1 files changed, 36 insertions, 0 deletions
diff --git a/intl/components/src/LocaleCanonicalizer.cpp b/intl/components/src/LocaleCanonicalizer.cpp
new file mode 100644
index 0000000000..8a83874390
--- /dev/null
+++ b/intl/components/src/LocaleCanonicalizer.cpp
@@ -0,0 +1,36 @@
+/* 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 "mozilla/intl/LocaleCanonicalizer.h"
+#include <cstdio>
+#include "unicode/uloc.h"
+
+namespace mozilla::intl {
+
+/* static */
+ICUResult LocaleCanonicalizer::CanonicalizeICULevel1(
+    const char* aLocaleIn, LocaleCanonicalizer::Vector& aLocaleOut) {
+  auto result = FillBufferWithICUCall(
+      aLocaleOut,
+      [&aLocaleIn](char* target, int32_t length, UErrorCode* status) {
+        return uloc_canonicalize(aLocaleIn, target, length, status);
+      });
+
+  if (result.isErr()) {
+    return Err(result.unwrapErr());
+  }
+
+  // This step is not included in the normal ICU4C canonicalization step, but
+  // consumers were expecting the results to actually be ASCII. It seemed safer
+  // to include it.
+  for (auto byte : aLocaleOut) {
+    if (static_cast<unsigned char>(byte) > 127) {
+      return Err(ICUError::InternalError);
+    }
+  }
+
+  return Ok();
+}
+
+}  // namespace mozilla::intl