Пример #1
0
// Builds table from src iterator.
func (t *tOps) createFrom(src iterator.Iterator) (f *tFile, n int, err error) {
	w, err := t.create()
	if err != nil {
		return
	}

	defer func() {
		if err != nil {
			w.drop()
		}
	}()

	for src.Next() {
		err = w.append(src.Key(), src.Value())
		if err != nil {
			return
		}
	}
	err = src.Error()
	if err != nil {
		return
	}

	n = w.tw.EntriesLen()
	f, err = w.finish()
	return
}
Пример #2
0
// reads the next node record from the iterator, skipping over other
// database entries.
func nextNode(it iterator.Iterator) *Node {
	for end := false; !end; end = !it.Next() {
		id, field := splitKey(it.Key())
		if field != nodeDBDiscoverRoot {
			continue
		}
		var n Node
		if err := rlp.DecodeBytes(it.Value(), &n); err != nil {
			if glog.V(logger.Warn) {
				glog.Errorf("invalid node %x: %v", id, err)
			}
			continue
		}
		return &n
	}
	return nil
}