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(svn r7369) -Cleanup: Some coding style, usage of increaseIndex and decreaseIndex to loop through the

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fifo-array-buffer, typo's.
This commit is contained in:
Darkvater 2006-12-05 11:59:28 +00:00
parent 8df7ca8f4a
commit f14a24ac26
1 changed files with 51 additions and 41 deletions
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58
news_gui.c
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@ -219,14 +219,20 @@ static void NewsWindowProc(Window *w, WindowEvent *e)
}
}
// returns the correct index in the array
// (to deal with overflows)
static byte increaseIndex(byte i)
/** Return the correct index in the pseudo-fifo
* queue and deals with overflows when increasing the index */
static inline byte increaseIndex(byte i)
{
if (i == INVALID_NEWS) return 0;
i++;
if (i >= MAX_NEWS) i = i % MAX_NEWS;
return i;
return (i + 1) % MAX_NEWS;
}
/** Return the correct index in the pseudo-fifo
* queue and deals with overflows when decreasing the index */
static inline byte decreaseIndex(byte i)
{
assert(i != INVALID_NEWS);
return (i + MAX_NEWS - 1) % MAX_NEWS;
}
/** Add a new newsitem to be shown.
@ -251,14 +257,12 @@ static byte increaseIndex(byte i)
* @see NewsCallback */
void AddNewsItem(StringID string, uint32 flags, uint data_a, uint data_b)
{
NewsItem *ni;
Window *w;
byte l_news;
if (_game_mode == GM_MENU) return;
// check the rare case that the oldest (to be overwritten) news item is open
if (_total_news==MAX_NEWS && (_oldest_news == _current_news || _oldest_news == _forced_news))
if (_total_news == MAX_NEWS && (_oldest_news == _current_news || _oldest_news == _forced_news))
MoveToNexItem();
_forced_news = INVALID_NEWS;
@ -269,11 +273,14 @@ void AddNewsItem(StringID string, uint32 flags, uint data_a, uint data_b)
_latest_news = increaseIndex(_latest_news);
/* If the fifo-buffer is full, overwrite the oldest entry */
if (l_news != INVALID_NEWS && _latest_news == _oldest_news)
_oldest_news = increaseIndex(_oldest_news); // but make sure we're not overflowing here
if (l_news != INVALID_NEWS && _latest_news == _oldest_news) {
assert(_total_news == MAX_NEWS);
_oldest_news = increaseIndex(_oldest_news);
}
// add news to _latest_news
ni = &_news_items[_latest_news];
{ /* Add news to _latest_news */
Window *w;
NewsItem *ni = &_news_items[_latest_news];
memset(ni, 0, sizeof(*ni));
ni->string_id = string;
@ -281,8 +288,7 @@ void AddNewsItem(StringID string, uint32 flags, uint data_a, uint data_b)
ni->flags = (byte)(flags >> 8);
// show this news message in color?
if (_cur_year >= _patches.colored_news_year)
ni->flags |= NF_INCOLOR;
if (_cur_year >= _patches.colored_news_year) ni->flags |= NF_INCOLOR;
ni->type = (byte)(flags >> 16);
ni->callback = (byte)(flags >> 24);
@ -295,6 +301,7 @@ void AddNewsItem(StringID string, uint32 flags, uint data_a, uint data_b)
if (w == NULL) return;
SetWindowDirty(w);
w->vscroll.count = _total_news;
}
}
@ -471,7 +478,7 @@ static void MoveToNexItem(void)
DeleteWindowById(WC_NEWS_WINDOW, 0);
_forced_news = INVALID_NEWS;
// if we're not at the last item, than move on
// if we're not at the last item, then move on
if (_current_news != _latest_news) {
NewsItem *ni;
@ -536,12 +543,16 @@ static void ShowNewsMessage(byte i)
void ShowLastNewsMessage(void)
{
if (_forced_news == INVALID_NEWS) {
switch (_forced_news) {
case INVALID_NEWS: // Not forced any news yet, show the current one
ShowNewsMessage(_current_news);
} else if (_forced_news != 0) {
ShowNewsMessage(_forced_news - 1);
} else {
break;
case 0: //
ShowNewsMessage(_total_news != MAX_NEWS ? _latest_news : MAX_NEWS - 1);
break;
default: // 'Scrolling' through news history show each one in turn
ShowNewsMessage(_forced_news - 1);
break;
}
}
@ -876,8 +887,8 @@ void DeleteVehicleNews(VehicleID vid, StringID news)
{
byte n;
for (n = _oldest_news; _latest_news != INVALID_NEWS && n != (_latest_news + 1) % MAX_NEWS; n = (n + 1) % MAX_NEWS) {
const NewsItem* ni = &_news_items[n];
for (n = _oldest_news; _latest_news != INVALID_NEWS && n != increaseIndex(_latest_news); n = increaseIndex(n)) {
const NewsItem *ni = &_news_items[n];
if (ni->flags & NF_VEHICLE &&
ni->data_a == vid &&
@ -885,8 +896,7 @@ void DeleteVehicleNews(VehicleID vid, StringID news)
Window *w;
byte i;
if (_forced_news == n) MoveToNexItem();
if (_current_news == n) MoveToNexItem();
if (_forced_news == n || _current_news == n) MoveToNexItem();
// If this is the last news item, invalidate _latest_news
if (_latest_news == _oldest_news) _latest_news = INVALID_NEWS;