hondacrx
63 lines
2.2 KiB
C#
63 lines
2.2 KiB
C#
/*
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* Copyright (C) 2012-2020 CypherCore <http://github.com/CypherCore>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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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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buffer.WriteBytes(BitConverter.GetBytes(adler32).Reverse().ToArray());
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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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