mirror of
https://github.com/aaru-dps/Aaru.git
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275 lines
10 KiB
C#
275 lines
10 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 Basic Lisa Utility 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 © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Diagnostics.CodeAnalysis;
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using System.IO;
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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.Helpers;
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using Aaru.Logging;
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namespace Aaru.Images;
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[SuppressMessage("ReSharper", "UnusedType.Global")]
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public sealed partial class Blu
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{
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#region IWritableImage 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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_imageHeader = new BluHeader
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{
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DeviceName = new byte[0x0D]
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};
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var header = new byte[0x17];
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stream.EnsureRead(header, 0, 0x17);
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Array.Copy(header, 0, _imageHeader.DeviceName, 0, 0x0D);
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_imageHeader.DeviceType = BigEndianBitConverter.ToUInt32(header, 0x0C) & 0x00FFFFFF;
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_imageHeader.DeviceBlocks = BigEndianBitConverter.ToUInt32(header, 0x11) & 0x00FFFFFF;
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_imageHeader.BytesPerBlock = BigEndianBitConverter.ToUInt16(header, 0x15);
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AaruLogging.Debug(MODULE_NAME,
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"ImageHeader.deviceName = \"{0}\"",
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StringHandlers.CToString(_imageHeader.DeviceName));
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AaruLogging.Debug(MODULE_NAME, "ImageHeader.deviceType = {0}", _imageHeader.DeviceType);
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AaruLogging.Debug(MODULE_NAME, "ImageHeader.deviceBlock = {0}", _imageHeader.DeviceBlocks);
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AaruLogging.Debug(MODULE_NAME, "ImageHeader.bytesPerBlock = {0}", _imageHeader.BytesPerBlock);
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for(var i = 0; i < 0xD; i++)
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{
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if(_imageHeader.DeviceName[i] < 0x20) return ErrorNumber.InvalidArgument;
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}
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if((_imageHeader.BytesPerBlock & 0xFE00) != 0x200) return ErrorNumber.InvalidArgument;
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stream.Seek(0, SeekOrigin.Begin);
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header = new byte[_imageHeader.BytesPerBlock];
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stream.EnsureRead(header, 0, _imageHeader.BytesPerBlock);
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_imageInfo.SectorSize = 0x200;
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_imageInfo.Sectors = _imageHeader.DeviceBlocks;
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_imageInfo.ImageSize = _imageHeader.DeviceBlocks * _imageHeader.BytesPerBlock;
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_bptag = _imageHeader.BytesPerBlock - 0x200;
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var hdrTag = new byte[_bptag];
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Array.Copy(header, 0x200, hdrTag, 0, _bptag);
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switch(StringHandlers.CToString(_imageHeader.DeviceName))
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{
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case PROFILE_NAME:
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_imageInfo.MediaType = _imageInfo.Sectors == 0x2600 ? MediaType.AppleProfile : MediaType.GENERIC_HDD;
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_imageInfo.Cylinders = 152;
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_imageInfo.Heads = 4;
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_imageInfo.SectorsPerTrack = 16;
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break;
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case PROFILE10_NAME:
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_imageInfo.MediaType = _imageInfo.Sectors == 0x4C00 ? MediaType.AppleProfile : MediaType.GENERIC_HDD;
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_imageInfo.Cylinders = 304;
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_imageInfo.Heads = 4;
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_imageInfo.SectorsPerTrack = 16;
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break;
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case WIDGET_NAME:
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_imageInfo.MediaType = _imageInfo.Sectors == 0x4C00 ? MediaType.AppleWidget : MediaType.GENERIC_HDD;
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_imageInfo.Cylinders = 304;
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_imageInfo.Heads = 4;
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_imageInfo.SectorsPerTrack = 16;
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break;
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case PRIAM_NAME:
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_imageInfo.MediaType = _imageInfo.Sectors == 0x022C7C
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? MediaType.PriamDataTower
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: MediaType.GENERIC_HDD;
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// This values are invented...
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_imageInfo.Cylinders = 419;
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_imageInfo.Heads = 4;
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_imageInfo.SectorsPerTrack = 85;
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break;
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default:
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_imageInfo.MediaType = MediaType.GENERIC_HDD;
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_imageInfo.Cylinders = (uint)(_imageInfo.Sectors / 16 / 63);
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_imageInfo.Heads = 16;
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_imageInfo.SectorsPerTrack = 63;
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break;
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}
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_imageInfo.Application = StringHandlers.CToString(hdrTag);
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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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_bluImageFilter = imageFilter;
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_imageInfo.MetadataMediaType = MetadataMediaType.BlockMedia;
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if(_bptag > 0) _imageInfo.ReadableSectorTags.Add(SectorTagType.AppleSonyTag);
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AaruLogging.Verbose(Localization.BLU_image_contains_a_disk_of_type_0, _imageInfo.MediaType);
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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, bool negative, out byte[] buffer, out SectorStatus sectorStatus)
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{
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sectorStatus = SectorStatus.Dumped;
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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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if(negative) return ErrorNumber.NotSupported;
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if(sectorAddress > _imageInfo.Sectors - 1) return ErrorNumber.OutOfRange;
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if(sectorAddress + length > _imageInfo.Sectors) return ErrorNumber.OutOfRange;
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sectorStatus = new SectorStatus[length];
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for(uint i = 0; i < length; i++) sectorStatus[i] = SectorStatus.Dumped;
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var ms = new MemoryStream();
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const int read = 0x200;
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int skip = _bptag;
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Stream stream = _bluImageFilter.GetDataForkStream();
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stream.Seek((long)((sectorAddress + 1) * _imageHeader.BytesPerBlock), SeekOrigin.Begin);
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for(var i = 0; i < length; i++)
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{
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var sector = new byte[read];
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stream.EnsureRead(sector, 0, read);
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ms.Write(sector, 0, read);
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stream.Seek(skip, SeekOrigin.Current);
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}
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buffer = ms.ToArray();
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return ErrorNumber.NoError;
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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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if(negative) return ErrorNumber.NotSupported;
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if(tag != SectorTagType.AppleSonyTag) return ErrorNumber.NotSupported;
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if(_bptag == 0) return ErrorNumber.NoData;
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if(sectorAddress > _imageInfo.Sectors - 1) return ErrorNumber.SectorNotFound;
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if(sectorAddress + length > _imageInfo.Sectors) return ErrorNumber.SectorNotFound;
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var ms = new MemoryStream();
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const int seek = 0x200;
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int read = _bptag;
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Stream stream = _bluImageFilter.GetDataForkStream();
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stream.Seek((long)((sectorAddress + 1) * _imageHeader.BytesPerBlock), SeekOrigin.Begin);
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for(var i = 0; i < length; i++)
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{
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stream.Seek(seek, SeekOrigin.Current);
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var sector = new byte[read];
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stream.EnsureRead(sector, 0, read);
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ms.Write(sector, 0, read);
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}
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buffer = ms.ToArray();
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return ErrorNumber.NoError;
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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.Dumped;
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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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if(negative) return ErrorNumber.NotSupported;
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if(sectorAddress > _imageInfo.Sectors - 1) return ErrorNumber.OutOfRange;
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if(sectorAddress + length > _imageInfo.Sectors) return ErrorNumber.OutOfRange;
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sectorStatus = new SectorStatus[length];
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for(uint i = 0; i < length; i++) sectorStatus[i] = SectorStatus.Dumped;
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buffer = new byte[length * _imageHeader.BytesPerBlock];
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Stream stream = _bluImageFilter.GetDataForkStream();
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stream.Seek((long)((sectorAddress + 1) * _imageHeader.BytesPerBlock), SeekOrigin.Begin);
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stream.EnsureRead(buffer, 0, buffer.Length);
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return ErrorNumber.NoError;
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}
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#endregion
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} |