[fpc-pascal] UTF-8 versions of Copy() and Length()

[Florian Klaempfl]

Graeme Geldenhuys schrieb:
> On 5/19/07, Daniël Mantione <daniel.mantione at freepascal.org> wrote:
>> > Does FPC have UTF-8 versions of the Copy() and Length() functions?
>>
>> They don't exist. FPC has been designed to either use the system encoding
>> (which can be utf8). In this case, the string routines from sysutils do
>> what you want. The other option is to use widestrings;
>> length(utf8decode(s)) will return the length of an utf-8 string.
> 
> Sorry, I'm very new to Unicode support.  Wouldn't it be useful to have
> UTF-8 and UTF-16 (and all the other encodings) functions in FPC? 

It's not that easy, for example upper/lower casing, comparing etc. of
unicode requires usually external big tables which we don't want to pull
into fpc.

> For
> example the Lazarus LCL (LCLProc unit) has loads of such functions.
> 
> The Length function is easy to get around, but the Copy, Pos ,etc
> functions are not.
> 
> 
>