C Programming Question: Cross Operating System, Large File IO?

Does anyone know if there is a decent method to perform cross operating system file I/O for large files (greater than 2GB) that works well on Windows,BSD,Linux,OSX.<p>POSIX's open,read,write,close is great and works on all except Windows. I have found CreateFile,ReadFile,WriteFile, but this is a totally different format in style and data types.<p>Thanks!