Boost C++ Libraries: Ticket #3088: Support of std::wstring versions of boost::iostreams::basic_file::open()

anonymous — Tue, 09 Jun 2009 22:34:52 GMT

Agreed... On Windows with msvc 2008, we end up doing something like:

wchar_t wideFile = L"example.txt"; // file we want to open with boost
std::string  fileName;
// first call gets buffer size
int bufSize = ::WideCharToMultiByte(CP_ACP, 0, wideFile, -1,
                                    NULL, 0, NULL, NULL);
fileName.resize (bufSize);
// second call converts the filename
int iRet = ::WideCharToMultiByte(CP_ACP, 0, wideFile, -1,
                                 &fileName.at(0), bufSize, NULL, NULL);
boost::iostreams::file_sink(fileName.c_str(), ...)

anonymous — Wed, 24 Jun 2009 12:45:15 GMT

The code snipped anbove only works if all the characters in the filename are available in CP_ACP, which is not the case for most japanese characters in the usual 850 codepage. A native support of std::wstring would be much better if the implementation of the STL supports std::basic_fstream(const wchar_t *_Filename...)

status changed; resolution set

Steven Watanabe — Thu, 17 Jun 2010 13:42:18 GMT

status new → closed
resolution → wontfix

Since file_sink relies on std::streambuf which doesn't support wide character open, this is not feasible. file_descriptor, however, does handle wide paths (via boost::filesystem::path).