From 32dd62da990484cf15db8eb7a14bd646bc0fda8a Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Sat, 6 Jul 2019 18:56:43 +0200 Subject: switch to go.mod --- .../golang.org/x/text/internal/language/compose.go | 167 +++++++++++++++++++++ 1 file changed, 167 insertions(+) create mode 100644 vendor/golang.org/x/text/internal/language/compose.go (limited to 'vendor/golang.org/x/text/internal/language/compose.go') 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]] +} -- cgit v1.2.3