| // Copyright 2009 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. |
| |
| // Unicode table generator. |
| // Data read from the web. |
| |
| package main |
| |
| import ( |
| "bufio" |
| "flag" |
| "fmt" |
| "http" |
| "log" |
| "os" |
| "path/filepath" |
| "sort" |
| "strconv" |
| "strings" |
| "regexp" |
| "unicode" |
| ) |
| |
| func main() { |
| flag.Parse() |
| loadChars() // always needed |
| loadCasefold() |
| printCategories() |
| printScriptOrProperty(false) |
| printScriptOrProperty(true) |
| printCases() |
| printLatinProperties() |
| printCasefold() |
| printSizes() |
| } |
| |
| var dataURL = flag.String("data", "", "full URL for UnicodeData.txt; defaults to --url/UnicodeData.txt") |
| var casefoldingURL = flag.String("casefolding", "", "full URL for CaseFolding.txt; defaults to --url/CaseFolding.txt") |
| var url = flag.String("url", |
| "http://www.unicode.org/Public/6.0.0/ucd/", |
| "URL of Unicode database directory") |
| var tablelist = flag.String("tables", |
| "all", |
| "comma-separated list of which tables to generate; can be letter") |
| var scriptlist = flag.String("scripts", |
| "all", |
| "comma-separated list of which script tables to generate") |
| var proplist = flag.String("props", |
| "all", |
| "comma-separated list of which property tables to generate") |
| var cases = flag.Bool("cases", |
| true, |
| "generate case tables") |
| var test = flag.Bool("test", |
| false, |
| "test existing tables; can be used to compare web data with package data") |
| var localFiles = flag.Bool("local", |
| false, |
| "data files have been copied to current directory; for debugging only") |
| |
| var scriptRe = regexp.MustCompile(`^([0-9A-F]+)(\.\.[0-9A-F]+)? *; ([A-Za-z_]+)$`) |
| var logger = log.New(os.Stderr, "", log.Lshortfile) |
| |
| type reader struct { |
| *bufio.Reader |
| fd *os.File |
| resp *http.Response |
| } |
| |
| func open(url string) *reader { |
| file := filepath.Base(url) |
| if *localFiles { |
| fd, err := os.Open(file) |
| if err != nil { |
| logger.Fatal(err) |
| } |
| return &reader{bufio.NewReader(fd), fd, nil} |
| } |
| resp, err := http.Get(*dataURL) |
| if err != nil { |
| logger.Fatal(err) |
| } |
| if resp.StatusCode != 200 { |
| logger.Fatalf("bad GET status for %s: %d", file, resp.Status) |
| } |
| return &reader{bufio.NewReader(resp.Body), nil, resp} |
| |
| } |
| |
| func (r *reader) close() { |
| if r.fd != nil { |
| r.fd.Close() |
| } else { |
| r.resp.Body.Close() |
| } |
| } |
| |
| var category = map[string]bool{ |
| // Nd Lu etc. |
| // We use one-character names to identify merged categories |
| "L": true, // Lu Ll Lt Lm Lo |
| "P": true, // Pc Pd Ps Pe Pu Pf Po |
| "M": true, // Mn Mc Me |
| "N": true, // Nd Nl No |
| "S": true, // Sm Sc Sk So |
| "Z": true, // Zs Zl Zp |
| "C": true, // Cc Cf Cs Co Cn |
| } |
| |
| // UnicodeData.txt has form: |
| // 0037;DIGIT SEVEN;Nd;0;EN;;7;7;7;N;;;;; |
| // 007A;LATIN SMALL LETTER Z;Ll;0;L;;;;;N;;;005A;;005A |
| // See http://www.unicode.org/reports/tr44/ for a full explanation |
| // The fields: |
| const ( |
| FCodePoint = iota |
| FName |
| FGeneralCategory |
| FCanonicalCombiningClass |
| FBidiClass |
| FDecompositionTypeAndMapping |
| FNumericType |
| FNumericDigit // If a decimal digit. |
| FNumericValue // Includes non-decimal, e.g. U+2155=1/5 |
| FBidiMirrored |
| FUnicode1Name |
| FISOComment |
| FSimpleUppercaseMapping |
| FSimpleLowercaseMapping |
| FSimpleTitlecaseMapping |
| NumField |
| |
| MaxChar = 0x10FFFF // anything above this shouldn't exist |
| ) |
| |
| var fieldName = []string{ |
| FCodePoint: "CodePoint", |
| FName: "Name", |
| FGeneralCategory: "GeneralCategory", |
| FCanonicalCombiningClass: "CanonicalCombiningClass", |
| FBidiClass: "BidiClass", |
| FDecompositionTypeAndMapping: "DecompositionTypeAndMapping", |
| FNumericType: "NumericType", |
| FNumericDigit: "NumericDigit", |
| FNumericValue: "NumericValue", |
| FBidiMirrored: "BidiMirrored", |
| FUnicode1Name: "Unicode1Name", |
| FISOComment: "ISOComment", |
| FSimpleUppercaseMapping: "SimpleUppercaseMapping", |
| FSimpleLowercaseMapping: "SimpleLowercaseMapping", |
| FSimpleTitlecaseMapping: "SimpleTitlecaseMapping", |
| } |
| |
| // This contains only the properties we're interested in. |
| type Char struct { |
| field []string // debugging only; could be deleted if we take out char.dump() |
| codePoint uint32 // if zero, this index is not a valid code point. |
| category string |
| upperCase int |
| lowerCase int |
| titleCase int |
| foldCase int // simple case folding |
| caseOrbit int // next in simple case folding orbit |
| } |
| |
| // Scripts.txt has form: |
| // A673 ; Cyrillic # Po SLAVONIC ASTERISK |
| // A67C..A67D ; Cyrillic # Mn [2] COMBINING CYRILLIC KAVYKA..COMBINING CYRILLIC PAYEROK |
| // See http://www.unicode.org/Public/5.1.0/ucd/UCD.html for full explanation |
| |
| type Script struct { |
| lo, hi uint32 // range of code points |
| script string |
| } |
| |
| var chars = make([]Char, MaxChar+1) |
| var scripts = make(map[string][]Script) |
| var props = make(map[string][]Script) // a property looks like a script; can share the format |
| |
| var lastChar uint32 = 0 |
| |
| // In UnicodeData.txt, some ranges are marked like this: |
| // 3400;<CJK Ideograph Extension A, First>;Lo;0;L;;;;;N;;;;; |
| // 4DB5;<CJK Ideograph Extension A, Last>;Lo;0;L;;;;;N;;;;; |
| // parseCategory returns a state variable indicating the weirdness. |
| type State int |
| |
| const ( |
| SNormal State = iota // known to be zero for the type |
| SFirst |
| SLast |
| SMissing |
| ) |
| |
| func parseCategory(line string) (state State) { |
| field := strings.Split(line, ";") |
| if len(field) != NumField { |
| logger.Fatalf("%5s: %d fields (expected %d)\n", line, len(field), NumField) |
| } |
| point, err := strconv.Btoui64(field[FCodePoint], 16) |
| if err != nil { |
| logger.Fatalf("%.5s...: %s", line, err) |
| } |
| lastChar = uint32(point) |
| if point == 0 { |
| return // not interesting and we use 0 as unset |
| } |
| if point > MaxChar { |
| return |
| } |
| char := &chars[point] |
| char.field = field |
| if char.codePoint != 0 { |
| logger.Fatalf("point %U reused", point) |
| } |
| char.codePoint = lastChar |
| char.category = field[FGeneralCategory] |
| category[char.category] = true |
| switch char.category { |
| case "Nd": |
| // Decimal digit |
| _, err := strconv.Atoi(field[FNumericValue]) |
| if err != nil { |
| logger.Fatalf("%U: bad numeric field: %s", point, err) |
| } |
| case "Lu": |
| char.letter(field[FCodePoint], field[FSimpleLowercaseMapping], field[FSimpleTitlecaseMapping]) |
| case "Ll": |
| char.letter(field[FSimpleUppercaseMapping], field[FCodePoint], field[FSimpleTitlecaseMapping]) |
| case "Lt": |
| char.letter(field[FSimpleUppercaseMapping], field[FSimpleLowercaseMapping], field[FCodePoint]) |
| default: |
| char.letter(field[FSimpleUppercaseMapping], field[FSimpleLowercaseMapping], field[FSimpleTitlecaseMapping]) |
| } |
| switch { |
| case strings.Index(field[FName], ", First>") > 0: |
| state = SFirst |
| case strings.Index(field[FName], ", Last>") > 0: |
| state = SLast |
| } |
| return |
| } |
| |
| func (char *Char) dump(s string) { |
| fmt.Print(s, " ") |
| for i := 0; i < len(char.field); i++ { |
| fmt.Printf("%s:%q ", fieldName[i], char.field[i]) |
| } |
| fmt.Print("\n") |
| } |
| |
| func (char *Char) letter(u, l, t string) { |
| char.upperCase = char.letterValue(u, "U") |
| char.lowerCase = char.letterValue(l, "L") |
| char.titleCase = char.letterValue(t, "T") |
| } |
| |
| func (char *Char) letterValue(s string, cas string) int { |
| if s == "" { |
| return 0 |
| } |
| v, err := strconv.Btoui64(s, 16) |
| if err != nil { |
| char.dump(cas) |
| logger.Fatalf("%U: bad letter(%s): %s", char.codePoint, s, err) |
| } |
| return int(v) |
| } |
| |
| func allCategories() []string { |
| a := make([]string, len(category)) |
| i := 0 |
| for k := range category { |
| a[i] = k |
| i++ |
| } |
| return a |
| } |
| |
| func all(scripts map[string][]Script) []string { |
| a := make([]string, len(scripts)) |
| i := 0 |
| for k := range scripts { |
| a[i] = k |
| i++ |
| } |
| return a |
| } |
| |
| // Extract the version number from the URL |
| func version() string { |
| // Break on slashes and look for the first numeric field |
| fields := strings.Split(*url, "/") |
| for _, f := range fields { |
| if len(f) > 0 && '0' <= f[0] && f[0] <= '9' { |
| return f |
| } |
| } |
| logger.Fatal("unknown version") |
| return "Unknown" |
| } |
| |
| func categoryOp(code int, class uint8) bool { |
| category := chars[code].category |
| return len(category) > 0 && category[0] == class |
| } |
| |
| func loadChars() { |
| if *dataURL == "" { |
| flag.Set("data", *url+"UnicodeData.txt") |
| } |
| input := open(*dataURL) |
| var first uint32 = 0 |
| for { |
| line, err := input.ReadString('\n') |
| if err != nil { |
| if err == os.EOF { |
| break |
| } |
| logger.Fatal(err) |
| } |
| switch parseCategory(line[0 : len(line)-1]) { |
| case SNormal: |
| if first != 0 { |
| logger.Fatalf("bad state normal at %U", lastChar) |
| } |
| case SFirst: |
| if first != 0 { |
| logger.Fatalf("bad state first at %U", lastChar) |
| } |
| first = lastChar |
| case SLast: |
| if first == 0 { |
| logger.Fatalf("bad state last at %U", lastChar) |
| } |
| for i := first + 1; i <= lastChar; i++ { |
| chars[i] = chars[first] |
| chars[i].codePoint = i |
| } |
| first = 0 |
| } |
| } |
| input.close() |
| } |
| |
| func loadCasefold() { |
| if *casefoldingURL == "" { |
| flag.Set("casefolding", *url+"CaseFolding.txt") |
| } |
| input := open(*casefoldingURL) |
| for { |
| line, err := input.ReadString('\n') |
| if err != nil { |
| if err == os.EOF { |
| break |
| } |
| logger.Fatal(err) |
| } |
| if line[0] == '#' { |
| continue |
| } |
| field := strings.Split(line, "; ") |
| if len(field) != 4 { |
| logger.Fatalf("CaseFolding.txt %.5s...: %d fields (expected %d)\n", line, len(field), 4) |
| } |
| kind := field[1] |
| if kind != "C" && kind != "S" { |
| // Only care about 'common' and 'simple' foldings. |
| continue |
| } |
| p1, err := strconv.Btoui64(field[0], 16) |
| if err != nil { |
| logger.Fatalf("CaseFolding.txt %.5s...: %s", line, err) |
| } |
| p2, err := strconv.Btoui64(field[2], 16) |
| if err != nil { |
| logger.Fatalf("CaseFolding.txt %.5s...: %s", line, err) |
| } |
| chars[p1].foldCase = int(p2) |
| } |
| input.close() |
| } |
| |
| const progHeader = `// Generated by running |
| // maketables --tables=%s --data=%s --casefolding=%s |
| // DO NOT EDIT |
| |
| package unicode |
| |
| ` |
| |
| func printCategories() { |
| if *tablelist == "" { |
| return |
| } |
| // Find out which categories to dump |
| list := strings.Split(*tablelist, ",") |
| if *tablelist == "all" { |
| list = allCategories() |
| } |
| if *test { |
| fullCategoryTest(list) |
| return |
| } |
| fmt.Printf(progHeader, *tablelist, *dataURL, *casefoldingURL) |
| |
| fmt.Println("// Version is the Unicode edition from which the tables are derived.") |
| fmt.Printf("const Version = %q\n\n", version()) |
| |
| if *tablelist == "all" { |
| fmt.Println("// Categories is the set of Unicode data tables.") |
| fmt.Println("var Categories = map[string] *RangeTable {") |
| for k := range category { |
| fmt.Printf("\t%q: %s,\n", k, k) |
| } |
| fmt.Print("}\n\n") |
| } |
| |
| decl := make(sort.StringSlice, len(list)) |
| ndecl := 0 |
| for _, name := range list { |
| if _, ok := category[name]; !ok { |
| logger.Fatal("unknown category", name) |
| } |
| // We generate an UpperCase name to serve as concise documentation and an _UnderScored |
| // name to store the data. This stops godoc dumping all the tables but keeps them |
| // available to clients. |
| // Cases deserving special comments |
| varDecl := "" |
| switch name { |
| case "C": |
| varDecl = "\tOther = _C; // Other/C is the set of Unicode control and special characters, category C.\n" |
| varDecl += "\tC = _C\n" |
| case "L": |
| varDecl = "\tLetter = _L; // Letter/L is the set of Unicode letters, category L.\n" |
| varDecl += "\tL = _L\n" |
| case "M": |
| varDecl = "\tMark = _M; // Mark/M is the set of Unicode mark characters, category M.\n" |
| varDecl += "\tM = _M\n" |
| case "N": |
| varDecl = "\tNumber = _N; // Number/N is the set of Unicode number characters, category N.\n" |
| varDecl += "\tN = _N\n" |
| case "P": |
| varDecl = "\tPunct = _P; // Punct/P is the set of Unicode punctuation characters, category P.\n" |
| varDecl += "\tP = _P\n" |
| case "S": |
| varDecl = "\tSymbol = _S; // Symbol/S is the set of Unicode symbol characters, category S.\n" |
| varDecl += "\tS = _S\n" |
| case "Z": |
| varDecl = "\tSpace = _Z; // Space/Z is the set of Unicode space characters, category Z.\n" |
| varDecl += "\tZ = _Z\n" |
| case "Nd": |
| varDecl = "\tDigit = _Nd; // Digit is the set of Unicode characters with the \"decimal digit\" property.\n" |
| case "Lu": |
| varDecl = "\tUpper = _Lu; // Upper is the set of Unicode upper case letters.\n" |
| case "Ll": |
| varDecl = "\tLower = _Ll; // Lower is the set of Unicode lower case letters.\n" |
| case "Lt": |
| varDecl = "\tTitle = _Lt; // Title is the set of Unicode title case letters.\n" |
| } |
| if len(name) > 1 { |
| varDecl += fmt.Sprintf( |
| "\t%s = _%s; // %s is the set of Unicode characters in category %s.\n", |
| name, name, name, name) |
| } |
| decl[ndecl] = varDecl |
| ndecl++ |
| if len(name) == 1 { // unified categories |
| decl := fmt.Sprintf("var _%s = &RangeTable{\n", name) |
| dumpRange( |
| decl, |
| func(code int) bool { return categoryOp(code, name[0]) }) |
| continue |
| } |
| dumpRange( |
| fmt.Sprintf("var _%s = &RangeTable{\n", name), |
| func(code int) bool { return chars[code].category == name }) |
| } |
| decl.Sort() |
| fmt.Println("var (") |
| for _, d := range decl { |
| fmt.Print(d) |
| } |
| fmt.Print(")\n\n") |
| } |
| |
| type Op func(code int) bool |
| |
| const format = "\t\t{0x%04x, 0x%04x, %d},\n" |
| |
| func dumpRange(header string, inCategory Op) { |
| fmt.Print(header) |
| next := 0 |
| fmt.Print("\tR16: []Range16{\n") |
| // one Range for each iteration |
| count := &range16Count |
| size := 16 |
| for { |
| // look for start of range |
| for next < len(chars) && !inCategory(next) { |
| next++ |
| } |
| if next >= len(chars) { |
| // no characters remain |
| break |
| } |
| |
| // start of range |
| lo := next |
| hi := next |
| stride := 1 |
| // accept lo |
| next++ |
| // look for another character to set the stride |
| for next < len(chars) && !inCategory(next) { |
| next++ |
| } |
| if next >= len(chars) { |
| // no more characters |
| fmt.Printf(format, lo, hi, stride) |
| break |
| } |
| // set stride |
| stride = next - lo |
| // check for length of run. next points to first jump in stride |
| for i := next; i < len(chars); i++ { |
| if inCategory(i) == (((i - lo) % stride) == 0) { |
| // accept |
| if inCategory(i) { |
| hi = i |
| } |
| } else { |
| // no more characters in this run |
| break |
| } |
| } |
| size, count = printRange(uint32(lo), uint32(hi), uint32(stride), size, count) |
| // next range: start looking where this range ends |
| next = hi + 1 |
| } |
| fmt.Print("\t},\n") |
| fmt.Print("}\n\n") |
| } |
| |
| func printRange(lo, hi, stride uint32, size int, count *int) (int, *int) { |
| if size == 16 && hi >= 1<<16 { |
| if lo < 1<<16 { |
| if lo+stride != hi { |
| logger.Fatalf("unexpected straddle: %U %U %d", lo, hi, stride) |
| } |
| // No range contains U+FFFF as an instance, so split |
| // the range into two entries. That way we can maintain |
| // the invariant that R32 contains only >= 1<<16. |
| fmt.Printf(format, lo, lo, 1) |
| lo = hi |
| stride = 1 |
| *count++ |
| } |
| fmt.Print("\t},\n") |
| fmt.Print("\tR32: []Range32{\n") |
| size = 32 |
| count = &range32Count |
| } |
| fmt.Printf(format, lo, hi, stride) |
| *count++ |
| return size, count |
| } |
| |
| func fullCategoryTest(list []string) { |
| for _, name := range list { |
| if _, ok := category[name]; !ok { |
| logger.Fatal("unknown category", name) |
| } |
| r, ok := unicode.Categories[name] |
| if !ok && len(name) > 1 { |
| logger.Fatalf("unknown table %q", name) |
| } |
| if len(name) == 1 { |
| verifyRange(name, func(code int) bool { return categoryOp(code, name[0]) }, r) |
| } else { |
| verifyRange( |
| name, |
| func(code int) bool { return chars[code].category == name }, |
| r) |
| } |
| } |
| } |
| |
| func verifyRange(name string, inCategory Op, table *unicode.RangeTable) { |
| count := 0 |
| for i := range chars { |
| web := inCategory(i) |
| pkg := unicode.Is(table, i) |
| if web != pkg { |
| fmt.Fprintf(os.Stderr, "%s: %U: web=%t pkg=%t\n", name, i, web, pkg) |
| count++ |
| if count > 10 { |
| break |
| } |
| } |
| } |
| } |
| |
| func parseScript(line string, scripts map[string][]Script) { |
| comment := strings.Index(line, "#") |
| if comment >= 0 { |
| line = line[0:comment] |
| } |
| line = strings.TrimSpace(line) |
| if len(line) == 0 { |
| return |
| } |
| field := strings.Split(line, ";") |
| if len(field) != 2 { |
| logger.Fatalf("%s: %d fields (expected 2)\n", line, len(field)) |
| } |
| matches := scriptRe.FindStringSubmatch(line) |
| if len(matches) != 4 { |
| logger.Fatalf("%s: %d matches (expected 3)\n", line, len(matches)) |
| } |
| lo, err := strconv.Btoui64(matches[1], 16) |
| if err != nil { |
| logger.Fatalf("%.5s...: %s", line, err) |
| } |
| hi := lo |
| if len(matches[2]) > 2 { // ignore leading .. |
| hi, err = strconv.Btoui64(matches[2][2:], 16) |
| if err != nil { |
| logger.Fatalf("%.5s...: %s", line, err) |
| } |
| } |
| name := matches[3] |
| scripts[name] = append(scripts[name], Script{uint32(lo), uint32(hi), name}) |
| } |
| |
| // The script tables have a lot of adjacent elements. Fold them together. |
| func foldAdjacent(r []Script) []unicode.Range32 { |
| s := make([]unicode.Range32, 0, len(r)) |
| j := 0 |
| for i := 0; i < len(r); i++ { |
| if j > 0 && r[i].lo == s[j-1].Hi+1 { |
| s[j-1].Hi = r[i].hi |
| } else { |
| s = s[0 : j+1] |
| s[j] = unicode.Range32{uint32(r[i].lo), uint32(r[i].hi), 1} |
| j++ |
| } |
| } |
| return s |
| } |
| |
| func fullScriptTest(list []string, installed map[string]*unicode.RangeTable, scripts map[string][]Script) { |
| for _, name := range list { |
| if _, ok := scripts[name]; !ok { |
| logger.Fatal("unknown script", name) |
| } |
| _, ok := installed[name] |
| if !ok { |
| logger.Fatal("unknown table", name) |
| } |
| for _, script := range scripts[name] { |
| for r := script.lo; r <= script.hi; r++ { |
| if !unicode.Is(installed[name], int(r)) { |
| fmt.Fprintf(os.Stderr, "%U: not in script %s\n", r, name) |
| } |
| } |
| } |
| } |
| } |
| |
| // PropList.txt has the same format as Scripts.txt so we can share its parser. |
| func printScriptOrProperty(doProps bool) { |
| flag := "scripts" |
| flaglist := *scriptlist |
| file := "Scripts.txt" |
| table := scripts |
| installed := unicode.Scripts |
| if doProps { |
| flag = "props" |
| flaglist = *proplist |
| file = "PropList.txt" |
| table = props |
| installed = unicode.Properties |
| } |
| if flaglist == "" { |
| return |
| } |
| input := open(*url + file) |
| for { |
| line, err := input.ReadString('\n') |
| if err != nil { |
| if err == os.EOF { |
| break |
| } |
| logger.Fatal(err) |
| } |
| parseScript(line[0:len(line)-1], table) |
| } |
| input.close() |
| |
| // Find out which scripts to dump |
| list := strings.Split(flaglist, ",") |
| if flaglist == "all" { |
| list = all(table) |
| } |
| if *test { |
| fullScriptTest(list, installed, table) |
| return |
| } |
| |
| fmt.Printf( |
| "// Generated by running\n"+ |
| "// maketables --%s=%s --url=%s\n"+ |
| "// DO NOT EDIT\n\n", |
| flag, |
| flaglist, |
| *url) |
| if flaglist == "all" { |
| if doProps { |
| fmt.Println("// Properties is the set of Unicode property tables.") |
| fmt.Println("var Properties = map[string] *RangeTable{") |
| } else { |
| fmt.Println("// Scripts is the set of Unicode script tables.") |
| fmt.Println("var Scripts = map[string] *RangeTable{") |
| } |
| for k := range table { |
| fmt.Printf("\t%q: %s,\n", k, k) |
| } |
| fmt.Print("}\n\n") |
| } |
| |
| decl := make(sort.StringSlice, len(list)) |
| ndecl := 0 |
| for _, name := range list { |
| if doProps { |
| decl[ndecl] = fmt.Sprintf( |
| "\t%s = _%s;\t// %s is the set of Unicode characters with property %s.\n", |
| name, name, name, name) |
| } else { |
| decl[ndecl] = fmt.Sprintf( |
| "\t%s = _%s;\t// %s is the set of Unicode characters in script %s.\n", |
| name, name, name, name) |
| } |
| ndecl++ |
| fmt.Printf("var _%s = &RangeTable {\n", name) |
| fmt.Print("\tR16: []Range16{\n") |
| ranges := foldAdjacent(table[name]) |
| size := 16 |
| count := &range16Count |
| for _, s := range ranges { |
| size, count = printRange(s.Lo, s.Hi, s.Stride, size, count) |
| } |
| fmt.Print("\t},\n") |
| fmt.Print("}\n\n") |
| } |
| decl.Sort() |
| fmt.Println("var (") |
| for _, d := range decl { |
| fmt.Print(d) |
| } |
| fmt.Print(")\n\n") |
| } |
| |
| const ( |
| CaseUpper = 1 << iota |
| CaseLower |
| CaseTitle |
| CaseNone = 0 // must be zero |
| CaseMissing = -1 // character not present; not a valid case state |
| ) |
| |
| type caseState struct { |
| point int |
| _case int |
| deltaToUpper int |
| deltaToLower int |
| deltaToTitle int |
| } |
| |
| // Is d a continuation of the state of c? |
| func (c *caseState) adjacent(d *caseState) bool { |
| if d.point < c.point { |
| c, d = d, c |
| } |
| switch { |
| case d.point != c.point+1: // code points not adjacent (shouldn't happen) |
| return false |
| case d._case != c._case: // different cases |
| return c.upperLowerAdjacent(d) |
| case c._case == CaseNone: |
| return false |
| case c._case == CaseMissing: |
| return false |
| case d.deltaToUpper != c.deltaToUpper: |
| return false |
| case d.deltaToLower != c.deltaToLower: |
| return false |
| case d.deltaToTitle != c.deltaToTitle: |
| return false |
| } |
| return true |
| } |
| |
| // Is d the same as c, but opposite in upper/lower case? this would make it |
| // an element of an UpperLower sequence. |
| func (c *caseState) upperLowerAdjacent(d *caseState) bool { |
| // check they're a matched case pair. we know they have adjacent values |
| switch { |
| case c._case == CaseUpper && d._case != CaseLower: |
| return false |
| case c._case == CaseLower && d._case != CaseUpper: |
| return false |
| } |
| // matched pair (at least in upper/lower). make the order Upper Lower |
| if c._case == CaseLower { |
| c, d = d, c |
| } |
| // for an Upper Lower sequence the deltas have to be in order |
| // c: 0 1 0 |
| // d: -1 0 -1 |
| switch { |
| case c.deltaToUpper != 0: |
| return false |
| case c.deltaToLower != 1: |
| return false |
| case c.deltaToTitle != 0: |
| return false |
| case d.deltaToUpper != -1: |
| return false |
| case d.deltaToLower != 0: |
| return false |
| case d.deltaToTitle != -1: |
| return false |
| } |
| return true |
| } |
| |
| // Does this character start an UpperLower sequence? |
| func (c *caseState) isUpperLower() bool { |
| // for an Upper Lower sequence the deltas have to be in order |
| // c: 0 1 0 |
| switch { |
| case c.deltaToUpper != 0: |
| return false |
| case c.deltaToLower != 1: |
| return false |
| case c.deltaToTitle != 0: |
| return false |
| } |
| return true |
| } |
| |
| // Does this character start a LowerUpper sequence? |
| func (c *caseState) isLowerUpper() bool { |
| // for an Upper Lower sequence the deltas have to be in order |
| // c: -1 0 -1 |
| switch { |
| case c.deltaToUpper != -1: |
| return false |
| case c.deltaToLower != 0: |
| return false |
| case c.deltaToTitle != -1: |
| return false |
| } |
| return true |
| } |
| |
| func getCaseState(i int) (c *caseState) { |
| c = &caseState{point: i, _case: CaseNone} |
| ch := &chars[i] |
| switch int(ch.codePoint) { |
| case 0: |
| c._case = CaseMissing // Will get NUL wrong but that doesn't matter |
| return |
| case ch.upperCase: |
| c._case = CaseUpper |
| case ch.lowerCase: |
| c._case = CaseLower |
| case ch.titleCase: |
| c._case = CaseTitle |
| } |
| // Some things such as roman numeral U+2161 don't describe themselves |
| // as upper case, but have a lower case. Second-guess them. |
| if c._case == CaseNone && ch.lowerCase != 0 { |
| c._case = CaseUpper |
| } |
| // Same in the other direction. |
| if c._case == CaseNone && ch.upperCase != 0 { |
| c._case = CaseLower |
| } |
| |
| if ch.upperCase != 0 { |
| c.deltaToUpper = ch.upperCase - i |
| } |
| if ch.lowerCase != 0 { |
| c.deltaToLower = ch.lowerCase - i |
| } |
| if ch.titleCase != 0 { |
| c.deltaToTitle = ch.titleCase - i |
| } |
| return |
| } |
| |
| func printCases() { |
| if !*cases { |
| return |
| } |
| if *test { |
| fullCaseTest() |
| return |
| } |
| fmt.Printf( |
| "// Generated by running\n"+ |
| "// maketables --data=%s --casefolding=%s\n"+ |
| "// DO NOT EDIT\n\n"+ |
| "// CaseRanges is the table describing case mappings for all letters with\n"+ |
| "// non-self mappings.\n"+ |
| "var CaseRanges = _CaseRanges\n"+ |
| "var _CaseRanges = []CaseRange {\n", |
| *dataURL, *casefoldingURL) |
| |
| var startState *caseState // the start of a run; nil for not active |
| var prevState = &caseState{} // the state of the previous character |
| for i := range chars { |
| state := getCaseState(i) |
| if state.adjacent(prevState) { |
| prevState = state |
| continue |
| } |
| // end of run (possibly) |
| printCaseRange(startState, prevState) |
| startState = nil |
| if state._case != CaseMissing && state._case != CaseNone { |
| startState = state |
| } |
| prevState = state |
| } |
| fmt.Print("}\n") |
| } |
| |
| func printCaseRange(lo, hi *caseState) { |
| if lo == nil { |
| return |
| } |
| if lo.deltaToUpper == 0 && lo.deltaToLower == 0 && lo.deltaToTitle == 0 { |
| // character represents itself in all cases - no need to mention it |
| return |
| } |
| switch { |
| case hi.point > lo.point && lo.isUpperLower(): |
| fmt.Printf("\t{0x%04X, 0x%04X, d{UpperLower, UpperLower, UpperLower}},\n", |
| lo.point, hi.point) |
| case hi.point > lo.point && lo.isLowerUpper(): |
| logger.Fatalf("LowerUpper sequence: should not happen: %U. If it's real, need to fix To()", lo.point) |
| fmt.Printf("\t{0x%04X, 0x%04X, d{LowerUpper, LowerUpper, LowerUpper}},\n", |
| lo.point, hi.point) |
| default: |
| fmt.Printf("\t{0x%04X, 0x%04X, d{%d, %d, %d}},\n", |
| lo.point, hi.point, |
| lo.deltaToUpper, lo.deltaToLower, lo.deltaToTitle) |
| } |
| } |
| |
| // If the cased value in the Char is 0, it means use the rune itself. |
| func caseIt(rune, cased int) int { |
| if cased == 0 { |
| return rune |
| } |
| return cased |
| } |
| |
| func fullCaseTest() { |
| for i, c := range chars { |
| lower := unicode.ToLower(i) |
| want := caseIt(i, c.lowerCase) |
| if lower != want { |
| fmt.Fprintf(os.Stderr, "lower %U should be %U is %U\n", i, want, lower) |
| } |
| upper := unicode.ToUpper(i) |
| want = caseIt(i, c.upperCase) |
| if upper != want { |
| fmt.Fprintf(os.Stderr, "upper %U should be %U is %U\n", i, want, upper) |
| } |
| title := unicode.ToTitle(i) |
| want = caseIt(i, c.titleCase) |
| if title != want { |
| fmt.Fprintf(os.Stderr, "title %U should be %U is %U\n", i, want, title) |
| } |
| } |
| } |
| |
| func printLatinProperties() { |
| if *test { |
| return |
| } |
| fmt.Println("var properties = [MaxLatin1+1]uint8{") |
| for code := 0; code <= unicode.MaxLatin1; code++ { |
| var property string |
| switch chars[code].category { |
| case "Cc", "": // NUL has no category. |
| property = "pC" |
| case "Cf": // soft hyphen, unique category, not printable. |
| property = "0" |
| case "Ll": |
| property = "pLl | pp" |
| case "Lu": |
| property = "pLu | pp" |
| case "Nd", "No": |
| property = "pN | pp" |
| case "Pc", "Pd", "Pe", "Pf", "Pi", "Po", "Ps": |
| property = "pP | pp" |
| case "Sc", "Sk", "Sm", "So": |
| property = "pS | pp" |
| case "Zs": |
| property = "pZ" |
| default: |
| logger.Fatalf("%U has unknown category %q", code, chars[code].category) |
| } |
| // Special case |
| if code == ' ' { |
| property = "pZ | pp" |
| } |
| fmt.Printf("\t0x%02X: %s, // %q\n", code, property, code) |
| } |
| fmt.Printf("}\n\n") |
| } |
| |
| func printCasefold() { |
| // Build list of case-folding groups attached to each canonical folded char (typically lower case). |
| var caseOrbit = make([][]int, MaxChar+1) |
| for i := range chars { |
| c := &chars[i] |
| if c.foldCase == 0 { |
| continue |
| } |
| orb := caseOrbit[c.foldCase] |
| if orb == nil { |
| orb = append(orb, c.foldCase) |
| } |
| caseOrbit[c.foldCase] = append(orb, i) |
| } |
| |
| // Insert explicit 1-element groups when assuming [lower, upper] would be wrong. |
| for i := range chars { |
| c := &chars[i] |
| f := c.foldCase |
| if f == 0 { |
| f = i |
| } |
| orb := caseOrbit[f] |
| if orb == nil && (c.upperCase != 0 && c.upperCase != i || c.lowerCase != 0 && c.lowerCase != i) { |
| // Default assumption of [upper, lower] is wrong. |
| caseOrbit[i] = []int{i} |
| } |
| } |
| |
| // Delete the groups for which assuming [lower, upper] is right. |
| for i, orb := range caseOrbit { |
| if len(orb) == 2 && chars[orb[0]].upperCase == orb[1] && chars[orb[1]].lowerCase == orb[0] { |
| caseOrbit[i] = nil |
| } |
| } |
| |
| // Record orbit information in chars. |
| for _, orb := range caseOrbit { |
| if orb == nil { |
| continue |
| } |
| sort.Ints(orb) |
| c := orb[len(orb)-1] |
| for _, d := range orb { |
| chars[c].caseOrbit = d |
| c = d |
| } |
| } |
| |
| printCaseOrbit() |
| |
| // Tables of category and script folding exceptions: code points |
| // that must be added when interpreting a particular category/script |
| // in a case-folding context. |
| cat := make(map[string]map[int]bool) |
| for name := range category { |
| if x := foldExceptions(inCategory(name)); len(x) > 0 { |
| cat[name] = x |
| } |
| } |
| |
| scr := make(map[string]map[int]bool) |
| for name := range scripts { |
| if x := foldExceptions(inScript(name)); len(x) > 0 { |
| cat[name] = x |
| } |
| } |
| |
| printCatFold("FoldCategory", cat) |
| printCatFold("FoldScript", scr) |
| } |
| |
| // inCategory returns a list of all the runes in the category. |
| func inCategory(name string) []int { |
| var x []int |
| for i := range chars { |
| c := &chars[i] |
| if c.category == name || len(name) == 1 && len(c.category) > 1 && c.category[0] == name[0] { |
| x = append(x, i) |
| } |
| } |
| return x |
| } |
| |
| // inScript returns a list of all the runes in the script. |
| func inScript(name string) []int { |
| var x []int |
| for _, s := range scripts[name] { |
| for c := s.lo; c <= s.hi; c++ { |
| x = append(x, int(c)) |
| } |
| } |
| return x |
| } |
| |
| // foldExceptions returns a list of all the runes fold-equivalent |
| // to runes in class but not in class themselves. |
| func foldExceptions(class []int) map[int]bool { |
| // Create map containing class and all fold-equivalent chars. |
| m := make(map[int]bool) |
| for _, r := range class { |
| c := &chars[r] |
| if c.caseOrbit == 0 { |
| // Just upper and lower. |
| if u := c.upperCase; u != 0 { |
| m[u] = true |
| } |
| if l := c.lowerCase; l != 0 { |
| m[l] = true |
| } |
| m[r] = true |
| continue |
| } |
| // Otherwise walk orbit. |
| r0 := r |
| for { |
| m[r] = true |
| r = chars[r].caseOrbit |
| if r == r0 { |
| break |
| } |
| } |
| } |
| |
| // Remove class itself. |
| for _, r := range class { |
| m[r] = false, false |
| } |
| |
| // What's left is the exceptions. |
| return m |
| } |
| |
| var comment = map[string]string{ |
| "FoldCategory": "// FoldCategory maps a category name to a table of\n" + |
| "// code points outside the category that are equivalent under\n" + |
| "// simple case folding to code points inside the category.\n" + |
| "// If there is no entry for a category name, there are no such points.\n", |
| |
| "FoldScript": "// FoldScript maps a script name to a table of\n" + |
| "// code points outside the script that are equivalent under\n" + |
| "// simple case folding to code points inside the script.\n" + |
| "// If there is no entry for a script name, there are no such points.\n", |
| } |
| |
| func printCaseOrbit() { |
| if *test { |
| for i := range chars { |
| c := &chars[i] |
| f := c.caseOrbit |
| if f == 0 { |
| if c.lowerCase != i && c.lowerCase != 0 { |
| f = c.lowerCase |
| } else if c.upperCase != i && c.upperCase != 0 { |
| f = c.upperCase |
| } else { |
| f = i |
| } |
| } |
| if g := unicode.SimpleFold(i); g != f { |
| fmt.Fprintf(os.Stderr, "unicode.SimpleFold(%#U) = %#U, want %#U\n", i, g, f) |
| } |
| } |
| return |
| } |
| |
| fmt.Printf("var caseOrbit = []foldPair{\n") |
| for i := range chars { |
| c := &chars[i] |
| if c.caseOrbit != 0 { |
| fmt.Printf("\t{0x%04X, 0x%04X},\n", i, c.caseOrbit) |
| foldPairCount++ |
| } |
| } |
| fmt.Printf("}\n\n") |
| } |
| |
| func printCatFold(name string, m map[string]map[int]bool) { |
| if *test { |
| var pkgMap map[string]*unicode.RangeTable |
| if name == "FoldCategory" { |
| pkgMap = unicode.FoldCategory |
| } else { |
| pkgMap = unicode.FoldScript |
| } |
| if len(pkgMap) != len(m) { |
| fmt.Fprintf(os.Stderr, "unicode.%s has %d elements, want %d\n", name, len(pkgMap), len(m)) |
| return |
| } |
| for k, v := range m { |
| t, ok := pkgMap[k] |
| if !ok { |
| fmt.Fprintf(os.Stderr, "unicode.%s[%q] missing\n", name, k) |
| continue |
| } |
| n := 0 |
| for _, r := range t.R16 { |
| for c := int(r.Lo); c <= int(r.Hi); c += int(r.Stride) { |
| if !v[c] { |
| fmt.Fprintf(os.Stderr, "unicode.%s[%q] contains %#U, should not\n", name, k, c) |
| } |
| n++ |
| } |
| } |
| for _, r := range t.R32 { |
| for c := int(r.Lo); c <= int(r.Hi); c += int(r.Stride) { |
| if !v[c] { |
| fmt.Fprintf(os.Stderr, "unicode.%s[%q] contains %#U, should not\n", name, k, c) |
| } |
| n++ |
| } |
| } |
| if n != len(v) { |
| fmt.Fprintf(os.Stderr, "unicode.%s[%q] has %d code points, want %d\n", name, k, n, len(v)) |
| } |
| } |
| return |
| } |
| |
| fmt.Print(comment[name]) |
| fmt.Printf("var %s = map[string]*RangeTable{\n", name) |
| for name := range m { |
| fmt.Printf("\t%q: fold%s,\n", name, name) |
| } |
| fmt.Printf("}\n\n") |
| for name, class := range m { |
| dumpRange( |
| fmt.Sprintf("var fold%s = &RangeTable{\n", name), |
| func(code int) bool { return class[code] }) |
| } |
| } |
| |
| var range16Count = 0 // Number of entries in the 16-bit range tables. |
| var range32Count = 0 // Number of entries in the 32-bit range tables. |
| var foldPairCount = 0 // Number of fold pairs in the exception tables. |
| |
| func printSizes() { |
| if *test { |
| return |
| } |
| fmt.Println() |
| fmt.Printf("// Range entries: %d 16-bit, %d 32-bit, %d total.\n", range16Count, range32Count, range16Count+range32Count) |
| range16Bytes := range16Count * 3 * 2 |
| range32Bytes := range32Count * 3 * 4 |
| fmt.Printf("// Range bytes: %d 16-bit, %d 32-bit, %d total.\n", range16Bytes, range32Bytes, range16Bytes+range32Bytes) |
| fmt.Println() |
| fmt.Printf("// Fold orbit bytes: %d pairs, %d bytes\n", foldPairCount, foldPairCount*2*2) |
| } |