// /*************************************************************************** // The Disc Image Chef // ---------------------------------------------------------------------------- // // Filename : Info.cs // Author(s) : Natalia Portillo // // Component : U.C.S.D. Pascal filesystem plugin. // // --[ Description ] ---------------------------------------------------------- // // Identifies the U.C.S.D. Pascal filesystem and shows information. // // --[ 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 . // // ---------------------------------------------------------------------------- // Copyright © 2011-2018 Natalia Portillo // ****************************************************************************/ using System; using System.Text; using Claunia.Encoding; using DiscImageChef.CommonTypes; using DiscImageChef.Console; using DiscImageChef.DiscImages; using Schemas; using Encoding = System.Text.Encoding; namespace DiscImageChef.Filesystems.UCSDPascal { // Information from Call-A.P.P.L.E. Pascal Disk Directory Structure public partial class PascalPlugin { public bool Identify(IMediaImage imagePlugin, Partition partition) { if(partition.Length < 3) return false; multiplier = (uint)(imagePlugin.Info.SectorSize == 256 ? 2 : 1); // Blocks 0 and 1 are boot code byte[] volBlock = imagePlugin.ReadSectors(multiplier * 2 + partition.Start, multiplier); PascalVolumeEntry volEntry = new PascalVolumeEntry(); // On Apple II, it's little endian BigEndianBitConverter.IsLittleEndian = multiplier == 2 ? !BitConverter.IsLittleEndian : BitConverter.IsLittleEndian; volEntry.FirstBlock = BigEndianBitConverter.ToInt16(volBlock, 0x00); volEntry.LastBlock = BigEndianBitConverter.ToInt16(volBlock, 0x02); volEntry.EntryType = (PascalFileKind)BigEndianBitConverter.ToInt16(volBlock, 0x04); volEntry.VolumeName = new byte[8]; Array.Copy(volBlock, 0x06, volEntry.VolumeName, 0, 8); volEntry.Blocks = BigEndianBitConverter.ToInt16(volBlock, 0x0E); volEntry.Files = BigEndianBitConverter.ToInt16(volBlock, 0x10); volEntry.Dummy = BigEndianBitConverter.ToInt16(volBlock, 0x12); volEntry.LastBoot = BigEndianBitConverter.ToInt16(volBlock, 0x14); volEntry.Tail = BigEndianBitConverter.ToInt32(volBlock, 0x16); DicConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.firstBlock = {0}", volEntry.FirstBlock); DicConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.lastBlock = {0}", volEntry.LastBlock); DicConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.entryType = {0}", volEntry.EntryType); DicConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.volumeName = {0}", volEntry.VolumeName); DicConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.blocks = {0}", volEntry.Blocks); DicConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.files = {0}", volEntry.Files); DicConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.dummy = {0}", volEntry.Dummy); DicConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.lastBoot = {0}", volEntry.LastBoot); DicConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.tail = {0}", volEntry.Tail); // First block is always 0 (even is it's sector 2) if(volEntry.FirstBlock != 0) return false; // Last volume record block must be after first block, and before end of device if(volEntry.LastBlock <= volEntry.FirstBlock || (ulong)volEntry.LastBlock > imagePlugin.Info.Sectors / multiplier - 2) return false; // Volume record entry type must be volume or secure if(volEntry.EntryType != PascalFileKind.Volume && volEntry.EntryType != PascalFileKind.Secure) return false; // Volume name is max 7 characters if(volEntry.VolumeName[0] > 7) return false; // Volume blocks is equal to volume sectors if(volEntry.Blocks < 0 || (ulong)volEntry.Blocks != imagePlugin.Info.Sectors / multiplier) return false; // There can be not less than zero files return volEntry.Files >= 0; } public void GetInformation(IMediaImage imagePlugin, Partition partition, out string information, Encoding encoding) { Encoding = encoding ?? new Apple2(); StringBuilder sbInformation = new StringBuilder(); information = ""; multiplier = (uint)(imagePlugin.Info.SectorSize == 256 ? 2 : 1); if(imagePlugin.Info.Sectors < 3) return; // Blocks 0 and 1 are boot code byte[] volBlock = imagePlugin.ReadSectors(multiplier * 2 + partition.Start, multiplier); PascalVolumeEntry volEntry = new PascalVolumeEntry(); // On Apple //, it's little endian BigEndianBitConverter.IsLittleEndian = multiplier == 2 ? !BitConverter.IsLittleEndian : BitConverter.IsLittleEndian; volEntry.FirstBlock = BigEndianBitConverter.ToInt16(volBlock, 0x00); volEntry.LastBlock = BigEndianBitConverter.ToInt16(volBlock, 0x02); volEntry.EntryType = (PascalFileKind)BigEndianBitConverter.ToInt16(volBlock, 0x04); volEntry.VolumeName = new byte[8]; Array.Copy(volBlock, 0x06, volEntry.VolumeName, 0, 8); volEntry.Blocks = BigEndianBitConverter.ToInt16(volBlock, 0x0E); volEntry.Files = BigEndianBitConverter.ToInt16(volBlock, 0x10); volEntry.Dummy = BigEndianBitConverter.ToInt16(volBlock, 0x12); volEntry.LastBoot = BigEndianBitConverter.ToInt16(volBlock, 0x14); volEntry.Tail = BigEndianBitConverter.ToInt32(volBlock, 0x16); // First block is always 0 (even is it's sector 2) if(volEntry.FirstBlock != 0) return; // Last volume record block must be after first block, and before end of device if(volEntry.LastBlock <= volEntry.FirstBlock || (ulong)volEntry.LastBlock > imagePlugin.Info.Sectors / multiplier - 2) return; // Volume record entry type must be volume or secure if(volEntry.EntryType != PascalFileKind.Volume && volEntry.EntryType != PascalFileKind.Secure) return; // Volume name is max 7 characters if(volEntry.VolumeName[0] > 7) return; // Volume blocks is equal to volume sectors if(volEntry.Blocks < 0 || (ulong)volEntry.Blocks != imagePlugin.Info.Sectors / multiplier) return; // There can be not less than zero files if(volEntry.Files < 0) return; sbInformation.AppendFormat("Volume record spans from block {0} to block {1}", volEntry.FirstBlock, volEntry.LastBlock).AppendLine(); sbInformation.AppendFormat("Volume name: {0}", StringHandlers.PascalToString(volEntry.VolumeName, Encoding)) .AppendLine(); sbInformation.AppendFormat("Volume has {0} blocks", volEntry.Blocks).AppendLine(); sbInformation.AppendFormat("Volume has {0} files", volEntry.Files).AppendLine(); sbInformation .AppendFormat("Volume last booted at {0}", DateHandlers.UcsdPascalToDateTime(volEntry.LastBoot)) .AppendLine(); information = sbInformation.ToString(); XmlFsType = new FileSystemType { Bootable = !ArrayHelpers.ArrayIsNullOrEmpty(imagePlugin.ReadSectors(partition.Start, multiplier * 2)), Clusters = volEntry.Blocks, ClusterSize = (int)imagePlugin.Info.SectorSize, Files = volEntry.Files, FilesSpecified = true, Type = "UCSD Pascal", VolumeName = StringHandlers.PascalToString(volEntry.VolumeName, Encoding) }; } } }