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org-element: Small fix

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* lisp/org-element.el (org-element--cache-generate-key): Small fix.
  Check if UPPER is non nil before comparing its car with 1.  This is
  a safety feature, though, as a key shouldn't end on 0 anyway.
This commit is contained in:
Nicolas Goaziou 2014-06-07 15:32:47 +02:00
parent 73bada5d84
commit 4357dde362
1 changed files with 11 additions and 12 deletions
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17
lisp/org-element.el
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@ -4794,22 +4794,21 @@ the following rules:
(while (and upper (zerop (car upper)))
(push 0 key)
(setq upper (cdr upper)))
;; (n) is equivalent to (n 0 0 0 0 ...) so we want to avoid
;; ending on a sequence of 0.
(if (= (car upper) 1)
(progn (push 0 key)
;; (n) is equivalent to (n 0 0 0 0 ...) so we forbid ending
;; sequences on 0.
(cond ((not upper) (push org-element--cache-default-key key))
((= (car upper) 1)
(push 0 key)
(push org-element--cache-default-key key))
(push (if upper (ash (car upper) -1) org-element--cache-default-key)
key)))
(t (push (ash (car upper) -1) key))))
((not upper)
(while (and lower (= (car lower) most-positive-fixnum))
(push most-positive-fixnum key)
(setq lower (cdr lower)))
(push (if lower
(push (if (not lower) org-element--cache-default-key
(let ((n (car lower)))
(+ (ash (if (zerop (mod n 2)) n (1+ n)) -1)
org-element--cache-default-key))
org-element--cache-default-key)
org-element--cache-default-key)))
key))))
;; Ensure we don't return a list with a single element.
(if (cdr key) (nreverse key) (car key)))))