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67 lines
1.6 KiB
67 lines
1.6 KiB
// Copyright (c) 2015 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package gtreap provides an in-memory implementation of the
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// KVStore interfaces using the gtreap balanced-binary treap,
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// copy-on-write data structure.
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package gtreap
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import (
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"github.com/blevesearch/upsidedown_store_api"
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"github.com/steveyen/gtreap"
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)
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type Reader struct {
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t *gtreap.Treap
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}
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func (w *Reader) Get(k []byte) (v []byte, err error) {
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var rv []byte
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itm := w.t.Get(&Item{k: k})
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if itm != nil {
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rv = make([]byte, len(itm.(*Item).v))
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copy(rv, itm.(*Item).v)
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return rv, nil
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}
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return nil, nil
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}
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func (r *Reader) MultiGet(keys [][]byte) ([][]byte, error) {
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return store.MultiGet(r, keys)
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}
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func (w *Reader) PrefixIterator(k []byte) store.KVIterator {
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rv := Iterator{
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t: w.t,
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prefix: k,
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}
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rv.restart(&Item{k: k})
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return &rv
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}
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func (w *Reader) RangeIterator(start, end []byte) store.KVIterator {
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rv := Iterator{
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t: w.t,
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start: start,
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end: end,
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}
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rv.restart(&Item{k: start})
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return &rv
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}
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func (w *Reader) Close() error {
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return nil
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}
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