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93 lines
3.3 KiB
C#
93 lines
3.3 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 Quasi88 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.IO;
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using System.Linq;
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using System.Text;
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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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public sealed partial class D88
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{
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#region IMediaImage 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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// Even if disk name is supposedly ASCII, I'm pretty sure most emulators allow Shift-JIS to be used :p
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var shiftjis = Encoding.GetEncoding("shift_jis");
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if(stream.Length < Marshal.SizeOf<Header>()) return false;
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var hdrB = new byte[Marshal.SizeOf<Header>()];
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stream.EnsureRead(hdrB, 0, hdrB.Length);
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Header hdr = Marshal.ByteArrayToStructureLittleEndian<Header>(hdrB);
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AaruLogging.Debug(MODULE_NAME, "d88hdr.name = \"{0}\"", StringHandlers.CToString(hdr.name, shiftjis));
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AaruLogging.Debug(MODULE_NAME, "d88hdr.reserved is empty? = {0}", hdr.reserved.SequenceEqual(_reservedEmpty));
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AaruLogging.Debug(MODULE_NAME, "d88hdr.write_protect = 0x{0:X2}", hdr.write_protect);
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AaruLogging.Debug(MODULE_NAME, "d88hdr.disk_type = {0} ({1})", hdr.disk_type, (byte)hdr.disk_type);
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AaruLogging.Debug(MODULE_NAME, "d88hdr.disk_size = {0}", hdr.disk_size);
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if(hdr.disk_size != stream.Length) return false;
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if(hdr.disk_type != DiskType.D2 && hdr.disk_type != DiskType.Dd2 && hdr.disk_type != DiskType.Hd2) return false;
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if(!hdr.reserved.SequenceEqual(_reservedEmpty)) return false;
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var counter = 0;
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foreach(int t in hdr.track_table)
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{
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if(t > 0) counter++;
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if(t < 0 || t > stream.Length) return false;
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}
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AaruLogging.Debug(MODULE_NAME, Localization._0_tracks, counter);
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return counter > 0;
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}
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#endregion
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} |