Package org.apache.datasketches.theta

Class BitPacking

java.lang.Object

org.apache.datasketches.theta.BitPacking

public class BitPacking
extends Object

Used as part of Theta compression.

Constructor Summary

Constructors

Constructor	Description
BitPacking()

Method Summary

Modifier and Type	Method	Description
static void	packBits(long value, int bits, byte[] buffer, int bufOffset, int bitOffset)	The bit packing operation
static void	unpackBits(long[] value, int index, int bits, byte[] buffer, int bufOffset, int bitOffset)	The unpacking operation

Methods inherited from class java.lang.Object

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

Constructor Detail

BitPacking

public BitPacking()

Method Detail

packBits

public static void packBits(long value,
                            int bits,
                            byte[] buffer,
                            int bufOffset,
                            int bitOffset)

The bit packing operation

Parameters:

value - the value to pack

bits - number of bits to pack

buffer - the output byte array buffer

bufOffset - the byte offset in the buffer

bitOffset - the bit offset

unpackBits

public static void unpackBits(long[] value,
                              int index,
                              int bits,
                              byte[] buffer,
                              int bufOffset,
                              int bitOffset)

The unpacking operation

Parameters:

value - the output array

index - index of the value array

bits - the number of bits to unpack

buffer - the input packed buffer

bufOffset - the buffer offset

bitOffset - the bit offset