524 lines
12 KiB
Go
524 lines
12 KiB
Go
// 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
|
|
|
|
package main
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"log"
|
|
"net/http"
|
|
"sort"
|
|
"strings"
|
|
"unicode/utf8"
|
|
|
|
"golang.org/x/text/encoding"
|
|
"golang.org/x/text/internal/gen"
|
|
)
|
|
|
|
const ascii = "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f" +
|
|
"\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" +
|
|
` !"#$%&'()*+,-./0123456789:;<=>?` +
|
|
`@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_` +
|
|
"`abcdefghijklmnopqrstuvwxyz{|}~\u007f"
|
|
|
|
var encodings = []struct {
|
|
name string
|
|
mib string
|
|
comment string
|
|
varName string
|
|
replacement byte
|
|
mapping string
|
|
}{
|
|
{
|
|
"IBM Code Page 437",
|
|
"PC8CodePage437",
|
|
"",
|
|
"CodePage437",
|
|
encoding.ASCIISub,
|
|
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM437-2.1.2.ucm",
|
|
},
|
|
{
|
|
"IBM Code Page 850",
|
|
"PC850Multilingual",
|
|
"",
|
|
"CodePage850",
|
|
encoding.ASCIISub,
|
|
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM850-2.1.2.ucm",
|
|
},
|
|
{
|
|
"IBM Code Page 852",
|
|
"PCp852",
|
|
"",
|
|
"CodePage852",
|
|
encoding.ASCIISub,
|
|
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM852-2.1.2.ucm",
|
|
},
|
|
{
|
|
"IBM Code Page 855",
|
|
"IBM855",
|
|
"",
|
|
"CodePage855",
|
|
encoding.ASCIISub,
|
|
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM855-2.1.2.ucm",
|
|
},
|
|
{
|
|
"Windows Code Page 858", // PC latin1 with Euro
|
|
"IBM00858",
|
|
"",
|
|
"CodePage858",
|
|
encoding.ASCIISub,
|
|
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/windows-858-2000.ucm",
|
|
},
|
|
{
|
|
"IBM Code Page 860",
|
|
"IBM860",
|
|
"",
|
|
"CodePage860",
|
|
encoding.ASCIISub,
|
|
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM860-2.1.2.ucm",
|
|
},
|
|
{
|
|
"IBM Code Page 862",
|
|
"PC862LatinHebrew",
|
|
"",
|
|
"CodePage862",
|
|
encoding.ASCIISub,
|
|
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM862-2.1.2.ucm",
|
|
},
|
|
{
|
|
"IBM Code Page 863",
|
|
"IBM863",
|
|
"",
|
|
"CodePage863",
|
|
encoding.ASCIISub,
|
|
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM863-2.1.2.ucm",
|
|
},
|
|
{
|
|
"IBM Code Page 865",
|
|
"IBM865",
|
|
"",
|
|
"CodePage865",
|
|
encoding.ASCIISub,
|
|
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM865-2.1.2.ucm",
|
|
},
|
|
{
|
|
"IBM Code Page 866",
|
|
"IBM866",
|
|
"",
|
|
"CodePage866",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-ibm866.txt",
|
|
},
|
|
{
|
|
"ISO 8859-1",
|
|
"ISOLatin1",
|
|
"",
|
|
"ISO8859_1",
|
|
encoding.ASCIISub,
|
|
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/iso-8859_1-1998.ucm",
|
|
},
|
|
{
|
|
"ISO 8859-2",
|
|
"ISOLatin2",
|
|
"",
|
|
"ISO8859_2",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-2.txt",
|
|
},
|
|
{
|
|
"ISO 8859-3",
|
|
"ISOLatin3",
|
|
"",
|
|
"ISO8859_3",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-3.txt",
|
|
},
|
|
{
|
|
"ISO 8859-4",
|
|
"ISOLatin4",
|
|
"",
|
|
"ISO8859_4",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-4.txt",
|
|
},
|
|
{
|
|
"ISO 8859-5",
|
|
"ISOLatinCyrillic",
|
|
"",
|
|
"ISO8859_5",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-5.txt",
|
|
},
|
|
{
|
|
"ISO 8859-6",
|
|
"ISOLatinArabic",
|
|
"",
|
|
"ISO8859_6,ISO8859_6E,ISO8859_6I",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-6.txt",
|
|
},
|
|
{
|
|
"ISO 8859-7",
|
|
"ISOLatinGreek",
|
|
"",
|
|
"ISO8859_7",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-7.txt",
|
|
},
|
|
{
|
|
"ISO 8859-8",
|
|
"ISOLatinHebrew",
|
|
"",
|
|
"ISO8859_8,ISO8859_8E,ISO8859_8I",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-8.txt",
|
|
},
|
|
{
|
|
"ISO 8859-10",
|
|
"ISOLatin6",
|
|
"",
|
|
"ISO8859_10",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-10.txt",
|
|
},
|
|
{
|
|
"ISO 8859-13",
|
|
"ISO885913",
|
|
"",
|
|
"ISO8859_13",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-13.txt",
|
|
},
|
|
{
|
|
"ISO 8859-14",
|
|
"ISO885914",
|
|
"",
|
|
"ISO8859_14",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-14.txt",
|
|
},
|
|
{
|
|
"ISO 8859-15",
|
|
"ISO885915",
|
|
"",
|
|
"ISO8859_15",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-15.txt",
|
|
},
|
|
{
|
|
"ISO 8859-16",
|
|
"ISO885916",
|
|
"",
|
|
"ISO8859_16",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-iso-8859-16.txt",
|
|
},
|
|
{
|
|
"KOI8-R",
|
|
"KOI8R",
|
|
"",
|
|
"KOI8R",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-koi8-r.txt",
|
|
},
|
|
{
|
|
"KOI8-U",
|
|
"KOI8U",
|
|
"",
|
|
"KOI8U",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-koi8-u.txt",
|
|
},
|
|
{
|
|
"Macintosh",
|
|
"Macintosh",
|
|
"",
|
|
"Macintosh",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-macintosh.txt",
|
|
},
|
|
{
|
|
"Macintosh Cyrillic",
|
|
"MacintoshCyrillic",
|
|
"",
|
|
"MacintoshCyrillic",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-x-mac-cyrillic.txt",
|
|
},
|
|
{
|
|
"Windows 874",
|
|
"Windows874",
|
|
"",
|
|
"Windows874",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-windows-874.txt",
|
|
},
|
|
{
|
|
"Windows 1250",
|
|
"Windows1250",
|
|
"",
|
|
"Windows1250",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-windows-1250.txt",
|
|
},
|
|
{
|
|
"Windows 1251",
|
|
"Windows1251",
|
|
"",
|
|
"Windows1251",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-windows-1251.txt",
|
|
},
|
|
{
|
|
"Windows 1252",
|
|
"Windows1252",
|
|
"",
|
|
"Windows1252",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-windows-1252.txt",
|
|
},
|
|
{
|
|
"Windows 1253",
|
|
"Windows1253",
|
|
"",
|
|
"Windows1253",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-windows-1253.txt",
|
|
},
|
|
{
|
|
"Windows 1254",
|
|
"Windows1254",
|
|
"",
|
|
"Windows1254",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-windows-1254.txt",
|
|
},
|
|
{
|
|
"Windows 1255",
|
|
"Windows1255",
|
|
"",
|
|
"Windows1255",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-windows-1255.txt",
|
|
},
|
|
{
|
|
"Windows 1256",
|
|
"Windows1256",
|
|
"",
|
|
"Windows1256",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-windows-1256.txt",
|
|
},
|
|
{
|
|
"Windows 1257",
|
|
"Windows1257",
|
|
"",
|
|
"Windows1257",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-windows-1257.txt",
|
|
},
|
|
{
|
|
"Windows 1258",
|
|
"Windows1258",
|
|
"",
|
|
"Windows1258",
|
|
encoding.ASCIISub,
|
|
"http://encoding.spec.whatwg.org/index-windows-1258.txt",
|
|
},
|
|
{
|
|
"X-User-Defined",
|
|
"XUserDefined",
|
|
"It is defined at http://encoding.spec.whatwg.org/#x-user-defined",
|
|
"XUserDefined",
|
|
encoding.ASCIISub,
|
|
ascii +
|
|
"\uf780\uf781\uf782\uf783\uf784\uf785\uf786\uf787" +
|
|
"\uf788\uf789\uf78a\uf78b\uf78c\uf78d\uf78e\uf78f" +
|
|
"\uf790\uf791\uf792\uf793\uf794\uf795\uf796\uf797" +
|
|
"\uf798\uf799\uf79a\uf79b\uf79c\uf79d\uf79e\uf79f" +
|
|
"\uf7a0\uf7a1\uf7a2\uf7a3\uf7a4\uf7a5\uf7a6\uf7a7" +
|
|
"\uf7a8\uf7a9\uf7aa\uf7ab\uf7ac\uf7ad\uf7ae\uf7af" +
|
|
"\uf7b0\uf7b1\uf7b2\uf7b3\uf7b4\uf7b5\uf7b6\uf7b7" +
|
|
"\uf7b8\uf7b9\uf7ba\uf7bb\uf7bc\uf7bd\uf7be\uf7bf" +
|
|
"\uf7c0\uf7c1\uf7c2\uf7c3\uf7c4\uf7c5\uf7c6\uf7c7" +
|
|
"\uf7c8\uf7c9\uf7ca\uf7cb\uf7cc\uf7cd\uf7ce\uf7cf" +
|
|
"\uf7d0\uf7d1\uf7d2\uf7d3\uf7d4\uf7d5\uf7d6\uf7d7" +
|
|
"\uf7d8\uf7d9\uf7da\uf7db\uf7dc\uf7dd\uf7de\uf7df" +
|
|
"\uf7e0\uf7e1\uf7e2\uf7e3\uf7e4\uf7e5\uf7e6\uf7e7" +
|
|
"\uf7e8\uf7e9\uf7ea\uf7eb\uf7ec\uf7ed\uf7ee\uf7ef" +
|
|
"\uf7f0\uf7f1\uf7f2\uf7f3\uf7f4\uf7f5\uf7f6\uf7f7" +
|
|
"\uf7f8\uf7f9\uf7fa\uf7fb\uf7fc\uf7fd\uf7fe\uf7ff",
|
|
},
|
|
}
|
|
|
|
func getWHATWG(url string) string {
|
|
res, err := http.Get(url)
|
|
if err != nil {
|
|
log.Fatalf("%q: Get: %v", url, err)
|
|
}
|
|
defer res.Body.Close()
|
|
|
|
mapping := make([]rune, 128)
|
|
for i := range mapping {
|
|
mapping[i] = '\ufffd'
|
|
}
|
|
|
|
scanner := bufio.NewScanner(res.Body)
|
|
for scanner.Scan() {
|
|
s := strings.TrimSpace(scanner.Text())
|
|
if s == "" || s[0] == '#' {
|
|
continue
|
|
}
|
|
x, y := 0, 0
|
|
if _, err := fmt.Sscanf(s, "%d\t0x%x", &x, &y); err != nil {
|
|
log.Fatalf("could not parse %q", s)
|
|
}
|
|
if x < 0 || 128 <= x {
|
|
log.Fatalf("code %d is out of range", x)
|
|
}
|
|
if 0x80 <= y && y < 0xa0 {
|
|
// We diverge from the WHATWG spec by mapping control characters
|
|
// in the range [0x80, 0xa0) to U+FFFD.
|
|
continue
|
|
}
|
|
mapping[x] = rune(y)
|
|
}
|
|
return ascii + string(mapping)
|
|
}
|
|
|
|
func getUCM(url string) string {
|
|
res, err := http.Get(url)
|
|
if err != nil {
|
|
log.Fatalf("%q: Get: %v", url, err)
|
|
}
|
|
defer res.Body.Close()
|
|
|
|
mapping := make([]rune, 256)
|
|
for i := range mapping {
|
|
mapping[i] = '\ufffd'
|
|
}
|
|
|
|
charsFound := 0
|
|
scanner := bufio.NewScanner(res.Body)
|
|
for scanner.Scan() {
|
|
s := strings.TrimSpace(scanner.Text())
|
|
if s == "" || s[0] == '#' {
|
|
continue
|
|
}
|
|
var c byte
|
|
var r rune
|
|
if _, err := fmt.Sscanf(s, `<U%x> \x%x |0`, &r, &c); err != nil {
|
|
continue
|
|
}
|
|
mapping[c] = r
|
|
charsFound++
|
|
}
|
|
|
|
if charsFound < 200 {
|
|
log.Fatalf("%q: only %d characters found (wrong page format?)", url, charsFound)
|
|
}
|
|
|
|
return string(mapping)
|
|
}
|
|
|
|
func main() {
|
|
mibs := map[string]bool{}
|
|
all := []string{}
|
|
|
|
w := gen.NewCodeWriter()
|
|
defer w.WriteGoFile("tables.go", "charmap")
|
|
|
|
printf := func(s string, a ...interface{}) { fmt.Fprintf(w, s, a...) }
|
|
|
|
printf("import (\n")
|
|
printf("\t\"golang.org/x/text/encoding\"\n")
|
|
printf("\t\"golang.org/x/text/encoding/internal/identifier\"\n")
|
|
printf(")\n\n")
|
|
for _, e := range encodings {
|
|
varNames := strings.Split(e.varName, ",")
|
|
all = append(all, varNames...)
|
|
varName := varNames[0]
|
|
switch {
|
|
case strings.HasPrefix(e.mapping, "http://encoding.spec.whatwg.org/"):
|
|
e.mapping = getWHATWG(e.mapping)
|
|
case strings.HasPrefix(e.mapping, "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/"):
|
|
e.mapping = getUCM(e.mapping)
|
|
}
|
|
|
|
asciiSuperset, low := strings.HasPrefix(e.mapping, ascii), 0x00
|
|
if asciiSuperset {
|
|
low = 0x80
|
|
}
|
|
lvn := 1
|
|
if strings.HasPrefix(varName, "ISO") || strings.HasPrefix(varName, "KOI") {
|
|
lvn = 3
|
|
}
|
|
lowerVarName := strings.ToLower(varName[:lvn]) + varName[lvn:]
|
|
printf("// %s is the %s encoding.\n", varName, e.name)
|
|
if e.comment != "" {
|
|
printf("//\n// %s\n", e.comment)
|
|
}
|
|
printf("var %s encoding.Encoding = &%s\n\nvar %s = charmap{\nname: %q,\n",
|
|
varName, lowerVarName, lowerVarName, e.name)
|
|
if mibs[e.mib] {
|
|
log.Fatalf("MIB type %q declared multiple times.", e.mib)
|
|
}
|
|
printf("mib: identifier.%s,\n", e.mib)
|
|
printf("asciiSuperset: %t,\n", asciiSuperset)
|
|
printf("low: 0x%02x,\n", low)
|
|
printf("replacement: 0x%02x,\n", e.replacement)
|
|
|
|
printf("decode: [256]utf8Enc{\n")
|
|
i, backMapping := 0, map[rune]byte{}
|
|
for _, c := range e.mapping {
|
|
if _, ok := backMapping[c]; !ok && c != utf8.RuneError {
|
|
backMapping[c] = byte(i)
|
|
}
|
|
var buf [8]byte
|
|
n := utf8.EncodeRune(buf[:], c)
|
|
if n > 3 {
|
|
panic(fmt.Sprintf("rune %q (%U) is too long", c, c))
|
|
}
|
|
printf("{%d,[3]byte{0x%02x,0x%02x,0x%02x}},", n, buf[0], buf[1], buf[2])
|
|
if i%2 == 1 {
|
|
printf("\n")
|
|
}
|
|
i++
|
|
}
|
|
printf("},\n")
|
|
|
|
printf("encode: [256]uint32{\n")
|
|
encode := make([]uint32, 0, 256)
|
|
for c, i := range backMapping {
|
|
encode = append(encode, uint32(i)<<24|uint32(c))
|
|
}
|
|
sort.Sort(byRune(encode))
|
|
for len(encode) < cap(encode) {
|
|
encode = append(encode, encode[len(encode)-1])
|
|
}
|
|
for i, enc := range encode {
|
|
printf("0x%08x,", enc)
|
|
if i%8 == 7 {
|
|
printf("\n")
|
|
}
|
|
}
|
|
printf("},\n}\n")
|
|
|
|
// Add an estimate of the size of a single charmap{} struct value, which
|
|
// includes two 256 elem arrays of 4 bytes and some extra fields, which
|
|
// align to 3 uint64s on 64-bit architectures.
|
|
w.Size += 2*4*256 + 3*8
|
|
}
|
|
// TODO: add proper line breaking.
|
|
printf("var listAll = []encoding.Encoding{\n%s,\n}\n\n", strings.Join(all, ",\n"))
|
|
}
|
|
|
|
type byRune []uint32
|
|
|
|
func (b byRune) Len() int { return len(b) }
|
|
func (b byRune) Less(i, j int) bool { return b[i]&0xffffff < b[j]&0xffffff }
|
|
func (b byRune) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
|