From 75a9419f04bf2256428907ecadd0c7b11887f3ad Mon Sep 17 00:00:00 2001
From: tron <tron@openttd.org>
Date: Sun, 19 Mar 2006 19:33:19 +0000
Subject: (svn r3986) Add [GS]etCrossingRoadOwner

---
 openttd.c  |  4 +++-
 rail_cmd.c |  2 +-
 road_cmd.c | 14 +++++---------
 road_map.h | 12 ++++++++++++
 town_cmd.c |  3 +--
 5 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/openttd.c b/openttd.c
index d1bb13c76..bc928779f 100644
--- a/openttd.c
+++ b/openttd.c
@@ -1002,7 +1002,9 @@ static void ConvertTownOwner(void)
 
 	for (tile = 0; tile != MapSize(); tile++) {
 		if (IsTileType(tile, MP_STREET)) {
-			if (IsLevelCrossing(tile) && _m[tile].m3 & 0x80) _m[tile].m3 = OWNER_TOWN;
+			if (IsLevelCrossing(tile) && GetCrossingRoadOwner(tile) & 0x80) {
+				SetCrossingRoadOwner(tile, OWNER_TOWN);
+			}
 
 			if (_m[tile].m1 & 0x80) SetTileOwner(tile, OWNER_TOWN);
 		} else if (IsTileType(tile, MP_TUNNELBRIDGE)) {
diff --git a/rail_cmd.c b/rail_cmd.c
index eaec7bee9..d1a5c3380 100644
--- a/rail_cmd.c
+++ b/rail_cmd.c
@@ -417,7 +417,7 @@ int32 CmdRemoveSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2)
 			}
 
 			if (flags & DC_EXEC) {
-				MakeRoadNormal(tile, _m[tile].m3, GetCrossingRoadBits(tile), _m[tile].m2);
+				MakeRoadNormal(tile, GetCrossingRoadOwner(tile), GetCrossingRoadBits(tile), _m[tile].m2);
 			}
 			break;
 		}
diff --git a/road_cmd.c b/road_cmd.c
index 3108c4536..363ecfaa6 100644
--- a/road_cmd.c
+++ b/road_cmd.c
@@ -34,9 +34,8 @@ static bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, bool* edge_roa
 	// Only do the special processing for actual players.
 	if (_current_player >= MAX_PLAYERS) return true;
 
-	// A railway crossing has the road owner in the map3_lo byte.
 	if (IsTileType(tile, MP_STREET) && IsLevelCrossing(tile)) {
-		owner = _m[tile].m3;
+		owner = GetCrossingRoadOwner(tile);
 	} else {
 		owner = GetTileOwner(tile);
 	}
@@ -106,9 +105,7 @@ int32 CmdRemoveRoad(int x, int y, uint32 flags, uint32 p1, uint32 p2)
 
 	if (!IsTileType(tile, MP_STREET) && !IsTileType(tile, MP_TUNNELBRIDGE)) return CMD_ERROR;
 
-	// owner for railroad crossing is stored somewhere else
-	// XXX - Fix this so for a given tiletype the owner of the type is in the same variable
-	owner = IsLevelCrossing(tile) ? _m[tile].m3 : GetTileOwner(tile);
+	owner = IsLevelCrossing(tile) ? GetCrossingRoadOwner(tile) : GetTileOwner(tile);
 
 	if (owner == OWNER_TOWN && _game_mode != GM_EDITOR) {
 		if (IsTileType(tile, MP_TUNNELBRIDGE)) { // index of town is not saved for bridge (no space)
@@ -1127,9 +1124,8 @@ static void VehicleLeave_Road(Vehicle *v, TileIndex tile, int x, int y)
 
 static void ChangeTileOwner_Road(TileIndex tile, PlayerID old_player, PlayerID new_player)
 {
-	// road/rail crossing where the road is owned by the current player?
-	if (old_player == _m[tile].m3 && IsLevelCrossing(tile)) {
-		_m[tile].m3 = (new_player == OWNER_SPECTATOR) ? OWNER_NONE : new_player;
+	if (IsLevelCrossing(tile) && GetCrossingRoadOwner(tile) == old_player) {
+		SetCrossingRoadOwner(tile, new_player == OWNER_SPECTATOR ? OWNER_NONE : new_player);
 	}
 
 	if (!IsTileOwner(tile, old_player)) return;
@@ -1143,7 +1139,7 @@ static void ChangeTileOwner_Road(TileIndex tile, PlayerID old_player, PlayerID n
 				break;
 
 			case ROAD_CROSSING:
-				MakeRoadNormal(tile, _m[tile].m3, GetCrossingRoadBits(tile), _m[tile].m2);
+				MakeRoadNormal(tile, GetCrossingRoadOwner(tile), GetCrossingRoadBits(tile), _m[tile].m2);
 				break;
 
 			default:
diff --git a/road_map.h b/road_map.h
index 3e506bf72..feb7656cb 100644
--- a/road_map.h
+++ b/road_map.h
@@ -55,6 +55,18 @@ static inline TrackBits GetCrossingRailBits(TileIndex tile)
 }
 
 
+// TODO swap owner of road and rail
+static inline Owner GetCrossingRoadOwner(TileIndex t)
+{
+	return (Owner)_m[t].m3;
+}
+
+static inline void SetCrossingRoadOwner(TileIndex t, Owner o)
+{
+	_m[t].m3 = o;
+}
+
+
 typedef enum RoadType {
 	ROAD_NORMAL,
 	ROAD_CROSSING,
diff --git a/town_cmd.c b/town_cmd.c
index 73102547b..86bf54124 100644
--- a/town_cmd.c
+++ b/town_cmd.c
@@ -1828,10 +1828,9 @@ Town *ClosestTownFromTile(TileIndex tile, uint threshold)
 	uint dist, best = threshold;
 	Town *best_town = NULL;
 
-	// XXX - Fix this so for a given tiletype the owner of the type is in the same variable
 	if (IsTileType(tile, MP_HOUSE) || (
 				IsTileType(tile, MP_STREET) &&
-				(IsLevelCrossing(tile) ? _m[tile].m3 : GetTileOwner(tile)) == OWNER_TOWN
+				(IsLevelCrossing(tile) ? GetCrossingRoadOwner(tile) : GetTileOwner(tile)) == OWNER_TOWN
 			))
 		return GetTown(_m[tile].m2);
 
-- 
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