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/*
* Copyright (c) 2007 innoSysTec (R) GmbH, Germany. All rights reserved.
* Original author: Edmund Wagner
* Creation date: 05.06.2007
*
* 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 "&"
* "<": "<" or "<"
* ">": ">" or ">"
* "@": "@"
*/
package com.github.junrar.unpack.ppm;
import com.github.junrar.io.Raw;
/**
* DOCUMENT ME
*
* @author $LastChangedBy$
* @version $LastChangedRevision$
*/
public class RarMemBlock extends Pointer
{
public static final int size = 12;
private int stamp, NU;
private int next, prev; // Pointer RarMemBlock
public RarMemBlock(byte[] mem)
{
super(mem);
}
public void insertAt(RarMemBlock p)
{
RarMemBlock temp = new RarMemBlock(mem);
setPrev(p.getAddress());
temp.setAddress(getPrev());
setNext(temp.getNext());// prev.getNext();
temp.setNext(this);// prev.setNext(this);
temp.setAddress(getNext());
temp.setPrev(this);// next.setPrev(this);
}
public void remove()
{
RarMemBlock temp = new RarMemBlock(mem);
temp.setAddress(getPrev());
temp.setNext(getNext());// prev.setNext(next);
temp.setAddress(getNext());
temp.setPrev(getPrev());// next.setPrev(prev);
// next = -1;
// prev = -1;
}
public int getNext()
{
if(mem!=null){
next = Raw.readIntLittleEndian(mem, pos+4);
}
return next;
}
public void setNext(RarMemBlock next)
{
setNext(next.getAddress());
}
public void setNext(int next)
{
this.next = next;
if (mem != null) {
Raw.writeIntLittleEndian(mem, pos + 4, next);
}
}
public int getNU()
{
if(mem!=null){
NU = Raw.readShortLittleEndian(mem, pos+2)&0xffff;
}
return NU;
}
public void setNU(int nu)
{
NU = nu&0xffff;
if (mem != null) {
Raw.writeShortLittleEndian(mem, pos + 2, (short)nu);
}
}
public int getPrev()
{
if(mem!=null){
prev = Raw.readIntLittleEndian(mem, pos+8);
}
return prev;
}
public void setPrev(RarMemBlock prev)
{
setPrev(prev.getAddress());
}
public void setPrev(int prev)
{
this.prev = prev;
if (mem != null) {
Raw.writeIntLittleEndian(mem, pos + 8, prev);
}
}
public int getStamp()
{
if(mem!=null){
stamp = Raw.readShortLittleEndian(mem, pos)&0xffff;
}
return stamp;
}
public void setStamp(int stamp)
{
this.stamp = stamp;
if (mem != null) {
Raw.writeShortLittleEndian(mem, pos, (short)stamp);
}
}
}
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