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581 lines
29 KiB
C#
581 lines
29 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 Sydex TeleDisk 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 System.Text;
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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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namespace DiscImageChef.DiscImages
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{
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public partial class TeleDisk
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{
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public bool Open(IFilter imageFilter)
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{
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header = new TeleDiskHeader();
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byte[] headerBytes = new byte[12];
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inStream = imageFilter.GetDataForkStream();
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MemoryStream stream = new MemoryStream();
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inStream.Seek(0, SeekOrigin.Begin);
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inStream.Read(headerBytes, 0, 12);
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stream.Write(headerBytes, 0, 12);
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header.Signature = BitConverter.ToUInt16(headerBytes, 0);
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if(header.Signature != TD_MAGIC && header.Signature != TD_ADV_COMP_MAGIC) return false;
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header.Sequence = headerBytes[2];
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header.DiskSet = headerBytes[3];
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header.Version = headerBytes[4];
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header.DataRate = headerBytes[5];
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header.DriveType = headerBytes[6];
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header.Stepping = headerBytes[7];
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header.DosAllocation = headerBytes[8];
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header.Sides = headerBytes[9];
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header.Crc = BitConverter.ToUInt16(headerBytes, 10);
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imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
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imageInfo.Version = $"{(header.Version & 0xF0) >> 4}.{header.Version & 0x0F}";
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imageInfo.Application = imageInfo.Version;
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byte[] headerBytesForCrc = new byte[10];
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Array.Copy(headerBytes, headerBytesForCrc, 10);
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ushort calculatedHeaderCrc = TeleDiskCrc(0x0000, headerBytesForCrc);
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DicConsole.DebugWriteLine("TeleDisk plugin", "header.signature = 0x{0:X4}", header.Signature);
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DicConsole.DebugWriteLine("TeleDisk plugin", "header.sequence = 0x{0:X2}", header.Sequence);
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DicConsole.DebugWriteLine("TeleDisk plugin", "header.diskSet = 0x{0:X2}", header.DiskSet);
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DicConsole.DebugWriteLine("TeleDisk plugin", "header.version = 0x{0:X2}", header.Version);
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DicConsole.DebugWriteLine("TeleDisk plugin", "header.dataRate = 0x{0:X2}", header.DataRate);
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DicConsole.DebugWriteLine("TeleDisk plugin", "header.driveType = 0x{0:X2}", header.DriveType);
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DicConsole.DebugWriteLine("TeleDisk plugin", "header.stepping = 0x{0:X2}", header.Stepping);
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DicConsole.DebugWriteLine("TeleDisk plugin", "header.dosAllocation = 0x{0:X2}", header.DosAllocation);
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DicConsole.DebugWriteLine("TeleDisk plugin", "header.sides = 0x{0:X2}", header.Sides);
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DicConsole.DebugWriteLine("TeleDisk plugin", "header.crc = 0x{0:X4}", header.Crc);
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DicConsole.DebugWriteLine("TeleDisk plugin", "calculated header crc = 0x{0:X4}", calculatedHeaderCrc);
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// We need more checks as the magic is too simply.
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// This may deny legal images
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// That would be much of a coincidence
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if(header.Crc != calculatedHeaderCrc)
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{
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aDiskCrcHasFailed = true;
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DicConsole.DebugWriteLine("TeleDisk plugin", "Calculated CRC does not coincide with stored one.");
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}
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if(header.Sequence != 0x00) return false;
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if(header.DataRate != DATA_RATE_250KBPS && header.DataRate != DATA_RATE_300KBPS &&
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header.DataRate != DATA_RATE_500KBPS) return false;
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if(header.DriveType != DRIVE_TYPE_35_DD && header.DriveType != DRIVE_TYPE_35_ED &&
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header.DriveType != DRIVE_TYPE_35_HD && header.DriveType != DRIVE_TYPE_525_DD &&
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header.DriveType != DRIVE_TYPE_525_HD && header.DriveType != DRIVE_TYPE_525_HD_DD_DISK &&
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header.DriveType != DRIVE_TYPE_8_INCH) return false;
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if(header.Signature == TD_ADV_COMP_MAGIC)
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{
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int rd;
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inStream.Seek(12, SeekOrigin.Begin);
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stream.Seek(12, SeekOrigin.Begin);
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TeleDiskLzh lzh = new TeleDiskLzh(inStream);
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do
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if((rd = lzh.Decode(out byte[] obuf, BUFSZ)) > 0)
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stream.Write(obuf, 0, rd);
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while(rd == BUFSZ);
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}
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else
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{
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// Not using Stream.CopyTo() because it's failing with LZIP
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byte[] copybuf = new byte[inStream.Length];
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inStream.Seek(0, SeekOrigin.Begin);
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inStream.Read(copybuf, 0, copybuf.Length);
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stream.Seek(0, SeekOrigin.Begin);
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stream.Write(copybuf, 0, copybuf.Length);
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}
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stream.Seek(12, SeekOrigin.Begin);
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imageInfo.CreationTime = DateTime.MinValue;
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if((header.Stepping & COMMENT_BLOCK_PRESENT) == COMMENT_BLOCK_PRESENT)
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{
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commentHeader = new TeleDiskCommentBlockHeader();
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byte[] commentHeaderBytes = new byte[10];
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stream.Read(commentHeaderBytes, 0, 10);
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commentHeader.Crc = BitConverter.ToUInt16(commentHeaderBytes, 0);
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commentHeader.Length = BitConverter.ToUInt16(commentHeaderBytes, 2);
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commentHeader.Year = commentHeaderBytes[4];
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commentHeader.Month = commentHeaderBytes[5];
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commentHeader.Day = commentHeaderBytes[6];
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commentHeader.Hour = commentHeaderBytes[7];
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commentHeader.Minute = commentHeaderBytes[8];
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commentHeader.Second = commentHeaderBytes[9];
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commentBlock = new byte[commentHeader.Length];
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stream.Read(commentBlock, 0, commentHeader.Length);
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byte[] commentBlockForCrc = new byte[commentHeader.Length + 8];
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Array.Copy(commentHeaderBytes, 2, commentBlockForCrc, 0, 8);
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Array.Copy(commentBlock, 0, commentBlockForCrc, 8, commentHeader.Length);
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ushort cmtcrc = TeleDiskCrc(0, commentBlockForCrc);
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DicConsole.DebugWriteLine("TeleDisk plugin", "Comment header");
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tcommentheader.crc = 0x{0:X4}", commentHeader.Crc);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tCalculated CRC = 0x{0:X4}", cmtcrc);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tcommentheader.length = {0} bytes",
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commentHeader.Length);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tcommentheader.year = {0}", commentHeader.Year);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tcommentheader.month = {0}", commentHeader.Month);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tcommentheader.day = {0}", commentHeader.Day);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tcommentheader.hour = {0}", commentHeader.Hour);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tcommentheader.minute = {0}", commentHeader.Minute);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tcommentheader.second = {0}", commentHeader.Second);
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aDiskCrcHasFailed |= cmtcrc != commentHeader.Crc;
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for(int i = 0; i < commentBlock.Length; i++)
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// Replace NULLs, used by TeleDisk as newline markers, with UNIX newline marker
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if(commentBlock[i] == 0x00)
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commentBlock[i] = 0x0A;
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imageInfo.Comments = Encoding.ASCII.GetString(commentBlock);
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DicConsole.DebugWriteLine("TeleDisk plugin", "Comment");
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DicConsole.DebugWriteLine("TeleDisk plugin", "{0}", imageInfo.Comments);
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imageInfo.CreationTime = new DateTime(commentHeader.Year + 1900, commentHeader.Month + 1,
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commentHeader.Day, commentHeader.Hour, commentHeader.Minute,
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commentHeader.Second, DateTimeKind.Unspecified);
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}
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if(imageInfo.CreationTime == DateTime.MinValue) imageInfo.CreationTime = imageFilter.GetCreationTime();
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imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
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DicConsole.DebugWriteLine("TeleDisk plugin", "Image created on {0}", imageInfo.CreationTime);
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DicConsole.DebugWriteLine("TeleDisk plugin", "Image modified on {0}", imageInfo.LastModificationTime);
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DicConsole.DebugWriteLine("TeleDisk plugin", "Parsing image");
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totalDiskSize = 0;
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imageInfo.ImageSize = 0;
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int totalCylinders = -1;
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int totalHeads = -1;
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int maxSector = -1;
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int totalSectors = 0;
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long currentPos = stream.Position;
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imageInfo.SectorSize = uint.MaxValue;
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imageInfo.SectorsPerTrack = uint.MaxValue;
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// Count cylinders
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while(true)
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{
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TeleDiskTrackHeader teleDiskTrack = new TeleDiskTrackHeader
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{
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Sectors = (byte)stream.ReadByte(),
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Cylinder = (byte)stream.ReadByte(),
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Head = (byte)stream.ReadByte(),
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Crc = (byte)stream.ReadByte()
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};
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if(teleDiskTrack.Cylinder > totalCylinders) totalCylinders = teleDiskTrack.Cylinder;
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if(teleDiskTrack.Head > totalHeads) totalHeads = teleDiskTrack.Head;
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if(teleDiskTrack.Sectors == 0xFF) // End of disk image
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break;
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for(byte processedSectors = 0; processedSectors < teleDiskTrack.Sectors; processedSectors++)
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{
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TeleDiskSectorHeader teleDiskSector = new TeleDiskSectorHeader();
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TeleDiskDataHeader teleDiskData = new TeleDiskDataHeader();
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byte[] dataSizeBytes = new byte[2];
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teleDiskSector.Cylinder = (byte)stream.ReadByte();
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teleDiskSector.Head = (byte)stream.ReadByte();
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teleDiskSector.SectorNumber = (byte)stream.ReadByte();
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teleDiskSector.SectorSize = (byte)stream.ReadByte();
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teleDiskSector.Flags = (byte)stream.ReadByte();
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teleDiskSector.Crc = (byte)stream.ReadByte();
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if(teleDiskSector.SectorNumber > maxSector) maxSector = teleDiskSector.SectorNumber;
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if((teleDiskSector.Flags & FLAGS_SECTOR_DATALESS) != FLAGS_SECTOR_DATALESS &&
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(teleDiskSector.Flags & FLAGS_SECTOR_SKIPPED) != FLAGS_SECTOR_SKIPPED)
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{
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stream.Read(dataSizeBytes, 0, 2);
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teleDiskData.DataSize = BitConverter.ToUInt16(dataSizeBytes, 0);
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teleDiskData.DataSize--; // Sydex decided to including dataEncoding byte as part of it
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teleDiskData.DataEncoding = (byte)stream.ReadByte();
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byte[] data = new byte[teleDiskData.DataSize];
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stream.Read(data, 0, teleDiskData.DataSize);
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}
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if(128 << teleDiskSector.SectorSize < imageInfo.SectorSize)
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imageInfo.SectorSize = (uint)(128 << teleDiskSector.SectorSize);
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totalSectors++;
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}
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}
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totalCylinders++;
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totalHeads++;
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if(totalCylinders <= 0 || totalHeads <= 0)
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throw new ImageNotSupportedException("No cylinders or heads found");
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bool hasLeadOutOnHead0 = false;
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bool hasLeadOutOnHead1 = false;
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imageInfo.Cylinders = (ushort)totalCylinders;
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imageInfo.Heads = (byte)totalHeads;
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// Count sectors per track
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stream.Seek(currentPos, SeekOrigin.Begin);
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while(true)
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{
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TeleDiskTrackHeader teleDiskTrack = new TeleDiskTrackHeader
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{
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Sectors = (byte)stream.ReadByte(),
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Cylinder = (byte)stream.ReadByte(),
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Head = (byte)stream.ReadByte(),
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Crc = (byte)stream.ReadByte()
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};
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if(teleDiskTrack.Sectors == 0xFF) // End of disk image
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break;
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if(teleDiskTrack.Sectors < imageInfo.SectorsPerTrack)
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if(teleDiskTrack.Cylinder + 1 == totalCylinders)
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{
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hasLeadOutOnHead0 |= teleDiskTrack.Head == 0;
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hasLeadOutOnHead1 |= teleDiskTrack.Head == 1;
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if(imageInfo.Cylinders == totalCylinders) imageInfo.Cylinders--;
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}
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else
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imageInfo.SectorsPerTrack = teleDiskTrack.Sectors;
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for(byte processedSectors = 0; processedSectors < teleDiskTrack.Sectors; processedSectors++)
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{
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TeleDiskSectorHeader teleDiskSector = new TeleDiskSectorHeader();
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TeleDiskDataHeader teleDiskData = new TeleDiskDataHeader();
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byte[] dataSizeBytes = new byte[2];
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teleDiskSector.Cylinder = (byte)stream.ReadByte();
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teleDiskSector.Head = (byte)stream.ReadByte();
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teleDiskSector.SectorNumber = (byte)stream.ReadByte();
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teleDiskSector.SectorSize = (byte)stream.ReadByte();
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teleDiskSector.Flags = (byte)stream.ReadByte();
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teleDiskSector.Crc = (byte)stream.ReadByte();
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if((teleDiskSector.Flags & FLAGS_SECTOR_DATALESS) == FLAGS_SECTOR_DATALESS ||
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(teleDiskSector.Flags & FLAGS_SECTOR_SKIPPED) == FLAGS_SECTOR_SKIPPED) continue;
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stream.Read(dataSizeBytes, 0, 2);
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teleDiskData.DataSize = BitConverter.ToUInt16(dataSizeBytes, 0);
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teleDiskData.DataSize--; // Sydex decided to including dataEncoding byte as part of it
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teleDiskData.DataEncoding = (byte)stream.ReadByte();
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byte[] data = new byte[teleDiskData.DataSize];
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stream.Read(data, 0, teleDiskData.DataSize);
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}
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}
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sectorsData = new byte[totalCylinders][][][];
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// Total sectors per track
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uint[][] spts = new uint[totalCylinders][];
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DicConsole.DebugWriteLine("TeleDisk plugin",
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"Found {0} cylinders and {1} heads with a maximum sector number of {2}",
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totalCylinders, totalHeads, maxSector);
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// Create heads
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for(int i = 0; i < totalCylinders; i++)
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{
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sectorsData[i] = new byte[totalHeads][][];
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spts[i] = new uint[totalHeads];
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for(int j = 0; j < totalHeads; j++) sectorsData[i][j] = new byte[maxSector + 1][];
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}
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// Decode the image
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stream.Seek(currentPos, SeekOrigin.Begin);
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while(true)
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{
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TeleDiskTrackHeader teleDiskTrack = new TeleDiskTrackHeader();
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byte[] tdTrackForCrc = new byte[3];
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teleDiskTrack.Sectors = (byte)stream.ReadByte();
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teleDiskTrack.Cylinder = (byte)stream.ReadByte();
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teleDiskTrack.Head = (byte)stream.ReadByte();
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teleDiskTrack.Crc = (byte)stream.ReadByte();
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tdTrackForCrc[0] = teleDiskTrack.Sectors;
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tdTrackForCrc[1] = teleDiskTrack.Cylinder;
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tdTrackForCrc[2] = teleDiskTrack.Head;
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byte tdTrackCalculatedCrc = (byte)(TeleDiskCrc(0, tdTrackForCrc) & 0xFF);
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DicConsole.DebugWriteLine("TeleDisk plugin", "Track follows");
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tTrack cylinder: {0}\t", teleDiskTrack.Cylinder);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tTrack head: {0}\t", teleDiskTrack.Head);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tSectors in track: {0}\t", teleDiskTrack.Sectors);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tTrack header CRC: 0x{0:X2} (calculated 0x{1:X2})\t",
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teleDiskTrack.Crc, tdTrackCalculatedCrc);
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aDiskCrcHasFailed |= tdTrackCalculatedCrc != teleDiskTrack.Crc;
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if(teleDiskTrack.Sectors == 0xFF) // End of disk image
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{
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DicConsole.DebugWriteLine("TeleDisk plugin", "End of disk image arrived");
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DicConsole.DebugWriteLine("TeleDisk plugin", "Total of {0} data sectors, for {1} bytes",
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totalSectors, totalDiskSize);
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break;
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}
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for(byte processedSectors = 0; processedSectors < teleDiskTrack.Sectors; processedSectors++)
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{
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TeleDiskSectorHeader teleDiskSector = new TeleDiskSectorHeader();
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TeleDiskDataHeader teleDiskData = new TeleDiskDataHeader();
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byte[] dataSizeBytes = new byte[2];
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byte[] decodedData;
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teleDiskSector.Cylinder = (byte)stream.ReadByte();
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teleDiskSector.Head = (byte)stream.ReadByte();
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teleDiskSector.SectorNumber = (byte)stream.ReadByte();
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teleDiskSector.SectorSize = (byte)stream.ReadByte();
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teleDiskSector.Flags = (byte)stream.ReadByte();
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teleDiskSector.Crc = (byte)stream.ReadByte();
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DicConsole.DebugWriteLine("TeleDisk plugin", "\tSector follows");
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DicConsole.DebugWriteLine("TeleDisk plugin", "\t\tAddressMark cylinder: {0}",
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teleDiskSector.Cylinder);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\t\tAddressMark head: {0}", teleDiskSector.Head);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\t\tAddressMark sector number: {0}",
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teleDiskSector.SectorNumber);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\t\tSector size: {0}",
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teleDiskSector.SectorSize);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\t\tSector flags: 0x{0:X2}", teleDiskSector.Flags);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\t\tSector CRC (plus headers): 0x{0:X2}",
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teleDiskSector.Crc);
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uint lba = (uint)(teleDiskSector.Cylinder * header.Sides * imageInfo.SectorsPerTrack +
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teleDiskSector.Head * imageInfo.SectorsPerTrack +
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(teleDiskSector.SectorNumber - 1));
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if((teleDiskSector.Flags & FLAGS_SECTOR_DATALESS) != FLAGS_SECTOR_DATALESS &&
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(teleDiskSector.Flags & FLAGS_SECTOR_SKIPPED) != FLAGS_SECTOR_SKIPPED)
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{
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stream.Read(dataSizeBytes, 0, 2);
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teleDiskData.DataSize = BitConverter.ToUInt16(dataSizeBytes, 0);
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teleDiskData.DataSize--; // Sydex decided to including dataEncoding byte as part of it
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imageInfo.ImageSize += teleDiskData.DataSize;
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teleDiskData.DataEncoding = (byte)stream.ReadByte();
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byte[] data = new byte[teleDiskData.DataSize];
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stream.Read(data, 0, teleDiskData.DataSize);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\t\tData size (in-image): {0}",
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teleDiskData.DataSize);
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DicConsole.DebugWriteLine("TeleDisk plugin", "\t\tData encoding: 0x{0:X2}",
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teleDiskData.DataEncoding);
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decodedData = DecodeTeleDiskData(teleDiskSector.SectorSize, teleDiskData.DataEncoding, data);
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byte tdSectorCalculatedCrc = (byte)(TeleDiskCrc(0, decodedData) & 0xFF);
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if(tdSectorCalculatedCrc != teleDiskSector.Crc)
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{
|
|
DicConsole.DebugWriteLine("TeleDisk plugin",
|
|
"Sector {0}:{3}:{4} calculated CRC 0x{1:X2} differs from stored CRC 0x{2:X2}",
|
|
teleDiskTrack.Cylinder, tdSectorCalculatedCrc, teleDiskSector.Crc,
|
|
teleDiskTrack.Cylinder, teleDiskSector.SectorNumber);
|
|
if((teleDiskSector.Flags & FLAGS_SECTOR_NO_ID) != FLAGS_SECTOR_NO_ID)
|
|
sectorsWhereCrcHasFailed.Add(lba);
|
|
}
|
|
}
|
|
else decodedData = new byte[128 << teleDiskSector.SectorSize];
|
|
|
|
DicConsole.DebugWriteLine("TeleDisk plugin", "\t\tLBA: {0}", lba);
|
|
|
|
if((teleDiskSector.Flags & FLAGS_SECTOR_NO_ID) == FLAGS_SECTOR_NO_ID) continue;
|
|
|
|
if(sectorsData[teleDiskTrack.Cylinder][teleDiskTrack.Head][teleDiskSector.SectorNumber] != null)
|
|
DicConsole.DebugWriteLine("TeleDisk plugin",
|
|
(teleDiskSector.Flags & FLAGS_SECTOR_DUPLICATE) ==
|
|
FLAGS_SECTOR_DUPLICATE
|
|
? "\t\tSector {0} on cylinder {1} head {2} is duplicate, and marked so"
|
|
: "\t\tSector {0} on cylinder {1} head {2} is duplicate, but is not marked so",
|
|
teleDiskSector.SectorNumber, teleDiskSector.Cylinder,
|
|
teleDiskSector.Head);
|
|
else
|
|
{
|
|
sectorsData[teleDiskTrack.Cylinder][teleDiskTrack.Head][teleDiskSector.SectorNumber] =
|
|
decodedData;
|
|
totalDiskSize += (uint)decodedData.Length;
|
|
}
|
|
}
|
|
}
|
|
|
|
MemoryStream leadOutMs = new MemoryStream();
|
|
if(hasLeadOutOnHead0)
|
|
for(int i = 0; i < sectorsData[totalCylinders - 1][0].Length; i++)
|
|
if(sectorsData[totalCylinders - 1][0][i] != null)
|
|
leadOutMs.Write(sectorsData[totalCylinders - 1][0][i], 0,
|
|
sectorsData[totalCylinders - 1][0][i].Length);
|
|
if(hasLeadOutOnHead1)
|
|
for(int i = 0; i < sectorsData[totalCylinders - 1][1].Length; i++)
|
|
if(sectorsData[totalCylinders - 1][1][i] != null)
|
|
leadOutMs.Write(sectorsData[totalCylinders - 1][1][i], 0,
|
|
sectorsData[totalCylinders - 1][1][i].Length);
|
|
|
|
if(leadOutMs.Length != 0)
|
|
{
|
|
leadOut = leadOutMs.ToArray();
|
|
imageInfo.ReadableMediaTags.Add(MediaTagType.Floppy_LeadOut);
|
|
}
|
|
|
|
imageInfo.Sectors = imageInfo.Cylinders * imageInfo.Heads * imageInfo.SectorsPerTrack;
|
|
imageInfo.MediaType = DecodeTeleDiskDiskType();
|
|
|
|
imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
|
|
|
|
DicConsole.VerboseWriteLine("TeleDisk image contains a disk of type {0}", imageInfo.MediaType);
|
|
if(!string.IsNullOrEmpty(imageInfo.Comments))
|
|
DicConsole.VerboseWriteLine("TeleDisk comments: {0}", imageInfo.Comments);
|
|
|
|
inStream.Dispose();
|
|
stream.Dispose();
|
|
|
|
return true;
|
|
}
|
|
|
|
public byte[] ReadSector(ulong sectorAddress)
|
|
{
|
|
(ushort cylinder, byte head, byte sector) = LbaToChs(sectorAddress);
|
|
|
|
if(cylinder >= sectorsData.Length)
|
|
throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
|
|
|
|
if(head >= sectorsData[cylinder].Length)
|
|
throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
|
|
|
|
if(sector > sectorsData[cylinder][head].Length)
|
|
throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
|
|
|
|
return sectorsData[cylinder][head][sector];
|
|
}
|
|
|
|
public byte[] ReadSectors(ulong sectorAddress, uint length)
|
|
{
|
|
if(sectorAddress > imageInfo.Sectors - 1)
|
|
throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
|
|
|
|
if(sectorAddress + length > imageInfo.Sectors)
|
|
throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");
|
|
|
|
MemoryStream buffer = new MemoryStream();
|
|
for(uint i = 0; i < length; i++)
|
|
{
|
|
byte[] sector = ReadSector(sectorAddress + i) ?? new byte[imageInfo.SectorSize];
|
|
buffer.Write(sector, 0, sector.Length);
|
|
}
|
|
|
|
return buffer.ToArray();
|
|
}
|
|
|
|
public byte[] ReadSectorLong(ulong sectorAddress)
|
|
{
|
|
return ReadSectors(sectorAddress, 1);
|
|
}
|
|
|
|
public byte[] ReadSectorsLong(ulong sectorAddress, uint length)
|
|
{
|
|
return ReadSectors(sectorAddress, length);
|
|
}
|
|
|
|
public bool? VerifySector(ulong sectorAddress)
|
|
{
|
|
return !sectorsWhereCrcHasFailed.Contains(sectorAddress);
|
|
}
|
|
|
|
public bool? VerifySector(ulong sectorAddress, uint track)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
public bool? VerifySectors(ulong sectorAddress, uint length, out List<ulong> failingLbas,
|
|
out List<ulong> unknownLbas)
|
|
{
|
|
failingLbas = new List<ulong>();
|
|
unknownLbas = new List<ulong>();
|
|
|
|
for(ulong i = sectorAddress; i < sectorAddress + length; i++)
|
|
if(sectorsWhereCrcHasFailed.Contains(sectorAddress))
|
|
failingLbas.Add(sectorAddress);
|
|
|
|
return failingLbas.Count <= 0;
|
|
}
|
|
|
|
public bool? VerifySectors(ulong sectorAddress, uint length, uint track, out List<ulong> failingLbas,
|
|
out List<ulong> unknownLbas)
|
|
{
|
|
failingLbas = new List<ulong>();
|
|
unknownLbas = new List<ulong>();
|
|
|
|
for(ulong i = sectorAddress; i < sectorAddress + length; i++) unknownLbas.Add(i);
|
|
|
|
return null;
|
|
}
|
|
|
|
public bool? VerifyMediaImage()
|
|
{
|
|
return aDiskCrcHasFailed;
|
|
}
|
|
|
|
public byte[] ReadDiskTag(MediaTagType tag)
|
|
{
|
|
if(tag != MediaTagType.Floppy_LeadOut)
|
|
throw new FeatureUnsupportedImageException("Feature not supported by image format");
|
|
|
|
if(leadOut != null) return leadOut;
|
|
|
|
throw new FeatureNotPresentImageException("Lead-out not present in disk image");
|
|
}
|
|
}
|
|
} |