Package com.ning.compress.lzf.impl

Class UnsafeChunkEncoder

java.lang.Object

com.ning.compress.lzf.ChunkEncoder

com.ning.compress.lzf.impl.UnsafeChunkEncoder

All Implemented Interfaces:

java.io.Closeable, java.lang.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.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static long	BYTE_ARRAY_OFFSET
(package private) 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	Description
UnsafeChunkEncoder(int totalLength)
UnsafeChunkEncoder(int totalLength, boolean bogus)
UnsafeChunkEncoder(int totalLength, BufferRecycler bufferRecycler)
UnsafeChunkEncoder(int totalLength, BufferRecycler bufferRecycler, boolean bogus)

Method Summary

Modifier and Type	Method	Description
(package private) static void	_checkArrayIndices(byte[] array, int start, int end)
(package private) static void	_checkOutputLength(int inputLen, int outputLen)
(package private) static int	_copyFullLiterals(byte[] in, int inPos, byte[] out, int outPos)
(package private) static int	_copyLongLiterals(byte[] in, int inPos, byte[] out, int outPos, int literals)
(package private) static int	_copyPartialLiterals(byte[] in, int inPos, byte[] out, int outPos, int literals)
(package private) static int	_findTailMatchLength(byte[] in, int ptr1, int ptr2, int maxPtr1)
(package private) 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

static final sun.misc.Unsafe unsafe

BYTE_ARRAY_OFFSET

static final long BYTE_ARRAY_OFFSET

Constructor Detail

UnsafeChunkEncoder

UnsafeChunkEncoder(int totalLength)

UnsafeChunkEncoder

UnsafeChunkEncoder(int totalLength,
                   boolean bogus)

UnsafeChunkEncoder

UnsafeChunkEncoder(int totalLength,
                   BufferRecycler bufferRecycler)

UnsafeChunkEncoder

UnsafeChunkEncoder(int totalLength,
                   BufferRecycler bufferRecycler,
                   boolean bogus)

Method Detail

_checkArrayIndices

static void _checkArrayIndices(byte[] array,
                               int start,
                               int end)

Parameters:

start - start index, inclusive

end - end index, exclusive

_checkOutputLength

static void _checkOutputLength(int inputLen,
                               int outputLen)

_copyPartialLiterals

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

_copyLongLiterals

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

_copyFullLiterals

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

_handleTail

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

_findTailMatchLength

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