Make FileSystemProxy implement IFileSystemProxy

src/LibHac/Common/StringUtils.cs

@@ -33,6 +33,18 @@ namespace LibHac.Common
             return i;
         }
 
+        public static int GetLength(ReadOnlySpan<byte> s, int maxLen)
+        {
+            int i = 0;
+
+            while (i < maxLen && i < s.Length && s[i] != 0)
+            {
+                i++;
+            }
+
+            return i;
+        }
+
         /// <summary>
         /// Concatenates 2 byte strings.
         /// </summary>

src/LibHac/Fs/ContentStorage.cs

@@ -20,7 +20,7 @@ namespace LibHac.Fs
             Result rc = MountHelpers.CheckMountNameAcceptingReservedMountName(mountName);
             if (rc.IsFailure()) return rc;
 
-            FileSystemProxy fsProxy = fs.GetFileSystemProxyServiceObject();
+            IFileSystemProxy fsProxy = fs.GetFileSystemProxyServiceObject();
 
             rc = fsProxy.OpenContentStorageFileSystem(out IFileSystem contentFs, storageId);
             if (rc.IsFailure()) return rc;

src/LibHac/Fs/CustomStorage.cs

@@ -11,7 +11,7 @@ namespace LibHac.Fs
             Result rc = MountHelpers.CheckMountName(mountName);
             if (rc.IsFailure()) return rc;
 
-            FileSystemProxy fsProxy = fs.GetFileSystemProxyServiceObject();
+            IFileSystemProxy fsProxy = fs.GetFileSystemProxyServiceObject();
 
             rc = fsProxy.OpenCustomStorageFileSystem(out IFileSystem customFs, storageId);
             if (rc.IsFailure()) return rc;

src/LibHac/Fs/FileSystemClient.cs

@@ -6,7 +6,7 @@ namespace LibHac.Fs
     public partial class FileSystemClient
     {
         private FileSystemServer FsSrv { get; }
-        private FileSystemProxy FsProxy { get; set; }
+        private IFileSystemProxy FsProxy { get; set; }
         private FileSystemManager FsManager { get; }
 
         private readonly object _fspInitLocker = new object();
@@ -17,7 +17,7 @@ namespace LibHac.Fs
             FsManager = new FileSystemManager(timer);
         }
 
-        public FileSystemProxy GetFileSystemProxyServiceObject()
+        public IFileSystemProxy GetFileSystemProxyServiceObject()
         {
             if (FsProxy != null) return FsProxy;
 

src/LibHac/FsService/FileSystemProxy.cs

@@ -2,10 +2,12 @@
 using LibHac.Common;
 using LibHac.Fs;
 using LibHac.FsSystem;
+using LibHac.Ncm;
+using LibHac.Spl;
 
 namespace LibHac.FsService
 {
-    public class FileSystemProxy
+    public class FileSystemProxy : IFileSystemProxy
     {
         private FileSystemProxyCore FsProxyCore { get; }
 
@@ -17,7 +19,7 @@ namespace LibHac.FsService
 
         public long SaveDataSize { get; private set; }
         public long SaveDataJournalSize { get; private set; }
-        public string SaveDataRootPath { get; private set; }
+        public FsPath SaveDataRootPath { get; } = default;
         public bool AutoCreateSaveData { get; private set; }
 
         private const ulong SaveIndexerId = 0x8000000000000000;
@@ -30,10 +32,19 @@ namespace LibHac.FsService
             CurrentProcess = -1;
             SaveDataSize = 0x2000000;
             SaveDataJournalSize = 0x1000000;
-            SaveDataRootPath = string.Empty;
             AutoCreateSaveData = true;
         }
 
+        public Result OpenFileSystemWithId(out IFileSystem fileSystem, ref FsPath path, TitleId titleId, FileSystemType type)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenFileSystemWithPatch(out IFileSystem fileSystem, TitleId titleId, FileSystemType type)
+        {
+            throw new NotImplementedException();
+        }
+
         public Result SetCurrentProcess(long processId)
         {
             CurrentProcess = processId;
@@ -41,104 +52,100 @@ namespace LibHac.FsService
             return Result.Success;
         }
 
-        public Result DisableAutoSaveDataCreation()
+        public Result GetFreeSpaceSizeForSaveData(out long freeSpaceSize, SaveDataSpaceId spaceId)
         {
-            AutoCreateSaveData = false;
-
-            return Result.Success;
+            throw new NotImplementedException();
         }
 
-        public Result SetSaveDataSize(long saveDataSize, long saveDataJournalSize)
+        public Result OpenDataFileSystemByCurrentProcess(out IFileSystem fileSystem)
         {
-            if (saveDataSize < 0 || saveDataJournalSize < 0)
-            {
-                return ResultFs.InvalidSize;
-            }
-
-            SaveDataSize = saveDataSize;
-            SaveDataJournalSize = saveDataJournalSize;
-
-            return Result.Success;
+            throw new NotImplementedException();
         }
 
-        public Result SetSaveDataRootPath(string path)
+        public Result OpenDataFileSystemByProgramId(out IFileSystem fileSystem, TitleId titleId)
         {
-            // Missing permission check
-
-            if (path.Length > PathTools.MaxPathLength)
-            {
-                return ResultFs.TooLongPath;
-            }
-
-            SaveDataRootPath = path;
-
-            return Result.Success;
+            throw new NotImplementedException();
         }
 
-        public Result OpenBisFileSystem(out IFileSystem fileSystem, string rootPath, BisPartitionId partitionId)
+        public Result OpenDataStorageByCurrentProcess(out IStorage storage)
         {
-            // Missing permission check, speed emulation storage type wrapper, and FileSystemInterfaceAdapter
-
-            return FsProxyCore.OpenBisFileSystem(out fileSystem, rootPath, partitionId);
+            throw new NotImplementedException();
         }
 
-        public Result OpenSdCardFileSystem(out IFileSystem fileSystem)
+        public Result OpenDataStorageByProgramId(out IStorage storage, TitleId programId)
         {
-            // Missing permission check, speed emulation storage type wrapper, and FileSystemInterfaceAdapter
-
-            return FsProxyCore.OpenSdCardFileSystem(out fileSystem);
+            throw new NotImplementedException();
         }
 
-        public Result OpenContentStorageFileSystem(out IFileSystem fileSystem, ContentStorageId storageId)
+        public Result OpenDataStorageByDataId(out IStorage storage, TitleId dataId, StorageId storageId)
         {
-            // Missing permission check, speed emulation storage type wrapper, and FileSystemInterfaceAdapter
-
-            return FsProxyCore.OpenContentStorageFileSystem(out fileSystem, storageId);
+            throw new NotImplementedException();
         }
 
-        public Result OpenCustomStorageFileSystem(out IFileSystem fileSystem, CustomStorageId storageId)
+        public Result OpenPatchDataStorageByCurrentProcess(out IStorage storage)
         {
-            // Missing permission check, speed emulation storage type wrapper, and FileSystemInterfaceAdapter
-
-            return FsProxyCore.OpenCustomStorageFileSystem(out fileSystem, storageId);
+            throw new NotImplementedException();
         }
 
-        public Result OpenSaveDataFileSystemBySystemSaveDataId(out IFileSystem fileSystem, SaveDataSpaceId spaceId,
-            SaveDataAttribute attribute)
+        public Result OpenDataFileSystemWithProgramIndex(out IFileSystem fileSystem, byte programIndex)
         {
-            // Missing permission check, speed emulation storage type wrapper, and FileSystemInterfaceAdapter
-            fileSystem = default;
-
-            if (!IsSystemSaveDataId(attribute.SaveId)) return ResultFs.InvalidArgument.Log();
-
-            Result rc = OpenSaveDataFileSystemImpl(out IFileSystem saveFs, out _, spaceId,
-                attribute, false, true);
-            if (rc.IsFailure()) return rc;
-
-            // Missing check if the current title owns the save data or can open it
-
-            fileSystem = saveFs;
-
-            return Result.Success;
+            throw new NotImplementedException();
         }
 
-        public Result SetSdCardEncryptionSeed(ReadOnlySpan<byte> seed)
+        public Result OpenDataStorageWithProgramIndex(out IStorage storage, byte programIndex)
         {
-            // todo: use struct instead of byte span
-            if (seed.Length != 0x10) return ResultFs.InvalidSize;
+            throw new NotImplementedException();
+        }
 
-            // Missing permission check
+        public Result RegisterSaveDataFileSystemAtomicDeletion(ReadOnlySpan<ulong> saveDataIds)
+        {
+            throw new NotImplementedException();
+        }
 
-            Result rc = FsProxyCore.SetSdCardEncryptionSeed(seed);
-            if (rc.IsFailure()) return rc;
+        public Result DeleteSaveDataFileSystem(ulong saveDataId)
+        {
+            throw new NotImplementedException();
+        }
 
-            // todo: Reset save data indexer
+        public Result DeleteSaveDataFileSystemBySaveDataSpaceId(SaveDataSpaceId spaceId, ulong saveDataId)
+        {
+            throw new NotImplementedException();
+        }
 
-            return Result.Success;
+        public Result DeleteSaveDataFileSystemBySaveDataAttribute(SaveDataSpaceId spaceId, ref SaveDataAttribute2 attribute)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result UpdateSaveDataMacForDebug(SaveDataSpaceId spaceId, ulong saveDataId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result CreateSaveDataFileSystem(ref SaveDataAttribute2 attribute, ref SaveDataCreateInfo createInfo,
+            ref SaveMetaCreateInfo metaCreateInfo)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result CreateSaveDataFileSystemWithHashSalt(ref SaveDataAttribute2 attribute, ref SaveDataCreateInfo createInfo,
+            ref SaveMetaCreateInfo metaCreateInfo, ref HashSalt hashSalt)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result CreateSaveDataFileSystemBySystemSaveDataId(ref SaveDataAttribute2 attribute, ref SaveDataCreateInfo createInfo)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result ExtendSaveDataFileSystem(SaveDataSpaceId spaceId, ulong saveDataId, long dataSize, long journalSize)
+        {
+            throw new NotImplementedException();
         }
 
         private Result OpenSaveDataFileSystemImpl(out IFileSystem fileSystem, out ulong saveDataId,
-            SaveDataSpaceId spaceId, SaveDataAttribute attribute, bool openReadOnly, bool cacheExtraData)
+            SaveDataSpaceId spaceId, ref SaveDataAttribute attribute, bool openReadOnly, bool cacheExtraData)
         {
             bool hasFixedId = attribute.SaveId != 0 && attribute.UserId.Id == Id128.InvalidId;
 
@@ -152,7 +159,7 @@ namespace LibHac.FsService
             }
 
             Result saveFsResult = FsProxyCore.OpenSaveDataFileSystem(out fileSystem, spaceId, saveDataId,
-                SaveDataRootPath, openReadOnly, attribute.Type, cacheExtraData);
+                SaveDataRootPath.ToString(), openReadOnly, attribute.Type, cacheExtraData);
 
             if (saveFsResult.IsSuccess()) return Result.Success;
 
@@ -170,7 +177,395 @@ namespace LibHac.FsService
             return ResultFs.TargetNotFound;
         }
 
-        private bool IsSystemSaveDataId(ulong id)
+        public Result OpenSaveDataFileSystem(out IFileSystem fileSystem, SaveDataSpaceId spaceId, ref SaveDataAttribute attribute)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenReadOnlySaveDataFileSystem(out IFileSystem fileSystem, SaveDataSpaceId spaceId,
+            ref SaveDataAttribute attribute)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenSaveDataFileSystemBySystemSaveDataId(out IFileSystem fileSystem, SaveDataSpaceId spaceId,
+            ref SaveDataAttribute attribute)
+        {
+            // Missing permission check, speed emulation storage type wrapper, and FileSystemInterfaceAdapter
+            fileSystem = default;
+
+            if (!IsSystemSaveDataId(attribute.SaveId)) return ResultFs.InvalidArgument.Log();
+
+            Result rc = OpenSaveDataFileSystemImpl(out IFileSystem saveFs, out _, spaceId,
+                ref attribute, false, true);
+            if (rc.IsFailure()) return rc;
+
+            // Missing check if the current title owns the save data or can open it
+
+            fileSystem = saveFs;
+
+            return Result.Success;
+        }
+
+        public Result ReadSaveDataFileSystemExtraData(Span<byte> extraDataBuffer, ulong saveDataId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result ReadSaveDataFileSystemExtraDataBySaveDataSpaceId(Span<byte> extraDataBuffer, SaveDataSpaceId spaceId,
+            ulong saveDataId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result ReadSaveDataFileSystemExtraDataBySaveDataAttribute(Span<byte> extraDataBuffer, SaveDataSpaceId spaceId,
+            ref SaveDataAttribute2 attribute)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result WriteSaveDataFileSystemExtraData(ulong saveDataId, SaveDataSpaceId spaceId, ReadOnlySpan<byte> extraDataBuffer)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result WriteSaveDataFileSystemExtraDataBySaveDataAttribute(ref SaveDataAttribute2 attribute, SaveDataSpaceId spaceId,
+            ReadOnlySpan<byte> extraDataBuffer, ReadOnlySpan<byte> maskBuffer)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result WriteSaveDataFileSystemExtraDataWithMask(ulong saveDataId, SaveDataSpaceId spaceId, ReadOnlySpan<byte> extraDataBuffer,
+            ReadOnlySpan<byte> maskBuffer)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenImageDirectoryFileSystem(out IFileSystem fileSystem, ImageDirectoryId dirId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result SetBisRootForHost(BisPartitionId partitionId, ref FsPath path)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenBisFileSystem(out IFileSystem fileSystem, ref FsPath rootPath, BisPartitionId partitionId)
+        {
+            fileSystem = default;
+
+            // Missing permission check, speed emulation storage type wrapper, and FileSystemInterfaceAdapter
+
+            Result rc = PathTools.Normalize(out U8Span normalizedPath, rootPath);
+            if (rc.IsFailure()) return rc;
+
+            return FsProxyCore.OpenBisFileSystem(out fileSystem, normalizedPath.ToString(), partitionId);
+        }
+
+        public Result OpenBisStorage(out IStorage storage, BisPartitionId partitionId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result InvalidateBisCache()
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenHostFileSystem(out IFileSystem fileSystem, ref FsPath subPath)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenSdCardFileSystem(out IFileSystem fileSystem)
+        {
+            // Missing permission check, speed emulation storage type wrapper, and FileSystemInterfaceAdapter
+
+            return FsProxyCore.OpenSdCardFileSystem(out fileSystem);
+        }
+
+        public Result FormatSdCardFileSystem()
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result FormatSdCardDryRun()
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result IsExFatSupported(out bool isSupported)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenGameCardStorage(out IStorage storage, GameCardHandle handle, GameCardPartitionRaw partitionId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenDeviceOperator(out IDeviceOperator deviceOperator)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenSaveDataInfoReader(out ISaveDataInfoReader infoReader)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenSaveDataInfoReaderBySaveDataSpaceId(out ISaveDataInfoReader infoReader, SaveDataSpaceId spaceId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenSaveDataInfoReaderWithFilter(out ISaveDataInfoReader infoReader, SaveDataSpaceId spaceId,
+            ref SaveDataFilter filter)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result FindSaveDataWithFilter(out long count, Span<byte> saveDataInfoBuffer, SaveDataSpaceId spaceId,
+            ref SaveDataFilter filter)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenSaveDataInternalStorageFileSystem(out IFileSystem fileSystem, SaveDataSpaceId spaceId, ulong saveDataId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result QuerySaveDataInternalStorageTotalSize(out long size, SaveDataSpaceId spaceId, ulong saveDataId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result GetSaveDataCommitId(out long commitId, SaveDataSpaceId spaceId, ulong saveDataId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenSaveDataInfoReaderOnlyCacheStorage(out ISaveDataInfoReader infoReader)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenSaveDataMetaFile(out IFile file, SaveDataSpaceId spaceId, ref SaveDataAttribute2 attribute,
+            SaveMetaType type)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result DeleteCacheStorage(short index)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result GetCacheStorageSize(out long dataSize, out long journalSize, short index)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result ListAccessibleSaveDataOwnerId(out int readCount, Span<TitleId> idBuffer, TitleId programId, int startIndex,
+            int bufferIdCount)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result SetSaveDataSize(long saveDataSize, long saveDataJournalSize)
+        {
+            if (saveDataSize < 0 || saveDataJournalSize < 0)
+            {
+                return ResultFs.InvalidSize;
+            }
+
+            SaveDataSize = saveDataSize;
+            SaveDataJournalSize = saveDataJournalSize;
+
+            return Result.Success;
+        }
+        public Result SetSaveDataRootPath(ref FsPath path)
+        {
+            // Missing permission check
+
+            if (StringUtils.GetLength(path.Str, FsPath.MaxLength + 1) > FsPath.MaxLength)
+            {
+                return ResultFs.TooLongPath;
+            }
+
+            StringUtils.Copy(SaveDataRootPath.Str, path.Str);
+
+            return Result.Success;
+        }
+
+        public Result OpenContentStorageFileSystem(out IFileSystem fileSystem, ContentStorageId storageId)
+        {
+            // Missing permission check, speed emulation storage type wrapper, and FileSystemInterfaceAdapter
+
+            return FsProxyCore.OpenContentStorageFileSystem(out fileSystem, storageId);
+        }
+
+        public Result OpenCloudBackupWorkStorageFileSystem(out IFileSystem fileSystem, CloudBackupWorkStorageId storageId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenCustomStorageFileSystem(out IFileSystem fileSystem, CustomStorageId storageId)
+        {
+            // Missing permission check, speed emulation storage type wrapper, and FileSystemInterfaceAdapter
+
+            return FsProxyCore.OpenCustomStorageFileSystem(out fileSystem, storageId);
+        }
+
+        public Result OpenGameCardFileSystem(out IFileSystem fileSystem, GameCardHandle handle, GameCardPartition partitionId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result QuerySaveDataTotalSize(out long totalSize, long dataSize, long journalSize)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result SetCurrentPosixTimeWithTimeDifference(long time, int difference)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result GetRightsId(out RightsId rightsId, TitleId programId, StorageId storageId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result GetRightsIdByPath(out RightsId rightsId, ref FsPath path)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result GetRightsIdAndKeyGenerationByPath(out RightsId rightsId, out byte keyGeneration, ref FsPath path)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result RegisterExternalKey(ref RightsId rightsId, ref AccessKey externalKey)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result UnregisterExternalKey(ref RightsId rightsId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result UnregisterAllExternalKey()
+        {
+            throw new NotImplementedException();
+        }
+        public Result SetSdCardEncryptionSeed(ReadOnlySpan<byte> seed)
+        {
+            // todo: use struct instead of byte span
+            if (seed.Length != 0x10) return ResultFs.InvalidSize;
+
+            // Missing permission check
+
+            Result rc = FsProxyCore.SetSdCardEncryptionSeed(seed);
+            if (rc.IsFailure()) return rc;
+
+            // todo: Reset save data indexer
+
+            return Result.Success;
+        }
+
+        public Result VerifySaveDataFileSystemBySaveDataSpaceId(SaveDataSpaceId spaceId, ulong saveDataId, Span<byte> readBuffer)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result VerifySaveDataFileSystem(ulong saveDataId, Span<byte> readBuffer)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result CorruptSaveDataFileSystemByOffset(SaveDataSpaceId spaceId, ulong saveDataId, long offset)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result CorruptSaveDataFileSystemBySaveDataSpaceId(SaveDataSpaceId spaceId, ulong saveDataId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result CorruptSaveDataFileSystem(ulong saveDataId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result CreatePaddingFile(long size)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result DeleteAllPaddingFiles()
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result DisableAutoSaveDataCreation()
+        {
+            AutoCreateSaveData = false;
+
+            return Result.Success;
+        }
+
+        public Result SetGlobalAccessLogMode(int mode)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result GetGlobalAccessLogMode(out int mode)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result GetProgramIndexForAccessLog(out int programIndex, out int programCount)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OutputAccessLogToSdCard(U8Span logString)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result RegisterUpdatePartition()
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OpenRegisteredUpdatePartition(out IFileSystem fileSystem)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result OverrideSaveDataTransferTokenSignVerificationKey(ReadOnlySpan<byte> key)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result SetSdCardAccessibility(bool isAccessible)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result IsSdCardAccessible(out bool isAccessible)
+        {
+            throw new NotImplementedException();
+        }
+
+        private static bool IsSystemSaveDataId(ulong id)
         {
             return (long)id < 0;
         }

src/LibHac/FsService/FileSystemServer.cs

@@ -47,7 +47,7 @@ namespace LibHac.FsService
             return new FileSystemClient(this, timer);
         }
 
-        public FileSystemProxy CreateFileSystemProxyService()
+        public IFileSystemProxy CreateFileSystemProxyService()
         {
             return new FileSystemProxy(FsProxyCore, FsClient);
         }

src/LibHac/FsSystem/FsPath.cs

@@ -15,6 +15,7 @@ namespace LibHac.FsSystem
 
         public Span<byte> Str => SpanHelpers.CreateSpan(ref _str, MaxLength + 1);
 
+        public static implicit operator U8Span(FsPath value) => new U8Span(value.Str);
         public override string ToString() => StringUtils.Utf8ZToString(Str);
     }
 }

src/LibHac/FsSystem/PathTools.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Diagnostics;
 using System.Runtime.CompilerServices;
+using LibHac.Common;
 using LibHac.Fs;
 
 #if HAS_FILE_SYSTEM_NAME
@@ -51,6 +52,20 @@ namespace LibHac.FsSystem
             return normalized;
         }
 
+        public static Result Normalize(out U8Span normalizedPath, U8Span path)
+        {
+            if (path.Length == 0)
+            {
+                normalizedPath = path;
+                return Result.Success;
+            }
+
+            // Todo: optimize
+            normalizedPath = new U8Span(Normalize(path.ToString()));
+
+            return Result.Success;
+        }
+
         // Licensed to the .NET Foundation under one or more agreements.
         // The .NET Foundation licenses this file to you under the MIT license.
         // See the LICENSE file in the project root for more information.