Module roaringbitmap

Package org.roaringbitmap.longlong

Class IntegerUtil

java.lang.Object

org.roaringbitmap.longlong.IntegerUtil

public class IntegerUtil
extends Object

Constructor Summary

Constructors

Constructor	Description
IntegerUtil()

Method Summary

Modifier and Type	Method	Description
static byte	firstByte(int v)	fetch the first byte
static int	fromBDBytes(byte[] bytes)	convert into its integer representation
static int	setByte(int v, byte bv, int pos)	set a specified position byte to another value to return a fresh integer
static int	shiftLeftFromSpecifiedPosition(int v, int pos, int count)	shift the byte left from the specified position
static byte[]	toBDBytes(int v)	convert integer to its byte array format

Methods inherited from class java.lang.Object

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

Constructor Details

IntegerUtil

public IntegerUtil()

Method Details

toBDBytes

public static byte[] toBDBytes(int v)

convert integer to its byte array format

Parameters:

v - an input integer value

Returns:

the big endian byte array representation

fromBDBytes

public static int fromBDBytes(byte[] bytes)

convert into its integer representation

Parameters:

bytes - the big endian integer's byte array

Returns:

a integer corresponding to input bytes

setByte

public static int setByte(int v,
 byte bv,
 int pos)

set a specified position byte to another value to return a fresh integer

Parameters:

v - the input integer value

bv - the byte value to insert

pos - the position of an 4 byte array to replace

Returns:

a fresh integer after a specified position byte been replaced

shiftLeftFromSpecifiedPosition

public static int shiftLeftFromSpecifiedPosition(int v,
 int pos,
 int count)

shift the byte left from the specified position

Parameters:

v - a integer value

pos - the position from which to shift byte values left

count - the shifting numbers

Returns:

a fresh integer value

firstByte

public static byte firstByte(int v)

fetch the first byte

Parameters:

v - an input integer

Returns:

the first byte of the big endian representation