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Ryujinx/Ryujinx.HLE/HOS/HomebrewRomFsStream.cs

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using System;
using System.IO;
namespace Ryujinx.HLE.HOS
{
class HomebrewRomFsStream : Stream
{
private Stream _baseStream;
private long _positionOffset;
public HomebrewRomFsStream(Stream baseStream, long positionOffset)
{
_baseStream = baseStream;
_positionOffset = positionOffset;
_baseStream.Position = _positionOffset;
}
public override bool CanRead => _baseStream.CanRead;
public override bool CanSeek => _baseStream.CanSeek;
public override bool CanWrite => false;
public override long Length => _baseStream.Length - _positionOffset;
public override long Position
{
get
{
return _baseStream.Position - _positionOffset;
}
set
{
_baseStream.Position = value + _positionOffset;
}
}
public override void Flush()
{
_baseStream.Flush();
}
public override int Read(byte[] buffer, int offset, int count)
{
return _baseStream.Read(buffer, offset, count);
}
public override long Seek(long offset, SeekOrigin origin)
{
if (origin == SeekOrigin.Begin)
{
offset += _positionOffset;
}
return _baseStream.Seek(offset, origin);
}
public override void SetLength(long value)
{
throw new NotImplementedException();
}
public override void Write(byte[] buffer, int offset, int count)
{
throw new NotImplementedException();
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
_baseStream.Dispose();
}
}
}
}