[Bug localedata/13061] New: iconv mapping of 0xA8 0xEC in CP1258 is non-canonical

[Bug localedata/13061] New: iconv mapping of 0xA8 0xEC in CP1258 is non-canonical

[bruno at clisp dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=13061

           Summary: iconv mapping of 0xA8 0xEC in CP1258 is non-canonical
           Product: glibc
           Version: 2.14
            Status: NEW
          Severity: normal
          Priority: P2
         Component: localedata
        AssignedTo: libc-locales@sources.redhat.com
        ReportedBy: bruno@clisp.org


Bug 12777 <http://sourceware.org/bugzilla/show_bug.cgi?id=12777>
was fixed to map U+0385 (like U+1FEE) to 0xA8 0xEC. Good.

But at the same time, in the reverse direction, 0xA8 0xEC ought to map to
U+0385, not to U+1FEE. Why?

1) http://www.unicode.org/charts/PDF/U1F00.pdf states
that the decomposition of U+1FEE is U+0385. That is, U+0385 is a "simpler"
Unicode character than U+1FEE, although both look very similar
(cf. http://www.unicode.org/charts/PDF/U1F00.pdf and
http://www.unicode.org/charts/PDF/U0370.pdf).

2) According to http://www.unicode.org/versions/Unicode6.0.0/ch07.pdf,
the block U+0370..U+03FF is more for modern Greek, whereas the block
U+1F00..U+1FFF is mostly for ancient Greek. But CP1258 is about modern Greek.

To reproduce:

$ printf '\xA8\xEC' | iconv -f CP1258 -t UCS-4LE | od -t x4
0000000 00001fee
0000004

Should be:

$ printf '\xA8\xEC' | iconv -f CP1258 -t UCS-4LE | od -t x4
0000000 00000385
0000004

Attached is probable fix (untested).

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[Bug localedata/13061] iconv mapping of 0xA8 0xEC in CP1258 is non-canonical

[bruno at clisp dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=13061

--- Comment #1 from Bruno Haible <bruno at clisp dot org> 2011-08-06 16:35:06 UTC ---
Created attachment 5878
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5878
proposed fix

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[Bug localedata/13061] iconv mapping of 0xA8 0xEC in CP1258 is non-canonical

[drepper.fsp at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13061

Ulrich Drepper <drepper.fsp at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |drepper.fsp at gmail dot
                   |                            |com
         Resolution|                            |FIXED

--- Comment #2 from Ulrich Drepper <drepper.fsp at gmail dot com> 2011-12-23 13:44:13 UTC ---
I applied the patch.

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[Bug localedata/13061] iconv mapping of 0xA8 0xEC in CP1258 is non-canonical

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=13061

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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