aaru-dps/Aaru
1
0
Fork 0
mirror of https://github.com/aaru-dps/Aaru.git synced 2025-12-16 19:24:25 +00:00
Code Issues Packages Projects Releases Wiki Activity
Files
4e6e8f340aed1deec8ecc1a2d40a7e886cfe955b
Aaru/DiscImageChef.DiscImages/DiskCopy42.cs

946 lines
39 KiB
C#
Raw Blame History

// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename : DiskCopy42.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
// Manages Apple DiskCopy 4.2 disc images, including unofficial modifications.
//
// --[ License ] --------------------------------------------------------------
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2018 Natalia Portillo
// ****************************************************************************/
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
using Claunia.RsrcFork;
using DiscImageChef.CommonTypes;
using DiscImageChef.Console;
using DiscImageChef.Filters;
using Version = Resources.Version;
namespace DiscImageChef.DiscImages
{
// Checked using several images and strings inside Apple's DiskImages.framework
public class DiskCopy42 : ImagePlugin
{
#region Internal Structures
// DiskCopy 4.2 header, big-endian, data-fork, start of file, 84 bytes
struct Dc42Header
{
/// <summary>0x00, 64 bytes, pascal string, disk name or "-not a Macintosh disk-", filled with garbage</summary>
public string DiskName;
/// <summary>0x40, size of data in bytes (usually sectors*512)</summary>
public uint DataSize;
/// <summary>0x44, size of tags in bytes (usually sectors*12)</summary>
public uint TagSize;
/// <summary>0x48, checksum of data bytes</summary>
public uint DataChecksum;
/// <summary>0x4C, checksum of tag bytes</summary>
public uint TagChecksum;
/// <summary>0x50, format of disk, see constants</summary>
public byte Format;
/// <summary>0x51, format of sectors, see constants</summary>
public byte FmtByte;
/// <summary>0x52, is disk image valid? always 0x01</summary>
public byte Valid;
/// <summary>0x53, reserved, always 0x00</summary>
public byte Reserved;
}
#endregion
#region Internal Constants
// format byte
/// <summary>3.5", single side, double density, GCR</summary>
const byte kSonyFormat400K = 0x00;
/// <summary>3.5", double side, double density, GCR</summary>
const byte kSonyFormat800K = 0x01;
/// <summary>3.5", double side, double density, MFM</summary>
const byte kSonyFormat720K = 0x02;
/// <summary>3.5", double side, high density, MFM</summary>
const byte kSonyFormat1440K = 0x03;
/// <summary>3.5", double side, high density, MFM, 21 sectors/track (aka, Microsoft DMF)</summary>
// Unchecked value</summary>
const byte kSonyFormat1680K = 0x04;
/// <summary>Defined by Sigma Seven's BLU</summary>
const byte kSigmaFormatTwiggy = 0x54;
/// <summary>Defined by LisaEm</summary>
const byte kNotStandardFormat = 0x5D;
// There should be a value for Apple HD20 hard disks, unknown...
// fmyByte byte
// Based on GCR nibble
// Always 0x02 for MFM disks
// Unknown for Apple HD20
/// <summary>Defined by Sigma Seven's BLU</summary>
const byte kSigmaFmtByteTwiggy = 0x01;
/// <summary>3.5" single side double density GCR and MFM all use same code</summary>
const byte kSonyFmtByte400K = 0x02;
const byte kSonyFmtByte720K = kSonyFmtByte400K;
const byte kSonyFmtByte1440K = kSonyFmtByte400K;
const byte kSonyFmtByte1680K = kSonyFmtByte400K;
/// <summary>3.5" double side double density GCR, 512 bytes/sector, interleave 2:1</summary>
const byte kSonyFmtByte800K = 0x22;
/// <summary>3.5" double side double density GCR, 512 bytes/sector, interleave 2:1, incorrect value (but appears on official documentation)</summary>
const byte kSonyFmtByte800KIncorrect = 0x12;
/// <summary>3.5" double side double density GCR, ProDOS format, interleave 4:1</summary>
const byte kSonyFmtByteProDos = 0x24;
/// <summary>Unformatted sectors</summary>
const byte kInvalidFmtByte = 0x96;
/// <summary>Defined by LisaEm</summary>
const byte kFmtNotStandard = 0x93;
/// <summary>Used incorrectly by Mac OS X with certaing disk images</summary>
const byte kMacOSXFmtByte = 0x00;
#endregion
#region Internal variables
/// <summary>Start of data sectors in disk image, should be 0x58</summary>
uint dataOffset;
/// <summary>Start of tags in disk image, after data sectors</summary>
uint tagOffset;
/// <summary>Bytes per tag, should be 12</summary>
uint bptag;
/// <summary>Header of opened image</summary>
Dc42Header header;
/// <summary>Disk image file</summary>
Filter dc42ImageFilter;
byte[] twiggyCache;
byte[] twiggyCacheTags;
bool twiggy;
#endregion
public DiskCopy42()
{
Name = "Apple DiskCopy 4.2";
PluginUuid = new Guid("0240B7B1-E959-4CDC-B0BD-386D6E467B88");
ImageInfo = new ImageInfo();
ImageInfo.ReadableSectorTags = new List<SectorTagType>();
ImageInfo.ReadableMediaTags = new List<MediaTagType>();
ImageInfo.ImageHasPartitions = false;
ImageInfo.ImageHasSessions = false;
ImageInfo.ImageVersion = "4.2";
ImageInfo.ImageApplication = "Apple DiskCopy";
ImageInfo.ImageApplicationVersion = "4.2";
ImageInfo.ImageCreator = null;
ImageInfo.ImageComments = null;
ImageInfo.MediaManufacturer = null;
ImageInfo.MediaModel = null;
ImageInfo.MediaSerialNumber = null;
ImageInfo.MediaBarcode = null;
ImageInfo.MediaPartNumber = null;
ImageInfo.MediaSequence = 0;
ImageInfo.LastMediaSequence = 0;
ImageInfo.DriveManufacturer = null;
ImageInfo.DriveModel = null;
ImageInfo.DriveSerialNumber = null;
ImageInfo.DriveFirmwareRevision = null;
}
public override bool IdentifyImage(Filter imageFilter)
{
Stream stream = imageFilter.GetDataForkStream();
stream.Seek(0, SeekOrigin.Begin);
byte[] buffer = new byte[0x58];
byte[] pString = new byte[64];
stream.Read(buffer, 0, 0x58);
// Incorrect pascal string length, not DC42
if(buffer[0] > 63) return false;
Dc42Header tmpHeader = new Dc42Header();
Array.Copy(buffer, 0, pString, 0, 64);
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
tmpHeader.DiskName = StringHandlers.PascalToString(pString, Encoding.GetEncoding("macintosh"));
tmpHeader.DataSize = BigEndianBitConverter.ToUInt32(buffer, 0x40);
tmpHeader.TagSize = BigEndianBitConverter.ToUInt32(buffer, 0x44);
tmpHeader.DataChecksum = BigEndianBitConverter.ToUInt32(buffer, 0x48);
tmpHeader.TagChecksum = BigEndianBitConverter.ToUInt32(buffer, 0x4C);
tmpHeader.Format = buffer[0x50];
tmpHeader.FmtByte = buffer[0x51];
tmpHeader.Valid = buffer[0x52];
tmpHeader.Reserved = buffer[0x53];
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.diskName = \"{0}\"", tmpHeader.DiskName);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.dataSize = {0} bytes", tmpHeader.DataSize);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.tagSize = {0} bytes", tmpHeader.TagSize);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.dataChecksum = 0x{0:X8}", tmpHeader.DataChecksum);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.tagChecksum = 0x{0:X8}", tmpHeader.TagChecksum);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.format = 0x{0:X2}", tmpHeader.Format);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.fmtByte = 0x{0:X2}", tmpHeader.FmtByte);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.valid = {0}", tmpHeader.Valid);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.reserved = {0}", tmpHeader.Reserved);
if(tmpHeader.Valid != 1 || tmpHeader.Reserved != 0) return false;
// Some versions seem to incorrectly create little endian fields
if(tmpHeader.DataSize + tmpHeader.TagSize + 0x54 != imageFilter.GetDataForkLength() &&
tmpHeader.Format != kSigmaFormatTwiggy)
{
tmpHeader.DataSize = BitConverter.ToUInt32(buffer, 0x40);
tmpHeader.TagSize = BitConverter.ToUInt32(buffer, 0x44);
tmpHeader.DataChecksum = BitConverter.ToUInt32(buffer, 0x48);
tmpHeader.TagChecksum = BitConverter.ToUInt32(buffer, 0x4C);
if(tmpHeader.DataSize + tmpHeader.TagSize + 0x54 != imageFilter.GetDataForkLength() &&
tmpHeader.Format != kSigmaFormatTwiggy) return false;
}
if(tmpHeader.Format != kSonyFormat400K && tmpHeader.Format != kSonyFormat800K &&
tmpHeader.Format != kSonyFormat720K && tmpHeader.Format != kSonyFormat1440K &&
tmpHeader.Format != kSonyFormat1680K && tmpHeader.Format != kSigmaFormatTwiggy &&
tmpHeader.Format != kNotStandardFormat)
{
DicConsole.DebugWriteLine("DC42 plugin", "Unknown tmp_header.format = 0x{0:X2} value",
tmpHeader.Format);
return false;
}
if(tmpHeader.FmtByte != kSonyFmtByte400K && tmpHeader.FmtByte != kSonyFmtByte800K &&
tmpHeader.FmtByte != kSonyFmtByte800KIncorrect && tmpHeader.FmtByte != kSonyFmtByteProDos &&
tmpHeader.FmtByte != kInvalidFmtByte && tmpHeader.FmtByte != kSigmaFmtByteTwiggy &&
tmpHeader.FmtByte != kFmtNotStandard && tmpHeader.FmtByte != kMacOSXFmtByte)
{
DicConsole.DebugWriteLine("DC42 plugin", "Unknown tmp_header.fmtByte = 0x{0:X2} value",
tmpHeader.FmtByte);
return false;
}
if(tmpHeader.FmtByte != kInvalidFmtByte) return true;
DicConsole.DebugWriteLine("DC42 plugin", "Image says it's unformatted");
return false;
}
public override bool OpenImage(Filter imageFilter)
{
Stream stream = imageFilter.GetDataForkStream();
stream.Seek(0, SeekOrigin.Begin);
byte[] buffer = new byte[0x58];
byte[] pString = new byte[64];
stream.Read(buffer, 0, 0x58);
// Incorrect pascal string length, not DC42
if(buffer[0] > 63) return false;
header = new Dc42Header();
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
Array.Copy(buffer, 0, pString, 0, 64);
header.DiskName = StringHandlers.PascalToString(pString, Encoding.GetEncoding("macintosh"));
header.DataSize = BigEndianBitConverter.ToUInt32(buffer, 0x40);
header.TagSize = BigEndianBitConverter.ToUInt32(buffer, 0x44);
header.DataChecksum = BigEndianBitConverter.ToUInt32(buffer, 0x48);
header.TagChecksum = BigEndianBitConverter.ToUInt32(buffer, 0x4C);
header.Format = buffer[0x50];
header.FmtByte = buffer[0x51];
header.Valid = buffer[0x52];
header.Reserved = buffer[0x53];
DicConsole.DebugWriteLine("DC42 plugin", "header.diskName = \"{0}\"", header.DiskName);
DicConsole.DebugWriteLine("DC42 plugin", "header.dataSize = {0} bytes", header.DataSize);
DicConsole.DebugWriteLine("DC42 plugin", "header.tagSize = {0} bytes", header.TagSize);
DicConsole.DebugWriteLine("DC42 plugin", "header.dataChecksum = 0x{0:X8}", header.DataChecksum);
DicConsole.DebugWriteLine("DC42 plugin", "header.tagChecksum = 0x{0:X8}", header.TagChecksum);
DicConsole.DebugWriteLine("DC42 plugin", "header.format = 0x{0:X2}", header.Format);
DicConsole.DebugWriteLine("DC42 plugin", "header.fmtByte = 0x{0:X2}", header.FmtByte);
DicConsole.DebugWriteLine("DC42 plugin", "header.valid = {0}", header.Valid);
DicConsole.DebugWriteLine("DC42 plugin", "header.reserved = {0}", header.Reserved);
if(header.Valid != 1 || header.Reserved != 0) return false;
// Some versions seem to incorrectly create little endian fields
if(header.DataSize + header.TagSize + 0x54 != imageFilter.GetDataForkLength() &&
header.Format != kSigmaFormatTwiggy)
{
header.DataSize = BitConverter.ToUInt32(buffer, 0x40);
header.TagSize = BitConverter.ToUInt32(buffer, 0x44);
header.DataChecksum = BitConverter.ToUInt32(buffer, 0x48);
header.TagChecksum = BitConverter.ToUInt32(buffer, 0x4C);
if(header.DataSize + header.TagSize + 0x54 != imageFilter.GetDataForkLength() &&
header.Format != kSigmaFormatTwiggy) return false;
}
if(header.Format != kSonyFormat400K && header.Format != kSonyFormat800K &&
header.Format != kSonyFormat720K && header.Format != kSonyFormat1440K &&
header.Format != kSonyFormat1680K && header.Format != kSigmaFormatTwiggy &&
header.Format != kNotStandardFormat)
{
DicConsole.DebugWriteLine("DC42 plugin", "Unknown header.format = 0x{0:X2} value", header.Format);
return false;
}
if(header.FmtByte != kSonyFmtByte400K && header.FmtByte != kSonyFmtByte800K &&
header.FmtByte != kSonyFmtByte800KIncorrect && header.FmtByte != kSonyFmtByteProDos &&
header.FmtByte != kInvalidFmtByte && header.FmtByte != kSigmaFmtByteTwiggy &&
header.FmtByte != kFmtNotStandard && header.FmtByte != kMacOSXFmtByte)
{
DicConsole.DebugWriteLine("DC42 plugin", "Unknown tmp_header.fmtByte = 0x{0:X2} value", header.FmtByte);
return false;
}
if(header.FmtByte == kInvalidFmtByte)
{
DicConsole.DebugWriteLine("DC42 plugin", "Image says it's unformatted");
return false;
}
dataOffset = 0x54;
tagOffset = header.TagSize != 0 ? 0x54 + header.DataSize : 0;
ImageInfo.SectorSize = 512;
bptag = (uint)(header.TagSize != 0 ? 12 : 0);
dc42ImageFilter = imageFilter;
ImageInfo.Sectors = header.DataSize / 512;
if(header.TagSize != 0)
{
bptag = (uint)(header.TagSize / ImageInfo.Sectors);
DicConsole.DebugWriteLine("DC42 plugin", "bptag = {0} bytes", bptag);
if(bptag != 12 && bptag != 20 && bptag != 24)
{
DicConsole.DebugWriteLine("DC42 plugin", "Unknown tag size");
return false;
}
ImageInfo.ReadableSectorTags.Add(SectorTagType.AppleSectorTag);
}
ImageInfo.ImageSize = ImageInfo.Sectors * ImageInfo.SectorSize + ImageInfo.Sectors * bptag;
ImageInfo.ImageCreationTime = imageFilter.GetCreationTime();
ImageInfo.ImageLastModificationTime = imageFilter.GetLastWriteTime();
ImageInfo.ImageName = header.DiskName;
switch(header.Format)
{
case kSonyFormat400K:
if(ImageInfo.Sectors == 1600) ImageInfo.MediaType = MediaType.AppleSonyDS;
else ImageInfo.MediaType = MediaType.AppleSonySS;
break;
case kSonyFormat800K:
ImageInfo.MediaType = MediaType.AppleSonyDS;
break;
case kSonyFormat720K:
ImageInfo.MediaType = MediaType.DOS_35_DS_DD_9;
break;
case kSonyFormat1440K:
ImageInfo.MediaType = MediaType.DOS_35_HD;
break;
case kSonyFormat1680K:
ImageInfo.MediaType = MediaType.DMF;
break;
case kSigmaFormatTwiggy:
ImageInfo.MediaType = MediaType.AppleFileWare;
break;
case kNotStandardFormat:
switch(ImageInfo.Sectors)
{
case 9728:
ImageInfo.MediaType = MediaType.AppleProfile;
break;
case 19456:
ImageInfo.MediaType = MediaType.AppleProfile;
break;
case 38912:
ImageInfo.MediaType = MediaType.AppleWidget;
break;
case 39040:
ImageInfo.MediaType = MediaType.AppleHD20;
break;
default:
ImageInfo.MediaType = MediaType.Unknown;
break;
}
break;
default:
ImageInfo.MediaType = MediaType.Unknown;
break;
}
if(ImageInfo.MediaType == MediaType.AppleFileWare)
{
byte[] data = new byte[header.DataSize];
byte[] tags = new byte[header.TagSize];
twiggyCache = new byte[header.DataSize];
twiggyCacheTags = new byte[header.TagSize];
twiggy = true;
Stream datastream = imageFilter.GetDataForkStream();
datastream.Seek(dataOffset, SeekOrigin.Begin);
datastream.Read(data, 0, (int)header.DataSize);
Stream tagstream = imageFilter.GetDataForkStream();
tagstream.Seek(tagOffset, SeekOrigin.Begin);
tagstream.Read(tags, 0, (int)header.TagSize);
ushort mfsMagic = BigEndianBitConverter.ToUInt16(data, data.Length / 2 + 0x400);
ushort mfsAllBlocks = BigEndianBitConverter.ToUInt16(data, data.Length / 2 + 0x412);
// Detect a Macintosh Twiggy
if(mfsMagic == 0xD2D7 && mfsAllBlocks == 422)
{
DicConsole.DebugWriteLine("DC42 plugin", "Macintosh Twiggy detected, reversing disk sides");
Array.Copy(data, header.DataSize / 2, twiggyCache, 0, header.DataSize / 2);
Array.Copy(tags, header.TagSize / 2, twiggyCacheTags, 0, header.TagSize / 2);
Array.Copy(data, 0, twiggyCache, header.DataSize / 2, header.DataSize / 2);
Array.Copy(tags, 0, twiggyCacheTags, header.TagSize / 2, header.TagSize / 2);
}
else
{
DicConsole.DebugWriteLine("DC42 plugin", "Lisa Twiggy detected, reversing second half of disk");
Array.Copy(data, 0, twiggyCache, 0, header.DataSize / 2);
Array.Copy(tags, 0, twiggyCacheTags, 0, header.TagSize / 2);
int copiedSectors = 0;
int sectorsToCopy = 0;
for(int i = 0; i < 46; i++)
{
if(i >= 0 && i <= 3) sectorsToCopy = 22;
if(i >= 4 && i <= 10) sectorsToCopy = 21;
if(i >= 11 && i <= 16) sectorsToCopy = 20;
if(i >= 17 && i <= 22) sectorsToCopy = 19;
if(i >= 23 && i <= 28) sectorsToCopy = 18;
if(i >= 29 && i <= 34) sectorsToCopy = 17;
if(i >= 35 && i <= 41) sectorsToCopy = 16;
if(i >= 42 && i <= 45) sectorsToCopy = 15;
Array.Copy(data, header.DataSize / 2 + copiedSectors * 512, twiggyCache,
twiggyCache.Length - copiedSectors * 512 - sectorsToCopy * 512, sectorsToCopy * 512);
Array.Copy(tags, header.TagSize / 2 + copiedSectors * bptag, twiggyCacheTags,
twiggyCacheTags.Length - copiedSectors * bptag - sectorsToCopy * bptag,
sectorsToCopy * bptag);
copiedSectors += sectorsToCopy;
}
}
}
try
{
if(imageFilter.HasResourceFork())
{
ResourceFork rsrcFork = new ResourceFork(imageFilter.GetResourceForkStream());
if(rsrcFork.ContainsKey(0x76657273))
{
Resource versRsrc = rsrcFork.GetResource(0x76657273);
if(versRsrc != null)
{
byte[] vers = versRsrc.GetResource(versRsrc.GetIds()[0]);
if(vers != null)
{
Version version = new Version(vers);
string major;
string minor;
string release = null;
string dev = null;
string pre = null;
major = $"{version.MajorVersion}";
minor = $".{version.MinorVersion / 10}";
if(version.MinorVersion % 10 > 0)
release = $".{version.MinorVersion % 10}";
switch(version.DevStage)
{
case Version.DevelopmentStage.Alpha:
dev = "a";
break;
case Version.DevelopmentStage.Beta:
dev = "b";
break;
case Version.DevelopmentStage.PreAlpha:
dev = "d";
break;
}
if(dev == null && version.PreReleaseVersion > 0) dev = "f";
if(dev != null) pre = $"{version.PreReleaseVersion}";
ImageInfo.ImageApplicationVersion = $"{major}{minor}{release}{dev}{pre}";
ImageInfo.ImageApplication = version.VersionString;
ImageInfo.ImageComments = version.VersionMessage;
}
}
}
if(rsrcFork.ContainsKey(0x64437079))
{
Resource dCpyRsrc = rsrcFork.GetResource(0x64437079);
if(dCpyRsrc != null)
{
string dCpy = StringHandlers.PascalToString(dCpyRsrc.GetResource(dCpyRsrc.GetIds()[0]),
Encoding.GetEncoding("macintosh"));
string dCpyRegEx =
"(?<application>\\S+)\\s(?<version>\\S+)\\rData checksum=\\$(?<checksum>\\S+)$";
Regex dCpyEx = new Regex(dCpyRegEx);
Match dCpyMatch = dCpyEx.Match(dCpy);
if(dCpyMatch.Success)
{
ImageInfo.ImageApplication = dCpyMatch.Groups["application"].Value;
ImageInfo.ImageApplicationVersion = dCpyMatch.Groups["version"].Value;
// Until MacRoman is implemented
if(ImageInfo.ImageApplication == "ShrinkWrap?")
ImageInfo.ImageApplication = "ShrinkWrap™";
}
}
}
}
}
catch(InvalidCastException) { }
DicConsole.DebugWriteLine("DC42 plugin", "Image application = {0} version {1}", ImageInfo.ImageApplication,
ImageInfo.ImageApplicationVersion);
ImageInfo.XmlMediaType = XmlMediaType.BlockMedia;
DicConsole.VerboseWriteLine("DiskCopy 4.2 image contains a disk of type {0}", ImageInfo.MediaType);
switch(ImageInfo.MediaType)
{
case MediaType.AppleSonySS:
ImageInfo.Cylinders = 80;
ImageInfo.Heads = 1;
ImageInfo.SectorsPerTrack = 10;
break;
case MediaType.AppleSonyDS:
ImageInfo.Cylinders = 80;
ImageInfo.Heads = 2;
ImageInfo.SectorsPerTrack = 10;
break;
case MediaType.DOS_35_DS_DD_9:
ImageInfo.Cylinders = 80;
ImageInfo.Heads = 2;
ImageInfo.SectorsPerTrack = 9;
break;
case MediaType.DOS_35_HD:
ImageInfo.Cylinders = 80;
ImageInfo.Heads = 2;
ImageInfo.SectorsPerTrack = 18;
break;
case MediaType.DMF:
ImageInfo.Cylinders = 80;
ImageInfo.Heads = 2;
ImageInfo.SectorsPerTrack = 21;
break;
case MediaType.AppleProfile:
switch(ImageInfo.Sectors)
{
case 9728:
ImageInfo.Cylinders = 152;
break;
case 19456:
ImageInfo.Cylinders = 304;
break;
}
ImageInfo.Heads = 4;
ImageInfo.SectorsPerTrack = 16;
break;
case MediaType.AppleWidget:
ImageInfo.Cylinders = 608;
ImageInfo.Heads = 2;
ImageInfo.SectorsPerTrack = 16;
break;
case MediaType.AppleHD20:
ImageInfo.Cylinders = 610;
ImageInfo.Heads = 2;
ImageInfo.SectorsPerTrack = 16;
break;
default:
ImageInfo.Cylinders = (uint)(ImageInfo.Sectors / 16 / 63);
ImageInfo.Heads = 16;
ImageInfo.SectorsPerTrack = 63;
break;
}
return true;
}
public override bool? VerifySector(ulong sectorAddress)
{
return null;
}
public override bool? VerifySector(ulong sectorAddress, uint track)
{
return null;
}
public override 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++) unknownLbas.Add(i);
return null;
}
public override 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 override bool? VerifyMediaImage()
{
byte[] data = new byte[header.DataSize];
byte[] tags = new byte[header.TagSize];
uint dataChk;
uint tagsChk = 0;
DicConsole.DebugWriteLine("DC42 plugin", "Reading data");
Stream datastream = dc42ImageFilter.GetDataForkStream();
datastream.Seek(dataOffset, SeekOrigin.Begin);
datastream.Read(data, 0, (int)header.DataSize);
DicConsole.DebugWriteLine("DC42 plugin", "Calculating data checksum");
dataChk = DC42CheckSum(data);
DicConsole.DebugWriteLine("DC42 plugin", "Calculated data checksum = 0x{0:X8}", dataChk);
DicConsole.DebugWriteLine("DC42 plugin", "Stored data checksum = 0x{0:X8}", header.DataChecksum);
if(header.TagSize <= 0) return dataChk == header.DataChecksum && tagsChk == header.TagChecksum;
DicConsole.DebugWriteLine("DC42 plugin", "Reading tags");
Stream tagstream = dc42ImageFilter.GetDataForkStream();
tagstream.Seek(tagOffset, SeekOrigin.Begin);
tagstream.Read(tags, 0, (int)header.TagSize);
DicConsole.DebugWriteLine("DC42 plugin", "Calculating tag checksum");
tagsChk = DC42CheckSum(tags);
DicConsole.DebugWriteLine("DC42 plugin", "Calculated tag checksum = 0x{0:X8}", tagsChk);
DicConsole.DebugWriteLine("DC42 plugin", "Stored tag checksum = 0x{0:X8}", header.TagChecksum);
return dataChk == header.DataChecksum && tagsChk == header.TagChecksum;
}
public override bool ImageHasPartitions()
{
return ImageInfo.ImageHasPartitions;
}
public override ulong GetImageSize()
{
return ImageInfo.ImageSize;
}
public override ulong GetSectors()
{
return ImageInfo.Sectors;
}
public override uint GetSectorSize()
{
return ImageInfo.SectorSize;
}
public override byte[] ReadSector(ulong sectorAddress)
{
return ReadSectors(sectorAddress, 1);
}
public override byte[] ReadSectorTag(ulong sectorAddress, SectorTagType tag)
{
return ReadSectorsTag(sectorAddress, 1, tag);
}
public override 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");
byte[] buffer = new byte[length * ImageInfo.SectorSize];
if(twiggy)
Array.Copy(twiggyCache, (int)sectorAddress * ImageInfo.SectorSize, buffer, 0,
length * ImageInfo.SectorSize);
else
{
Stream stream = dc42ImageFilter.GetDataForkStream();
stream.Seek((long)(dataOffset + sectorAddress * ImageInfo.SectorSize), SeekOrigin.Begin);
stream.Read(buffer, 0, (int)(length * ImageInfo.SectorSize));
}
return buffer;
}
public override byte[] ReadSectorsTag(ulong sectorAddress, uint length, SectorTagType tag)
{
if(tag != SectorTagType.AppleSectorTag)
throw new FeatureUnsupportedImageException($"Tag {tag} not supported by image format");
if(header.TagSize == 0) throw new FeatureNotPresentImageException("Disk image does not have tags");
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");
byte[] buffer = new byte[length * bptag];
if(twiggy) Array.Copy(twiggyCacheTags, (int)sectorAddress * bptag, buffer, 0, length * bptag);
else
{
Stream stream = dc42ImageFilter.GetDataForkStream();
stream.Seek((long)(tagOffset + sectorAddress * bptag), SeekOrigin.Begin);
stream.Read(buffer, 0, (int)(length * bptag));
}
return buffer;
}
public override byte[] ReadSectorLong(ulong sectorAddress)
{
return ReadSectorsLong(sectorAddress, 1);
}
public override byte[] ReadSectorsLong(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");
byte[] data = ReadSectors(sectorAddress, length);
byte[] tags = ReadSectorsTag(sectorAddress, length, SectorTagType.AppleSectorTag);
byte[] buffer = new byte[data.Length + tags.Length];
for(uint i = 0; i < length; i++)
{
Array.Copy(data, i * ImageInfo.SectorSize, buffer, i * (ImageInfo.SectorSize + bptag),
ImageInfo.SectorSize);
Array.Copy(tags, i * bptag, buffer, i * (ImageInfo.SectorSize + bptag) + ImageInfo.SectorSize, bptag);
}
return buffer;
}
public override string GetImageFormat()
{
return "Apple DiskCopy 4.2";
}
public override string GetImageVersion()
{
return ImageInfo.ImageVersion;
}
public override string GetImageApplication()
{
return ImageInfo.ImageApplication;
}
public override string GetImageApplicationVersion()
{
return ImageInfo.ImageApplicationVersion;
}
public override DateTime GetImageCreationTime()
{
return ImageInfo.ImageCreationTime;
}
public override DateTime GetImageLastModificationTime()
{
return ImageInfo.ImageLastModificationTime;
}
public override string GetImageName()
{
return ImageInfo.ImageName;
}
public override MediaType GetMediaType()
{
return ImageInfo.MediaType;
}
#region Unsupported features
public override byte[] ReadDiskTag(MediaTagType tag)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public override string GetImageCreator()
{
return ImageInfo.ImageCreator;
}
public override string GetImageComments()
{
return ImageInfo.ImageComments;
}
public override string GetMediaManufacturer()
{
return ImageInfo.MediaManufacturer;
}
public override string GetMediaModel()
{
return ImageInfo.MediaModel;
}
public override string GetMediaSerialNumber()
{
return ImageInfo.MediaSerialNumber;
}
public override string GetMediaBarcode()
{
return ImageInfo.MediaBarcode;
}
public override string GetMediaPartNumber()
{
return ImageInfo.MediaPartNumber;
}
public override int GetMediaSequence()
{
return ImageInfo.MediaSequence;
}
public override int GetLastDiskSequence()
{
return ImageInfo.LastMediaSequence;
}
public override string GetDriveManufacturer()
{
return ImageInfo.DriveManufacturer;
}
public override string GetDriveModel()
{
return ImageInfo.DriveModel;
}
public override string GetDriveSerialNumber()
{
return ImageInfo.DriveSerialNumber;
}
public override List<Partition> GetPartitions()
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public override List<Track> GetTracks()
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public override List<Track> GetSessionTracks(Session session)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public override List<Track> GetSessionTracks(ushort session)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public override List<Session> GetSessions()
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public override byte[] ReadSector(ulong sectorAddress, uint track)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public override byte[] ReadSectorTag(ulong sectorAddress, uint track, SectorTagType tag)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public override byte[] ReadSectors(ulong sectorAddress, uint length, uint track)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public override byte[] ReadSectorsTag(ulong sectorAddress, uint length, uint track, SectorTagType tag)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public override byte[] ReadSectorLong(ulong sectorAddress, uint track)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public override byte[] ReadSectorsLong(ulong sectorAddress, uint length, uint track)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
#endregion Unsupported features
#region Private methods
static uint DC42CheckSum(byte[] buffer)
{
uint dc42Chk = 0;
if((buffer.Length & 0x01) == 0x01) return 0xFFFFFFFF;
for(uint i = 0; i < buffer.Length; i += 2)
{
dc42Chk += (uint)(buffer[i] << 8);
dc42Chk += buffer[i + 1];
dc42Chk = (dc42Chk >> 1) | (dc42Chk << 31);
}
return dc42Chk;
}
#endregion
}
}
Reference in New Issue View Git Blame Copy Permalink