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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| // 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 logutil | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/hex" | ||
| "fmt" | ||
| "io" | ||
| "reflect" | ||
| "strings" | ||
|
|
||
| "github.com/golang/protobuf/proto" | ||
| ) | ||
|
|
||
| // Hex defines a fmt.Stringer for proto.Message. | ||
| // We can't define the String() method on proto.Message, but we can wrap it. | ||
| func Hex(msg proto.Message) fmt.Stringer { | ||
| return hexStringer{msg} | ||
| } | ||
|
|
||
| type hexStringer struct { | ||
| proto.Message | ||
| } | ||
|
|
||
| func (h hexStringer) String() string { | ||
| val := reflect.ValueOf(h.Message) | ||
| var w bytes.Buffer | ||
| prettyPrint(&w, val) | ||
| return w.String() | ||
| } | ||
|
|
||
| func prettyPrint(w io.Writer, val reflect.Value) { | ||
| tp := val.Type() | ||
| switch val.Kind() { | ||
| case reflect.Slice: | ||
| elemType := tp.Elem() | ||
| if elemType.Kind() == reflect.Uint8 { | ||
| fmt.Fprintf(w, "%s", hex.EncodeToString(val.Bytes())) | ||
| } else { | ||
| fmt.Fprintf(w, "%s", val.Interface()) | ||
| } | ||
| case reflect.Struct: | ||
| fmt.Fprintf(w, "{") | ||
| for i := 0; i < val.NumField(); i++ { | ||
| fv := val.Field(i) | ||
| ft := tp.Field(i) | ||
| if strings.HasPrefix(ft.Name, "XXX_") { | ||
| continue | ||
| } | ||
| if i != 0 { | ||
| fmt.Fprintf(w, " ") | ||
| } | ||
| fmt.Fprintf(w, "%s:", ft.Name) | ||
| prettyPrint(w, fv) | ||
| } | ||
| fmt.Fprintf(w, "}") | ||
| case reflect.Ptr: | ||
| if val.IsNil() { | ||
| fmt.Fprintf(w, "%v", val.Interface()) | ||
| } else { | ||
| prettyPrint(w, reflect.Indirect(val)) | ||
| } | ||
| default: | ||
| fmt.Fprintf(w, "%v", val.Interface()) | ||
| } | ||
| } |
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