Package io.grpc.xds

Class XxHash64

java.lang.Object

io.grpc.xds.XxHash64

final class XxHash64
extends Object

The XxHash is a fast, non-cryptographic, 64-bit hash function that has excellent avalanche and 2-way bit independence properties.

This implementation is a simplified version adapted from OpenHFT/Zero-Allocation-Hashing.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	XxHash64.AsciiStringByteSupplier
private static class	XxHash64.ByteSupplier
private static class	XxHash64.PlainByteSupplier

Field Summary

Fields

Modifier and Type	Field	Description
private static final ByteOrder	byteOrder
(package private) static final XxHash64	INSTANCE
private static final long	P1
private static final long	P2
private static final long	P3
private static final long	P4
private static final long	P5
private final long	seed
private final long	voidHash

Constructor Summary

Constructors

Constructor	Description
XxHash64(long seed)

Method Summary

Modifier and Type	Method	Description
private static long	finalize(long hash)
(package private) long	hashAsciiString(String input)
(package private) long	hashByte(byte input)
(package private) long	hashBytes(byte[] bytes)
(package private) long	hashBytes(byte[] bytes, int offset, int len)
private long	hashBytes(XxHash64.ByteSupplier supplier)
(package private) long	hashChar(char input)
(package private) long	hashInt(int input)
(package private) long	hashLong(long input)
(package private) long	hashShort(short input)
(package private) long	hashVoid()

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

static final XxHash64 INSTANCE

P1

private static final long P1

See Also:

• Constant Field Values

P2

private static final long P2

See Also:

• Constant Field Values

P3

private static final long P3

See Also:

• Constant Field Values

P4

private static final long P4

See Also:

• Constant Field Values

P5

private static final long P5

See Also:

• Constant Field Values

byteOrder

private static final ByteOrder byteOrder

seed

private final long seed

voidHash

private final long voidHash

Constructor Details

XxHash64

XxHash64(long seed)

Method Details

hashLong

long hashLong(long input)

hashInt

long hashInt(int input)

hashShort

long hashShort(short input)

hashChar

long hashChar(char input)

hashByte

long hashByte(byte input)

hashVoid

long hashVoid()

hashAsciiString

long hashAsciiString(String input)

hashBytes

long hashBytes(byte[] bytes)

hashBytes

long hashBytes(byte[] bytes,
 int offset,
 int len)

hashBytes

private long hashBytes(XxHash64.ByteSupplier supplier)

finalize

private static long finalize(long hash)