StateRef.java

/*
 * Copyright (c) 2007 innoSysTec (R) GmbH, Germany. All rights reserved.
 * Original author: Edmund Wagner
 * Creation date: 01.06.2007
 *
 * Source: $HeadURL$
 * Last changed: $LastChangedDate$
 *
 * the unrar licence applies to all junrar source and binary distributions
 * you are not allowed to use this source to re-create the RAR compression algorithm
 *
 * Here some html entities which can be used for escaping javadoc tags:
 * "&":  "&" or "&"
 * "<":  "&#060;" or "&lt;"
 * ">":  "&#062;" or "&gt;"
 * "@":  "&#064;"
 */
package com.github.junrar.unpack.ppm;


/**
 * DOCUMENT ME
 *
 * @author $LastChangedBy$
 * @version $LastChangedRevision$
 */
public class StateRef {

    private int symbol;

    private int freq;

    private int successor; // pointer ppmcontext

    public StateRef() {
    }

    public int getSymbol() {
        return symbol;
    }

    public void setSymbol(int symbol) {
        this.symbol = symbol & 0xff;
    }

    public int getFreq() {
        return freq;
    }

    public void setFreq(int freq) {
        this.freq = freq & 0xff;
    }

    public void incFreq(int dFreq) {
        freq = (freq + dFreq) & 0xff;
    }

    public void decFreq(int dFreq) {
        freq = (freq - dFreq) & 0xff;
    }

    public void setValues(State statePtr) {
        setFreq(statePtr.getFreq());
        setSuccessor(statePtr.getSuccessor());
        setSymbol(statePtr.getSymbol());
    }

    public int getSuccessor() {
        return successor;
    }

    public void setSuccessor(PPMContext successor) {
        setSuccessor(successor.getAddress());
    }

    public void setSuccessor(int successor) {
        this.successor = successor;
    }

    public String toString() {
        StringBuilder buffer = new StringBuilder();
        buffer.append("State[");
        buffer.append("\n  symbol=");
        buffer.append(getSymbol());
        buffer.append("\n  freq=");
        buffer.append(getFreq());
        buffer.append("\n  successor=");
        buffer.append(getSuccessor());
        buffer.append("\n]");
        return buffer.toString();
    }
}