GNU bug report logs - #2878
bindat-pack returns unibyte string for emacs 22 but multibyte string for emacs 23

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Package: emacs;

Reported by: Yee Keat Phuah <ykphuah <at> gmail.com>

Date: Fri, 3 Apr 2009 15:25:05 UTC

Severity: normal

Done: Chong Yidong <cyd <at> stupidchicken.com>

Bug is archived. No further changes may be made.

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Yee Keat Phuah <ykphuah <at> gmail.com>
To: emacs-pretest-bug <at> gnu.org
Subject: bindat-pack returns unibyte string for emacs 22 but multibyte string 
	for emacs 23
Date: Fri, 3 Apr 2009 23:20:56 +0800

Hi,

This piece of code returned nil on emacs 22 and t on emacs 23.
(let* ((spec `((:method-id     vec 4)))
       (data  `((:ref-type  . ,(vector #x00 #x00 #x00 #x00 #x00 #x00 #x00 #x39))
		(:method-id . ,(vector #x09 #x90 #xec #xd8))))
       (packed (bindat-pack spec data)))
  (multibyte-string-p packed))

And because of it being multibyte, when i want to send it over the
wire to a sub process in a binary data format, it gets transformed and
the sub process does not get a byte-by-byte equivalent of the
concatenation of the 2 vectors above. I have tried using
string-as-unibyte and the effect is still the same.

-- 
Cheers,
Phuah Yee Keat
This bug report was last modified 16 years and 23 days ago.

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