<i18n dev> Supporting charset GB18030-2005

[Alan Bateman]

On 15/11/2021 17:53, Pushkar N Kulkarni wrote:
> Hi there,
>
>
> OpenJDK currently supports version 2000 of the GB18030 (https://en.wikipedia.org/wiki/GB_18030) character set viz. GB18030-2000. The character mappings corresponding to Unicode codepoints '\u1E3F' and '\uE7C7' were swapped in a new version of the character set named GB18030-2005. I learn that this corrected a mistake in version 2000.
>
> OpenJDK does not support version 2005 as yet. Can someone please help me with reasons for the same, if any?
>
> We do have users requesting for 2005 support. While Linux (RHEL 7/8) has moved to supporting GB18030-2005 via glibc, Windows 10 and AIX 7.2 still have GB18030-2000 base. That means OpenJDK cannot move to GB18030-2005 base as yet. However, we can support both the versions until all the supported platforms move to GB18030-2005 base. Would that be an acceptable proposition?
>
> If we can have an enhancement request opened, I'd be glad to contribute the GB18030-2005 charset implementation.

If I read this correctly, then your proposal is for GB18030 to continue 
to be GB18030-2000 but you would introduce a new charset GB18030 map to 
GB18030-2005 for the new version. Are you also proposing a system 
property or some means to have GB18030 be GB18030-2005 until the time is 
right to make it the default?

-Alan