Checking in vendor folder for ease of using go get.

vendor/golang.org/x/text/internal/number/gen.go

@@ -0,0 +1,458 @@
+// Copyright 2016 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 (
+	"flag"
+	"fmt"
+	"log"
+	"reflect"
+	"strings"
+	"unicode/utf8"
+
+	"golang.org/x/text/internal"
+	"golang.org/x/text/internal/gen"
+	"golang.org/x/text/internal/number"
+	"golang.org/x/text/internal/stringset"
+	"golang.org/x/text/language"
+	"golang.org/x/text/unicode/cldr"
+)
+
+var (
+	test = flag.Bool("test", false,
+		"test existing tables; can be used to compare web data with package data.")
+	outputFile     = flag.String("output", "tables.go", "output file")
+	outputTestFile = flag.String("testoutput", "data_test.go", "output file")
+
+	draft = flag.String("draft",
+		"contributed",
+		`Minimal draft requirements (approved, contributed, provisional, unconfirmed).`)
+)
+
+func main() {
+	gen.Init()
+
+	const pkg = "number"
+
+	gen.Repackage("gen_common.go", "common.go", pkg)
+	// Read the CLDR zip file.
+	r := gen.OpenCLDRCoreZip()
+	defer r.Close()
+
+	d := &cldr.Decoder{}
+	d.SetDirFilter("supplemental", "main")
+	d.SetSectionFilter("numbers", "numberingSystem")
+	data, err := d.DecodeZip(r)
+	if err != nil {
+		log.Fatalf("DecodeZip: %v", err)
+	}
+
+	w := gen.NewCodeWriter()
+	defer w.WriteGoFile(*outputFile, pkg)
+
+	fmt.Fprintln(w, `import "golang.org/x/text/internal/stringset"`)
+
+	gen.WriteCLDRVersion(w)
+
+	genNumSystem(w, data)
+	genSymbols(w, data)
+	genFormats(w, data)
+}
+
+var systemMap = map[string]system{"latn": 0}
+
+func getNumberSystem(str string) system {
+	ns, ok := systemMap[str]
+	if !ok {
+		log.Fatalf("No index for numbering system %q", str)
+	}
+	return ns
+}
+
+func genNumSystem(w *gen.CodeWriter, data *cldr.CLDR) {
+	numSysData := []systemData{
+		{digitSize: 1, zero: [4]byte{'0'}},
+	}
+
+	for _, ns := range data.Supplemental().NumberingSystems.NumberingSystem {
+		if len(ns.Digits) == 0 {
+			continue
+		}
+		switch ns.Id {
+		case "latn":
+			// hard-wired
+			continue
+		case "hanidec":
+			// non-consecutive digits: treat as "algorithmic"
+			continue
+		}
+
+		zero, sz := utf8.DecodeRuneInString(ns.Digits)
+		if ns.Digits[sz-1]+9 > 0xBF { // 1011 1111: highest continuation byte
+			log.Fatalf("Last byte of zero value overflows for %s", ns.Id)
+		}
+
+		i := rune(0)
+		for _, r := range ns.Digits {
+			// Verify that we can do simple math on the UTF-8 byte sequence
+			// of zero to get the digit.
+			if zero+i != r {
+				// Runes not consecutive.
+				log.Fatalf("Digit %d of %s (%U) is not offset correctly from zero value", i, ns.Id, r)
+			}
+			i++
+		}
+		var x [utf8.UTFMax]byte
+		utf8.EncodeRune(x[:], zero)
+		id := system(len(numSysData))
+		systemMap[ns.Id] = id
+		numSysData = append(numSysData, systemData{
+			id:        id,
+			digitSize: byte(sz),
+			zero:      x,
+		})
+	}
+	w.WriteVar("numSysData", numSysData)
+
+	algoID := system(len(numSysData))
+	fmt.Fprintln(w, "const (")
+	for _, ns := range data.Supplemental().NumberingSystems.NumberingSystem {
+		id, ok := systemMap[ns.Id]
+		if !ok {
+			id = algoID
+			systemMap[ns.Id] = id
+			algoID++
+		}
+		fmt.Fprintf(w, "num%s = %#x\n", strings.Title(ns.Id), id)
+	}
+	fmt.Fprintln(w, "numNumberSystems")
+	fmt.Fprintln(w, ")")
+
+	fmt.Fprintln(w, "var systemMap = map[string]system{")
+	for _, ns := range data.Supplemental().NumberingSystems.NumberingSystem {
+		fmt.Fprintf(w, "%q: num%s,\n", ns.Id, strings.Title(ns.Id))
+		w.Size += len(ns.Id) + 16 + 1 // very coarse approximation
+	}
+	fmt.Fprintln(w, "}")
+}
+
+func genSymbols(w *gen.CodeWriter, data *cldr.CLDR) {
+	d, err := cldr.ParseDraft(*draft)
+	if err != nil {
+		log.Fatalf("invalid draft level: %v", err)
+	}
+
+	nNumberSystems := system(len(systemMap))
+
+	type symbols [NumSymbolTypes]string
+
+	type key struct {
+		tag    int // from language.CompactIndex
+		system system
+	}
+	symbolMap := map[key]*symbols{}
+
+	defaults := map[int]system{}
+
+	for _, lang := range data.Locales() {
+		ldml := data.RawLDML(lang)
+		if ldml.Numbers == nil {
+			continue
+		}
+		langIndex, ok := language.CompactIndex(language.MustParse(lang))
+		if !ok {
+			log.Fatalf("No compact index for language %s", lang)
+		}
+		if d := ldml.Numbers.DefaultNumberingSystem; len(d) > 0 {
+			defaults[langIndex] = getNumberSystem(d[0].Data())
+		}
+
+		syms := cldr.MakeSlice(&ldml.Numbers.Symbols)
+		syms.SelectDraft(d)
+
+		getFirst := func(name string, x interface{}) string {
+			v := reflect.ValueOf(x)
+			slice := cldr.MakeSlice(x)
+			slice.SelectAnyOf("alt", "", "alt")
+			if reflect.Indirect(v).Len() == 0 {
+				return ""
+			} else if reflect.Indirect(v).Len() > 1 {
+				log.Fatalf("%s: multiple values of %q within single symbol not supported.", lang, name)
+			}
+			return reflect.Indirect(v).Index(0).MethodByName("Data").Call(nil)[0].String()
+		}
+
+		for _, sym := range ldml.Numbers.Symbols {
+			if sym.NumberSystem == "" {
+				// This is just linking the default of root to "latn".
+				continue
+			}
+			symbolMap[key{langIndex, getNumberSystem(sym.NumberSystem)}] = &symbols{
+				SymDecimal:                getFirst("decimal", &sym.Decimal),
+				SymGroup:                  getFirst("group", &sym.Group),
+				SymList:                   getFirst("list", &sym.List),
+				SymPercentSign:            getFirst("percentSign", &sym.PercentSign),
+				SymPlusSign:               getFirst("plusSign", &sym.PlusSign),
+				SymMinusSign:              getFirst("minusSign", &sym.MinusSign),
+				SymExponential:            getFirst("exponential", &sym.Exponential),
+				SymSuperscriptingExponent: getFirst("superscriptingExponent", &sym.SuperscriptingExponent),
+				SymPerMille:               getFirst("perMille", &sym.PerMille),
+				SymInfinity:               getFirst("infinity", &sym.Infinity),
+				SymNan:                    getFirst("nan", &sym.Nan),
+				SymTimeSeparator:          getFirst("timeSeparator", &sym.TimeSeparator),
+			}
+		}
+	}
+
+	// Expand all values.
+	for k, syms := range symbolMap {
+		for t := SymDecimal; t < NumSymbolTypes; t++ {
+			p := k.tag
+			for syms[t] == "" {
+				p = int(internal.Parent[p])
+				if pSyms, ok := symbolMap[key{p, k.system}]; ok && (*pSyms)[t] != "" {
+					syms[t] = (*pSyms)[t]
+					break
+				}
+				if p == 0 /* und */ {
+					// Default to root, latn.
+					syms[t] = (*symbolMap[key{}])[t]
+				}
+			}
+		}
+	}
+
+	// Unique the symbol sets and write the string data.
+	m := map[symbols]int{}
+	sb := stringset.NewBuilder()
+
+	symIndex := [][NumSymbolTypes]byte{}
+
+	for ns := system(0); ns < nNumberSystems; ns++ {
+		for _, l := range data.Locales() {
+			langIndex, _ := language.CompactIndex(language.MustParse(l))
+			s := symbolMap[key{langIndex, ns}]
+			if s == nil {
+				continue
+			}
+			if _, ok := m[*s]; !ok {
+				m[*s] = len(symIndex)
+				sb.Add(s[:]...)
+				var x [NumSymbolTypes]byte
+				for i := SymDecimal; i < NumSymbolTypes; i++ {
+					x[i] = byte(sb.Index((*s)[i]))
+				}
+				symIndex = append(symIndex, x)
+			}
+		}
+	}
+	w.WriteVar("symIndex", symIndex)
+	w.WriteVar("symData", sb.Set())
+
+	// resolveSymbolIndex gets the index from the closest matching locale,
+	// including the locale itself.
+	resolveSymbolIndex := func(langIndex int, ns system) symOffset {
+		for {
+			if sym := symbolMap[key{langIndex, ns}]; sym != nil {
+				return symOffset(m[*sym])
+			}
+			if langIndex == 0 {
+				return 0 // und, latn
+			}
+			langIndex = int(internal.Parent[langIndex])
+		}
+	}
+
+	// Create an index with the symbols for each locale for the latn numbering
+	// system. If this is not the default, or the only one, for a locale, we
+	// will overwrite the value later.
+	var langToDefaults [language.NumCompactTags]symOffset
+	for _, l := range data.Locales() {
+		langIndex, _ := language.CompactIndex(language.MustParse(l))
+		langToDefaults[langIndex] = resolveSymbolIndex(langIndex, 0)
+	}
+
+	// Delete redundant entries.
+	for _, l := range data.Locales() {
+		langIndex, _ := language.CompactIndex(language.MustParse(l))
+		def := defaults[langIndex]
+		syms := symbolMap[key{langIndex, def}]
+		if syms == nil {
+			continue
+		}
+		for ns := system(0); ns < nNumberSystems; ns++ {
+			if ns == def {
+				continue
+			}
+			if altSyms, ok := symbolMap[key{langIndex, ns}]; ok && *altSyms == *syms {
+				delete(symbolMap, key{langIndex, ns})
+			}
+		}
+	}
+
+	// Create a sorted list of alternatives per language. This will only need to
+	// be referenced if a user specified an alternative numbering system.
+	var langToAlt []altSymData
+	for _, l := range data.Locales() {
+		langIndex, _ := language.CompactIndex(language.MustParse(l))
+		start := len(langToAlt)
+		if start >= hasNonLatnMask {
+			log.Fatalf("Number of alternative assignments >= %x", hasNonLatnMask)
+		}
+		// Create the entry for the default value.
+		def := defaults[langIndex]
+		langToAlt = append(langToAlt, altSymData{
+			compactTag: uint16(langIndex),
+			system:     def,
+			symIndex:   resolveSymbolIndex(langIndex, def),
+		})
+
+		for ns := system(0); ns < nNumberSystems; ns++ {
+			if def == ns {
+				continue
+			}
+			if sym := symbolMap[key{langIndex, ns}]; sym != nil {
+				langToAlt = append(langToAlt, altSymData{
+					compactTag: uint16(langIndex),
+					system:     ns,
+					symIndex:   resolveSymbolIndex(langIndex, ns),
+				})
+			}
+		}
+		if def == 0 && len(langToAlt) == start+1 {
+			// No additional data: erase the entry.
+			langToAlt = langToAlt[:start]
+		} else {
+			// Overwrite the entry in langToDefaults.
+			langToDefaults[langIndex] = hasNonLatnMask | symOffset(start)
+		}
+	}
+	w.WriteComment(`
+langToDefaults maps a compact language index to the default numbering system
+and default symbol set`)
+	w.WriteVar("langToDefaults", langToDefaults)
+
+	w.WriteComment(`
+langToAlt is a list of numbering system and symbol set pairs, sorted and
+marked by compact language index.`)
+	w.WriteVar("langToAlt", langToAlt)
+}
+
+// genFormats generates the lookup table for decimal, scientific and percent
+// patterns.
+//
+// CLDR allows for patterns to be different per language for different numbering
+// systems. In practice the patterns are set to be consistent for a language
+// independent of the numbering system. genFormats verifies that no language
+// deviates from this.
+func genFormats(w *gen.CodeWriter, data *cldr.CLDR) {
+	d, err := cldr.ParseDraft(*draft)
+	if err != nil {
+		log.Fatalf("invalid draft level: %v", err)
+	}
+
+	// Fill the first slot with a dummy so we can identify unspecified tags.
+	formats := []number.Pattern{{}}
+	patterns := map[string]int{}
+
+	// TODO: It would be possible to eliminate two of these slices by having
+	// another indirection and store a reference to the combination of patterns.
+	decimal := make([]byte, language.NumCompactTags)
+	scientific := make([]byte, language.NumCompactTags)
+	percent := make([]byte, language.NumCompactTags)
+
+	for _, lang := range data.Locales() {
+		ldml := data.RawLDML(lang)
+		if ldml.Numbers == nil {
+			continue
+		}
+		langIndex, ok := language.CompactIndex(language.MustParse(lang))
+		if !ok {
+			log.Fatalf("No compact index for language %s", lang)
+		}
+		type patternSlice []*struct {
+			cldr.Common
+			Numbers string `xml:"numbers,attr"`
+			Count   string `xml:"count,attr"`
+		}
+
+		add := func(name string, tags []byte, ps patternSlice) {
+			sl := cldr.MakeSlice(&ps)
+			sl.SelectDraft(d)
+			if len(ps) == 0 {
+				return
+			}
+			if len(ps) > 2 || len(ps) == 2 && ps[0] != ps[1] {
+				log.Fatalf("Inconsistent %d patterns for language %s", name, lang)
+			}
+			s := ps[0].Data()
+
+			index, ok := patterns[s]
+			if !ok {
+				nf, err := number.ParsePattern(s)
+				if err != nil {
+					log.Fatal(err)
+				}
+				index = len(formats)
+				patterns[s] = index
+				formats = append(formats, *nf)
+			}
+			tags[langIndex] = byte(index)
+		}
+
+		for _, df := range ldml.Numbers.DecimalFormats {
+			for _, l := range df.DecimalFormatLength {
+				if l.Type != "" {
+					continue
+				}
+				for _, f := range l.DecimalFormat {
+					add("decimal", decimal, f.Pattern)
+				}
+			}
+		}
+		for _, df := range ldml.Numbers.ScientificFormats {
+			for _, l := range df.ScientificFormatLength {
+				if l.Type != "" {
+					continue
+				}
+				for _, f := range l.ScientificFormat {
+					add("scientific", scientific, f.Pattern)
+				}
+			}
+		}
+		for _, df := range ldml.Numbers.PercentFormats {
+			for _, l := range df.PercentFormatLength {
+				if l.Type != "" {
+					continue
+				}
+				for _, f := range l.PercentFormat {
+					add("percent", percent, f.Pattern)
+				}
+			}
+		}
+	}
+
+	// Complete the parent tag array to reflect inheritance. An index of 0
+	// indicates an unspecified value.
+	for _, data := range [][]byte{decimal, scientific, percent} {
+		for i := range data {
+			p := uint16(i)
+			for ; data[p] == 0; p = internal.Parent[p] {
+			}
+			data[i] = data[p]
+		}
+	}
+	w.WriteVar("tagToDecimal", decimal)
+	w.WriteVar("tagToScientific", scientific)
+	w.WriteVar("tagToPercent", percent)
+
+	value := strings.Replace(fmt.Sprintf("%#v", formats), "number.", "", -1)
+	// Break up the lines. This won't give ideal perfect formatting, but it is
+	// better than one huge line.
+	value = strings.Replace(value, ", ", ",\n", -1)
+	fmt.Fprintf(w, "var formats = %s\n", value)
+}