mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-31 00:27:47 +02:00
* Dropped unused codekit config * Integrated dynamic and static bindata for public * Ignore public bindata * Add a general generate make task * Integrated flexible public assets into web command * Updated vendoring, added all missiong govendor deps * Made the linter happy with the bindata and dynamic code * Moved public bindata definition to modules directory * Ignoring the new bindata path now * Updated to the new public modules import path * Updated public bindata command and drop the new prefix
143 lines
3.0 KiB
Go
143 lines
3.0 KiB
Go
// Copyright 2015 PingCAP, Inc.
|
|
//
|
|
// Copyright 2015 Wenbin Xiao
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package kv
|
|
|
|
import (
|
|
"io"
|
|
|
|
"github.com/juju/errors"
|
|
"github.com/pingcap/tidb/kv/memkv"
|
|
"github.com/pingcap/tidb/terror"
|
|
"github.com/pingcap/tidb/util/types"
|
|
)
|
|
|
|
type btreeBuffer struct {
|
|
tree *memkv.Tree
|
|
}
|
|
|
|
// NewBTreeBuffer returns a breeBuffer.
|
|
func NewBTreeBuffer() MemBuffer {
|
|
return &btreeBuffer{
|
|
tree: memkv.NewTree(types.Collators[true]),
|
|
}
|
|
}
|
|
|
|
// Get returns the value associated with the key; ErrNotExist error if the key does not exist.
|
|
func (b *btreeBuffer) Get(k Key) ([]byte, error) {
|
|
v, ok := b.tree.Get(toIfaces(k))
|
|
if !ok {
|
|
return nil, ErrNotExist
|
|
}
|
|
return fromIfaces(v), nil
|
|
}
|
|
|
|
// Set associates the key with the value.
|
|
func (b *btreeBuffer) Set(k Key, v []byte) error {
|
|
if len(v) == 0 {
|
|
return errors.Trace(ErrCannotSetNilValue)
|
|
}
|
|
b.tree.Set(toIfaces(k), toIfaces(v))
|
|
return nil
|
|
}
|
|
|
|
// Delete removes the entry from buffer with provided key.
|
|
func (b *btreeBuffer) Delete(k Key) error {
|
|
b.tree.Set(toIfaces(k), nil)
|
|
return nil
|
|
}
|
|
|
|
// Release clear the whole buffer.
|
|
func (b *btreeBuffer) Release() {
|
|
b.tree.Clear()
|
|
}
|
|
|
|
type btreeIter struct {
|
|
e *memkv.Enumerator
|
|
k Key
|
|
v []byte
|
|
ok bool
|
|
}
|
|
|
|
// Seek creates a new Iterator based on the provided key.
|
|
func (b *btreeBuffer) Seek(k Key) (Iterator, error) {
|
|
var e *memkv.Enumerator
|
|
var err error
|
|
if k == nil {
|
|
e, err = b.tree.SeekFirst()
|
|
if err != nil {
|
|
if terror.ErrorEqual(err, io.EOF) {
|
|
return &btreeIter{ok: false}, nil
|
|
}
|
|
return &btreeIter{ok: false}, errors.Trace(err)
|
|
}
|
|
} else {
|
|
key := toIfaces([]byte(k))
|
|
e, _ = b.tree.Seek(key)
|
|
}
|
|
iter := &btreeIter{e: e}
|
|
// the initial push...
|
|
err = iter.Next()
|
|
if err != nil {
|
|
return &btreeIter{ok: false}, errors.Trace(err)
|
|
}
|
|
return iter, nil
|
|
}
|
|
|
|
// Close implements Iterator Close.
|
|
func (i *btreeIter) Close() {
|
|
//noop
|
|
}
|
|
|
|
// Key implements Iterator Key.
|
|
func (i *btreeIter) Key() Key {
|
|
return i.k
|
|
}
|
|
|
|
// Value implements Iterator Value.
|
|
func (i *btreeIter) Value() []byte {
|
|
return i.v
|
|
}
|
|
|
|
// Next implements Iterator Next.
|
|
func (i *btreeIter) Next() error {
|
|
k, v, err := i.e.Next()
|
|
if err != nil {
|
|
i.ok = false
|
|
if terror.ErrorEqual(err, io.EOF) {
|
|
return nil
|
|
}
|
|
return errors.Trace(err)
|
|
}
|
|
i.k, i.v, i.ok = fromIfaces(k), fromIfaces(v), true
|
|
return nil
|
|
}
|
|
|
|
// Valid implements Iterator Valid.
|
|
func (i *btreeIter) Valid() bool {
|
|
return i.ok
|
|
}
|
|
|
|
func toIfaces(v []byte) []interface{} {
|
|
return []interface{}{v}
|
|
}
|
|
|
|
func fromIfaces(v []interface{}) []byte {
|
|
if v == nil {
|
|
return nil
|
|
}
|
|
return v[0].([]byte)
|
|
}
|