R/Ryujinx/OsHle/Objects/FspSrv/IFile.cs

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using ChocolArm64.Memory;
using Ryujinx.OsHle.Ipc;
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using System;
using System.Collections.Generic;
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using System.IO;
namespace Ryujinx.OsHle.Objects.FspSrv
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{
class IFile : IIpcInterface, IDisposable
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{
private Dictionary<int, ServiceProcessRequest> m_Commands;
public IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
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private Stream BaseStream;
public IFile(Stream BaseStream)
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{
m_Commands = new Dictionary<int, ServiceProcessRequest>()
{
{ 0, Read },
{ 1, Write }
};
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this.BaseStream = BaseStream;
}
public long Read(ServiceCtx Context)
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{
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);
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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)
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{
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);
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return 0;
}
public void Dispose()
{
Dispose(true);
}
protected virtual void Dispose(bool disposing)
{
if (disposing && BaseStream != null)
{
BaseStream.Dispose();
}
}
}
}