internal CmdStream Create()
{
// Start out by faking a merge of the whole main branch into itself
var ms = new MergeSpan(Main, 0, Main.Info.CommandCount - 1, Main, 0);
Link(ms);
// Follow ancestors as well (up to the branch point)
for (Branch b = Main; b != null; b = b.Parent)
{
Debug.Assert(b.Commands.Count > 0);
if (b.Parent != null)
{
uint maxCmd = 0;
// The ICreateBranch command may not be the last
// command pushed to the results (it's possible that
// a parent span has been injected prior to the branch
// creation step). But if that does happen, confirm
// that the last command we do have is immediately
// after the branch point.
Debug.Assert(Result.Count > 0);
Cmd last = Result.Peek();
if (last.Data.Sequence == 0)
{
Debug.Assert(Object.ReferenceEquals(last.Branch, b));
Debug.Assert(last.Data.CmdName == nameof(ICreateBranch));
Debug.Assert(Object.ReferenceEquals(b.Commands[0], last.Data));
maxCmd = (last.Data as ICreateBranch).CommandCount - 1;
}
else
{
Debug.Assert(Object.ReferenceEquals(last.Branch, b.Parent));
Debug.Assert(b.Commands[0].CmdName == nameof(ICreateBranch));
Debug.Assert((b.Commands[0] as ICreateBranch).CommandCount == last.Data.Sequence);
maxCmd = last.Data.Sequence - 1;
}
ms = new MergeSpan(b.Parent, 0, maxCmd, b, 0);
Link(ms);
}
}
// Confirm that all merge spans have been processed
foreach (CmdData cd in GetAllData())
{
MergeSpan[] spans = PopMergeSpans(cd).ToArray();
if (spans.Length > 0)
{
throw new ApplicationException("Not all merge spans were processed");
}
}
// Apply any updates
Log.Info($"Loaded stream with {Result.Count} commands");
return(new CmdStream(Main, Result));
}
CmdData[] GetSourceData(MergeSpan ms)
{
Branch source = ms.Source;
uint numCmd = ms.MaxCmd + 1;
if (Data.TryGetValue(source, out CmdData[] data))
