FullStream GenerateInitialStream(FileSystemObject fso, Dictionary<Guid, BackupStream> knownGuids)
{
if (!ShouldBeAdded(fso, knownGuids))
{
FixUpStreamReference(fso, knownGuids);
return null;
}
var ret = new FullStream
{
UniqueId = fso.StreamUniqueId,
PhysicalSize = fso.Size,
VirtualSize = fso.Size,
};
if (fso.FileSystemGuid != null)
knownGuids[fso.FileSystemGuid.Value] = ret;
ret.FileSystemObjects.Add(fso);
return ret;
}
private BackupStream CheckAndMaybeAdd(FileSystemObject fso, Dictionary<Guid, BackupStream> knownGuids)
{
if (!ShouldBeAdded(fso, knownGuids))
{
FixUpStreamReference(fso, knownGuids);
return null;
}
int existingVersion = -1;
if (fso.BackupMode != BackupMode.ForceFull && !FileHasChanged(fso, out existingVersion))
fso.BackupMode = BackupMode.Unmodified;
BackupStream newStream;
switch (fso.BackupMode)
{
case BackupMode.Unmodified:
newStream = new UnmodifiedStream
{
UniqueId = fso.StreamUniqueId,
ContainingVersion = existingVersion,
VirtualSize = fso.Size,
};
newStream.FileSystemObjects.Add(fso);
break;
case BackupMode.ForceFull:
case BackupMode.Full:
newStream = new FullStream
{
UniqueId = fso.StreamUniqueId,
PhysicalSize = fso.Size,
VirtualSize = fso.Size,
};
newStream.FileSystemObjects.Add(fso);
break;
case BackupMode.Rsync:
throw new NotImplementedException("Differential backup not implemented.");
default:
throw new ArgumentOutOfRangeException();
}
if (fso.FileSystemGuid != null)
knownGuids[fso.FileSystemGuid.Value] = newStream;
return newStream;
}
