mirror of
https://github.com/fatedier/frp.git
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113 lines
2.2 KiB
Go
113 lines
2.2 KiB
Go
// Copyright 2019 fatedier, fatedier@gmail.com
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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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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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 config
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import (
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"encoding/json"
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"errors"
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"strconv"
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"strings"
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)
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const (
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MB = 1024 * 1024
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KB = 1024
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)
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type BandwidthQuantity struct {
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s string // MB or KB
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i int64 // bytes
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}
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func NewBandwidthQuantity(s string) (BandwidthQuantity, error) {
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q := BandwidthQuantity{}
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err := q.UnmarshalString(s)
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if err != nil {
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return q, err
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}
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return q, nil
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}
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func (q *BandwidthQuantity) Equal(u *BandwidthQuantity) bool {
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if q == nil && u == nil {
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return true
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}
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if q != nil && u != nil {
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return q.i == u.i
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}
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return false
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}
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func (q *BandwidthQuantity) String() string {
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return q.s
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}
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func (q *BandwidthQuantity) UnmarshalString(s string) error {
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s = strings.TrimSpace(s)
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if s == "" {
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return nil
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}
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var (
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base int64
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f float64
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err error
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)
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if strings.HasSuffix(s, "MB") {
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base = MB
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fstr := strings.TrimSuffix(s, "MB")
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f, err = strconv.ParseFloat(fstr, 64)
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if err != nil {
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return err
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}
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} else if strings.HasSuffix(s, "KB") {
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base = KB
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fstr := strings.TrimSuffix(s, "KB")
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f, err = strconv.ParseFloat(fstr, 64)
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if err != nil {
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return err
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}
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} else {
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return errors.New("unit not support")
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}
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q.s = s
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q.i = int64(f * float64(base))
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return nil
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}
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func (q *BandwidthQuantity) UnmarshalJSON(b []byte) error {
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if len(b) == 4 && string(b) == "null" {
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return nil
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}
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var str string
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err := json.Unmarshal(b, &str)
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if err != nil {
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return err
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}
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return q.UnmarshalString(str)
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}
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func (q *BandwidthQuantity) MarshalJSON() ([]byte, error) {
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return []byte("\"" + q.s + "\""), nil
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}
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func (q *BandwidthQuantity) Bytes() int64 {
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return q.i
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}
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