def ruby_gnome2_version(glib_source_directory=nil)
glib_source_directory ||= File.join(File.dirname(__FILE__), "..",
"ext", "glib2")
rbglib_h = File.join(glib_source_directory, "rbglib.h")
return nil unless File.exist?(rbglib_h)
version = nil
File.open(rbglib_h) do |h_file|
version_info = {}
h_file.each_line do |line|
case line
when /\A#define RBGLIB_(MAJOR|MINOR|MICRO)_VERSION\s+(\d+)/
version_info[$1] = $2
end
end
version_info = [version_info["MAJOR"],
version_info["MINOR"],
version_info["MICRO"]].compact
version = version_info.join(".") if version_info.size == 3
end
version
end