Re: How to convert UInt8 array to NSString
Re: How to convert UInt8 array to NSString
- Subject: Re: How to convert UInt8 array to NSString
- From: Jens Alfke <email@hidden>
- Date: Tue, 6 May 2008 19:22:15 -0700
On 6 May '08, at 10:45 AM, Aki Inoue wrote:
Actually, I don't recommend using CP1252 as the generic fallback
encoding like this.
The encoding does have gaps, and the handling of those invalid gaps
varies between conversion engines. CF/NSString treat the invalid
bytes strictly and return nil encountering those.
I wasn't aware it had gaps — I've never run into them. Where are they?
So, our recommendation now is to try UTF-8 first; then, try some
other encoding deduced from the context (user's localization,
intended source/destination of the data, etc). If all failed,
should try MacRoman as the ultimate fallback (the encoding has no
gap so never fails).
In the contexts I've been dealing with — data fetched over HTTP from
random websites — there hasn't been anything deducible from the
context (assuming the HTTP Content-Type already failed.) In that
situation MacRoman is not at all a good fallback as almost no Web
content uses it; CP-1252 or ISO-Latin-1 are the most likely fallbacks
after UTF-8.
—Jens
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