556 lines
17 KiB
C#
556 lines
17 KiB
C#
// <copyright file="PacketTwisterOfWhisper.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 'Whisper' type.
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/// </summary>
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internal class PacketTwisterOfWhisper : 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 v18 = (byte)(data[27] >> 1);
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data[27] <<= 7;
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data[27] |= v18;
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var v19 = (byte)(data[1] >> 6);
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data[1] *= 4;
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data[1] |= v19;
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data[13] ^= 0x35;
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var v20 = data[30];
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data[30] = data[9];
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data[9] = v20;
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var v25 = (byte)((data[1] >> 4) & 1);
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if (((data[1] >> 1) & 1) != 0)
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{
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data[1] |= 0x10;
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}
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else
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{
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data[1] &= 0xEF;
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}
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if (v25 != 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 v21 = (byte)(data[13] >> 5);
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data[13] *= 8;
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data[13] |= v21;
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var v22 = data[15];
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data[15] = data[25];
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data[25] = v22;
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var v23 = data[13];
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data[13] = data[18];
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data[18] = v23;
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data[27] ^= 0x11;
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var v24 = (byte)(data[27] >> 2);
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data[27] <<= 6;
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data[27] |= v24;
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}
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else
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{
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data[3] ^= 0x32;
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var v10 = data[7];
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data[7] = data[7];
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data[7] = v10;
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var v11 = data[14];
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data[14] = data[3];
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data[3] = v11;
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var v12 = (byte)(data[9] >> 1);
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data[9] <<= 7;
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data[9] |= v12;
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var v13 = (byte)(data[0] >> 5);
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data[0] *= 8;
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data[0] |= v13;
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var v26 = (byte)((data[5] >> 2) & 1);
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if (((data[5] >> 4) & 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 (v26 != 0)
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{
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data[5] |= 0x10;
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}
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else
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{
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data[5] &= 0xEF;
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}
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var v14 = (byte)(data[10] >> 1);
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data[10] <<= 7;
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data[10] |= v14;
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data[5] ^= 0x84;
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var v15 = data[0];
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data[0] = data[9];
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data[9] = v15;
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data[6] = data[6];
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var v16 = data[10];
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data[10] = data[2];
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data[2] = v16;
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var v17 = data[2];
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data[2] = data[7];
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data[7] = v17;
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}
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}
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else
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{
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var v30 = (byte)((data[5] >> 2) & 1);
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if (((data[5] >> 2) & 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 (v30 != 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[1] ^= 0xFB;
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data[0] ^= 0xAB;
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data[4] ^= 0x78;
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var v6 = (byte)(data[2] >> 3);
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data[2] *= 32;
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data[2] |= v6;
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var v29 = (byte)((data[7] >> 7) & 1);
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if (((data[7] >> 1) & 1) != 0)
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{
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data[7] |= 0x80;
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}
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else
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{
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data[7] &= 0x7F;
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}
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if (v29 != 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 v28 = (byte)((data[2] >> 5) & 1);
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if (((data[2] >> 1) & 1) != 0)
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{
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data[2] |= 0x20;
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}
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else
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{
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data[2] &= 0xDF;
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}
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if (v28 != 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 v7 = data[6];
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data[6] = data[1];
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data[1] = v7;
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data[3] ^= 0xE7;
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var v8 = (byte)(data[5] >> 7);
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data[5] *= 2;
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data[5] |= v8;
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var v27 = (byte)((data[1] >> 1) & 1);
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if (((data[1] >> 4) & 1) != 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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if (v27 != 0)
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{
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data[1] |= 0x10;
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}
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else
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{
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data[1] &= 0xEF;
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}
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var v9 = data[0];
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data[0] = data[5];
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data[5] = v9;
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}
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}
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else
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{
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var v3 = data[3];
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data[3] = data[2];
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data[2] = v3;
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var v2 = (byte)((data[2] >> 4) & 1);
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if (((data[2] >> 1) & 1) != 0)
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{
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data[2] |= 0x10;
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}
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else
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{
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data[2] &= 0xEF;
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}
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if (v2 != 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 v32 = (byte)((data[2] >> 3) & 1);
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if (((data[2] >> 5) & 1) != 0)
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{
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data[2] |= 8;
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}
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else
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{
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data[2] &= 0xF7;
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}
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if (v32 != 0)
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{
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data[2] |= 0x20;
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}
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else
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{
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data[2] &= 0xDF;
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}
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var v4 = (byte)(data[3] >> 6);
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data[3] *= 4;
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data[3] |= v4;
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data[1] ^= 0x3E;
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var v31 = (byte)((data[0] >> 4) & 1);
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if (((data[0] >> 1) & 1) != 0)
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{
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data[0] |= 0x10;
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}
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else
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{
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data[0] &= 0xEF;
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}
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if (v31 != 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 v5 = (byte)(data[1] >> 4);
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data[1] *= 16;
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data[1] |= v5;
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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 v18 = (byte)(data[27] >> 6);
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data[27] *= 4;
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data[27] |= v18;
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data[27] ^= 0x11;
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var v19 = data[13];
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data[13] = data[18];
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data[18] = v19;
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var v20 = data[15];
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data[15] = data[25];
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data[25] = v20;
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var v21 = (byte)(data[13] >> 3);
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data[13] *= 32;
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data[13] |= v21;
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var v25 = (byte)((data[1] >> 4) & 1);
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if (((data[1] >> 1) & 1) != 0)
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{
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data[1] |= 0x10;
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}
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else
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{
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data[1] &= 0xEF;
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}
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if (v25 != 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 v22 = data[30];
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data[30] = data[9];
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data[9] = v22;
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data[13] ^= 0x35;
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var v23 = (byte)(data[1] >> 2);
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data[1] <<= 6;
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data[1] |= v23;
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var v24 = (byte)(data[27] >> 7);
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data[27] *= 2;
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data[27] |= v24;
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}
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else
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{
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var v10 = data[2];
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data[2] = data[7];
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data[7] = v10;
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var v11 = data[10];
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data[10] = data[2];
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data[2] = v11;
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data[6] = data[6];
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var v12 = data[0];
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data[0] = data[9];
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data[9] = v12;
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data[5] ^= 0x84;
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var v13 = (byte)(data[10] >> 7);
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data[10] *= 2;
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data[10] |= v13;
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var v26 = (byte)((data[5] >> 2) & 1);
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if (((data[5] >> 4) & 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 (v26 != 0)
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{
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data[5] |= 0x10;
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}
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else
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{
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data[5] &= 0xEF;
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}
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var v14 = (byte)(data[0] >> 3);
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data[0] *= 32;
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data[0] |= v14;
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var v15 = (byte)(data[9] >> 7);
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data[9] *= 2;
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data[9] |= v15;
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var v16 = data[14];
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data[14] = data[3];
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data[3] = v16;
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var v17 = data[7];
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data[7] = data[7];
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data[7] = v17;
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data[3] ^= 0x32;
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}
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}
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else
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{
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var v6 = data[0];
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data[0] = data[5];
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data[5] = v6;
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var v30 = (byte)((data[1] >> 1) & 1);
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if (((data[1] >> 4) & 1) != 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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if (v30 != 0)
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{
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data[1] |= 0x10;
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}
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else
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{
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data[1] &= 0xEF;
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}
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var v7 = (byte)(data[5] >> 1);
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data[5] <<= 7;
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data[5] |= v7;
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data[3] ^= 0xE7;
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var v8 = data[6];
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data[6] = data[1];
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data[1] = v8;
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var v29 = (byte)((data[2] >> 5) & 1);
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if (((data[2] >> 1) & 1) != 0)
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{
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data[2] |= 0x20;
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}
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else
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{
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data[2] &= 0xDF;
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}
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if (v29 != 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 v28 = (byte)((data[7] >> 7) & 1);
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if (((data[7] >> 1) & 1) != 0)
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{
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data[7] |= 0x80;
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}
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else
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{
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data[7] &= 0x7F;
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}
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if (v28 != 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 v9 = (byte)(data[2] >> 5);
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data[2] *= 8;
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data[2] |= v9;
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data[4] ^= 0x78;
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data[0] ^= 0xAB;
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data[1] ^= 0xFB;
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var v27 = (byte)((data[5] >> 2) & 1);
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if (((data[5] >> 2) & 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 (v27 != 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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}
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}
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else
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{
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var v3 = (byte)(data[1] >> 4);
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data[1] *= 16;
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data[1] |= v3;
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var v2 = (byte)((data[0] >> 4) & 1);
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if (((data[0] >> 1) & 1) != 0)
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{
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data[0] |= 0x10;
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}
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else
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{
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data[0] &= 0xEF;
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}
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if (v2 != 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[1] ^= 0x3E;
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var v4 = (byte)(data[3] >> 2);
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data[3] <<= 6;
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data[3] |= v4;
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var v32 = (byte)((data[2] >> 3) & 1);
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if (((data[2] >> 5) & 1) != 0)
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{
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data[2] |= 8;
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}
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else
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{
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data[2] &= 0xF7;
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}
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if (v32 != 0)
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{
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data[2] |= 0x20;
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}
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else
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{
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data[2] &= 0xDF;
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}
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var v31 = (byte)((data[2] >> 4) & 1);
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if (((data[2] >> 1) & 1) != 0)
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{
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data[2] |= 0x10;
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}
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else
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{
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data[2] &= 0xEF;
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}
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if (v31 != 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 = data[3];
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data[3] = data[2];
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data[2] = v5;
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}
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}
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}
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} |