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93 lines
4.0 KiB
C#
93 lines
4.0 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Structs.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : RT-11 file system plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies the RT-11 file system and shows information.
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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.Runtime.InteropServices;
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namespace Aaru.Filesystems;
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// Information from http://www.trailing-edge.com/~shoppa/rt11fs/
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/// <inheritdoc />
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/// <summary>Implements detection of the DEC RT-11 filesystem</summary>
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public sealed partial class RT11
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{
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#region Nested type: HomeBlock
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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readonly struct HomeBlock
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{
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/// <summary>Bad block replacement table</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 130)]
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public readonly byte[] badBlockTable;
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/// <summary>Unused</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
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public readonly byte[] unused;
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/// <summary>INITIALIZE/RESTORE data area</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 38)]
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public readonly byte[] initArea;
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/// <summary>BUP information area</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 18)]
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public readonly byte[] bupInformation;
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/// <summary>Empty</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 260)]
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public readonly byte[] empty;
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/// <summary>Reserved</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
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public readonly byte[] reserved1;
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/// <summary>Reserved</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
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public readonly byte[] reserved2;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 14)]
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public readonly byte[] empty2;
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/// <summary>Cluster size</summary>
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public readonly ushort cluster;
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/// <summary>Block of the first directory segment</summary>
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public readonly ushort rootBlock;
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/// <summary>"V3A" in Radix-50</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
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public readonly byte[] systemVersion;
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/// <summary>Name of the volume, 12 bytes</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
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public readonly byte[] volname;
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/// <summary>Name of the volume owner, 12 bytes</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
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public readonly byte[] ownername;
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/// <summary>RT11 defines it as "DECRT11A ", 12 bytes</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
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public readonly byte[] format;
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/// <summary>Unused</summary>
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public readonly ushort unused2;
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/// <summary>Checksum of preceding 255 words (16 bit units)</summary>
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public readonly ushort checksum;
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}
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#endregion
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} |