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https://github.com/aaru-dps/Aaru.git
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471 lines
22 KiB
C#
471 lines
22 KiB
C#
// /***************************************************************************
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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 DiskCopy 4.2 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 © 2011-2019 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.IO;
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using System.Text.RegularExpressions;
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using Claunia.Encoding;
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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.Console;
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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 DiskCopy42
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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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byte[] buffer = new byte[0x58];
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byte[] pString = new byte[64];
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stream.Read(buffer, 0, 0x58);
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IsWriting = false;
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// Incorrect pascal string length, not DC42
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if(buffer[0] > 63) return false;
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header = new Dc42Header();
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BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
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Array.Copy(buffer, 0, pString, 0, 64);
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header.DiskName = StringHandlers.PascalToString(pString, Encoding.GetEncoding("macintosh"));
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header.DataSize = BigEndianBitConverter.ToUInt32(buffer, 0x40);
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header.TagSize = BigEndianBitConverter.ToUInt32(buffer, 0x44);
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header.DataChecksum = BigEndianBitConverter.ToUInt32(buffer, 0x48);
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header.TagChecksum = BigEndianBitConverter.ToUInt32(buffer, 0x4C);
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header.Format = buffer[0x50];
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header.FmtByte = buffer[0x51];
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header.Valid = buffer[0x52];
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header.Reserved = buffer[0x53];
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DicConsole.DebugWriteLine("DC42 plugin", "header.diskName = \"{0}\"", header.DiskName);
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DicConsole.DebugWriteLine("DC42 plugin", "header.dataSize = {0} bytes", header.DataSize);
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DicConsole.DebugWriteLine("DC42 plugin", "header.tagSize = {0} bytes", header.TagSize);
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DicConsole.DebugWriteLine("DC42 plugin", "header.dataChecksum = 0x{0:X8}", header.DataChecksum);
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DicConsole.DebugWriteLine("DC42 plugin", "header.tagChecksum = 0x{0:X8}", header.TagChecksum);
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DicConsole.DebugWriteLine("DC42 plugin", "header.format = 0x{0:X2}", header.Format);
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DicConsole.DebugWriteLine("DC42 plugin", "header.fmtByte = 0x{0:X2}", header.FmtByte);
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DicConsole.DebugWriteLine("DC42 plugin", "header.valid = {0}", header.Valid);
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DicConsole.DebugWriteLine("DC42 plugin", "header.reserved = {0}", header.Reserved);
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if(header.Valid != 1 || header.Reserved != 0) return false;
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// Some versions seem to incorrectly create little endian fields
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if(header.DataSize + header.TagSize + 0x54 != imageFilter.GetDataForkLength() &&
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header.Format != kSigmaFormatTwiggy)
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{
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header.DataSize = BitConverter.ToUInt32(buffer, 0x40);
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header.TagSize = BitConverter.ToUInt32(buffer, 0x44);
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header.DataChecksum = BitConverter.ToUInt32(buffer, 0x48);
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header.TagChecksum = BitConverter.ToUInt32(buffer, 0x4C);
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if(header.DataSize + header.TagSize + 0x54 != imageFilter.GetDataForkLength() &&
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header.Format != kSigmaFormatTwiggy) return false;
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}
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if(header.Format != kSonyFormat400K && header.Format != kSonyFormat800K &&
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header.Format != kSonyFormat720K && header.Format != kSonyFormat1440K &&
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header.Format != kSonyFormat1680K && header.Format != kSigmaFormatTwiggy &&
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header.Format != kNotStandardFormat)
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{
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DicConsole.DebugWriteLine("DC42 plugin", "Unknown header.format = 0x{0:X2} value", header.Format);
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return false;
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}
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if(header.FmtByte != kSonyFmtByte400K && header.FmtByte != kSonyFmtByte800K &&
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header.FmtByte != kSonyFmtByte800KIncorrect && header.FmtByte != kSonyFmtByteProDos &&
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header.FmtByte != kInvalidFmtByte && header.FmtByte != kSigmaFmtByteTwiggy &&
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header.FmtByte != kFmtNotStandard && header.FmtByte != kMacOSXFmtByte)
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{
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DicConsole.DebugWriteLine("DC42 plugin", "Unknown tmp_header.fmtByte = 0x{0:X2} value", header.FmtByte);
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return false;
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}
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if(header.FmtByte == kInvalidFmtByte)
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{
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DicConsole.DebugWriteLine("DC42 plugin", "Image says it's unformatted");
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return false;
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}
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dataOffset = 0x54;
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tagOffset = header.TagSize != 0 ? 0x54 + header.DataSize : 0;
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imageInfo.SectorSize = 512;
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bptag = (uint)(header.TagSize != 0 ? 12 : 0);
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dc42ImageFilter = imageFilter;
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imageInfo.Sectors = header.DataSize / 512;
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if(header.TagSize != 0)
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{
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bptag = (uint)(header.TagSize / imageInfo.Sectors);
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DicConsole.DebugWriteLine("DC42 plugin", "bptag = {0} bytes", bptag);
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if(bptag != 12 && bptag != 20 && bptag != 24)
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{
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DicConsole.DebugWriteLine("DC42 plugin", "Unknown tag size");
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return false;
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}
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imageInfo.ReadableSectorTags.Add(SectorTagType.AppleSectorTag);
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}
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imageInfo.ImageSize = imageInfo.Sectors * imageInfo.SectorSize + imageInfo.Sectors * bptag;
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imageInfo.CreationTime = imageFilter.GetCreationTime();
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imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
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imageInfo.MediaTitle = header.DiskName;
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switch(header.Format)
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{
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case kSonyFormat400K:
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imageInfo.MediaType = imageInfo.Sectors == 1600 ? MediaType.AppleSonyDS : MediaType.AppleSonySS;
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break;
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case kSonyFormat800K:
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imageInfo.MediaType = MediaType.AppleSonyDS;
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break;
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case kSonyFormat720K:
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imageInfo.MediaType = MediaType.DOS_35_DS_DD_9;
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break;
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case kSonyFormat1440K:
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imageInfo.MediaType = MediaType.DOS_35_HD;
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break;
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case kSonyFormat1680K:
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imageInfo.MediaType = MediaType.DMF;
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break;
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case kSigmaFormatTwiggy:
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imageInfo.MediaType = MediaType.AppleFileWare;
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break;
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case kNotStandardFormat:
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switch(imageInfo.Sectors)
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{
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case 9728:
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imageInfo.MediaType = MediaType.AppleProfile;
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break;
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case 19456:
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imageInfo.MediaType = MediaType.AppleProfile;
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break;
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case 38912:
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imageInfo.MediaType = MediaType.AppleWidget;
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break;
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case 39040:
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imageInfo.MediaType = MediaType.AppleHD20;
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break;
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default:
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imageInfo.MediaType = MediaType.Unknown;
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break;
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}
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break;
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default:
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imageInfo.MediaType = MediaType.Unknown;
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break;
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}
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if(imageInfo.MediaType == MediaType.AppleFileWare)
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{
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byte[] data = new byte[header.DataSize];
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byte[] tags = new byte[header.TagSize];
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twiggyCache = new byte[header.DataSize];
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twiggyCacheTags = new byte[header.TagSize];
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twiggy = true;
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Stream datastream = imageFilter.GetDataForkStream();
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datastream.Seek(dataOffset, SeekOrigin.Begin);
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datastream.Read(data, 0, (int)header.DataSize);
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Stream tagstream = imageFilter.GetDataForkStream();
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tagstream.Seek(tagOffset, SeekOrigin.Begin);
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tagstream.Read(tags, 0, (int)header.TagSize);
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ushort mfsMagic = BigEndianBitConverter.ToUInt16(data, data.Length / 2 + 0x400);
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ushort mfsAllBlocks = BigEndianBitConverter.ToUInt16(data, data.Length / 2 + 0x412);
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// Detect a Macintosh Twiggy
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if(mfsMagic == 0xD2D7 && mfsAllBlocks == 422)
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{
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DicConsole.DebugWriteLine("DC42 plugin", "Macintosh Twiggy detected, reversing disk sides");
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Array.Copy(data, header.DataSize / 2, twiggyCache, 0, header.DataSize / 2);
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Array.Copy(tags, header.TagSize / 2, twiggyCacheTags, 0, header.TagSize / 2);
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Array.Copy(data, 0, twiggyCache, header.DataSize / 2, header.DataSize / 2);
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Array.Copy(tags, 0, twiggyCacheTags, header.TagSize / 2, header.TagSize / 2);
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}
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else
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{
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DicConsole.DebugWriteLine("DC42 plugin", "Lisa Twiggy detected, reversing second half of disk");
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Array.Copy(data, 0, twiggyCache, 0, header.DataSize / 2);
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Array.Copy(tags, 0, twiggyCacheTags, 0, header.TagSize / 2);
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int copiedSectors = 0;
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int sectorsToCopy = 0;
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for(int i = 0; i < 46; i++)
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{
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if(i >= 0 && i <= 3) sectorsToCopy = 22;
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if(i >= 4 && i <= 10) sectorsToCopy = 21;
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if(i >= 11 && i <= 16) sectorsToCopy = 20;
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if(i >= 17 && i <= 22) sectorsToCopy = 19;
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if(i >= 23 && i <= 28) sectorsToCopy = 18;
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if(i >= 29 && i <= 34) sectorsToCopy = 17;
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if(i >= 35 && i <= 41) sectorsToCopy = 16;
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if(i >= 42 && i <= 45) sectorsToCopy = 15;
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Array.Copy(data, header.DataSize / 2 + copiedSectors * 512, twiggyCache,
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twiggyCache.Length - copiedSectors * 512 - sectorsToCopy * 512, sectorsToCopy * 512);
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Array.Copy(tags, header.TagSize / 2 + copiedSectors * bptag,
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twiggyCacheTags,
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twiggyCacheTags.Length - copiedSectors * bptag - sectorsToCopy * bptag,
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sectorsToCopy * bptag);
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copiedSectors += sectorsToCopy;
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}
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}
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}
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try
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{
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if(imageFilter.HasResourceFork())
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{
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ResourceFork rsrcFork = new ResourceFork(imageFilter.GetResourceForkStream());
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if(rsrcFork.ContainsKey(0x76657273))
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{
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Resource versRsrc = rsrcFork.GetResource(0x76657273);
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byte[] vers = versRsrc?.GetResource(versRsrc.GetIds()[0]);
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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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}
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}
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if(rsrcFork.ContainsKey(0x64437079))
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{
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Resource dCpyRsrc = rsrcFork.GetResource(0x64437079);
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if(dCpyRsrc != null)
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{
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string dCpy = StringHandlers.PascalToString(dCpyRsrc.GetResource(dCpyRsrc.GetIds()[0]),
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Encoding.GetEncoding("macintosh"));
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Regex dCpyEx = new Regex(REGEX_DCPY);
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Match dCpyMatch = dCpyEx.Match(dCpy);
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if(dCpyMatch.Success)
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{
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imageInfo.Application = dCpyMatch.Groups["application"].Value;
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imageInfo.ApplicationVersion = dCpyMatch.Groups["version"].Value;
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}
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}
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}
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}
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}
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catch(InvalidCastException) { }
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DicConsole.DebugWriteLine("DC42 plugin", "Image application = {0} version {1}", imageInfo.Application,
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imageInfo.ApplicationVersion);
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imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
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DicConsole.VerboseWriteLine("DiskCopy 4.2 image contains a disk of type {0}", imageInfo.MediaType);
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switch(imageInfo.MediaType)
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{
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case MediaType.AppleSonySS:
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imageInfo.Cylinders = 80;
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imageInfo.Heads = 1;
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imageInfo.SectorsPerTrack = 10;
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break;
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case MediaType.AppleSonyDS:
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imageInfo.Cylinders = 80;
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imageInfo.Heads = 2;
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imageInfo.SectorsPerTrack = 10;
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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.DMF:
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imageInfo.Cylinders = 80;
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imageInfo.Heads = 2;
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imageInfo.SectorsPerTrack = 21;
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break;
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case MediaType.AppleProfile:
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switch(imageInfo.Sectors)
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{
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case 9728:
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imageInfo.Cylinders = 152;
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break;
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case 19456:
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imageInfo.Cylinders = 304;
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break;
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}
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imageInfo.Heads = 4;
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imageInfo.SectorsPerTrack = 16;
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break;
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case MediaType.AppleWidget:
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imageInfo.Cylinders = 608;
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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.AppleHD20:
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imageInfo.Cylinders = 610;
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imageInfo.Heads = 2;
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imageInfo.SectorsPerTrack = 16;
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break;
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default:
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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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return true;
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}
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public byte[] ReadSector(ulong sectorAddress) => ReadSectors(sectorAddress, 1);
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public byte[] ReadSectorTag(ulong sectorAddress, SectorTagType tag) => ReadSectorsTag(sectorAddress, 1, tag);
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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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byte[] buffer = new byte[length * imageInfo.SectorSize];
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if(twiggy)
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Array.Copy(twiggyCache, (int)sectorAddress * imageInfo.SectorSize, buffer, 0,
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length * imageInfo.SectorSize);
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else
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{
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Stream stream = dc42ImageFilter.GetDataForkStream();
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stream.Seek((long)(dataOffset + sectorAddress * imageInfo.SectorSize), SeekOrigin.Begin);
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stream.Read(buffer, 0, (int)(length * imageInfo.SectorSize));
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}
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return buffer;
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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(header.TagSize == 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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byte[] buffer = new byte[length * bptag];
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if(twiggy) Array.Copy(twiggyCacheTags, (int)sectorAddress * bptag, buffer, 0, length * bptag);
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else
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{
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Stream stream = dc42ImageFilter.GetDataForkStream();
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stream.Seek((long)(tagOffset + sectorAddress * bptag), SeekOrigin.Begin);
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stream.Read(buffer, 0, (int)(length * bptag));
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}
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return buffer;
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}
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public byte[] ReadSectorLong(ulong sectorAddress) => ReadSectorsLong(sectorAddress, 1);
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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[] data = ReadSectors(sectorAddress, length);
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byte[] tags = ReadSectorsTag(sectorAddress, length, SectorTagType.AppleSectorTag);
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byte[] buffer = new byte[data.Length + tags.Length];
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for(uint i = 0; i < length; i++)
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{
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Array.Copy(data, i * imageInfo.SectorSize, buffer, i * (imageInfo.SectorSize + bptag),
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imageInfo.SectorSize);
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Array.Copy(tags, i * bptag, buffer, i * (imageInfo.SectorSize + bptag) + imageInfo.SectorSize, bptag);
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}
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return buffer;
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}
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}
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} |