private void WriteUnifiedData(DataRecordArrayWriter writer, List <VTTQs> variables)
{
HistReader[] vars = variables.Select(v => new HistReader(v)).ToArray();
writer.WriteArrayStart();
bool hasNext = vars.Any(v => v.HasValue);
while (hasNext)
{
writer.WriteRecordStart();
Timestamp time = Timestamp.Max;
foreach (var reader in vars)
{
Timestamp?t = reader.Time;
if (t.HasValue && t.Value < time)
{
time = t.Value;
}
}
writer.WriteValueTimestamp(time);
foreach (var reader in vars)
{
writer.WriteColumSeparator();
Timestamp?t = reader.Time;
if (t.HasValue && t.Value == time)
{
DataValue v = reader.Value;
if (IsSimpleDouble(v.JSON))
{
writer.WriteValueJsonDouble(v.JSON);
}
else
{
double?value = v.AsDouble();
if (value.HasValue)
{
writer.WriteValueDouble(value.Value);
}
else
{
writer.WriteValueEmpty();
}
}
reader.MoveNext();
}
else
{
writer.WriteValueEmpty();
}
}
hasNext = vars.Any(v => v.HasValue);
writer.WriteRecordEnd(hasMoreRecords: hasNext);
}
writer.WriteArrayEnd();
}
