Write large file

Question

I try to write to a large file, but it seems like it does not work for files larger than 2GB. I have tried with boost::iostreams::file_sink. Is this just a limit with the boost

Answer 1

In Win32/64 the ReadFile & WriteFile can write files larger than 4gb. The positioning is done via a 64bit _LARGE_INTEGER value in SetFilePointerEx. Likewise to get the file size you need GetFileSizeEx and not the basic GetFileSize.