[fpc-devel] FPC 2.3.1 seems a mixed mess with Unicode support

[Jonas Maebe]

On 16 Sep 2009, at 16:34, Michael Schnell wrote:

> Does the FPC rtl compare two unicode-strings a and b as equal with
> "if a=b ..."
> even when both print as "ä" and one is coded as a single character and
> the other is coded as an a and a " double dot superscript" ?

No, it just compares the literal bytes (and it will probably keep  
doing so forever, both for Delphi and for backwards compatibility).

> How should it do that ? it would need a table of the codings of all
> possible multi-unicode-character encodings ?

The way to implement stuff like that is to call the appropriate  
library functions. It makes no sense to completely re-implement  
everything in the RTL.

Such API-calls can of course be wrapped by the RTL, similar to the way  
there are already function such as sysutils.ansicomparestr()/ 
sysutils.ansicomparetext()/... etc. These also simply call through to  
OS-supplied functionality.


Jonas