Ryujinx/Ryujinx.HLE/HOS/Services/Fs/FileSystemProxy/IStorage.cs

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using LibHac;
using Ryujinx.HLE.HOS.Ipc;
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namespace Ryujinx.HLE.HOS.Services.Fs.FileSystemProxy
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{
class IStorage : IpcService
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{
private LibHac.Fs.IStorage _baseStorage;
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public IStorage(LibHac.Fs.IStorage baseStorage)
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{
_baseStorage = baseStorage;
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}
[Command(0)]
// Read(u64 offset, u64 length) -> buffer<u8, 0x46, 0> buffer
public ResultCode Read(ServiceCtx context)
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{
long offset = context.RequestData.ReadInt64();
long size = context.RequestData.ReadInt64();
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if (context.Request.ReceiveBuff.Count > 0)
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{
IpcBuffDesc buffDesc = context.Request.ReceiveBuff[0];
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// Use smaller length to avoid overflows.
if (size > buffDesc.Size)
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{
size = buffDesc.Size;
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}
byte[] data = new byte[size];
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try
{
_baseStorage.Read(data, offset);
}
catch (HorizonResultException ex)
{
return (ResultCode)ex.ResultValue.Value;
}
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context.Memory.WriteBytes(buffDesc.Position, data);
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}
return ResultCode.Success;
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}
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[Command(4)]
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// GetSize() -> u64 size
public ResultCode GetSize(ServiceCtx context)
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{
try
{
context.ResponseData.Write(_baseStorage.GetSize());
}
catch (HorizonResultException ex)
{
return (ResultCode)ex.ResultValue.Value;
}
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return ResultCode.Success;
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}
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}
}