simplebytearray.java

JPC: x86 PC Hardware Emulator. 牛津大学开发的一个纯JAVA的x86系统结构硬件模拟器。

/*
    JPC: A x86 PC Hardware Emulator for a pure Java Virtual Machine
    Release Version 2.0

    A project from the Physics Dept, The University of Oxford

    Copyright (C) 2007 Isis Innovation Limited

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License version 2 as published by
    the Free Software Foundation.

    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, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
    Details (including contact information) can be found at: 

    www.physics.ox.ac.uk/jpc
*/

package org.jpc.emulator.memory;

import java.util.*;

public class SimpleByteArray implements ByteArray
{
    protected byte[] array;

    public SimpleByteArray(int size)
    {
        this(new byte[size]);
    }

    public SimpleByteArray(byte[] array)
    {
        if (array == null)
            this.array = new byte[0];
	else
	    this.array = array;
    }

    public void clear()
    {
	for (int i = 0; i < array.length; i++)
	    array[i] = (byte)0;
    }

    public long getSize()
    {
        return array.length;
    }

    public byte getByte(int offset)
    {
        return array[offset];
    }

    public void setByte(int offset, byte data)
    {
        array[offset] = data;
    }

    public void copyContentsInto(int address, byte[] buf, int off, int len)
    {
        System.arraycopy(array, address, buf, off, len);
    }
}