422 lines
13 KiB
C#
422 lines
13 KiB
C#
// <copyright file="PacketTwisterOfPartyList.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 'PartyList' type.
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/// </summary>
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internal class PacketTwisterOfPartyList : 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 v13 = data[9];
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data[9] = data[28];
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data[28] = v13;
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var v16 = (byte)((data[15] >> 7) & 1);
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if (((data[15] >> 1) & 1) != 0)
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{
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data[15] |= 0x80;
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}
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else
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{
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data[15] &= 0x7F;
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}
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if (v16 != 0)
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{
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data[15] |= 2;
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}
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else
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{
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data[15] &= 0xFD;
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}
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data[22] ^= 0x10;
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var v14 = (byte)(data[19] >> 2);
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data[19] <<= 6;
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data[19] |= v14;
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var v15 = data[9];
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data[9] = data[17];
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data[17] = v15;
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data[9] ^= 0xC2;
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}
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else
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{
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var v9 = data[6];
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data[6] = data[9];
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data[9] = v9;
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data[0] ^= 0x78;
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data[5] ^= 0x65;
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data[2] ^= 0x64;
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var v20 = (byte)((data[0] >> 1) & 1);
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if (((data[0] >> 1) & 1) != 0)
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{
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data[0] |= 2;
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}
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else
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{
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data[0] &= 0xFD;
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}
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if (v20 != 0)
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{
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data[0] |= 2;
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}
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else
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{
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data[0] &= 0xFD;
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}
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var v19 = (byte)((data[1] >> 5) & 1);
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if (((data[1] >> 1) & 1) != 0)
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{
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data[1] |= 0x20;
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}
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else
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{
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data[1] &= 0xDF;
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}
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if (v19 != 0)
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{
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data[1] |= 2;
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}
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else
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{
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data[1] &= 0xFD;
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}
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var v18 = (byte)((data[13] >> 4) & 1);
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if (((data[13] >> 1) & 1) != 0)
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{
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data[13] |= 0x10;
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}
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else
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{
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data[13] &= 0xEF;
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}
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if (v18 != 0)
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{
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data[13] |= 2;
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}
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else
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{
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data[13] &= 0xFD;
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}
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var v10 = data[8];
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data[8] = data[10];
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data[10] = v10;
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var v17 = (byte)((data[5] >> 2) & 1);
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if (((data[5] >> 7) & 1) != 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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if (v17 != 0)
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{
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data[5] |= 0x80;
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}
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else
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{
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data[5] &= 0x7F;
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}
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var v11 = data[10];
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data[10] = data[6];
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data[6] = v11;
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var v12 = (byte)(data[5] >> 4);
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data[5] *= 16;
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data[5] |= v12;
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}
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}
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else
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{
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var v4 = data[3];
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data[3] = data[3];
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data[3] = v4;
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data[4] ^= 0x32;
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var v21 = (byte)((data[2] >> 2) & 1);
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if (((data[2] >> 1) & 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 (v21 != 0)
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{
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data[2] |= 2;
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}
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else
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{
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data[2] &= 0xFD;
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}
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var v5 = (byte)(data[7] >> 2);
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data[7] <<= 6;
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data[7] |= v5;
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var v6 = (byte)(data[6] >> 6);
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data[6] *= 4;
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data[6] |= v6;
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var v7 = (byte)(data[0] >> 6);
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data[0] *= 4;
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data[0] |= v7;
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var v8 = (byte)(data[6] >> 7);
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data[6] *= 2;
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data[6] |= v8;
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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[0] >> 2) & 1);
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if (((data[0] >> 5) & 1) != 0)
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{
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data[0] |= 4;
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}
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else
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{
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data[0] &= 0xFB;
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}
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if (v2 != 0)
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{
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data[0] |= 0x20;
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}
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else
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{
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data[0] &= 0xDF;
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}
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data[0] ^= 0x65;
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var v3 = data[1];
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data[1] = data[2];
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data[2] = v3;
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data[2] ^= 0x31;
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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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data[9] ^= 0xC2;
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var v13 = data[9];
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data[9] = data[17];
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data[17] = v13;
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var v14 = (byte)(data[19] >> 6);
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data[19] *= 4;
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data[19] |= v14;
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data[22] ^= 0x10;
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var v16 = (byte)((data[15] >> 7) & 1);
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if (((data[15] >> 1) & 1) != 0)
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{
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data[15] |= 0x80;
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}
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else
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{
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data[15] &= 0x7F;
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}
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if (v16 != 0)
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{
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data[15] |= 2;
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}
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else
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{
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data[15] &= 0xFD;
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}
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var v15 = data[9];
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data[9] = data[28];
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data[28] = v15;
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}
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else
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{
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var v9 = (byte)(data[5] >> 4);
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data[5] *= 16;
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data[5] |= v9;
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var v10 = data[10];
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data[10] = data[6];
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data[6] = v10;
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var v20 = (byte)((data[5] >> 2) & 1);
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if (((data[5] >> 7) & 1) != 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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if (v20 != 0)
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{
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data[5] |= 0x80;
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}
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else
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{
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data[5] &= 0x7F;
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}
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var v11 = data[8];
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data[8] = data[10];
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data[10] = v11;
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var v19 = (byte)((data[13] >> 4) & 1);
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if (((data[13] >> 1) & 1) != 0)
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{
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data[13] |= 0x10;
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}
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else
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{
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data[13] &= 0xEF;
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}
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if (v19 != 0)
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{
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data[13] |= 2;
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}
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else
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{
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data[13] &= 0xFD;
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}
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var v18 = (byte)((data[1] >> 5) & 1);
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if (((data[1] >> 1) & 1) != 0)
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{
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data[1] |= 0x20;
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}
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else
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{
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data[1] &= 0xDF;
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}
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if (v18 != 0)
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{
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data[1] |= 2;
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}
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else
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{
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data[1] &= 0xFD;
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}
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var v17 = (byte)((data[0] >> 1) & 1);
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if (((data[0] >> 1) & 1) != 0)
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{
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data[0] |= 2;
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}
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else
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{
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data[0] &= 0xFD;
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}
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if (v17 != 0)
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{
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data[0] |= 2;
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}
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else
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{
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data[0] &= 0xFD;
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}
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data[2] ^= 0x64;
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data[5] ^= 0x65;
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data[0] ^= 0x78;
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var v12 = data[6];
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data[6] = data[9];
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data[9] = v12;
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}
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}
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else
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{
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var v4 = (byte)(data[6] >> 1);
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data[6] <<= 7;
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data[6] |= v4;
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var v5 = (byte)(data[0] >> 2);
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data[0] <<= 6;
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data[0] |= v5;
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var v6 = (byte)(data[6] >> 2);
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data[6] <<= 6;
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data[6] |= v6;
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var v7 = (byte)(data[7] >> 6);
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data[7] *= 4;
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data[7] |= v7;
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var v21 = (byte)((data[2] >> 2) & 1);
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if (((data[2] >> 1) & 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 (v21 != 0)
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{
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data[2] |= 2;
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}
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else
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{
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data[2] &= 0xFD;
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}
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data[4] ^= 0x32;
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var v8 = data[3];
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data[3] = data[3];
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data[3] = v8;
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}
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}
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else
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{
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data[2] ^= 0x31;
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var v3 = data[1];
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data[1] = data[2];
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data[2] = v3;
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data[0] ^= 0x65;
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var v2 = (byte)((data[0] >> 2) & 1);
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if (((data[0] >> 5) & 1) != 0)
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{
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data[0] |= 4;
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}
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else
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{
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data[0] &= 0xFB;
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}
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if (v2 != 0)
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{
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data[0] |= 0x20;
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}
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else
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{
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data[0] &= 0xDF;
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}
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}
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}
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}
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} |