From b1247d2d0d51108c910a73891ff3116e5f032ab1 Mon Sep 17 00:00:00 2001 From: "Kali Kaneko (leap communications)" Date: Sat, 12 Jan 2019 18:39:45 +0100 Subject: [pkg] all your deps are vendored to us --- vendor/golang.org/x/text/language/parse.go | 228 +++++++++++++++++++++++++++++ 1 file changed, 228 insertions(+) create mode 100644 vendor/golang.org/x/text/language/parse.go (limited to 'vendor/golang.org/x/text/language/parse.go') diff --git a/vendor/golang.org/x/text/language/parse.go b/vendor/golang.org/x/text/language/parse.go new file mode 100644 index 0000000..11acfd8 --- /dev/null +++ b/vendor/golang.org/x/text/language/parse.go @@ -0,0 +1,228 @@ +// Copyright 2013 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 ( + "errors" + "strconv" + "strings" + + "golang.org/x/text/internal/language" +) + +// ValueError is returned by any of the parsing functions when the +// input is well-formed but the respective subtag is not recognized +// as a valid value. +type ValueError interface { + error + + // Subtag returns the subtag for which the error occurred. + Subtag() string +} + +// Parse parses the given BCP 47 string and returns a valid Tag. If parsing +// failed it returns an error and any part of the tag that could be parsed. +// If parsing succeeded but an unknown value was found, it returns +// ValueError. The Tag returned in this case is just stripped of the unknown +// value. All other values are preserved. It accepts tags in the BCP 47 format +// and extensions to this standard defined in +// https://www.unicode.org/reports/tr35/#Unicode_Language_and_Locale_Identifiers. +// The resulting tag is canonicalized using the default canonicalization type. +func Parse(s string) (t Tag, err error) { + return Default.Parse(s) +} + +// Parse parses the given BCP 47 string and returns a valid Tag. If parsing +// failed it returns an error and any part of the tag that could be parsed. +// If parsing succeeded but an unknown value was found, it returns +// ValueError. The Tag returned in this case is just stripped of the unknown +// value. All other values are preserved. It accepts tags in the BCP 47 format +// and extensions to this standard defined in +// https://www.unicode.org/reports/tr35/#Unicode_Language_and_Locale_Identifiers. +// The resulting tag is canonicalized using the canonicalization type c. +func (c CanonType) Parse(s string) (t Tag, err error) { + tt, err := language.Parse(s) + if err != nil { + return makeTag(tt), err + } + tt, changed := canonicalize(c, tt) + if changed { + tt.RemakeString() + } + return makeTag(tt), err +} + +// Compose creates a Tag from individual parts, which may be of type Tag, Base, +// Script, Region, Variant, []Variant, Extension, []Extension or error. If a +// Base, Script or Region or slice of type Variant or Extension is passed more +// than once, the latter will overwrite the former. Variants and Extensions are +// accumulated, but if two extensions of the same type are passed, the latter +// will replace the former. For -u extensions, though, the key-type pairs are +// added, where later values overwrite older ones. A Tag overwrites all former +// values and typically only makes sense as the first argument. The resulting +// tag is returned after canonicalizing using the Default CanonType. If one or +// more errors are encountered, one of the errors is returned. +func Compose(part ...interface{}) (t Tag, err error) { + return Default.Compose(part...) +} + +// Compose creates a Tag from individual parts, which may be of type Tag, Base, +// Script, Region, Variant, []Variant, Extension, []Extension or error. If a +// Base, Script or Region or slice of type Variant or Extension is passed more +// than once, the latter will overwrite the former. Variants and Extensions are +// accumulated, but if two extensions of the same type are passed, the latter +// will replace the former. For -u extensions, though, the key-type pairs are +// added, where later values overwrite older ones. A Tag overwrites all former +// values and typically only makes sense as the first argument. The resulting +// tag is returned after canonicalizing using CanonType c. If one or more errors +// are encountered, one of the errors is returned. +func (c CanonType) Compose(part ...interface{}) (t Tag, err error) { + var b language.Builder + if err = update(&b, part...); err != nil { + return und, err + } + b.Tag, _ = canonicalize(c, b.Tag) + return makeTag(b.Make()), err +} + +var errInvalidArgument = errors.New("invalid Extension or Variant") + +func update(b *language.Builder, part ...interface{}) (err error) { + for _, x := range part { + switch v := x.(type) { + case Tag: + b.SetTag(v.tag()) + case Base: + b.Tag.LangID = v.langID + case Script: + b.Tag.ScriptID = v.scriptID + case Region: + b.Tag.RegionID = v.regionID + case Variant: + if v.variant == "" { + err = errInvalidArgument + break + } + b.AddVariant(v.variant) + case Extension: + if v.s == "" { + err = errInvalidArgument + break + } + b.SetExt(v.s) + case []Variant: + b.ClearVariants() + for _, v := range v { + b.AddVariant(v.variant) + } + case []Extension: + b.ClearExtensions() + for _, e := range v { + b.SetExt(e.s) + } + // TODO: support parsing of raw strings based on morphology or just extensions? + case error: + if v != nil { + err = v + } + } + } + return +} + +var errInvalidWeight = errors.New("ParseAcceptLanguage: invalid weight") + +// ParseAcceptLanguage parses the contents of an Accept-Language header as +// defined in http://www.ietf.org/rfc/rfc2616.txt and returns a list of Tags and +// a list of corresponding quality weights. It is more permissive than RFC 2616 +// and may return non-nil slices even if the input is not valid. +// The Tags will be sorted by highest weight first and then by first occurrence. +// Tags with a weight of zero will be dropped. An error will be returned if the +// input could not be parsed. +func ParseAcceptLanguage(s string) (tag []Tag, q []float32, err error) { + var entry string + for s != "" { + if entry, s = split(s, ','); entry == "" { + continue + } + + entry, weight := split(entry, ';') + + // Scan the language. + t, err := Parse(entry) + if err != nil { + id, ok := acceptFallback[entry] + if !ok { + return nil, nil, err + } + t = makeTag(language.Tag{LangID: id}) + } + + // Scan the optional weight. + w := 1.0 + if weight != "" { + weight = consume(weight, 'q') + weight = consume(weight, '=') + // consume returns the empty string when a token could not be + // consumed, resulting in an error for ParseFloat. + if w, err = strconv.ParseFloat(weight, 32); err != nil { + return nil, nil, errInvalidWeight + } + // Drop tags with a quality weight of 0. + if w <= 0 { + continue + } + } + + tag = append(tag, t) + q = append(q, float32(w)) + } + sortStable(&tagSort{tag, q}) + return tag, q, nil +} + +// consume removes a leading token c from s and returns the result or the empty +// string if there is no such token. +func consume(s string, c byte) string { + if s == "" || s[0] != c { + return "" + } + return strings.TrimSpace(s[1:]) +} + +func split(s string, c byte) (head, tail string) { + if i := strings.IndexByte(s, c); i >= 0 { + return strings.TrimSpace(s[:i]), strings.TrimSpace(s[i+1:]) + } + return strings.TrimSpace(s), "" +} + +// Add hack mapping to deal with a small number of cases that occur +// in Accept-Language (with reasonable frequency). +var acceptFallback = map[string]language.Language{ + "english": _en, + "deutsch": _de, + "italian": _it, + "french": _fr, + "*": _mul, // defined in the spec to match all languages. +} + +type tagSort struct { + tag []Tag + q []float32 +} + +func (s *tagSort) Len() int { + return len(s.q) +} + +func (s *tagSort) Less(i, j int) bool { + return s.q[i] > s.q[j] +} + +func (s *tagSort) Swap(i, j int) { + s.tag[i], s.tag[j] = s.tag[j], s.tag[i] + s.q[i], s.q[j] = s.q[j], s.q[i] +} -- cgit v1.2.3