| // Copyright 2013 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // +build ignore |
| |
| // |
| // usage: |
| // |
| // go run genzabbrs.go -output zoneinfo_abbrs_windows.go |
| // |
| |
| package main |
| |
| import ( |
| "bytes" |
| "encoding/xml" |
| "flag" |
| "go/format" |
| "io/ioutil" |
| "log" |
| "net/http" |
| "sort" |
| "text/template" |
| "time" |
| ) |
| |
| var filename = flag.String("output", "zoneinfo_abbrs_windows.go", "output file name") |
| |
| // getAbbrs finds timezone abbreviations (standard and daylight saving time) |
| // for location l. |
| func getAbbrs(l *time.Location) (st, dt string) { |
| t := time.Date(time.Now().Year(), 0, 1, 0, 0, 0, 0, l) |
| abbr1, off1 := t.Zone() |
| for i := 0; i < 12; i++ { |
| t = t.AddDate(0, 1, 0) |
| abbr2, off2 := t.Zone() |
| if abbr1 != abbr2 { |
| if off2-off1 < 0 { // southern hemisphere |
| abbr1, abbr2 = abbr2, abbr1 |
| } |
| return abbr1, abbr2 |
| } |
| } |
| return abbr1, abbr1 |
| } |
| |
| type zone struct { |
| WinName string |
| UnixName string |
| StTime string |
| DSTime string |
| } |
| |
| type zones []*zone |
| |
| func (zs zones) Len() int { return len(zs) } |
| func (zs zones) Swap(i, j int) { zs[i], zs[j] = zs[j], zs[i] } |
| func (zs zones) Less(i, j int) bool { return zs[i].UnixName < zs[j].UnixName } |
| |
| const wzURL = "http://unicode.org/cldr/data/common/supplemental/windowsZones.xml" |
| |
| type MapZone struct { |
| Other string `xml:"other,attr"` |
| Territory string `xml:"territory,attr"` |
| Type string `xml:"type,attr"` |
| } |
| |
| type SupplementalData struct { |
| Zones []MapZone `xml:"windowsZones>mapTimezones>mapZone"` |
| } |
| |
| func readWindowsZones() (zones, error) { |
| r, err := http.Get(wzURL) |
| if err != nil { |
| return nil, err |
| } |
| defer r.Body.Close() |
| |
| data, err := ioutil.ReadAll(r.Body) |
| if err != nil { |
| return nil, err |
| } |
| |
| var sd SupplementalData |
| err = xml.Unmarshal(data, &sd) |
| if err != nil { |
| return nil, err |
| } |
| zs := make(zones, 0) |
| for _, z := range sd.Zones { |
| if z.Territory != "001" { |
| // to avoid dups. I don't know why. |
| continue |
| } |
| l, err := time.LoadLocation(z.Type) |
| if err != nil { |
| return nil, err |
| } |
| st, dt := getAbbrs(l) |
| zs = append(zs, &zone{ |
| WinName: z.Other, |
| UnixName: z.Type, |
| StTime: st, |
| DSTime: dt, |
| }) |
| } |
| return zs, nil |
| } |
| |
| func main() { |
| flag.Parse() |
| zs, err := readWindowsZones() |
| if err != nil { |
| log.Fatal(err) |
| } |
| sort.Sort(zs) |
| var v = struct { |
| URL string |
| Zs zones |
| }{ |
| wzURL, |
| zs, |
| } |
| var buf bytes.Buffer |
| err = template.Must(template.New("prog").Parse(prog)).Execute(&buf, v) |
| if err != nil { |
| log.Fatal(err) |
| } |
| data, err := format.Source(buf.Bytes()) |
| if err != nil { |
| log.Fatal(err) |
| } |
| err = ioutil.WriteFile(*filename, data, 0644) |
| if err != nil { |
| log.Fatal(err) |
| } |
| } |
| |
| const prog = ` |
| // Copyright 2013 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // Code generated by genzabbrs.go; DO NOT EDIT. |
| // Based on information from {{.URL}} |
| |
| package time |
| |
| type abbr struct { |
| std string |
| dst string |
| } |
| |
| var abbrs = map[string]abbr{ |
| {{range .Zs}} "{{.WinName}}": {"{{.StTime}}", "{{.DSTime}}"}, // {{.UnixName}} |
| {{end}}} |
| |
| ` |