[Bug 26632] MultiByteToWideChar with MB_ERR_INVALID_CHARS doesn't fail for some code points.

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=26632

--- Comment #10 from Sagawa <sagawa.aki+winebugs at gmail.com> 2011-04-03 01:10:11 CDT ---
(In reply to comment #8)
> ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP932.TXT
> specifically marks 0xA0, 0xFD, 0xFE and 0xFF as #UNDEFINED, our parser
> needs to mark those as invalid somehow.

Yes that's right.

Please note 0x80 is also marked as #UNDEFINED in CP932.TXT. But
MultiByteToWideChar with MB_ERR_INVALID_CHARS doesn't complain it.

The big difference between them is that 0xA0, 0xFD, 0xFE and 0xFF are mapped
into Private Unicode Area in bestfit932.txt[1], 0x80 is not.

[1] ...
ftp://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WindowsBestFit/bestfit932.txt

I wrote a proposed patch using this observation.

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