1 files changed, 61 insertions, 0 deletions
diff --git a/js/src/builtin/intl/Locale.h b/js/src/builtin/intl/Locale.h
new file mode 100644
index 0000000000..93b618528a
--- /dev/null
+++ b/js/src/builtin/intl/Locale.h
@@ -0,0 +1,61 @@
+/* -*- 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/. */
+
+#ifndef builtin_intl_Locale_h
+#define builtin_intl_Locale_h
+
+#include <stdint.h>
+
+#include "js/Class.h"
+#include "vm/NativeObject.h"
+
+namespace js {
+
+class LocaleObject : public NativeObject {
+ public:
+  static const JSClass class_;
+  static const JSClass& protoClass_;
+
+  static constexpr uint32_t LANGUAGE_TAG_SLOT = 0;
+  static constexpr uint32_t BASENAME_SLOT = 1;
+  static constexpr uint32_t UNICODE_EXTENSION_SLOT = 2;
+  static constexpr uint32_t SLOT_COUNT = 3;
+
+  /**
+   * Returns the complete language tag, including any extensions and privateuse
+   * subtags.
+   */
+  JSString* languageTag() const {
+    return getFixedSlot(LANGUAGE_TAG_SLOT).toString();
+  }
+
+  /**
+   * Returns the basename subtags, i.e. excluding any extensions and privateuse
+   * subtags.
+   */
+  JSString* baseName() const { return getFixedSlot(BASENAME_SLOT).toString(); }
+
+  const Value& unicodeExtension() const {
+    return getFixedSlot(UNICODE_EXTENSION_SLOT);
+  }
+
+ private:
+  static const ClassSpec classSpec_;
+};
+
+[[nodiscard]] extern bool intl_ValidateAndCanonicalizeLanguageTag(JSContext* cx,
+                                                                  unsigned argc,
+                                                                  Value* vp);
+
+[[nodiscard]] extern bool intl_TryValidateAndCanonicalizeLanguageTag(
+    JSContext* cx, unsigned argc, Value* vp);
+
+[[nodiscard]] extern bool intl_ValidateAndCanonicalizeUnicodeExtensionType(
+    JSContext* cx, unsigned argc, Value* vp);
+
+}  // namespace js
+
+#endif /* builtin_intl_Locale_h */