diff --git a/src/ai/default/default.cpp b/src/ai/default/default.cpp
--- a/src/ai/default/default.cpp
+++ b/src/ai/default/default.cpp
@@ -698,11 +698,11 @@ static void AiWantLongIndustryRoute(Play
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyIndustryRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 60, 90 + 1)) break;
+		if (IsInsideMM(fr.distance, 60, 90 + 1)) break;
 
 		// try a random one
 		AiFindRandomIndustryRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 60, 90 + 1)) break;
+		if (IsInsideMM(fr.distance, 60, 90 + 1)) break;
 
 		// only test 60 times
 		if (--i == 0) return;
@@ -801,11 +801,11 @@ static void AiWantMediumIndustryRoute(Pl
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyIndustryRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 40, 60 + 1)) break;
+		if (IsInsideMM(fr.distance, 40, 60 + 1)) break;
 
 		// try a random one
 		AiFindRandomIndustryRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 40, 60 + 1)) break;
+		if (IsInsideMM(fr.distance, 40, 60 + 1)) break;
 
 		// only test 60 times
 		if (--i == 0) return;
@@ -869,11 +869,11 @@ static void AiWantShortIndustryRoute(Pla
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyIndustryRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
+		if (IsInsideMM(fr.distance, 15, 40 + 1)) break;
 
 		// try a random one
 		AiFindRandomIndustryRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
+		if (IsInsideMM(fr.distance, 15, 40 + 1)) break;
 
 		// only test 60 times
 		if (--i == 0) return;
@@ -937,11 +937,11 @@ static void AiWantMailRoute(Player *p)
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyPassengerRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 60, 110 + 1)) break;
+		if (IsInsideMM(fr.distance, 60, 110 + 1)) break;
 
 		// try a random one
 		AiFindRandomPassengerRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 60, 110 + 1)) break;
+		if (IsInsideMM(fr.distance, 60, 110 + 1)) break;
 
 		// only test 60 times
 		if (--i == 0) return;
@@ -1038,11 +1038,11 @@ static void AiWantPassengerRoute(Player 
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyPassengerRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 0, 55 + 1)) break;
+		if (IsInsideMM(fr.distance, 0, 55 + 1)) break;
 
 		// try a random one
 		AiFindRandomPassengerRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 0, 55 + 1)) break;
+		if (IsInsideMM(fr.distance, 0, 55 + 1)) break;
 
 		// only test 60 times
 		if (--i == 0) return;
@@ -1126,11 +1126,11 @@ static void AiWantLongRoadIndustryRoute(
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyIndustryRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 35, 55 + 1)) break;
+		if (IsInsideMM(fr.distance, 35, 55 + 1)) break;
 
 		// try a random one
 		AiFindRandomIndustryRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 35, 55 + 1)) break;
+		if (IsInsideMM(fr.distance, 35, 55 + 1)) break;
 
 		// only test 60 times
 		if (--i == 0) return;
@@ -1182,11 +1182,11 @@ static void AiWantMediumRoadIndustryRout
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyIndustryRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
+		if (IsInsideMM(fr.distance, 15, 40 + 1)) break;
 
 		// try a random one
 		AiFindRandomIndustryRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
+		if (IsInsideMM(fr.distance, 15, 40 + 1)) break;
 
 		// only test 60 times
 		if (--i == 0) return;
@@ -1238,11 +1238,11 @@ static void AiWantLongRoadPassengerRoute
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyPassengerRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 55, 180 + 1)) break;
+		if (IsInsideMM(fr.distance, 55, 180 + 1)) break;
 
 		// try a random one
 		AiFindRandomPassengerRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, 55, 180 + 1)) break;
+		if (IsInsideMM(fr.distance, 55, 180 + 1)) break;
 
 		// only test 60 times
 		if (--i == 0) return;
@@ -1407,11 +1407,11 @@ static void AiWantPassengerAircraftRoute
 
 		// look for one from the subsidy list
 		AiFindSubsidyPassengerRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, min_squares, max_squares + 1)) break;
+		if (IsInsideMM(fr.distance, min_squares, max_squares + 1)) break;
 
 		// try a random one
 		AiFindRandomPassengerRoute(&fr);
-		if (IS_INT_INSIDE(fr.distance, min_squares, max_squares + 1)) break;
+		if (IsInsideMM(fr.distance, min_squares, max_squares + 1)) break;
 
 		// only test 60 times
 		if (--i == 0) return;
diff --git a/src/console.cpp b/src/console.cpp
--- a/src/console.cpp
+++ b/src/console.cpp
@@ -356,7 +356,7 @@ static void IConsoleHistoryNavigate(int 
 	_iconsole_historypos = i;
 	IConsoleClearCommand();
 	/* copy history to 'command prompt / bash' */
-	assert(_iconsole_history[i] != NULL && IS_INT_INSIDE(i, 0, ICON_HISTORY_SIZE));
+	assert(_iconsole_history[i] != NULL && IsInsideMM(i, 0, ICON_HISTORY_SIZE));
 	ttd_strlcpy(_iconsole_cmdline.buf, _iconsole_history[i], _iconsole_cmdline.maxlength);
 	UpdateTextBufferSize(&_iconsole_cmdline);
 }
diff --git a/src/console_cmds.cpp b/src/console_cmds.cpp
--- a/src/console_cmds.cpp
+++ b/src/console_cmds.cpp
@@ -233,7 +233,7 @@ static const FiosItem* GetFiosItem(const
 		if (file == endptr || *endptr != '\0') i = -1;
 	}
 
-	return IS_INT_INSIDE(i, 0, _fios_num) ? &_fios_list[i] : NULL;
+	return IsInsideMM(i, 0, _fios_num) ? &_fios_list[i] : NULL;
 }
 
 
diff --git a/src/core/math_func.hpp b/src/core/math_func.hpp
--- a/src/core/math_func.hpp
+++ b/src/core/math_func.hpp
@@ -82,7 +82,7 @@ static inline uint minu(const uint a, co
  * @param a The value we want to unsign
  * @return The unsigned value
  */
-template <typename T> static inline T abs(T a)
+template <typename T> static inline T abs(const T a)
 {
 	return (a < (T)0) ? -a : a;
 }
@@ -191,37 +191,22 @@ template <typename T> static inline T de
  * @param size The size of the interval
  * @return True if the value is in the interval, false else.
  */
-template<typename T> static inline bool IS_INSIDE_1D(const T x, const int base, const uint size)
+template<typename T> static inline bool IsInsideBS(const T x, const uint base, const uint size)
 {
 	return (uint)(x - base) < size;
 }
 
 /**
- * Checks if a byte is in an interval.
+ * Checks if a value is in an interval.
  *
- * Returns true if a byte value is in the interval of [min, max).
+ * Returns true if a value is in the interval of [min, max).
  *
- * @param a The byte value to check
+ * @param a The value to check
  * @param min The minimum of the interval
  * @param max The maximum of the interval
- * @see IS_INSIDE_1D
+ * @see IsInsideBS()
  */
-template<typename T> static inline bool IS_BYTE_INSIDE(const T x, const byte min, const byte max)
-{
-	return (byte)(x - min) < (max - min);
-}
-
-/**
- * Checks if an int is in an interval.
- *
- * Returns true if a integer value is in the interval of [min, max).
- *
- * @param a The integer value to check
- * @param min The minimum of the interval
- * @param max The maximum of the interval
- * @see IS_INSIDE_1D
- */
-template<typename T> static inline bool IS_INT_INSIDE(const T x, const int min, const uint max)
+template<typename T> static inline bool IsInsideMM(const T x, const uint min, const uint max)
 {
 	return (uint)(x - min) < (max - min);
 }
diff --git a/src/economy.cpp b/src/economy.cpp
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -365,7 +365,7 @@ void ChangeOwnershipOfPlayerItems(Player
 		}
 
 		FOR_ALL_VEHICLES(v) {
-			if (v->owner == old_player && IS_BYTE_INSIDE(v->type, VEH_TRAIN, VEH_AIRCRAFT + 1)) {
+			if (v->owner == old_player && IsInsideMM(v->type, VEH_TRAIN, VEH_AIRCRAFT + 1)) {
 				if (new_player == PLAYER_SPECTATOR) {
 					DeleteWindowById(WC_VEHICLE_VIEW, v->index);
 					DeleteWindowById(WC_VEHICLE_DETAILS, v->index);
diff --git a/src/graph_gui.cpp b/src/graph_gui.cpp
--- a/src/graph_gui.cpp
+++ b/src/graph_gui.cpp
@@ -279,7 +279,7 @@ static void GraphLegendWndProc(Window *w
 		}
 
 		case WE_CLICK:
-			if (!IS_INT_INSIDE(e->we.click.widget, 3, 11)) return;
+			if (!IsInsideMM(e->we.click.widget, 3, 11)) return;
 
 			ToggleBit(_legend_excluded_players, e->we.click.widget - 3);
 			ToggleWidgetLoweredState(w, e->we.click.widget);
@@ -1050,7 +1050,7 @@ static void PerformanceRatingDetailWndPr
 
 		case WE_CLICK:
 			/* Check which button is clicked */
-			if (IS_INT_INSIDE(e->we.click.widget, 13, 21)) {
+			if (IsInsideMM(e->we.click.widget, 13, 21)) {
 				/* Is it no on disable? */
 				if (!IsWindowWidgetDisabled(w, e->we.click.widget)) {
 					RaiseWindowWidget(w, _performance_rating_detail_player + 13);
diff --git a/src/industry_gui.cpp b/src/industry_gui.cpp
--- a/src/industry_gui.cpp
+++ b/src/industry_gui.cpp
@@ -539,8 +539,8 @@ static void IndustryViewWndProc(Window *
 			if (!IsProductionAlterable(i)) return;
 			x = e->we.click.pt.x;
 			line = (e->we.click.pt.y - WP(w, indview_d).production_offset_y) / 10;
-			if (e->we.click.pt.y >= WP(w, indview_d).production_offset_y && IS_INT_INSIDE(line, 0, 2) && i->produced_cargo[line] != CT_INVALID) {
-				if (IS_INT_INSIDE(x, 5, 25) ) {
+			if (e->we.click.pt.y >= WP(w, indview_d).production_offset_y && IsInsideMM(line, 0, 2) && i->produced_cargo[line] != CT_INVALID) {
+				if (IsInsideMM(x, 5, 25) ) {
 					/* Clicked buttons, decrease or increase production */
 					if (x < 15) {
 						if (isProductionMinimum(i, line)) return;
@@ -557,7 +557,7 @@ static void IndustryViewWndProc(Window *
 					w->flags4 |= 5 << WF_TIMEOUT_SHL;
 					WP(w, indview_d).clicked_line = line + 1;
 					WP(w, indview_d).clicked_button = (x < 15 ? 1 : 2);
-				} else if (IS_INT_INSIDE(x, 34, 160)) {
+				} else if (IsInsideMM(x, 34, 160)) {
 					/* clicked the text */
 					WP(w, indview_d).editbox_line = line;
 					SetDParam(0, i->production_rate[line] * 8);
@@ -844,7 +844,7 @@ static void IndustryDirectoryWndProc(Win
 				int y = (e->we.click.pt.y - 28) / 10;
 				uint16 p;
 
-				if (!IS_INT_INSIDE(y, 0, w->vscroll.cap)) return;
+				if (!IsInsideMM(y, 0, w->vscroll.cap)) return;
 				p = y + w->vscroll.pos;
 				if (p < _num_industry_sort) {
 					ScrollMainWindowToTile(_industry_sort[p]->xy);
diff --git a/src/main_gui.cpp b/src/main_gui.cpp
--- a/src/main_gui.cpp
+++ b/src/main_gui.cpp
@@ -1336,7 +1336,7 @@ static void ScenEditLandGenWndProc(Windo
 			HandleButtonClick(w, e->we.click.widget);
 			size += _terraform_size;
 
-			if (!IS_INT_INSIDE(size, 1, 8 + 1)) return;
+			if (!IsInsideMM(size, 1, 8 + 1)) return;
 			_terraform_size = size;
 
 			SndPlayFx(SND_15_BEEP);
diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -1917,7 +1917,7 @@ static void CheatsWndProc(Window *w, Win
 			uint x = e->we.click.pt.x;
 
 			/* not clicking a button? */
-			if (!IS_INT_INSIDE(x, 20, 40) || btn >= lengthof(_cheats_ui)) break;
+			if (!IsInsideMM(x, 20, 40) || btn >= lengthof(_cheats_ui)) break;
 
 			ce = &_cheats_ui[btn];
 			oldvalue = value = (int32)ReadValue(ce->variable, ce->type);
diff --git a/src/music_gui.cpp b/src/music_gui.cpp
--- a/src/music_gui.cpp
+++ b/src/music_gui.cpp
@@ -247,7 +247,7 @@ static void MusicTrackSelectionWndProc(W
 			byte *p;
 
 			if (msf.playlist < 4) return;
-			if (!IS_INT_INSIDE(y, 0, NUM_SONGS_AVAILABLE)) return;
+			if (!IsInsideMM(y, 0, NUM_SONGS_AVAILABLE)) return;
 
 			p = _playlists[msf.playlist];
 			for (i = 0; i != NUM_SONGS_PLAYLIST - 1; i++) {
@@ -267,7 +267,7 @@ static void MusicTrackSelectionWndProc(W
 			byte *p;
 
 			if (msf.playlist < 4) return;
-			if (!IS_INT_INSIDE(y, 0, NUM_SONGS_AVAILABLE)) return;
+			if (!IsInsideMM(y, 0, NUM_SONGS_AVAILABLE)) return;
 
 			p = _playlists[msf.playlist];
 			for (i = y; i != NUM_SONGS_PLAYLIST - 1; i++) {
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -2465,7 +2465,7 @@ static void NewSpriteGroup(byte *buf, in
 					/* Link subroutine group */
 					adjust->subroutine = GetGroupFromGroupID(setid, type, grf_load_byte(&buf));
 				} else {
-					adjust->parameter = IS_BYTE_INSIDE(adjust->variable, 0x60, 0x80) ? grf_load_byte(&buf) : 0;
+					adjust->parameter = IsInsideMM(adjust->variable, 0x60, 0x80) ? grf_load_byte(&buf) : 0;
 				}
 
 				varadjust = grf_load_byte(&buf);
diff --git a/src/oldloader.cpp b/src/oldloader.cpp
--- a/src/oldloader.cpp
+++ b/src/oldloader.cpp
@@ -302,7 +302,7 @@ static void FixOldTowns()
 
 	/* Convert town-names if needed */
 	FOR_ALL_TOWNS(town) {
-		if (IS_INT_INSIDE(town->townnametype, 0x20C1, 0x20C3)) {
+		if (IsInsideMM(town->townnametype, 0x20C1, 0x20C3)) {
 			town->townnametype = SPECSTR_TOWNNAME_ENGLISH + _opt.town_name;
 			town->townnameparts = GetOldTownName(town->townnameparts, _opt.town_name);
 		}
diff --git a/src/openttd.cpp b/src/openttd.cpp
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -1357,34 +1357,34 @@ bool AfterLoadGame()
 					if (HasBit(_m[t].m6, 3)) SetBit(_m[t].m6, 2);
 					StationGfx gfx = GetStationGfx(t);
 					StationType st;
-					if (       IS_INT_INSIDE(gfx,   0,   8)) { // Railway station
+					if (       IsInsideMM(gfx,   0,   8)) { // Railway station
 						st = STATION_RAIL;
 						SetStationGfx(t, gfx - 0);
-					} else if (IS_INT_INSIDE(gfx,   8,  67)) { // Airport
+					} else if (IsInsideMM(gfx,   8,  67)) { // Airport
 						st = STATION_AIRPORT;
 						SetStationGfx(t, gfx - 8);
-					} else if (IS_INT_INSIDE(gfx,  67,  71)) { // Truck
+					} else if (IsInsideMM(gfx,  67,  71)) { // Truck
 						st = STATION_TRUCK;
 						SetStationGfx(t, gfx - 67);
-					} else if (IS_INT_INSIDE(gfx,  71,  75)) { // Bus
+					} else if (IsInsideMM(gfx,  71,  75)) { // Bus
 						st = STATION_BUS;
 						SetStationGfx(t, gfx - 71);
 					} else if (gfx == 75) {                    // Oil rig
 						st = STATION_OILRIG;
 						SetStationGfx(t, gfx - 75);
-					} else if (IS_INT_INSIDE(gfx,  76,  82)) { // Dock
+					} else if (IsInsideMM(gfx,  76,  82)) { // Dock
 						st = STATION_DOCK;
 						SetStationGfx(t, gfx - 76);
 					} else if (gfx == 82) {                    // Buoy
 						st = STATION_BUOY;
 						SetStationGfx(t, gfx - 82);
-					} else if (IS_INT_INSIDE(gfx,  83, 168)) { // Extended airport
+					} else if (IsInsideMM(gfx,  83, 168)) { // Extended airport
 						st = STATION_AIRPORT;
 						SetStationGfx(t, gfx - 83 + 67 - 8);
-					} else if (IS_INT_INSIDE(gfx, 168, 170)) { // Drive through truck
+					} else if (IsInsideMM(gfx, 168, 170)) { // Drive through truck
 						st = STATION_TRUCK;
 						SetStationGfx(t, gfx - 168 + GFX_TRUCK_BUS_DRIVETHROUGH_OFFSET);
-					} else if (IS_INT_INSIDE(gfx, 170, 172)) { // Drive through bus
+					} else if (IsInsideMM(gfx, 170, 172)) { // Drive through bus
 						st = STATION_BUS;
 						SetStationGfx(t, gfx - 170 + GFX_TRUCK_BUS_DRIVETHROUGH_OFFSET);
 					} else {
diff --git a/src/player.h b/src/player.h
--- a/src/player.h
+++ b/src/player.h
@@ -239,7 +239,7 @@ static inline byte ActivePlayerCount()
 
 static inline Player *GetPlayer(PlayerID i)
 {
-	assert(IS_INSIDE_1D(i, PLAYER_FIRST, lengthof(_players)));
+	assert(IsInsideBS(i, PLAYER_FIRST, lengthof(_players)));
 	return &_players[i];
 }
 
@@ -250,7 +250,7 @@ static inline bool IsLocalPlayer()
 
 static inline bool IsValidPlayer(PlayerID pi)
 {
-	return IS_INSIDE_1D(pi, PLAYER_FIRST, MAX_PLAYERS);
+	return IsInsideBS(pi, PLAYER_FIRST, MAX_PLAYERS);
 }
 
 byte GetPlayerRailtypes(PlayerID p);
diff --git a/src/players.cpp b/src/players.cpp
--- a/src/players.cpp
+++ b/src/players.cpp
@@ -299,7 +299,7 @@ static void GenerateCompanyName(Player *
 
 	t = ClosestTownFromTile(tile, (uint)-1);
 
-	if (IS_INT_INSIDE(t->townnametype, SPECSTR_TOWNNAME_START, SPECSTR_TOWNNAME_LAST+1)) {
+	if (IsInsideMM(t->townnametype, SPECSTR_TOWNNAME_START, SPECSTR_TOWNNAME_LAST+1)) {
 		str = t->townnametype - SPECSTR_TOWNNAME_START + SPECSTR_PLAYERNAME_START;
 		strp = t->townnameparts;
 
diff --git a/src/road_cmd.cpp b/src/road_cmd.cpp
--- a/src/road_cmd.cpp
+++ b/src/road_cmd.cpp
@@ -647,7 +647,7 @@ CommandCost CmdBuildLongRoad(TileIndex e
 		TileIndex t = start_tile;
 		start_tile = end_tile;
 		end_tile = t;
-		p2 ^= IS_INT_INSIDE(p2 & 3, 1, 3) ? 3 : 0;
+		p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
 		drd = DRD_SOUTHBOUND;
 	}
 
@@ -730,7 +730,7 @@ CommandCost CmdRemoveLongRoad(TileIndex 
 		TileIndex t = start_tile;
 		start_tile = end_tile;
 		end_tile = t;
-		p2 ^= IS_INT_INSIDE(p2 & 3, 1, 3) ? 3 : 0;
+		p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
 	}
 
 	money.AddCost(GetAvailableMoneyForCommand());
diff --git a/src/roadveh_cmd.cpp b/src/roadveh_cmd.cpp
--- a/src/roadveh_cmd.cpp
+++ b/src/roadveh_cmd.cpp
@@ -1643,8 +1643,8 @@ again:
 			goto again;
 		}
 
-		if (IS_BYTE_INSIDE(v->u.road.state, RVSB_IN_ROAD_STOP, RVSB_IN_DT_ROAD_STOP_END) && IsTileType(v->tile, MP_STATION)) {
-			if (IsReversingRoadTrackdir(dir) && IS_BYTE_INSIDE(v->u.road.state, RVSB_IN_ROAD_STOP, RVSB_IN_ROAD_STOP_END)) {
+		if (IsInsideMM(v->u.road.state, RVSB_IN_ROAD_STOP, RVSB_IN_DT_ROAD_STOP_END) && IsTileType(v->tile, MP_STATION)) {
+			if (IsReversingRoadTrackdir(dir) && IsInsideMM(v->u.road.state, RVSB_IN_ROAD_STOP, RVSB_IN_ROAD_STOP_END)) {
 				/* New direction is trying to turn vehicle around.
 				 * We can't turn at the exit of a road stop so wait.*/
 				v->cur_speed = 0;
@@ -1766,7 +1766,7 @@ again:
 
 	new_dir = RoadVehGetSlidingDirection(v, x, y);
 
-	if (IsRoadVehFront(v) && !IS_BYTE_INSIDE(v->u.road.state, RVSB_IN_ROAD_STOP, RVSB_IN_ROAD_STOP_END)) {
+	if (IsRoadVehFront(v) && !IsInsideMM(v->u.road.state, RVSB_IN_ROAD_STOP, RVSB_IN_ROAD_STOP_END)) {
 		/* Vehicle is not in a road stop.
 		 * Check for another vehicle to overtake */
 		Vehicle* u = RoadVehFindCloseTo(v, x, y, new_dir);
@@ -1801,9 +1801,9 @@ again:
 	 * and it's the correct type of stop (bus or truck) and the frame equals the stop frame...
 	 * (the station test and stop type test ensure that other vehicles, using the road stop as
 	 * a through route, do not stop) */
-	if (IsRoadVehFront(v) && ((IS_BYTE_INSIDE(v->u.road.state, RVSB_IN_ROAD_STOP, RVSB_IN_ROAD_STOP_END) &&
+	if (IsRoadVehFront(v) && ((IsInsideMM(v->u.road.state, RVSB_IN_ROAD_STOP, RVSB_IN_ROAD_STOP_END) &&
 			_road_veh_data_1[v->u.road.state - RVSB_IN_ROAD_STOP + (_opt.road_side << RVS_DRIVE_SIDE)] == v->u.road.frame) ||
-			(IS_BYTE_INSIDE(v->u.road.state, RVSB_IN_DT_ROAD_STOP, RVSB_IN_DT_ROAD_STOP_END) &&
+			(IsInsideMM(v->u.road.state, RVSB_IN_DT_ROAD_STOP, RVSB_IN_DT_ROAD_STOP_END) &&
 			v->current_order.dest == GetStationIndex(v->tile) &&
 			GetRoadStopType(v->tile) == (IsCargoInClass(v->cargo_type, CC_PASSENGERS) ? RoadStop::BUS : RoadStop::TRUCK) &&
 			v->u.road.frame == RVC_DRIVE_THROUGH_STOP_FRAME))) {
diff --git a/src/settings.cpp b/src/settings.cpp
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1155,15 +1155,15 @@ static int32 CheckInterval(int32 p1)
 	const Patches *ptc = (_game_mode == GM_MENU) ? &_patches_newgame : &_patches;
 
 	if (p1) {
-		warning = ( (IS_INT_INSIDE(ptc->servint_trains,   5, 90 + 1) || ptc->servint_trains   == 0) &&
-								(IS_INT_INSIDE(ptc->servint_roadveh,  5, 90 + 1) || ptc->servint_roadveh  == 0) &&
-								(IS_INT_INSIDE(ptc->servint_aircraft, 5, 90 + 1) || ptc->servint_aircraft == 0) &&
-								(IS_INT_INSIDE(ptc->servint_ships,    5, 90 + 1) || ptc->servint_ships    == 0) );
+		warning = ( (IsInsideMM(ptc->servint_trains,   5, 90 + 1) || ptc->servint_trains   == 0) &&
+								(IsInsideMM(ptc->servint_roadveh,  5, 90 + 1) || ptc->servint_roadveh  == 0) &&
+								(IsInsideMM(ptc->servint_aircraft, 5, 90 + 1) || ptc->servint_aircraft == 0) &&
+								(IsInsideMM(ptc->servint_ships,    5, 90 + 1) || ptc->servint_ships    == 0) );
 	} else {
-		warning = ( (IS_INT_INSIDE(ptc->servint_trains,   30, 800 + 1) || ptc->servint_trains   == 0) &&
-								(IS_INT_INSIDE(ptc->servint_roadveh,  30, 800 + 1) || ptc->servint_roadveh  == 0) &&
-								(IS_INT_INSIDE(ptc->servint_aircraft, 30, 800 + 1) || ptc->servint_aircraft == 0) &&
-								(IS_INT_INSIDE(ptc->servint_ships,    30, 800 + 1) || ptc->servint_ships    == 0) );
+		warning = ( (IsInsideMM(ptc->servint_trains,   30, 800 + 1) || ptc->servint_trains   == 0) &&
+								(IsInsideMM(ptc->servint_roadveh,  30, 800 + 1) || ptc->servint_roadveh  == 0) &&
+								(IsInsideMM(ptc->servint_aircraft, 30, 800 + 1) || ptc->servint_aircraft == 0) &&
+								(IsInsideMM(ptc->servint_ships,    30, 800 + 1) || ptc->servint_ships    == 0) );
 	}
 
 	if (!warning)
diff --git a/src/settings_gui.cpp b/src/settings_gui.cpp
--- a/src/settings_gui.cpp
+++ b/src/settings_gui.cpp
@@ -511,7 +511,7 @@ static void GameDifficultyWndProc(Window
 				return;
 
 			x = e->we.click.pt.x - 5;
-			if (!IS_INT_INSIDE(x, 0, 21)) // Button area
+			if (!IsInsideMM(x, 0, 21)) // Button area
 				return;
 
 			y = e->we.click.pt.y - GAMEDIFF_WND_TOP_OFFSET;
@@ -1101,7 +1101,7 @@ static void CustCurrencyWndProc(Window *
 
 			switch (line) {
 				case 0: // rate
-					if (IS_INT_INSIDE(x, 10, 30)) { // clicked buttons
+					if (IsInsideMM(x, 10, 30)) { // clicked buttons
 						if (x < 20) {
 							if (_custom_currency.rate > 1) _custom_currency.rate--;
 							WP(w,def_d).data_1 = 1 << (line * 2 + 0);
@@ -1118,7 +1118,7 @@ static void CustCurrencyWndProc(Window *
 					break;
 
 				case 1: // separator
-					if (IS_INT_INSIDE(x, 10, 30)) { // clicked button
+					if (IsInsideMM(x, 10, 30)) { // clicked button
 						WP(w,def_d).data_1 = 1 << (line * 2 + 1);
 					}
 					str = BindCString(_str_separator);
@@ -1126,7 +1126,7 @@ static void CustCurrencyWndProc(Window *
 					break;
 
 				case 2: // prefix
-					if (IS_INT_INSIDE(x, 10, 30)) { // clicked button
+					if (IsInsideMM(x, 10, 30)) { // clicked button
 						WP(w,def_d).data_1 = 1 << (line * 2 + 1);
 					}
 					str = BindCString(_custom_currency.prefix);
@@ -1134,7 +1134,7 @@ static void CustCurrencyWndProc(Window *
 					break;
 
 				case 3: // suffix
-					if (IS_INT_INSIDE(x, 10, 30)) { // clicked button
+					if (IsInsideMM(x, 10, 30)) { // clicked button
 						WP(w,def_d).data_1 = 1 << (line * 2 + 1);
 					}
 					str = BindCString(_custom_currency.suffix);
@@ -1142,7 +1142,7 @@ static void CustCurrencyWndProc(Window *
 					break;
 
 				case 4: // to euro
-					if (IS_INT_INSIDE(x, 10, 30)) { // clicked buttons
+					if (IsInsideMM(x, 10, 30)) { // clicked buttons
 						if (x < 20) {
 							_custom_currency.to_euro = (_custom_currency.to_euro <= 2000) ?
 								CF_NOEURO : _custom_currency.to_euro - 1;
diff --git a/src/slope.h b/src/slope.h
--- a/src/slope.h
+++ b/src/slope.h
@@ -75,7 +75,7 @@ enum Slope {
  */
 static inline bool IsValidCorner(Corner corner)
 {
-	return IS_INT_INSIDE(corner, 0, CORNER_END);
+	return IsInsideMM(corner, 0, CORNER_END);
 }
 
 /**
@@ -294,7 +294,7 @@ static inline bool IsInclinedFoundation(
  */
 static inline bool IsNonContinuousFoundation(Foundation f)
 {
-	return IS_INT_INSIDE(f, FOUNDATION_STEEP_BOTH, FOUNDATION_HALFTILE_N + 1);
+	return IsInsideMM(f, FOUNDATION_STEEP_BOTH, FOUNDATION_HALFTILE_N + 1);
 }
 
 /**
@@ -307,7 +307,7 @@ static inline bool IsNonContinuousFounda
  */
 static inline Corner GetHalftileFoundationCorner(Foundation f)
 {
-	assert(IS_INT_INSIDE(f, FOUNDATION_HALFTILE_W, FOUNDATION_HALFTILE_N + 1));
+	assert(IsInsideMM(f, FOUNDATION_HALFTILE_W, FOUNDATION_HALFTILE_N + 1));
 	return (Corner)(f - FOUNDATION_HALFTILE_W);
 }
 
@@ -319,7 +319,7 @@ static inline Corner GetHalftileFoundati
  */
 static inline bool IsSpecialRailFoundation(Foundation f)
 {
-	return IS_INT_INSIDE(f, FOUNDATION_RAIL_W, FOUNDATION_RAIL_N + 1);
+	return IsInsideMM(f, FOUNDATION_RAIL_W, FOUNDATION_RAIL_N + 1);
 }
 
 /**
diff --git a/src/smallmap_gui.cpp b/src/smallmap_gui.cpp
--- a/src/smallmap_gui.cpp
+++ b/src/smallmap_gui.cpp
@@ -697,7 +697,7 @@ skip_column:
 
 				/* Check if y is out of bounds? */
 				y -= dpi->top;
-				if (!IS_INT_INSIDE(y, 0, dpi->height)) continue;
+				if (!IsInsideMM(y, 0, dpi->height)) continue;
 
 				/* Default is to draw both pixels. */
 				skip = false;
diff --git a/src/sound.cpp b/src/sound.cpp
--- a/src/sound.cpp
+++ b/src/sound.cpp
@@ -209,8 +209,8 @@ static void SndPlayScreenCoordFx(SoundFx
 		const ViewPort *vp = (*wz)->viewport;
 
 		if (vp != NULL &&
-				IS_INSIDE_1D(x, vp->virtual_left, vp->virtual_width) &&
-				IS_INSIDE_1D(y, vp->virtual_top, vp->virtual_height)) {
+				IsInsideBS(x, vp->virtual_left, vp->virtual_width) &&
+				IsInsideBS(y, vp->virtual_top, vp->virtual_height)) {
 			int left = (x - vp->virtual_left);
 
 			StartSound(
diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -465,7 +465,7 @@ void GetProductionAroundTiles(AcceptedCa
 
 	for (int yc = y1; yc != y2; yc++) {
 		for (int xc = x1; xc != x2; xc++) {
-			if (!(IS_INSIDE_1D(xc, x, w) && IS_INSIDE_1D(yc, y, h))) {
+			if (!(IsInsideBS(xc, x, w) && IsInsideBS(yc, y, h))) {
 				TileIndex tile = TileXY(xc, yc);
 
 				GetProducedCargoProc *gpc = _tile_type_procs[GetTileType(tile)]->get_produced_cargo_proc;
diff --git a/src/strings.cpp b/src/strings.cpp
--- a/src/strings.cpp
+++ b/src/strings.cpp
@@ -1120,20 +1120,20 @@ static char *GetSpecialPlayerNameString(
 	}
 
 	/* town name? */
-	if (IS_INT_INSIDE(ind - 6, 0, SPECSTR_TOWNNAME_LAST-SPECSTR_TOWNNAME_START + 1)) {
+	if (IsInsideMM(ind - 6, 0, SPECSTR_TOWNNAME_LAST-SPECSTR_TOWNNAME_START + 1)) {
 		buff = GetSpecialTownNameString(buff, ind - 6, GetInt32(&argv), last);
 		return strecpy(buff, " Transport", last);
 	}
 
 	/* language name? */
-	if (IS_INT_INSIDE(ind, (SPECSTR_LANGUAGE_START - 0x70E4), (SPECSTR_LANGUAGE_END - 0x70E4) + 1)) {
+	if (IsInsideMM(ind, (SPECSTR_LANGUAGE_START - 0x70E4), (SPECSTR_LANGUAGE_END - 0x70E4) + 1)) {
 		int i = ind - (SPECSTR_LANGUAGE_START - 0x70E4);
 		return strecpy(buff,
 			i == _dynlang.curr ? _langpack->own_name : _dynlang.ent[i].name, last);
 	}
 
 	/* resolution size? */
-	if (IS_INT_INSIDE(ind, (SPECSTR_RESOLUTION_START - 0x70E4), (SPECSTR_RESOLUTION_END - 0x70E4) + 1)) {
+	if (IsInsideMM(ind, (SPECSTR_RESOLUTION_START - 0x70E4), (SPECSTR_RESOLUTION_END - 0x70E4) + 1)) {
 		int i = ind - (SPECSTR_RESOLUTION_START - 0x70E4);
 		buff += snprintf(
 			buff, last - buff + 1, "%dx%d", _resolutions[i][0], _resolutions[i][1]
@@ -1142,7 +1142,7 @@ static char *GetSpecialPlayerNameString(
 	}
 
 	/* screenshot format name? */
-	if (IS_INT_INSIDE(ind, (SPECSTR_SCREENSHOT_START - 0x70E4), (SPECSTR_SCREENSHOT_END - 0x70E4) + 1)) {
+	if (IsInsideMM(ind, (SPECSTR_SCREENSHOT_START - 0x70E4), (SPECSTR_SCREENSHOT_END - 0x70E4) + 1)) {
 		int i = ind - (SPECSTR_SCREENSHOT_START - 0x70E4);
 		return strecpy(buff, GetScreenshotFormatDesc(i), last);
 	}
@@ -1168,7 +1168,7 @@ StringID RemapOldStringID(StringID s)
 		case 0xA02F: return STR_SV_AIRCRAFT_NAME;
 
 		default:
-			if (IS_INT_INSIDE(s, 0x300F, 0x3030)) {
+			if (IsInsideMM(s, 0x300F, 0x3030)) {
 				return s - 0x300F + STR_SV_STNAME;
 			} else {
 				return s;
diff --git a/src/town_gui.cpp b/src/town_gui.cpp
--- a/src/town_gui.cpp
+++ b/src/town_gui.cpp
@@ -216,7 +216,7 @@ static void TownAuthorityWndProc(Window 
 			const Town *t = GetTown(w->window_number);
 			int y = (e->we.click.pt.y - 0x6B) / 10;
 
-			if (!IS_INT_INSIDE(y, 0, 5)) return;
+			if (!IsInsideMM(y, 0, 5)) return;
 
 			y = GetNthSetBit(GetMaskOfTownActions(NULL, _local_player, t), y + w->vscroll.pos - 1);
 			if (y >= 0) {
diff --git a/src/tree_cmd.cpp b/src/tree_cmd.cpp
--- a/src/tree_cmd.cpp
+++ b/src/tree_cmd.cpp
@@ -354,7 +354,7 @@ CommandCost CmdPlantTree(TileIndex tile,
 						}
 						MarkTileDirtyByTile(tile);
 
-						if (_game_mode == GM_EDITOR && IS_INT_INSIDE(treetype, TREE_RAINFOREST, TREE_CACTUS))
+						if (_game_mode == GM_EDITOR && IsInsideMM(treetype, TREE_RAINFOREST, TREE_CACTUS))
 							SetTropicZone(tile, TROPICZONE_RAINFOREST);
 					}
 					cost.AddCost(_price.build_trees);
@@ -418,7 +418,7 @@ static void DrawTile_Trees(TileInfo *ti)
 		/* different tree styles above one of the grounds */
 		if (GetTreeGround(ti->tile) == TREE_GROUND_SNOW_DESERT &&
 				GetTreeDensity(ti->tile) >= 2 &&
-				IS_INT_INSIDE(index, TREE_SUB_ARCTIC << 2, TREE_RAINFOREST << 2)) {
+				IsInsideMM(index, TREE_SUB_ARCTIC << 2, TREE_RAINFOREST << 2)) {
 			index += 164 - (TREE_SUB_ARCTIC << 2);
 		}
 
@@ -494,7 +494,7 @@ static CommandCost ClearTile_Trees(TileI
 	}
 
 	num = GetTreeCount(tile) + 1;
-	if (IS_INT_INSIDE(GetTreeType(tile), TREE_RAINFOREST, TREE_CACTUS)) num *= 4;
+	if (IsInsideMM(GetTreeType(tile), TREE_RAINFOREST, TREE_CACTUS)) num *= 4;
 
 	if (flags & DC_EXEC) DoClearSquare(tile);
 
@@ -510,7 +510,7 @@ static void GetTileDesc_Trees(TileIndex 
 {
 	TreeType tt = GetTreeType(tile);
 
-	if (IS_INT_INSIDE(tt, TREE_RAINFOREST, TREE_CACTUS)) {
+	if (IsInsideMM(tt, TREE_RAINFOREST, TREE_CACTUS)) {
 		td->str = STR_280F_RAINFOREST;
 	} else {
 		td->str = tt == TREE_CACTUS ? STR_2810_CACTUS_PLANTS : STR_280E_TREES;
diff --git a/src/unmovable_map.h b/src/unmovable_map.h
--- a/src/unmovable_map.h
+++ b/src/unmovable_map.h
@@ -21,7 +21,7 @@ enum UnmovableType {
 	UNMOVABLE_HQ_EAST     = 0x82, ///< Offset for the eastern HQ tile
 	UNMOVABLE_HQ_SOUTH    = 0x83, ///< Offset for the southern HQ tile
 
-	/** End of the HQ (rather end + 1 for IS_INT_INSIDE) */
+	/** End of the HQ (rather end + 1 for IsInside) */
 	UNMOVABLE_HQ_END      = UNMOVABLE_HQ_NORTH + HQ_NUM_SIZE * HQ_NUM_TILE
 };
 
@@ -80,7 +80,7 @@ static inline bool IsOwnedLandTile(TileI
 static inline bool IsCompanyHQ(TileIndex t)
 {
 	assert(IsTileType(t, MP_UNMOVABLE));
-	return IS_INT_INSIDE(GetUnmovableType(t), UNMOVABLE_HQ_NORTH, UNMOVABLE_HQ_END);
+	return IsInsideMM(GetUnmovableType(t), UNMOVABLE_HQ_NORTH, UNMOVABLE_HQ_END);
 }
 
 /**
diff --git a/src/video/dedicated_v.cpp b/src/video/dedicated_v.cpp
--- a/src/video/dedicated_v.cpp
+++ b/src/video/dedicated_v.cpp
@@ -235,7 +235,7 @@ static void DedicatedHandleKeyInput()
 			if (input_line[i] == '\0')
 				break;
 
-			if (!IS_INT_INSIDE(input_line[i], ' ', 256))
+			if (!IsInsideMM(input_line[i], ' ', 256))
 				input_line[i] = ' ';
 		}
 	}
diff --git a/src/video/sdl_v.cpp b/src/video/sdl_v.cpp
--- a/src/video/sdl_v.cpp
+++ b/src/video/sdl_v.cpp
@@ -128,8 +128,8 @@ static void GetVideoModes()
 		for (i = 0; modes[i]; i++) {
 			int w = modes[i]->w;
 			int h = modes[i]->h;
-			if (IS_INT_INSIDE(w, 640, MAX_SCREEN_WIDTH + 1) &&
-					IS_INT_INSIDE(h, 480, MAX_SCREEN_HEIGHT + 1)) {
+			if (IsInsideMM(w, 640, MAX_SCREEN_WIDTH + 1) &&
+					IsInsideMM(h, 480, MAX_SCREEN_HEIGHT + 1)) {
 				int j;
 				for (j = 0; j < n; j++) {
 					if (_resolutions[j][0] == w && _resolutions[j][1] == h) break;
diff --git a/src/video/win32_v.cpp b/src/video/win32_v.cpp
--- a/src/video/win32_v.cpp
+++ b/src/video/win32_v.cpp
@@ -737,8 +737,8 @@ static void FindResolutions()
 	 * Doesn't really matter since we don't pass a string anyways, but still
 	 * a letdown */
 	for (i = 0; EnumDisplaySettingsA(NULL, i, &dm) != 0; i++) {
-		if (dm.dmBitsPerPel == BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth() && IS_INT_INSIDE(dm.dmPelsWidth, 640, MAX_SCREEN_WIDTH + 1) &&
-				IS_INT_INSIDE(dm.dmPelsHeight, 480, MAX_SCREEN_HEIGHT + 1)) {
+		if (dm.dmBitsPerPel == BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth() && IsInsideMM(dm.dmPelsWidth, 640, MAX_SCREEN_WIDTH + 1) &&
+				IsInsideMM(dm.dmPelsHeight, 480, MAX_SCREEN_HEIGHT + 1)) {
 			uint j;
 
 			for (j = 0; j < n; j++) {
diff --git a/src/viewport.cpp b/src/viewport.cpp
--- a/src/viewport.cpp
+++ b/src/viewport.cpp
@@ -344,8 +344,8 @@ ViewPort *IsPtInWindowViewport(const Win
 	ViewPort *vp = w->viewport;
 
 	if (vp != NULL &&
-	    IS_INT_INSIDE(x, vp->left, vp->left + vp->width) &&
-			IS_INT_INSIDE(y, vp->top, vp->top + vp->height))
+	    IsInsideMM(x, vp->left, vp->left + vp->width) &&
+			IsInsideMM(y, vp->top, vp->top + vp->height))
 		return vp;
 
 	return NULL;
@@ -501,7 +501,7 @@ void DrawGroundSpriteAt(SpriteID image, 
 static void AddChildSpriteToFoundation(SpriteID image, SpriteID pal, const SubSprite *sub, FoundationPart foundation_part, int extra_offs_x, int extra_offs_y)
 {
 	ViewportDrawer *vd = _cur_vd;
-	assert(IS_INT_INSIDE(foundation_part, 0, FOUNDATION_PART_END));
+	assert(IsInsideMM(foundation_part, 0, FOUNDATION_PART_END));
 	assert(vd->foundation[foundation_part] != NULL);
 	Point offs = vd->foundation_offset[foundation_part];
 
@@ -932,8 +932,8 @@ static void DrawTileSelection(const Tile
 	if (_thd.drawstyle == 0) return;
 
 	/* Inside the inner area? */
-	if (IS_INSIDE_1D(ti->x, _thd.pos.x, _thd.size.x) &&
-			IS_INSIDE_1D(ti->y, _thd.pos.y, _thd.size.y)) {
+	if (IsInsideBS(ti->x, _thd.pos.x, _thd.size.x) &&
+			IsInsideBS(ti->y, _thd.pos.y, _thd.size.y)) {
 		if (_thd.drawstyle & HT_RECT) {
 			DrawTileSelectionRect(ti, _thd.make_square_red ? PALETTE_SEL_TILE_RED : PAL_NONE);
 		} else if (_thd.drawstyle & HT_POINT) {
@@ -978,8 +978,8 @@ static void DrawTileSelection(const Tile
 	/* Check if it's inside the outer area? */
 	if (_thd.outersize.x &&
 			_thd.size.x < _thd.size.x + _thd.outersize.x &&
-			IS_INSIDE_1D(ti->x, _thd.pos.x + _thd.offs.x, _thd.size.x + _thd.outersize.x) &&
-			IS_INSIDE_1D(ti->y, _thd.pos.y + _thd.offs.y, _thd.size.y + _thd.outersize.y)) {
+			IsInsideBS(ti->x, _thd.pos.x + _thd.offs.x, _thd.size.x + _thd.outersize.x) &&
+			IsInsideBS(ti->y, _thd.pos.y + _thd.offs.y, _thd.size.y + _thd.outersize.y)) {
 		/* Draw a blue rect. */
 		DrawTileSelectionRect(ti, PALETTE_SEL_TILE_BLUE);
 		return;
@@ -1754,8 +1754,8 @@ void MarkTileDirty(int x, int y)
 	uint z = 0;
 	Point pt;
 
-	if (IS_INT_INSIDE(x, 0, MapSizeX() * TILE_SIZE) &&
-			IS_INT_INSIDE(y, 0, MapSizeY() * TILE_SIZE))
+	if (IsInsideMM(x, 0, MapSizeX() * TILE_SIZE) &&
+			IsInsideMM(y, 0, MapSizeY() * TILE_SIZE))
 		z = GetTileZ(TileVirtXY(x, y));
 	pt = RemapCoords(x, y, z);
 
diff --git a/src/water_cmd.cpp b/src/water_cmd.cpp
--- a/src/water_cmd.cpp
+++ b/src/water_cmd.cpp
@@ -334,8 +334,8 @@ static CommandCost ClearTile_Water(TileI
 			if (flags & DC_NO_WATER) return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);
 
 			/* Make sure it's not an edge tile. */
-			if (!IS_INT_INSIDE(TileX(tile), 1, MapMaxX() - 1) ||
-					!IS_INT_INSIDE(TileY(tile), 1, MapMaxY() - 1)) {
+			if (!IsInsideMM(TileX(tile), 1, MapMaxX() - 1) ||
+					!IsInsideMM(TileY(tile), 1, MapMaxY() - 1)) {
 				return_cmd_error(STR_0002_TOO_CLOSE_TO_EDGE_OF_MAP);
 			}
 
@@ -771,8 +771,8 @@ void TileLoop_Water(TileIndex tile)
 	if (IsTileType(tile, MP_WATER) && !(IsSea(tile) || IsCoast(tile))) return;
 
 	/* floods in all four diagonal directions with the exception of the edges */
-	if (IS_INT_INSIDE(TileX(tile), 1, MapSizeX() - 3 + 1) &&
-			IS_INT_INSIDE(TileY(tile), 1, MapSizeY() - 3 + 1)) {
+	if (IsInsideMM(TileX(tile), 1, MapSizeX() - 3 + 1) &&
+			IsInsideMM(TileY(tile), 1, MapSizeY() - 3 + 1)) {
 		uint i;
 
 		for (i = 0; i != lengthof(_tile_loop_offs_array); i++) {
@@ -784,19 +784,19 @@ void TileLoop_Water(TileIndex tile)
 	_current_player = OWNER_NONE;
 
 	/* edges */
-	if (TileX(tile) == 0 && IS_INT_INSIDE(TileY(tile), 1, MapSizeY() - 3 + 1)) { //NE
+	if (TileX(tile) == 0 && IsInsideMM(TileY(tile), 1, MapSizeY() - 3 + 1)) { //NE
 		TileLoopWaterHelper(tile, _tile_loop_offs_array[2]);
 	}
 
-	if (TileX(tile) == MapSizeX() - 2 && IS_INT_INSIDE(TileY(tile), 1, MapSizeY() - 3 + 1)) { //SW
+	if (TileX(tile) == MapSizeX() - 2 && IsInsideMM(TileY(tile), 1, MapSizeY() - 3 + 1)) { //SW
 		TileLoopWaterHelper(tile, _tile_loop_offs_array[0]);
 	}
 
-	if (TileY(tile) == 0 && IS_INT_INSIDE(TileX(tile), 1, MapSizeX() - 3 + 1)) { //NW
+	if (TileY(tile) == 0 && IsInsideMM(TileX(tile), 1, MapSizeX() - 3 + 1)) { //NW
 		TileLoopWaterHelper(tile, _tile_loop_offs_array[1]);
 	}
 
-	if (TileY(tile) == MapSizeY() - 2 && IS_INT_INSIDE(TileX(tile), 1, MapSizeX() - 3 + 1)) { //SE
+	if (TileY(tile) == MapSizeY() - 2 && IsInsideMM(TileX(tile), 1, MapSizeX() - 3 + 1)) { //SE
 		TileLoopWaterHelper(tile, _tile_loop_offs_array[3]);
 	}
 }
diff --git a/src/water_map.h b/src/water_map.h
--- a/src/water_map.h
+++ b/src/water_map.h
@@ -31,9 +31,9 @@ static inline WaterTileType GetWaterTile
 
 	if (_m[t].m5 == 0) return WATER_TILE_CLEAR;
 	if (_m[t].m5 == 1) return WATER_TILE_COAST;
-	if (IS_INT_INSIDE(_m[t].m5, LOCK_MIDDLE, LOCK_END)) return WATER_TILE_LOCK;
+	if (IsInsideMM(_m[t].m5, LOCK_MIDDLE, LOCK_END)) return WATER_TILE_LOCK;
 
-	assert(IS_INT_INSIDE(_m[t].m5, DEPOT_NORTH, DEPOT_END));
+	assert(IsInsideMM(_m[t].m5, DEPOT_NORTH, DEPOT_END));
 	return WATER_TILE_DEPOT;
 }
 
@@ -72,7 +72,7 @@ static inline TileIndex GetOtherShipDepo
 
 static inline TileIndex IsShipDepot(TileIndex t)
 {
-	return IS_INT_INSIDE(_m[t].m5, DEPOT_NORTH, DEPOT_END);
+	return IsInsideMM(_m[t].m5, DEPOT_NORTH, DEPOT_END);
 }
 
 static inline Axis GetShipDepotAxis(TileIndex t)
diff --git a/src/window.cpp b/src/window.cpp
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -953,7 +953,7 @@ Window *FindWindowFromPt(int x, int y)
 
 	for (wz = _last_z_window; wz != _z_windows;) {
 		Window *w = *--wz;
-		if (IS_INSIDE_1D(x, w->left, w->width) && IS_INSIDE_1D(y, w->top, w->height)) {
+		if (IsInsideBS(x, w->left, w->width) && IsInsideBS(y, w->top, w->height)) {
 			return w;
 		}
 	}