From: "Ludovic Courtès" <ludo@gnu.org>
To: Rob Browning <rlb@defaultvalue.org>
Cc: 56413@debbugs.gnu.org
Subject: bug#56413: [PATCH 1/1] scm_i_utf8_string_hash: compute u8 chars not bytes
Date: Mon, 07 Nov 2022 14:07:54 +0100 [thread overview]
Message-ID: <87tu3aud3p.fsf@gnu.org> (raw)
In-Reply-To: <87zgd3vpb7.fsf@trouble.defaultvalue.org> (Rob Browning's message of "Sun, 06 Nov 2022 13:46:36 -0600")
Rob Browning <rlb@defaultvalue.org> skribis:
> So this change *could* alter results, but only for non-ASCII strings,
> and those results would have been wrong (i.e. relying on uninitialized
> memory).
OK, that was my understanding too.
> That leaves the size_t -> long change in scm_i_str2symbol(), and I don't
> think that has anything to do with UTF-8, but it could cause mangling of
> the value on any platform where the data types differ sufficiently, and
> then of course if we're not using the same type consistently, then we
> could give different answers for the same symbol in different contexts
> (for different code paths).
Right. This one looks safe to me.
> And indeed, looks like I missed another case; just below in
> scm_i_str2uninterned_symbol() we also use size_t. For now, I suspect we
> should change both or neither, and definitely change them all to match
> "eventually".
Sure.
Thanks!
Ludo’.
next prev parent reply other threads:[~2022-11-07 13:07 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-06 1:23 bug#56413: [PATCH 1/1] scm_i_utf8_string_hash: compute u8 chars not bytes Rob Browning
2022-07-06 3:04 ` Rob Browning
2022-11-05 22:18 ` Ludovic Courtès
2022-11-06 16:44 ` Rob Browning
2022-11-06 17:45 ` Rob Browning
2022-11-07 13:06 ` Ludovic Courtès
2022-11-06 19:46 ` Rob Browning
2022-11-07 13:07 ` Ludovic Courtès [this message]
2022-11-08 5:05 ` Rob Browning
2022-11-08 10:09 ` Ludovic Courtès
2023-03-05 22:21 ` bug#56413: [PATCH v2 " Rob Browning
2023-03-06 16:39 ` Ludovic Courtès
2023-03-12 19:30 ` bug#56413: [PATCH v3 " Rob Browning
2023-03-13 11:29 ` Ludovic Courtès
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