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https://github.com/aaru-dps/Aaru.git
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Refactor image classes and split them to smaller files.
This commit is contained in:
510
DiscImageChef.DiscImages/UDIF/Read.cs
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510
DiscImageChef.DiscImages/UDIF/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 Apple Universal Disk Image Format.
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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 System.Linq;
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using System.Runtime.InteropServices;
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using Claunia.PropertyList;
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using Claunia.RsrcFork;
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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.Compression;
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using DiscImageChef.Console;
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using Ionic.Zlib;
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using SharpCompress.Compressors.ADC;
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using SharpCompress.Compressors.BZip2;
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using Version = Resources.Version;
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namespace DiscImageChef.DiscImages
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{
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public partial class Udif
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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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if(stream.Length < 512) return false;
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stream.Seek(-Marshal.SizeOf(footer), SeekOrigin.End);
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byte[] footerB = new byte[Marshal.SizeOf(footer)];
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stream.Read(footerB, 0, Marshal.SizeOf(footer));
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footer = BigEndianMarshal.ByteArrayToStructureBigEndian<UdifFooter>(footerB);
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if(footer.signature != UDIF_SIGNATURE)
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{
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stream.Seek(0, SeekOrigin.Begin);
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footerB = new byte[Marshal.SizeOf(footer)];
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stream.Read(footerB, 0, Marshal.SizeOf(footer));
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footer = BigEndianMarshal.ByteArrayToStructureBigEndian<UdifFooter>(footerB);
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if(footer.signature != UDIF_SIGNATURE) throw new Exception("Unable to find UDIF signature.");
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DicConsole.VerboseWriteLine("Found obsolete UDIF format.");
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}
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DicConsole.DebugWriteLine("UDIF plugin", "footer.signature = 0x{0:X8}", footer.signature);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.version = {0}", footer.version);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.headerSize = {0}", footer.headerSize);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.flags = {0}", footer.flags);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.runningDataForkOff = {0}", footer.runningDataForkOff);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.dataForkOff = {0}", footer.dataForkOff);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.dataForkLen = {0}", footer.dataForkLen);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.rsrcForkOff = {0}", footer.rsrcForkOff);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.rsrcForkLen = {0}", footer.rsrcForkLen);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.segmentNumber = {0}", footer.segmentNumber);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.segmentCount = {0}", footer.segmentCount);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.segmentId = {0}", footer.segmentId);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.dataForkChkType = {0}", footer.dataForkChkType);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.dataForkLen = {0}", footer.dataForkLen);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.dataForkChk = 0x{0:X8}", footer.dataForkChk);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.plistOff = {0}", footer.plistOff);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.plistLen = {0}", footer.plistLen);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.masterChkType = {0}", footer.masterChkType);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.masterChkLen = {0}", footer.masterChkLen);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.masterChk = 0x{0:X8}", footer.masterChk);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.imageVariant = {0}", footer.imageVariant);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.sectorCount = {0}", footer.sectorCount);
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DicConsole.DebugWriteLine("UDIF plugin", "footer.reserved1 is empty? = {0}",
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ArrayHelpers.ArrayIsNullOrEmpty(footer.reserved1));
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DicConsole.DebugWriteLine("UDIF plugin", "footer.reserved2 is empty? = {0}",
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ArrayHelpers.ArrayIsNullOrEmpty(footer.reserved2));
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DicConsole.DebugWriteLine("UDIF plugin", "footer.reserved3 is empty? = {0}",
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ArrayHelpers.ArrayIsNullOrEmpty(footer.reserved3));
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DicConsole.DebugWriteLine("UDIF plugin", "footer.reserved4 is empty? = {0}",
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ArrayHelpers.ArrayIsNullOrEmpty(footer.reserved4));
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// Block chunks and headers
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List<byte[]> blkxList = new List<byte[]>();
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chunks = new Dictionary<ulong, BlockChunk>();
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bool fakeBlockChunks = false;
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byte[] vers = null;
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if(footer.plistLen == 0 && footer.rsrcForkLen != 0)
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{
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DicConsole.DebugWriteLine("UDIF plugin", "Reading resource fork.");
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byte[] rsrcB = new byte[footer.rsrcForkLen];
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stream.Seek((long)footer.rsrcForkOff, SeekOrigin.Begin);
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stream.Read(rsrcB, 0, rsrcB.Length);
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ResourceFork rsrc = new ResourceFork(rsrcB);
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if(!rsrc.ContainsKey(BLOCK_OS_TYPE))
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throw new
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ImageNotSupportedException("Image resource fork doesn't contain UDIF block chunks. Please fill an issue and send it to us.");
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Resource blkxRez = rsrc.GetResource(BLOCK_OS_TYPE);
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if(blkxRez == null)
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throw new
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ImageNotSupportedException("Image resource fork doesn't contain UDIF block chunks. Please fill an issue and send it to us.");
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if(blkxRez.GetIds().Length == 0)
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throw new
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ImageNotSupportedException("Image resource fork doesn't contain UDIF block chunks. Please fill an issue and send it to us.");
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blkxList.AddRange(blkxRez.GetIds().Select(blkxId => blkxRez.GetResource(blkxId)));
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Resource versRez = rsrc.GetResource(0x76657273);
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if(versRez != null) vers = versRez.GetResource(versRez.GetIds()[0]);
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}
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else if(footer.plistLen != 0)
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{
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DicConsole.DebugWriteLine("UDIF plugin", "Reading property list.");
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byte[] plistB = new byte[footer.plistLen];
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stream.Seek((long)footer.plistOff, SeekOrigin.Begin);
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stream.Read(plistB, 0, plistB.Length);
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DicConsole.DebugWriteLine("UDIF plugin", "Parsing property list.");
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NSDictionary plist = (NSDictionary)XmlPropertyListParser.Parse(plistB);
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if(plist == null) throw new Exception("Could not parse property list.");
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if(!plist.TryGetValue(RESOURCE_FORK_KEY, out NSObject rsrcObj))
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throw new Exception("Could not retrieve resource fork.");
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NSDictionary rsrc = (NSDictionary)rsrcObj;
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if(!rsrc.TryGetValue(BLOCK_KEY, out NSObject blkxObj))
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throw new Exception("Could not retrieve block chunks array.");
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NSObject[] blkx = ((NSArray)blkxObj).GetArray();
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foreach(NSDictionary part in blkx.Cast<NSDictionary>())
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{
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if(!part.TryGetValue("Name", out _)) throw new Exception("Could not retrieve Name");
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if(!part.TryGetValue("Data", out NSObject dataObj)) throw new Exception("Could not retrieve Data");
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blkxList.Add(((NSData)dataObj).Bytes);
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}
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if(rsrc.TryGetValue("vers", out NSObject versObj))
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{
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NSObject[] versArray = ((NSArray)versObj).GetArray();
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if(versArray.Length >= 1) vers = ((NSData)versArray[0]).Bytes;
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}
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}
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else
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{
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// Obsolete read-only UDIF only prepended the header and then put the image without any kind of block references.
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// So let's falsify a block chunk
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BlockChunk bChnk = new BlockChunk
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{
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length = footer.dataForkLen,
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offset = footer.dataForkOff,
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sector = 0,
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sectors = footer.sectorCount,
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type = CHUNK_TYPE_COPY
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};
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imageInfo.Sectors = footer.sectorCount;
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chunks.Add(bChnk.sector, bChnk);
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buffersize = 2048 * SECTOR_SIZE;
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fakeBlockChunks = true;
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}
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if(vers != null)
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{
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Version version = new Version(vers);
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string release = null;
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string dev = null;
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string pre = null;
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string major = $"{version.MajorVersion}";
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string minor = $".{version.MinorVersion / 10}";
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if(version.MinorVersion % 10 > 0) release = $".{version.MinorVersion % 10}";
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switch(version.DevStage)
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{
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case Version.DevelopmentStage.Alpha:
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dev = "a";
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break;
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case Version.DevelopmentStage.Beta:
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dev = "b";
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break;
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case Version.DevelopmentStage.PreAlpha:
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dev = "d";
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break;
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}
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if(dev == null && version.PreReleaseVersion > 0) dev = "f";
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if(dev != null) pre = $"{version.PreReleaseVersion}";
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imageInfo.ApplicationVersion = $"{major}{minor}{release}{dev}{pre}";
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imageInfo.Application = version.VersionString;
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imageInfo.Comments = version.VersionMessage;
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if(version.MajorVersion == 3) imageInfo.Application = "ShrinkWrap™";
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else if(version.MajorVersion == 6) imageInfo.Application = "DiskCopy";
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}
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else imageInfo.Application = "DiskCopy";
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DicConsole.DebugWriteLine("UDIF plugin", "Image application = {0} version {1}", imageInfo.Application,
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imageInfo.ApplicationVersion);
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imageInfo.Sectors = 0;
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if(!fakeBlockChunks)
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{
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if(blkxList.Count == 0)
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throw new
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ImageNotSupportedException("Could not retrieve block chunks. Please fill an issue and send it to us.");
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buffersize = 0;
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foreach(byte[] blkxBytes in blkxList)
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{
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BlockHeader bHdr = new BlockHeader();
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byte[] bHdrB = new byte[Marshal.SizeOf(bHdr)];
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Array.Copy(blkxBytes, 0, bHdrB, 0, Marshal.SizeOf(bHdr));
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bHdr = BigEndianMarshal.ByteArrayToStructureBigEndian<BlockHeader>(bHdrB);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.signature = 0x{0:X8}", bHdr.signature);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.version = {0}", bHdr.version);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.sectorStart = {0}", bHdr.sectorStart);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.sectorCount = {0}", bHdr.sectorCount);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.dataOffset = {0}", bHdr.dataOffset);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.buffers = {0}", bHdr.buffers);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.descriptor = 0x{0:X8}", bHdr.descriptor);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved1 = {0}", bHdr.reserved1);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved2 = {0}", bHdr.reserved2);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved3 = {0}", bHdr.reserved3);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved4 = {0}", bHdr.reserved4);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved5 = {0}", bHdr.reserved5);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved6 = {0}", bHdr.reserved6);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.checksumType = {0}", bHdr.checksumType);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.checksumLen = {0}", bHdr.checksumLen);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.checksum = 0x{0:X8}", bHdr.checksum);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunks = {0}", bHdr.chunks);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reservedChk is empty? = {0}",
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ArrayHelpers.ArrayIsNullOrEmpty(bHdr.reservedChk));
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if(bHdr.buffers > buffersize) buffersize = bHdr.buffers * SECTOR_SIZE;
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for(int i = 0; i < bHdr.chunks; i++)
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{
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BlockChunk bChnk = new BlockChunk();
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byte[] bChnkB = new byte[Marshal.SizeOf(bChnk)];
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Array.Copy(blkxBytes, Marshal.SizeOf(bHdr) + Marshal.SizeOf(bChnk) * i, bChnkB, 0,
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Marshal.SizeOf(bChnk));
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bChnk = BigEndianMarshal.ByteArrayToStructureBigEndian<BlockChunk>(bChnkB);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].type = 0x{1:X8}", i, bChnk.type);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].comment = {1}", i, bChnk.comment);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].sector = {1}", i, bChnk.sector);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].sectors = {1}", i, bChnk.sectors);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].offset = {1}", i, bChnk.offset);
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DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].length = {1}", i, bChnk.length);
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if(bChnk.type == CHUNK_TYPE_END) break;
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imageInfo.Sectors += bChnk.sectors;
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// Chunk offset is relative
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bChnk.sector += bHdr.sectorStart;
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bChnk.offset += bHdr.dataOffset;
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switch(bChnk.type)
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{
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// TODO: Handle comments
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case CHUNK_TYPE_COMMNT: continue;
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// TODO: Handle compressed chunks
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case CHUNK_TYPE_KENCODE:
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throw new
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ImageNotSupportedException("Chunks compressed with KenCode are not yet supported.");
|
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case CHUNK_TYPE_LZH:
|
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throw new
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ImageNotSupportedException("Chunks compressed with LZH are not yet supported.");
|
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case CHUNK_TYPE_LZFSE:
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throw new
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ImageNotSupportedException("Chunks compressed with lzfse are not yet supported.");
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}
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if(bChnk.type > CHUNK_TYPE_NOCOPY && bChnk.type < CHUNK_TYPE_COMMNT ||
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bChnk.type > CHUNK_TYPE_LZFSE && bChnk.type < CHUNK_TYPE_END)
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throw new ImageNotSupportedException($"Unsupported chunk type 0x{bChnk.type:X8} found");
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if(bChnk.sectors > 0) chunks.Add(bChnk.sector, bChnk);
|
||||
}
|
||||
}
|
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}
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|
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sectorCache = new Dictionary<ulong, byte[]>();
|
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chunkCache = new Dictionary<ulong, byte[]>();
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currentChunkCacheSize = 0;
|
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imageStream = stream;
|
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|
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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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imageInfo.SectorSize = SECTOR_SIZE;
|
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imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
|
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imageInfo.MediaType = MediaType.GENERIC_HDD;
|
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imageInfo.ImageSize = imageInfo.Sectors * SECTOR_SIZE;
|
||||
imageInfo.Version = $"{footer.version}";
|
||||
|
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imageInfo.Cylinders = (uint)(imageInfo.Sectors / 16 / 63);
|
||||
imageInfo.Heads = 16;
|
||||
imageInfo.SectorsPerTrack = 63;
|
||||
|
||||
return true;
|
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}
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||||
|
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public byte[] ReadSector(ulong sectorAddress)
|
||||
{
|
||||
if(sectorAddress > imageInfo.Sectors - 1)
|
||||
throw new ArgumentOutOfRangeException(nameof(sectorAddress),
|
||||
$"Sector address {sectorAddress} not found");
|
||||
|
||||
if(sectorCache.TryGetValue(sectorAddress, out byte[] sector)) return sector;
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||||
|
||||
BlockChunk readChunk = new BlockChunk();
|
||||
bool chunkFound = false;
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ulong chunkStartSector = 0;
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||||
|
||||
foreach(KeyValuePair<ulong, BlockChunk> kvp in chunks.Where(kvp => sectorAddress >= kvp.Key))
|
||||
{
|
||||
readChunk = kvp.Value;
|
||||
chunkFound = true;
|
||||
chunkStartSector = kvp.Key;
|
||||
}
|
||||
|
||||
long relOff = ((long)sectorAddress - (long)chunkStartSector) * SECTOR_SIZE;
|
||||
|
||||
if(relOff < 0)
|
||||
throw new ArgumentOutOfRangeException(nameof(relOff),
|
||||
$"Got a negative offset for sector {sectorAddress}. This should not happen.");
|
||||
|
||||
if(!chunkFound)
|
||||
throw new ArgumentOutOfRangeException(nameof(sectorAddress),
|
||||
$"Sector address {sectorAddress} not found");
|
||||
|
||||
if((readChunk.type & CHUNK_TYPE_COMPRESSED_MASK) == CHUNK_TYPE_COMPRESSED_MASK)
|
||||
{
|
||||
if(!chunkCache.TryGetValue(chunkStartSector, out byte[] buffer))
|
||||
{
|
||||
byte[] cmpBuffer = new byte[readChunk.length];
|
||||
imageStream.Seek((long)readChunk.offset, SeekOrigin.Begin);
|
||||
imageStream.Read(cmpBuffer, 0, cmpBuffer.Length);
|
||||
MemoryStream cmpMs = new MemoryStream(cmpBuffer);
|
||||
Stream decStream = null;
|
||||
|
||||
switch(readChunk.type)
|
||||
{
|
||||
case CHUNK_TYPE_ADC:
|
||||
decStream = new ADCStream(cmpMs);
|
||||
break;
|
||||
case CHUNK_TYPE_ZLIB:
|
||||
decStream = new ZlibStream(cmpMs, CompressionMode.Decompress);
|
||||
break;
|
||||
case CHUNK_TYPE_BZIP:
|
||||
decStream = new BZip2Stream(cmpMs, SharpCompress.Compressors.CompressionMode.Decompress);
|
||||
break;
|
||||
case CHUNK_TYPE_RLE: break;
|
||||
default:
|
||||
throw new ImageNotSupportedException($"Unsupported chunk type 0x{readChunk.type:X8} found");
|
||||
}
|
||||
|
||||
#if DEBUG
|
||||
try
|
||||
{
|
||||
#endif
|
||||
byte[] tmpBuffer;
|
||||
int realSize;
|
||||
switch(readChunk.type)
|
||||
{
|
||||
case CHUNK_TYPE_ADC:
|
||||
case CHUNK_TYPE_ZLIB:
|
||||
case CHUNK_TYPE_BZIP:
|
||||
tmpBuffer = new byte[buffersize];
|
||||
realSize = decStream.Read(tmpBuffer, 0, (int)buffersize);
|
||||
buffer = new byte[realSize];
|
||||
Array.Copy(tmpBuffer, 0, buffer, 0, realSize);
|
||||
|
||||
if(currentChunkCacheSize + realSize > MAX_CACHE_SIZE)
|
||||
{
|
||||
chunkCache.Clear();
|
||||
currentChunkCacheSize = 0;
|
||||
}
|
||||
|
||||
chunkCache.Add(chunkStartSector, buffer);
|
||||
currentChunkCacheSize += (uint)realSize;
|
||||
break;
|
||||
case CHUNK_TYPE_RLE:
|
||||
tmpBuffer = new byte[buffersize];
|
||||
realSize = 0;
|
||||
AppleRle rle = new AppleRle(cmpMs);
|
||||
for(int i = 0; i < buffersize; i++)
|
||||
{
|
||||
int b = rle.ProduceByte();
|
||||
if(b == -1) break;
|
||||
|
||||
tmpBuffer[i] = (byte)b;
|
||||
realSize++;
|
||||
}
|
||||
|
||||
buffer = new byte[realSize];
|
||||
Array.Copy(tmpBuffer, 0, buffer, 0, realSize);
|
||||
break;
|
||||
}
|
||||
#if DEBUG
|
||||
}
|
||||
catch(ZlibException)
|
||||
{
|
||||
DicConsole.WriteLine("zlib exception on chunk starting at sector {0}", readChunk.sector);
|
||||
throw;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
sector = new byte[SECTOR_SIZE];
|
||||
Array.Copy(buffer, relOff, sector, 0, SECTOR_SIZE);
|
||||
|
||||
if(sectorCache.Count >= MAX_CACHED_SECTORS) sectorCache.Clear();
|
||||
|
||||
sectorCache.Add(sectorAddress, sector);
|
||||
|
||||
return sector;
|
||||
}
|
||||
|
||||
switch(readChunk.type)
|
||||
{
|
||||
case CHUNK_TYPE_NOCOPY:
|
||||
case CHUNK_TYPE_ZERO:
|
||||
sector = new byte[SECTOR_SIZE];
|
||||
|
||||
if(sectorCache.Count >= MAX_CACHED_SECTORS) sectorCache.Clear();
|
||||
|
||||
sectorCache.Add(sectorAddress, sector);
|
||||
return sector;
|
||||
case CHUNK_TYPE_COPY:
|
||||
imageStream.Seek((long)readChunk.offset + relOff, SeekOrigin.Begin);
|
||||
sector = new byte[SECTOR_SIZE];
|
||||
imageStream.Read(sector, 0, sector.Length);
|
||||
|
||||
if(sectorCache.Count >= MAX_CACHED_SECTORS) sectorCache.Clear();
|
||||
|
||||
sectorCache.Add(sectorAddress, sector);
|
||||
return sector;
|
||||
}
|
||||
|
||||
throw new ImageNotSupportedException($"Unsupported chunk type 0x{readChunk.type:X8} found");
|
||||
}
|
||||
|
||||
public byte[] ReadSectors(ulong sectorAddress, uint length)
|
||||
{
|
||||
if(sectorAddress > imageInfo.Sectors - 1)
|
||||
throw new ArgumentOutOfRangeException(nameof(sectorAddress),
|
||||
$"Sector address {sectorAddress} not found");
|
||||
|
||||
if(sectorAddress + length > imageInfo.Sectors)
|
||||
throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");
|
||||
|
||||
MemoryStream ms = new MemoryStream();
|
||||
|
||||
for(uint i = 0; i < length; i++)
|
||||
{
|
||||
byte[] sector = ReadSector(sectorAddress + i);
|
||||
ms.Write(sector, 0, sector.Length);
|
||||
}
|
||||
|
||||
return ms.ToArray();
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user