ariba.ui.aribaweb.core
Class AWChecksum

java.lang.Object
  ariba.ui.aribaweb.core.AWChecksum

public class AWChecksum
extends java.lang.Object

Constructor Summary

AWChecksum()

Method Summary

static long	checksumWithLength(char[] buf, int len)
static long	crc32(long crc, byte[] buf, int len)
static long	crc32(long crc, char[] buf, int len)
static long	crc32(long crc, int anInt)
static long	crc32(long crc, long otherCRC) Merge one CRC into another
static long	crc32(long crc, java.lang.String string)
static int	crc32Hash(char[] buf, int len) a simplified version of crc32 for char[] which ignore the most-significant byte as this is only used as a hashcode for an chars[] Only uses the last 30 values to keep it fast.
static int	crc32Hash(char[] buf, int startPos, int fullLength)
static long	crc32HashList(long crc, java.util.List list)
static long	crc32HashOrderedList(long crc, java.lang.Object list)
static long	crc32StringList(long crc, java.util.List list)

Methods inherited from class java.lang.Object

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

Constructor Detail

AWChecksum

public AWChecksum()

Method Detail

crc32

public static long crc32(long crc,
                         byte[] buf,
                         int len)

crc32

public static long crc32(long crc,
                         char[] buf,
                         int len)

crc32

public static long crc32(long crc,
                         int anInt)

crc32

public static long crc32(long crc,
                         long otherCRC)

Merge one CRC into another

checksumWithLength

public static long checksumWithLength(char[] buf,
                                      int len)

Parameters:

buf -

len - the length of the buf to use. Must be < 16-bit (65,535)

Returns:

a value which represents the len (16 most-significant bytes) and a 32-bit CRC value.

crc32Hash

public static int crc32Hash(char[] buf,
                            int len)

a simplified version of crc32 for char[] which ignore the most-significant byte as this is only used as a hashcode for an chars[] Only uses the last 30 values to keep it fast.

Parameters:

buf -

len -

Returns:

the crc

crc32Hash

public static int crc32Hash(char[] buf,
                            int startPos,
                            int fullLength)

crc32

public static long crc32(long crc,
                         java.lang.String string)

crc32StringList

public static long crc32StringList(long crc,
                                   java.util.List list)

crc32HashList

public static long crc32HashList(long crc,
                                 java.util.List list)

crc32HashOrderedList

public static long crc32HashOrderedList(long crc,
                                        java.lang.Object list)