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/*
* Copyright (c) 2007 innoSysTec (R) GmbH, Germany. All rights reserved.
* Original author: Edmund Wagner
* Creation date: 14.06.2007
*
* 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;
/**
* Simulates Pointers on a single mem block as a byte[]
*
* @author $LastChangedBy$
* @version $LastChangedRevision$
*/
public abstract class Pointer
{
protected byte[] mem;
protected int pos;
/**
* Initialize the object with the array (may be null)
* @param mem the byte array
*/
public Pointer(byte[] mem){
this.mem = mem;
}
/**
* returns the position of this object in the byte[]
* @return the address of this object
*/
public int getAddress(){
assert (mem != null);
return pos;
}
/**
* needs to set the fields of this object to the values in the byte[]
* at the given position.
* be aware of the byte order
* @param pos the position this object should point to
* @return true if the address could be set
*/
public void setAddress(int pos) {
assert (mem != null);
assert (pos >= 0) && (pos < mem.length) : pos;
this.pos = pos;
}
}
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