From: Zefram <zefram@fysh.org>
To: 22910@debbugs.gnu.org
Subject: bug#22910: read-only setlocale has side effect
Date: Fri, 4 Mar 2016 16:48:59 +0000 [thread overview]
Message-ID: <20160304164859.GE7946@fysh.org> (raw)
A call to setlocale with no second argument is documented to be
a read-only operation, querying the current locale configuration.
In fact it has a side effect of setting the encoding on primordial ports:
$ guile-2.0 -c '(write (port-encoding (current-input-port))) (newline) (setlocale LC_TIME) (write (port-encoding (current-input-port))) (newline)'
#f
"ANSI_X3.4-1968"
Observe that this occurs even if the locale reading operation is for a
category unrelated to character encoding. The actual decoding behaviour
of read-char is altered in accordance with the reported encoding.
Non-primordial ports opened before or after the setlocale call are
not affected.
-zefram
next reply other threads:[~2016-03-04 16:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-04 16:48 Zefram [this message]
2016-03-04 19:55 ` bug#22910: read-only setlocale has side effect Zefram
2016-08-07 21:58 ` Andy Wingo
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