rjx-mirror/Ryujinx.HLE/HOS/Services/FspSrv/IStorage.cs
2019-02-15 16:44:25 +01:00

64 lines
1.7 KiB
C#

using Ryujinx.HLE.HOS.Ipc;
using System.Collections.Generic;
using System.IO;
namespace Ryujinx.HLE.HOS.Services.FspSrv
{
class IStorage : IpcService
{
private Dictionary<int, ServiceProcessRequest> _commands;
public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => _commands;
private Stream _baseStream;
public IStorage(Stream baseStream)
{
_commands = new Dictionary<int, ServiceProcessRequest>
{
{ 0, Read },
{ 4, GetSize }
};
_baseStream = baseStream;
}
// Read(u64 offset, u64 length) -> buffer<u8, 0x46, 0> buffer
public long Read(ServiceCtx context)
{
long offset = context.RequestData.ReadInt64();
long size = context.RequestData.ReadInt64();
if (context.Request.ReceiveBuff.Count > 0)
{
IpcBuffDesc buffDesc = context.Request.ReceiveBuff[0];
//Use smaller length to avoid overflows.
if (size > buffDesc.Size)
{
size = buffDesc.Size;
}
byte[] data = new byte[size];
lock (_baseStream)
{
_baseStream.Seek(offset, SeekOrigin.Begin);
_baseStream.Read(data, 0, data.Length);
}
context.Memory.WriteBytes(buffDesc.Position, data);
}
return 0;
}
// GetSize() -> u64 size
public long GetSize(ServiceCtx context)
{
context.ResponseData.Write(_baseStream.Length);
return 0;
}
}
}