mirror of
https://github.com/aaru-dps/Aaru.git
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Natalia Portillo
828c1e3da0
Introduces constant fields for respective debug module names, replacing the hardcoded ones. This is done to standardize the naming convention, reduce redundancy and potentially avoid any typos or name mismatches across the project. This change makes the code more maintainable and easier to update in case module names need to be changed.
371 lines
14 KiB
C#
371 lines
14 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 Quasi88 disk 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 © 2011-2023 Natalia Portillo
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// ****************************************************************************/
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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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 Aaru.Console;
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using Aaru.Decoders.Floppy;
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using Aaru.Helpers;
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namespace Aaru.DiscImages;
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public sealed partial class D88
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{
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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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// Even if disk name is supposedly ASCII, I'm pretty sure most emulators allow Shift-JIS to be used :p
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var shiftjis = Encoding.GetEncoding("shift_jis");
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if(stream.Length < Marshal.SizeOf<Header>())
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return ErrorNumber.InvalidArgument;
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byte[] hdrB = new byte[Marshal.SizeOf<Header>()];
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stream.EnsureRead(hdrB, 0, hdrB.Length);
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Header hdr = Marshal.ByteArrayToStructureLittleEndian<Header>(hdrB);
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AaruConsole.DebugWriteLine(MODULE_NAME, "d88hdr.name = \"{0}\"", StringHandlers.CToString(hdr.name, shiftjis));
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AaruConsole.DebugWriteLine(MODULE_NAME, "d88hdr.reserved is empty? = {0}",
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hdr.reserved.SequenceEqual(_reservedEmpty));
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AaruConsole.DebugWriteLine(MODULE_NAME, "d88hdr.write_protect = 0x{0:X2}", hdr.write_protect);
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AaruConsole.DebugWriteLine(MODULE_NAME, "d88hdr.disk_type = {0} ({1})", hdr.disk_type, (byte)hdr.disk_type);
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AaruConsole.DebugWriteLine(MODULE_NAME, "d88hdr.disk_size = {0}", hdr.disk_size);
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if(hdr.disk_size != stream.Length)
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return ErrorNumber.InvalidArgument;
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if(hdr.disk_type != DiskType.D2 &&
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hdr.disk_type != DiskType.Dd2 &&
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hdr.disk_type != DiskType.Hd2)
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return ErrorNumber.InvalidArgument;
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if(!hdr.reserved.SequenceEqual(_reservedEmpty))
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return ErrorNumber.InvalidArgument;
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int trkCounter = 0;
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foreach(int t in hdr.track_table)
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{
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if(t > 0)
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trkCounter++;
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if(t < 0 ||
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t > stream.Length)
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return ErrorNumber.InvalidArgument;
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}
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization._0_tracks, trkCounter);
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if(trkCounter == 0)
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return ErrorNumber.InvalidArgument;
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hdrB = new byte[Marshal.SizeOf<SectorHeader>()];
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stream.Seek(hdr.track_table[0], SeekOrigin.Begin);
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stream.EnsureRead(hdrB, 0, hdrB.Length);
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SectorHeader sechdr = Marshal.ByteArrayToStructureLittleEndian<SectorHeader>(hdrB);
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AaruConsole.DebugWriteLine(MODULE_NAME, "sechdr.c = {0}", sechdr.c);
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AaruConsole.DebugWriteLine(MODULE_NAME, "sechdr.h = {0}", sechdr.h);
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AaruConsole.DebugWriteLine(MODULE_NAME, "sechdr.r = {0}", sechdr.r);
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AaruConsole.DebugWriteLine(MODULE_NAME, "sechdr.n = {0}", sechdr.n);
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AaruConsole.DebugWriteLine(MODULE_NAME, "sechdr.spt = {0}", sechdr.spt);
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AaruConsole.DebugWriteLine(MODULE_NAME, "sechdr.density = {0}", sechdr.density);
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AaruConsole.DebugWriteLine(MODULE_NAME, "sechdr.deleted_mark = {0}", sechdr.deleted_mark);
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AaruConsole.DebugWriteLine(MODULE_NAME, "sechdr.status = {0}", sechdr.status);
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AaruConsole.DebugWriteLine(MODULE_NAME, "sechdr.size_of_data = {0}", sechdr.size_of_data);
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short spt = sechdr.spt;
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IBMSectorSizeCode bps = sechdr.n;
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bool allEqual = true;
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_sectorsData = new List<byte[]>();
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for(int i = 0; i < trkCounter; i++)
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{
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stream.Seek(hdr.track_table[i], SeekOrigin.Begin);
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stream.EnsureRead(hdrB, 0, hdrB.Length);
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SortedDictionary<byte, byte[]> sectors = new();
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sechdr = Marshal.ByteArrayToStructureLittleEndian<SectorHeader>(hdrB);
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if(sechdr.spt != spt ||
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sechdr.n != bps)
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{
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.Disk_tracks_are_not_same_size, sechdr.spt, spt,
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sechdr.n, bps, i, 0);
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allEqual = false;
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}
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short maxJ = sechdr.spt;
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byte[] secB;
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for(short j = 1; j < maxJ; j++)
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{
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secB = new byte[sechdr.size_of_data];
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stream.EnsureRead(secB, 0, secB.Length);
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sectors.Add(sechdr.r, secB);
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stream.EnsureRead(hdrB, 0, hdrB.Length);
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sechdr = Marshal.ByteArrayToStructureLittleEndian<SectorHeader>(hdrB);
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if(sechdr.spt == spt &&
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sechdr.n == bps)
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continue;
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.Disk_tracks_are_not_same_size, sechdr.spt, spt,
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sechdr.n, bps, i, j, sechdr.deleted_mark);
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allEqual = false;
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}
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secB = new byte[sechdr.size_of_data];
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stream.EnsureRead(secB, 0, secB.Length);
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sectors.Add(sechdr.r, secB);
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foreach(KeyValuePair<byte, byte[]> kvp in sectors)
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_sectorsData.Add(kvp.Value);
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}
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization._0_sectors, _sectorsData.Count);
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_imageInfo.MediaType = MediaType.Unknown;
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if(allEqual)
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if(trkCounter == 154 &&
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spt == 26 &&
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bps == IBMSectorSizeCode.EighthKilo)
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_imageInfo.MediaType = MediaType.NEC_8_SD;
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else if(bps == IBMSectorSizeCode.QuarterKilo)
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_imageInfo.MediaType = trkCounter switch
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{
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35 when spt == 16 => MediaType.MetaFloppy_Mod_I,
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77 when spt == 16 => MediaType.MetaFloppy_Mod_II,
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80 when spt == 16 => MediaType.NEC_525_SS,
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154 when spt == 26 => MediaType.NEC_8_DD,
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160 when spt == 16 => MediaType.NEC_525_DS,
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_ => _imageInfo.MediaType
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};
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else if(trkCounter == 154 &&
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spt == 8 &&
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bps == IBMSectorSizeCode.Kilo)
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_imageInfo.MediaType = MediaType.NEC_525_HD;
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else if(bps == IBMSectorSizeCode.HalfKilo)
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switch(hdr.track_table.Length)
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{
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case 40:
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{
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_imageInfo.MediaType = spt switch
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{
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8 => MediaType.DOS_525_SS_DD_8,
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9 => MediaType.DOS_525_SS_DD_9,
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_ => _imageInfo.MediaType
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};
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}
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break;
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case 80:
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{
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_imageInfo.MediaType = spt switch
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{
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8 => MediaType.DOS_525_DS_DD_8,
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9 => MediaType.DOS_525_DS_DD_9,
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_ => _imageInfo.MediaType
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};
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}
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break;
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case 160:
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{
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_imageInfo.MediaType = spt switch
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{
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15 => MediaType.NEC_35_HD_15,
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9 => MediaType.DOS_35_DS_DD_9,
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18 => MediaType.DOS_35_HD,
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36 => MediaType.DOS_35_ED,
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_ => _imageInfo.MediaType
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};
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}
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break;
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case 480:
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if(spt == 38)
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_imageInfo.MediaType = MediaType.NEC_35_TD;
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break;
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}
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.MediaType_0, _imageInfo.MediaType);
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_imageInfo.ImageSize = (ulong)hdr.disk_size;
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_imageInfo.CreationTime = imageFilter.CreationTime;
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_imageInfo.LastModificationTime = imageFilter.LastWriteTime;
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_imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.Filename);
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_imageInfo.Sectors = (ulong)_sectorsData.Count;
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_imageInfo.Comments = StringHandlers.CToString(hdr.name, shiftjis);
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_imageInfo.MetadataMediaType = MetadataMediaType.BlockMedia;
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_imageInfo.SectorSize = (uint)(128 << (int)bps);
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switch(_imageInfo.MediaType)
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{
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case MediaType.NEC_525_SS:
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_imageInfo.Cylinders = 80;
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_imageInfo.Heads = 1;
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_imageInfo.SectorsPerTrack = 16;
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break;
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case MediaType.NEC_8_SD:
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case MediaType.NEC_8_DD:
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_imageInfo.Cylinders = 77;
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_imageInfo.Heads = 2;
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_imageInfo.SectorsPerTrack = 26;
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break;
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case MediaType.NEC_525_DS:
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_imageInfo.Cylinders = 80;
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_imageInfo.Heads = 2;
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_imageInfo.SectorsPerTrack = 16;
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break;
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case MediaType.NEC_525_HD:
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_imageInfo.Cylinders = 77;
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_imageInfo.Heads = 2;
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_imageInfo.SectorsPerTrack = 8;
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break;
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case MediaType.DOS_525_SS_DD_8:
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_imageInfo.Cylinders = 40;
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_imageInfo.Heads = 1;
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_imageInfo.SectorsPerTrack = 8;
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break;
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case MediaType.DOS_525_SS_DD_9:
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_imageInfo.Cylinders = 40;
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_imageInfo.Heads = 1;
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_imageInfo.SectorsPerTrack = 9;
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break;
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case MediaType.DOS_525_DS_DD_8:
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_imageInfo.Cylinders = 40;
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_imageInfo.Heads = 2;
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_imageInfo.SectorsPerTrack = 8;
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break;
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case MediaType.DOS_525_DS_DD_9:
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_imageInfo.Cylinders = 40;
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_imageInfo.Heads = 2;
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_imageInfo.SectorsPerTrack = 9;
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break;
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case MediaType.NEC_35_HD_15:
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_imageInfo.Cylinders = 80;
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_imageInfo.Heads = 2;
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_imageInfo.SectorsPerTrack = 15;
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break;
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case MediaType.DOS_35_DS_DD_9:
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_imageInfo.Cylinders = 80;
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_imageInfo.Heads = 2;
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_imageInfo.SectorsPerTrack = 9;
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break;
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case MediaType.DOS_35_HD:
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_imageInfo.Cylinders = 80;
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_imageInfo.Heads = 2;
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_imageInfo.SectorsPerTrack = 18;
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break;
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case MediaType.DOS_35_ED:
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_imageInfo.Cylinders = 80;
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_imageInfo.Heads = 2;
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_imageInfo.SectorsPerTrack = 36;
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break;
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case MediaType.NEC_35_TD:
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_imageInfo.Cylinders = 240;
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_imageInfo.Heads = 2;
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_imageInfo.SectorsPerTrack = 38;
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break;
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case MediaType.MetaFloppy_Mod_I:
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_imageInfo.Cylinders = 35;
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_imageInfo.Heads = 1;
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_imageInfo.SectorsPerTrack = 16;
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break;
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case MediaType.MetaFloppy_Mod_II:
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_imageInfo.Cylinders = 77;
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_imageInfo.Heads = 1;
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_imageInfo.SectorsPerTrack = 16;
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break;
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}
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return ErrorNumber.NoError;
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}
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/// <inheritdoc />
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public ErrorNumber ReadSector(ulong sectorAddress, out byte[] buffer) => ReadSectors(sectorAddress, 1, out buffer);
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/// <inheritdoc />
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public ErrorNumber ReadSectors(ulong sectorAddress, uint length, out byte[] buffer)
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{
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buffer = null;
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if(sectorAddress > _imageInfo.Sectors - 1)
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return ErrorNumber.OutOfRange;
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if(sectorAddress + length > _imageInfo.Sectors)
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return ErrorNumber.OutOfRange;
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var ms = new MemoryStream();
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for(int i = 0; i < length; i++)
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ms.Write(_sectorsData[(int)sectorAddress + i], 0, _sectorsData[(int)sectorAddress + i].Length);
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buffer = ms.ToArray();
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return ErrorNumber.NoError;
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}
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} |