[fpc-pascal] Some RTL functions cry big tears when mixing Pchar and Ansistring/String

[Marco van de Voort]

In our previous episode, md at rpzdesign.com said:
> As for 2 examples:
> 
> res := PosEx(mypchar,'NEEDLE',35) ;
> 
> res := Copy (mypchar, 10,15) ;

These are not examples. These are snippets. Examples I can compile and
debug. 
 
> What are the byte boundaries here?
> Zero Based from the pointer?

I think it will scan the pointer till a zero character, and then copy that
to an ansistring. Next pass the ansistring to posex.