Fstream Library Structure Help

[wonopon]

Hey, I'm working on a C++ file opening library that implements I/O and several useful functions and that also supports Rich Text Document Formats such as : (*.doc, *.docx, *.odt, etc). Currently, I'm working on retrieving a file's data, and converting it into a understandable syntax. However, I'm a bit stuck. I would appreciate it very much if anyone could please provide an explanation of how the "fstream" library works (or any other file I/O library) and any important classes used to enable file operations.

Thanks so much for your help everyone =)