exfat upcase table for code points above U+FFFF (Was: Re: [PATCH] staging: exfat: add exfat filesystem code to staging)

Pali Rohár
2020-04-21T21:30:50Z

On Thursday 13 February 2020 16:18:47 Sasha Levin wrote:
> On Thu, Feb 13, 2020 at 01:06:56AM +0100, Pali Rohár wrote:
> > In released exFAT specification is not written how are Unicode code
> > points above U+FFFF represented in exFAT upcase table. Normally in
> > UTF-16 are Unicode code points above U+FFFF represented by surrogate
> > pairs but compression format of exFAT upcase table is not clear how to
> > do it there.
> >
> > Are you able to send question about this problem to relevant MS people?
> >
> > New Linux implementation of exfat which is waiting on mailing list just
> > do not support Unicode code points above U+FFFF in exFAT upcase table.
>
> Sure, I'll forward this question on. I'll see if I can get someone from
> their team who could be available to answer questions such as these in
> the future - Microsoft is interested in maintaining compatiblity between
> Linux and Windows exFAT implementations.

Hello Sasha! Have you got any answer from exfat MS team about upcase
table for Unicode code points above U+FFFF?