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125 lines
4.2 KiB
C#
125 lines
4.2 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : RioKarma.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Partitioning scheme plugins.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Manages Rio Karma partitions.
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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.Collections.Generic;
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using System.Linq;
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using System.Runtime.InteropServices;
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using Aaru.CommonTypes;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Interfaces;
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using Marshal = Aaru.Helpers.Marshal;
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namespace Aaru.Partitions;
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/// <inheritdoc />
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/// <summary>Implements decoding of Rio Karma partitions</summary>
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public sealed class RioKarma : IPartition
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{
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const ushort KARMA_MAGIC = 0xAB56;
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const byte ENTRY_MAGIC = 0x4D;
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#region Nested type: Entry
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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readonly struct Entry
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{
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public readonly uint reserved;
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public readonly byte type;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
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public readonly byte[] reserved2;
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public readonly uint offset;
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public readonly uint size;
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}
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#endregion
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#region Nested type: Table
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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readonly struct Table
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{
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 270)]
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public readonly byte[] reserved;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
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public readonly Entry[] entries;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 208)]
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public readonly byte[] padding;
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public readonly ushort magic;
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}
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#endregion
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#region IPartition Members
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/// <inheritdoc />
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public string Name => Localization.RioKarma_Name;
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/// <inheritdoc />
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public Guid Id => new("246A6D93-4F1A-1F8A-344D-50187A5513A9");
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/// <inheritdoc />
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public string Author => Authors.NATALIA_PORTILLO;
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/// <inheritdoc />
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public bool GetInformation(IMediaImage imagePlugin, out List<Partition> partitions, ulong sectorOffset)
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{
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partitions = null;
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ErrorNumber errno = imagePlugin.ReadSector(sectorOffset, false, out byte[] sector, out _);
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if(errno != ErrorNumber.NoError || sector.Length < 512) return false;
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Table table = Marshal.ByteArrayToStructureLittleEndian<Table>(sector);
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if(table.magic != KARMA_MAGIC) return false;
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ulong counter = 0;
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partitions = (from entry in table.entries
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let part = new Partition
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{
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Start = entry.offset,
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Offset = (ulong)(entry.offset * sector.Length),
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Size = entry.size,
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Length = (ulong)(entry.size * sector.Length),
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Type = Localization.Rio_Karma,
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Sequence = counter++,
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Scheme = Name
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}
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where entry.type == ENTRY_MAGIC
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select part).ToList();
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return true;
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}
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#endregion
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} |