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91 lines
3.3 KiB
C#
91 lines
3.3 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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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 raw image, that is, user data sector by sector copy.
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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 © 2011-2018 Natalia Portillo
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// ****************************************************************************/
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using System.IO;
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using System.Linq;
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using DiscImageChef.CommonTypes.Interfaces;
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namespace DiscImageChef.DiscImages
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{
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public partial class ZZZRawImage
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{
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public bool Identify(IFilter imageFilter)
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{
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// Check if file is not multiple of 512
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if(imageFilter.GetDataForkLength() % 512 == 0) return true;
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extension = Path.GetExtension(imageFilter.GetFilename())?.ToLower();
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if(extension == ".hdf" && imageFilter.GetDataForkLength() % 256 == 0) return true;
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// Only for single track data CDs
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if(imageFilter.GetDataForkLength() % 2352 == 0 && imageFilter.GetDataForkLength() <= 846720000 ||
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imageFilter.GetDataForkLength() % 2448 == 0 && imageFilter.GetDataForkLength() <= 881280000)
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{
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byte[] sync = new byte[12];
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Stream stream = imageFilter.GetDataForkStream();
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stream.Position = 0;
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stream.Read(sync, 0, 12);
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return cdSync.SequenceEqual(sync);
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}
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// Check known disk sizes with sectors smaller than 512
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switch(imageFilter.GetDataForkLength())
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{
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#region Commodore
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case 174848:
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case 175531:
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case 197376:
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case 351062:
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case 822400:
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#endregion Commodore
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case 81664:
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case 116480:
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case 242944:
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case 256256:
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case 287488:
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case 306432:
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case 495872:
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case 988416:
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case 995072:
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case 1021696:
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case 1146624:
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case 1177344:
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case 1222400:
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case 1304320:
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case 1255168: return true;
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default: return false;
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}
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}
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}
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} |