1 files changed, 244 insertions, 0 deletions
diff --git a/src/Ryujinx.HLE/Loaders/Processes/ProcessLoader.cs b/src/Ryujinx.HLE/Loaders/Processes/ProcessLoader.cs
new file mode 100644
index 00000000..785db0e5
--- /dev/null
+++ b/src/Ryujinx.HLE/Loaders/Processes/ProcessLoader.cs
@@ -0,0 +1,244 @@
+using LibHac.Common;
+using LibHac.Fs;
+using LibHac.Fs.Fsa;
+using LibHac.FsSystem;
+using LibHac.Ns;
+using LibHac.Tools.Fs;
+using LibHac.Tools.FsSystem;
+using LibHac.Tools.FsSystem.NcaUtils;
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.Loaders.Executables;
+using Ryujinx.HLE.Loaders.Processes.Extensions;
+using System.Collections.Concurrent;
+using System.IO;
+using System.Linq;
+using Path = System.IO.Path;
+
+namespace Ryujinx.HLE.Loaders.Processes
+{
+    public class ProcessLoader
+    {
+        private readonly Switch _device;
+
+        private readonly ConcurrentDictionary<ulong, ProcessResult> _processesByPid;
+
+        private ulong _latestPid;
+
+        public ProcessResult ActiveApplication => _processesByPid[_latestPid];
+
+        public ProcessLoader(Switch device)
+        {
+            _device         = device;
+            _processesByPid = new ConcurrentDictionary<ulong, ProcessResult>();
+        }
+
+        public bool LoadXci(string path)
+        {
+            FileStream stream = new(path, FileMode.Open, FileAccess.Read);
+            Xci        xci    = new(_device.Configuration.VirtualFileSystem.KeySet, stream.AsStorage());
+
+            if (!xci.HasPartition(XciPartitionType.Secure))
+            {
+                Logger.Error?.Print(LogClass.Loader, "Unable to load XCI: Could not find XCI Secure partition");
+
+                return false;
+            }
+
+            (bool success, ProcessResult processResult) = xci.OpenPartition(XciPartitionType.Secure).TryLoad(_device, path, out string errorMessage);
+
+            if (!success)
+            {
+                Logger.Error?.Print(LogClass.Loader, errorMessage, nameof(PartitionFileSystemExtensions.TryLoad));
+
+                return false;
+            }
+
+            if (processResult.ProcessId != 0 && _processesByPid.TryAdd(processResult.ProcessId, processResult))
+            {
+                if (processResult.Start(_device))
+                {
+                    _latestPid = processResult.ProcessId;
+
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        public bool LoadNsp(string path)
+        {
+            FileStream          file                = new(path, FileMode.Open, FileAccess.Read);
+            PartitionFileSystem partitionFileSystem = new(file.AsStorage());
+
+            (bool success, ProcessResult processResult) = partitionFileSystem.TryLoad(_device, path, out string errorMessage);
+
+            if (processResult.ProcessId == 0)
+            {
+                // This is not a normal NSP, it's actually a ExeFS as a NSP
+                processResult = partitionFileSystem.Load(_device, new BlitStruct<ApplicationControlProperty>(1), partitionFileSystem.GetNpdm(), true);
+            }
+
+            if (processResult.ProcessId != 0 && _processesByPid.TryAdd(processResult.ProcessId, processResult))
+            {
+                if (processResult.Start(_device))
+                {
+                    _latestPid = processResult.ProcessId;
+
+                    return true;
+                }
+            }
+
+            if (!success)
+            {
+                Logger.Error?.Print(LogClass.Loader, errorMessage, nameof(PartitionFileSystemExtensions.TryLoad));
+            }
+
+            return false;
+        }
+
+        public bool LoadNca(string path)
+        {
+            FileStream file = new(path, FileMode.Open, FileAccess.Read);
+            Nca        nca  = new(_device.Configuration.VirtualFileSystem.KeySet, file.AsStorage(false));
+
+            ProcessResult processResult = nca.Load(_device, null, null);
+
+            if (processResult.ProcessId != 0 && _processesByPid.TryAdd(processResult.ProcessId, processResult))
+            {
+                if (processResult.Start(_device))
+                {
+                    // NOTE: Check if process is SystemApplicationId or ApplicationId
+                    if (processResult.ProgramId > 0x01000000000007FF)
+                    {
+                        _latestPid = processResult.ProcessId;
+                    }
+
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        public bool LoadUnpackedNca(string exeFsDirPath, string romFsPath = null)
+        {
+            ProcessResult processResult = new LocalFileSystem(exeFsDirPath).Load(_device, romFsPath);
+
+            if (processResult.ProcessId != 0 && _processesByPid.TryAdd(processResult.ProcessId, processResult))
+            {
+                if (processResult.Start(_device))
+                {
+                    _latestPid = processResult.ProcessId;
+
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        public bool LoadNxo(string path)
+        {
+            var         nacpData    = new BlitStruct<ApplicationControlProperty>(1);
+            IFileSystem dummyExeFs  = null;
+            Stream      romfsStream = null;
+
+            string programName = "";
+            ulong  programId   = 0000000000000000;
+
+            // Load executable.
+            IExecutable executable;
+
+            if (Path.GetExtension(path).ToLower() == ".nro")
+            {
+                FileStream    input = new(path, FileMode.Open);
+                NroExecutable nro   = new(input.AsStorage());
+
+                executable = nro;
+
+                // Open RomFS if exists.
+                IStorage romFsStorage = nro.OpenNroAssetSection(LibHac.Tools.Ro.NroAssetType.RomFs, false);
+                romFsStorage.GetSize(out long romFsSize).ThrowIfFailure();
+                if (romFsSize != 0)
+                {
+                    romfsStream = romFsStorage.AsStream();
+                }
+
+                // Load Nacp if exists.
+                IStorage nacpStorage = nro.OpenNroAssetSection(LibHac.Tools.Ro.NroAssetType.Nacp, false);
+                nacpStorage.GetSize(out long nacpSize).ThrowIfFailure();
+                if (nacpSize != 0)
+                {
+                    nacpStorage.Read(0, nacpData.ByteSpan);
+
+                    programName = nacpData.Value.Title[(int)_device.System.State.DesiredTitleLanguage].NameString.ToString();
+
+                    if (string.IsNullOrWhiteSpace(programName))
+                    {
+                        programName = nacpData.Value.Title.ItemsRo.ToArray().FirstOrDefault(x => x.Name[0] != 0).NameString.ToString();
+                    }
+
+                    if (nacpData.Value.PresenceGroupId != 0)
+                    {
+                        programId = nacpData.Value.PresenceGroupId;
+                    }
+                    else if (nacpData.Value.SaveDataOwnerId != 0)
+                    {
+                        programId = nacpData.Value.SaveDataOwnerId;
+                    }
+                    else if (nacpData.Value.AddOnContentBaseId != 0)
+                    {
+                        programId = nacpData.Value.AddOnContentBaseId - 0x1000;
+                    }
+                }
+
+                // TODO: Add icon maybe ?
+            }
+            else
+            {
+                programName = System.IO.Path.GetFileNameWithoutExtension(path);
+
+                executable = new NsoExecutable(new LocalStorage(path, FileAccess.Read), programName);
+            }
+
+            // Explicitly null TitleId to disable the shader cache.
+            Graphics.Gpu.GraphicsConfig.TitleId = null;
+            _device.Gpu.HostInitalized.Set();
+
+            ProcessResult processResult = ProcessLoaderHelper.LoadNsos(_device,
+                                                                       _device.System.KernelContext,
+                                                                       dummyExeFs.GetNpdm(),
+                                                                       nacpData.Value,
+                                                                       diskCacheEnabled: false,
+                                                                       allowCodeMemoryForJit: true,
+                                                                       programName,
+                                                                       programId,
+                                                                       null,
+                                                                       executable);
+
+            // Make sure the process id is valid.
+            if (processResult.ProcessId != 0)
+            {
+                // Load RomFS.
+                if (romfsStream != null)
+                {
+                    _device.Configuration.VirtualFileSystem.SetRomFs(processResult.ProcessId, romfsStream);
+                }
+
+                // Start process.
+                if (_processesByPid.TryAdd(processResult.ProcessId, processResult))
+                {
+                    if (processResult.Start(_device))
+                    {
+                        _latestPid = processResult.ProcessId;
+
+                        return true;
+                    }
+                }
+            }
+
+            return false;
+        }
+    }
+}
+\ No newline at end of file