Re: GNU Emacs 22.0.50 fails to find ä in different ISO Latin encodings

[Peter Dyballa <Peter_Dyballa@web.de>]

Am 22.09.2006 um 02:44 schrieb Miles Bader:

> Peter Dyballa <Peter_Dyballa@web.de> writes:
>> Anyway, what also does not work is: C-s C-q <a non-ASCII, i.e.   
>> greater
>> 177 octal code>. For those with really small keyboards this  is the
>> (almost?) only chance to find some of the x times 64 K  characters in
>> Unicode ...
>
> Eh?  It works for me:
>
> E.g., the Emacs 22 character code of "字" is octal 0156772.
>
> If I enter C-s C-q 0156772 (followed by some other char to  
> terminate the
> octal code), it correctly adds that character to the search string  
> (and
> finds in the buffer).


OK, I did not check in the "higher" Unicode regions, and I did not  
check in an UTF-8 encoded buffer, and I did not input so long numbers  
I cannot compute, I was still in my simple ISO 8859-X test files  
(your example works for me too in an UTF-8 encoded buffer). After  
launching GNU Emacs 22.0.50 with -Q the phenomenon seems to be that  
input like

	C-s C-q <[23][0-7][0-7]> RET

is interpreted as trying to "name/point to" an ISO 8859-1 encoded  
character. For example:

	C-s C-q 245 in ISO 8859-16 does not find ``„´´ (U+201E) – mini- 
buffer tells me that ``¥´´ (\245 in ISO 8859-1) cannot be found.

C-s C-q 241 RET searches for ¡.
C-s C-q 242 RET searches for ¢.
C-s C-q 243 RET searches for £.
C-s C-q 244 RET searches for ¤ (CURRENCY SIGN, U+00A4).

Evaluating (unify-8859-on-decoding-mode t) does not change this  
specific behaviour.



Which is the formula to map octal 0156772 to a Unicode slot/position?  
Octal 0156772 is DDFA in hex, which is different from 5B57, 字's  
position in Unicode. Or: how can I find the octal value for a given  
Unicode slot (U+ABCD)? There is probably some function for this  
purpose ...

--
Greetings

   Pete

"It isn't pollution that's harming the environment. It's the  
impurities in our air and water that are doing it."