[Aaru.Helpers] Move all stream extensions from around the application to this project.

IO/NonClosableStream.cs

@@ -0,0 +1,78 @@
+// /***************************************************************************
+// Aaru Data Preservation Suite
+// ----------------------------------------------------------------------------
+//
+// Filename       : NonClosableStream.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Compression.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Overrides MemoryStream to ignore standard close requests.
+//
+// --[ 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.Diagnostics.CodeAnalysis;
+using System.IO;
+
+namespace Aaru.Helpers.IO;
+
+/// <inheritdoc />
+/// <summary>Creates a MemoryStream that ignores close commands</summary>
+[SuppressMessage("ReSharper", "UnusedMember.Global")]
+public sealed class NonClosableStream : Stream
+{
+    readonly Stream _baseStream;
+
+    public NonClosableStream(byte[] buffer) => _baseStream = new MemoryStream(buffer);
+
+    public NonClosableStream() => _baseStream = new MemoryStream();
+
+    public NonClosableStream(Stream stream) => _baseStream = stream;
+
+    public override bool CanRead  => _baseStream.CanRead;
+    public override bool CanSeek  => _baseStream.CanSeek;
+    public override bool CanWrite => _baseStream.CanWrite;
+    public override long Length   => _baseStream.Length;
+
+    public override long Position
+    {
+        get => _baseStream.Position;
+        set => _baseStream.Position = value;
+    }
+
+    public override void Flush() => _baseStream.Flush();
+
+    public override int Read(byte[] buffer, int offset, int count) => _baseStream.EnsureRead(buffer, offset, count);
+
+    public override long Seek(long offset, SeekOrigin origin) => _baseStream.Seek(offset, origin);
+
+    public override void SetLength(long value) => _baseStream.SetLength(value);
+
+    public override void Write(byte[] buffer, int offset, int count) => _baseStream.Write(buffer, offset, count);
+
+    public override void Close()
+    {
+        // Do nothing
+    }
+
+    public void ReallyClose() => _baseStream.Close();
+}