does the redirect location match this regexp pattern?

Source Code

# File action_controller/test_process.rb, line 200
def redirect_url_match?( pattern )
  return false if redirect_url.nil?
  p = Regexp.new(pattern) if pattern.class == String
  p = pattern if pattern.class == Regexp
  return false if p.nil?
  p.match(redirect_url) != nil
end