com.ning.compress.lzf.impl

Class UnsafeChunkEncoder

java.lang.Object

com.ning.compress.lzf.ChunkEncoder

com.ning.compress.lzf.impl.UnsafeChunkEncoder

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

UnsafeChunkEncoderBE, UnsafeChunkEncoderLE

public abstract class UnsafeChunkEncoder
extends ChunkEncoder

ChunkEncoder implementation that handles actual encoding of individual chunks, using Sun's sun.misc.Unsafe functionality, which gives nice extra boost for speed.

Author:

Tatu Saloranta (tatu.saloranta@iki.fi)

Field Summary

Fields

Modifier and Type	Field and Description
protected static long	BYTE_ARRAY_OFFSET
protected static long	BYTE_ARRAY_OFFSET_PLUS2
protected static sun.misc.Unsafe	unsafe

Fields inherited from class com.ning.compress.lzf.ChunkEncoder

_encodeBuffer, _hashModulo, _hashTable, _headerBuffer, _recycler, MAX_HASH_SIZE, MAX_OFF, MAX_REF, MIN_BLOCK_TO_COMPRESS, MIN_HASH_SIZE, TAIL_LENGTH

Constructor Summary

Constructors

Constructor and Description
UnsafeChunkEncoder(int totalLength)
UnsafeChunkEncoder(int totalLength, boolean bogus)
UnsafeChunkEncoder(int totalLength, BufferRecycler bufferRecycler)
UnsafeChunkEncoder(int totalLength, BufferRecycler bufferRecycler, boolean bogus)

Method Summary

Methods

Modifier and Type	Method and Description
protected static int	_copyFullLiterals(byte[] in, int inPos, byte[] out, int outPos)
protected static int	_copyLongLiterals(byte[] in, int inPos, byte[] out, int outPos, int literals)
protected static int	_copyPartialLiterals(byte[] in, int inPos, byte[] out, int outPos, int literals)
protected static int	_findTailMatchLength(byte[] in, int ptr1, int ptr2, int maxPtr1)
protected static int	_handleTail(byte[] in, int inPos, int inEnd, byte[] out, int outPos, int literals)

Methods inherited from class com.ning.compress.lzf.ChunkEncoder

appendEncodedChunk, appendEncodedIfCompresses, close, encodeAndWriteChunk, encodeAndWriteChunkIfCompresses, encodeChunk, encodeChunkIfCompresses, getBufferRecycler, hash, tryCompress

Methods inherited from class java.lang.Object

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

Field Detail

unsafe

protected static final sun.misc.Unsafe unsafe

BYTE_ARRAY_OFFSET

protected static final long BYTE_ARRAY_OFFSET

BYTE_ARRAY_OFFSET_PLUS2

protected static final long BYTE_ARRAY_OFFSET_PLUS2

Constructor Detail

UnsafeChunkEncoder

public UnsafeChunkEncoder(int totalLength)

UnsafeChunkEncoder

public UnsafeChunkEncoder(int totalLength,
                  boolean bogus)

UnsafeChunkEncoder

public UnsafeChunkEncoder(int totalLength,
                  BufferRecycler bufferRecycler)

UnsafeChunkEncoder

public UnsafeChunkEncoder(int totalLength,
                  BufferRecycler bufferRecycler,
                  boolean bogus)

Method Detail

_copyPartialLiterals

protected static final int _copyPartialLiterals(byte[] in,
                       int inPos,
                       byte[] out,
                       int outPos,
                       int literals)

_copyLongLiterals

protected static final int _copyLongLiterals(byte[] in,
                    int inPos,
                    byte[] out,
                    int outPos,
                    int literals)

_copyFullLiterals

protected static final int _copyFullLiterals(byte[] in,
                    int inPos,
                    byte[] out,
                    int outPos)

_handleTail

protected static final int _handleTail(byte[] in,
              int inPos,
              int inEnd,
              byte[] out,
              int outPos,
              int literals)

_findTailMatchLength

protected static final int _findTailMatchLength(byte[] in,
                       int ptr1,
                       int ptr2,
                       int maxPtr1)