26dab31068
Signed-off-by: YangKeao <yangkeao@chunibyo.icu> Signed-off-by: YangKeao <yangkeao@chunibyo.icu> Co-authored-by: Weizhen Wang <wangweizhen@pingcap.com> Co-authored-by: Ti Chi Robot <ti-community-prow-bot@tidb.io>
74 lines
1.7 KiB
Go
74 lines
1.7 KiB
Go
// Copyright 2023 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 duration provides a customized duration, which supports unit 'd', 'h' and 'm'
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package duration
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import (
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"strconv"
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"time"
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"unicode"
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"github.com/pingcap/errors"
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)
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func readFloat(s string) (float64, string, error) {
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numbers := ""
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for pos, ch := range s {
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if !unicode.IsDigit(ch) && ch != '.' {
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numbers = s[:pos]
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break
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}
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}
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if len(numbers) > 0 {
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i, err := strconv.ParseFloat(numbers, 64)
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if err != nil {
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return 0, s, err
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}
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return i, s[len(numbers):], nil
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}
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return 0, s, errors.New("fail to read an integer")
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}
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// ParseDuration parses the duration which contains 'd', 'h' and 'm'
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func ParseDuration(s string) (time.Duration, error) {
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duration := time.Duration(0)
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if s == "0" {
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return 0, nil
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}
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var err error
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var i float64
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for len(s) > 0 {
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i, s, err = readFloat(s)
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if err != nil {
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return 0, err
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}
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switch s[0] {
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case 'd':
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duration += time.Duration(i * float64(time.Hour*24))
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case 'h':
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duration += time.Duration(i * float64(time.Hour))
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case 'm':
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duration += time.Duration(i * float64(time.Minute))
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default:
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return 0, errors.Errorf("unknown unit %c", s[0])
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}
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s = s[1:]
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}
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return duration, nil
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}
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