1 files changed, 111 insertions, 0 deletions
diff --git a/src/uqm/clock.h b/src/uqm/clock.h
new file mode 100644
index 0000000..5bd428c
--- /dev/null
+++ b/src/uqm/clock.h
@@ -0,0 +1,111 @@
+//Copyright Paul Reiche, Fred Ford. 1992-2002
+
+/*
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef UQM_CLOCK_H_
+#define UQM_CLOCK_H_
+
+#include "libs/tasklib.h"
+#include "displist.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+#define START_YEAR 2155
+
+#define UPDATE_DAY (1 << 0)
+#define UPDATE_MONTH (1 << 1)
+#define UPDATE_YEAR (1 << 2)
+
+typedef struct
+{
+	BYTE day_index, month_index;
+	COUNT year_index;
+	SIZE tick_count, day_in_ticks;
+
+	QUEUE event_q;
+			/* Queue element is EVENT */
+} CLOCK_STATE;
+
+typedef HLINK HEVENT;
+
+typedef struct event
+{
+	// LINK elements; must be first
+	HEVENT pred, succ;
+
+	BYTE day_index, month_index;
+	COUNT year_index;
+	BYTE func_index;
+} EVENT;
+
+typedef enum
+{
+	ABSOLUTE_EVENT = 0,
+	RELATIVE_EVENT
+} EVENT_TYPE;
+
+#define AllocEvent() AllocLink (&GLOBAL (GameClock.event_q))
+#define PutEvent(h) PutQueue (&GLOBAL (GameClock.event_q), (h))
+#define InsertEvent(h,i) InsertQueue (&GLOBAL (GameClock.event_q), (h), (i))
+#define GetHeadEvent() GetHeadLink (&GLOBAL (GameClock.event_q))
+#define GetTailEvent() GetTailLink (&GLOBAL (GameClock.event_q))
+#define LockEvent(h,ppe) (*(ppe) = (EVENT*)LockLink (&GLOBAL (GameClock.event_q), h))
+#define UnlockEvent(h) UnlockLink (&GLOBAL (GameClock.event_q), (h))
+#define RemoveEvent(h) RemoveQueue (&GLOBAL (GameClock.event_q), (h))
+#define FreeEvent(h) FreeLink (&GLOBAL (GameClock.event_q), (h))
+#define GetPredEvent(l) _GetPredLink (l)
+#define GetSuccEvent(l) _GetSuccLink (l)
+#define ForAllEvents(callback, arg) ForAllLinks(&GLOBAL (GameClock.event_q), \
+		(void (*)(LINK *, void *)) (callback), (arg))
+
+// Rates are in seconds per game day
+#define HYPERSPACE_CLOCK_RATE 5
+// XXX: the IP rate is based on 24 ticks/second (see SetGameClockRate),
+//   however, IP runs at 30 fps right now. So in reality, the IP clock
+//   rate is closer to 23 seconds per game day. The clock is faster, but
+//   the flagship also moves faster.
+#define INTERPLANETARY_CLOCK_RATE 30
+
+extern BOOLEAN InitGameClock (void);
+extern BOOLEAN UninitGameClock (void);
+
+extern void SetGameClockRate (COUNT seconds_per_day);
+extern BOOLEAN ValidateEvent (EVENT_TYPE type, COUNT *pmonth_index,
+		COUNT *pday_index, COUNT *pyear_index);
+extern HEVENT AddEvent (EVENT_TYPE type, COUNT month_index, COUNT
+		day_index, COUNT year_index, BYTE func_index);
+extern void EventHandler (BYTE selector);
+extern void GameClockTick (void);
+extern void MoveGameClockDays (COUNT days);
+
+// The lock/unlock/running functions are for debugging use only
+// Locking will block the GameClockTick() function and thus
+// the thread moving the clock.
+extern void LockGameClock (void);
+extern void UnlockGameClock (void);
+// A weak indicator of the clock moving. Suitable for debugging,
+// but not much else
+extern BOOLEAN GameClockRunning (void);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* UQM_CLOCK_H_ */