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From: "bruno at clisp dot org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug locale/30243] GB18030-2022 is not supported!
Date: Sat, 20 May 2023 22:52:10 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30243

Bruno Haible <bruno at clisp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bruno at clisp dot org

--- Comment #2 from Bruno Haible <bruno at clisp dot org> ---
Created attachment 14890
  --> https://sourceware.org/bugzilla/attachment.cgi?id=3D14890&action=3Ded=
it
mapping tables

The official GB18030-2022 mapping table can be downloaded from
http://www.nits.org.cn/index/article/4034 (two data files).

The difference between GB18030-2005 and GB18030-2022, regarding the mapping
tables, is that GB18030-2022 gets rid of a PUA (private use area) mapping of
some characters that were not part of Unicode in 2005 but are in Unicode
nowadays. In other words, these PUA mappings are considered obsolete.

Find attached a tar file with
1) The current mapping tables from glibc (extracted from glibc 2.35, but it
hasn't changed since then),
2) The mapping tables from GNU libiconv.
The <encoding>.TXT files describe the multibyte to Unicode conversion
direction; the <encoding>.INVERSE.TXT files describe the Unicode to multiby=
te
conversion direction.

What needs to be done in glibc?

* For the multibyte to Unicode conversion direction: Look at "diff -u
glibc-2.35-iconv/GB18030.TXT libiconv/GB18030-2022.TXT"
  - Mappings for 0x82359037..0x82359134 and 0x84318236..0x84318335 need to =
be
added.
  - The mappings of 0xFE51, 0xFE52, 0xFE53, 0xFE6C, 0xFE76, 0xFE91 need to =
be
changed.

* For the Unicode to multibyte conversion direction: Look at "diff -u
glibc-2.35-iconv/GB18030.INVERSE.TXT libiconv/GB18030-2022.INVERSE.TXT"
  - Mappings for U+E81E, U+E826, U+E82B, U+E82C, U+E832, U+E843, U+E854,
U+E864, U+E78D..U+E796 need to be added.
  - The mappings of U+20087, U+20089, U+200CC, U+215D7, U+2298F, U+241FE ne=
ed
to be changed.
  - Mappings for U+E816, U+E817, U+E818, U+E831, U+E83B, U+E855 need to be
added.

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