I downloaded the source code of
wget from http://ftp.gnu.org/gnu/wget/ (file wget-1.14.tar.gz). Is there any place where I can read to understand the whole structure of the source code? I can't find any such file in what I downloaded.
If you are not able to get documentation you can generate one using softwares like .Doxygen
It can help you in three ways:
It can generate an on-line documentation browser (in HTML) and/or an off-line reference manual (in ) from a set of documented source files. There is also support for generating output in RTF (MS-Word), PostScript, hyperlinked PDF, compressed HTML, and Unix man pages. The documentation is extracted directly from the sources, which makes it much easier to keep the documentation consistent with the source code. You can configure doxygen to extract the code structure from undocumented source files. This is very useful to quickly find your way in large source distributions.
You can also visualize the relations between the various elements by means of include dependency graphs, inheritance diagrams, and collaboration diagrams, which are all generated automatically.
You can also use doxygen for creating normal documentation