Adds support for Apple DOS filesystem, closes #33.

2025-12-16 19:24:25 +00:00 · 2016-10-07 00:41:59 +01:00
parent 93e86637c1
commit 7483d004b7
12 changed files with 1091 additions and 4 deletions
--- a/DiscImageChef.Filesystems/AppleDOS/Info.cs
+++ b/DiscImageChef.Filesystems/AppleDOS/Info.cs
@@ -0,0 +1,106 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : Info.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Apple DOS filesystem plugin.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Identifies the Apple DOS filesystem 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 © 2011-2016 Natalia Portillo
+// ****************************************************************************/
+
+using System;
+using System.Runtime.InteropServices;
+using System.Text;
+using DiscImageChef.ImagePlugins;
+
+namespace DiscImageChef.Filesystems.AppleDOS
+{
+    partial class AppleDOS : Filesystem
+    {
+        public override bool Identify(ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd)
+        {
+            if(imagePlugin.ImageInfo.sectors != 455 && imagePlugin.ImageInfo.sectors != 560)
+                return false;
+
+            if(partitionStart > 0 || imagePlugin.ImageInfo.sectorSize != 256)
+                return false;
+
+            int spt = 0;
+            if(imagePlugin.ImageInfo.sectors == 455)
+                spt = 13;
+            else
+                spt = 16;
+
+            byte[] vtoc_b = imagePlugin.ReadSector((ulong)(17 * spt));
+            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);
+
+            return vtoc.catalogSector < spt && vtoc.maxTrackSectorPairsPerSector <= 122 && vtoc.sectorsPerTrack == spt && vtoc.bytesPerSector == 256;
+        }
+
+        public override void GetInformation(ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd, out string information)
+        {
+            information = "";
+            StringBuilder sb = new StringBuilder();
+
+            int spt = 0;
+            if(imagePlugin.ImageInfo.sectors == 455)
+                spt = 13;
+            else
+                spt = 16;
+
+            byte[] vtoc_b = imagePlugin.ReadSector((ulong)(17 * spt));
+            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);
+
+            sb.AppendLine("Apple DOS File System");
+            sb.AppendLine();
+            sb.AppendFormat("Catalog starts at sector {0} of track {1}", vtoc.catalogSector, vtoc.catalogTrack).AppendLine();
+            sb.AppendFormat("File system initialized by DOS release {0}", vtoc.dosRelease).AppendLine();
+            sb.AppendFormat("Disk volume number {0}", vtoc.volumeNumber).AppendLine();
+            sb.AppendFormat("Sectors allocated at most in track {0}", vtoc.lastAllocatedSector).AppendLine();
+            sb.AppendFormat("{0} tracks in volume", vtoc.tracks).AppendLine();
+            sb.AppendFormat("{0} sectors per track", vtoc.sectorsPerTrack).AppendLine();
+            sb.AppendFormat("{0} bytes per sector", vtoc.bytesPerSector).AppendLine();
+            sb.AppendFormat("Track allocation is {0}", vtoc.allocationDirection > 0 ? "forward" : "reverse").AppendLine();
+
+            information = sb.ToString();
+
+            xmlFSType = new Schemas.FileSystemType();
+            xmlFSType.Bootable = true;
+            xmlFSType.Clusters = (long)imagePlugin.ImageInfo.sectors;
+            xmlFSType.ClusterSize = (int)imagePlugin.ImageInfo.sectorSize;
+            xmlFSType.Type = "Apple DOS";
+
+            return;
+        }
+    }
+}