Added support for AO-DOS filesystem.

DiscImageChef.Filesystems/AODOS.cs

@@ -0,0 +1,218 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : AODOS.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Commodore file system plugin.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Identifies the AO-DOS file system 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 <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2017 Natalia Portillo
+// ****************************************************************************/
+
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using System.Text;
+using DiscImageChef.CommonTypes;
+using System.Linq;
+
+namespace DiscImageChef.Filesystems
+{
+    // Information has been extracted looking at available disk images
+    // This may be missing fields, or not, I don't know russian so any help is appreciated
+    public class AODOS : Filesystem
+    {
+        public AODOS()
+        {
+            Name = "Alexander Osipov DOS file system";
+            PluginUUID = new Guid("668E5039-9DDD-442A-BE1B-A315D6E38E26");
+            CurrentEncoding = Encoding.GetEncoding("koi8-r");
+        }
+
+        public AODOS(ImagePlugins.ImagePlugin imagePlugin, Partition partition, Encoding encoding)
+        {
+            Name = "Alexander Osipov DOS file system";
+            PluginUUID = new Guid("668E5039-9DDD-442A-BE1B-A315D6E38E26");
+            CurrentEncoding = Encoding.GetEncoding("koi8-r");
+        }
+
+        [StructLayout(LayoutKind.Sequential, Pack = 1)]
+        struct AODOS_BootBlock
+        {
+            /// <summary>
+            /// A NOP opcode
+            /// </summary>
+            public byte nop;
+            /// <summary>
+            /// A branch to real bootloader
+            /// </summary>
+            public ushort branch;
+            /// <summary>
+            /// Unused
+            /// </summary>
+            public byte unused;
+            /// <summary>
+            /// " AO-DOS "
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+            public byte[] identifier;
+            /// <summary>
+            /// Volume label
+            /// </summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+            public byte[] volumeLabel;
+            /// <summary>
+            /// How many files are present in disk
+            /// </summary>
+            public ushort files;
+            /// <summary>
+            /// How many sectors are used
+            /// </summary>
+            public ushort usedSectors;
+        }
+
+        readonly byte[] AODOSIdentifier = { 0x20, 0x41, 0x4F, 0x2D, 0x44, 0x4F, 0x53, 0x20 };
+
+        public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, Partition partition)
+        {
+            // Does AO-DOS support hard disks?
+            if(partition.Start > 0)
+                return false;
+
+            // How is it really?
+            if(imagePlugin.ImageInfo.sectorSize != 512)
+                return false;
+
+            // Does AO-DOS support any other kind of disk?
+            if(imagePlugin.ImageInfo.sectors != 800 && imagePlugin.ImageInfo.sectors != 1600)
+                return false;
+
+            byte[] sector;
+
+            sector = imagePlugin.ReadSector(0);
+            AODOS_BootBlock bb = new AODOS_BootBlock();
+            IntPtr bbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(bb));
+            Marshal.Copy(sector, 0, bbPtr, Marshal.SizeOf(bb));
+            bb = (AODOS_BootBlock)Marshal.PtrToStructure(bbPtr, typeof(AODOS_BootBlock));
+            Marshal.FreeHGlobal(bbPtr);
+
+            return bb.identifier.SequenceEqual(AODOSIdentifier);
+        }
+
+        public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, Partition partition, out string information)
+        {
+            byte[] sector;
+
+            sector = imagePlugin.ReadSector(0);
+            AODOS_BootBlock bb = new AODOS_BootBlock();
+            IntPtr bbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(bb));
+            Marshal.Copy(sector, 0, bbPtr, Marshal.SizeOf(bb));
+            bb = (AODOS_BootBlock)Marshal.PtrToStructure(bbPtr, typeof(AODOS_BootBlock));
+            Marshal.FreeHGlobal(bbPtr);
+
+            StringBuilder sbInformation = new StringBuilder();
+
+            sbInformation.AppendLine("Alexander Osipov DOS file system");
+
+            xmlFSType = new Schemas.FileSystemType
+            {
+                Type = "Alexander Osipov DOS file system",
+                Clusters = (long)imagePlugin.ImageInfo.sectors,
+                ClusterSize = (int)imagePlugin.ImageInfo.sectorSize,
+                Files = bb.files,
+                FilesSpecified = true,
+                FreeClusters = (long)(imagePlugin.ImageInfo.sectors - bb.usedSectors),
+                FreeClustersSpecified = true,
+                VolumeName = StringHandlers.SpacePaddedToString(bb.volumeLabel, CurrentEncoding),
+                Bootable = true
+            };
+
+            sbInformation.AppendFormat("{0} files on volume", bb.files).AppendLine();
+            sbInformation.AppendFormat("{0} used sectors on volume", bb.usedSectors).AppendLine();
+            sbInformation.AppendFormat("Disk name: {0}", StringHandlers.CToString(bb.volumeLabel, CurrentEncoding)).AppendLine();
+
+            information = sbInformation.ToString();
+        }
+
+        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;
+        }
+
+        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;
+        }
+
+        public override Errno ReadLink(string path, ref string dest)
+        {
+            return Errno.NotImplemented;
+        }
+    }
+}

DiscImageChef.Filesystems/DiscImageChef.Filesystems.csproj

@@ -131,6 +131,7 @@
     <Compile Include="EFS.cs" />
     <Compile Include="UNICOS.cs" />
     <Compile Include="RBF.cs" />
+    <Compile Include="AODOS.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>

README.md

@@ -112,6 +112,7 @@ Supported file systems for identification and information only
 ==============================================================
 * 3DO Opera file system
 * Acorn Advanced Disc Filing System
+* Alexander Osipov DOS (AO-DOS for Electronika BK-0011) file system
 * Amiga Fast File System v2, untested
 * Amiga Fast File System, with international characters, directory cache and multi-user patches
 * Amiga Original File System, with international characters, directory cache and multi-user patches