mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-11-14 04:05:17 +00:00
89 lines
2.1 KiB
Go
89 lines
2.1 KiB
Go
// Copyright 2019 The LevelDB-Go and Pebble Authors. All rights reserved. Use
|
|
// of this source code is governed by a BSD-style license that can be found in
|
|
// the LICENSE file.
|
|
|
|
package pebble
|
|
|
|
import "github.com/cockroachdb/pebble/internal/base"
|
|
|
|
// internalIterAdapter adapts the new internalIterator interface which returns
|
|
// the key and value from positioning methods (Seek*, First, Last, Next, Prev)
|
|
// to the old interface which returned a boolean corresponding to Valid. Only
|
|
// used by test code.
|
|
type internalIterAdapter struct {
|
|
internalIterator
|
|
key *InternalKey
|
|
val []byte
|
|
err error
|
|
}
|
|
|
|
func newInternalIterAdapter(iter internalIterator) *internalIterAdapter {
|
|
return &internalIterAdapter{
|
|
internalIterator: iter,
|
|
}
|
|
}
|
|
|
|
func (i *internalIterAdapter) update(key *InternalKey, val LazyValue) bool {
|
|
i.key = key
|
|
if v, _, err := val.Value(nil); err != nil {
|
|
i.key = nil
|
|
i.val = nil
|
|
i.err = err
|
|
} else {
|
|
i.val = v
|
|
}
|
|
return i.key != nil
|
|
}
|
|
|
|
func (i *internalIterAdapter) String() string {
|
|
return "internal-iter-adapter"
|
|
}
|
|
|
|
func (i *internalIterAdapter) SeekGE(key []byte, flags base.SeekGEFlags) bool {
|
|
return i.update(i.internalIterator.SeekGE(key, flags))
|
|
}
|
|
|
|
func (i *internalIterAdapter) SeekPrefixGE(prefix, key []byte, flags base.SeekGEFlags) bool {
|
|
return i.update(i.internalIterator.SeekPrefixGE(prefix, key, flags))
|
|
}
|
|
|
|
func (i *internalIterAdapter) SeekLT(key []byte, flags base.SeekLTFlags) bool {
|
|
return i.update(i.internalIterator.SeekLT(key, flags))
|
|
}
|
|
|
|
func (i *internalIterAdapter) First() bool {
|
|
return i.update(i.internalIterator.First())
|
|
}
|
|
|
|
func (i *internalIterAdapter) Last() bool {
|
|
return i.update(i.internalIterator.Last())
|
|
}
|
|
|
|
func (i *internalIterAdapter) Next() bool {
|
|
return i.update(i.internalIterator.Next())
|
|
}
|
|
|
|
func (i *internalIterAdapter) Prev() bool {
|
|
return i.update(i.internalIterator.Prev())
|
|
}
|
|
|
|
func (i *internalIterAdapter) Key() *InternalKey {
|
|
return i.key
|
|
}
|
|
|
|
func (i *internalIterAdapter) Value() []byte {
|
|
return i.val
|
|
}
|
|
|
|
func (i *internalIterAdapter) Valid() bool {
|
|
return i.key != nil
|
|
}
|
|
|
|
func (i *internalIterAdapter) Error() error {
|
|
err := i.internalIterator.Error()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return i.err
|
|
}
|