(svn r12868) [0.6] -Backport from trunk r12795, r12776, r12683, r12681, r12678:
- Fix: Vehicles could break down during loading and keep loading. The intention of the break down code is not to break down when having zero speed, therefor break downs now do not happen when loading [FS#1938] (r12795)
- Fix: [OSX] In some rare cases when using an uncalibrated monitor the system colour space could not be retrieved. Show an error when this happens instead of just trying an assertion (r12776)
- Fix: In some cases a news messages would not be shown [FS#1906] (r12683)
- Fix: When a road vehicle has a tram only stop multiple times in a row in it's orders, only the first one would be skipped [FS#1918] (r12678)

/* $Id$ */

/** @file tunnelbridge.h Header file for things common for tunnels and bridges */

#ifndef TUNNELBRIDGE_H
#define TUNNELBRIDGE_H

#include "tile_type.h"
#include "map_func.h"
#include "tunnelbridge_map.h"

/**
 * Calculates the length of a tunnel or a bridge (without end tiles)
 * @return length of bridge/tunnel middle
 */
static inline uint GetTunnelBridgeLength(TileIndex begin, TileIndex end)
{
	int x1 = TileX(begin);
	int y1 = TileY(begin);
	int x2 = TileX(end);
	int y2 = TileY(end);

	return abs(x2 + y2 - x1 - y1) - 1;
}

#endif /* TUNNELBRIDGE_H */