AxibugEmuOnline/OtherCore/MyNes.Standard2/MyNes.Core/StateHandler.cs

195 lines
6.9 KiB
C#
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2024-07-24 15:03:33 +08:00
using System;
using System.IO;
using System.Text;
namespace MyNes.Core
{
public class StateHandler
{
public static int Slot = 0;
internal static string StateFolder = "States";
private const byte state_version = 7;
private static bool IsSavingState = false;
private static bool IsLoadingState = false;
public static void SaveState(string fileName, bool saveImage)
{
if (!NesEmu.ON)
{
Tracer.WriteError("Can't save state, emu is off.");
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error1, instant: false);
return;
}
if (!File.Exists(NesEmu.CurrentFilePath))
{
Tracer.WriteError("Can't save state, no rom file is loaded.");
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error2, instant: false);
return;
}
if (IsLoadingState)
{
Tracer.WriteError("Can't save state while loading a state !");
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error3, instant: false);
return;
}
if (IsSavingState)
{
Tracer.WriteError("Already saving state !!");
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error4, instant: false);
return;
}
IsSavingState = true;
BinaryWriter bin = new BinaryWriter(new MemoryStream());
bin.Write(Encoding.ASCII.GetBytes("MNS"));
bin.Write((byte)7);
for (int i = 0; i < NesEmu.SHA1.Length; i += 2)
{
string value = NesEmu.SHA1.Substring(i, 2).ToUpper();
bin.Write(Convert.ToByte(value, 16));
}
NesEmu.WriteStateData(ref bin);
byte[] outData = new byte[0];
ZlipWrapper.CompressData(((MemoryStream)bin.BaseStream).GetBuffer(), out outData);
FileStream fileStream = new FileStream(fileName, FileMode.Create, FileAccess.Write);
fileStream.Write(outData, 0, outData.Length);
MyNesMain.VideoProvider.TakeSnapshotAs(fileName.Replace(".mns", ".jpg"), ".jpg");
bin.Flush();
bin.Close();
fileStream.Flush();
fileStream.Close();
IsSavingState = false;
Tracer.WriteInformation("State saved at slot " + Slot);
MyNesMain.VideoProvider.WriteInfoNotification(MNInterfaceLanguage.Message_Info1 + " " + Slot, instant: false);
}
public static void SaveState(int Slot)
{
if (StateFolder == "States")
{
StateFolder = Path.Combine(MyNesMain.WorkingFolder, "States");
}
Directory.CreateDirectory(StateFolder);
SaveState(Path.Combine(StateFolder, Path.GetFileNameWithoutExtension(NesEmu.CurrentFilePath)) + "_" + Slot + ".mns", saveImage: false);
}
public static void SaveState()
{
SaveState(Slot);
}
public static void LoadState()
{
LoadState(Slot);
}
public static void LoadState(string fileName)
{
if (!NesEmu.ON)
{
Tracer.WriteError("Can't load state, emu is off.");
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error5, instant: false);
return;
}
if (!File.Exists(NesEmu.CurrentFilePath))
{
Tracer.WriteError("Can't load state, no rom file is loaded.");
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error6, instant: false);
return;
}
if (IsSavingState)
{
Tracer.WriteError("Can't load state while saving a state !");
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error7, instant: false);
return;
}
if (IsLoadingState)
{
Tracer.WriteError("Already loading state !!");
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error8, instant: false);
return;
}
if (!File.Exists(fileName))
{
Tracer.WriteError("No state found in slot " + Slot);
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error9 + " " + Slot, instant: false);
return;
}
IsLoadingState = true;
FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
byte[] array = new byte[fileStream.Length];
byte[] outData = new byte[0];
fileStream.Read(array, 0, array.Length);
fileStream.Close();
ZlipWrapper.DecompressData(array, out outData);
BinaryReader bin = new BinaryReader(new MemoryStream(outData));
byte[] array2 = new byte[3];
bin.Read(array2, 0, array2.Length);
if (Encoding.ASCII.GetString(array2) != "MNS")
{
Tracer.WriteError("Unable load state at slot " + Slot + "; Not My Nes State File !");
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error10 + " " + Slot + "; " + MNInterfaceLanguage.Message_Error11, instant: false);
IsLoadingState = false;
return;
}
if (bin.ReadByte() != 7)
{
Tracer.WriteError("Unable load state at slot " + Slot + "; Not compatible state file version !");
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error10 + " " + Slot + "; " + MNInterfaceLanguage.Message_Error12, instant: false);
IsLoadingState = false;
return;
}
string text = "";
for (int i = 0; i < NesEmu.SHA1.Length; i += 2)
{
text += bin.ReadByte().ToString("X2");
}
if (text.ToLower() != NesEmu.SHA1.ToLower())
{
Tracer.WriteError("Unable load state at slot " + Slot + "; This state file is not for this game; not same SHA1 !");
MyNesMain.VideoProvider.WriteErrorNotification(MNInterfaceLanguage.Message_Error10 + " " + Slot + "; " + MNInterfaceLanguage.Message_Error13, instant: false);
IsLoadingState = false;
}
else
{
NesEmu.ReadStateData(ref bin);
bin.Close();
IsLoadingState = false;
Tracer.WriteInformation("State loaded from slot " + Slot);
MyNesMain.VideoProvider.WriteInfoNotification(MNInterfaceLanguage.Message_Info2 + " " + Slot, instant: false);
}
}
public static void LoadState(int Slot)
{
if (StateFolder == "States")
{
StateFolder = Path.Combine(MyNesMain.WorkingFolder, "States");
}
Directory.CreateDirectory(StateFolder);
LoadState(Path.Combine(StateFolder, Path.GetFileNameWithoutExtension(NesEmu.CurrentFilePath)) + "_" + Slot + ".mns");
}
public static string GetStateFile(int slot)
{
if (File.Exists(NesEmu.CurrentFilePath))
{
return Path.Combine(StateFolder, Path.GetFileNameWithoutExtension(NesEmu.CurrentFilePath)) + "_" + slot + ".mns";
}
return "";
}
public static string GetStateImageFile(int slot)
{
if (File.Exists(NesEmu.CurrentFilePath))
{
return Path.Combine(StateFolder, Path.GetFileNameWithoutExtension(NesEmu.CurrentFilePath)) + "_" + slot + ".jpg";
}
return "";
}
}
}