public static Delegate?GetDirectReader()
{
if (typeof(TLogical) == typeof(bool) ||
typeof(TLogical) == typeof(int) ||
typeof(TLogical) == typeof(long) ||
typeof(TLogical) == typeof(Int96) ||
typeof(TLogical) == typeof(float) ||
typeof(TLogical) == typeof(double))
{
return(LogicalRead.GetDirectReader <TPhysical, TPhysical>());
}
if (typeof(TLogical) == typeof(uint))
{
return(LogicalRead.GetDirectReader <uint, int>());
}
if (typeof(TLogical) == typeof(ulong))
{
return(LogicalRead.GetDirectReader <ulong, long>());
}
return(null);
}
/// <summary>
/// Return a reader delegate if a TPhysical column reader can directly write into a TLogical span (e.g. float to float, int to uint, etc).
/// Otherwise return null. This is an optimisation to avoid needless memory copies between buffers (i.e. otherwise we have to use the
/// identity converter).
/// </summary>
/// <returns>
/// A delegate of type LogicalRead<TLogical, TPhysical>.DirectReader
/// </returns>
public virtual Delegate?GetDirectReader <TLogical, TPhysical>()
where TPhysical : unmanaged
{
return(LogicalRead <TLogical, TPhysical> .GetDirectReader());
}