R help - Dec 2011 - folders of path - platform independent

Hello,

I'm attempting to get the folders of a path in a robust way (platform
independent, format independent). It has to run on Windows and Linux and
tolerate different formats.

For these: (The paths don't actually exist in Linux but you get the idea.)

Windows:
file_full_path = "C://Program Files//R//R-2.13.1//NEWS.pdf"
file_full_path = "C:\Program Files\R\R-2.13.1\NEWS.pdf"
Linux:
file_full_path = "~/Program FilesR\R-2.13.1\NEWS.pdf"
file_full_path = "/home/username/Program FilesR\R-2.13.1\NEWS.pdf"

I would get for Windows: "C", "Program Files",
"R", "R-2.13.1","NEWS.pdf"
I would get for Linux: "home","username", "Program
Files", "R",
"R-2.13.1","NEWS.pdf"
(The drive and/or home/username aren't necessary, but would be nice to
have. Also, that file name isn't necessary, but would be nice.)

Thank you for your help,

Ben

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