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

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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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103
DiscImageChef.Filesystems/UCSDPascal/Super.cs
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@@ -5,11 +5,11 @@
// Filename : Super.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Component
// Component : U.C.S.D. Pascal filesystem plugin.
//
// --[ Description ] ----------------------------------------------------------
//
// Description
// Handles mounting and umounting the U.C.S.D. Pascal filesystem.
//
// --[ License ] --------------------------------------------------------------
//
@@ -29,13 +29,108 @@
// ----------------------------------------------------------------------------
// Copyright © 2011-2016 Natalia Portillo
// ****************************************************************************/
using System;
using System.Collections.Generic;
namespace DiscImageChef.Filesystems.UCSDPascal
{
public class Super
// Information from Call-A.P.P.L.E. Pascal Disk Directory Structure
public partial class PascalPlugin : Filesystem
{
public Super()
public override Errno Mount()
{
return Mount(false);
}
public override Errno Mount(bool debug)
{
this.debug = debug;
if(device.GetSectors() < 3)
return Errno.InvalidArgument;
// Blocks 0 and 1 are boot code
catalogBlocks = device.ReadSector(2);
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
mountedVolEntry.firstBlock = BigEndianBitConverter.ToInt16(catalogBlocks, 0x00);
mountedVolEntry.lastBlock = BigEndianBitConverter.ToInt16(catalogBlocks, 0x02);
mountedVolEntry.entryType = (PascalFileKind)BigEndianBitConverter.ToInt16(catalogBlocks, 0x04);
mountedVolEntry.volumeName = new byte[8];
Array.Copy(catalogBlocks, 0x06, mountedVolEntry.volumeName, 0, 8);
mountedVolEntry.blocks = BigEndianBitConverter.ToInt16(catalogBlocks, 0x0E);
mountedVolEntry.files = BigEndianBitConverter.ToInt16(catalogBlocks, 0x10);
mountedVolEntry.dummy = BigEndianBitConverter.ToInt16(catalogBlocks, 0x12);
mountedVolEntry.lastBoot = BigEndianBitConverter.ToInt16(catalogBlocks, 0x14);
mountedVolEntry.tail = BigEndianBitConverter.ToInt32(catalogBlocks, 0x16);
if(mountedVolEntry.firstBlock != 0 || mountedVolEntry.lastBlock <= mountedVolEntry.firstBlock ||
(ulong)mountedVolEntry.lastBlock > device.GetSectors() - 2 ||
(mountedVolEntry.entryType != PascalFileKind.Volume && mountedVolEntry.entryType != PascalFileKind.Secure) ||
mountedVolEntry.volumeName[0] > 7 || mountedVolEntry.blocks < 0 || (ulong)mountedVolEntry.blocks != device.GetSectors() ||
mountedVolEntry.files < 0)
return Errno.InvalidArgument;
catalogBlocks = device.ReadSectors(2, (uint)(mountedVolEntry.lastBlock - mountedVolEntry.firstBlock - 2));
int offset = 26;
fileEntries = new List<PascalFileEntry>();
while(offset + 26 < catalogBlocks.Length)
{
PascalFileEntry entry = new PascalFileEntry();
entry.filename = new byte[16];
entry.firstBlock = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x00);
entry.lastBlock = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x02);
entry.entryType = (PascalFileKind)BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x04);
Array.Copy(catalogBlocks, offset + 0x06, entry.filename, 0, 16);
entry.lastBytes = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x16);
entry.mtime = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x18);
if(entry.filename[0] <= 15 && entry.filename[0] > 0)
fileEntries.Add(entry);
offset += 26;
}
bootBlocks = device.ReadSectors(0, 2);
xmlFSType = new Schemas.FileSystemType();
xmlFSType.Bootable = !ArrayHelpers.ArrayIsNullOrEmpty(bootBlocks);
xmlFSType.Clusters = mountedVolEntry.blocks;
xmlFSType.ClusterSize = (int)device.GetSectorSize();
xmlFSType.Files = mountedVolEntry.files;
xmlFSType.FilesSpecified = true;
xmlFSType.Type = "UCSD Pascal";
xmlFSType.VolumeName = StringHandlers.PascalToString(mountedVolEntry.volumeName);
mounted = true;
return Errno.NoError;
}
public override Errno Unmount()
{
mounted = false;
fileEntries = null;
return Errno.NoError;
}
public override Errno StatFs(ref FileSystemInfo stat)
{
stat = new FileSystemInfo();
stat.Blocks = mountedVolEntry.blocks;
stat.FilenameLength = 16;
stat.Files = (ulong)mountedVolEntry.files;
stat.FreeBlocks = 0;
stat.PluginId = PluginUUID;
stat.Type = "UCSD Pascal";
stat.FreeBlocks = mountedVolEntry.blocks - (mountedVolEntry.lastBlock - mountedVolEntry.firstBlock + 1);
foreach(PascalFileEntry entry in fileEntries)
stat.FreeBlocks -= (entry.lastBlock - entry.firstBlock + 1);
return Errno.NotImplemented;
}
}
}