func (rt *skipListRT) add(entry rangetree.Entry) rangetree.Entry {
var (
value int64
e common.Comparator
sl = rt.top
db *dimensionalBundle
lb *lastBundle
)
for i := uint64(0); i < rt.dimensions; i++ {
value = entry.ValueAtDimension(i)
e = sl.Get(skipEntry(value))[0]
if isLastDimension(i, rt.dimensions) {
if e != nil { // this is an overwrite
lb = e.(*lastBundle)
oldEntry := lb.entry
lb.entry = entry
return oldEntry
}
// need to add new sl entry
lb = &lastBundle{id: uint64(value), entry: entry}
rt.number++
sl.Insert(lb)
return nil
}
if e == nil { // we need the intermediate dimension
db = &dimensionalBundle{id: uint64(value), sl: skip.New(uint64(0))}
sl.Insert(db)
} else {
db = e.(*dimensionalBundle)
}
sl = db.sl
}
panic(`Ran out of dimensions before for loop completed.`)
}
func newNodes() *nodes {
return &nodes{
list: skip.New(uint64(0)),
}
}
func (rt *skipListRT) init(dimensions uint64) {
rt.dimensions = dimensions
rt.top = skip.New(uint64(0))
}
func newKeys() *keys {
return &keys{
list: skip.New(uint64(0)),
}
}