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323 lines
12 KiB
C#
323 lines
12 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Read.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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// Reads KryoFlux STREAM 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;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.Filters;
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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 KryoFlux
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{
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#region IMediaImage Members
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/// <inheritdoc />
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public ErrorNumber Open(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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if(stream.Length < Marshal.SizeOf<OobBlock>()) return ErrorNumber.InvalidArgument;
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var hdr = new byte[Marshal.SizeOf<OobBlock>()];
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stream.EnsureRead(hdr, 0, Marshal.SizeOf<OobBlock>());
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OobBlock header = Marshal.ByteArrayToStructureLittleEndian<OobBlock>(hdr);
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stream.Seek(-Marshal.SizeOf<OobBlock>(), SeekOrigin.End);
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hdr = new byte[Marshal.SizeOf<OobBlock>()];
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stream.EnsureRead(hdr, 0, Marshal.SizeOf<OobBlock>());
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OobBlock footer = Marshal.ByteArrayToStructureLittleEndian<OobBlock>(hdr);
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if(header.blockId != BlockIds.Oob ||
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header.blockType != OobTypes.KFInfo ||
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footer.blockId != BlockIds.Oob ||
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footer.blockType != OobTypes.EOF ||
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footer.length != 0x0D0D)
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return ErrorNumber.InvalidArgument;
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// TODO: This is supposing NoFilter, shouldn't
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tracks = new SortedDictionary<byte, IFilter>();
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byte step = 1;
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byte heads = 2;
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var topHead = false;
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string basename = Path.Combine(imageFilter.ParentFolder, imageFilter.Filename[..^8]);
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for(byte t = 0; t < 166; t += step)
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{
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int cylinder = t / heads;
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int head = topHead ? 1 : t % heads;
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string trackfile = Directory.Exists(basename)
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? Path.Combine(basename, $"{cylinder:D2}.{head:D1}.raw")
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: $"{basename}{cylinder:D2}.{head:D1}.raw";
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if(!File.Exists(trackfile))
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{
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switch(cylinder)
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{
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case 0 when head == 0:
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AaruLogging.Debug(MODULE_NAME,
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Localization.Cannot_find_cyl_0_hd_0_supposing_only_top_head_was_dumped);
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topHead = true;
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heads = 1;
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continue;
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case 0:
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AaruLogging.Debug(MODULE_NAME,
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Localization.Cannot_find_cyl_0_hd_1_supposing_only_bottom_head_was_dumped);
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heads = 1;
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continue;
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case 1:
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AaruLogging.Debug(MODULE_NAME, Localization.Cannot_find_cyl_1_supposing_double_stepping);
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step = 2;
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continue;
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}
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AaruLogging.Debug(MODULE_NAME, Localization.Arrived_end_of_disk_at_cylinder_0, cylinder);
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break;
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}
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var trackFilter = new ZZZNoFilter();
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ErrorNumber errno = trackFilter.Open(trackfile);
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if(errno != ErrorNumber.NoError) return errno;
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_imageInfo.CreationTime = DateTime.MaxValue;
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_imageInfo.LastModificationTime = DateTime.MinValue;
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Stream trackStream = trackFilter.GetDataForkStream();
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while(trackStream.Position < trackStream.Length)
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{
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var blockId = (byte)trackStream.ReadByte();
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switch(blockId)
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{
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case (byte)BlockIds.Oob:
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{
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trackStream.Position--;
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var oob = new byte[Marshal.SizeOf<OobBlock>()];
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trackStream.EnsureRead(oob, 0, Marshal.SizeOf<OobBlock>());
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OobBlock oobBlk = Marshal.ByteArrayToStructureLittleEndian<OobBlock>(oob);
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if(oobBlk.blockType == OobTypes.EOF)
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{
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trackStream.Position = trackStream.Length;
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break;
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}
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if(oobBlk.blockType != OobTypes.KFInfo)
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{
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trackStream.Position += oobBlk.length;
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break;
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}
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var kfinfo = new byte[oobBlk.length];
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trackStream.EnsureRead(kfinfo, 0, oobBlk.length);
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string kfinfoStr = StringHandlers.CToString(kfinfo);
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string[] lines = kfinfoStr.Split([','], StringSplitOptions.RemoveEmptyEntries);
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DateTime blockDate = DateTime.Now;
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DateTime blockTime = DateTime.Now;
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var foundDate = false;
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foreach(string[] kvp in lines.Select(static line => line.Split('='))
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.Where(static kvp => kvp.Length == 2))
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{
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kvp[0] = kvp[0].Trim();
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kvp[1] = kvp[1].Trim();
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AaruLogging.Debug(MODULE_NAME, "\"{0}\" = \"{1}\"", kvp[0], kvp[1]);
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switch(kvp[0])
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{
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case HOST_DATE:
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if(DateTime.TryParseExact(kvp[1],
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"yyyy.MM.dd",
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CultureInfo.InvariantCulture,
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DateTimeStyles.AssumeLocal,
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out blockDate))
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foundDate = true;
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break;
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case HOST_TIME:
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DateTime.TryParseExact(kvp[1],
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"HH:mm:ss",
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CultureInfo.InvariantCulture,
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DateTimeStyles.AssumeLocal,
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out blockTime);
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break;
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case KF_NAME:
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_imageInfo.Application = kvp[1];
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break;
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case KF_VERSION:
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_imageInfo.ApplicationVersion = kvp[1];
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break;
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}
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}
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if(foundDate)
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{
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var blockTimestamp = new DateTime(blockDate.Year,
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blockDate.Month,
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blockDate.Day,
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blockTime.Hour,
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blockTime.Minute,
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blockTime.Second);
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AaruLogging.Debug(MODULE_NAME, Localization.Found_timestamp_0, blockTimestamp);
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if(blockTimestamp < Info.CreationTime) _imageInfo.CreationTime = blockTimestamp;
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if(blockTimestamp > Info.LastModificationTime)
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_imageInfo.LastModificationTime = blockTimestamp;
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}
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break;
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}
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case (byte)BlockIds.Flux2:
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case (byte)BlockIds.Flux2_1:
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case (byte)BlockIds.Flux2_2:
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case (byte)BlockIds.Flux2_3:
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case (byte)BlockIds.Flux2_4:
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case (byte)BlockIds.Flux2_5:
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case (byte)BlockIds.Flux2_6:
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case (byte)BlockIds.Flux2_7:
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case (byte)BlockIds.Nop2:
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trackStream.Position++;
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continue;
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case (byte)BlockIds.Nop3:
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case (byte)BlockIds.Flux3:
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trackStream.Position += 2;
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continue;
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default:
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continue;
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}
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}
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tracks.Add(t, trackFilter);
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}
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_imageInfo.Heads = heads;
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_imageInfo.Cylinders = (uint)(tracks.Count / heads);
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AaruLogging.Error(Localization.Flux_decoding_is_not_yet_implemented);
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return ErrorNumber.NotImplemented;
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}
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/// <inheritdoc />
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public ErrorNumber ReadMediaTag(MediaTagType tag, out byte[] buffer)
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{
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buffer = null;
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return ErrorNumber.NotImplemented;
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}
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/// <inheritdoc />
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public ErrorNumber ReadSector(ulong sectorAddress, bool negative, out byte[] buffer, out SectorStatus sectorStatus)
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{
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sectorStatus = SectorStatus.NotDumped;
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return ReadSectors(sectorAddress, negative, 1, out buffer, out _);
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}
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/// <inheritdoc />
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public ErrorNumber ReadSectorTag(ulong sectorAddress, bool negative, SectorTagType tag, out byte[] buffer) =>
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ReadSectorsTag(sectorAddress, negative, 1, tag, out buffer);
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/// <inheritdoc />
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public ErrorNumber ReadSectors(ulong sectorAddress, bool negative, uint length, out byte[] buffer,
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out SectorStatus[] sectorStatus)
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{
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buffer = null;
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sectorStatus = null;
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return ErrorNumber.NotImplemented;
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}
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/// <inheritdoc />
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public ErrorNumber ReadSectorsTag(ulong sectorAddress, bool negative, uint length, SectorTagType tag,
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out byte[] buffer)
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{
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buffer = null;
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return ErrorNumber.NotImplemented;
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}
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/// <inheritdoc />
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public ErrorNumber ReadSectorLong(ulong sectorAddress, bool negative, out byte[] buffer,
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out SectorStatus sectorStatus)
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{
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sectorStatus = SectorStatus.NotDumped;
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return ReadSectorsLong(sectorAddress, negative, 1, out buffer, out _);
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}
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/// <inheritdoc />
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public ErrorNumber ReadSectorsLong(ulong sectorAddress, bool negative, uint length, out byte[] buffer,
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out SectorStatus[] sectorStatus)
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{
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buffer = null;
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sectorStatus = null;
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return ErrorNumber.NotImplemented;
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}
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#endregion
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} |