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Re: UTF-8 problem: non-UTF-8 in a UTF-8 locale

From: Philip Martin <philip_at_codematters.co.uk>
Date: 2004-02-06 16:11:38 CET

Florian Weimer <fw@deneb.enyo.de> writes:

> Philip Martin wrote:
>> UTF-8 is defined by RFC2279, but it appears the GNU iconv uses the
>> more restrictive rules defined by Unicode, such as found in section
>> 3.9 of http://www.unicode.org/versions/Unicode4.0.0/bookmarks.html
> RFC 2279 has been superseded by RFC 3629, which contains basically the
> same rules.
> I agree that such checks are necessary to prevent repository corruption.
> I'm not sure if your checks are sufficient, though; do you handle
> surrogate pairs and other invalid UTF-8 sequences, too (apart from
> overlong UTF-8 sequences)?

My code implement the "well-formed UTF-8 bytes sequence" rules defined
by Unicode. These are the same as the rules in section 4 of RFC 3629,
and that section of the RFC states "The authoritative definition of
UTF-8 is in [UNICODE]". My code will detect anything that doesn't
conform to these rules, that includes overlong sequences, incomplete
sequences and non-minimal sequences.

Philip Martin
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Received on Fri Feb 6 17:12:40 2004

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