// 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 037", "IBM037", "", "CodePage037", 0x3f, "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM037-2.1.2.ucm", }, { "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", }, { "IBM Code Page 1047", "IBM1047", "", "CodePage1047", 0x3f, "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM1047-2.1.2.ucm", }, { "IBM Code Page 1140", "IBM01140", "", "CodePage1140", 0x3f, "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/ibm-1140_P100-1997.ucm", }, { "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 8859-9", "ISOLatin5", "", "ISO8859_9", encoding.ASCIISub, "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/iso-8859_9-1999.ucm", }, { "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, ` \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 *Charmap = &%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] }