[Symbian Installation File] Implement GetEntry().

Aaru.Archives/Aaru.Archives.csproj

@@ -58,6 +58,7 @@
   <ItemGroup>
     <ProjectReference Include="..\Aaru.CommonTypes\Aaru.CommonTypes.csproj"/>
     <ProjectReference Include="..\Aaru.Console\Aaru.Console.csproj"/>
+    <ProjectReference Include="..\Aaru.Filters\Aaru.Filters.csproj"/>
     <ProjectReference Include="..\Aaru.Helpers\Aaru.Helpers.csproj"/>
   </ItemGroup>
   <ItemGroup>

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 ErrorNumber Stat(int entryNumber, out FileEntryInfo stat)
         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
 }