mirror of https://github.com/OpenTTD/OpenTTD
(svn r7388) -Fix (r7384 / r7368 / r3757): When adding a new news item for the first time (_latest_news
is INVALID_NEWS), make it the value of _oldest_news, not zero as DeleteVehicleNews can change _oldest_news. Also remove the (i == INVALID_NEWS) return 0; guard from increaseIndex as it's only used in 2 places, nowhere else.release/0.5
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07ad588487
commit
b461b8dbe5
10
news_gui.c
10
news_gui.c
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@ -230,7 +230,7 @@ static void NewsWindowProc(Window *w, WindowEvent *e)
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* queue and deals with overflows when increasing the index */
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static inline NewsID increaseIndex(NewsID i)
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{
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if (i == INVALID_NEWS) return 0;
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assert(i != INVALID_NEWS);
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return (i + 1) % MAX_NEWS;
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}
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@ -275,9 +275,11 @@ void AddNewsItem(StringID string, uint32 flags, uint data_a, uint data_b)
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_forced_news = INVALID_NEWS;
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if (_total_news < MAX_NEWS) _total_news++;
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// make sure our pointer isn't overflowing
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/* Increase _latest_news. If we have no news yet, use _oldest news as an
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* index. We cannot use 0 as _oldest_news can jump around due to
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* DeleteVehicleNews */
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l_news = _latest_news;
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_latest_news = increaseIndex(_latest_news);
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_latest_news = (_latest_news == INVALID_NEWS) ? _oldest_news : increaseIndex(_latest_news);
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/* If the fifo-buffer is full, overwrite the oldest entry */
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if (l_news != INVALID_NEWS && _latest_news == _oldest_news) {
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@ -489,7 +491,7 @@ static void MoveToNextItem(void)
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if (_current_news != _latest_news) {
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NewsItem *ni;
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_current_news = increaseIndex(_current_news);
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_current_news = (_current_news == INVALID_NEWS) ? _oldest_news : increaseIndex(_current_news);
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ni = &_news_items[_current_news];
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// check the date, don't show too old items
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