// write the data for the given header as single entries. The size for this data
// was already accounted for in writeEntry.
func (h *header) writeSingle(w *gen.CodeWriter, name string) {
if len(dict) > 0 && dict.contains(h.tag) {
tag := identifier(h.tag)
w.WriteConst(tag+name+"Str", h.data)
// Note that we create a slice instead of an array. If we use an array
// we need to refer to it as a[:] in other tables, which will cause the
// array to always be included by the linker. See Issue 7651.
w.WriteVar(tag+name+"Idx", h.index)
}
}
func (b *builder) genCurrencies(w *gen.CodeWriter, data *cldr.SupplementalData) {
// 3-letter ISO currency codes
// Start with dummy to let index start at 1.
currencies := []string{"\x00\x00\x00\x00"}
// currency codes
for _, reg := range data.CurrencyData.Region {
for _, cur := range reg.Currency {
currencies = append(currencies, cur.Iso4217)
}
}
// Not included in the list for some reasons:
currencies = append(currencies, "MVP")
sort.Strings(currencies)
// Unique the elements.
k := 0
for i := 1; i < len(currencies); i++ {
if currencies[k] != currencies[i] {
currencies[k+1] = currencies[i]
k++
}
}
currencies = currencies[:k+1]
// Close with dummy for simpler and faster searching.
currencies = append(currencies, "\xff\xff\xff\xff")
// Write currency values.
fmt.Fprintln(w, "const (")
for _, c := range constants {
index := sort.SearchStrings(currencies, c)
fmt.Fprintf(w, "\t%s = %d\n", strings.ToLower(c), index)
}
fmt.Fprint(w, ")")
// Compute currency-related data that we merge into the table.
for _, info := range data.CurrencyData.Fractions[0].Info {
if info.Iso4217 == "DEFAULT" {
continue
}
standard := getRoundingIndex(info.Digits, info.Rounding, 0)
cash := getRoundingIndex(info.CashDigits, info.CashRounding, standard)
index := sort.SearchStrings(currencies, info.Iso4217)
currencies[index] += mkCurrencyInfo(standard, cash)
}
// Set default values for entries that weren't touched.
for i, c := range currencies {
if len(c) == 3 {
currencies[i] += mkCurrencyInfo(0, 0)
}
}
b.currencies = tag.Index(strings.Join(currencies, ""))
w.WriteComment(`
currency holds an alphabetically sorted list of canonical 3-letter currency
identifiers. Each identifier is followed by a byte of type currencyInfo,
defined in gen_common.go.`)
w.WriteConst("currency", b.currencies)
// Hack alert: gofmt indents a trailing comment after an indented string.
// Ensure that the next thing written is not a comment.
b.numCurrencies = (len(b.currencies) / 4) - 2
w.WriteConst("numCurrencies", b.numCurrencies)
// Create a table that maps regions to currencies.
regionToCurrency := []toCurrency{}
for _, reg := range data.CurrencyData.Region {
if len(reg.Iso3166) != 2 {
log.Fatalf("Unexpected group %q in region data", reg.Iso3166)
}
if len(reg.Currency) == 0 {
continue
}
cur := reg.Currency[0]
if cur.To != "" || cur.Tender == "false" {
continue
}
regionToCurrency = append(regionToCurrency, toCurrency{
region: regionToCode(language.MustParseRegion(reg.Iso3166)),
code: uint16(b.currencies.Index([]byte(cur.Iso4217))),
})
}
sort.Sort(byRegion(regionToCurrency))
w.WriteType(toCurrency{})
w.WriteVar("regionToCurrency", regionToCurrency)
}
// genSymbols generates the symbols used for currencies. Most symbols are
// defined in root and there is only very small variation per language.
// The following rules apply:
// - A symbol can be requested as normal or narrow.
// - If a symbol is not defined for a currency, it defaults to its ISO code.
func (b *builder) genSymbols(w *gen.CodeWriter, data *cldr.CLDR) {
d, err := cldr.ParseDraft(*draft)
if err != nil {
log.Fatalf("filter: %v", err)
}
const (
normal = iota
narrow
numTypes
)
// language -> currency -> type -> symbol
var symbols [language.NumCompactTags][][numTypes]*string
// Collect symbol information per language.
for _, lang := range data.Locales() {
ldml := data.RawLDML(lang)
if ldml.Numbers == nil || ldml.Numbers.Currencies == nil {
continue
}
langIndex, ok := language.CompactIndex(language.MustParse(lang))
if !ok {
log.Fatalf("No compact index for language %s", lang)
}
symbols[langIndex] = make([][numTypes]*string, b.numCurrencies+1)
for _, c := range ldml.Numbers.Currencies.Currency {
syms := cldr.MakeSlice(&c.Symbol)
syms.SelectDraft(d)
for _, sym := range c.Symbol {
v := sym.Data()
if v == c.Type {
// We define "" to mean the ISO symbol.
v = ""
}
cur := b.currencies.Index([]byte(c.Type))
// XXX gets reassigned to 0 in the package's code.
if c.Type == "XXX" {
cur = 0
}
if cur == -1 {
fmt.Println("Unsupported:", c.Type)
continue
}
switch sym.Alt {
case "":
symbols[langIndex][cur][normal] = &v
case "narrow":
symbols[langIndex][cur][narrow] = &v
}
}
}
}
// Remove values identical to the parent.
for langIndex, data := range symbols {
for curIndex, curs := range data {
for typ, sym := range curs {
if sym == nil {
continue
}
for p := uint16(langIndex); p != 0; {
p = internal.Parent[p]
x := symbols[p]
if x == nil {
continue
}
if v := x[curIndex][typ]; v != nil || p == 0 {
// Value is equal to the default value root value is undefined.
parentSym := ""
if v != nil {
parentSym = *v
}
if parentSym == *sym {
// Value is the same as parent.
data[curIndex][typ] = nil
}
break
}
}
}
}
}
// Create symbol index.
symbolData := []byte{0}
symbolLookup := map[string]uint16{"": 0} // 0 means default, so block that value.
for _, data := range symbols {
for _, curs := range data {
for _, sym := range curs {
if sym == nil {
continue
}
if _, ok := symbolLookup[*sym]; !ok {
symbolLookup[*sym] = uint16(len(symbolData))
symbolData = append(symbolData, byte(len(*sym)))
symbolData = append(symbolData, *sym...)
}
}
}
}
w.WriteComment(`
symbols holds symbol data of the form <n> <str>, where n is the length of
the symbol string str.`)
w.WriteConst("symbols", string(symbolData))
// Create index from language to currency lookup to symbol.
type curToIndex struct{ cur, idx uint16 }
w.WriteType(curToIndex{})
prefix := []string{"normal", "narrow"}
// Create data for regular and narrow symbol data.
for typ := normal; typ <= narrow; typ++ {
indexes := []curToIndex{} // maps currency to symbol index
languages := []uint16{}
for _, data := range symbols {
languages = append(languages, uint16(len(indexes)))
for curIndex, curs := range data {
if sym := curs[typ]; sym != nil {
indexes = append(indexes, curToIndex{uint16(curIndex), symbolLookup[*sym]})
}
}
}
languages = append(languages, uint16(len(indexes)))
w.WriteVar(prefix[typ]+"LangIndex", languages)
w.WriteVar(prefix[typ]+"SymIndex", indexes)
}
}
