public void TimeSectionValuesRoundTrip()
{
var ms = new MemoryStream();
var fio = new FileIO(ms);
var fw = new FormattedWriter(fio);
var wc = new WriteContext(fw);
wc.Description = new TeaFileDescription();
wc.Description.ItemDescription = ItemDescription.FromAnalysis <Event <C> >();
Time.Scale = Timescale.FromEpoch(33, 77);
wc.Description.Timescale = Time.Scale;
ISectionFormatter f = new TimeSectionFormatter();
f.Write(wc);
ms.Position = 0;
var fr = new FormattedReader(fio);
var rc = new ReadContext(fr);
rc.Description.Should().Not.Be.Null();
rc.Description.ItemDescription = wc.Description.ItemDescription;
f.Read(rc);
rc.Description.Timescale.Value.Epoch.Should().Be(33);
rc.Description.Timescale.Value.TicksPerDay.Should().Be(77);
Executing.This(() => f.Read(rc)).Should().Throw <EndOfStreamException>();
}
public void Read(ReadContext c)
{
// time scale
var epoch = c.Reader.ReadInt64();
var ticksPerDay = c.Reader.ReadInt64();
c.Description.Timescale = Timescale.FromEpoch(epoch, ticksPerDay);
// time fields
var timeFieldsCount = c.Reader.ReadInt32();
var offsets = new List <int>();
timeFieldsCount.Times(() =>
offsets.Add(c.Reader.ReadInt32()));
c.Description.TimeFieldOffsets = offsets.AsReadOnly();
// adorn item description with time aspects, if available
var id = c.Description.ItemDescription;
if (id != null)
{
bool isFirstTimeField = true;
foreach (var offset in offsets)
{
var f = id.FindFieldByOffset(offset);
if (f == null)
{
throw new FileFormatException("Time format section contains an entry for a field at offset {0} but no such field was found in the item description.");
}
f.IsTime = true;
f.IsEventTime = isFirstTimeField;
isFirstTimeField = false;
}
}
}
