[MIRROR] null equality to isnull

code/_helpers/unsorted.dm

@@ -148,7 +148,7 @@ Turf and target are seperate in case you want to teleport some distance from a t
 
 
 /proc/LinkBlocked(turf/A, turf/B)
-	if(A == null || B == null) return 1
+	if(isnull(A) || isnull(B)) return 1
 	var/adir = get_dir(A,B)
 	var/rdir = get_dir(B,A)
 	if((adir & (NORTH|SOUTH)) && (adir & (EAST|WEST)))	//	diagonal

code/controllers/subsystems/ambient_lighting.dm

@@ -167,7 +167,7 @@ SUBSYSTEM_DEF(ambient_lighting) //A simple SS that handles updating ambient ligh
  */
 /datum/controller/subsystem/ambient_lighting/proc/create_ambient_group(color, multiplier)
 
-	if(ambient_groups[SPACE_AMBIENT_GROUP] == null) //Something (probably a planet) wants to add an ambient group, add space first
+	if(isnull(ambient_groups[SPACE_AMBIENT_GROUP])) //Something (probably a planet) wants to add an ambient group, add space first
 		add_space_ambient_group()
 
 	// Find the first free index in the bitmap.
@@ -196,7 +196,7 @@ SUBSYSTEM_DEF(ambient_lighting) //A simple SS that handles updating ambient ligh
 
 /datum/controller/subsystem/ambient_lighting/Initialize(start_timeofday)
 	//Create space ambient group if nothing created it until now.
-	if(ambient_groups[SPACE_AMBIENT_GROUP] == null)
+	if(isnull(ambient_groups[SPACE_AMBIENT_GROUP]))
 		add_space_ambient_group()
 
 	fire(FALSE, TRUE)

code/controllers/subsystems/zcopy.dm

@@ -261,7 +261,7 @@ SUBSYSTEM_DEF(zcopy)
 			TO.plane = t_target
 			TO.mouse_opacity = initial(TO.mouse_opacity)
 
-		T.queue_ao(T.ao_neighbors_mimic == null)	// If ao_neighbors hasn't been set yet, we need to do a rebuild
+		T.queue_ao(isnull(T.ao_neighbors_mimic))	// If ao_neighbors hasn't been set yet, we need to do a rebuild
 
 		// Explicitly copy turf delegates so they show up properly on below levels.
 		//   I think it's possible to get this to work without discrete delegate copy objects, but I'd rather this just work.
@@ -495,7 +495,7 @@ SUBSYSTEM_DEF(zcopy)
 
 		if (mutated)
 			for (var/i in 1 to length(fixed_overlays))
-				if (fixed_overlays[i] == null)
+				if (isnull(fixed_overlays[i]))
 					fixed_overlays[i] = appearance:overlays[i]
 
 	// Scan & fix underlays
@@ -512,7 +512,7 @@ SUBSYSTEM_DEF(zcopy)
 
 		if (mutated)
 			for (var/i in 1 to  length(fixed_overlays))
-				if (fixed_underlays[i] == null)
+				if (isnull(fixed_underlays[i]))
 					fixed_underlays[i] = appearance:underlays[i]
 
 	// If we did nothing (no violations), don't bother creating a new appearance
@@ -538,7 +538,7 @@ SUBSYSTEM_DEF(zcopy)
 
 	return MA
 
-#define FMT_DEPTH(X) (X == null ? "(null)" : X)
+#define FMT_DEPTH(X) (isnull(X) ? "(null)" : X)
 
 // This is a dummy object used so overlays can be shown in the analyzer.
 /atom/movable/openspace/debug

code/game/antagonist/antagonist.dm

@@ -200,7 +200,7 @@
 //so that they do not occupy regular job slots. All other antag roles should be spawned after jobs are
 //assigned, so that job restrictions can be respected.
 /datum/antagonist/proc/attempt_spawn(spawn_target = null)
-	if(spawn_target == null)
+	if(isnull(spawn_target))
 		spawn_target = initial_spawn_target
 
 	// Update our boundaries.

code/game/gamemodes/changeling/modularchangling.dm

@@ -460,7 +460,7 @@ var/global/list/datum/power/changeling/powerinstances = list()
 			break
 
 
-	if(Thepower == null)
+	if(isnull(Thepower))
 		to_chat(M.current, "This is awkward.  Changeling power purchase failed, please report this bug to a coder!")
 		return
 

code/game/machinery/computer/arcade_orion.dm

@@ -87,7 +87,7 @@
 
 /obj/machinery/computer/arcade/orion_trail/interact(mob/user)
 	var/dat = ""
-	if(event == null)
+	if(isnull(event))
 		newgame()
 	user.set_machine(src)
 	switch(view)
@@ -201,7 +201,7 @@
 
 			if(!href_list["food"])
 				var/temp = supplies["5"] - travel/1000 * (href_list["slow"] ? 2 : 1)
-				if(temp < 0 && (distance-travel != 0) && next_event == null) //uh oh. Better start a fuel event.
+				if(temp < 0 && (distance-travel != 0) && isnull(next_event)) //uh oh. Better start a fuel event.
 					next_event = ORION_TRAIL_STUCK
 					travel -= (temp*-1)*1000/(href_list["slow"] ? 2 : 1)
 					temp = 0
@@ -219,7 +219,7 @@
 				event_desc = "You and your crew starved to death, never to reach Orion."
 				supplies["4"] = 0
 
-			if(distance == 0 && next_event == null) //POOORT!
+			if(distance == 0 && isnull(next_event)) //POOORT!
 				port++
 				event = ORION_TRAIL_SPACEPORT
 				distance = stop_distance[port]
@@ -294,7 +294,7 @@
 	if(!specific)
 		specific = rand(1,length(settlers))
 
-	event_info += "The crewmember, [settlers[specific]] [desc == null ? "has died!":"[desc]"]<BR>"
+	event_info += "The crewmember, [settlers[specific]] [isnull(desc) ? "has died!":"[desc]"]<BR>"
 	settlers -= settlers[specific]
 	if(num_traitors > 0 && prob(100/max(1,length(settlers)-1)))
 		num_traitors--

code/game/machinery/computer/message.dm

@@ -286,7 +286,7 @@
 
 	//Request Console Logs - KEY REQUIRED
 	if(href_list["viewr"])
-		if(src.linkedServer == null || (src.linkedServer.inoperable()))
+		if(isnull(src.linkedServer) || (src.linkedServer.inoperable()))
 			message = noserver
 		else
 			if(auth)

code/game/machinery/doors/airlock_control.dm

@@ -185,7 +185,7 @@
 		var/datum/gas_mixture/air_sample = return_air()
 		var/pressure = round(air_sample.return_pressure(),0.1)
 
-		if(abs(pressure - previousPressure) > 0.001 || previousPressure == null)
+		if(abs(pressure - previousPressure) > 0.001 || isnull(previousPressure))
 			var/datum/signal/signal = new
 			signal.transmission_method = 1 //radio signal
 			signal.data["tag"] = id_tag

code/game/machinery/doors/firedoor.dm

@@ -113,7 +113,7 @@
 				o += "EAST: "
 			if(4)
 				o += "WEST: "
-		if(tile_info[index] == null)
+		if(isnull(tile_info[index]))
 			o += SPAN_WARNING("DATA UNAVAILABLE")
 			to_chat(user, o)
 			continue
@@ -343,7 +343,7 @@
 		var/old_alerts = dir_alerts
 		for(var/index = 1; index <= 4; index++)
 			var/list/tileinfo = tile_info[index]
-			if(tileinfo == null)
+			if(isnull(tileinfo))
 				continue // Bad data.
 			var/celsius = convert_k2c(tileinfo[1])
 

code/game/machinery/nuclear_bomb.dm

@@ -272,7 +272,7 @@ var/global/bomb_set
 					code = null
 				else
 					lastentered = text("[]", href_list["type"])
-					if(text2num(lastentered) == null)
+					if(isnull(text2num_or_default(lastentered)))
 						log_and_message_admins("tried to exploit a nuclear bomb by entering non-numerical codes")
 					else
 						code += lastentered

code/game/machinery/teleporter/beacon.dm

@@ -65,7 +65,7 @@ var/global/const/TELEBEACON_WIRE_SIGNALLER = 4
 		var/new_name = input(user, "What label would you like to set this beacon to? Leave empty to enable automatic naming based on area.", "Set Beacon Label", beacon_name) as text|null
 		if (QDELETED(src))
 			return TRUE
-		if (new_name == null)
+		if (isnull(new_name))
 			autoset_name = TRUE
 			generate_name()
 			user.visible_message(

code/game/movietitles.dm

@@ -24,7 +24,7 @@ GLOBAL_LIST(end_titles)
 
 		if(mob.get_preference_value(/datum/client_preference/play_lobby_music) == GLOB.PREF_YES)
 			sound_to(mob, sound(null, channel = GLOB.lobby_sound_channel))
-			if(GLOB.end_credits_song == null)
+			if(isnull(GLOB.end_credits_song))
 				var/title_song = pick('sound/music/THUNDERDOME.ogg', 'sound/music/europa/Chronox_-_03_-_In_Orbit.ogg', 'sound/music/europa/asfarasitgets.ogg')
 				sound_to(mob, sound(title_song, wait = 0, volume = 40, channel = GLOB.lobby_sound_channel))
 			else if(get_preference_value(/datum/client_preference/play_admin_midis) == GLOB.PREF_YES)
@@ -118,7 +118,7 @@ GLOBAL_LIST(end_titles)
 			continue
 		if(H.is_species(SPECIES_MONKEY) && findtext(H.real_name,"[lowertext(H.species.name)]")) //no monki
 			continue
-		if(H.last_ckey == null) //don't mention these losers (prespawned corpses mostly)
+		if(isnull(H.last_ckey)) //don't mention these losers (prespawned corpses mostly)
 			continue
 		if(!length(cast) && !chunksize)
 			chunk += "CAST:"
@@ -159,7 +159,7 @@ GLOBAL_LIST(end_titles)
 	var/list/corpses = list()
 	var/list/monkies = list()
 	for(var/mob/living/carbon/human/H in GLOB.dead_mobs)
-		if(H.last_ckey == null) //no prespawned corpses
+		if(isnull(H.last_ckey)) //no prespawned corpses
 			continue
 		if(H.is_species(SPECIES_MONKEY) && findtext(H.real_name,"[lowertext(H.species.name)]"))
 			monkies[H.species.name] += 1

code/game/objects/effects/fire/fire.dm

@@ -66,7 +66,7 @@
 	if(open_turf.turf_fire)
 		return INITIALIZE_HINT_QDEL
 
-	if(fire_color && ((color != fire_color) && color == null)) //Take colour from proc unless base colour was already custom
+	if(fire_color && ((color != fire_color) && isnull(color))) //Take colour from proc unless base colour was already custom
 		color = fire_color
 	if(color != null)
 		set_color(color)

code/game/objects/effects/spawners/bombspawner.dm

@@ -115,13 +115,13 @@
 	var/obj/spawner/newbomb/proto = /obj/spawner/newbomb/radio/custom
 
 	var/p = input("Enter phoron amount (mol):","Phoron", initial(proto.phoron_amt)) as num|null
-	if(p == null) return
+	if(isnull(p)) return
 
 	var/o = input("Enter oxygen amount (mol):","Oxygen", initial(proto.oxygen_amt)) as num|null
-	if(o == null) return
+	if(isnull(o)) return
 
 	var/c = input("Enter carbon dioxide amount (mol):","Carbon Dioxide", initial(proto.carbon_amt)) as num|null
-	if(c == null) return
+	if(isnull(c)) return
 
 	new /obj/spawner/newbomb/radio/custom(get_turf(mob), p, o, c)
 

code/game/objects/items/weapons/grenades/grenade.dm

@@ -31,7 +31,7 @@
 		if(det_time > 1)
 			to_chat(user, "The timer is set to [det_time/10] seconds.")
 			return
-		if(det_time == null)
+		if(isnull(det_time))
 			return
 		to_chat(user, "\The [src] is set for instant detonation.")
 

code/game/objects/items/weapons/implants/implants/compressed.dm

@@ -8,7 +8,7 @@
 	var/obj/item/scanned
 
 /obj/item/implant/compressed/trigger(emote, mob/source)
-	if (src.scanned == null)
+	if (isnull(src.scanned))
 		return 0
 
 	if (emote == src.activation_emote)
@@ -53,7 +53,7 @@
 	var/obj/item/implant/compressed/c = imp
 	if (!c || !istype(M, /mob/living/carbon))
 		return FALSE
-	if (c.scanned == null)
+	if (isnull(c.scanned))
 		to_chat(user, "Please compress an object with the implanter first.")
 		return TRUE
 	else return ..()

code/game/objects/items/weapons/policetape.dm

@@ -300,7 +300,7 @@ var/global/list/tape_roll_applications = list()
 		var/turf/F = A
 		var/direction = user.loc == F ? user.dir : turn(user.dir, 180)
 		var/hazard_overlay = GLOB.hazard_overlays["[direction]"]
-		if(tape_roll_applications[F] == null)
+		if(isnull(tape_roll_applications[F]))
 			tape_roll_applications[F] = 0
 
 		if(tape_roll_applications[F] & direction)

code/game/objects/items/weapons/storage/storage_ui/default.dm

@@ -132,7 +132,7 @@
 //Creates the storage UI
 /datum/storage_ui/default/prepare_ui()
 	//if storage slots is null then use the storage space UI, otherwise use the slots UI
-	if(storage.storage_slots == null)
+	if(isnull(storage.storage_slots))
 		space_orient_objs()
 	else
 		slot_orient_objs()

code/game/objects/structures/transit_tubes.dm

@@ -93,7 +93,7 @@
 /obj/structure/transit_tube/New(loc)
 	..(loc)
 
-	if(tube_dirs == null)
+	if(isnull(tube_dirs))
 		init_dirs()
 
 
@@ -314,7 +314,7 @@
 					current_tube = tube
 					break
 
-			if(current_tube == null)
+			if(isnull(current_tube))
 				set_dir(next_dir)
 				Move(get_step(loc, dir)) // Allow collisions when leaving the tubes.
 				break
@@ -446,7 +446,7 @@
 	for(var/direction in tube_dir_list)
 		var/location = get_step(loc, direction)
 		for(var/obj/structure/transit_tube/tube in location)
-			if(tube.directions() == null && tube.icon_state == "auto")
+			if(isnull(tube.directions()) && tube.icon_state == "auto")
 				connected_auto += direction
 				break
 

code/modules/admin/admin.dm

@@ -1322,7 +1322,7 @@ GLOBAL_VAR_INIT(skip_allow_lists, FALSE)
 		else
 			to_chat(usr, "<b>SOMETHING SILICON [key_name(S, usr)]'s laws:</b>")
 
-		if (S.laws == null)
+		if (isnull(S.laws))
 			to_chat(usr, "[key_name(S, usr)]'s laws are null?? Contact a coder.")
 		else
 			S.laws.show_laws(usr)

code/modules/admin/verbs/SDQL_2/SDQL_2_parser.dm

@@ -396,7 +396,7 @@
 		do
 			tok = token(i)
 			if (tok == "," || tok == ":")
-				if (temp_expression_list == null)
+				if (isnull(temp_expression_list))
 					parse_error("Found ',' or ':' without expression in an array.")
 					return i + 1
 

code/modules/admin/verbs/massmodvar.dm

@@ -169,7 +169,7 @@
 
 		if("text")
 			var/new_value = input("Enter new text:","Text",O.vars[variable]) as text|null//todo: sanitize ???
-			if(new_value == null) return
+			if(isnull(new_value)) return
 			O.vars[variable] = new_value
 
 			if(method)
@@ -206,7 +206,7 @@
 		if("num")
 			var/new_value = input("Enter new number:","Num",\
 					O.vars[variable]) as num|null
-			if(new_value == null) return
+			if(isnull(new_value)) return
 			O.vars[variable] = new_value
 
 			if(method)
@@ -244,7 +244,7 @@
 		if("type")
 			var/new_value
 			new_value = select_subpath(within_scope = /datum)
-			if(new_value == null) return
+			if(isnull(new_value)) return
 			O.vars[variable] = new_value
 			if(method)
 				if(istype(O, /mob))
@@ -279,7 +279,7 @@
 
 		if("file")
 			var/new_value = input("Pick file:","File",O.vars[variable]) as null|file
-			if(new_value == null) return
+			if(isnull(new_value)) return
 			O.vars[variable] = new_value
 
 			if(method)
@@ -315,7 +315,7 @@
 
 		if("icon")
 			var/new_value = input("Pick icon:","Icon",O.vars[variable]) as null|icon
-			if(new_value == null) return
+			if(isnull(new_value)) return
 			O.vars[variable] = new_value
 			if(method)
 				if(istype(O, /mob))