How to put this in a macro

[Cecil Westerhof]

In my code I use the following code on several places:
    (if (equal start end)
        (setq start (point-min)
              end   (point-max))
      (setq start (or start (point-min)))
      (setq end   (or end   (point-max))))

I think it would be good to put this in a macro. How would I write a
macro for this code?

Or could it be done with a function?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof