Initial support for NewGRF road stops (bus and lorry stops)

src/station.cpp

@@ -57,6 +57,7 @@ void RebuildStationKdtree()
 BaseStation::~BaseStation()
 {
 	free(this->speclist);
+	free(this->roadstop_speclist);
 
 	if (CleaningPool()) return;
 
@@ -184,6 +185,31 @@ void BaseStation::PostDestructor(size_t index)
 	InvalidateWindowData(WC_SELECT_STATION, 0, 0);
 }
 
+void BaseStation::SetRoadStopRandomBits(TileIndex tile, byte random_bits)
+{
+	for (size_t i = 0; i < this->custom_road_stop_tiles.size(); i++) {
+		if (this->custom_road_stop_tiles[i] == tile) {
+			this->custom_road_stop_random_bits[i] = random_bits;
+			return;
+		}
+	}
+	this->custom_road_stop_tiles.push_back(tile);
+	this->custom_road_stop_random_bits.push_back(random_bits);
+}
+
+void BaseStation::RemoveRoadStopRandomBits(TileIndex tile)
+{
+	for (size_t i = 0; i < this->custom_road_stop_tiles.size(); i++) {
+		if (this->custom_road_stop_tiles[i] == tile) {
+			this->custom_road_stop_tiles[i] = this->custom_road_stop_tiles.back();
+			this->custom_road_stop_random_bits[i] = this->custom_road_stop_random_bits.back();
+			this->custom_road_stop_tiles.pop_back();
+			this->custom_road_stop_random_bits.pop_back();
+			return;
+		}
+	}
+}
+
 /**
  * Get the primary road stop (the first road stop) that the given vehicle can load/unload.
  * @param v the vehicle to get the first road stop for