Ipc refactor (#9)

* Start refactoring IPC objects (started with IFile and IFileSystem)

* End refactoring IPC objects (#8)

* End refactoring IPC objects

* End refactoring IPC objects

corrections

Ryujinx/OsHle/Objects/FspSrv/IFile.cs

@@ -0,0 +1,79 @@
+using ChocolArm64.Memory;
+using Ryujinx.OsHle.Ipc;
+using System;
+using System.Collections.Generic;
+using System.IO;
+
+namespace Ryujinx.OsHle.Objects.FspSrv
+{
+    class IFile : IIpcInterface, IDisposable
+    {
+        private Dictionary<int, ServiceProcessRequest> m_Commands;
+
+        public IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
+
+        private Stream BaseStream;
+
+        public IFile(Stream BaseStream)
+        {
+            m_Commands = new Dictionary<int, ServiceProcessRequest>()
+            {
+                { 0, Read  },
+                { 1, Write }
+            };
+
+            this.BaseStream = BaseStream;
+        }
+
+        public long Read(ServiceCtx Context)
+        {
+            long Position = Context.Request.ReceiveBuff[0].Position;
+
+            long Zero   = Context.RequestData.ReadInt64();
+            long Offset = Context.RequestData.ReadInt64();
+            long Size   = Context.RequestData.ReadInt64();
+
+            byte[] Data = new byte[Size];
+
+            int ReadSize = BaseStream.Read(Data, 0, (int)Size);
+
+            AMemoryHelper.WriteBytes(Context.Memory, Position, Data);
+
+            //TODO: Use ReadSize, we need to return the size that was REALLY read from the file.
+            //This is a workaround because we are doing something wrong and the game expects to read
+            //data from a file that doesn't yet exists -- and breaks if it can't read anything.
+            Context.ResponseData.Write((long)Size);
+
+            return 0;
+        }
+
+        public long Write(ServiceCtx Context)
+        {
+            long Position = Context.Request.SendBuff[0].Position;
+
+            long Zero   = Context.RequestData.ReadInt64();
+            long Offset = Context.RequestData.ReadInt64();
+            long Size   = Context.RequestData.ReadInt64();
+
+            byte[] Data = AMemoryHelper.ReadBytes(Context.Memory, Position, (int)Size);
+
+            BaseStream.Seek(Offset, SeekOrigin.Begin);
+            BaseStream.Write(Data, 0, (int)Size);
+
+            return 0;
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing && BaseStream != null)
+            {
+                BaseStream.Dispose();
+            }
+        }
+    }
+}