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
}