Re: Unicode and GNUstep (more info)

[Richard Frith-Macdonald]

On Friday, May 10, 2002, at 03:26 PM, Andreas Hoeschler wrote:

> Hi all,
>
> the following program
>
>        NSString *string = @"Höschler";
>        NSLog(@"char: %d", [string characterAtIndex:1]);
>
> returns
>
>         FBTest[12919] char: 246
>
> on MacOSX which is correct and
>
>         FBTest[3076] char: 154
>
> which is incorrect. How can this be fixed?

Two things ...

1. On my copy of GNUstep (Debian, Intel), the above test program prints 
'char: 246' as
it does on your MacOS-X system.

2. What you are doing is actually illegal ... the contents of a constant 
literal string created using
the @"" syntax are supposed to be ascii (ie 7-bt characters with the 
eighth bit clear).  The behavior
when you use non-ascii characters is undefined.


That being said ...

The ö character has the value 246 in both unicode and ISO latin 1
The GNUstep default character encoding for C-strings is Latin 1

So it should (and on mys system does) work as you are expecting as long 
as you have not changed
your default encoding (GNUSTEP_STRING_ENCODING environment variable), 
assuming you are using an
up to date copy of GNUstep of course.


So, if the GNUSTEP_STRING_ENCODING setting is not your problem, and you 
are using up to date
software, it would be interesting to know about your machine/os, 
compiler etc.