57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
// Copyright 2023 PingCAP, Inc.
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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 duplicate
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import (
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"bytes"
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"fmt"
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"github.com/pingcap/tidb/pkg/util/codec"
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)
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type internalKey struct {
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key []byte
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keyID []byte
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}
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func (ikey internalKey) String() string {
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if len(ikey.keyID) == 0 {
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return fmt.Sprintf("%X", ikey.key)
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}
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return fmt.Sprintf("%X@%X", ikey.key, ikey.keyID)
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}
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func compareInternalKey(a, b internalKey) int {
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if cmp := bytes.Compare(a.key, b.key); cmp != 0 {
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return cmp
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}
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return bytes.Compare(a.keyID, b.keyID)
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}
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func encodeInternalKey(appendTo []byte, ikey internalKey) []byte {
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appendTo = codec.EncodeBytes(appendTo, ikey.key)
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return append(appendTo, ikey.keyID...)
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}
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func decodeInternalKey(data []byte, ikey *internalKey) error {
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leftover, key, err := codec.DecodeBytes(data, ikey.key[:0])
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if err != nil {
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return err
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}
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ikey.key = key
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ikey.keyID = append(ikey.keyID[:0], leftover...)
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return nil
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}
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