com.jpragma.snmp.util
Class BitManipulationHelper

java.lang.Object
  com.jpragma.snmp.util.BitManipulationHelper

public final class BitManipulationHelper
extends java.lang.Object

Utility class for bit and byte array manipulation.

Author:

Isaac Levin

Method Summary

static boolean	getBitValue(int value, int bitPosition) Returns bit value at specified position.
static byte[]	intToByteArray(int number) Converts int to byte array.
static byte[]	mergeArrays(byte[] buf1, byte[] buf2) Merges two byte arrays.
static byte[]	removeLeadingZeroBytes(byte[] buf) Removes leading bytes with 0 value.
static int	setBitValue(int value, int bitPosition, boolean bitValue) Sets bit at specified position.

Methods inherited from class java.lang.Object

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

Method Detail

getBitValue

public static boolean getBitValue(int value,
                                  int bitPosition)

Returns bit value at specified position.

Parameters:

value - original number

bitPosition - 1st bit is 1, last bit is 32

Returns:

true the the bit is turned on

setBitValue

public static int setBitValue(int value,
                              int bitPosition,
                              boolean bitValue)

Sets bit at specified position.

Parameters:

value - original number

bitPosition - bitPosition 1st bit is 1, last bit is 32

bitValue - true to turn the bit on

Returns:

new value

intToByteArray

public static byte[] intToByteArray(int number)

Converts int to byte array.

Parameters:

number - original number

Returns:

result array of bytes

removeLeadingZeroBytes

public static byte[] removeLeadingZeroBytes(byte[] buf)

Removes leading bytes with 0 value.

Parameters:

buf - original byte array

Returns:

Result byte array

mergeArrays

public static byte[] mergeArrays(byte[] buf1,
                                 byte[] buf2)

Merges two byte arrays.

Parameters:

buf1 - First byte array

buf2 - Second byte array

Returns:

Result byte array