Re: converting octal escape sequences to utf-8 and back

[Michael Welsh Duggan <md5i@md5i.com>]

"Roland Winkler" <winkler@gnu.org> writes:

> On Sun May 29 2011 Michael Welsh Duggan wrote:
>> As Leo says:
>> 
>> (encode-coding-string "§" 'utf-8)
>> "\302\247"
>> (decode-coding-string "\302\247" 'utf-8)
>> "§"
>
> The decoding seems to work fine this way, but not the encoding.
> If I start out with the 8-character ascii string "\302\247" the
> following does not give me back this 8-character string:
>
> (with-temp-file "~/foo.txt"
>     (insert (encode-coding-string
>              (decode-coding-string "\302\247" 'utf-8) 'utf-8)))
>
> This will ask me for the coding system I want, suggesting the
> default 'raw-text. Then I end up with a file that has only two
> bytes, instead of the eight bytes I want. 

(with-temp-file "~/foo.txt"
  (insert (substring (prin1-to-string 
                      (encode-coding-string 
                       (decode-coding-string "\302\247" 'utf-8)'utf-8)) 
                     1 -1)))

-- 
Michael Welsh Duggan
(md5i@md5i.com)