Package org.iq80.snappy

Class SnappyCompressor

java.lang.Object
org.iq80.snappy.SnappyCompressor
final class SnappyCompressor extends Object

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private static final int
    BLOCK_LOG
     
    private static final int
    BLOCK_SIZE
     
    private static final int
    INPUT_MARGIN_BYTES
     
    private static final int
    MAX_HASH_TABLE_BITS
     
    private static final int
    MAX_HASH_TABLE_SIZE
     
    private static final boolean
    NATIVE_LITTLE_ENDIAN
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    SnappyCompressor()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    private static int
    bytesBetweenHashLookups(int skip)
     
    static int
    compress(byte[] uncompressed, int uncompressedOffset, int uncompressedLength, byte[] compressed, int compressedOffset)
     
    private static int
    compressFragment(byte[] input, int inputOffset, int inputSize, byte[] output, int outputIndex, short[] table)
     
    private static int[]
    emitCopies(byte[] input, int inputOffset, int inputSize, int ipIndex, byte[] output, int outputIndex, short[] table, int shift, int candidateIndex)
     
    private static int
    emitCopy(byte[] output, int outputIndex, int offset, int length)
     
    private static int
    emitCopyLessThan64(byte[] output, int outputIndex, int offset, int length)
     
    private static int
    emitLiteral(byte[] output, int outputIndex, byte[] literal, int literalIndex, int length, boolean allowFastPath)
     
    private static int[]
    findCandidate(byte[] input, int ipIndex, int ipLimit, int inputOffset, int shift, short[] table, int skip)
     
    private static int
    findMatchLength(byte[] s1, int s1Index, byte[] s2, int s2Index, int s2Limit)
     
    private static int
    getHashTableSize(int inputSize)
     
    private static int
    hashBytes(int bytes, int shift)
     
    private static int
    log2Floor(int n)
     
    static int
    maxCompressedLength(int sourceLength)
     
    private static int
    writeUncompressedLength(byte[] compressed, int compressedOffset, int uncompressedLength)
    Writes the uncompressed length as variable length integer.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • NATIVE_LITTLE_ENDIAN

      private static final boolean NATIVE_LITTLE_ENDIAN

    • BLOCK_LOG

      private static final int BLOCK_LOG
      See Also:

    • BLOCK_SIZE

      private static final int BLOCK_SIZE
      See Also:

    • INPUT_MARGIN_BYTES

      private static final int INPUT_MARGIN_BYTES
      See Also:

    • MAX_HASH_TABLE_BITS

      private static final int MAX_HASH_TABLE_BITS
      See Also:

    • MAX_HASH_TABLE_SIZE

      private static final int MAX_HASH_TABLE_SIZE
      See Also:

  • Constructor Details

    • SnappyCompressor

      SnappyCompressor()

  • Method Details

    • maxCompressedLength

      public static int maxCompressedLength(int sourceLength)

    • compress

      public static int compress(byte[] uncompressed, int uncompressedOffset, int uncompressedLength, byte[] compressed, int compressedOffset)

    • compressFragment

      private static int compressFragment(byte[] input, int inputOffset, int inputSize, byte[] output, int outputIndex, short[] table)

    • findCandidate

      private static int[] findCandidate(byte[] input, int ipIndex, int ipLimit, int inputOffset, int shift, short[] table, int skip)

    • bytesBetweenHashLookups

      private static int bytesBetweenHashLookups(int skip)

    • emitCopies

      private static int[] emitCopies(byte[] input, int inputOffset, int inputSize, int ipIndex, byte[] output, int outputIndex, short[] table, int shift, int candidateIndex)

    • emitLiteral

      private static int emitLiteral(byte[] output, int outputIndex, byte[] literal, int literalIndex, int length, boolean allowFastPath)

    • emitCopyLessThan64

      private static int emitCopyLessThan64(byte[] output, int outputIndex, int offset, int length)

    • emitCopy

      private static int emitCopy(byte[] output, int outputIndex, int offset, int length)

    • findMatchLength

      private static int findMatchLength(byte[] s1, int s1Index, byte[] s2, int s2Index, int s2Limit)

    • getHashTableSize

      private static int getHashTableSize(int inputSize)

    • hashBytes

      private static int hashBytes(int bytes, int shift)

    • log2Floor

      private static int log2Floor(int n)

    • writeUncompressedLength

      private static int writeUncompressedLength(byte[] compressed, int compressedOffset, int uncompressedLength)
      Writes the uncompressed length as variable length integer.