atoi(beg->c_str()); ------------------------ From: Kirit S忙lensminde To: boost-users@lists.boost.org Sent: 2007-05-26 11:35 Subject: Re: [Boost-users] [date_time] UNICODE and wcout problems

Filip Konvi膷ka 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 "拧" in the example, the output is totally cut off; with others, like "谩", 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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