[debbugs-tracker] bug#10919: closed (emacs-mule/utf-8 difference)

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Your message dated Thu, 01 Mar 2012 19:54:48 +0200
with message-id <address@hidden>
and subject line Re: bug#10919: emacs-mule/utf-8 difference
has caused the debbugs.gnu.org bug report #10919,
regarding emacs-mule/utf-8 difference
to be marked as done.

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10919: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10919
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> --- Begin Message ---
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>
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> Subject: 
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> emacs-mule/utf-8 difference
>
>
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>
> Date: 
>
> Thu, 01 Mar 2012 16:39:57 +0100
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> User-agent: 
>
> Mozilla/5.0 (X11; U; Linux x86_64; en-US;	rv:1.9.2.24) Gecko/20111109 Thunderbird/3.1.16
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>
>
>
> Hi,
>
> I have a problem regarding coding systems:
>
> I'm using process-send-string to send substrings of a buffer through a 
> socket, after setting the process encoding and decoding systems to 
> emacs-mule.
> I expect the number of bytes written to match the byte-length of the 
> substring as obtained by position-bytes, since the specification of 
> position-bytes in emacs-devel is to always work with the emacs-mule 
> encoding. From emacs-devel:
>
> "The byte sequence of a buffer after decoded is always in emacs-mule (in 
> emacs-unicode-2 branch, it's utf-8).  So, changing 
> buffer-file-coding-system or any other coding-system-related variables 
> doesn't affects position-bytes."
>
> However, this is not the case with 3bytes utf8 characters: 
> position-bytes counts them as 3 bytes, but process-send-string wirtes 4 
> bytes.
>
> Setting the process coding systems for the socket to utf-8 solves the 
> problem, but I don't think it will with other coding systems, even if I 
> used buffer-file-coding-system instead, since position-bytes does not 
> use it.
>
> What is the real expected behavior of these things, and how to make this 
> correct ?
>
> Regards,
>
> Tiphaine Turpin
>
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#10919: emacs-mule/utf-8 difference
>
>
>
>
> Date: 
>
> Thu, 01 Mar 2012 19:54:48 +0200
>
>
>
>
> > Date: Thu, 01 Mar 2012 16:39:57 +0100
> > From: Tiphaine Turpin <address@hidden>
> > 
> > From emacs-devel:
> > 
> > "The byte sequence of a buffer after decoded is always in emacs-mule (in 
> > emacs-unicode-2 branch, it's utf-8).
>
> This is very old info.  The emacs-unicode-2 branch was merged with the
> mainline when Emacs 23.1 was released.
>
> > So, changing 
> > buffer-file-coding-system or any other coding-system-related variables 
> > doesn't affects position-bytes."
> > 
> > However, this is not the case with 3bytes utf8 characters: 
> > position-bytes counts them as 3 bytes, but process-send-string wirtes 4 
> > bytes.
>
> process-send-string _encodes_ the string, it does not send the
> internal representation of the string in the buffer.  Using
> process-send-string is like writing the string to a disk file: Emacs
> encodes it before sending or writing.
>
> Therefore, buffer-file-coding-system _does_ affect what is being sent.
>
> I'm closing this non-bug.
>
>
> --- End Message ---