def CopyEntries(to, tree, option=""):
nbytes = 0
treeEntries = tree.GetEntriesFast()
nentries = treeEntries
#// Quickly copy the basket without decompression and streaming.
totbytes = to.GetTotBytes()
i = 0
while i < nentries:
if tree.LoadTree(i) < 0:
break
if to.GetDirectory():
file2 = to.GetDirectory().GetFile()
if file2 and (file2.GetEND() > TTree.GetMaxTreeSize()):
if to.GetDirectory() == file2:
to.ChangeFile(file2)
cloner = TTreeCloner(tree.GetTree(), to, option,
TTreeCloner.kNoWarnings)
if cloner.IsValid():
to.SetEntries(to.GetEntries() + tree.GetTree().GetEntries())
cloner.Exec()
else:
if i == 0:
# If the first cloning does not work, something is really wrong
# (since apriori the source and target are exactly the same structure!)
raise Exception("Something is really wrong!")
if cloner.NeedConversion():
localtree = tree.GetTree()
tentries = localtree.GetEntries()
for ii in range(tentries):
if localtree.GetEntry(ii) <= 0:
break
to.Fill()
if to.GetTreeIndex():
to.GetTreeIndex().Append(tree.GetTree().GetTreeIndex(),
kTRUE)
else:
print("WARNING: %s" % str(cloner.GetWarning()))
if tree.GetDirectory() and tree.GetDirectory().GetFile():
print("WARNING: Skipped file %s" %
tree.GetDirectory().GetFile().GetName())
else:
print("WARNING: Skipped file number %i" %
tree.GetTreeNumber())
# loop increment
i += tree.GetTree().GetEntries()
if to.GetTreeIndex():
to.GetTreeIndex().Append(0, kFALSE)
# Force the sorting
nbytes = to.GetTotBytes() - totbytes
return nbytes
