java.lang.Object
- com.tdunning.math.stats.Simple64

public class Simple64
extends java.lang.Object

Very simple variable byte encoding that always uses 64bit units. The idea is that the next few values are smashed into 64 bits using a few bits to indicate how they are fitted in and the rest of the bits to fit each value into equal-sized chunks. In this encoding, 4 bits are used to indicate how the remaining 60 bits are divided. The possible ways are shown in the following table:

Code	Arrangement
14	1 X 60BITS
13	2 X 30BITS
12	3 X 20BITS
11	4 X 15BITS
10	5 X 12BITS
9	6 X 10BITS
8	7 X 8BITS
7	8 X 7BITS
6	10 X 6BITS
5	12 X 5BITS
4	15 X 4BITS
3	20 X 3BITS
2	30 X 2BITS
1	60 X 1BITS

Field Summary

Fields
Modifier and Type	Field	Description
`private static int`	`BITS_1_MASK`
`private static int`	`BITS_10_MASK`
`private static int`	`BITS_11_MASK`
`private static int`	`BITS_12_MASK`
`private static int`	`BITS_15_MASK`
`private static int`	`BITS_2_MASK`
`private static int`	`BITS_20_MASK`
`private static int`	`BITS_3_MASK`
`private static int`	`BITS_30_MASK`
`private static int`	`BITS_4_MASK`
`private static int`	`BITS_5_MASK`
`private static int`	`BITS_6_MASK`
`private static int`	`BITS_7_MASK`
`private static int`	`BITS_8_MASK`
`private int`	`inputCompressable`
`private int`	`inputCount`
`private long`	`maxFitPlus1`
`private int`	`minBits`
`private static int`	`NUM_DATA_BITS`
`private long[]`	`pending`
`private static int`	`STATUS_10NUM_6BITS`
`private static int`	`STATUS_12NUM_5BITS`
`private static int`	`STATUS_15NUM_4BITS`
`private static int`	`STATUS_1NUM_60BITS`
`private static int`	`STATUS_20NUM_3BITS`
`private static int`	`STATUS_2NUM_30BITS`
`private static int`	`STATUS_30NUM_2BITS`
`private static int`	`STATUS_3NUM_20BITS`
`private static int`	`STATUS_4NUM_15BITS`
`private static int`	`STATUS_5NUM_12BITS`
`private static int`	`STATUS_60NUM_1BITS`
`private static int`	`STATUS_6NUM_10BITS`
`private static int`	`STATUS_7NUM_8BITS`
`private static int`	`STATUS_8NUM_7BITS`

Constructor Summary

Constructors
Constructor Description

Simple64()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`add(long v, long[] out)`
`static void`	`compress(java.nio.LongBuffer compressedBuffer, long[] unCompressedData, int offset, int size)`
`private static int`	`compressSingle(long[] uncompressed, int inOffset, int inSize, java.nio.LongBuffer compressedBuffer)`
`static int`	`decompress(java.nio.LongBuffer compressedBuffer, long[] unCompressedData)`
`private static int`	`decompressSingle(long s9, long[] decompressed, int outOffset)`
`private void`	`reset()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- NUM_DATA_BITS
```
private static final int NUM_DATA_BITS
```
  See Also:
  
  Constant Field Values
- BITS_30_MASK
```
private static final int BITS_30_MASK
```
  See Also:
  
  Constant Field Values
- BITS_20_MASK
```
private static final int BITS_20_MASK
```
  See Also:
  
  Constant Field Values
- BITS_15_MASK
```
private static final int BITS_15_MASK
```
  See Also:
  
  Constant Field Values
- BITS_12_MASK
```
private static final int BITS_12_MASK
```
  See Also:
  
  Constant Field Values
- BITS_11_MASK
```
private static final int BITS_11_MASK
```
  See Also:
  
  Constant Field Values
- BITS_10_MASK
```
private static final int BITS_10_MASK
```
  See Also:
  
  Constant Field Values
- BITS_8_MASK
```
private static final int BITS_8_MASK
```
  See Also:
  
  Constant Field Values
- BITS_7_MASK
```
private static final int BITS_7_MASK
```
  See Also:
  
  Constant Field Values
- BITS_6_MASK
```
private static final int BITS_6_MASK
```
  See Also:
  
  Constant Field Values
- BITS_5_MASK
```
private static final int BITS_5_MASK
```
  See Also:
  
  Constant Field Values
- BITS_4_MASK
```
private static final int BITS_4_MASK
```
  See Also:
  
  Constant Field Values
- BITS_3_MASK
```
private static final int BITS_3_MASK
```
  See Also:
  
  Constant Field Values
- BITS_2_MASK
```
private static final int BITS_2_MASK
```
  See Also:
  
  Constant Field Values
- BITS_1_MASK
```
private static final int BITS_1_MASK
```
  See Also:
  
  Constant Field Values
- STATUS_1NUM_60BITS
```
private static final int STATUS_1NUM_60BITS
```
  See Also:
  
  Constant Field Values
- STATUS_2NUM_30BITS
```
private static final int STATUS_2NUM_30BITS
```
  See Also:
  
  Constant Field Values
- STATUS_3NUM_20BITS
```
private static final int STATUS_3NUM_20BITS
```
  See Also:
  
  Constant Field Values
- STATUS_4NUM_15BITS
```
private static final int STATUS_4NUM_15BITS
```
  See Also:
  
  Constant Field Values
- STATUS_5NUM_12BITS
```
private static final int STATUS_5NUM_12BITS
```
  See Also:
  
  Constant Field Values
- STATUS_6NUM_10BITS
```
private static final int STATUS_6NUM_10BITS
```
  See Also:
  
  Constant Field Values
- STATUS_7NUM_8BITS
```
private static final int STATUS_7NUM_8BITS
```
  See Also:
  
  Constant Field Values
- STATUS_8NUM_7BITS
```
private static final int STATUS_8NUM_7BITS
```
  See Also:
  
  Constant Field Values
- STATUS_10NUM_6BITS
```
private static final int STATUS_10NUM_6BITS
```
  See Also:
  
  Constant Field Values
- STATUS_12NUM_5BITS
```
private static final int STATUS_12NUM_5BITS
```
  See Also:
  
  Constant Field Values
- STATUS_15NUM_4BITS
```
private static final int STATUS_15NUM_4BITS
```
  See Also:
  
  Constant Field Values
- STATUS_20NUM_3BITS
```
private static final int STATUS_20NUM_3BITS
```
  See Also:
  
  Constant Field Values
- STATUS_30NUM_2BITS
```
private static final int STATUS_30NUM_2BITS
```
  See Also:
  
  Constant Field Values
- STATUS_60NUM_1BITS
```
private static final int STATUS_60NUM_1BITS
```
  See Also:
  
  Constant Field Values
- inputCompressable
```
private int inputCompressable
```
- minBits
```
private int minBits
```
- maxFitPlus1
```
private long maxFitPlus1
```
- pending
```
private final long[] pending
```
- inputCount
```
private int inputCount
```

Constructor Detail
- Simple64
```
public Simple64()
```

Method Detail

reset
```
private void reset()
```

add

public int add(long v,
               long[] out)

compressSingle

private static int compressSingle(long[] uncompressed,
                                  int inOffset,
                                  int inSize,
                                  java.nio.LongBuffer compressedBuffer)

decompressSingle

private static int decompressSingle(long s9,
                                    long[] decompressed,
                                    int outOffset)

compress

public static void compress(java.nio.LongBuffer compressedBuffer,
                            long[] unCompressedData,
                            int offset,
                            int size)

decompress

public static int decompress(java.nio.LongBuffer compressedBuffer,
                             long[] unCompressedData)

Class Simple64

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

NUM_DATA_BITS

BITS_30_MASK

BITS_20_MASK

BITS_15_MASK

BITS_12_MASK

BITS_11_MASK

BITS_10_MASK

BITS_8_MASK

BITS_7_MASK

BITS_6_MASK

BITS_5_MASK

BITS_4_MASK

BITS_3_MASK

BITS_2_MASK

BITS_1_MASK

STATUS_1NUM_60BITS

STATUS_2NUM_30BITS

STATUS_3NUM_20BITS

STATUS_4NUM_15BITS

STATUS_5NUM_12BITS

STATUS_6NUM_10BITS

STATUS_7NUM_8BITS

STATUS_8NUM_7BITS

STATUS_10NUM_6BITS

STATUS_12NUM_5BITS

STATUS_15NUM_4BITS

STATUS_20NUM_3BITS

STATUS_30NUM_2BITS

STATUS_60NUM_1BITS

inputCompressable

minBits

maxFitPlus1

pending

inputCount

Constructor Detail

Simple64

Method Detail

reset

add

compressSingle

decompressSingle

compress

decompress