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etcd
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client/v3/namespace/util.go
42 строки
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Piotr Tabor
clientv3: Move to client/v3 (just file move)
20 окт 2020, 11:08
20 окт 2020, 11:08
8a7f155
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// Copyright 2017 The etcd Authors // // 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, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package namespace func prefixInterval(pfx string, key, end []byte) (pfxKey []byte, pfxEnd []byte) { pfxKey = make([]byte, len(pfx)+len(key)) copy(pfxKey[copy(pfxKey, pfx):], key) if len(end) == 1 && end[0] == 0 { // the edge of the keyspace pfxEnd = make([]byte, len(pfx)) copy(pfxEnd, pfx) ok := false for i := len(pfxEnd) - 1; i >= 0; i-- { if pfxEnd[i]++; pfxEnd[i] != 0 { ok = true break } } if !ok { // 0xff..ff => 0x00 pfxEnd = []byte{0} } } else if len(end) >= 1 { pfxEnd = make([]byte, len(pfx)+len(end)) copy(pfxEnd[copy(pfxEnd, pfx):], end) } return pfxKey, pfxEnd }