[Symbian Installation File] Implement GetEntry().

Aaru.Archives/Symbian/Files.cs

@@ -32,7 +32,9 @@
 
 using System;
 using Aaru.CommonTypes.Enums;
+using Aaru.CommonTypes.Interfaces;
 using Aaru.CommonTypes.Structs;
+using Aaru.Filters;
 using FileAttributes = System.IO.FileAttributes;
 
 namespace Aaru.Archives;
@@ -146,5 +148,31 @@ public sealed partial class Symbian
         return ErrorNumber.NoError;
     }
 
+    /// <inheritdoc />
+    public ErrorNumber GetEntry(int entryNumber, out IFilter filter)
+    {
+        filter = null;
+        if(!Opened)
+            return ErrorNumber.NotOpened;
+
+        if(entryNumber < 0 || entryNumber >= _files.Count)
+            return ErrorNumber.OutOfRange;
+
+        // TODO: Implement
+        if(_compressed)
+            return ErrorNumber.NotSupported;
+
+        var offsetStream = new OffsetStream(_stream, _files[entryNumber].pointer,
+                                            _files[entryNumber].pointer + _files[entryNumber].length);
+        filter = new ZZZNoFilter();
+        ErrorNumber errno = filter.Open(offsetStream);
+
+        if(errno == ErrorNumber.NoError)
+            return ErrorNumber.NoError;
+
+        offsetStream.Close();
+        return errno;
+    }
+
 #endregion
 }

Aaru.Archives/Symbian/Unsupported.cs

@@ -1,50 +0,0 @@
-// /***************************************************************************
-// Aaru Data Preservation Suite
-// ----------------------------------------------------------------------------
-//
-// Filename       : Symbian.cs
-// Author(s)      : Natalia Portillo <claunia@claunia.com>
-//
-// Component      : Symbian plugin.
-//
-// --[ Description ] ----------------------------------------------------------
-//
-//     Identifies Symbian installer (.sis) packages 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 © 2011-2023 Natalia Portillo
-// ****************************************************************************/
-
-using System;
-using System.Diagnostics.CodeAnalysis;
-using Aaru.CommonTypes.Enums;
-using Aaru.CommonTypes.Interfaces;
-
-namespace Aaru.Archives;
-
-[SuppressMessage("ReSharper", "UnusedType.Global")]
-[SuppressMessage("ReSharper", "UnusedMember.Local")]
-public sealed partial class Symbian
-{
-#region IArchive Members
-
-    /// <inheritdoc />
-    public ErrorNumber GetEntry(int entryNumber, out IFilter filter) => throw new NotImplementedException();
-
-#endregion
-}