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