tidb typeutil 代码
文件路径：/store/pdtypes/typeutil.go
/ Copyright 2022 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,
/ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/ See the License for the specific language governing permissions and
/ limitations under the License.
package pdtypes
import (
"fmt"
"strconv"
"strings"
"time"
"github.com/docker/go-units"
"github.com/pingcap/errors"
)
/ ByteSize is a retype uint64 for TOML and JSON.
type ByteSize uint64
/ MarshalJSON returns the size as a JSON string.
func (b ByteSize) MarshalJSON() ([]byte, error) {
return []byte(`"` + units.BytesSize(float64(b)) + `"`), nil
}
/ UnmarshalJSON parses a JSON string into the byte size.
func (b *ByteSize) UnmarshalJSON(text []byte) error {
s, err := strconv.Unquote(string(text))
if err != nil {
return errors.WithStack(err)
}
v, err := units.RAMInBytes(s)
if err != nil {
return errors.WithStack(err)
}
*b = ByteSize(v)
return nil
}
/ UnmarshalText parses a Toml string into the byte size.
func (b *ByteSize) UnmarshalText(text []byte) error {
v, err := units.RAMInBytes(string(text))
if err != nil {
return errors.WithStack(err)
}
*b = ByteSize(v)
return nil
}
/ Duration is a wrapper of time.Duration for TOML and JSON.
type Duration struct {
time.Duration
}
/ NewDuration creates a Duration from time.Duration.
func NewDuration(duration time.Duration) Duration {
return Duration{Duration: duration}
}
/ MarshalJSON returns the duration as a JSON string.
func (d *Duration) MarshalJSON() ([]byte, error) {
return []byte(fmt.Sprintf(`"%s"`, d.String())), nil
}
/ UnmarshalJSON parses a JSON string into the duration.
func (d *Duration) UnmarshalJSON(text []byte) error {
s, err := strconv.Unquote(string(text))
if err != nil {
return errors.WithStack(err)
}
duration, err := time.ParseDuration(s)
if err != nil {
return errors.WithStack(err)
}
d.Duration = duration
return nil
}
/ UnmarshalText parses a TOML string into the duration.
func (d *Duration) UnmarshalText(text []byte) error {
var err error
d.Duration, err = time.ParseDuration(string(text))
return errors.WithStack(err)
}
/ MarshalText returns the duration as a JSON string.
func (d Duration) MarshalText() ([]byte, error) {
return []byte(d.String()), nil
}
/ StringSlice is more friendly to json encode/decode
type StringSlice []string
/ MarshalJSON returns the size as a JSON string.
func (s StringSlice) MarshalJSON() ([]byte, error) {
return []byte(strconv.Quote(strings.Join(s, ","))), nil
}
/ UnmarshalJSON parses a JSON string into the byte size.
func (s *StringSlice) UnmarshalJSON(text []byte) error {
data, err := strconv.Unquote(string(text))
if err != nil {
return errors.WithStack(err)
}
if len(data) == 0 {
*s = []string{}
return nil
}
*s = strings.Split(data, ",")
return nil
}