forked from gitea/gitea
30 lines
913 B
Go
30 lines
913 B
Go
|
// Copyright 2015 PingCAP, Inc.
|
||
|
|
//
|
||
|
|
// 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 "github.com/juju/errors"
|
||
|
|
|
||
|
|
// NextUntil applies FnKeyCmp to each entry of the iterator until meets some condition.
|
||
|
|
// It will stop when fn returns true, or iterator is invalid or an error occurs.
|
||
|
|
func NextUntil(it Iterator, fn FnKeyCmp) error {
|
||
|
|
var err error
|
||
|
|
for it.Valid() && !fn(it.Key()) {
|
||
|
|
err = it.Next()
|
||
|
|
if err != nil {
|
||
|
|
return errors.Trace(err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|