[fpc-pascal] FPC 3: disabling automatic AnsiString codepage conversion

[Tobias Giesen]

Hello,

my application uses the AnsiString type to store UTF-8 data. That was
totally fine. Now in FPC 3, automatic conversions cause data loss. I
get question marks replacing Chinese characters, for example.

I do not fully understand at which points these conversions are done.
The FPC 3 Unicode documentation says something about "passing it to a
RTL routine".

What about this code:
var a,b:Ansistring;
begin
  a:=Utf8Encode(AWideString);
  b:=Copy(a,1,10);
  end;

Is "Copy" an RTL routine? Is this OK or not?

Best for me would be to be able to turn the conversions off completely.
Is that possible?

Cheers,
Tobias