com.plumtree.openfoundation.util
Class XPCRC

java.lang.Object
  com.plumtree.openfoundation.util.XPCRC

public class XPCRC

extends java.lang.Object

Implements equivalent CRC algorithms as found in C++ versions in IPTUtility_CRC.

Author:

MichaelY

Nested Class Summary

static class

XPCRC.XPCRCValue Simple CRC data class representing a 64-bit CRC value.

Constructor Summary

XPCRC()

Method Summary

static int	GenerateCRC32(java.lang.String inputString) Calculates the 32-bit CRC from a String.
static XPCRC.XPCRCValue	GenerateCRC64(java.lang.String inputString) Calculates the 64-bit CRC from a String.
static int	GenerateFileCRC32(java.lang.String filePath) Calculates the 32-bit CRC from a file-based binary stream.
static XPCRC.XPCRCValue	GenerateFileCRC64(java.lang.String filePath) Calculates the 64-bit CRC from a file-based binary stream.

Methods inherited from class java.lang.Object

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

Constructor Detail

XPCRC

public XPCRC()

Method Detail

GenerateFileCRC64

public static XPCRC.XPCRCValue GenerateFileCRC64(java.lang.String filePath)

Calculates the 64-bit CRC from a file-based binary stream. See GenerateCRC64 for more information.

Parameters:

filePath - a binary file stream.

Returns:

64-bit CRC value

GenerateFileCRC32

public static int GenerateFileCRC32(java.lang.String filePath)

Calculates the 32-bit CRC from a file-based binary stream.

Parameters:

filePath - a binary file stream.

Returns:

32-bit CRC value.

GenerateCRC64

public static XPCRC.XPCRCValue GenerateCRC64(java.lang.String inputString)

Calculates the 64-bit CRC from a String. This is simply two CRC32 values combined into a 64-bit value. The high 32-bit CRC is the CRC32 of the odd characters in the String. The low 32-bit CRC is the CRC32 of the even characters.

Parameters:

inputString - String value for which CRC is generated.

Returns:

64-bit CRC value

GenerateCRC32

public static int GenerateCRC32(java.lang.String inputString)

Calculates the 32-bit CRC from a String.

Parameters:

inputString - String input to be converted to CRC.

Returns:

32-bit CRC value