ISCSIConsole-Fork/DiskAccessLibrary/BaseClasses/Volume.cs

/* Copyright (C) 2014-2018 Tal Aloni <tal.aloni.il@gmail.com>. All rights reserved.
 * 
 * You can redistribute this program and/or modify it under the terms of
 * the GNU Lesser Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 */
using System;
using System.Collections.Generic;

public abstract class Volume
{
    /// <summary>
    /// Sector refers to physical disk sector, we can only read complete sectors
    /// </summary>
    public abstract byte[] ReadSectors(long sectorIndex, int sectorCount);
    public abstract void WriteSectors(long sectorIndex, byte[] data);
    
    public byte[] ReadSector(long sectorIndex)
    {
        return ReadSectors(sectorIndex, 1);
    }

    public void CheckBoundaries(long sectorIndex, int sectorCount)
    {
        if (sectorIndex < 0 || sectorIndex + sectorCount - 1 >= this.TotalSectors)
        {
            throw new ArgumentOutOfRangeException("Attempted to access data outside of volume");
        }
    }

    public abstract int BytesPerSector
    {
        get;
    }

    public abstract long Size
    {
        get;
    }

    public virtual bool IsReadOnly
    {
        get
        {
            return false;
        }
    }

    public abstract List<DiskExtent> Extents
    {
        get;
    }

    public long TotalSectors
    {
        get
        {
            return this.Size / this.BytesPerSector;
        }
    }
}