Implement NGC service (#5681)

* Implement NGC service

* Use raw byte arrays instead of string for _wordSeparators

* Silence IDE0230 for _wordSeparators

* Try to silence warning about _rangeValuesCount not being read on SparseSet

* Make AcType enum private

* Add abstract methods and one TODO that I forgot

* PR feedback

* More PR feedback

* More PR feedback

1 files changed, 16 insertions, 0 deletions

diff --git a/src/Ryujinx.Horizon/Sdk/Fs/IFsClient.cs b/src/Ryujinx.Horizon/Sdk/Fs/IFsClient.cs
new file mode 100644
index 00000000..caf6b03e
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Fs/IFsClient.cs
@@ -0,0 +1,16 @@
+using Ryujinx.Horizon.Common;
+using System;
+
+namespace Ryujinx.Horizon.Sdk.Fs
+{
+    public interface IFsClient
+    {
+        Result QueryMountSystemDataCacheSize(out long size, ulong dataId);
+        Result MountSystemData(string mountName, ulong dataId);
+        Result OpenFile(out FileHandle handle, string path, OpenMode openMode);
+        Result ReadFile(FileHandle handle, long offset, Span<byte> destination);
+        Result GetFileSize(out long size, FileHandle handle);
+        void CloseFile(FileHandle handle);
+        void Unmount(string mountName);
+    }
+}