cpp/openttd-patchpack/source Files · src/road_map.cpp

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Patric Stout

Remove: ENABLE_NETWORK switch

This switch has been a pain for years. Often disabling broke
compilation, as no developer compiles OpenTTD without, neither do
any of our official binaries.

Additionaly, it has grown so hugely in our codebase, that it
clearly shows that the current solution was a poor one. 350+
instances of "#ifdef ENABLE_NETWORK" were in the code, of which
only ~30 in the networking code itself. The rest were all around
the code to do the right thing, from GUI to NewGRF.

A more proper solution would be to stub all the functions, and
make sure the rest of the code can simply assume network is
available. This was also partially done, and most variables were
correct if networking was disabled. Despite that, often the #ifdefs
were still used.

With the recent removal of DOS, there is also no platform anymore
which we support where networking isn't working out-of-the-box.

All in all, it is time to remove the ENABLE_NETWORK switch. No
replacement is planned, but if you feel we really need this option,
we welcome any Pull Request which implements this in a way that
doesn't crawl through the code like this diff shows we used to.

/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD 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, version 2.
 * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file road_map.cpp Complex road accessors. */

#include "stdafx.h"
#include "station_map.h"
#include "tunnelbridge_map.h"

#include "safeguards.h"


/**
 * Returns the RoadBits on an arbitrary tile
 * Special behaviour:
 * - road depots: entrance is treated as road piece
 * - road tunnels: entrance is treated as road piece
 * - bridge ramps: start of the ramp is treated as road piece
 * - bridge middle parts: bridge itself is ignored
 *
 * If straight_tunnel_bridge_entrance is set a ROAD_X or ROAD_Y
 * for bridge ramps and tunnel entrances is returned depending
 * on the orientation of the tunnel or bridge.
 * @param tile the tile to get the road bits for
 * @param rt   the road type to get the road bits form
 * @param straight_tunnel_bridge_entrance whether to return straight road bits for tunnels/bridges.
 * @return the road bits of the given tile
 */
RoadBits GetAnyRoadBits(TileIndex tile, RoadType rt, bool straight_tunnel_bridge_entrance)
{
	if (!HasTileRoadType(tile, rt)) return ROAD_NONE;

	switch (GetTileType(tile)) {
		case MP_ROAD:
			switch (GetRoadTileType(tile)) {
				default:
				case ROAD_TILE_NORMAL:   return GetRoadBits(tile, rt);
				case ROAD_TILE_CROSSING: return GetCrossingRoadBits(tile);
				case ROAD_TILE_DEPOT:    return DiagDirToRoadBits(GetRoadDepotDirection(tile));
			}

		case MP_STATION:
			if (!IsRoadStopTile(tile)) return ROAD_NONE;
			if (IsDriveThroughStopTile(tile)) return (GetRoadStopDir(tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y;
			return DiagDirToRoadBits(GetRoadStopDir(tile));

		case MP_TUNNELBRIDGE:
			if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return ROAD_NONE;
			return straight_tunnel_bridge_entrance ?
					AxisToRoadBits(DiagDirToAxis(GetTunnelBridgeDirection(tile))) :
					DiagDirToRoadBits(ReverseDiagDir(GetTunnelBridgeDirection(tile)));

		default: return ROAD_NONE;
	}
}