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WebGraph is a framework to study the web graph. It provides simple ways to manage very large graph, exploiting modern compression techniques.

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package it.unimi.dsi.webgraph;

/*
 * Copyright (C) 2006-2017 Paolo Boldi and Sebastiano Vigna
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the Free
 *  Software Foundation; either version 3 of the License, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 *  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, see .
 *
 */


/** This interface provides constants to be used as compression flags. */


public interface CompressionFlags {

	/** δ coding (see {@link it.unimi.dsi.io.OutputBitStream#writeDelta(int)}). */
	public static final int DELTA = 1;

	/** γ coding (see {@link it.unimi.dsi.io.OutputBitStream#writeGamma(int)}). */
	public static final int GAMMA = 2;

	/** Golomb coding (see {@link it.unimi.dsi.io.OutputBitStream#writeGolomb(int,int)}). */
	public static final int GOLOMB = 3;

	/** Skewed Golomb coding (see {@link it.unimi.dsi.io.OutputBitStream#writeSkewedGolomb(int,int)}). */
	public static final int SKEWED_GOLOMB = 4;

	/** Unary coding (see {@link it.unimi.dsi.io.OutputBitStream#writeUnary(int)}). */
	public static final int UNARY = 5;

	/** ζ_k coding (see {@link it.unimi.dsi.io.OutputBitStream#writeZeta(int,int)}). */
	public static final int ZETA = 6;

	/** Variable-length nibble coding (see {@link it.unimi.dsi.io.OutputBitStream#writeNibble(int)}). */
	public static final int NIBBLE = 7;

	public static final String[] CODING_NAME = { "DEFAULT", "DELTA", "GAMMA", "GOLOMB", "SKEWED_GOLOMB", "UNARY", "ZETA", "NIBBLE" };

}