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Refactor: Split ISO9660.
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226
DiscImageChef.Filesystems/ISO9660/Structs.cs
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226
DiscImageChef.Filesystems/ISO9660/Structs.cs
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// /***************************************************************************
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// The Disc Image Chef
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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 : Component
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Description
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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 © 2011-2017 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Runtime.InteropServices;
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using System.Text;
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namespace DiscImageChef.Filesystems.ISO9660
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{
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public partial class ISO9660 : Filesystem
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{
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct PrimaryVolumeDescriptor
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{
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public byte type;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
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public byte[] id;
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public byte version;
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// Only used in SVDs
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public byte flags;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
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public byte[] system_id;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
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public byte[] volume_id;
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public ulong reserved2;
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public ulong volume_space_size;
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// Only used in SVDs
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
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public byte[] escape_sequences;
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public uint volume_set_size;
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public uint volume_sequence_number;
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public uint logical_block_size;
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public ulong path_table_size;
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public uint type_1_path_table;
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public uint opt_type_1_path_table;
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public uint type_m_path_table;
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public uint opt_type_m_path_table;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 34)]
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public byte[] root_directory_record;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)]
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public byte[] volume_set_id;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)]
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public byte[] publisher_id;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)]
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public byte[] preparer_id;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)]
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public byte[] application_id;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 37)]
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public byte[] copyright_file_id;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 37)]
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public byte[] abstract_file_id;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 37)]
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public byte[] bibliographic_file_id;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)]
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public byte[] creation_date;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)]
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public byte[] modification_date;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)]
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public byte[] expiration_date;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)]
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public byte[] effective_date;
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public byte file_structure_version;
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public byte reserved4;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 512)]
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public byte[] application_data;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 653)]
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public byte[] reserved5;
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct BootRecord
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{
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public byte type;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
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public byte[] id;
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public byte version;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
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public byte[] system_id;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
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public byte[] boot_id;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 1977)]
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public byte[] boot_use;
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}
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struct DecodedVolumeDescriptor
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{
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public string SystemIdentifier;
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public string VolumeIdentifier;
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public string VolumeSetIdentifier;
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public string PublisherIdentifier;
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public string DataPreparerIdentifier;
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public string ApplicationIdentifier;
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public DateTime CreationTime;
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public bool HasModificationTime;
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public DateTime ModificationTime;
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public bool HasExpirationTime;
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public DateTime ExpirationTime;
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public bool HasEffectiveTime;
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public DateTime EffectiveTime;
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}
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static DecodedVolumeDescriptor DecodeJolietDescriptor(PrimaryVolumeDescriptor jolietvd)
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{
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DecodedVolumeDescriptor decodedVD = new DecodedVolumeDescriptor();
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decodedVD.SystemIdentifier = Encoding.BigEndianUnicode.GetString(jolietvd.system_id).TrimEnd().Trim(new[] { '\u0000' });
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decodedVD.VolumeIdentifier = Encoding.BigEndianUnicode.GetString(jolietvd.volume_id).TrimEnd().Trim(new[] { '\u0000' });
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decodedVD.VolumeSetIdentifier = Encoding.BigEndianUnicode.GetString(jolietvd.volume_set_id).TrimEnd().Trim(new[] { '\u0000' });
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decodedVD.PublisherIdentifier = Encoding.BigEndianUnicode.GetString(jolietvd.publisher_id).TrimEnd().Trim(new[] { '\u0000' });
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decodedVD.DataPreparerIdentifier = Encoding.BigEndianUnicode.GetString(jolietvd.preparer_id).TrimEnd().Trim(new[] { '\u0000' });
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decodedVD.ApplicationIdentifier = Encoding.BigEndianUnicode.GetString(jolietvd.application_id).TrimEnd().Trim(new[] { '\u0000' });
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if(jolietvd.creation_date[0] < 0x31 || jolietvd.creation_date[0] > 0x39)
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decodedVD.CreationTime = DateTime.MinValue;
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else
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decodedVD.CreationTime = DateHandlers.ISO9660ToDateTime(jolietvd.creation_date);
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if(jolietvd.modification_date[0] < 0x31 || jolietvd.modification_date[0] > 0x39)
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{
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decodedVD.HasModificationTime = false;
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}
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else
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{
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decodedVD.HasModificationTime = true;
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decodedVD.ModificationTime = DateHandlers.ISO9660ToDateTime(jolietvd.modification_date);
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}
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if(jolietvd.expiration_date[0] < 0x31 || jolietvd.expiration_date[0] > 0x39)
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{
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decodedVD.HasExpirationTime = false;
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}
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else
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{
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decodedVD.HasExpirationTime = true;
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decodedVD.ExpirationTime = DateHandlers.ISO9660ToDateTime(jolietvd.expiration_date);
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}
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if(jolietvd.effective_date[0] < 0x31 || jolietvd.effective_date[0] > 0x39)
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{
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decodedVD.HasEffectiveTime = false;
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}
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else
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{
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decodedVD.HasEffectiveTime = true;
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decodedVD.EffectiveTime = DateHandlers.ISO9660ToDateTime(jolietvd.effective_date);
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}
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return decodedVD;
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}
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static DecodedVolumeDescriptor DecodeVolumeDescriptor(PrimaryVolumeDescriptor pvd)
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{
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DecodedVolumeDescriptor decodedVD = new DecodedVolumeDescriptor();
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decodedVD.SystemIdentifier = Encoding.ASCII.GetString(pvd.system_id).TrimEnd().Trim(new[] { '\0' });
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decodedVD.VolumeIdentifier = Encoding.ASCII.GetString(pvd.volume_id).TrimEnd().Trim(new[] { '\0' });
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decodedVD.VolumeSetIdentifier = Encoding.ASCII.GetString(pvd.volume_set_id).TrimEnd().Trim(new[] { '\0' });
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decodedVD.PublisherIdentifier = Encoding.ASCII.GetString(pvd.publisher_id).TrimEnd().Trim(new[] { '\0' });
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decodedVD.DataPreparerIdentifier = Encoding.ASCII.GetString(pvd.preparer_id).TrimEnd().Trim(new[] { '\0' });
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decodedVD.ApplicationIdentifier = Encoding.ASCII.GetString(pvd.application_data).TrimEnd().Trim(new[] { '\0' });
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if(pvd.creation_date[0] == '0' || pvd.creation_date[0] == 0x00)
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decodedVD.CreationTime = DateTime.MinValue;
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else
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decodedVD.CreationTime = DateHandlers.ISO9660ToDateTime(pvd.creation_date);
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if(pvd.modification_date[0] == '0' || pvd.modification_date[0] == 0x00)
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{
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decodedVD.HasModificationTime = false;
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}
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else
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{
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decodedVD.HasModificationTime = true;
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decodedVD.ModificationTime = DateHandlers.ISO9660ToDateTime(pvd.modification_date);
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}
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if(pvd.expiration_date[0] == '0' || pvd.expiration_date[0] == 0x00)
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{
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decodedVD.HasExpirationTime = false;
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}
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else
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{
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decodedVD.HasExpirationTime = true;
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decodedVD.ExpirationTime = DateHandlers.ISO9660ToDateTime(pvd.expiration_date);
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}
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if(pvd.effective_date[0] == '0' || pvd.effective_date[0] == 0x00)
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{
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decodedVD.HasEffectiveTime = false;
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}
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else
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{
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decodedVD.HasEffectiveTime = true;
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decodedVD.EffectiveTime = DateHandlers.ISO9660ToDateTime(pvd.effective_date);
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}
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return decodedVD;
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}
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}
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}
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