Where can I found C or C++ source code for a file structure identifier ?

To: <exelist@yahoogroups.com>
Subject: Where can I found C or C++ source code for a file structure identifier ?
From: "Senna Spy" <sennaspy@...>
Date: Fri, 30 Mar 2001 07:32:32 -0300

Hi all !

I need identify compressed (zip, lha, arj, ace, rar),

setup makers (install shield, wise installer, inno setup)

and self-extractors (winrar, winace, winzip)

Thanks

[]'s

Senna Spy