branch: elpa/datetime
commit d270828a379378df55d8378cba733ea816e68d08
Author: Paul Pogonyshev <[email protected]>
Commit: Paul Pogonyshev <[email protected]>
Fix one more bug in DST vs. normal timezone name determining in certain
cases.
---
datetime.el | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/datetime.el b/datetime.el
index 47e67f214e..6266d18cdc 100644
--- a/datetime.el
+++ b/datetime.el
@@ -962,6 +962,7 @@ to this function.
(num-years (length all-year-transitions))
transitions)
(when (>= year-offset num-years)
+ ;; Expand the transition array if it is too small. Don't expand by too
few elements at a time.
(setf (cadr timezone-data) (setq all-year-transitions (vconcat
all-year-transitions (make-vector (max (1+ (- year-offset num-years)) (/
num-years 2) 10) nil)))))
(let ((year (+ (nth 2 timezone-data) year-offset))
(year-base (+ (nth 0 timezone-data) (* year-offset
datetime--average-seconds-in-year)))
@@ -977,8 +978,14 @@ to this function.
day-of-month -1))
(offset-before (plist-get rule :before)))
(unless transitions
- ;; Preserve our DST "flag" across year boundary.
- (push (if (floatp (car (last (aref all-year-transitions (1-
year-offset)))))
+ ;; Preserve our DST "flag" across year boundary. If there
transitions for the previous year
+ ;; are not computed yet, look at the one before and so on,
until we find something. With
+ ;; transitions coming from the rules it shouldn't matter:
either every year ends in DST or
+ ;; every year ends in non-DST.
+ (push (if (floatp (let ((k year-offset)
+ historic-transitions)
+ (while (null (setf historic-transitions
(aref all-year-transitions (setf k (1- k))))))
+ (car (last historic-transitions))))
(float offset-before)
offset-before)
transitions))
