it.unimi.dsi.compression

Interface PrefixCoder

All Superinterfaces:

Coder

All Known Implementing Classes:

CodeWordCoder, Fast64CodeWordCoder

public interface PrefixCoder
extends Coder

A coder based on a set of prefix-free codewords.

Not all coders are codeword-based (for instance, arithmetic coding is not codeword-based). However, coders that are based on prefix-free codewords are invited to return by means of Codec.coder() an implementation of this interface.

Note that the coder returned by a PrefixCodec is an implementation of this interface.

Method Summary

Modifier and Type	Method and Description
BitVector[]	codeWords() Provides access to the codewords.

Methods inherited from interface it.unimi.dsi.compression.Coder

encode, encode, flush, flush

Method Detail

codeWords

BitVector[] codeWords()

Provides access to the codewords. Warning: bit 0 of each bit vector returned by codeWords() is the first (leftmost) bit of the corresponding codeword: in other words, codewords are stored in right-to-left fashion.

Returns:

the codewords.