tidb encoding_bin 源码
tidb encoding_bin 代码
文件路径：/parser/charset/encoding_bin.go
// Copyright 2021 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 charset
import (
"bytes"
"golang.org/x/text/encoding"
)
// EncodingBinImpl is the instance of encodingBin.
var EncodingBinImpl = &encodingBin{encodingBase{enc: encoding.Nop}}
func init() {
EncodingBinImpl.self = EncodingBinImpl
}
// encodingBin is the binary encoding.
type encodingBin struct {
encodingBase
}
// Name implements Encoding interface.
func (*encodingBin) Name() string {
return CharsetBin
}
// Tp implements Encoding interface.
func (*encodingBin) Tp() EncodingTp {
return EncodingTpBin
}
// Peek implements Encoding interface.
func (*encodingBin) Peek(src []byte) []byte {
if len(src) == 0 {
return src
}
return src[:1]
}
// IsValid implements Encoding interface.
func (*encodingBin) IsValid(_ []byte) bool {
return true
}
// Foreach implements Encoding interface.
func (*encodingBin) Foreach(src []byte, _ Op, fn func(from, to []byte, ok bool) bool) {
for i := 0; i < len(src); i++ {
if !fn(src[i:i+1], src[i:i+1], true) {
return
}
}
}
func (*encodingBin) Transform(_ *bytes.Buffer, src []byte, _ Op) ([]byte, error) {
return src, nil
}
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