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

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using LibHac;
using LibHac.Common;
using LibHac.Sf;
using Ryujinx.HLE.HOS.Ipc;
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namespace Ryujinx.HLE.HOS.Services.Fs.FileSystemProxy
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{
class IStorage : DisposableIpcService
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{
private SharedRef<LibHac.FsSrv.Sf.IStorage> _baseStorage;
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public IStorage(ref SharedRef<LibHac.FsSrv.Sf.IStorage> baseStorage)
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{
_baseStorage = SharedRef<LibHac.FsSrv.Sf.IStorage>.CreateMove(ref baseStorage);
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}
[CommandHipc(0)]
// Read(u64 offset, u64 length) -> buffer<u8, 0x46, 0> buffer
public ResultCode Read(ServiceCtx context)
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{
ulong offset = context.RequestData.ReadUInt64();
ulong size = context.RequestData.ReadUInt64();
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if (context.Request.ReceiveBuff.Count > 0)
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{
ulong bufferAddress = context.Request.ReceiveBuff[0].Position;
ulong bufferLen = context.Request.ReceiveBuff[0].Size;
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// Use smaller length to avoid overflows.
if (size > bufferLen)
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{
size = bufferLen;
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}
using (var region = context.Memory.GetWritableRegion(bufferAddress, (int)bufferLen, true))
{
Result result = _baseStorage.Get.Read((long)offset, new OutBuffer(region.Memory.Span), (long)size);
return (ResultCode)result.Value;
}
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}
return ResultCode.Success;
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}
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[CommandHipc(4)]
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// GetSize() -> u64 size
public ResultCode GetSize(ServiceCtx context)
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{
Result result = _baseStorage.Get.GetSize(out long size);
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context.ResponseData.Write(size);
return (ResultCode)result.Value;
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}
protected override void Dispose(bool isDisposing)
{
if (isDisposing)
{
_baseStorage.Destroy();
}
}
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}
}