[Symbian Installation File] Implement GetXattr().

Aaru.Archives/Symbian/Unsupported.cs

@@ -33,7 +33,6 @@
 using System;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
-using Aaru.CommonTypes.Enums;
 using Aaru.CommonTypes.Interfaces;
 
 namespace Aaru.Archives;
@@ -44,10 +43,6 @@ public sealed partial class Symbian
 {
 #region IArchive Members
 
-    /// <inheritdoc />
-    public ErrorNumber GetXattr(int entryNumber, string xattr, out byte[] buffer) =>
-        throw new NotImplementedException();
-
     /// <inheritdoc />
     public FileSystemInfo Stat(int entryNumber) => throw new NotImplementedException();
 

Aaru.Archives/Symbian/Xattrs.cs

@@ -31,6 +31,8 @@
 // ****************************************************************************/
 
 using System.Collections.Generic;
+using System.Text;
+using Aaru.CommonTypes.Enums;
 
 namespace Aaru.Archives;
 
@@ -56,5 +58,24 @@ public sealed partial class Symbian
         };
     }
 
+    /// <inheritdoc />
+    public ErrorNumber GetXattr(int entryNumber, string xattr, out byte[] buffer)
+    {
+        buffer = null;
+
+        if(!_opened)
+            return ErrorNumber.NotOpened;
+
+        if(entryNumber < 0 || entryNumber >= _files.Count)
+            return ErrorNumber.OutOfRange;
+
+        if(xattr != "org.iana.mime_type" || _files[entryNumber].mime is null)
+            return ErrorNumber.NoSuchExtendedAttribute;
+
+        buffer = Encoding.ASCII.GetBytes(_files[entryNumber].mime);
+
+        return ErrorNumber.NoError;
+    }
+
 #endregion
 }