low-level reading of file inside an archive?

Hi all,

is there a way to do something like this:

read n bytes at offset t of file path/to/my/file.ext inside a DAR
archive and put the result into a std::string or char* or something?

I would like to implement a read-only FUSE file system to look inside
DAR archives, and I need to perform this kind of basic I/O operations
without extracting real files to temporary  directories (and then make
the I/O on the file) because this would be highly inefficient.

Thank you very much!

-- 
Guido De Rosa

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