up3

server/world/mcdb/keys.go

@@ -0,0 +1,57 @@
+package mcdb
+
+//lint:file-ignore U1000 Unused unexported constants are present for future code using these.
+
+// Keys on a per-sub chunk basis. These are prefixed by the chunk coordinates and subchunk ID.
+const (
+	keySubChunkData = '/' // 2f
+)
+
+// Keys on a per-chunk basis. These are prefixed by only the chunk coordinates.
+const (
+	// keyVersion holds a single byte of data with the version of the chunk.
+	keyVersion = ',' // 2c
+	// keyVersionOld was replaced by keyVersion. It is still used by vanilla to check compatibility, but vanilla no
+	// longer writes this tag.
+	keyVersionOld = 'v' // 76
+	// keyBlockEntities holds n amount of NBT compound tags appended to each other (not a TAG_List, just appended). The
+	// compound tags contain the position of the block entities.
+	keyBlockEntities = '1' // 31
+	// keyEntitiesOld holds n amount of NBT compound tags appended to each other (not a TAG_List, just appended). The
+	// compound tags contain the position of the entities.
+	keyEntitiesOld = '2' // 32
+	// keyPendingScheduledTicks holds an NBT structure containing all scheduled
+	// ticks that were pending in the chunk.
+	keyPendingScheduledTicks = '3'
+	// keyFinalisation contains a single LE int32 that indicates the state of generation of the chunk. If 0, the chunk
+	// needs to be ticked. If 1, the chunk needs to be populated and if 2 (which is the state generally found in world
+	// saves from vanilla), the chunk is fully finalised.
+	keyFinalisation = '6' // 36
+	// key3DData holds 3-dimensional biomes for the entire chunk.
+	key3DData = '+' // 2b
+	// key2DData is no longer used in worlds with world height change. It was replaced by key3DData in newer worlds
+	// which has 3-dimensional biomes.
+	key2DData = '-' // 2d
+	// keyChecksum holds a list of checksums of some sort. It's not clear of what data this checksum is composed or what
+	// these checksums are used for.
+	keyChecksums = ';' // 3b
+
+	keyEntityIdentifiers = "digp"
+
+	keyEntity = "actorprefix"
+)
+
+// Keys on a per-world basis. These are found only once in a leveldb world save.
+const (
+	keyAutonomousEntities = "AutonomousEntities"
+	keyOverworld          = "Overworld"
+	keyMobEvents          = "mobevents"
+	keyBiomeData          = "BiomeData"
+	keyScoreboard         = "scoreboard"
+	keyLocalPlayer        = "~local_player"
+)
+
+const (
+	finalisationGenerated = iota + 1
+	finalisationPopulated
+)