| // 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 |
| |
| // This program generates tables.go: |
| // go run maketables.go | gofmt > tables.go |
| |
| import ( |
| "bufio" |
| "fmt" |
| "log" |
| "net/http" |
| "sort" |
| "strings" |
| "unicode/utf8" |
| |
| "golang.org/x/text/encoding" |
| ) |
| |
| 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 |
| }{ |
| { |
| "Windows Code Page 437", |
| "PC8CodePage437", |
| "", |
| "CodePage437", |
| '?', |
| "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/windows-437-2000.ucm", |
| }, |
| { |
| "Windows Code Page 850", |
| "PC850Multilingual", |
| "", |
| "CodePage850", |
| '?', |
| "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/windows-850-2000.ucm", |
| }, |
| { |
| "Windows Code Page 852", |
| "PCp852", |
| "", |
| "CodePage852", |
| '?', |
| "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/windows-852-2000.ucm", |
| }, |
| { |
| "Windows Code Page 855", |
| "IBM855", |
| "", |
| "CodePage855", |
| '?', |
| "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/windows-855-2000.ucm", |
| }, |
| { |
| "Windows Code Page 858", |
| "IBM00858", |
| "", |
| "CodePage858", |
| '?', |
| "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/windows-858-2000.ucm", |
| }, |
| { |
| "Windows Code Page 862", |
| "PC862LatinHebrew", |
| "", |
| "CodePage862", |
| '?', |
| "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/windows-862-2000.ucm", |
| }, |
| { |
| "IBM Code Page 866", |
| "IBM866", |
| "", |
| "CodePage866", |
| encoding.ASCIISub, |
| "http://encoding.spec.whatwg.org/index-ibm866.txt", |
| }, |
| { |
| "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{} |
| |
| buf := make([]byte, 8) |
| fmt.Printf("// generated by go run maketables.go; DO NOT EDIT\n\n") |
| fmt.Printf("package charmap\n\n") |
| fmt.Printf("import (\n") |
| fmt.Printf("\t\"golang.org/x/text/encoding\"\n") |
| fmt.Printf("\t\"golang.org/x/text/encoding/internal/identifier\"\n") |
| fmt.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:] |
| fmt.Printf("// %s is the %s encoding.\n", varName, e.name) |
| if e.comment != "" { |
| fmt.Printf("//\n// %s\n", e.comment) |
| } |
| fmt.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) |
| } |
| fmt.Printf("mib: identifier.%s,\n", e.mib) |
| fmt.Printf("asciiSuperset: %t,\n", asciiSuperset) |
| fmt.Printf("low: 0x%02x,\n", low) |
| fmt.Printf("replacement: 0x%02x,\n", e.replacement) |
| |
| fmt.Printf("decode: [256]utf8Enc{\n") |
| i, backMapping := 0, map[rune]byte{} |
| for _, c := range e.mapping { |
| if _, ok := backMapping[c]; !ok { |
| backMapping[c] = byte(i) |
| } |
| for j := range buf { |
| buf[j] = 0 |
| } |
| n := utf8.EncodeRune(buf, c) |
| if n > 3 { |
| panic(fmt.Sprintf("rune %q (%U) is too long", c, c)) |
| } |
| fmt.Printf("{%d,[3]byte{0x%02x,0x%02x,0x%02x}},", n, buf[0], buf[1], buf[2]) |
| if i%2 == 1 { |
| fmt.Printf("\n") |
| } |
| i++ |
| } |
| fmt.Printf("},\n") |
| |
| fmt.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 { |
| fmt.Printf("0x%08x,", enc) |
| if i%8 == 7 { |
| fmt.Printf("\n") |
| } |
| } |
| fmt.Printf("},\n}\n") |
| } |
| // TODO: add proper line breaking. |
| fmt.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] } |
