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61 lines
3.0 KiB
C#
61 lines
3.0 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : ZSTD.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Compression algorithms.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2022 Natalia Portillo
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// ****************************************************************************/
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namespace Aaru.Compression;
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using System.Runtime.InteropServices;
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public class ZSTD
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{
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/// <summary>Set to <c>true</c> if this algorithm is supported, <c>false</c> otherwise.</summary>
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public static bool IsSupported => Native.IsSupported;
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[DllImport("libAaru.Compression.Native", SetLastError = true)]
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static extern nuint AARU_zstd_decode_buffer(byte[] dst_buffer, nuint dst_size, byte[] src_buffer, nuint src_size);
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[DllImport("libAaru.Compression.Native", SetLastError = true)]
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static extern nuint AARU_zstd_encode_buffer(byte[] dst_buffer, nuint dst_size, byte[] src_buffer, nuint src_size,
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int compressionLevel);
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/// <summary>Decodes a buffer compressed with ZSTD</summary>
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/// <param name="source">Encoded buffer</param>
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/// <param name="destination">Buffer where to write the decoded data</param>
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/// <returns>The number of decoded bytes</returns>
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public static int DecodeBuffer(byte[] source, byte[] destination) =>
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(int)(Native.IsSupported
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? AARU_zstd_decode_buffer(destination, (nuint)destination.Length, source, (nuint)source.Length) : 0);
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/// <summary>Compresses a buffer using ZSTD</summary>
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/// <param name="source">Data to compress</param>
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/// <param name="destination">Buffer to store the compressed data</param>
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/// <returns></returns>
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public static int EncodeBuffer(byte[] source, byte[] destination, int compressionLevel) =>
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(int)(Native.IsSupported
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? AARU_zstd_encode_buffer(destination, (nuint)destination.Length, source, (nuint)source.Length,
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compressionLevel) : 0);
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} |