1 files changed, 45 insertions, 0 deletions
diff --git a/intl/components/src/NumberParser.cpp b/intl/components/src/NumberParser.cpp
new file mode 100644
index 0000000000..fb97393783
--- /dev/null
+++ b/intl/components/src/NumberParser.cpp
@@ -0,0 +1,45 @@
+/* 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/NumberParser.h"
+
+namespace mozilla::intl {
+
+/*static*/ Result<UniquePtr<NumberParser>, ICUError> NumberParser::TryCreate(
+    const char* aLocale, bool aUseGrouping) {
+  UniquePtr<NumberParser> nf = MakeUnique<NumberParser>();
+
+  UErrorCode status = U_ZERO_ERROR;
+  nf->mNumberFormat =
+      unum_open(UNUM_DECIMAL, nullptr, 0, aLocale, nullptr, &status);
+  if (U_FAILURE(status)) {
+    return Err(ToICUError(status));
+  }
+
+  if (!aUseGrouping) {
+    unum_setAttribute(nf->mNumberFormat.GetMut(), UNUM_GROUPING_USED, UBool(0));
+  }
+
+  return nf;
+}
+
+NumberParser::~NumberParser() {
+  if (mNumberFormat) {
+    unum_close(mNumberFormat.GetMut());
+  }
+}
+
+Result<std::pair<double, int32_t>, ICUError> NumberParser::ParseDouble(
+    Span<const char16_t> aDouble) const {
+  UErrorCode status = U_ZERO_ERROR;
+  int32_t parsePos = 0;
+  double value = unum_parseDouble(mNumberFormat.GetConst(), aDouble.data(),
+                                  static_cast<int32_t>(aDouble.size()),
+                                  &parsePos, &status);
+  if (U_FAILURE(status)) {
+    return Err(ToICUError(status));
+  }
+  return std::make_pair(value, parsePos);
+}
+
+}  // namespace mozilla::intl