Package it.unimi.dsi.law.util

Class CRC64

java.lang.Object

it.unimi.dsi.law.util.CRC64

public class CRC64
extends Object

Provides static methods to compute 64-bit CRCs of strings and byte arrays. It uses the primitive polynomial x⁶⁴+x⁴+x³+x+1.

Method Summary

Modifier and Type	Method	Description
static long	compute(byte[] x)	Computes the 64 bit CRC of a byte array.
static long	compute(char[] x, int off, int len)	Computes the 64 bit CRC of a character array fragment.
static long	compute(MutableString s)	Computes the 64 bit CRC of a mutable string, using the ISO8859-1 representation of its Unicode characters.
static long	compute(String s)	Computes the 64 bit CRC of a string, using the ISO8859-1 representation of its Unicode characters.

Methods inherited from class java.lang.Object

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

Method Details

compute

public static long compute(byte[] x)

Computes the 64 bit CRC of a byte array.

Parameters:

x - the byte array to CRC.

Returns:

the CRC.

compute

public static long compute(char[] x,
int off,
int len)

Computes the 64 bit CRC of a character array fragment.

Parameters:

x - the array to CRC.

off - the offset inside x.

len - the number of characters to CRC.

Returns:

the CRC.

compute

public static long compute(String s)

Computes the 64 bit CRC of a string, using the ISO8859-1 representation of its Unicode characters.

Parameters:

s - the byte array to CRC.

Returns:

the CRC.

compute

public static long compute(MutableString s)

Computes the 64 bit CRC of a mutable string, using the ISO8859-1 representation of its Unicode characters.

Parameters:

s - the mutable string to CRC.

Returns:

the CRC.