Class LZ4

LZ4 compression and decompression routines.

http://code.google.com/p/lz4/ http://fastcompression.blogspot.fr/p/lz4.html

Inheritance

object

LZ4

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Lucene.Net.Codecs.Compressing

Assembly: Lucene.Net.dll

Syntax

public static class LZ4

Methods

Compress(byte[], int, int, DataOutput, HashTable)

Compress bytes[off:off+len] into out using at most 16KB of memory. ht shouldn't be shared across threads but can safely be reused.

Declaration

public static void Compress(byte[] bytes, int off, int len, DataOutput @out, LZ4.HashTable ht)

Parameters

Type	Name	Description
byte[]	bytes
int	off
int	len
DataOutput	out
LZ4.HashTable	ht

CompressHC(byte[], int, int, DataOutput, HCHashTable)

Compress bytes[off:off+len] into out. Compared to Compress(byte[], int, int, DataOutput, HashTable), this method is slower and uses more memory (~ 256KB per thread) but should provide better compression ratios (especially on large inputs) because it chooses the best match among up to 256 candidates and then performs trade-offs to fix overlapping matches. ht shouldn't be shared across threads but can safely be reused.

Declaration

public static void CompressHC(byte[] src, int srcOff, int srcLen, DataOutput @out, LZ4.HCHashTable ht)

Parameters

Type	Name	Description
byte[]	src
int	srcOff
int	srcLen
DataOutput	out
LZ4.HCHashTable	ht

Decompress(DataInput, int, byte[], int)

Decompress at least decompressedLen bytes into dest[dOff]. Please note that dest must be large enough to be able to hold all decompressed data (meaning that you need to know the total decompressed length).

Declaration

public static int Decompress(DataInput compressed, int decompressedLen, byte[] dest, int dOff)

Parameters

Type	Name	Description
DataInput	compressed
int	decompressedLen
byte[]	dest
int	dOff

Returns

Type	Description
int