Package dev.roanh.cpqindex

Class BitWriter

java.lang.Object

dev.roanh.cpqindex.BitWriter

public class BitWriter
extends Object

Utility class for writing a sequence of integers to an array while using a variable number of bits for each integer.

Field Summary

Fields

Modifier and Type	Field	Description
private byte[]	data	The data array being written to.
private int	pos	The current byte in the data array being written.
private int	sub	The next bit in the data array to write to.

Constructor Summary

Constructors

Constructor	Description
BitWriter(int bits)	Constructs a new BitWriter with enough space for at least the requested number of bits.

Method Summary

Modifier and Type	Method	Description
byte[]	getData()	Gets the array containing the written bits.
String	toBinaryString()	Constructs a string version of the bits written.
void	writeInt(int i, int bits)	Writes the bits of the given integer using exactly the given number of bits.

Methods inherited from class java.lang.Object

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

Field Details

data

private byte[] data

The data array being written to.

pos

private int pos

The current byte in the data array being written.

sub

private int sub

The next bit in the data array to write to.

Constructor Details

BitWriter

public BitWriter(int bits)

Constructs a new BitWriter with enough space for at least the requested number of bits.

Parameters:

bits - The minimum number of bits to allocate space for in the data array.

Method Details

writeInt

public void writeInt(int i,
 int bits)

Writes the bits of the given integer using exactly the given number of bits.

Parameters:

i - The integer to write.

bits - The number of bit to use to write the given integer.

getData

public byte[] getData()

Gets the array containing the written bits.

Returns:

The data array being written to.

toBinaryString

public String toBinaryString()

Constructs a string version of the bits written.

Returns:

A string with the written bits.