Re: [PATCH 2/2] send-email: rfc2047-quote subject lines with non-ascii characters

On Sat, Mar 29, 2008 at 09:41:53AM +0100, Robin Rosenberg wrote:

quoted

OK. Do you have an example function that guesses with high probability
whether a string is utf-8? If there are non-ascii characters but we
_don't_ guess utf-8, what should we do?

Any test for valid UTF-8 will do that with a very high probability. The
perl UTF-8 "api" is a mess. I couldn't find such a routine!?. Calling 
decode/encode and see if you get the original string works, but that is too
clumsy, IMHO.

Does that work? I would think you would have to compare the normalized
versions of each string, since decode(encode($x)) is not, AIUI,
guaranteed to produce $x.

-Peff