Adds support for Apple DOS filesystem, closes #33.

DiscImageChef.Filesystems/AppleDOS/Super.cs

@@ -0,0 +1,153 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : Super.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Apple DOS filesystem plugin.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Handles mounting and umounting the Apple DOS filesystem.
+//
+// --[ 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 © 2011-2016 Natalia Portillo
+// ****************************************************************************/
+
+using System;
+using System.Runtime.InteropServices;
+using DiscImageChef.Console;
+
+namespace DiscImageChef.Filesystems.AppleDOS
+{
+    partial class AppleDOS : Filesystem
+    {
+        /// <summary>
+        /// Mounts an Apple Lisa filesystem
+        /// </summary>
+        public override Errno Mount()
+        {
+            return Mount(false);
+        }
+
+        /// <summary>
+        /// Mounts an Apple Lisa filesystem
+        /// </summary>
+        public override Errno Mount(bool debug)
+        {
+            if(device.ImageInfo.sectors != 455 && device.ImageInfo.sectors != 560)
+            {
+                DicConsole.DebugWriteLine("Apple DOS plugin", "Incorrect device size.");
+                return Errno.InOutError;
+            }
+
+            if(start > 0)
+            {
+                DicConsole.DebugWriteLine("Apple DOS plugin", "Partitions are not supported.");
+                return Errno.InOutError;
+            }
+
+            if(device.ImageInfo.sectorSize != 256)
+            {
+                DicConsole.DebugWriteLine("Apple DOS plugin", "Incorrect sector size.");
+                return Errno.InOutError;
+            }
+
+            if(device.ImageInfo.sectors == 455)
+                sectorsPerTrack = 13;
+            else
+                sectorsPerTrack = 16;
+
+            // Read the VTOC
+            byte[] vtoc_b = device.ReadSector((ulong)(17 * sectorsPerTrack));
+            vtoc = new VTOC();
+            IntPtr vtocPtr = Marshal.AllocHGlobal(256);
+            Marshal.Copy(vtoc_b, 0, vtocPtr, 256);
+            vtoc = (VTOC)Marshal.PtrToStructure(vtocPtr, typeof(VTOC));
+            Marshal.FreeHGlobal(vtocPtr);
+
+            track1UsedByFiles = false;
+            track2UsedByFiles = false;
+            usedSectors = 1;
+
+            Errno error;
+
+            error = ReadCatalog();
+            if(error != Errno.NoError)
+            {
+                DicConsole.DebugWriteLine("Apple DOS plugin", "Unable to read catalog.");
+                return error;
+            }
+
+            error = CacheAllFiles();
+            if(error != Errno.NoError)
+            {
+                DicConsole.DebugWriteLine("Apple DOS plugin", "Unable cache all files.");
+                return error;
+            }
+
+            // Create XML metadata for mounted filesystem
+            xmlFSType = new Schemas.FileSystemType();
+            xmlFSType.Bootable = true;
+            xmlFSType.Clusters = (long)device.ImageInfo.sectors;
+            xmlFSType.ClusterSize = vtoc.bytesPerSector;
+            xmlFSType.Files = catalogCache.Count;
+            xmlFSType.FilesSpecified = true;
+            xmlFSType.FreeClusters = xmlFSType.Clusters - usedSectors;
+            xmlFSType.FreeClustersSpecified = true;
+            xmlFSType.Type = "Apple DOS";
+
+            this.debug = debug;
+            mounted = true;
+            return Errno.NoError;
+        }
+
+        /// <summary>
+        /// Umounts this Lisa filesystem
+        /// </summary>
+        public override Errno Unmount()
+        {
+            mounted = false;
+            extentCache = null;
+            fileCache = null;
+            catalogCache = null;
+            fileSizeCache = null;
+
+            return Errno.NoError;
+        }
+
+        /// <summary>
+        /// Gets information about the mounted volume.
+        /// </summary>
+        /// <param name="stat">Information about the mounted volume.</param>
+        public override Errno StatFs(ref FileSystemInfo stat)
+        {
+            stat = new FileSystemInfo();
+            stat.Blocks = (long)device.ImageInfo.sectors;
+            stat.FilenameLength = 30;
+            stat.Files = (ulong)catalogCache.Count;
+            stat.FreeBlocks = stat.Blocks - usedSectors;
+            stat.FreeFiles = totalFileEntries - stat.Files;
+            stat.PluginId = PluginUUID;
+            stat.Type = "Apple DOS";
+
+            return Errno.NoError;
+        }
+    }
+}