mirror of
https://github.com/etcd-io/etcd.git
synced 2026-02-05 15:46:51 +01:00
53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
// Copyright 2025 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cache
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import "bytes"
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type Prefix string
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func (prefix Prefix) Match(key []byte) bool {
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if prefix == "" {
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return true
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}
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prefixLen := len(prefix)
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return len(key) >= prefixLen && string(key[:prefixLen]) == string(prefix)
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}
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func ExactKey(key []byte) KeyPredicate {
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return func(k []byte) bool { return bytes.Equal(k, key) }
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}
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func FromKey(start []byte) KeyPredicate {
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return func(k []byte) bool { return bytes.Compare(k, start) >= 0 }
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}
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func Range(start, end []byte) KeyPredicate {
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return func(k []byte) bool {
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return bytes.Compare(k, start) >= 0 &&
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bytes.Compare(k, end) < 0
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}
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}
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func KeyPredForRange(start, end []byte) KeyPredicate {
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if len(end) == 0 {
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return ExactKey(start)
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}
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if len(end) == 1 && end[0] == 0 {
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return FromKey(start)
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}
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return Range(start, end)
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}
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