Package org.lwjgl.util.meow

Class Meow

java.lang.Object

org.lwjgl.util.meow.Meow

public class Meow
extends Object

Native bindings to Meow hash, an extremely fast non-cryptographic hash.

Q: What is it?
A: Meow is a 128-bit non-cryptographic hash that operates at high speeds on x64 and ARM processors that provide AES instructions. It is designed to be truncatable to 256, 128, 64, and 32-bit hash values and still retain good collision resistance.

Q: What is it GOOD for?
A: Quickly hashing any amount of data for comparison purposes such as block deduplication or change detection. It is extremely fast on all buffer sizes, from one byte to one gigabyte and up.

Q: What is it BAD for?
A: Anything security-related. It should be assumed that it provides no protection from adversaries whatsoever. It is also not particularly fast on processors that don't support AES instructions (eg., non-x64/ARM processors).

Q: Why is it called the "Meow hash"?
A: It is named after a character in Meow the Infinite.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	MEOW_HASH_VERSION
static final String	MEOW_HASH_VERSION_NAME

Method Summary

Modifier and Type	Method	Description
static MeowHash	MeowHash_Accelerated(long Seed, ByteBuffer SourceInit, MeowHash __result)
static MeowHash	MeowHash_Accelerated(long Seed, DoubleBuffer SourceInit, MeowHash __result)
static MeowHash	MeowHash_Accelerated(long Seed, FloatBuffer SourceInit, MeowHash __result)
static MeowHash	MeowHash_Accelerated(long Seed, IntBuffer SourceInit, MeowHash __result)
static MeowHash	MeowHash_Accelerated(long Seed, LongBuffer SourceInit, MeowHash __result)
static MeowHash	MeowHash_Accelerated(long Seed, ShortBuffer SourceInit, MeowHash __result)
static MeowHash	MeowHash_Accelerated(long Seed, org.lwjgl.PointerBuffer SourceInit, MeowHash __result)
static void	MeowHashAbsorb(MeowHashState State, ByteBuffer SourceInit)
static void	MeowHashBegin(MeowHashState State)
static MeowHash	MeowHashEnd(MeowHashState State, long Seed, MeowHash __result)
static boolean	MeowHashesAreEqual(MeowHash A, MeowHash B)
static int	MeowU32From(MeowHash Hash)
static long	MeowU64From(MeowHash Hash)
static void	nMeowHash_Accelerated(long Seed, long TotalLengthInBytes, long SourceInit, long __result)
static void	nMeowHashAbsorb(long State, long Len, long SourceInit)
static void	nMeowHashBegin(long State)
static void	nMeowHashEnd(long State, long Seed, long __result)
static int	nMeowHashesAreEqual(long A, long B)
static int	nMeowU32From(long Hash)
static long	nMeowU64From(long Hash)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

MEOW_HASH_VERSION

public static final int MEOW_HASH_VERSION

See Also:

• Constant Field Values

MEOW_HASH_VERSION_NAME

public static final String MEOW_HASH_VERSION_NAME

See Also:

• Constant Field Values

Method Details

nMeowU64From

public static long nMeowU64From(long Hash)

MeowU64From

public static long MeowU64From(MeowHash Hash)

nMeowU32From

public static int nMeowU32From(long Hash)

MeowU32From

public static int MeowU32From(MeowHash Hash)

nMeowHashesAreEqual

public static int nMeowHashesAreEqual(long A,
 long B)

MeowHashesAreEqual

public static boolean MeowHashesAreEqual(MeowHash A,
 MeowHash B)

nMeowHash_Accelerated

public static void nMeowHash_Accelerated(long Seed,
 long TotalLengthInBytes,
 long SourceInit,
 long __result)

MeowHash_Accelerated

public static MeowHash MeowHash_Accelerated(long Seed,
 ByteBuffer SourceInit,
 MeowHash __result)

MeowHash_Accelerated

public static MeowHash MeowHash_Accelerated(long Seed,
 ShortBuffer SourceInit,
 MeowHash __result)

MeowHash_Accelerated

public static MeowHash MeowHash_Accelerated(long Seed,
 IntBuffer SourceInit,
 MeowHash __result)

MeowHash_Accelerated

public static MeowHash MeowHash_Accelerated(long Seed,
 LongBuffer SourceInit,
 MeowHash __result)

MeowHash_Accelerated

public static MeowHash MeowHash_Accelerated(long Seed,
 FloatBuffer SourceInit,
 MeowHash __result)

MeowHash_Accelerated

public static MeowHash MeowHash_Accelerated(long Seed,
 DoubleBuffer SourceInit,
 MeowHash __result)

MeowHash_Accelerated

public static MeowHash MeowHash_Accelerated(long Seed,
 org.lwjgl.PointerBuffer SourceInit,
 MeowHash __result)

nMeowHashBegin

public static void nMeowHashBegin(long State)

MeowHashBegin

public static void MeowHashBegin(MeowHashState State)

nMeowHashAbsorb

public static void nMeowHashAbsorb(long State,
 long Len,
 long SourceInit)

MeowHashAbsorb

public static void MeowHashAbsorb(MeowHashState State,
 ByteBuffer SourceInit)

nMeowHashEnd

public static void nMeowHashEnd(long State,
 long Seed,
 long __result)

MeowHashEnd

public static MeowHash MeowHashEnd(MeowHashState State,
 long Seed,
 MeowHash __result)