From: "rmagick@..." <rmagick@...>
Date: 2006-02-09T04:03:22+09:00
Subject: Re: c extension: symbols

A lot of the C extension API is undocumented. If you're going to be
creating extensions you'll probably find it's worth your time to look
at the external declarations and macros in ruby.h and intern.h, and
then looking at the code in the Ruby iterpreter itself. I've found that
the best way to find out how to use the API is to look at the code for
the builtin classes like Array and String.