[CBMFS] Implement full support for mounting, reading and extracting Commodore 1540/1541/1571/1581 filesystems.

Aaru.Filesystems/CBM/CBM.cs

@@ -27,15 +27,27 @@
 // ****************************************************************************/
 
 using System;
+using System.Collections.Generic;
+using Aaru.CommonTypes.AaruMetadata;
+using Aaru.CommonTypes.Enums;
 using Aaru.CommonTypes.Interfaces;
+using Aaru.CommonTypes.Structs;
 
 namespace Aaru.Filesystems;
 
 /// <inheritdoc />
 /// <summary>Implements detection of the filesystem used in 8-bit Commodore microcomputers</summary>
-public sealed partial class CBM : IFilesystem
+public sealed partial class CBM : IReadOnlyFilesystem
 {
-#region IFilesystem Members
+    byte[]                         _bam;
+    Dictionary<string, CachedFile> _cache;
+    bool                           _debug;
+    byte[]                         _diskHeader;
+    bool                           _mounted;
+    byte[]                         _root;
+    FileSystemInfo                 _statfs;
+
+#region IReadOnlyFilesystem Members
 
     /// <inheritdoc />
     public string Name => Localization.CBM_Name;
@@ -46,5 +58,41 @@ public sealed partial class CBM : IFilesystem
     /// <inheritdoc />
     public string Author => Authors.NataliaPortillo;
 
+    /// <inheritdoc />
+    public ErrorNumber ListXAttr(string path, out List<string> xattrs)
+    {
+        xattrs = null;
+
+        return ErrorNumber.NotSupported;
+    }
+
+    /// <inheritdoc />
+    public ErrorNumber GetXattr(string path, string xattr, ref byte[] buf) => ErrorNumber.NotSupported;
+
+    /// <inheritdoc />
+    public ErrorNumber ReadLink(string path, out string dest)
+    {
+        dest = null;
+
+        return ErrorNumber.NotSupported;
+    }
+
+    /// <inheritdoc />
+    public FileSystem Metadata { get; private set; }
+
+    /// <inheritdoc />
+    public IEnumerable<(string name, Type type, string description)> SupportedOptions =>
+        Array.Empty<(string name, Type type, string description)>();
+
+    /// <inheritdoc />
+    public Dictionary<string, string> Namespaces => null;
+
 #endregion
+
+    static Dictionary<string, string> GetDefaultOptions() => new()
+    {
+        {
+            "debug", false.ToString()
+        }
+    };
 }