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#pragma once
#include "../BlockEntities/BlockEntity.h"
#include "WorldStorage.h"
#include "FastNBT.h"
#include "StringCompression.h"
// fwd:
class cItem;
class cItemGrid;
class cMonster;
class cProjectileEntity;
class cHangingEntity;
class cUUID;
class ChunkBlockData;
/** Implements the Anvil world storage schema. */
class cWSSAnvil : public cWSSchema
{
using Super = cWSSchema;
public:
cWSSAnvil(cWorld * a_World, int a_CompressionFactor);
virtual ~cWSSAnvil() override;
protected:
enum
{
/** Maximum number of chunks in an MCA file - also the count of the header items */
MCA_MAX_CHUNKS = 32 * 32,
/** The MCA header is 8 KiB */
MCA_HEADER_SIZE = MCA_MAX_CHUNKS * 8,
/** There are 5 bytes of header in front of each chunk */
MCA_CHUNK_HEADER_LENGTH = 5,
};
class cMCAFile
{
public:
cMCAFile(cWSSAnvil & a_ParentSchema, const AString & a_FileName, int a_RegionX, int a_RegionZ);
bool GetChunkData(const cChunkCoords & a_Chunk, ContiguousByteBuffer & a_Data);
bool SetChunkData(const cChunkCoords & a_Chunk, ContiguousByteBufferView a_Data);
int GetRegionX() const { return m_RegionX; }
int GetRegionZ() const { return m_RegionZ; }
const AString & GetFileName() const { return m_FileName; }
protected:
cWSSAnvil & m_ParentSchema;
int m_RegionX;
int m_RegionZ;
cFile m_File;
AString m_FileName;
// The header, copied from the file so we don't have to seek to it all the time
// First 1024 entries are chunk locations - the 3 + 1 byte sector-offset and sector-count
unsigned m_Header[MCA_MAX_CHUNKS];
// Chunk timestamps, following the chunk headers
unsigned m_TimeStamps[MCA_MAX_CHUNKS];
/** Finds a free location large enough to hold a_Data. Returns the sector number. */
unsigned FindFreeLocation(int a_LocalX, int a_LocalZ, size_t a_DataSize);
/** Opens a MCA file either for a Read operation (fails if doesn't exist) or for a Write operation (creates new
* if not found) */
bool OpenFile(bool a_IsForReading);
};
/** Protects m_Files against multithreaded access. */
cCriticalSection m_CS;
/** A MRU cache of MCA files.
Protected against multithreaded access by m_CS. */
std::list<std::shared_ptr<cMCAFile>> m_Files;
Compression::Extractor m_Extractor;
Compression::Compressor m_Compressor;
/** Reports that the specified chunk failed to load and saves the chunk data to an external file. */
void ChunkLoadFailed(
const cChunkCoords a_ChunkCoords,
const AString & a_Reason,
ContiguousByteBufferView a_ChunkDataToSave
);
/** Gets chunk data from the correct file; locks file CS as needed */
bool GetChunkData(const cChunkCoords & a_Chunk, ContiguousByteBuffer & a_Data);
/** Copies a_Length bytes of data from the specified NBT Tag's Child into the a_Destination buffer */
const std::byte * GetSectionData(const cParsedNBT & a_NBT, int a_Tag, const AString & a_ChildName, size_t a_Length);
/** Sets chunk data into the correct file; locks file CS as needed */
bool SetChunkData(const cChunkCoords & a_Chunk, ContiguousByteBufferView a_Data);
/** Loads the chunk from the data (no locking needed) */
bool LoadChunkFromData(const cChunkCoords & a_Chunk, ContiguousByteBufferView a_Data);
/** Saves the chunk into datastream (no locking needed) */
Compression::Result SaveChunkToData(const cChunkCoords & a_Chunk);
/** Loads the chunk from NBT data (no locking needed).
a_RawChunkData is the raw (compressed) chunk data, used for offloading when chunk loading fails. */
bool LoadChunkFromNBT(
const cChunkCoords & a_Chunk,
const cParsedNBT & a_NBT,
ContiguousByteBufferView a_RawChunkData
);
/** Loads the chunk's biome map into a_BiomeMap if biomes present and valid; returns false otherwise. */
bool LoadBiomeMapFromNBT(cChunkDef::BiomeMap & a_BiomeMap, const cParsedNBT & a_NBT, int a_TagIdx);
/** Loads the chunk's height map into a_HeightMap if heights present and valid; returns false otherwise. */
bool LoadHeightMapFromNBT(cChunkDef::HeightMap & a_HeightMap, const cParsedNBT & a_NBT, int a_TagIdx);
/** Loads the chunk's entities from NBT data (a_Tag is the Level\\Entities list tag; may be -1) */
void LoadEntitiesFromNBT(cEntityList & a_Entitites, const cParsedNBT & a_NBT, int a_Tag);
/** Loads the chunk's BlockEntities from NBT data (a_Tag is the Level\\TileEntities list tag; may be -1) */
void LoadBlockEntitiesFromNBT(
cBlockEntities & a_BlockEntitites,
const cParsedNBT & a_NBT,
int a_Tag,
const ChunkBlockData & a_BlockData
);
/** Loads the data for a block entity from the specified NBT tag.
Returns the loaded block entity, or nullptr upon failure. */
OwnedBlockEntity LoadBlockEntityFromNBT(
const cParsedNBT & a_NBT,
int a_Tag,
Vector3i a_Pos,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta
);
/** Loads a cItem contents from the specified NBT tag; returns true if successful. Doesn't load the Slot tag */
bool LoadItemFromNBT(cItem & a_Item, const cParsedNBT & a_NBT, int a_TagIdx);
/** Loads contentents of an Items[] list tag into a cItemGrid
ItemGrid begins at the specified slot offset
Slots outside the ItemGrid range are ignored */
void LoadItemGridFromNBT(cItemGrid & a_ItemGrid, const cParsedNBT & a_NBT, int a_ItemsTagIdx, int s_SlotOffset = 0);
/** Decodes the text contained within a sign.
Older versions used direct string representation, newer versions use JSON-formatted string.
This function extracts the text from either version. */
AString DecodeSignLine(const AString & a_Line);
/** Returns true iff the "id" child tag inside the specified tag equals (case-sensitive) any of the specified
expected types. Logs a warning to the console on mismatch. The coordinates are used only for the log message. */
bool CheckBlockEntityType(
const cParsedNBT & a_NBT,
int a_TagIdx,
const AStringVector & a_ExpectedTypes,
Vector3i a_Pos
);
OwnedBlockEntity LoadBannerFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadBeaconFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadBedFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadBrewingstandFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadChestFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadCommandBlockFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadDispenserFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadDropperFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadEnchantingTableFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadEnderChestFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadEndPortalFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadFlowerPotFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadFurnaceFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadHopperFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadJukeboxFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadMobHeadFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadMobSpawnerFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadNoteBlockFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
OwnedBlockEntity LoadSignFromNBT(
const cParsedNBT & a_NBT,
int a_TagIdx,
BLOCKTYPE a_BlockType,
NIBBLETYPE a_BlockMeta,
Vector3i a_Pos
);
void LoadEntityFromNBT(
cEntityList & a_Entities,
const cParsedNBT & a_NBT,
int a_EntityTagIdx,
std::string_view a_EntityName
);
void LoadBoatFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadEnderCrystalFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadFallingBlockFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadPickupFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadTNTFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadExpOrbFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadHangingFromNBT(cHangingEntity & a_Hanging, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadItemFrameFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadLeashKnotFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadPaintingFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadOldMinecartFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadMinecartRFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadMinecartCFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadMinecartFFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadMinecartTFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadMinecartHFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadArrowFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadSplashPotionFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadSnowballFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadEggFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadFireballFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadFireChargeFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadThrownEnderpearlFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadBatFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadBlazeFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadCatFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadCaveSpiderFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadChickenFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadCodFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadCowFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadCreeperFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadDolphinFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadDonkeyFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadDrownedFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadElderGuardianFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadEnderDragonFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadEndermanFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadEndermiteFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadEvokerFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadFoxFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadGhastFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadGiantFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadGuardianFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadHorseFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadHoglinFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadHuskFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadIllusionerFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadIronGolemFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadLlamaFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadMagmaCubeFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadMooshroomFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadMuleFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadOcelotFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadPandaFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadParrotFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadPhantomFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadPigFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadPiglinFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadPiglinBruteFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadPillagerFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadPolarBearFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadPufferfishFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadRabbitFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadRavagerFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadSalmonFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadSheepFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadShulkerFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadSilverfishFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadSkeletonFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadSkeletonHorseFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadSlimeFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadSnowGolemFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadSpiderFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadSquidFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadStrayFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadStriderFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadTraderLlamaFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadTropicalFishFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadTurtleFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadVexFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadVillagerFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadVindicatorFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadWanderingTraderFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadWitchFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadWitherFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadWitherSkeletonFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadWolfFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadZoglinFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadZombieFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadZombieHorseFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadZombifiedPiglinFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
void LoadZombieVillagerFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_TagIdx);
/** Loads the owner name and UUID from the entity at the specified NBT tag.
Returns a pair of {name, uuid}. If the entity is not owned, name is an empty string and uuid is nil. */
std::pair<AString, cUUID> LoadEntityOwner(const cParsedNBT & a_NBT, int a_TagIdx);
/** Loads entity common data from the NBT compound; returns true if successful */
bool LoadEntityBaseFromNBT(cEntity & a_Entity, const cParsedNBT & a_NBT, int a_TagIdx);
/** Loads monster common data from the NBT compound; returns true if successful */
bool LoadMonsterBaseFromNBT(cMonster & a_Monster, const cParsedNBT & a_NBT, int a_TagIdx);
/** Loads the position to where is leashed the monster */
void LoadLeashToPosition(cMonster & a_Monster, const cParsedNBT & a_NBT, int a_TagIdx);
/** Loads projectile common data from the NBT compound; returns true if successful */
bool LoadProjectileBaseFromNBT(cProjectileEntity & a_Entity, const cParsedNBT & a_NBT, int a_TagIx);
/** Loads an array of doubles of the specified length from the specified NBT list tag a_TagIdx; returns true if
* successful */
bool LoadDoublesListFromNBT(double * a_Doubles, int a_NumDoubles, const cParsedNBT & a_NBT, int a_TagIdx);
/** Loads an array of floats of the specified length from the specified NBT list tag a_TagIdx; returns true if
* successful */
bool LoadFloatsListFromNBT(float * a_Floats, int a_NumFloats, const cParsedNBT & a_NBT, int a_TagIdx);
/** Helper function for extracting the X, Y, and Z int subtags of a NBT compound; returns true if successful */
bool GetBlockEntityNBTPos(const cParsedNBT & a_NBT, int a_TagIdx, Vector3i & a_AbsPos);
/** Gets the correct MCA file either from cache or from disk, manages the m_MCAFiles cache; assumes m_CS is locked
*/
std::shared_ptr<cMCAFile> LoadMCAFile(const cChunkCoords & a_Chunk);
// cWSSchema overrides:
virtual bool LoadChunk(const cChunkCoords & a_Chunk) override;
virtual bool SaveChunk(const cChunkCoords & a_Chunk) override;
virtual const AString GetName() const override { return "anvil"; }
};
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