440 lines
13 KiB
C#
440 lines
13 KiB
C#
// <copyright file="PacketTwister47.cs" company="MUnique">
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// Licensed under the MIT License. See LICENSE file in the project root for full license information.
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// </copyright>
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namespace MUnique.OpenMU.Network.PacketTwister;
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/// <summary>
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/// PacketTwister implementation for packets of an unknown type.
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/// </summary>
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internal class PacketTwister47 : IPacketTwister
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{
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/// <inheritdoc/>
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public void Twist(Span<byte> data)
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{
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if (data.Length >= 4)
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{
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if (data.Length >= 8)
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{
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if (data.Length >= 16)
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{
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if (data.Length >= 32)
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{
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var v17 = (byte)((data[14] >> 2) & 1);
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if (((data[14] >> 1) & 1) != 0)
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{
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data[14] |= 4;
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}
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else
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{
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data[14] &= 0xFB;
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}
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if (v17 != 0)
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{
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data[14] |= 2;
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}
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else
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{
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data[14] &= 0xFD;
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}
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var v11 = data[9];
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data[9] = data[20];
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data[20] = v11;
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var v12 = data[24];
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data[24] = data[29];
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data[29] = v12;
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var v13 = (byte)(data[17] >> 6);
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data[17] *= 4;
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data[17] |= v13;
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var v14 = (byte)(data[2] >> 2);
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data[2] <<= 6;
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data[2] |= v14;
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data[17] ^= 0x2A;
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var v16 = (byte)((data[16] >> 2) & 1);
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if (((data[16] >> 3) & 1) != 0)
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{
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data[16] |= 4;
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}
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else
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{
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data[16] &= 0xFB;
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}
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if (v16 != 0)
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{
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data[16] |= 8;
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}
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else
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{
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data[16] &= 0xF7;
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}
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var v15 = (byte)((data[6] >> 4) & 1);
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if (((data[6] >> 3) & 1) != 0)
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{
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data[6] |= 0x10;
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}
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else
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{
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data[6] &= 0xEF;
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}
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if (v15 != 0)
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{
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data[6] |= 8;
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}
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else
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{
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data[6] &= 0xF7;
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}
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}
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else
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{
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var v8 = data[10];
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data[10] = data[1];
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data[1] = v8;
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var v9 = (byte)(data[10] >> 1);
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data[10] <<= 7;
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data[10] |= v9;
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var v10 = data[6];
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data[6] = data[5];
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data[5] = v10;
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}
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}
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else
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{
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var v19 = (byte)((data[7] >> 1) & 1);
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if (((data[7] >> 1) & 1) != 0)
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{
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data[7] |= 2;
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}
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else
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{
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data[7] &= 0xFD;
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}
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if (v19 != 0)
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{
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data[7] |= 2;
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}
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else
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{
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data[7] &= 0xFD;
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}
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var v18 = (byte)((data[5] >> 3) & 1);
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if (((data[5] >> 2) & 1) != 0)
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{
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data[5] |= 8;
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}
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else
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{
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data[5] &= 0xF7;
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}
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if (v18 != 0)
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{
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data[5] |= 4;
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}
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else
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{
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data[5] &= 0xFB;
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}
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data[7] ^= 0xFA;
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}
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}
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else
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{
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var v2 = (byte)((data[3] >> 5) & 1);
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if (((data[3] >> 6) & 1) != 0)
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{
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data[3] |= 0x20;
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}
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else
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{
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data[3] &= 0xDF;
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}
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if (v2 != 0)
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{
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data[3] |= 0x40;
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}
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else
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{
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data[3] &= 0xBF;
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}
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var v3 = (byte)(data[1] >> 5);
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data[1] *= 8;
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data[1] |= v3;
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var v4 = data[0];
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data[0] = data[1];
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data[1] = v4;
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var v21 = (byte)((data[1] >> 2) & 1);
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if (((data[1] >> 2) & 1) != 0)
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{
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data[1] |= 4;
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}
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else
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{
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data[1] &= 0xFB;
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}
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if (v21 != 0)
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{
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data[1] |= 4;
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}
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else
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{
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data[1] &= 0xFB;
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}
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var v5 = data[0];
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data[0] = data[0];
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data[0] = v5;
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var v6 = (byte)(data[3] >> 5);
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data[3] *= 8;
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data[3] |= v6;
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var v7 = data[3];
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data[3] = data[0];
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data[0] = v7;
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data[2] ^= 0x20;
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var v20 = (byte)((data[2] >> 2) & 1);
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if (((data[2] >> 7) & 1) != 0)
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{
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data[2] |= 4;
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}
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else
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{
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data[2] &= 0xFB;
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}
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if (v20 != 0)
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{
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data[2] |= 0x80;
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}
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else
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{
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data[2] &= 0x7F;
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}
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}
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}
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}
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/// <inheritdoc/>
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public void Correct(Span<byte> data)
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{
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if (data.Length >= 4)
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{
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if (data.Length >= 8)
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{
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if (data.Length >= 16)
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{
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if (data.Length >= 32)
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{
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var v17 = (byte)((data[6] >> 4) & 1);
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if (((data[6] >> 3) & 1) != 0)
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{
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data[6] |= 0x10;
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}
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else
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{
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data[6] &= 0xEF;
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}
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if (v17 != 0)
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{
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data[6] |= 8;
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}
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else
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{
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data[6] &= 0xF7;
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}
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var v16 = (byte)((data[16] >> 2) & 1);
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if (((data[16] >> 3) & 1) != 0)
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{
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data[16] |= 4;
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}
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else
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{
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data[16] &= 0xFB;
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}
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if (v16 != 0)
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{
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data[16] |= 8;
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}
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else
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{
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data[16] &= 0xF7;
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}
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data[17] ^= 0x2A;
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var v11 = (byte)(data[2] >> 6);
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data[2] *= 4;
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data[2] |= v11;
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var v12 = (byte)(data[17] >> 2);
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data[17] <<= 6;
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data[17] |= v12;
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var v13 = data[24];
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data[24] = data[29];
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data[29] = v13;
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var v14 = data[9];
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data[9] = data[20];
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data[20] = v14;
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var v15 = (byte)((data[14] >> 2) & 1);
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if (((data[14] >> 1) & 1) != 0)
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{
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data[14] |= 4;
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}
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else
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{
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data[14] &= 0xFB;
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}
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if (v15 != 0)
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{
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data[14] |= 2;
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}
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else
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{
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data[14] &= 0xFD;
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}
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}
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else
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{
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var v8 = data[6];
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data[6] = data[5];
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data[5] = v8;
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var v9 = (byte)(data[10] >> 7);
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data[10] *= 2;
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data[10] |= v9;
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var v10 = data[10];
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data[10] = data[1];
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data[1] = v10;
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}
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}
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else
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{
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data[7] ^= 0xFA;
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var v19 = (byte)((data[5] >> 3) & 1);
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if (((data[5] >> 2) & 1) != 0)
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{
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data[5] |= 8;
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}
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else
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{
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data[5] &= 0xF7;
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}
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if (v19 != 0)
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{
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data[5] |= 4;
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}
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else
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{
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data[5] &= 0xFB;
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}
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var v18 = (byte)((data[7] >> 1) & 1);
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if (((data[7] >> 1) & 1) != 0)
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{
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data[7] |= 2;
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}
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else
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{
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data[7] &= 0xFD;
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}
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if (v18 != 0)
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{
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data[7] |= 2;
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}
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else
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{
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data[7] &= 0xFD;
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}
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}
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}
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else
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{
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var v2 = (byte)((data[2] >> 2) & 1);
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if (((data[2] >> 7) & 1) != 0)
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{
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data[2] |= 4;
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}
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else
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{
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data[2] &= 0xFB;
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}
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if (v2 != 0)
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{
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data[2] |= 0x80;
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}
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else
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{
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data[2] &= 0x7F;
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}
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data[2] ^= 0x20;
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var v3 = data[3];
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data[3] = data[0];
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data[0] = v3;
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var v4 = (byte)(data[3] >> 3);
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data[3] *= 32;
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data[3] |= v4;
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var v5 = data[0];
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data[0] = data[0];
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data[0] = v5;
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var v21 = (byte)((data[1] >> 2) & 1);
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if (((data[1] >> 2) & 1) != 0)
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{
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data[1] |= 4;
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}
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else
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{
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data[1] &= 0xFB;
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}
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if (v21 != 0)
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{
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data[1] |= 4;
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}
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else
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{
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data[1] &= 0xFB;
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}
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var v6 = data[0];
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data[0] = data[1];
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data[1] = v6;
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var v7 = (byte)(data[1] >> 3);
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data[1] *= 32;
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data[1] |= v7;
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var v20 = (byte)((data[3] >> 5) & 1);
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if (((data[3] >> 6) & 1) != 0)
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{
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data[3] |= 0x20;
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}
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else
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{
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data[3] &= 0xDF;
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}
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if (v20 != 0)
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{
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data[3] |= 0x40;
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}
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else
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{
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data[3] &= 0xBF;
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}
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}
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}
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}
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} |