Hondacrx
51 lines
1.7 KiB
C#
51 lines
1.7 KiB
C#
// Copyright (c) CypherCore <http://github.com/CypherCore> All rights reserved.
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// Licensed under the GNU GENERAL PUBLIC LICENSE. See LICENSE file in the project root for full license information.
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using System;
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using System.IO;
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using System.IO.Compression;
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using System.Linq;
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namespace Framework.IO
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{
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public static partial class ZLib
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{
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public static byte[] Compress(byte[] data)
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{
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ByteBuffer buffer = new();
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buffer.WriteUInt8(0x78);
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buffer.WriteUInt8(0x9c);
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uint adler32 = ZLib.adler32(1, data, (uint)data.Length);// Adler32(1, data, (uint)data.Length);
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var ms = new MemoryStream();
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using (var deflateStream = new DeflateStream(ms, CompressionMode.Compress))
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{
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deflateStream.Write(data, 0, data.Length);
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deflateStream.Flush();
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}
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buffer.WriteBytes(ms.ToArray());
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var adlerBytes = BitConverter.GetBytes(adler32);
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adlerBytes.Reverse();
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buffer.WriteBytes(adlerBytes);
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return buffer.GetData();
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}
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public static byte[] Decompress(byte[] data, uint unpackedSize)
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{
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byte[] decompressData = new byte[unpackedSize];
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using (var deflateStream = new DeflateStream(new MemoryStream(data, 2, data.Length - 6), CompressionMode.Decompress))
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{
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var decompressed = new MemoryStream();
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deflateStream.CopyTo(decompressed);
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decompressed.Seek(0, SeekOrigin.Begin);
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for (int i = 0; i < unpackedSize; i++)
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decompressData[i] = (byte)decompressed.ReadByte();
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}
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return decompressData;
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}
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}
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}
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