mirror of
https://github.com/golang/go
synced 2024-11-21 21:44:40 -07:00
exp/locale/collate: Added functionality to parse and process LDML files
for both locale-specific exemplar characters and tailorings to
the collation table.
Some specifices:
- Moved stringSet to the beginning of the file and added some functionality
to parse command line files.
- openReader now modifies the input URL for localFiles to guarantee that
any http source listed in the generated file is indeed this source.
- Note that the implementation of the Tailoring API used by maketables.go
is not yet checked in. So for now adding tailorings are simply no-ops.
- The generated file of exemplar characters will be used somewhere else.
Here is a snippet of how the body of the generated file looks like:
type exemplarType int
const (
exCharacters exemplarType = iota
exContractions
exPunctuation
exAuxiliary
exCurrency
exIndex
exN
)
var exemplarCharacters = map[string][exN]string{
"af": [exN]string{
0: "a á â b c d e é è ê ë f g h i î ï j k l m n o ô ö p q r s t u û v w x y z",
3: "á à â ä ã æ ç é è ê ë í ì î ï ó ò ô ö ú ù û ü ý",
4: "a b c d e f g h i j k l m n o p q r s t u v w x y z",
},
...
}
R=r
CC=golang-dev
https://golang.org/cl/6501070
This commit is contained in:
Marcel van Lohuizen
parent
18aa55c169
commit
5a78e5ea4c
@ -10,13 +10,16 @@
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package main
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import (
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"archive/zip"
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"bufio"
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"bytes"
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"encoding/xml"
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"exp/locale/collate"
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"exp/locale/collate/build"
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"flag"
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"net/http"
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"os"
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@ -26,17 +29,155 @@ import (
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"strconv"
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"strings"
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"unicode"
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"unicode/utf8"
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)
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var ducet = flag.String("ducet",
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"http://unicode.org/Public/UCA/"+unicode.Version+"/allkeys.txt",
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"URL of the Default Unicode Collation Element Table (DUCET).")
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var test = flag.Bool("test",
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false,
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"test existing tables; can be used to compare web data with package data")
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var localFiles = flag.Bool("local",
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false,
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"data files have been copied to the current directory; for debugging only")
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var (
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// TODO: change default to "http://unicode.org/Public/UCA/"+unicode.Version+"/CollationAuxiliary.zip"
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root = flag.String("root",
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"http://unicode.org/Public/UCA/"+unicode.Version+"/allkeys.txt",
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`URL of the Default Unicode Collation Element Table (DUCET). This can be a zip
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file containing the file allkeys_CLDR.txt or an allkeys.txt file.`)
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cldr = flag.String("cldr",
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"http://www.unicode.org/Public/cldr/2.0.1/core.zip",
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"URL of CLDR archive.")
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test = flag.Bool("test", false,
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"test existing tables; can be used to compare web data with package data.")
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localFiles = flag.Bool("local", false,
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"data files have been copied to the current directory; for debugging only.")
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short = flag.Bool("short", false, `Use "short" alternatives, when available.`)
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draft = flag.Bool("draft", false, `Use draft versions, when available.`)
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tags = flag.String("tags", "", "build tags to be included after +build directive")
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pkg = flag.String("package", "collate",
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"the name of the package in which the generated file is to be included")
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tables = flagStringSetAllowAll("tables", "collate", "collate,chars",
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"comma-spearated list of tables to generate.")
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exclude = flagStringSet("exclude", "zh2", "",
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"comma-separated list of languages to exclude.")
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include = flagStringSet("include", "", "",
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"comma-separated list of languages to include. Include trumps exclude.")
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types = flagStringSetAllowAll("types", "", "",
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"comma-separated list of types that should be included in addition to the standard type.")
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)
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// stringSet implements an ordered set based on a list. It implements flag.Value
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// to allow a set to be specified as a comma-separated list.
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type stringSet struct {
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s []string
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allowed *stringSet
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dirty bool // needs compaction if true
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all bool
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allowAll bool
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}
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func flagStringSet(name, def, allowed, usage string) *stringSet {
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ss := &stringSet{}
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if allowed != "" {
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usage += fmt.Sprintf(" (allowed values: any of %s)", allowed)
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ss.allowed = &stringSet{}
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failOnError(ss.allowed.Set(allowed))
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}
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ss.Set(def)
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flag.Var(ss, name, usage)
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return ss
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}
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func flagStringSetAllowAll(name, def, allowed, usage string) *stringSet {
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ss := &stringSet{allowAll: true}
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if allowed == "" {
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flag.Var(ss, name, usage+fmt.Sprintf(` Use "all" to select all.`))
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} else {
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ss.allowed = &stringSet{}
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failOnError(ss.allowed.Set(allowed))
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flag.Var(ss, name, usage+fmt.Sprintf(` (allowed values: "all" or any of %s)`, allowed))
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}
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ss.Set(def)
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return ss
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}
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func (ss stringSet) Len() int {
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return len(ss.s)
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}
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func (ss stringSet) String() string {
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return strings.Join(ss.s, ",")
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}
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func (ss *stringSet) Set(s string) error {
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if ss.allowAll && s == "all" {
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ss.s = nil
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ss.all = true
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return nil
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}
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ss.s = ss.s[:0]
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for _, s := range strings.Split(s, ",") {
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if s := strings.TrimSpace(s); s != "" {
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if ss.allowed != nil && !ss.allowed.contains(s) {
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return fmt.Errorf("unsupported value %q; must be one of %s", s, ss.allowed)
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}
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ss.add(s)
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}
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}
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ss.compact()
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return nil
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}
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func (ss *stringSet) add(s string) {
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ss.s = append(ss.s, s)
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ss.dirty = true
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}
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func (ss *stringSet) values() []string {
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ss.compact()
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return ss.s
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}
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func (ss *stringSet) contains(s string) bool {
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if ss.all {
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return true
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}
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for _, v := range ss.s {
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if v == s {
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return true
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}
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}
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return false
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}
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func (ss *stringSet) compact() {
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if !ss.dirty {
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return
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}
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a := ss.s
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sort.Strings(a)
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k := 0
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for i := 1; i < len(a); i++ {
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if a[k] != a[i] {
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a[k+1] = a[i]
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k++
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}
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}
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ss.s = a[:k+1]
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ss.dirty = false
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}
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func skipLang(l string) bool {
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if include.Len() > 0 {
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return !include.contains(l)
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}
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return exclude.contains(l)
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}
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func skipAlt(a string) bool {
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if *draft && a == "proposed" {
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return false
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}
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if *short && a == "short" {
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return false
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}
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return true
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}
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func failOnError(e error) {
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if e != nil {
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@ -44,31 +185,55 @@ func failOnError(e error) {
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}
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}
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// openReader opens the url or file given by url and returns it as an io.ReadCloser
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// openReader opens the URL or file given by url and returns it as an io.ReadCloser
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// or nil on error.
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func openReader(url string) (io.ReadCloser, error) {
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func openReader(url *string) (io.ReadCloser, error) {
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if *localFiles {
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pwd, _ := os.Getwd()
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url = "file://" + path.Join(pwd, path.Base(url))
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*url = "file://" + path.Join(pwd, path.Base(*url))
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}
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t := &http.Transport{}
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t.RegisterProtocol("file", http.NewFileTransport(http.Dir("/")))
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c := &http.Client{Transport: t}
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resp, err := c.Get(url)
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resp, err := c.Get(*url)
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if err != nil {
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return nil, err
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}
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if resp.StatusCode != 200 {
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return nil, fmt.Errorf(`bad GET status for "%s": %s`, url, resp.Status)
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return nil, fmt.Errorf(`bad GET status for "%s": %s`, *url, resp.Status)
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}
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return resp.Body, nil
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}
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func openArchive(url *string) *zip.Reader {
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f, err := openReader(url)
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failOnError(err)
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buffer, err := ioutil.ReadAll(f)
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f.Close()
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failOnError(err)
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archive, err := zip.NewReader(bytes.NewReader(buffer), int64(len(buffer)))
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failOnError(err)
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return archive
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}
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// parseUCA parses a Default Unicode Collation Element Table of the format
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// specified in http://www.unicode.org/reports/tr10/#File_Format.
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// It returns the variable top.
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func parseUCA(builder *build.Builder) {
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r, err := openReader(*ducet)
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var r io.ReadCloser
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var err error
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if strings.HasSuffix(*root, ".zip") {
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for _, f := range openArchive(root).File {
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if strings.HasSuffix(f.Name, "allkeys_CLDR.txt") {
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r, err = f.Open()
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}
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}
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if r == nil {
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err = fmt.Errorf("file allkeys_CLDR.txt not found in archive %q", *root)
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}
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} else {
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r, err = openReader(root)
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}
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failOnError(err)
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defer r.Close()
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input := bufio.NewReader(r)
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@ -147,30 +312,350 @@ func convHex(line int, s string) int {
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var testInput = stringSet{}
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type stringSet struct {
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set []string
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// LDML holds all collation information parsed from an LDML XML file.
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// The format of these files is defined in http://unicode.org/reports/tr35/.
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type LDML struct {
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XMLName xml.Name `xml:"ldml"`
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Language Attr `xml:"identity>language"`
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Territory Attr `xml:"identity>territory"`
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Chars *struct {
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ExemplarCharacters []AttrValue `xml:"exemplarCharacters"`
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MoreInformaton string `xml:"moreInformation,omitempty"`
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} `xml:"characters"`
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Default Attr `xml:"collations>default"`
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Collations []Collation `xml:"collations>collation"`
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}
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func (ss *stringSet) add(s string) {
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ss.set = append(ss.set, s)
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type Attr struct {
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XMLName xml.Name
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Attr string `xml:"type,attr"`
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}
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func (ss *stringSet) values() []string {
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ss.compact()
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return ss.set
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func (t Attr) String() string {
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return t.Attr
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}
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func (ss *stringSet) compact() {
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a := ss.set
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sort.Strings(a)
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k := 0
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for i := 1; i < len(a); i++ {
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if a[k] != a[i] {
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a[k+1] = a[i]
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k++
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type AttrValue struct {
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Type string `xml:"type,attr"`
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Key string `xml:"key,attr,omitempty"`
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Draft string `xml:"draft,attr,omitempty"`
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Value string `xml:",innerxml"`
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}
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type Collation struct {
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Type string `xml:"type,attr"`
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Alt string `xml:"alt,attr"`
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SuppressContraction string `xml:"suppress_contractions,omitempty"`
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Settings *Settings `xml:"settings"`
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Optimize string `xml:"optimize"`
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Rules Rules `xml:"rules"`
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}
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type Optimize struct {
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XMLName xml.Name `xml:"optimize"`
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Data string `xml:"chardata"`
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}
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type Suppression struct {
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XMLName xml.Name `xml:"suppress_contractions"`
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Data string `xml:"chardata"`
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}
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type Settings struct {
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Strength string `xml:"strenght,attr,omitempty"`
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Backwards string `xml:"backwards,attr,omitempty"`
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Normalization string `xml:"normalization,attr,omitempty"`
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CaseLevel string `xml:"caseLevel,attr,omitempty"`
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CaseFirst string `xml:"caseFirst,attr,omitempty"`
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HiraganaQuarternary string `xml:"hiraganaQuartenary,attr,omitempty"`
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Numeric string `xml:"numeric,attr,omitempty"`
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VariableTop string `xml:"variableTop,attr,omitempty"`
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}
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type Rules struct {
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XMLName xml.Name `xml:"rules"`
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Any []RuleElem `xml:",any"`
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}
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type RuleElem struct {
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XMLName xml.Name
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Value string `xml:",innerxml"`
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Before string `xml:"before,attr"`
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Any []RuleElem `xml:",any"` // for <x> elements
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}
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var charRe = regexp.MustCompile(`&#x([0-9A-F]*);`)
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var tagRe = regexp.MustCompile(`<([a-z_]*) */>`)
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func (r *RuleElem) rewrite() {
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// Convert hexadecimal Unicode codepoint notation to a string.
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if m := charRe.FindAllStringSubmatch(r.Value, -1); m != nil {
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runes := []rune{}
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for _, sa := range m {
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runes = append(runes, rune(convHex(-1, sa[1])))
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}
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r.Value = string(runes)
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}
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// Strip spaces from reset positions.
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if m := tagRe.FindStringSubmatch(r.Value); m != nil {
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r.Value = fmt.Sprintf("<%s/>", m[1])
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}
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for _, rr := range r.Any {
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rr.rewrite()
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}
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}
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func decodeXML(f *zip.File) *LDML {
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r, err := f.Open()
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failOnError(err)
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d := xml.NewDecoder(r)
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var x LDML
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err = d.Decode(&x)
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failOnError(err)
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return &x
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}
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var mainLocales = []string{}
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// charsets holds a list of exemplar characters per category.
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type charSets map[string][]string
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func (p charSets) fprint(w io.Writer) {
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fmt.Fprintln(w, "[exN]string{")
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for i, k := range []string{"", "contractions", "punctuation", "auxiliary", "currencySymbol", "index"} {
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if set := p[k]; len(set) != 0 {
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fmt.Fprintf(w, "\t\t%d: %q,\n", i, strings.Join(set, " "))
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}
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}
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fmt.Fprintln(w, "\t},")
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}
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var localeChars = make(map[string]charSets)
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const exemplarHeader = `
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type exemplarType int
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const (
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exCharacters exemplarType = iota
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exContractions
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exPunctuation
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exAuxiliary
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exCurrency
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exIndex
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exN
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)
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`
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func printExemplarCharacters(w io.Writer) {
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fmt.Fprintln(w, exemplarHeader)
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fmt.Fprintln(w, "var exemplarCharacters = map[string][exN]string{")
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for _, loc := range mainLocales {
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fmt.Fprintf(w, "\t%q: ", loc)
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localeChars[loc].fprint(w)
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}
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fmt.Fprintln(w, "}")
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}
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var mainRe = regexp.MustCompile(`.*/main/(.*)\.xml`)
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// parseMain parses XML files in the main directory of the CLDR core.zip file.
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func parseMain() {
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for _, f := range openArchive(cldr).File {
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if m := mainRe.FindStringSubmatch(f.Name); m != nil {
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locale := m[1]
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x := decodeXML(f)
|
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if skipLang(x.Language.Attr) {
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continue
|
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}
|
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if x.Chars != nil {
|
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for _, ec := range x.Chars.ExemplarCharacters {
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if ec.Draft != "" {
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continue
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}
|
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if _, ok := localeChars[locale]; !ok {
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mainLocales = append(mainLocales, locale)
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localeChars[locale] = make(charSets)
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}
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localeChars[locale][ec.Type] = parseCharacters(ec.Value)
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}
|
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}
|
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}
|
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}
|
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}
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|
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func parseCharacters(chars string) []string {
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parseSingle := func(s string) (r rune, tail string, escaped bool) {
|
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if s[0] == '\\' {
|
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if s[1] == 'u' || s[1] == 'U' {
|
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r, _, tail, err := strconv.UnquoteChar(s, 0)
|
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failOnError(err)
|
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return r, tail, false
|
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} else if strings.HasPrefix(s[1:], "&") {
|
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return '&', s[6:], false
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}
|
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return rune(s[1]), s[2:], true
|
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} else if strings.HasPrefix(s, """) {
|
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return '"', s[6:], false
|
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}
|
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r, sz := utf8.DecodeRuneInString(s)
|
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return r, s[sz:], false
|
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}
|
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chars = strings.Trim(chars, "[ ]")
|
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list := []string{}
|
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var r, last, end rune
|
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for len(chars) > 0 {
|
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if chars[0] == '{' { // character sequence
|
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buf := []rune{}
|
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for chars = chars[1:]; len(chars) > 0; {
|
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r, chars, _ = parseSingle(chars)
|
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if r == '}' {
|
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break
|
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}
|
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if r == ' ' {
|
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log.Fatalf("space not supported in sequence %q", chars)
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}
|
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buf = append(buf, r)
|
||||
}
|
||||
list = append(list, string(buf))
|
||||
last = 0
|
||||
} else { // single character
|
||||
escaped := false
|
||||
r, chars, escaped = parseSingle(chars)
|
||||
if r != ' ' {
|
||||
if r == '-' && !escaped {
|
||||
if last == 0 {
|
||||
log.Fatal("'-' should be preceded by a character")
|
||||
}
|
||||
end, chars, _ = parseSingle(chars)
|
||||
for ; last <= end; last++ {
|
||||
list = append(list, string(last))
|
||||
}
|
||||
last = 0
|
||||
} else {
|
||||
list = append(list, string(r))
|
||||
last = r
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return list
|
||||
}
|
||||
|
||||
var fileRe = regexp.MustCompile(`.*/collation/(.*)\.xml`)
|
||||
|
||||
// parseCollation parses XML files in the collation directory of the CLDR core.zip file.
|
||||
func parseCollation(b *build.Builder) {
|
||||
for _, f := range openArchive(cldr).File {
|
||||
if m := fileRe.FindStringSubmatch(f.Name); m != nil {
|
||||
lang := m[1]
|
||||
x := decodeXML(f)
|
||||
if skipLang(x.Language.Attr) {
|
||||
continue
|
||||
}
|
||||
def := "standard"
|
||||
if x.Default.Attr != "" {
|
||||
def = x.Default.Attr
|
||||
}
|
||||
todo := make(map[string]Collation)
|
||||
for _, c := range x.Collations {
|
||||
if c.Type != def && !types.contains(c.Type) {
|
||||
continue
|
||||
}
|
||||
if c.Alt != "" && skipAlt(c.Alt) {
|
||||
continue
|
||||
}
|
||||
for j, _ := range c.Rules.Any {
|
||||
c.Rules.Any[j].rewrite()
|
||||
}
|
||||
locale := lang
|
||||
if c.Type != def {
|
||||
locale += "_u_co_" + c.Type
|
||||
}
|
||||
_, exists := todo[locale]
|
||||
if c.Alt != "" || !exists {
|
||||
todo[locale] = c
|
||||
}
|
||||
}
|
||||
for _, c := range x.Collations {
|
||||
locale := lang
|
||||
if c.Type != def {
|
||||
locale += "_u_co_" + c.Type
|
||||
}
|
||||
if d, ok := todo[locale]; ok && d.Alt == c.Alt {
|
||||
insertCollation(b, locale, &c)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
var lmap = map[byte]collate.Level{
|
||||
'p': collate.Primary,
|
||||
's': collate.Secondary,
|
||||
't': collate.Tertiary,
|
||||
'i': collate.Identity,
|
||||
}
|
||||
|
||||
// cldrIndex is a Unicode-reserved sentinel value used.
|
||||
// We ignore any rule that starts with this rune.
|
||||
// See http://unicode.org/reports/tr35/#Collation_Elements for details.
|
||||
const cldrIndex = 0xFDD0
|
||||
|
||||
func insertTailoring(t *build.Tailoring, r RuleElem, context, extend string) {
|
||||
switch l := r.XMLName.Local; l {
|
||||
case "p", "s", "t", "i":
|
||||
if []rune(r.Value)[0] != cldrIndex {
|
||||
str := context + r.Value
|
||||
if *test {
|
||||
testInput.add(str)
|
||||
}
|
||||
err := t.Insert(lmap[l[0]], str, extend)
|
||||
failOnError(err)
|
||||
}
|
||||
case "pc", "sc", "tc", "ic":
|
||||
level := lmap[l[0]]
|
||||
for _, s := range r.Value {
|
||||
str := context + string(s)
|
||||
if *test {
|
||||
testInput.add(str)
|
||||
}
|
||||
err := t.Insert(level, str, extend)
|
||||
failOnError(err)
|
||||
}
|
||||
default:
|
||||
log.Fatalf("unsupported tag: %q", l)
|
||||
}
|
||||
}
|
||||
|
||||
func insertCollation(builder *build.Builder, locale string, c *Collation) {
|
||||
t := builder.Tailoring(locale)
|
||||
for _, r := range c.Rules.Any {
|
||||
switch r.XMLName.Local {
|
||||
case "reset":
|
||||
if r.Before == "" {
|
||||
failOnError(t.SetAnchor(r.Value))
|
||||
} else {
|
||||
failOnError(t.SetAnchorBefore(r.Value))
|
||||
}
|
||||
case "x":
|
||||
var context, extend string
|
||||
for _, r1 := range r.Any {
|
||||
switch r1.XMLName.Local {
|
||||
case "context":
|
||||
context = r1.Value
|
||||
case "extend":
|
||||
extend = r1.Value
|
||||
}
|
||||
}
|
||||
for _, r1 := range r.Any {
|
||||
if t := r1.XMLName.Local; t == "context" || t == "extend" {
|
||||
continue
|
||||
}
|
||||
insertTailoring(t, r1, context, extend)
|
||||
}
|
||||
default:
|
||||
insertTailoring(t, r, "", "")
|
||||
}
|
||||
}
|
||||
ss.set = a[:k+1]
|
||||
}
|
||||
|
||||
func testCollator(c *collate.Collator) {
|
||||
@ -214,7 +699,16 @@ func printCollators(c *collate.Collator) {
|
||||
func main() {
|
||||
flag.Parse()
|
||||
b := build.NewBuilder()
|
||||
parseUCA(b)
|
||||
if *root != "" {
|
||||
parseUCA(b)
|
||||
}
|
||||
if *cldr != "" {
|
||||
if tables.contains("chars") {
|
||||
parseMain()
|
||||
}
|
||||
parseCollation(b)
|
||||
}
|
||||
|
||||
c, err := b.Build()
|
||||
failOnError(err)
|
||||
|
||||
@ -222,18 +716,24 @@ func main() {
|
||||
testCollator(c)
|
||||
} else {
|
||||
fmt.Println("// Generated by running")
|
||||
fmt.Printf("// maketables --ducet=%s\n", *ducet)
|
||||
fmt.Printf("// maketables -root=%s -cldr=%s\n", *root, *cldr)
|
||||
fmt.Println("// DO NOT EDIT")
|
||||
fmt.Println("// TODO: implement more compact representation for sparse blocks.")
|
||||
if *tags != "" {
|
||||
fmt.Printf("// +build %s\n", *tags)
|
||||
}
|
||||
fmt.Println("")
|
||||
fmt.Println("package collate")
|
||||
fmt.Println("")
|
||||
fmt.Println(`import "exp/norm"`)
|
||||
fmt.Println("")
|
||||
|
||||
printCollators(c)
|
||||
|
||||
_, err = b.Print(os.Stdout)
|
||||
failOnError(err)
|
||||
fmt.Printf("package %s\n", *pkg)
|
||||
if tables.contains("collate") {
|
||||
fmt.Println("")
|
||||
fmt.Println(`import "exp/norm"`)
|
||||
fmt.Println("")
|
||||
printCollators(c)
|
||||
_, err = b.Print(os.Stdout)
|
||||
failOnError(err)
|
||||
}
|
||||
if tables.contains("chars") {
|
||||
printExemplarCharacters(os.Stdout)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
// Generated by running
|
||||
// maketables --ducet=http://unicode.org/Public/UCA/6.0.0/allkeys.txt
|
||||
// maketables -root=file:///Users/mpvl/Projects/go/hg/gopub/src/pkg/exp/locale/collate/allkeys.txt -cldr=file:///Users/mpvl/Projects/go/hg/gopub/src/pkg/exp/locale/collate/core.zip
|
||||
// DO NOT EDIT
|
||||
// TODO: implement more compact representation for sparse blocks.
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user