From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Joe Riel <joer@san.rr.com>
Cc: help-gnu-emacs@gnu.org
Subject: Re: Replacement for string-as-unibyte-function
Date: Mon, 01 Feb 2021 10:01:22 -0500 [thread overview]
Message-ID: <jwv8s87n8fv.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <20210131215555.547fb92e@gauss> (Joe Riel's message of "Sun, 31 Jan 2021 21:55:55 -0800")
>> So make sure the buffer in which the process writes is unibyte with
>>
>> (set-buffer-multibyte nil)
>>
>> and make sure Emacs doesn't try to decode the process's output:
>>
>> (set-process-coding-system <proc> 'binary)
>>
>> (which you can also set directly when you launch the process, but how
>> you do it depends on the function you use to create the process).
>
> I'm actually using make-network-process (to communicate via tls).
Then use something like
(make-network-process ... :coding 'binary ...)
or
(make-network-process ... :coding '(binary . utf-8) ...)
> The filter function inserts the string into a buffer.
Emacs receives the data from the process as a sequence of *bytes* (after
all, that's the only thing available in POSIX communication). So in
order to pass a sequence of *chars* (aka "a multibyte string") to the
process filter, Emacs's internal C code has to do the equivalent of
(*de*code-coding-string "thedatareceived" '<somecodingsystem>)
where <somecodingsystem> is the coding system that
`make-network-process` decided to use for that process.
And then you come along and want to call `encode-coding-string` on the
result: better use `:coding` as I suggested above in order to cut the
middle man.
Stefan
next prev parent reply other threads:[~2021-02-01 15:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-31 23:01 Replacement for string-as-unibyte-function Joe Riel
2021-02-01 3:03 ` Stefan Monnier
2021-02-01 5:55 ` Joe Riel
2021-02-01 14:53 ` Eli Zaretskii
2021-02-01 16:33 ` Joe Riel
2021-02-01 17:05 ` Eli Zaretskii
2021-02-01 23:43 ` Joe Riel
2021-02-02 3:30 ` Eli Zaretskii
2021-02-02 3:51 ` Joe Riel
2021-02-02 14:58 ` Eli Zaretskii
2021-02-01 15:01 ` Stefan Monnier [this message]
2021-02-01 16:05 ` <somecodingsystem> (was: Re: Replacement for string-as-unibyte-function) moasenwood--- via Users list for the GNU Emacs text editor
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