86 lines
2.2 KiB
C#
86 lines
2.2 KiB
C#
using System;
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using System.IO;
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using BizHawk.Common.BufferExtensions;
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using BizHawk.Emulation.Common;
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namespace BizHawk.Emulation.Cores.Consoles.Nintendo.QuickNES
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{
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public partial class QuickNES : IStatable
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{
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public bool BinarySaveStatesPreferred => true;
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public void SaveStateText(TextWriter writer)
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{
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CheckDisposed();
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var temp = SaveStateBinary();
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temp.SaveAsHexFast(writer);
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}
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public void LoadStateText(TextReader reader)
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{
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CheckDisposed();
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string hex = reader.ReadLine();
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byte[] state = new byte[hex.Length / 2];
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state.ReadFromHexFast(hex);
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LoadStateBinary(new BinaryReader(new MemoryStream(state)));
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}
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public void SaveStateBinary(BinaryWriter writer)
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{
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CheckDisposed();
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LibQuickNES.ThrowStringError(QN.qn_state_save(Context, _saveStateBuff, _saveStateBuff.Length));
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writer.Write(_saveStateBuff.Length);
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writer.Write(_saveStateBuff);
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// other variables
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writer.Write(IsLagFrame);
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writer.Write(LagCount);
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writer.Write(Frame);
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}
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public void LoadStateBinary(BinaryReader reader)
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{
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CheckDisposed();
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int len = reader.ReadInt32();
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if (len != _saveStateBuff.Length)
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{
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throw new InvalidOperationException("Unexpected savestate buffer length!");
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}
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reader.Read(_saveStateBuff, 0, _saveStateBuff.Length);
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LibQuickNES.ThrowStringError(QN.qn_state_load(Context, _saveStateBuff, _saveStateBuff.Length));
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// other variables
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IsLagFrame = reader.ReadBoolean();
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LagCount = reader.ReadInt32();
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Frame = reader.ReadInt32();
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}
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public byte[] SaveStateBinary()
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{
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CheckDisposed();
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var ms = new MemoryStream(_saveStateBuff2, true);
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var bw = new BinaryWriter(ms);
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SaveStateBinary(bw);
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bw.Flush();
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if (ms.Position != _saveStateBuff2.Length)
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{
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throw new InvalidOperationException("Unexpected savestate length!");
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}
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bw.Close();
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return _saveStateBuff2;
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}
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private byte[] _saveStateBuff;
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private byte[] _saveStateBuff2;
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private void InitSaveStateBuff()
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{
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int size = 0;
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LibQuickNES.ThrowStringError(QN.qn_state_size(Context, ref size));
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_saveStateBuff = new byte[size];
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_saveStateBuff2 = new byte[size + 13];
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}
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}
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}
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