private static int CopyToImpl(IntPtr thisPtr, IntPtr streamPointer, long numberOfBytes, out long numberOfBytesRead, out long numberOfBytesWritten)
{
numberOfBytesRead = 0;
numberOfBytesWritten = 0;
try
{
IStreamShadow shadow = ToShadow <IStreamShadow>(thisPtr);
IStream callback = ((IStream)shadow.Callback);
numberOfBytesRead = callback.CopyTo(new ComStream(streamPointer), numberOfBytes, out numberOfBytesWritten);
}
catch (Exception exception)
{
return((int)Result.GetResultFromException(exception));
}
return(Result.Ok.Code);
}
private static Result StatImpl(IntPtr thisPtr, ref StorageStatistics.__Native statisticsPtr, StorageStatisticsFlags flags)
{
try
{
IStreamShadow shadow = ToShadow <IStreamShadow>(thisPtr);
IStream callback = ((IStream)shadow.Callback);
StorageStatistics statistics = callback.GetStatistics(flags);
statistics.__MarshalTo(ref statisticsPtr);
}
catch (SharpGenException exception)
{
return(exception.ResultCode);
}
catch (Exception)
{
return(Result.Fail.Code);
}
return(Result.Ok);
}
private static Result UnlockRegionImpl(IntPtr thisPtr, long offset, long numberOfBytes, LockType lockType)
{
Result result = Result.Ok;
try
{
IStreamShadow shadow = ToShadow <IStreamShadow>(thisPtr);
IStream callback = ((IStream)shadow.Callback);
callback.UnlockRegion(offset, numberOfBytes, lockType);
}
catch (SharpGenException exception)
{
result = exception.ResultCode;
}
catch (Exception)
{
result = Result.Fail.Code;
}
return(result);
}
private static Result RevertImpl(IntPtr thisPtr)
{
Result result = Result.Ok;
try
{
IStreamShadow shadow = ToShadow <IStreamShadow>(thisPtr);
IStream callback = ((IStream)shadow.Callback);
callback.Revert();
}
catch (SharpGenException exception)
{
result = exception.ResultCode;
}
catch (Exception)
{
result = Result.Fail.Code;
}
return(result);
}
private static unsafe int SeekImpl(IntPtr thisPtr, long offset, SeekOrigin origin, IntPtr newPosition)
{
try
{
IStreamShadow shadow = ToShadow <IStreamShadow>(thisPtr);
IStream callback = ((IStream)shadow.Callback);
long position = callback.Seek(offset, origin);
// pointer can be null, so we need to test it
if (newPosition != IntPtr.Zero)
{
*(long *)newPosition = position;
}
}
catch (Exception exception)
{
return((int)Result.GetResultFromException(exception));
}
return(Result.Ok.Code);
}
private static Result CloneImpl(IntPtr thisPtr, out IntPtr streamPointer)
{
streamPointer = IntPtr.Zero;
var result = Result.Ok;
try
{
var shadow = ToShadow <IStreamShadow>(thisPtr);
var callback = ((IStream)shadow.Callback);
var clone = callback.Clone();
streamPointer = IStreamShadow.ToIntPtr(clone);
}
catch (SharpGenException exception)
{
result = exception.ResultCode;
}
catch (Exception)
{
result = Result.Fail.Code;
}
return(result);
}
