bf80f4628e
also changed over to mschoch fork of goleveldb (temporary) the change to my fork is pending some read-only issues described here: https://github.com/syndtr/goleveldb/issues/111 hopefully we can find a path forward, and get that addressed upstream
96 lines
2.1 KiB
Go
96 lines
2.1 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed under the
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// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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package goleveldb
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import (
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"github.com/mschoch/goleveldb/leveldb"
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"github.com/mschoch/goleveldb/leveldb/iterator"
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)
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type Iterator struct {
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store *Store
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iterator iterator.Iterator
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copyk []byte
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copyv []byte
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}
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func newIterator(store *Store) *Iterator {
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ropts := defaultReadOptions()
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iter := store.db.NewIterator(nil, ropts)
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rv := Iterator{
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store: store,
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iterator: iter,
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}
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return &rv
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}
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func newIteratorWithSnapshot(store *Store, snapshot *leveldb.Snapshot) *Iterator {
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options := defaultReadOptions()
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iter := snapshot.NewIterator(nil, options)
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rv := Iterator{
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store: store,
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iterator: iter,
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}
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return &rv
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}
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func (ldi *Iterator) SeekFirst() {
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ldi.copyk = nil
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ldi.copyv = nil
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ldi.iterator.First()
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}
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func (ldi *Iterator) Seek(key []byte) {
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ldi.copyk = nil
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ldi.copyv = nil
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ldi.iterator.Seek(key)
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}
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func (ldi *Iterator) Next() {
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ldi.copyk = nil
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ldi.copyv = nil
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ldi.iterator.Next()
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}
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func (ldi *Iterator) Current() ([]byte, []byte, bool) {
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if ldi.Valid() {
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return ldi.Key(), ldi.Value(), true
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}
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return nil, nil, false
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}
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func (ldi *Iterator) Key() []byte {
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k := ldi.iterator.Key()
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if ldi.copyk == nil {
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ldi.copyk = make([]byte, len(k))
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copy(ldi.copyk, k)
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}
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return ldi.copyk
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}
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func (ldi *Iterator) Value() []byte {
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v := ldi.iterator.Value()
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if ldi.copyv == nil {
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ldi.copyv = make([]byte, len(v))
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copy(ldi.copyv, v)
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}
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return ldi.copyv
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}
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func (ldi *Iterator) Valid() bool {
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return ldi.iterator.Valid()
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}
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func (ldi *Iterator) Close() error {
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ldi.copyk = nil
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ldi.copyv = nil
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return nil
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}
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