diff options
Diffstat (limited to 'vendor/golang.org/x/text/internal/language/language.go')
| -rw-r--r-- | vendor/golang.org/x/text/internal/language/language.go | 90 |
1 files changed, 43 insertions, 47 deletions
diff --git a/vendor/golang.org/x/text/internal/language/language.go b/vendor/golang.org/x/text/internal/language/language.go index 1e74d1af..f41aedcf 100644 --- a/vendor/golang.org/x/text/internal/language/language.go +++ b/vendor/golang.org/x/text/internal/language/language.go @@ -303,9 +303,17 @@ func (t Tag) Extensions() []string { // are of the allowed values defined for the Unicode locale extension ('u') in // https://www.unicode.org/reports/tr35/#Unicode_Language_and_Locale_Identifiers. // TypeForKey will traverse the inheritance chain to get the correct value. +// +// If there are multiple types associated with a key, only the first will be +// returned. If there is no type associated with a key, it returns the empty +// string. func (t Tag) TypeForKey(key string) string { - if start, end, _ := t.findTypeForKey(key); end != start { - return t.str[start:end] + if _, start, end, _ := t.findTypeForKey(key); end != start { + s := t.str[start:end] + if p := strings.IndexByte(s, '-'); p >= 0 { + s = s[:p] + } + return s } return "" } @@ -329,13 +337,13 @@ func (t Tag) SetTypeForKey(key, value string) (Tag, error) { // Remove the setting if value is "". if value == "" { - start, end, _ := t.findTypeForKey(key) - if start != end { - // Remove key tag and leading '-'. - start -= 4 - + start, sep, end, _ := t.findTypeForKey(key) + if start != sep { // Remove a possible empty extension. - if (end == len(t.str) || t.str[end+2] == '-') && t.str[start-2] == '-' { + switch { + case t.str[start-2] != '-': // has previous elements. + case end == len(t.str), // end of string + end+2 < len(t.str) && t.str[end+2] == '-': // end of extension start -= 2 } if start == int(t.pVariant) && end == len(t.str) { @@ -381,14 +389,14 @@ func (t Tag) SetTypeForKey(key, value string) (Tag, error) { t.str = string(buf[:uStart+len(b)]) } else { s := t.str - start, end, hasExt := t.findTypeForKey(key) - if start == end { + start, sep, end, hasExt := t.findTypeForKey(key) + if start == sep { if hasExt { b = b[2:] } - t.str = fmt.Sprintf("%s-%s%s", s[:start], b, s[end:]) + t.str = fmt.Sprintf("%s-%s%s", s[:sep], b, s[end:]) } else { - t.str = fmt.Sprintf("%s%s%s", s[:start], value, s[end:]) + t.str = fmt.Sprintf("%s-%s%s", s[:start+3], value, s[end:]) } } return t, nil @@ -399,10 +407,10 @@ func (t Tag) SetTypeForKey(key, value string) (Tag, error) { // wasn't found. The hasExt return value reports whether an -u extension was present. // Note: the extensions are typically very small and are likely to contain // only one key-type pair. -func (t Tag) findTypeForKey(key string) (start, end int, hasExt bool) { +func (t Tag) findTypeForKey(key string) (start, sep, end int, hasExt bool) { p := int(t.pExt) if len(key) != 2 || p == len(t.str) || p == 0 { - return p, p, false + return p, p, p, false } s := t.str @@ -410,10 +418,10 @@ func (t Tag) findTypeForKey(key string) (start, end int, hasExt bool) { for p++; s[p] != 'u'; p++ { if s[p] > 'u' { p-- - return p, p, false + return p, p, p, false } if p = nextExtension(s, p); p == len(s) { - return len(s), len(s), false + return len(s), len(s), len(s), false } } // Proceed to the hyphen following the extension name. @@ -424,40 +432,28 @@ func (t Tag) findTypeForKey(key string) (start, end int, hasExt bool) { // Iterate over keys until we get the end of a section. for { - // p points to the hyphen preceding the current token. - if p3 := p + 3; s[p3] == '-' { - // Found a key. - // Check whether we just processed the key that was requested. - if curKey == key { - return start, p, true - } - // Set to the next key and continue scanning type tokens. - curKey = s[p+1 : p3] - if curKey > key { - return p, p, true - } - // Start of the type token sequence. - start = p + 4 - // A type is at least 3 characters long. - p += 7 // 4 + 3 - } else { - // Attribute or type, which is at least 3 characters long. - p += 4 - } - // p points past the third character of a type or attribute. - max := p + 5 // maximum length of token plus hyphen. - if len(s) < max { - max = len(s) + end = p + for p++; p < len(s) && s[p] != '-'; p++ { } - for ; p < max && s[p] != '-'; p++ { + n := p - end - 1 + if n <= 2 && curKey == key { + if sep < end { + sep++ + } + return start, sep, end, true } - // Bail if we have exhausted all tokens or if the next token starts - // a new extension. - if p == len(s) || s[p+2] == '-' { - if curKey == key { - return start, p, true + switch n { + case 0, // invalid string + 1: // next extension + return end, end, end, true + case 2: + // next key + curKey = s[end+1 : p] + if curKey > key { + return end, end, end, true } - return p, p, true + start = end + sep = p } } } |