Re: [Boost-users] [date_time] UNICODE and wcout problems

From: fang.wenbiao_at_[hidden]
Date: 2007-05-26 02:11:15

atoi(beg->c_str());

------------------------

From: Kirit Sælensminde <kirit.saelensminde_at_[hidden]>
To: boost-users_at_[hidden]
Sent: 2007-05-26 11:35
Subject: Re: [Boost-users] [date_time] UNICODE and wcout problems

>Filip Konvička wrote:
>> Hi,
>> 
>> in MSVC 8.0 _UNICODE build, after I send a ptime to wcout, I can no 
>> longer print "international" characters. When I use a temporary 
>> wostringstream for printing the ptime, everything is OK. Minimal repro 
>> see below (the "2" at the end is never printed). With some characters 
>> like the "Å¡" in the example, the output is totally cut off; with others, 
>> like "á", the codepage is changed, so the characters are displayed 
>> incorrectly.
>> 
>> Any suggestions?
>
>This is a problem in the MSVC libraries. If you print a character above 
>code 255 then the stream crashes and is good for nothing afterwards. 
>Only std::wstringstream doesn't have this problem.
>
>I think if you buy the Dinkumware libraries this works. The _cputws 
>function does work as you would expect, but it can't be piped. The 
>behaviour also changes if you run the program from a command shell with 
>Unicode turned on ( cmd.exe /u).
>
>I did talk to PJ Plauger about it on clc. This is what he explained:
>
>"When you write to a wofstream, the wchar_t sequence you write gets 
>converted to a byte sequence written to the file. How that conversion 
>occurs depends on the codecvt facet you choose. Choose none any you get 
>some default. In the case of VC++ the default is pretty stupid -- the 
>first 256 codes get written as single bytes and all other wide-character 
>codes fail to write. "
>
>http://groups.google.com/group/comp.lang.c++/browse_thread/thread/3c203253708befb5/1bc5d68887f1a72d?lnk=st&q=&rnum=107
>
>
>Kirit
>
>
>
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