protected override Result DoOperateRange(Span <byte> outBuffer, OperationId operationId, long offset, long size, ReadOnlySpan <byte> inBuffer)
{
switch (operationId)
{
case OperationId.InvalidateCache:
case OperationId.QueryRange:
if (size == 0)
{
if (operationId == OperationId.QueryRange)
{
if (outBuffer.Length != Unsafe.SizeOf <QueryRangeInfo>())
{
return(ResultFs.InvalidSize.Log());
}
Unsafe.As <byte, QueryRangeInfo>(ref outBuffer[0]) = new QueryRangeInfo();
}
return(Result.Success);
}
Result rc = UpdateSize();
if (rc.IsFailure())
{
return(rc);
}
if (size < 0 || offset < 0)
{
return(ResultFs.OutOfRange.Log());
}
return(BaseFile.OperateRange(outBuffer, operationId, offset, size, inBuffer));
default:
return(ResultFs.UnsupportedOperateRangeForFileStorage.Log());
}
}