OSream.cpp

class OStream::PrivateData
{
private:
    char filestreamBuffer[STREAM_BUF_SIZE];

public:
    PrivateData(const std::string & iFileName) :
        stream(NULL), fileName(iFileName), startPos(0)
    {
        std::ofstream * filestream = new std::ofstream(fileName.c_str(),
            std::ios_base::trunc | std::ios_base::binary);
        if (filestream->is_open())
        {
            stream = filestream;
            stream->rdbuf()->pubsetbuf( filestreamBuffer, STREAM_BUF_SIZE );
            stream->exceptions ( std::ofstream::failbit |
                                 std::ofstream::badbit );
        }
        else
        {
            filestream->close();
            delete filestream;
        }
    }