Package it.unimi.dsi.sux4j.mph.codec

Class Codec.Unary.Coder.Decoder

java.lang.Object

it.unimi.dsi.sux4j.mph.codec.Codec.Unary.Coder.Decoder

All Implemented Interfaces:

Codec.Decoder, Serializable

Enclosing class:

Codec.Unary.Coder

protected static final class Codec.Unary.Coder.Decoder
extends Object
implements Codec.Decoder

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
Decoder(int maxCodewordLength)

Method Summary

Modifier and Type	Method	Description
long	decode(long value)	Decodes a sequence of bits.
long	numBits()	The number of bits used by this decoder.

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unimi.dsi.sux4j.mph.codec.Codec.Decoder

escapedSymbolLength, escapeLength

Constructor Details

Decoder

public Decoder(int maxCodewordLength)

Method Details

decode

public long decode(long value)

Description copied from interface: Codec.Decoder

Decodes a sequence of bits.

If the first codeword appearing in the sequence is the escape codeword, this method returns −1 and the actual symbol must be retrieved by reading Codec.Decoder.escapedSymbolLength() further bits.

This method assumes that the first bit of the code is the leftmost bit (i.e., the bit of index Codec.Coder.maxCodewordLength() − 1).

Specified by:

decode in interface Codec.Decoder

Parameters:

value - a sequence of bits.

Returns:

the symbol associated with the first codeword appearing in the sequence, or −1 if the codeword is an escape.

numBits

public long numBits()

Description copied from interface: Codec.Decoder

The number of bits used by this decoder.

Specified by:

numBits in interface Codec.Decoder

Returns:

the number of bits used by this decoder.