mirror of
https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 11:14:25 +00:00
84 lines
2.9 KiB
C#
84 lines
2.9 KiB
C#
// /***************************************************************************
|
|
// Aaru Data Preservation Suite
|
|
// ----------------------------------------------------------------------------
|
|
//
|
|
// Filename : Identify.cs
|
|
// Author(s) : Michael Drüing <michael@drueing.de>
|
|
//
|
|
// Component : Disk image plugins.
|
|
//
|
|
// --[ Description ] ----------------------------------------------------------
|
|
//
|
|
// Identifies d2f/WC DISK IMAGE 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 © 2018-2025 Michael Drüing
|
|
// Copyright © 2011-2025 Natalia Portillo
|
|
// ****************************************************************************/
|
|
|
|
using System.Diagnostics.CodeAnalysis;
|
|
using System.IO;
|
|
using System.Text;
|
|
using Aaru.CommonTypes.Interfaces;
|
|
using Aaru.Helpers;
|
|
|
|
namespace Aaru.Images;
|
|
|
|
[SuppressMessage("ReSharper", "UnusedType.Global")]
|
|
public sealed partial class WCDiskImage
|
|
{
|
|
#region IMediaImage Members
|
|
|
|
/// <inheritdoc />
|
|
public bool Identify(IFilter imageFilter)
|
|
{
|
|
Stream stream = imageFilter.GetDataForkStream();
|
|
stream.Seek(0, SeekOrigin.Begin);
|
|
|
|
if(stream.Length < 32) return false;
|
|
|
|
var header = new byte[32];
|
|
stream.EnsureRead(header, 0, 32);
|
|
|
|
FileHeader fheader = Marshal.ByteArrayToStructureLittleEndian<FileHeader>(header);
|
|
|
|
/* check the signature */
|
|
if(Encoding.ASCII.GetString(fheader.signature).TrimEnd('\x00') != FILE_SIGNATURE) return false;
|
|
|
|
/* Some sanity checks on the values we just read. */
|
|
if(fheader.version > 1) return false;
|
|
|
|
if(fheader.heads is < 1 or > 2) return false;
|
|
|
|
if(fheader.sectorsPerTrack is < 8 or > 18) return false;
|
|
|
|
if(fheader.cylinders is < 1 or > 80) return false;
|
|
|
|
if(fheader.extraTracks[0] > 1 ||
|
|
fheader.extraTracks[1] > 1 ||
|
|
fheader.extraTracks[2] > 1 ||
|
|
fheader.extraTracks[3] > 1)
|
|
return false;
|
|
|
|
// TODO: validate all sectors
|
|
// For now, having a valid header will suffice.
|
|
return ((byte)fheader.extraFlags & ~0x03) == 0;
|
|
}
|
|
|
|
#endregion
|
|
} |