forked from mystiq/dex
112 lines
2.8 KiB
Go
112 lines
2.8 KiB
Go
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// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build ignore
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package main
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// Download https://encoding.spec.whatwg.org/encodings.json and use it to
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// generate table.go.
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import (
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"strings"
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)
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type enc struct {
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Name string
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Labels []string
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}
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type group struct {
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Encodings []enc
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Heading string
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}
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const specURL = "https://encoding.spec.whatwg.org/encodings.json"
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func main() {
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resp, err := http.Get(specURL)
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if err != nil {
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log.Fatalf("error fetching %s: %s", specURL, err)
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}
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if resp.StatusCode != 200 {
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log.Fatalf("error fetching %s: HTTP status %s", specURL, resp.Status)
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}
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defer resp.Body.Close()
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var groups []group
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d := json.NewDecoder(resp.Body)
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err = d.Decode(&groups)
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if err != nil {
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log.Fatalf("error reading encodings.json: %s", err)
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}
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fmt.Println("// generated by go run gen.go; DO NOT EDIT")
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fmt.Println()
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fmt.Println("package charset")
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fmt.Println()
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fmt.Println("import (")
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fmt.Println(`"golang.org/x/text/encoding"`)
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for _, pkg := range []string{"charmap", "japanese", "korean", "simplifiedchinese", "traditionalchinese", "unicode"} {
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fmt.Printf("\"golang.org/x/text/encoding/%s\"\n", pkg)
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}
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fmt.Println(")")
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fmt.Println()
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fmt.Println("var encodings = map[string]struct{e encoding.Encoding; name string} {")
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for _, g := range groups {
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for _, e := range g.Encodings {
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goName, ok := miscNames[e.Name]
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if !ok {
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for k, v := range prefixes {
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if strings.HasPrefix(e.Name, k) {
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goName = v + e.Name[len(k):]
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break
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}
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}
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if goName == "" {
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log.Fatalf("unrecognized encoding name: %s", e.Name)
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}
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}
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for _, label := range e.Labels {
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fmt.Printf("%q: {%s, %q},\n", label, goName, e.Name)
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}
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}
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}
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fmt.Println("}")
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}
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var prefixes = map[string]string{
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"iso-8859-": "charmap.ISO8859_",
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"windows-": "charmap.Windows",
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}
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var miscNames = map[string]string{
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"utf-8": "encoding.Nop",
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"ibm866": "charmap.CodePage866",
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"iso-8859-8-i": "charmap.ISO8859_8",
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"koi8-r": "charmap.KOI8R",
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"koi8-u": "charmap.KOI8U",
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"macintosh": "charmap.Macintosh",
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"x-mac-cyrillic": "charmap.MacintoshCyrillic",
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"gbk": "simplifiedchinese.GBK",
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"gb18030": "simplifiedchinese.GB18030",
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"hz-gb-2312": "simplifiedchinese.HZGB2312",
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"big5": "traditionalchinese.Big5",
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"euc-jp": "japanese.EUCJP",
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"iso-2022-jp": "japanese.ISO2022JP",
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"shift_jis": "japanese.ShiftJIS",
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"euc-kr": "korean.EUCKR",
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"replacement": "encoding.Replacement",
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"utf-16be": "unicode.UTF16(unicode.BigEndian, unicode.IgnoreBOM)",
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"utf-16le": "unicode.UTF16(unicode.LittleEndian, unicode.IgnoreBOM)",
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"x-user-defined": "charmap.XUserDefined",
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}
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