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72 lines
2.4 KiB
C#
72 lines
2.4 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Identify.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Disk image plugins.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies T98 disk images.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Diagnostics.CodeAnalysis;
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using System.IO;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.Helpers;
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using Aaru.Logging;
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namespace Aaru.Images;
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[SuppressMessage("ReSharper", "UnusedType.Global")]
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public sealed partial class T98
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{
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#region IWritableImage Members
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/// <inheritdoc />
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public bool Identify(IFilter imageFilter)
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{
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Stream stream = imageFilter.GetDataForkStream();
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stream.Seek(0, SeekOrigin.Begin);
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if(stream.Length % 256 != 0) return false;
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var hdrB = new byte[256];
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stream.EnsureRead(hdrB, 0, hdrB.Length);
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for(var i = 4; i < 256; i++)
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if(hdrB[i] != 0)
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return false;
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var cylinders = BitConverter.ToInt32(hdrB, 0);
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AaruLogging.Debug(MODULE_NAME, Localization.cylinders_equal_0, cylinders);
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// This format is expanding, so length can be smaller
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// Just grow it, I won't risk false positives...
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return stream.Length == cylinders * 8 * 33 * 256 + 256;
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}
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#endregion
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} |