Class PureJavaCrc32C

java.lang.Object
org.xerial.snappy.PureJavaCrc32C
All Implemented Interfaces:
Checksum
public class PureJavaCrc32C extends Object implements Checksum
A pure-java implementation of the CRC32 checksum that uses the CRC32-C polynomial, the same polynomial used by iSCSI and implemented on many Intel chipsets supporting SSE4.2.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private int
    crc
    the current CRC value, bit-flipped
    (package private) static final int[]
    T8_0
     
    (package private) static final int[]
    T8_1
     
    (package private) static final int[]
    T8_2
     
    (package private) static final int[]
    T8_3
     
    (package private) static final int[]
    T8_4
     
    (package private) static final int[]
    T8_5
     
    (package private) static final int[]
    T8_6
     
    (package private) static final int[]
    T8_7
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    PureJavaCrc32C()
    Create a new PureJavaCrc32 object.

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    getIntegerValue()
     
    long
    getValue()
    void
    reset()
    void
    update(byte[] b, int off, int len)
    final void
    update(int b)

    Methods inherited from class Object

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

    Methods inherited from interface Checksum

    update, update

  • Field Details

    • crc

      private int crc
      the current CRC value, bit-flipped

    • T8_0

      static final int[] T8_0

    • T8_1

      static final int[] T8_1

    • T8_2

      static final int[] T8_2

    • T8_3

      static final int[] T8_3

    • T8_4

      static final int[] T8_4

    • T8_5

      static final int[] T8_5

    • T8_6

      static final int[] T8_6

    • T8_7

      static final int[] T8_7

  • Constructor Details

    • PureJavaCrc32C

      public PureJavaCrc32C()
      Create a new PureJavaCrc32 object.

  • Method Details

    • getIntegerValue

      public int getIntegerValue()

    • getValue

      public long getValue()
      Specified by:
      getValue in interface Checksum

    • reset

      public void reset()
      Specified by:
      reset in interface Checksum

    • update

      public void update(byte[] b, int off, int len)
      Specified by:
      update in interface Checksum

    • update

      public final void update(int b)
      Specified by:
      update in interface Checksum