Codechange: Use null pointer literal instead of the NULL macro

1 files changed, 14 insertions, 14 deletions

diff --git a/src/train_gui.cpp b/src/train_gui.cpp
index 31b7a2ec0..c927d42ce 100644
--- a/src/train_gui.cpp
+++ b/src/train_gui.cpp
@@ -33,17 +33,17 @@ void CcBuildWagon(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p
 	if (result.Failed()) return;
 
 	/* find a locomotive in the depot. */
-	const Vehicle *found = NULL;
+	const Vehicle *found = nullptr;
 	const Train *t;
 	FOR_ALL_TRAINS(t) {
 		if (t->IsFrontEngine() && t->tile == tile && t->IsStoppedInDepot()) {
-			if (found != NULL) return; // must be exactly one.
+			if (found != nullptr) return; // must be exactly one.
 			found = t;
 		}
 	}
 
 	/* if we found a loco, */
-	if (found != NULL) {
+	if (found != nullptr) {
 		found = found->Last();
 		/* put the new wagon at the end of the loco. */
 		DoCommandP(0, _new_vehicle_id, found->index, CMD_MOVE_RAIL_VEHICLE);
@@ -65,8 +65,8 @@ static int HighlightDragPosition(int px, int max_width, VehicleID selection, boo
 
 	assert(selection != INVALID_VEHICLE);
 	int dragged_width = 0;
-	for (Train *t = Train::Get(selection); t != NULL; t = chain ? t->Next() : (t->HasArticulatedPart() ? t->GetNextArticulatedPart() : NULL)) {
-		dragged_width += t->GetDisplayImageWidth(NULL);
+	for (Train *t = Train::Get(selection); t != nullptr; t = chain ? t->Next() : (t->HasArticulatedPart() ? t->GetNextArticulatedPart() : nullptr)) {
+		dragged_width += t->GetDisplayImageWidth(nullptr);
 	}
 
 	int drag_hlight_left = rtl ? max(px - dragged_width + 1, 0) : px;
@@ -112,7 +112,7 @@ void DrawTrainImage(const Train *v, int left, int right, int y, VehicleID select
 	bool sel_articulated = false;
 	bool dragging = (drag_dest != INVALID_VEHICLE);
 	bool drag_at_end_of_train = (drag_dest == v->index); // Head index is used to mark dragging at end of train.
-	for (; v != NULL && (rtl ? px > 0 : px < max_width); v = v->Next()) {
+	for (; v != nullptr && (rtl ? px > 0 : px < max_width); v = v->Next()) {
 		if (dragging && !drag_at_end_of_train && drag_dest == v->index) {
 			/* Highlight the drag-and-drop destination inside the train. */
 			int drag_hlight_width = HighlightDragPosition(px, max_width, selection, _cursor.vehchain);
@@ -292,7 +292,7 @@ static void GetCargoSummaryOfArticulatedVehicle(const Train *v, CargoSummary *su
 		item->capacity += v->cargo_cap;
 		item->amount += v->cargo.StoredCount();
 		if (item->source == INVALID_STATION) item->source = v->cargo.Source();
-	} while ((v = v->Next()) != NULL && v->IsArticulatedPart());
+	} while ((v = v->Next()) != nullptr && v->IsArticulatedPart());
 }
 
 /**
@@ -306,7 +306,7 @@ static uint GetLengthOfArticulatedVehicle(const Train *v)
 
 	do {
 		length += v->GetDisplayImageWidth();
-	} while ((v = v->Next()) != NULL && v->IsArticulatedPart());
+	} while ((v = v->Next()) != nullptr && v->IsArticulatedPart());
 
 	return length;
 }
@@ -324,7 +324,7 @@ int GetTrainDetailsWndVScroll(VehicleID veh_id, TrainDetailsWindowTabs det_tab)
 	if (det_tab == TDW_TAB_TOTALS) { // Total cargo tab
 		CargoArray act_cargo;
 		CargoArray max_cargo;
-		for (const Vehicle *v = Vehicle::Get(veh_id); v != NULL; v = v->Next()) {
+		for (const Vehicle *v = Vehicle::Get(veh_id); v != nullptr; v = v->Next()) {
 			act_cargo[v->cargo_type] += v->cargo.StoredCount();
 			max_cargo[v->cargo_type] += v->cargo_cap;
 		}
@@ -337,7 +337,7 @@ int GetTrainDetailsWndVScroll(VehicleID veh_id, TrainDetailsWindowTabs det_tab)
 		}
 		num++; // needs one more because first line is description string
 	} else {
-		for (const Train *v = Train::Get(veh_id); v != NULL; v = v->GetNextVehicle()) {
+		for (const Train *v = Train::Get(veh_id); v != nullptr; v = v->GetNextVehicle()) {
 			GetCargoSummaryOfArticulatedVehicle(v, &_cargo_summary);
 			num += max(1u, (unsigned)_cargo_summary.size());
 
@@ -375,7 +375,7 @@ void DrawTrainDetails(const Train *v, int left, int right, int y, int vscroll_po
 		bool rtl = _current_text_dir == TD_RTL;
 		Direction dir = rtl ? DIR_E : DIR_W;
 		int x = rtl ? right : left;
-		for (; v != NULL && vscroll_pos > -vscroll_cap; v = v->GetNextVehicle()) {
+		for (; v != nullptr && vscroll_pos > -vscroll_cap; v = v->GetNextVehicle()) {
 			GetCargoSummaryOfArticulatedVehicle(v, &_cargo_summary);
 
 			/* Draw sprites */
@@ -388,7 +388,7 @@ void DrawTrainDetails(const Train *v, int left, int right, int y, int vscroll_po
 				if (vscroll_pos <= 0 && vscroll_pos > -vscroll_cap) {
 					int pitch = 0;
 					const Engine *e = Engine::Get(v->engine_type);
-					if (e->GetGRF() != NULL) {
+					if (e->GetGRF() != nullptr) {
 						pitch = ScaleGUITrad(e->GetGRF()->traininfo_vehicle_pitch);
 					}
 					PaletteID pal = (v->vehstatus & VS_CRASHED) ? PALETTE_CRASH : GetVehiclePalette(v);
@@ -399,7 +399,7 @@ void DrawTrainDetails(const Train *v, int left, int right, int y, int vscroll_po
 				px += rtl ? -width : width;
 				dx += width;
 				u = u->Next();
-			} while (u != NULL && u->IsArticulatedPart());
+			} while (u != nullptr && u->IsArticulatedPart());
 
 			bool separate_sprite_row = (dx > (uint)ScaleGUITrad(TRAIN_DETAILS_MAX_INDENT));
 			if (separate_sprite_row) {
@@ -450,7 +450,7 @@ void DrawTrainDetails(const Train *v, int left, int right, int y, int vscroll_po
 		CargoArray max_cargo;
 		Money feeder_share = 0;
 
-		for (const Vehicle *u = v; u != NULL; u = u->Next()) {
+		for (const Vehicle *u = v; u != nullptr; u = u->Next()) {
 			act_cargo[u->cargo_type] += u->cargo.StoredCount();
 			max_cargo[u->cargo_type] += u->cargo_cap;
 			feeder_share             += u->cargo.FeederShare();