255))
- (char-to-string (logand bits 255)))
- result))
+ (setq result (cons (logand bits 255)
+ (cons (logand (ash bits -8) 255)
+ (cons (ash bits -16)
+ result))))
(setq bits 0 counter 0))
(t (setq bits (ash bits 6)))))))
(cond
@@ -166,26 +164,21 @@ uudecode-decode-region-internal
;;(error "uucode ends unexpectedly")
(setq done t))
((= counter 3)
- (setq result (cons
- (concat
- (char-to-string (logand (ash bits -16) 255))
- (char-to-string (logand (ash bits -8) 255)))
- result)))
+ (setq result (cons (logand (ash bits -8) 255)
+ (cons (logand (ash bits -16) 255)
+ result))))
((= counter 2)
- (setq result (cons
- (char-to-string (logand (ash bits -10) 255))
- result))))
+ (setq result (cons (logand (ash bits -10) 255)
+ result))))
(skip-chars-forward non-data-chars end))
+ (setq result (apply #'unibyte-string (nreverse result)))
(if file-name
(with-temp-file file-name
(set-buffer-multibyte nil)
- (insert (apply #'concat (nreverse result))))
+ (insert result))
(or (markerp end) (setq end (set-marker (make-marker) end)))
(goto-char start)
- (if enable-multibyte-characters
- (dolist (x (nreverse result))
- (insert (decode-coding-string x 'binary)))
- (insert (apply #'concat (nreverse result))))
+ (insert result)
(delete-region (point) end))))))
;;;###autoload
--
Kazuhiro Ito
next reply other threads:[~2020-11-03 8:27 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-03 8:27 Kazuhiro Ito [this message]
2020-11-03 15:09 ` bug#44411: 28.0.50; uudecode-decode-region-internal is broken Lars Ingebrigtsen
2020-11-03 15:36 ` Eli Zaretskii
2020-11-04 8:26 ` Kazuhiro Ito
2020-11-04 15:26 ` Eli Zaretskii
2020-11-05 10:48 ` Kazuhiro Ito
2020-11-05 13:48 ` Eli Zaretskii
2020-11-07 9:42 ` Eli Zaretskii
2020-11-09 15:47 ` Kazuhiro Ito
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