+(defmacro gnus-date-get-time (date)
+ "Convert DATE string to Emacs time.
+Cache the result as a text property stored in DATE."
+ ;; Either return the cached value...
+ `(let ((d ,date))
+ (if (equal "" d)
+ '(0 0)
+ (or (get-text-property 0 'gnus-time d)
+ ;; or compute the value...
+ (let ((time (safe-date-to-time d)))
+ ;; and store it back in the string.
+ (put-text-property 0 1 'gnus-time time d)
+ time)))))
+