[Bug libc/15736] mismatch between strcasecmp and toupper/tolower in tr_TR.iso88599 locale

["jrnieder at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15736

Jonathan Nieder <jrnieder at gmail dot com> changed:

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                 CC|                            |jrnieder at gmail dot com

--- Comment #1 from Jonathan Nieder <jrnieder at gmail dot com> ---
All that POSIX says on this subject is

        When the LC_CTYPE category of the current locale is from the
        POSIX locale, strcasecmp() and strncasecmp() shall behave as
        if the strings had been converted to lowercase and then a byte
        comparison performed. Otherwise, the results are unspecified.

I guess that makes it a matter of taste what the results should be. :(

I would have expected the following:

        10 INF
        10 ÄNF
        10 ÄnF
        10 Änf
        01 inf
        01 Änf
        01 ÄNf
        01 ÄNF

That's because i and Ä are different letters in Turkish, whose
capitalized equivalents are Ä and I.

Is there some standard that makes sense of this stuff?

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