Codechange: Use HasTrack(dir) to improve code readability.

src/pathfinder/opf/opf_ship.cpp

@@ -206,7 +206,7 @@ Track OPFShipChooseTrack(const Ship *v, TileIndex tile, DiagDirection enterdir,
 	TrackBits rev_tracks = TrackStatusToTrackBits(GetTileTrackStatus(tile2, TRANSPORT_WATER, 0)) &
 			DiagdirReachesTracks(rev_enterdir);
 
-	if ((rev_tracks & TrackToTrackBits(cur_track) != TRACK_BIT_NONE) {
+	if (HasTrack(rev_tracks, cur_track)) {
 		rev_dist = FindShipTrack(v, tile2, rev_enterdir, TrackToTrackBits(cur_track), tile, &track);
 		if (rev_dist != UINT_MAX) rev_dist++; // penalty for reversing
 	}

src/pathfinder/yapf/yapf_common.hpp

@@ -142,7 +142,7 @@ public:
 	/** Called by YAPF to detect if node ends in the desired destination */
 	inline bool PfDetectDestination(Node &n)
 	{
-		return (n.m_key.m_tile == m_destTile) && ((m_destTrackdirs & TrackdirToTrackdirBits(n.GetTrackdir())) != TRACKDIR_BIT_NONE);
+		return (n.m_key.m_tile == m_destTile) && HasTrackdir(m_destTrackdirs, n.GetTrackdir());
 	}
 
 	/**

src/pathfinder/yapf/yapf_costrail.hpp

@@ -104,7 +104,7 @@ public:
 		assert(IsValidTrackdir(td2));
 		int cost = 0;
 		if (TrackFollower::Allow90degTurns()
-				&& ((TrackdirToTrackdirBits(td2) & TrackdirCrossesTrackdirs(td1)) != TRACKDIR_BIT_NONE)) {
+				&& HasTrackdir(TrackdirCrossesTrackdirs(td1), td2)) {
 			/* 90-deg curve penalty */
 			cost += Yapf().PfGetSettings().rail_curve90_penalty;
 		} else if (td2 != NextTrackdir(td1)) {
@@ -280,7 +280,7 @@ public:
 	{
 		assert(!n.flags_u.flags_s.m_targed_seen);
 		assert(tf->m_new_tile == n.m_key.m_tile);
-		assert((TrackdirToTrackdirBits(n.m_key.m_td) & tf->m_new_td_bits) != TRACKDIR_BIT_NONE);
+		assert((HasTrackdir(tf->m_new_td_bits, n.m_key.m_td)));
 
 		CPerfStart perf_cost(Yapf().m_perf_cost);
 

src/pathfinder/yapf/yapf_destrail.hpp

@@ -172,7 +172,7 @@ public:
 				&& (GetRailStationTrack(tile) == TrackdirToTrack(td));
 		}
 
-		return (tile == m_destTile) && ((m_destTrackdirs & TrackdirToTrackdirBits(td)) != TRACKDIR_BIT_NONE);
+		return (tile == m_destTile) && HasTrackdir(m_destTrackdirs, td);
 	}
 
 	/**

src/pathfinder/yapf/yapf_road.cpp

@@ -260,7 +260,7 @@ public:
 				(m_non_artic || IsDriveThroughStopTile(tile));
 		}
 
-		return tile == m_destTile && ((m_destTrackdirs & TrackdirToTrackdirBits(trackdir)) != TRACKDIR_BIT_NONE);
+		return tile == m_destTile && HasTrackdir(m_destTrackdirs, trackdir);
 	}
 
 	/**
@@ -420,7 +420,7 @@ public:
 		/* set origin (tile, trackdir) */
 		TileIndex src_tile = v->tile;
 		Trackdir src_td = v->GetVehicleTrackdir();
-		if ((TrackStatusToTrackdirBits(GetTileTrackStatus(src_tile, TRANSPORT_ROAD, v->compatible_roadtypes)) & TrackdirToTrackdirBits(src_td)) == 0) {
+		if (!HasTrackdir(TrackStatusToTrackdirBits(GetTileTrackStatus(src_tile, TRANSPORT_ROAD, v->compatible_roadtypes)), src_td)) {
 			/* sometimes the roadveh is not on the road (it resides on non-existing track)
 			 * how should we handle that situation? */
 			return false;
@@ -503,7 +503,7 @@ FindDepotData YapfRoadVehicleFindNearestDepot(const RoadVehicle *v, int max_dist
 {
 	TileIndex tile = v->tile;
 	Trackdir trackdir = v->GetVehicleTrackdir();
-	if ((TrackStatusToTrackdirBits(GetTileTrackStatus(tile, TRANSPORT_ROAD, v->compatible_roadtypes)) & TrackdirToTrackdirBits(trackdir)) == 0) {
+	if (!HasTrackdir(TrackStatusToTrackdirBits(GetTileTrackStatus(tile, TRANSPORT_ROAD, v->compatible_roadtypes)), trackdir)) {
 		return FindDepotData();
 	}
 

src/pathfinder/yapf/yapf_ship.cpp

@@ -65,7 +65,7 @@ public:
 
 			/* use vehicle's current direction if that's possible, otherwise use first usable one. */
 			Trackdir veh_dir = v->GetVehicleTrackdir();
-			return ((trackdirs & TrackdirToTrackdirBits(veh_dir)) != 0) ? veh_dir : (Trackdir)FindFirstBit2x64(trackdirs);
+			return (HasTrackdir(trackdirs, veh_dir)) ? veh_dir : (Trackdir)FindFirstBit2x64(trackdirs);
 		}
 
 		/* move back to the old tile/trackdir (where ship is coming from) */

src/track_func.h

@@ -331,6 +331,28 @@ static inline TrackdirBits TrackBitsToTrackdirBits(TrackBits bits)
 	return (TrackdirBits)(bits * 0x101);
 }
 
+/**
+ * Checks whether a TrackBits has a given Track.
+ * @param tracks The track bits.
+ * @param track The track to check.
+ */
+static inline bool HasTrack(TrackBits tracks, Track track)
+{
+	assert(IsValidTrack(track));
+	return HasBit(tracks, track);
+}
+
+/**
+ * Checks whether a TrackdirBits has a given Trackdir.
+ * @param trackdirs The trackdir bits.
+ * @param trackdir The trackdir to check.
+ */
+static inline bool HasTrackdir(TrackdirBits trackdirs, Trackdir trackdir)
+{
+	assert(IsValidTrackdir(trackdir));
+	return HasBit(trackdirs, trackdir);
+}
+
 /**
  * Returns the present-trackdir-information of a TrackStatus.
  *