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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "builtin/intl/LanguageTag.h"
#include "mozilla/intl/Locale.h"
#include "mozilla/Span.h"
#include "builtin/intl/StringAsciiChars.h"
#include "gc/Tracer.h"
#include "vm/JSContext.h"
namespace js {
namespace intl {
[[nodiscard]] bool ParseLocale(JSContext* cx, Handle<JSLinearString*> str,
mozilla::intl::Locale& result) {
if (StringIsAscii(str)) {
intl::StringAsciiChars chars(str);
if (!chars.init(cx)) {
return false;
}
if (mozilla::intl::LocaleParser::TryParse(chars, result).isOk()) {
return true;
}
}
if (UniqueChars localeChars = QuoteString(cx, str, '"')) {
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
JSMSG_INVALID_LANGUAGE_TAG, localeChars.get());
}
return false;
}
bool ParseStandaloneLanguageTag(Handle<JSLinearString*> str,
mozilla::intl::LanguageSubtag& result) {
// Tell the analysis the |IsStructurallyValidLanguageTag| function can't GC.
JS::AutoSuppressGCAnalysis nogc;
if (str->hasLatin1Chars()) {
if (!mozilla::intl::IsStructurallyValidLanguageTag<Latin1Char>(
str->latin1Range(nogc))) {
return false;
}
result.Set<Latin1Char>(str->latin1Range(nogc));
} else {
if (!mozilla::intl::IsStructurallyValidLanguageTag<char16_t>(
str->twoByteRange(nogc))) {
return false;
}
result.Set<char16_t>(str->twoByteRange(nogc));
}
return true;
}
bool ParseStandaloneScriptTag(Handle<JSLinearString*> str,
mozilla::intl::ScriptSubtag& result) {
// Tell the analysis the |IsStructurallyValidScriptTag| function can't GC.
JS::AutoSuppressGCAnalysis nogc;
if (str->hasLatin1Chars()) {
if (!mozilla::intl::IsStructurallyValidScriptTag<Latin1Char>(
str->latin1Range(nogc))) {
return false;
}
result.Set<Latin1Char>(str->latin1Range(nogc));
} else {
if (!mozilla::intl::IsStructurallyValidScriptTag<char16_t>(
str->twoByteRange(nogc))) {
return false;
}
result.Set<char16_t>(str->twoByteRange(nogc));
}
return true;
}
bool ParseStandaloneRegionTag(Handle<JSLinearString*> str,
mozilla::intl::RegionSubtag& result) {
// Tell the analysis the |IsStructurallyValidRegionTag| function can't GC.
JS::AutoSuppressGCAnalysis nogc;
if (str->hasLatin1Chars()) {
if (!mozilla::intl::IsStructurallyValidRegionTag<Latin1Char>(
str->latin1Range(nogc))) {
return false;
}
result.Set<Latin1Char>(str->latin1Range(nogc));
} else {
if (!mozilla::intl::IsStructurallyValidRegionTag<char16_t>(
str->twoByteRange(nogc))) {
return false;
}
result.Set<char16_t>(str->twoByteRange(nogc));
}
return true;
}
template <typename CharT>
static bool IsAsciiLowercaseAlpha(mozilla::Span<const CharT> span) {
// Tell the analysis the |std::all_of| function can't GC.
JS::AutoSuppressGCAnalysis nogc;
const CharT* ptr = span.data();
size_t length = span.size();
return std::all_of(ptr, ptr + length, mozilla::IsAsciiLowercaseAlpha<CharT>);
}
static bool IsAsciiLowercaseAlpha(JSLinearString* str) {
JS::AutoCheckCannotGC nogc;
if (str->hasLatin1Chars()) {
return IsAsciiLowercaseAlpha<Latin1Char>(str->latin1Range(nogc));
}
return IsAsciiLowercaseAlpha<char16_t>(str->twoByteRange(nogc));
}
template <typename CharT>
static bool IsAsciiAlpha(mozilla::Span<const CharT> span) {
// Tell the analysis the |std::all_of| function can't GC.
JS::AutoSuppressGCAnalysis nogc;
const CharT* ptr = span.data();
size_t length = span.size();
return std::all_of(ptr, ptr + length, mozilla::IsAsciiAlpha<CharT>);
}
static bool IsAsciiAlpha(JSLinearString* str) {
JS::AutoCheckCannotGC nogc;
if (str->hasLatin1Chars()) {
return IsAsciiAlpha<Latin1Char>(str->latin1Range(nogc));
}
return IsAsciiAlpha<char16_t>(str->twoByteRange(nogc));
}
JS::Result<JSString*> ParseStandaloneISO639LanguageTag(
JSContext* cx, Handle<JSLinearString*> str) {
// ISO-639 language codes contain either two or three characters.
size_t length = str->length();
if (length != 2 && length != 3) {
return nullptr;
}
// We can directly the return the input below if it's in the correct case.
bool isLowerCase = IsAsciiLowercaseAlpha(str);
if (!isLowerCase) {
// Must be an ASCII alpha string.
if (!IsAsciiAlpha(str)) {
return nullptr;
}
}
mozilla::intl::LanguageSubtag languageTag;
if (str->hasLatin1Chars()) {
JS::AutoCheckCannotGC nogc;
languageTag.Set<Latin1Char>(str->latin1Range(nogc));
} else {
JS::AutoCheckCannotGC nogc;
languageTag.Set<char16_t>(str->twoByteRange(nogc));
}
if (!isLowerCase) {
// The language subtag is canonicalized to lower case.
languageTag.ToLowerCase();
}
// Reject the input if the canonical tag contains more than just a single
// language subtag.
if (mozilla::intl::Locale::ComplexLanguageMapping(languageTag)) {
return nullptr;
}
// Take care to replace deprecated subtags with their preferred values.
JSString* result;
if (mozilla::intl::Locale::LanguageMapping(languageTag) || !isLowerCase) {
result = NewStringCopy<CanGC>(cx, languageTag.Span());
} else {
result = str;
}
if (!result) {
return cx->alreadyReportedOOM();
}
return result;
}
void js::intl::UnicodeExtensionKeyword::trace(JSTracer* trc) {
TraceRoot(trc, &type_, "UnicodeExtensionKeyword::type");
}
} // namespace intl
} // namespace js
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