Edward Diener wrote:
> Is there ever any case in which streaming a wstring to a wofstream
> should fail to write all the characters in the wstring to the file ? In
> code, built with VC9 in Windows, I have:
> std::wstring astring;
> // Code that fills the wstring with about 210,000 wide characters.
> // I can verify the size of this in the debugger.
> std::wofstream wofs("somefile",std::ios_base::out |
> std::ios_base::binary); wofs << astring;
i.e.
if(!wofs) {
std::cerr << "somethings fishy" << std::endl;
}
> // wofs gets closed by going out of scope
> When I check the file written it is truncated after about 93000 bytes or
> half that many wide characters.
Or is the wofstream only a front end for a byte based encoding like
utf8 or a JIS variant or..or..or ?
Is the stream properly imbued ? If so to which locale ?
If you use a codecvt facet that does not support the
utf-16/32 code (I assume your wchar_t is meant to
hold unicode) writing might be canceled although
the g++ implementation throws an exception in that case.
(Hmm -- makes me wonder, isn't it forbidden for iostream operations
to throw exceptions ?. Or was there some kind of flags to manipulate
this behavior ?)
> In other cases when streaming a much smaller ( 50 characters or so )
> wstring using a wofstream the output is correct.
> Ideas ? Or just a possible bug in VC9 which I need to duplicate and
> presenrt to Microsoft ?
he retired it's Steve now.
HTH
O.
--
[ See http://www.gotw.ca/resources/clcm.htm for info about ]
[ comp.lang.c++.moderated. First time posters: Do this! ]
