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

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

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

128
DiscImageChef.Filesystems/UCSDPascal/Info.cs
View File

@@ -5,11 +5,11 @@
// Filename : Info.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Component
// Component : U.C.S.D. Pascal filesystem plugin.
//
// --[ Description ] ----------------------------------------------------------
//
// Description
// Identifies the U.C.S.D. Pascal filesystem and shows information.
//
// --[ License ] --------------------------------------------------------------
//
@@ -29,13 +29,133 @@
// ----------------------------------------------------------------------------
// Copyright © 2011-2016 Natalia Portillo
// ****************************************************************************/
using System;
using System.Text;
namespace DiscImageChef.Filesystems.UCSDPascal
{
public class Info
// Information from Call-A.P.P.L.E. Pascal Disk Directory Structure
public partial class PascalPlugin : Filesystem
{
public Info()
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();
xmlFSType = new Schemas.FileSystemType();
xmlFSType.Bootable = !ArrayHelpers.ArrayIsNullOrEmpty(imagePlugin.ReadSectors(partitionStart, 2));
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;
}
}
}