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109 lines
4.5 KiB
C#
109 lines
4.5 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : Info.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : FATX filesystem plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies the FATX filesystem 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 © 2011-2019 Natalia Portillo
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// ****************************************************************************/
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using System.Text;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.CommonTypes.Interfaces;
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using DiscImageChef.Helpers;
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using Schemas;
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namespace DiscImageChef.Filesystems.FATX
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{
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public partial class XboxFatPlugin
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{
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public bool Identify(IMediaImage imagePlugin, Partition partition)
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{
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if(imagePlugin.Info.SectorSize < 512) return false;
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byte[] sector = imagePlugin.ReadSector(partition.Start);
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Superblock sb = Marshal.ByteArrayToStructureBigEndian<Superblock>(sector);
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return sb.magic == FATX_MAGIC || sb.magic == FATX_CIGAM;
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}
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public void GetInformation(IMediaImage imagePlugin, Partition partition, out string information,
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Encoding encoding)
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{
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Encoding = Encoding.UTF8;
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information = "";
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if(imagePlugin.Info.SectorSize < 512) return;
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bool bigEndian = true;
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byte[] sector = imagePlugin.ReadSector(partition.Start);
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Superblock fatxSb = Marshal.ByteArrayToStructureBigEndian<Superblock>(sector);
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if(fatxSb.magic == FATX_CIGAM)
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{
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fatxSb = Marshal.ByteArrayToStructureLittleEndian<Superblock>(sector);
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bigEndian = false;
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}
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if(fatxSb.magic != FATX_MAGIC) return;
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int logicalSectorsPerPhysicalSectors = partition.Offset == 0 ? 8 : 1;
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StringBuilder sb = new StringBuilder();
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sb.AppendLine("FATX filesystem");
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sb.AppendFormat("{0} logical sectors ({1} bytes) per physical sector", logicalSectorsPerPhysicalSectors,
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logicalSectorsPerPhysicalSectors * imagePlugin.Info.SectorSize).AppendLine();
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sb.AppendFormat("{0} sectors ({1} bytes) per cluster", fatxSb.sectorsPerCluster,
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fatxSb.sectorsPerCluster * logicalSectorsPerPhysicalSectors * imagePlugin.Info.SectorSize)
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.AppendLine();
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sb.AppendFormat("Root directory starts on cluster {0}", fatxSb.rootDirectoryCluster).AppendLine();
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string volumeLabel = StringHandlers.CToString(fatxSb.volumeLabel,
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bigEndian ? Encoding.BigEndianUnicode : Encoding.Unicode,
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true);
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sb.AppendFormat("Volume label: {0}", volumeLabel).AppendLine();
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sb.AppendFormat("Volume serial: {0:X8}", fatxSb.id).AppendLine();
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information = sb.ToString();
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XmlFsType = new FileSystemType
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{
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Type = "FATX filesystem",
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ClusterSize =
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(int)(fatxSb.sectorsPerCluster * logicalSectorsPerPhysicalSectors *
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imagePlugin.Info.SectorSize),
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VolumeName = volumeLabel,
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VolumeSerial = $"{fatxSb.id:X8}"
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};
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XmlFsType.Clusters = (long)((partition.End - partition.Start + 1) * imagePlugin.Info.SectorSize /
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(ulong)XmlFsType.ClusterSize);
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}
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}
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} |