Add support for PKWARE Data Compression Library (Blast) in Zip compression

This commit is contained in:
2026-04-21 22:47:54 +01:00
parent beef57cdad
commit 1aafe2f23f
2 changed files with 59 additions and 0 deletions

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@@ -109,6 +109,7 @@
<Compile Include="Zip\Deflate64Stream.cs"/>
<Compile Include="Zip\ImplodeStream.cs"/>
<Compile Include="Zip\JpegStream.cs"/>
<Compile Include="Zip\Blast.cs"/>
<Compile Include="Zip\PpmdStream.cs"/>
<Compile Include="Zip\ReduceStream.cs"/>
<Compile Include="Zip\ShrinkStream.cs"/>

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@@ -0,0 +1,58 @@
// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename : Blast.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Compression algorithms.
//
// --[ 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 © 2011-2026 Natalia Portillo
// ****************************************************************************/
using System.Runtime.InteropServices;
namespace Aaru.Compression.Zip;
// ReSharper disable once InconsistentNaming
/// <summary>Implements PKWARE's Data Compression Library Implode compression algorithm</summary>
public partial class Blast
{
/// <summary>Set to <c>true</c> if this algorithm is supported, <c>false</c> otherwise.</summary>
public static bool IsSupported => Native.IsSupported;
[LibraryImport("libAaru.Compression.Native", SetLastError = true)]
private static partial int AARU_zip_blast_decode_buffer(byte[] dst_buffer, ref nint dst_size, byte[] src_buffer,
nint src_size);
/// <summary>Decodes a buffer compressed with PKWARE's Data Compression Library Implode</summary>
/// <param name="source">Encoded buffer</param>
/// <param name="destination">Buffer where to write the decoded data</param>
/// <returns>The number of decoded bytes</returns>
public static int DecodeBuffer(byte[] source, byte[] destination)
{
if(!Native.IsSupported) return 0;
nint destLen = destination.Length;
AARU_zip_blast_decode_buffer(destination, ref destLen, source, source.Length);
return (int)destLen;
}
}