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size.go
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size.go
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// Copyright 2017 TiKV Project Authors.
//
// 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 typeutil
import (
"strconv"
"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
}