func()

in currency/gen.go [258:393]

• 111 lines of code
• 32 McCabe index (conditional complexity)

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 [compact.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 := compact.LanguageID(compact.Tag(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 := compact.ID(langIndex); p != 0; {
					p = p.Parent()
					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)
	}
}