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198 lines
10 KiB
C#
198 lines
10 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : Info.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Apple Macintosh File System plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies the Apple Macintosh File System and shows information.
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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.Text;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.DiscImages;
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using Schemas;
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namespace DiscImageChef.Filesystems.AppleMFS
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{
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// Information from Inside Macintosh Volume II
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public partial class AppleMFS
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{
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public override bool Identify(ImagePlugin imagePlugin, Partition partition)
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{
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ushort drSigWord;
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if(2 + partition.Start >= partition.End) return false;
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byte[] mdbSector = imagePlugin.ReadSector(2 + partition.Start);
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BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
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drSigWord = BigEndianBitConverter.ToUInt16(mdbSector, 0x000);
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return drSigWord == MFS_MAGIC;
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}
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public override void GetInformation(ImagePlugin imagePlugin, Partition partition, out string information)
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{
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information = "";
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StringBuilder sb = new StringBuilder();
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MFS_MasterDirectoryBlock MDB = new MFS_MasterDirectoryBlock();
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MFS_BootBlock BB = new MFS_BootBlock();
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byte[] pString = new byte[16];
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byte[] mdbSector = imagePlugin.ReadSector(2 + partition.Start);
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byte[] bbSector = imagePlugin.ReadSector(0 + partition.Start);
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BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
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MDB.drSigWord = BigEndianBitConverter.ToUInt16(mdbSector, 0x000);
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if(MDB.drSigWord != MFS_MAGIC) return;
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MDB.drCrDate = BigEndianBitConverter.ToUInt32(mdbSector, 0x002);
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MDB.drLsBkUp = BigEndianBitConverter.ToUInt32(mdbSector, 0x006);
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MDB.drAtrb = BigEndianBitConverter.ToUInt16(mdbSector, 0x00A);
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MDB.drNmFls = BigEndianBitConverter.ToUInt16(mdbSector, 0x00C);
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MDB.drDirSt = BigEndianBitConverter.ToUInt16(mdbSector, 0x00E);
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MDB.drBlLen = BigEndianBitConverter.ToUInt16(mdbSector, 0x010);
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MDB.drNmAlBlks = BigEndianBitConverter.ToUInt16(mdbSector, 0x012);
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MDB.drAlBlkSiz = BigEndianBitConverter.ToUInt32(mdbSector, 0x014);
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MDB.drClpSiz = BigEndianBitConverter.ToUInt32(mdbSector, 0x018);
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MDB.drAlBlSt = BigEndianBitConverter.ToUInt16(mdbSector, 0x01C);
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MDB.drNxtFNum = BigEndianBitConverter.ToUInt32(mdbSector, 0x01E);
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MDB.drFreeBks = BigEndianBitConverter.ToUInt16(mdbSector, 0x022);
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MDB.drVNSiz = mdbSector[0x024];
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byte[] variableSize = new byte[MDB.drVNSiz + 1];
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Array.Copy(mdbSector, 0x024, variableSize, 0, MDB.drVNSiz + 1);
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MDB.drVN = StringHandlers.PascalToString(variableSize, CurrentEncoding);
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BB.signature = BigEndianBitConverter.ToUInt16(bbSector, 0x000);
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if(BB.signature == MFSBB_MAGIC)
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{
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BB.branch = BigEndianBitConverter.ToUInt32(bbSector, 0x002);
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BB.boot_flags = bbSector[0x006];
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BB.boot_version = bbSector[0x007];
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BB.sec_sv_pages = BigEndianBitConverter.ToInt16(bbSector, 0x008);
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Array.Copy(mdbSector, 0x00A, pString, 0, 16);
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BB.system_name = StringHandlers.PascalToString(pString, CurrentEncoding);
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Array.Copy(mdbSector, 0x01A, pString, 0, 16);
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BB.finder_name = StringHandlers.PascalToString(pString, CurrentEncoding);
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Array.Copy(mdbSector, 0x02A, pString, 0, 16);
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BB.debug_name = StringHandlers.PascalToString(pString, CurrentEncoding);
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Array.Copy(mdbSector, 0x03A, pString, 0, 16);
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BB.disasm_name = StringHandlers.PascalToString(pString, CurrentEncoding);
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Array.Copy(mdbSector, 0x04A, pString, 0, 16);
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BB.stupscr_name = StringHandlers.PascalToString(pString, CurrentEncoding);
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Array.Copy(mdbSector, 0x05A, pString, 0, 16);
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BB.bootup_name = StringHandlers.PascalToString(pString, CurrentEncoding);
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Array.Copy(mdbSector, 0x06A, pString, 0, 16);
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BB.clipbrd_name = StringHandlers.PascalToString(pString, CurrentEncoding);
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BB.max_files = BigEndianBitConverter.ToUInt16(bbSector, 0x07A);
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BB.queue_size = BigEndianBitConverter.ToUInt16(bbSector, 0x07C);
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BB.heap_128k = BigEndianBitConverter.ToUInt32(bbSector, 0x07E);
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BB.heap_256k = BigEndianBitConverter.ToUInt32(bbSector, 0x082);
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BB.heap_512k = BigEndianBitConverter.ToUInt32(bbSector, 0x086);
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}
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else BB.signature = 0x0000;
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sb.AppendLine("Apple Macintosh File System");
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sb.AppendLine();
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sb.AppendLine("Master Directory Block:");
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sb.AppendFormat("Creation date: {0}", DateHandlers.MacToDateTime(MDB.drCrDate)).AppendLine();
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sb.AppendFormat("Last backup date: {0}", DateHandlers.MacToDateTime(MDB.drLsBkUp)).AppendLine();
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if((MDB.drAtrb & 0x80) == 0x80) sb.AppendLine("Volume is locked by hardware.");
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if((MDB.drAtrb & 0x8000) == 0x8000) sb.AppendLine("Volume is locked by software.");
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sb.AppendFormat("{0} files on volume", MDB.drNmFls).AppendLine();
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sb.AppendFormat("First directory sector: {0}", MDB.drDirSt).AppendLine();
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sb.AppendFormat("{0} sectors in directory.", MDB.drBlLen).AppendLine();
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sb.AppendFormat("{0} volume allocation blocks.", MDB.drNmAlBlks + 1).AppendLine();
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sb.AppendFormat("Size of allocation blocks: {0} bytes", MDB.drAlBlkSiz).AppendLine();
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sb.AppendFormat("{0} bytes to allocate.", MDB.drClpSiz).AppendLine();
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sb.AppendFormat("First allocation block (#2) starts in sector {0}.", MDB.drAlBlSt).AppendLine();
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sb.AppendFormat("Next unused file number: {0}", MDB.drNxtFNum).AppendLine();
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sb.AppendFormat("{0} unused allocation blocks.", MDB.drFreeBks).AppendLine();
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sb.AppendFormat("Volume name: {0}", MDB.drVN).AppendLine();
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if(BB.signature == MFSBB_MAGIC)
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{
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sb.AppendLine("Volume is bootable.");
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sb.AppendLine();
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sb.AppendLine("Boot Block:");
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if((BB.boot_flags & 0x40) == 0x40) sb.AppendLine("Boot block should be executed.");
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if((BB.boot_flags & 0x80) == 0x80) sb.AppendLine("Boot block is in new unknown format.");
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else
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{
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if(BB.sec_sv_pages > 0) sb.AppendLine("Allocate secondary sound buffer at boot.");
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else if(BB.sec_sv_pages < 0) sb.AppendLine("Allocate secondary sound and video buffers at boot.");
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sb.AppendFormat("System filename: {0}", BB.system_name).AppendLine();
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sb.AppendFormat("Finder filename: {0}", BB.finder_name).AppendLine();
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sb.AppendFormat("Debugger filename: {0}", BB.debug_name).AppendLine();
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sb.AppendFormat("Disassembler filename: {0}", BB.disasm_name).AppendLine();
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sb.AppendFormat("Startup screen filename: {0}", BB.stupscr_name).AppendLine();
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sb.AppendFormat("First program to execute at boot: {0}", BB.bootup_name).AppendLine();
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sb.AppendFormat("Clipboard filename: {0}", BB.clipbrd_name).AppendLine();
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sb.AppendFormat("Maximum opened files: {0}", BB.max_files * 4).AppendLine();
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sb.AppendFormat("Event queue size: {0}", BB.queue_size).AppendLine();
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sb.AppendFormat("Heap size with 128KiB of RAM: {0} bytes", BB.heap_128k).AppendLine();
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sb.AppendFormat("Heap size with 256KiB of RAM: {0} bytes", BB.heap_256k).AppendLine();
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sb.AppendFormat("Heap size with 512KiB of RAM or more: {0} bytes", BB.heap_512k).AppendLine();
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}
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}
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else sb.AppendLine("Volume is not bootable.");
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information = sb.ToString();
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XmlFsType = new FileSystemType();
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if(MDB.drLsBkUp > 0)
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{
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XmlFsType.BackupDate = DateHandlers.MacToDateTime(MDB.drLsBkUp);
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XmlFsType.BackupDateSpecified = true;
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}
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XmlFsType.Bootable = BB.signature == MFSBB_MAGIC;
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XmlFsType.Clusters = MDB.drNmAlBlks;
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XmlFsType.ClusterSize = (int)MDB.drAlBlkSiz;
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if(MDB.drCrDate > 0)
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{
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XmlFsType.CreationDate = DateHandlers.MacToDateTime(MDB.drCrDate);
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XmlFsType.CreationDateSpecified = true;
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}
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XmlFsType.Files = MDB.drNmFls;
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XmlFsType.FilesSpecified = true;
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XmlFsType.FreeClusters = MDB.drFreeBks;
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XmlFsType.FreeClustersSpecified = true;
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XmlFsType.Type = "MFS";
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XmlFsType.VolumeName = MDB.drVN;
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}
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}
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} |