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https://github.com/aaru-dps/Aaru.git
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Refactor image classes and split them to smaller files.
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250
DiscImageChef.DiscImages/BLU/Read.cs
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250
DiscImageChef.DiscImages/BLU/Read.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 : 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 © 2011-2018 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.IO;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.CommonTypes.Enums;
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using DiscImageChef.CommonTypes.Exceptions;
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using DiscImageChef.CommonTypes.Interfaces;
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using DiscImageChef.Console;
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namespace DiscImageChef.DiscImages
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{
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public partial class Blu
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{
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public bool 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 {DeviceName = new byte[0x0D]};
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BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
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byte[] header = new byte[0x17];
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stream.Read(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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DicConsole.DebugWriteLine("BLU plugin", "ImageHeader.deviceName = \"{0}\"",
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StringHandlers.CToString(imageHeader.DeviceName));
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DicConsole.DebugWriteLine("BLU plugin", "ImageHeader.deviceType = {0}", imageHeader.DeviceType);
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DicConsole.DebugWriteLine("BLU plugin", "ImageHeader.deviceBlock = {0}", imageHeader.DeviceBlocks);
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DicConsole.DebugWriteLine("BLU plugin", "ImageHeader.bytesPerBlock = {0}", imageHeader.BytesPerBlock);
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for(int i = 0; i < 0xD; i++)
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if(imageHeader.DeviceName[i] < 0x20)
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return false;
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if((imageHeader.BytesPerBlock & 0xFE00) != 0x200) return false;
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stream.Seek(0, SeekOrigin.Begin);
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header = new byte[imageHeader.BytesPerBlock];
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stream.Read(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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byte[] 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 =
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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 =
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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 =
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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 =
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imageInfo.Sectors == 0x022C7C ? MediaType.PriamDataTower : 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.GetCreationTime();
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imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
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imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
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bluImageFilter = imageFilter;
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imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
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if(bptag > 0) imageInfo.ReadableSectorTags.Add(SectorTagType.AppleSectorTag);
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DicConsole.VerboseWriteLine("BLU image contains a disk of type {0}", imageInfo.MediaType);
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return true;
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}
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public byte[] ReadSector(ulong sectorAddress)
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{
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return ReadSectors(sectorAddress, 1);
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}
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public byte[] ReadSectorTag(ulong sectorAddress, SectorTagType tag)
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{
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return ReadSectorsTag(sectorAddress, 1, tag);
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}
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public byte[] ReadSectors(ulong sectorAddress, uint length)
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{
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if(sectorAddress > imageInfo.Sectors - 1)
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throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
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if(sectorAddress + length > imageInfo.Sectors)
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throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");
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MemoryStream buffer = new MemoryStream();
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int seek = 0;
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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(int i = 0; i < length; i++)
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{
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stream.Seek(seek, SeekOrigin.Current);
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byte[] sector = new byte[read];
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stream.Read(sector, 0, read);
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buffer.Write(sector, 0, read);
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stream.Seek(skip, SeekOrigin.Current);
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}
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return buffer.ToArray();
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}
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public byte[] ReadSectorsTag(ulong sectorAddress, uint length, SectorTagType tag)
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{
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if(tag != SectorTagType.AppleSectorTag)
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throw new FeatureUnsupportedImageException($"Tag {tag} not supported by image format");
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if(bptag == 0) throw new FeatureNotPresentImageException("Disk image does not have tags");
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if(sectorAddress > imageInfo.Sectors - 1)
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throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
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if(sectorAddress + length > imageInfo.Sectors)
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throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");
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MemoryStream buffer = new MemoryStream();
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int seek = 0x200;
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int read = bptag;
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int skip = 0;
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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(int i = 0; i < length; i++)
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{
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stream.Seek(seek, SeekOrigin.Current);
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byte[] sector = new byte[read];
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stream.Read(sector, 0, read);
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buffer.Write(sector, 0, read);
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stream.Seek(skip, SeekOrigin.Current);
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}
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return buffer.ToArray();
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}
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public byte[] ReadSectorLong(ulong sectorAddress)
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{
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return ReadSectorsLong(sectorAddress, 1);
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}
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public byte[] ReadSectorsLong(ulong sectorAddress, uint length)
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{
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if(sectorAddress > imageInfo.Sectors - 1)
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throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
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if(sectorAddress + length > imageInfo.Sectors)
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throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");
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byte[] 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.Read(buffer, 0, buffer.Length);
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return buffer;
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}
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// TODO: Check tag checkums
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public bool? VerifySector(ulong sectorAddress)
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{
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return null;
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}
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public bool? VerifySectors(ulong sectorAddress, uint length, out List<ulong> failingLbas,
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out List<ulong> unknownLbas)
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{
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failingLbas = new List<ulong>();
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unknownLbas = new List<ulong>();
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for(ulong i = sectorAddress; i < sectorAddress + length; i++) unknownLbas.Add(i);
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return null;
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}
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}
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}
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