com.twitter.common.collections

Class Bits

java.lang.Object

com.twitter.common.collections.Bits

public final class Bits
extends Object

Convenience class for doing bit-level operations on ints and longs.

Method Summary

Modifier and Type	Method and Description
static int	clearBit(int value, int bit) Clears a bit in an int value.
static long	clearBit(long value, int bit) Clears a bit in a long value.
static boolean	isBitSet(int value, int bit) Tests whether a bit is set in an int value.
static boolean	isBitSet(long value, int bit) Tests whether a bit is set in a long value.
static int	setBit(int value, int bit) Sets a bit in an int value.
static long	setBit(long value, int bit) Sets a bit in a long value.

Methods inherited from class java.lang.Object

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

Method Detail

isBitSet

public static boolean isBitSet(int value,
                               int bit)

Tests whether a bit is set in an int value.

Parameters:

value - The bit field to test.

bit - The index of the bit to test, where bit 0 is the LSB.

Returns:

true if the bit is set, false otherwise.

isBitSet

public static boolean isBitSet(long value,
                               int bit)

Tests whether a bit is set in a long value.

Parameters:

value - The bit field to test.

bit - The index of the bit to test, where bit 0 is the LSB.

Returns:

true if the bit is set, false otherwise.

setBit

public static int setBit(int value,
                         int bit)

Sets a bit in an int value.

Parameters:

value - The bit field to modify.

bit - The index of the bit to set, where bit 0 is the LSB.

Returns:

The original value, with the indexed bit set.

setBit

public static long setBit(long value,
                          int bit)

Sets a bit in a long value.

Parameters:

value - The bit field to modify.

bit - The index of the bit to set, where bit 0 is the LSB.

Returns:

The original value, with the indexed bit set.

clearBit

public static int clearBit(int value,
                           int bit)

Clears a bit in an int value.

Parameters:

value - The bit field to modify.

bit - The index of the bit to clear, where bit 0 is the LSB.

Returns:

The original value, with the indexed bit clear.

clearBit

public static long clearBit(long value,
                            int bit)

Clears a bit in a long value.

Parameters:

value - The bit field to modify.

bit - The index of the bit to clear, where bit 0 is the LSB.

Returns:

The original value, with the indexed bit clear.