195 lines
6.9 KiB
C#
195 lines
6.9 KiB
C#
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using System;
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using System.IO;
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using System.Text;
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namespace MyNes.Core
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{
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public class StateHandler
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{
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public static int Slot = 0;
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internal static string StateFolder = "States";
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private const byte state_version = 7;
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private static bool IsSavingState = false;
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private static bool IsLoadingState = false;
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public static void SaveState(string fileName, bool saveImage)
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{
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if (!NesEmu.ON)
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{
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Tracer.WriteError("Can't save state, emu is off.");
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error1, instant: false);
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return;
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}
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if (!File.Exists(NesEmu.CurrentFilePath))
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{
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Tracer.WriteError("Can't save state, no rom file is loaded.");
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error2, instant: false);
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return;
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}
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if (IsLoadingState)
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{
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Tracer.WriteError("Can't save state while loading a state !");
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error3, instant: false);
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return;
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}
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if (IsSavingState)
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{
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Tracer.WriteError("Already saving state !!");
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error4, instant: false);
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return;
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}
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IsSavingState = true;
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BinaryWriter bin = new BinaryWriter(new MemoryStream());
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bin.Write(Encoding.ASCII.GetBytes("MNS"));
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bin.Write((byte)7);
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for (int i = 0; i < NesEmu.SHA1.Length; i += 2)
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{
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string value = NesEmu.SHA1.Substring(i, 2).ToUpper();
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bin.Write(Convert.ToByte(value, 16));
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}
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NesEmu.WriteStateData(ref bin);
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byte[] outData = new byte[0];
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ZlipWrapper.CompressData(((MemoryStream)bin.BaseStream).GetBuffer(), out outData);
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FileStream fileStream = new FileStream(fileName, FileMode.Create, FileAccess.Write);
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fileStream.Write(outData, 0, outData.Length);
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MyNesMain.VideoProvider.TakeSnapshotAs(fileName.Replace(".mns", ".jpg"), ".jpg");
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bin.Flush();
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bin.Close();
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fileStream.Flush();
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fileStream.Close();
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IsSavingState = false;
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Tracer.WriteInformation("State saved at slot " + Slot);
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MyNesMain.VideoProvider.WriteInfoNotification(MNInterfaceLanguage.Message_Info1 + " " + Slot, instant: false);
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}
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public static void SaveState(int Slot)
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{
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if (StateFolder == "States")
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{
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StateFolder = Path.Combine(MyNesMain.WorkingFolder, "States");
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}
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Directory.CreateDirectory(StateFolder);
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SaveState(Path.Combine(StateFolder, Path.GetFileNameWithoutExtension(NesEmu.CurrentFilePath)) + "_" + Slot + ".mns", saveImage: false);
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}
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public static void SaveState()
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{
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SaveState(Slot);
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}
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public static void LoadState()
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{
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LoadState(Slot);
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}
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public static void LoadState(string fileName)
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{
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if (!NesEmu.ON)
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{
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Tracer.WriteError("Can't load state, emu is off.");
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error5, instant: false);
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return;
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}
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if (!File.Exists(NesEmu.CurrentFilePath))
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{
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Tracer.WriteError("Can't load state, no rom file is loaded.");
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error6, instant: false);
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return;
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}
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if (IsSavingState)
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{
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Tracer.WriteError("Can't load state while saving a state !");
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error7, instant: false);
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return;
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}
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if (IsLoadingState)
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{
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Tracer.WriteError("Already loading state !!");
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error8, instant: false);
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return;
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}
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if (!File.Exists(fileName))
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{
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Tracer.WriteError("No state found in slot " + Slot);
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error9 + " " + Slot, instant: false);
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return;
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}
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IsLoadingState = true;
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FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
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byte[] array = new byte[fileStream.Length];
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byte[] outData = new byte[0];
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fileStream.Read(array, 0, array.Length);
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fileStream.Close();
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ZlipWrapper.DecompressData(array, out outData);
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BinaryReader bin = new BinaryReader(new MemoryStream(outData));
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byte[] array2 = new byte[3];
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bin.Read(array2, 0, array2.Length);
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if (Encoding.ASCII.GetString(array2) != "MNS")
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{
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Tracer.WriteError("Unable load state at slot " + Slot + "; Not My Nes State File !");
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error10 + " " + Slot + "; " + MNInterfaceLanguage.Message_Error11, instant: false);
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IsLoadingState = false;
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return;
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}
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if (bin.ReadByte() != 7)
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{
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Tracer.WriteError("Unable load state at slot " + Slot + "; Not compatible state file version !");
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error10 + " " + Slot + "; " + MNInterfaceLanguage.Message_Error12, instant: false);
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IsLoadingState = false;
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return;
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}
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string text = "";
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for (int i = 0; i < NesEmu.SHA1.Length; i += 2)
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{
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text += bin.ReadByte().ToString("X2");
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}
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if (text.ToLower() != NesEmu.SHA1.ToLower())
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{
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Tracer.WriteError("Unable load state at slot " + Slot + "; This state file is not for this game; not same SHA1 !");
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MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error10 + " " + Slot + "; " + MNInterfaceLanguage.Message_Error13, instant: false);
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IsLoadingState = false;
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}
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else
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{
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NesEmu.ReadStateData(ref bin);
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bin.Close();
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IsLoadingState = false;
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Tracer.WriteInformation("State loaded from slot " + Slot);
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MyNesMain.VideoProvider.WriteInfoNotification(MNInterfaceLanguage.Message_Info2 + " " + Slot, instant: false);
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}
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}
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public static void LoadState(int Slot)
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{
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if (StateFolder == "States")
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{
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StateFolder = Path.Combine(MyNesMain.WorkingFolder, "States");
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}
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Directory.CreateDirectory(StateFolder);
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LoadState(Path.Combine(StateFolder, Path.GetFileNameWithoutExtension(NesEmu.CurrentFilePath)) + "_" + Slot + ".mns");
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}
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public static string GetStateFile(int slot)
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{
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if (File.Exists(NesEmu.CurrentFilePath))
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{
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return Path.Combine(StateFolder, Path.GetFileNameWithoutExtension(NesEmu.CurrentFilePath)) + "_" + slot + ".mns";
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}
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return "";
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}
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public static string GetStateImageFile(int slot)
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{
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if (File.Exists(NesEmu.CurrentFilePath))
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{
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return Path.Combine(StateFolder, Path.GetFileNameWithoutExtension(NesEmu.CurrentFilePath)) + "_" + slot + ".jpg";
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}
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return "";
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}
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}
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}
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