VOL-1967 move api-server to separate repository
Change-Id: I21b85be74205805be15f8a85e53a903d16785671
diff --git a/vendor/golang.org/x/text/internal/language/compose.go b/vendor/golang.org/x/text/internal/language/compose.go
new file mode 100644
index 0000000..4ae78e0
--- /dev/null
+++ b/vendor/golang.org/x/text/internal/language/compose.go
@@ -0,0 +1,167 @@
+// Copyright 2018 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.
+
+package language
+
+import (
+ "sort"
+ "strings"
+)
+
+// A Builder allows constructing a Tag from individual components.
+// Its main user is Compose in the top-level language package.
+type Builder struct {
+ Tag Tag
+
+ private string // the x extension
+ variants []string
+ extensions []string
+}
+
+// Make returns a new Tag from the current settings.
+func (b *Builder) Make() Tag {
+ t := b.Tag
+
+ if len(b.extensions) > 0 || len(b.variants) > 0 {
+ sort.Sort(sortVariants(b.variants))
+ sort.Strings(b.extensions)
+
+ if b.private != "" {
+ b.extensions = append(b.extensions, b.private)
+ }
+ n := maxCoreSize + tokenLen(b.variants...) + tokenLen(b.extensions...)
+ buf := make([]byte, n)
+ p := t.genCoreBytes(buf)
+ t.pVariant = byte(p)
+ p += appendTokens(buf[p:], b.variants...)
+ t.pExt = uint16(p)
+ p += appendTokens(buf[p:], b.extensions...)
+ t.str = string(buf[:p])
+ // We may not always need to remake the string, but when or when not
+ // to do so is rather tricky.
+ scan := makeScanner(buf[:p])
+ t, _ = parse(&scan, "")
+ return t
+
+ } else if b.private != "" {
+ t.str = b.private
+ t.RemakeString()
+ }
+ return t
+}
+
+// SetTag copies all the settings from a given Tag. Any previously set values
+// are discarded.
+func (b *Builder) SetTag(t Tag) {
+ b.Tag.LangID = t.LangID
+ b.Tag.RegionID = t.RegionID
+ b.Tag.ScriptID = t.ScriptID
+ // TODO: optimize
+ b.variants = b.variants[:0]
+ if variants := t.Variants(); variants != "" {
+ for _, vr := range strings.Split(variants[1:], "-") {
+ b.variants = append(b.variants, vr)
+ }
+ }
+ b.extensions, b.private = b.extensions[:0], ""
+ for _, e := range t.Extensions() {
+ b.AddExt(e)
+ }
+}
+
+// AddExt adds extension e to the tag. e must be a valid extension as returned
+// by Tag.Extension. If the extension already exists, it will be discarded,
+// except for a -u extension, where non-existing key-type pairs will added.
+func (b *Builder) AddExt(e string) {
+ if e[0] == 'x' {
+ if b.private == "" {
+ b.private = e
+ }
+ return
+ }
+ for i, s := range b.extensions {
+ if s[0] == e[0] {
+ if e[0] == 'u' {
+ b.extensions[i] += e[1:]
+ }
+ return
+ }
+ }
+ b.extensions = append(b.extensions, e)
+}
+
+// SetExt sets the extension e to the tag. e must be a valid extension as
+// returned by Tag.Extension. If the extension already exists, it will be
+// overwritten, except for a -u extension, where the individual key-type pairs
+// will be set.
+func (b *Builder) SetExt(e string) {
+ if e[0] == 'x' {
+ b.private = e
+ return
+ }
+ for i, s := range b.extensions {
+ if s[0] == e[0] {
+ if e[0] == 'u' {
+ b.extensions[i] = e + s[1:]
+ } else {
+ b.extensions[i] = e
+ }
+ return
+ }
+ }
+ b.extensions = append(b.extensions, e)
+}
+
+// AddVariant adds any number of variants.
+func (b *Builder) AddVariant(v ...string) {
+ for _, v := range v {
+ if v != "" {
+ b.variants = append(b.variants, v)
+ }
+ }
+}
+
+// ClearVariants removes any variants previously added, including those
+// copied from a Tag in SetTag.
+func (b *Builder) ClearVariants() {
+ b.variants = b.variants[:0]
+}
+
+// ClearExtensions removes any extensions previously added, including those
+// copied from a Tag in SetTag.
+func (b *Builder) ClearExtensions() {
+ b.private = ""
+ b.extensions = b.extensions[:0]
+}
+
+func tokenLen(token ...string) (n int) {
+ for _, t := range token {
+ n += len(t) + 1
+ }
+ return
+}
+
+func appendTokens(b []byte, token ...string) int {
+ p := 0
+ for _, t := range token {
+ b[p] = '-'
+ copy(b[p+1:], t)
+ p += 1 + len(t)
+ }
+ return p
+}
+
+type sortVariants []string
+
+func (s sortVariants) Len() int {
+ return len(s)
+}
+
+func (s sortVariants) Swap(i, j int) {
+ s[j], s[i] = s[i], s[j]
+}
+
+func (s sortVariants) Less(i, j int) bool {
+ return variantIndex[s[i]] < variantIndex[s[j]]
+}