61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
// Copyright 2021 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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package charset
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import (
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"bytes"
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"golang.org/x/text/encoding"
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)
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// EncodingLatin1Impl is the instance of encodingLatin1.
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// TiDB uses utf8 implementation for latin1 charset because of the backward compatibility.
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var EncodingLatin1Impl = &encodingLatin1{encodingUTF8{encodingBase{enc: encoding.Nop}}}
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func init() {
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EncodingLatin1Impl.self = EncodingLatin1Impl
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}
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// encodingLatin1 compatibles with latin1 in old version TiDB.
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type encodingLatin1 struct {
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encodingUTF8
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}
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// Name implements Encoding interface.
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func (e *encodingLatin1) Name() string {
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return CharsetLatin1
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}
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// Peek implements Encoding interface.
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func (e *encodingLatin1) Peek(src []byte) []byte {
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if len(src) == 0 {
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return src
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}
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return src[:1]
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}
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// IsValid implements Encoding interface.
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func (e *encodingLatin1) IsValid(src []byte) bool {
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return true
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}
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// Tp implements Encoding interface.
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func (e *encodingLatin1) Tp() EncodingTp {
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return EncodingTpLatin1
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}
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func (e *encodingLatin1) Transform(dest *bytes.Buffer, src []byte, op Op) ([]byte, error) {
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return src, nil
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}
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