Re: how to find encoding violations in Emacs buffer?

[Peter Dyballa <Peter_Dyballa@Web.DE>]

Am 13.12.2006 um 09:39 schrieb riccardo.murri@gmail.com:

> Yes, but it may be hard to spot one single problematic character in a
> large buffer.  In the case at hand, I had one Latin-1 "ù" in a 20k
> UTF-8 text,

This character is an UTF-8 entity:

	[ù]  00F9  LATIN SMALL LETTER U WITH GRAVE

It cannot be the cause. In UTF-8 it's encoded as C3 B9. Kermit and  
Unicode Emacs 23 have a file UnicodeData.txt that describes a lot of  
Unicode characters. A bit more complete is Kermit's utf8.txt from  
which the above excerpt comes.

>
> Isn't there a way to implement a "goto-next-problematic-char" elisp
> function?  UTF-8 has a rather simple algorithm to detect encoding
> violations, which can point at the precise point where a byte sequence
> violates UTF-8 rules, but I wondered if Emacs had a more general
> interface: if it knows where in the buffer the encoding violations
> are located, one would assume that this information would be available
> at elisp level.

There is something like this already implemented in PostScript  
printing: when the buffer contains characters outside a specific ISO  
Latin encoding up to a dozen of them is presented in a warning buffer.

--
Greetings

   Pete
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