From 0762aa9ec950a7c7966b1706daa7a032f5de790a Mon Sep 17 00:00:00 2001
From: tron <tron@openttd.org>
Date: Thu, 21 Jul 2005 22:15:02 +0000
Subject: (svn r2669) Shuffle some more stuff around to reduce dependencies

---
 airport.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'airport.c')

diff --git a/airport.c b/airport.c
index 36be248f4..a8d72e52a 100644
--- a/airport.c
+++ b/airport.c
@@ -3,6 +3,8 @@
 #include "debug.h"
 #include "map.h"
 #include "airport.h"
+#include "macros.h"
+#include "variables.h"
 
 AirportFTAClass *CountryAirport;
 AirportFTAClass *CityAirport;
@@ -359,3 +361,14 @@ const AirportFTAClass* GetAirport(const byte airport_type)
 	}
 	return Airport;
 }
+
+uint32 GetValidAirports(void)
+{
+	uint32 bytemask = _avail_aircraft; /// sets the first 3 bytes, 0 - 2, @see AdjustAvailAircraft()
+
+	// 1980-1-1 is --> 21915
+	// 1990-1-1 is --> 25568
+	if (_date >= 21915) {SETBIT(bytemask, 3);}	// metropilitan airport 1980
+	if (_date >= 25568) {SETBIT(bytemask, 4);}	// international airport 1990
+	return bytemask;
+}
-- 
cgit v1.2.3-54-g00ecf