From fe1691acce220f6d55a7bcad077020cfbec4bfb5 Mon Sep 17 00:00:00 2001
From: tron <tron@openttd.org>
Date: Wed, 31 Jan 2007 06:25:46 +0000
Subject: (svn r8477) -Fix

-Codechange: Remove the unnecessary attributes Station::{bus,lorry}_tile_obsolete by replacing them with a scan of the map for existing road stops when loading old savegames
---
 src/oldloader.cpp   |  7 +------
 src/openttd.cpp     | 16 ++++++++++++++++
 src/station.h       |  4 ----
 src/station_cmd.cpp | 20 +-------------------
 4 files changed, 18 insertions(+), 29 deletions(-)

diff --git a/src/oldloader.cpp b/src/oldloader.cpp
index 0c9bf6d3b..2c9d045f2 100644
--- a/src/oldloader.cpp
+++ b/src/oldloader.cpp
@@ -312,10 +312,6 @@ static void FixOldStations(void)
 		if (st->train_tile != 0 && GetRailStationAxis(st->train_tile) != AXIS_X) {
 			Swap(st->trainst_w, st->trainst_h);
 		}
-
-		/* Check if there is a bus or truck station, and convert to new format */
-		if (st->bus_tile_obsolete != 0)   st->bus_stops   = new RoadStop(st->bus_tile_obsolete);
-		if (st->lorry_tile_obsolete != 0) st->truck_stops = new RoadStop(st->lorry_tile_obsolete);
 	}
 }
 
@@ -578,8 +574,7 @@ static const OldChunks station_chunk[] = {
 	OCL_SVAR(   OC_TILE, Station, xy ),
 	OCL_VAR ( OC_UINT32,   1, &_old_town_index ),
 
-	OCL_SVAR(   OC_TILE, Station, bus_tile_obsolete ),
-	OCL_SVAR(   OC_TILE, Station, lorry_tile_obsolete ),
+	OCL_NULL( 4 ), // bus/lorry tile
 	OCL_SVAR(   OC_TILE, Station, train_tile ),
 	OCL_SVAR(   OC_TILE, Station, airport_tile ),
 	OCL_SVAR(   OC_TILE, Station, dock_tile ),
diff --git a/src/openttd.cpp b/src/openttd.cpp
index 1f0b6af62..cba18f730 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -1282,6 +1282,22 @@ bool AfterLoadGame(void)
 	// In 5.1, Oilrigs have been moved (again)
 	if (CheckSavegameVersionOldStyle(5, 1)) UpdateOilRig();
 
+	/* From this version on there can be multiple road stops of the same type per
+	 * station. Convert the existing stops to the new internal data structure.
+	 */
+	if (CheckSavegameVersion(6)) {
+		for (TileIndex t = 0; t < map_size; t++) {
+			if (IsRoadStopTile(t)) {
+				RoadStop *rs = new RoadStop(t);
+				if (rs == NULL) error("Too many road stops in savegame");
+
+				Station *st = GetStationByTile(t);
+				RoadStop **head = IsTruckStop(t) ? &st->truck_stops : &st->bus_stops;
+				*head = rs;
+			}
+		}
+	}
+
 	/* In version 6.1 we put the town index in the map-array. To do this, we need
 	 *  to use m2 (16bit big), so we need to clean m2, and that is where this is
 	 *  all about ;) */
diff --git a/src/station.h b/src/station.h
index b4d9d9a88..226eddc0c 100644
--- a/src/station.h
+++ b/src/station.h
@@ -142,10 +142,6 @@ struct Station {
 	uint16 random_bits;
 	byte waiting_triggers;
 
-	/* Stuff that is no longer used, but needed for conversion */
-	TileIndex bus_tile_obsolete;
-	TileIndex lorry_tile_obsolete;
-
 	StationRect rect; ///< Station spread out rectangle (not saved) maintained by StationRect_xxx() functions
 
 	static const int cDebugCtorLevel = 3;
diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
index f59dabcc7..0c2580612 100644
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -2841,8 +2841,7 @@ static const SaveLoad _roadstop_desc[] = {
 static const SaveLoad _station_desc[] = {
 	SLE_CONDVAR(Station, xy,                         SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
 	SLE_CONDVAR(Station, xy,                         SLE_UINT32,                  6, SL_MAX_VERSION),
-	SLE_CONDVAR(Station, bus_tile_obsolete,          SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
-	SLE_CONDVAR(Station, lorry_tile_obsolete,        SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
+	SLE_CONDNULL(4, 0, 5), // bus/lorry tile
 	SLE_CONDVAR(Station, train_tile,                 SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
 	SLE_CONDVAR(Station, train_tile,                 SLE_UINT32,                  6, SL_MAX_VERSION),
 	SLE_CONDVAR(Station, airport_tile,               SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
@@ -2972,23 +2971,6 @@ static void Load_STNS(void)
 			st->trainst_w = w;
 			st->trainst_h = h;
 		}
-
-		/* In older versions, we had just 1 tile for a bus/lorry, now we have more..
-		 *  convert, if needed */
-		if (CheckSavegameVersion(6)) {
-			if (st->bus_tile_obsolete != 0) {
-				st->bus_stops = new RoadStop(st->bus_tile_obsolete);
-				if (st->bus_stops == NULL)
-					error("Station: too many busstations in savegame");
-
-			}
-			if (st->lorry_tile_obsolete != 0) {
-				st->truck_stops = new RoadStop(st->lorry_tile_obsolete);
-				if (st->truck_stops == NULL)
-					error("Station: too many truckstations in savegame");
-
-			}
-		}
 	}
 
 	/* This is to ensure all pointers are within the limits of _stations_size */
-- 
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