Re: [Log4cplus-devel] Unicode Text Logging

[Václav Z. <vha...@gm...>]

On 06/06/2012 07:30 PM, vvv jjj wrote:
> Hi log4cplus-devel Team
>
> Regarding Unicode support, I impemented a null codeset and imbued to
> file stream as mentioned in the url
> (http://forums.codeguru.com/showpost.php?p=1741409&postcount=8) in
> FileAppender file in FileAppender::open method. Also changed the open
> mode of stream with binary option enabled in FileAppender file.
>
> Please let me know if the above approach has any issues.
I think that it is a viable option.

Personally, I would suggest using Boost's utf8_codecvt_facet, see
<http://www.boost.org/doc/libs/1_49_0/libs/serialization/doc/codecvt.html>.

>
> Thanks
> J.Viswanath
>
> ------------------------------------------------------------------------
> *From:* vvv jjj <vv...@ya...>
> *To:* Václav Zeman <vha...@gm...>
> *Cc:* "log...@li..."
> <log...@li...>
> *Sent:* Friday, 1 June 2012 10:21 PM
> *Subject:* Re: [Log4cplus-devel] Unicode Text Logging
>
> Hi log4cplus Devel Team,
>
> Thanks Václav Zeman for the detailed explanation.
>
> I understood that the problem is not with log4cplus library but it is
> the behavior of stream in c++. I will try the deriving the
> FileAppender and check the output or may be I change the code in
> log4cplus as I'm using both RollFileAppender and DailyRollFileAppender.  
>
> Regarding the 2nd options imbue I'm using Visual Studio 2008, so need
> to check if that options work or not.
>
> Thanks again to log4cplus team for giving good support.
>
> Regards
> J.Viswanath
>
> ------------------------------------------------------------------------
> *From:* Václav Zeman <vha...@gm...>
> *To:* vvv jjj <vv...@ya...>
> *Cc:* log...@li...
> *Sent:* Friday, 1 June 2012 6:52 PM
> *Subject:* Re: [Log4cplus-devel] Unicode Text Logging
>
> On 31 May 2012 19:21, Václav Zeman wrote:
> > On 05/31/2012 05:46 PM, vvv jjj wrote:
> >> Hi log4cplus Devel Team,
> >>
> >> Thanks Václav Zeman.
> >>
> >> I gave Unicode text directly in the cpp file. (Ex: CString str =
> >> _T("Ω⅓∂₤◊");)
> >> The file is saved with unicode support (the default yes button when
> >> Unicode file is saved in Visual Studio 2008). The configuration used
> >> is Debug Unicode dynamic library.
> >>[...]
> I have reproduced your problem on Windows as well. The problem is
> Windows problem with its code pages.
>
> Even though you are using the Debug_Unicode (or Release_Unicode)
> configuration, which means that the output stream is std::wfstream,
> the output file is always using chars (not wchar_ts). If you insist on
> logging characters outside of your Windows code page, then you are
> unfortunately (nearly) out of luck for 1.0.4.1.
>
> The best way to work around this for 1.0.4.1 would be to derive your
> own appender from *FileAppender that you use and either (1) override
> its append() member function to do, either wchar_t -> UTF-8 (or any
> other translation) on the fly, or, if you can use Visual Studio 2010,
> (2) imbue the underlying file stream with, e.g.,
> std::codecvt_utf8<tchar, 0x10FFFF,
> static_cast<std::codecvt_mode>(std::consume_header |
> std::little_endian)> facet.
>
> For trunk and 1.1.x branches you can do (2) using imbue() member
> function on *FileAppender.
>
> -- 
> VZ
-- 
VZ