Aaru/Aaru.Images/VHDX/VHDX.cs

// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : VHDX.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
//     Manages Microsoft Hyper-V disk images.
//
// --[ License ] --------------------------------------------------------------
//
//     This library is free software; you can redistribute it and/or modify
//     it under the terms of the GNU Lesser General Public License as
//     published by the Free Software Foundation; either version 2.1 of the
//     License, or (at your option) any later version.
//
//     This library 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
//     Lesser General Public License for more details.
//
//     You should have received a copy of the GNU Lesser General Public
//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2025 Natalia Portillo
// ****************************************************************************/

// ReSharper disable NotAccessedField.Local

using System;
using System.Collections.Generic;
using System.IO;
using Aaru.CommonTypes.Interfaces;
using Aaru.CommonTypes.Structs;

namespace Aaru.Images;

/// <inheritdoc />
/// <summary>Implements reading Hyper-V disk images</summary>
public sealed partial class Vhdx : IMediaImage
{
    const string              MODULE_NAME = "VHDX plugin";
    long                      _batOffset;
    ulong[]                   _blockAllocationTable;
    Dictionary<ulong, byte[]> _blockCache;
    long                      _chunkRatio;
    ulong                     _dataBlocks;
    bool                      _hasParent;
    Identifier                _id;
    ImageInfo                 _imageInfo;
    Stream                    _imageStream;
    uint                      _logicalSectorSize;
    int                       _maxBlockCache;
    int                       _maxSectorCache;
    long                      _metadataOffset;
    Guid                      _page83Data;
    IMediaImage               _parentImage;
    uint                      _physicalSectorSize;
    byte[]                    _sectorBitmap;
    ulong[]                   _sectorBitmapPointers;
    Dictionary<ulong, byte[]> _sectorCache;
    FileParameters            _vFileParms;
    Header                    _vHdr;
    ulong                     _virtualDiskSize;
    MetadataTableHeader       _vMetHdr;
    MetadataTableEntry[]      _vMets;
    ParentLocatorHeader       _vParHdr;
    ParentLocatorEntry[]      _vPars;
    RegionTableHeader         _vRegHdr;
    RegionTableEntry[]        _vRegs;

    public Vhdx() => _imageInfo = new ImageInfo
    {
        ReadableSectorTags    = [],
        ReadableMediaTags     = [],
        HasPartitions         = false,
        HasSessions           = false,
        Version               = null,
        Application           = null,
        ApplicationVersion    = null,
        Creator               = null,
        Comments              = null,
        MediaManufacturer     = null,
        MediaModel            = null,
        MediaSerialNumber     = null,
        MediaBarcode          = null,
        MediaPartNumber       = null,
        MediaSequence         = 0,
        LastMediaSequence     = 0,
        DriveManufacturer     = null,
        DriveModel            = null,
        DriveSerialNumber     = null,
        DriveFirmwareRevision = null
    };
}