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Added support for U.C.S.D. Pascal filesystem, closes #31

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This commit is contained in:
Natalia Portillo
2016-07-31 20:56:53 +01:00
parent 8de5e47b3b
commit d4fa3b3e1b
13 changed files with 499 additions and 262 deletions
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252
DiscImageChef.Filesystems/UCSDPascal/UCSDPascal.cs
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@@ -9,7 +9,7 @@
//
// --[ Description ] ----------------------------------------------------------
//
// Identifies the U.C.S.D. Pascal filesystem and shows information.
// Constructors and common variables for the U.C.S.D. Pascal filesystem plugin.
//
// --[ License ] --------------------------------------------------------------
//
@@ -32,266 +32,48 @@
using System;
using System.Collections.Generic;
using System.Text;
using DiscImageChef.ImagePlugins;
namespace DiscImageChef.Filesystems
namespace DiscImageChef.Filesystems.UCSDPascal
{
// Information from Call-A.P.P.L.E. Pascal Disk Directory Structure
public class PascalPlugin : Filesystem
public partial class PascalPlugin : Filesystem
{
bool mounted;
bool debug;
readonly ImagePlugin device;
PascalVolumeEntry mountedVolEntry;
List<PascalFileEntry> fileEntries;
byte[] bootBlocks;
byte[] catalogBlocks;
public PascalPlugin()
{
Name = "U.C.S.D. Pascal filesystem";
PluginUUID = new Guid("B0AC2CB5-72AA-473A-9200-270B5A2C2D53");
}
public PascalPlugin(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd)
public PascalPlugin(ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd)
{
device = imagePlugin;
Name = "U.C.S.D. Pascal filesystem";
PluginUUID = new Guid("B0AC2CB5-72AA-473A-9200-270B5A2C2D53");
}
public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd)
{
if(imagePlugin.GetSectors() < 3)
return false;
// Blocks 0 and 1 are boot code
byte[] volBlock = imagePlugin.ReadSector(2 + partitionStart);
PascalVolumeEntry volEntry = new PascalVolumeEntry();
BigEndianBitConverter.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 false;
// Last volume record block must be after first block, and before end of device
if(volEntry.lastBlock <= volEntry.firstBlock || (ulong)volEntry.lastBlock > imagePlugin.GetSectors() - 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.GetSectors())
return false;
// There can be not less than zero files
if(volEntry.files < 0)
return false;
return true;
}
public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd, out string information)
{
StringBuilder sbInformation = new StringBuilder();
information = "";
if(imagePlugin.GetSectors() < 3)
return;
// Blocks 0 and 1 are boot code
byte[] volBlock = imagePlugin.ReadSector(2 + partitionStart);
PascalVolumeEntry volEntry = new PascalVolumeEntry();
BigEndianBitConverter.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.GetSectors() - 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.GetSectors())
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)).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();
byte[] bootBlocks = imagePlugin.ReadSectors(partitionStart, 2);
xmlFSType = new Schemas.FileSystemType();
xmlFSType.Bootable = !ArrayHelpers.ArrayIsNullOrEmpty(bootBlocks);
xmlFSType.Clusters = volEntry.blocks;
xmlFSType.ClusterSize = (int)imagePlugin.GetSectorSize();
xmlFSType.Files = volEntry.files;
xmlFSType.FilesSpecified = true;
xmlFSType.Type = "UCSD Pascal";
xmlFSType.VolumeName = StringHandlers.PascalToString(volEntry.volumeName);
return;
}
enum PascalFileKind : short
{
/// <summary>Disk volume entry</summary>
Volume = 0,
/// <summary>File containing bad blocks</summary>
Bad,
/// <summary>Code file, machine executable</summary>
Code,
/// <summary>Text file, human readable</summary>
Text,
/// <summary>Information file for debugger</summary>
Info,
/// <summary>Data file</summary>
Data,
/// <summary>Graphics vectors</summary>
Graf,
/// <summary>Graphics screen image</summary>
Foto,
/// <summary>Security, not used</summary>
Secure
}
struct PascalVolumeEntry
{
/// <summary>0x00, first block of volume entry</summary>
public short firstBlock;
/// <summary>0x02, last block of volume entry</summary>
public short lastBlock;
/// <summary>0x04, entry type</summary>
public PascalFileKind entryType;
/// <summary>0x06, volume name</summary>
public byte[] volumeName;
/// <summary>0x0E, block in volume</summary>
public short blocks;
/// <summary>0x10, files in volume</summary>
public short files;
/// <summary>0x12, dummy</summary>
public short dummy;
/// <summary>0x14, last booted</summary>
public short lastBoot;
/// <summary>0x16, tail to make record same size as <see cref="PascalFileEntry"/></summary>
public int tail;
}
struct PascalFileEntry
{
/// <summary>0x00, first block of file</summary>
public short firstBlock;
/// <summary>0x02, last block of file</summary>
public short lastBlock;
/// <summary>0x04, entry type</summary>
public PascalFileKind entryType;
/// <summary>0x06, file name</summary>
public byte[] filename;
/// <summary>0x16, bytes used in last block</summary>
public short lastBytes;
/// <summary>0x18, modification time</summary>
public short mtime;
}
public override Errno Mount()
{
return Errno.NotImplemented;
}
public override Errno Mount(bool debug)
{
return Errno.NotImplemented;
}
public override Errno Unmount()
{
return Errno.NotImplemented;
}
public override Errno MapBlock(string path, long fileBlock, ref long deviceBlock)
{
return Errno.NotImplemented;
}
public override Errno GetAttributes(string path, ref FileAttributes attributes)
{
return Errno.NotImplemented;
}
public override Errno ListXAttr(string path, ref List<string> xattrs)
{
return Errno.NotImplemented;
return Errno.NotSupported;
}
public override Errno GetXattr(string path, string xattr, ref byte[] buf)
{
return Errno.NotImplemented;
}
public override Errno Read(string path, long offset, long size, ref byte[] buf)
{
return Errno.NotImplemented;
}
public override Errno ReadDir(string path, ref List<string> contents)
{
return Errno.NotImplemented;
}
public override Errno StatFs(ref FileSystemInfo stat)
{
return Errno.NotImplemented;
}
public override Errno Stat(string path, ref FileEntryInfo stat)
{
return Errno.NotImplemented;
return Errno.NotSupported;
}
public override Errno ReadLink(string path, ref string dest)
{
return Errno.NotImplemented;
return Errno.NotSupported;
}
}
}