Code style fixes and nits on the HLE project (#355)

* Some style fixes and nits on ITimeZoneService

* Remove some unneeded usings

* Remove the Ryujinx.HLE.OsHle.Handles namespace

* Remove hbmenu automatic load on process exit

* Rename Ns to Device, rename Os to System, rename SystemState to State

* Move Exceptions and Utilities out of OsHle

* Rename OsHle to HOS

* Rename OsHle folder to HOS

* IManagerDisplayService and ISystemDisplayService style fixes

* BsdError shouldn't be public

* Add a empty new line before using static

* Remove unused file

* Some style fixes on NPDM

* Exit gracefully when the application is closed

* Code style fixes on IGeneralService

* Add 0x prefix on values printed as hex

* Small improvements on finalization code

* Move ProcessId and ThreadId out of AThreadState

* Rename VFs to FileSystem

* FsAccessHeader shouldn't be public. Also fix file names casing

* More case changes on NPDM

* Remove unused files

* Move using to the correct place on NPDM

* Use properties on KernelAccessControlMmio

* Address PR feedback

Ryujinx.HLE/HOS/Services/FspSrv/IDirectory.cs

@@ -0,0 +1,116 @@
+using Ryujinx.HLE.HOS.Ipc;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+
+namespace Ryujinx.HLE.HOS.Services.FspSrv
+{
+    class IDirectory : IpcService, IDisposable
+    {
+        private const int DirectoryEntrySize = 0x310;
+
+        private Dictionary<int, ServiceProcessRequest> m_Commands;
+
+        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
+
+        private List<string> DirectoryEntries;
+
+        private int CurrentItemIndex;
+
+        public event EventHandler<EventArgs> Disposed;
+
+        public string HostPath { get; private set; }
+
+        public IDirectory(string HostPath, int Flags)
+        {
+            m_Commands = new Dictionary<int, ServiceProcessRequest>()
+            {
+                { 0, Read          },
+                { 1, GetEntryCount }
+            };
+
+            this.HostPath = HostPath;
+
+            DirectoryEntries = new List<string>();
+
+            if ((Flags & 1) != 0)
+            {
+                DirectoryEntries.AddRange(Directory.GetDirectories(HostPath));
+            }
+
+            if ((Flags & 2) != 0)
+            {
+                DirectoryEntries.AddRange(Directory.GetFiles(HostPath));
+            }
+
+            CurrentItemIndex = 0;
+        }
+
+        public long Read(ServiceCtx Context)
+        {
+            long BufferPosition = Context.Request.ReceiveBuff[0].Position;
+            long BufferLen      = Context.Request.ReceiveBuff[0].Size;
+
+            int MaxReadCount = (int)(BufferLen / DirectoryEntrySize);
+
+            int Count = Math.Min(DirectoryEntries.Count - CurrentItemIndex, MaxReadCount);
+
+            for (int Index = 0; Index < Count; Index++)
+            {
+                long Position = BufferPosition + Index * DirectoryEntrySize;
+
+                WriteDirectoryEntry(Context, Position, DirectoryEntries[CurrentItemIndex++]);
+            }
+
+            Context.ResponseData.Write((long)Count);
+
+            return 0;
+        }
+
+        private void WriteDirectoryEntry(ServiceCtx Context, long Position, string FullPath)
+        {
+            for (int Offset = 0; Offset < 0x300; Offset += 8)
+            {
+                Context.Memory.WriteInt64(Position + Offset, 0);
+            }
+
+            byte[] NameBuffer = Encoding.UTF8.GetBytes(Path.GetFileName(FullPath));
+
+            Context.Memory.WriteBytes(Position, NameBuffer);
+
+            int  Type = 0;
+            long Size = 0;
+
+            if (File.Exists(FullPath))
+            {
+                Type = 1;
+                Size = new FileInfo(FullPath).Length;
+            }
+
+            Context.Memory.WriteInt32(Position + 0x300, 0); //Padding?
+            Context.Memory.WriteInt32(Position + 0x304, Type);
+            Context.Memory.WriteInt64(Position + 0x308, Size);
+        }
+
+        public long GetEntryCount(ServiceCtx Context)
+        {
+            Context.ResponseData.Write((long)DirectoryEntries.Count);
+
+            return 0;
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                Disposed?.Invoke(this, EventArgs.Empty);
+            }
+        }
+    }
+}