Ling Space Adaption (#10982)

code/modules/mob/living/carbon/breathe.dm

@@ -21,7 +21,11 @@
 	return from.trans_to_holder(target,amount,multiplier,copy) //complete transfer
 
 /mob/living/carbon/proc/breathe(var/volume_needed = BREATH_VOLUME)
-	if(species && (species.flags & NO_BREATHE)) return
+	if(species && (species.flags & NO_BREATHE))
+		return
+	var/datum/changeling/changeling = get_antag_datum(MODE_CHANGELING)
+	if(changeling?.space_adapted)
+		return
 	
 	volume_needed *= (species?.breath_vol_mul || 1)
 

code/modules/mob/living/carbon/human/human.dm

@@ -1851,9 +1851,8 @@
 
 /mob/living/carbon/human/need_breathe()
 	if(!(mNobreath in mutations) && species.breathing_organ && species.has_organ[species.breathing_organ])
-		return 1
-	else
-		return 0
+		return TRUE
+	return FALSE
 
 //Get fluffy numbers
 /mob/living/carbon/human/proc/blood_pressure()

code/modules/mob/living/carbon/human/human_helpers.dm

@@ -279,4 +279,12 @@
 		set_death_time(CREW, world.time)
 
 /mob/living/carbon/human/get_contained_external_atoms()
-	. = ..() - organs
+	. = ..() - organs
+
+/mob/living/carbon/human/proc/pressure_resistant()
+	if(COLD_RESISTANCE in mutations)
+		return TRUE
+	var/datum/changeling/changeling = get_antag_datum(MODE_CHANGELING)
+	if(changeling?.space_adapted)
+		return TRUE
+	return FALSE

code/modules/mob/living/carbon/human/life.dm

@@ -427,7 +427,7 @@
 	else if(adjusted_pressure >= species.hazard_low_pressure)
 		pressure_alert = -1
 	else
-		if(!(COLD_RESISTANCE in mutations))
+		if(!pressure_resistant())
 			var/list/obj/item/organ/external/organs = get_damageable_organs()
 			for(var/obj/item/organ/external/O in organs)
 				if(QDELETED(O))

code/modules/mob/mob_helpers.dm

@@ -1206,7 +1206,11 @@ proc/is_blind(A)
 	sdisabilities &= ~DEAF
 
 /mob/proc/get_antag_datum(var/antag_role)
-	return
+	if(!mind)
+		return
+	var/datum/D = mind.antag_datums[antag_role]
+	if(D)
+		return D
 
 /mob/dump_contents()
 	for(var/thing in get_contained_external_atoms())
@@ -1223,4 +1227,4 @@ proc/is_blind(A)
 		var/obj/item/grab/G = thing
 		if(G.state >= GRAB_NECK)
 			return TRUE
-	return FALSE
+	return FALSE