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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: suggestion: function: buffer-bytes
Date: Sun, 01 Jul 2007 22:34:55 +0300
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Cc: emacs-devel@gnu.org, raman@users.sourceforge.net
To: Kenichi Handa <handa@m17n.org>
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In-reply-to: <E1I4uhR-0004Gf-45@etlken.m17n.org> (message from Kenichi Handa
	on Sun, 01 Jul 2007 17:22:29 +0900)
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> From: Kenichi Handa <handa@m17n.org>
> Date: Sun, 01 Jul 2007 17:22:29 +0900
> Cc: emacs-devel@gnu.org, monnier@iro.umontreal.ca, raman@users.sourceforge.net
> 
> In emacs-unicode-2, you can use a little bit faster version.
> 
> (defun buffer-encoded-size (&optional buffer coding)
>   "Return the encoded size of the current byffer in bytes.
> ..."
>   (save-excursion
>     (and buffer (set-buffer buffer))
>     (or coding
> 	(setq coding buffer-file-coding-system))
>     (length (encode-coding-region (point-min) (point-max) coding t))))

Why can't he use this version in Emacs 22?