private long Seek(ref RetroVfsFileHandle stream, long offset, int seek)
{
var hPtr = stream.handle;
if (!_fileDictionary.ContainsKey(hPtr))
{
return(-1);
}
SeekOrigin seekOrigin;
switch (seek)
{
case 0:
seekOrigin = SeekOrigin.Begin;
break;
case 1:
seekOrigin = SeekOrigin.Current;
break;
case 2:
seekOrigin = SeekOrigin.End;
break;
default:
return(-1);
}
return(_fileDictionary[hPtr].Seek(offset, seekOrigin));
}
private int Close(ref RetroVfsFileHandle stream)
{
var hPtr = stream.handle;
if (!_fileDictionary.ContainsKey(hPtr))
{
return(-1);
}
try
{
using (var fileStream = _fileDictionary[hPtr])
{
if (!_fileDictionary.Remove(hPtr))
{
return(-1);
}
fileStream.Close();
return(0);
}
}
catch
{
return(-1);
}
}
private long Tell(ref RetroVfsFileHandle stream)
{
var hPtr = stream.handle;
if (!_fileDictionary.ContainsKey(hPtr))
{
return(-1);
}
return(_fileDictionary[hPtr].Position);
}
private long Size(ref RetroVfsFileHandle stream)
{
var hPtr = stream.handle;
if (!_fileDictionary.ContainsKey(hPtr))
{
return(-1);
}
return(_fileDictionary[hPtr].Length);
}
private int Flush(ref RetroVfsFileHandle stream)
{
var hPtr = stream.handle;
if (!_fileDictionary.ContainsKey(hPtr))
{
return(-1);
}
_fileDictionary[hPtr].Flush();
return(0);
}
private long Write(ref RetroVfsFileHandle stream, IntPtr s, ulong len)
{
var hPtr = stream.handle;
if (!_fileDictionary.ContainsKey(hPtr) || len > int.MaxValue)
{
return(-1);
}
var data = new byte[len];
Marshal.Copy(s, data, 0, (int)len);
_fileDictionary[hPtr].Write(data, 0, (int)len);
return((int)len);
}
private long Read(ref RetroVfsFileHandle stream, IntPtr s, ulong len)
{
var hPtr = stream.handle;
if (!_fileDictionary.ContainsKey(hPtr) || len > int.MaxValue)
{
return(-1);
}
var data = new byte[len];
var fileStream = _fileDictionary[hPtr];
var res = fileStream.Read(data, 0, (int)len);
Marshal.Copy(data, 0, s, data.Length);
return(res);
}
private string GetPath(ref RetroVfsFileHandle stream)
{
return(!_fileDictionary.ContainsKey(stream.handle) ? null : _fileDictionary[stream.handle].Name);
}
