[rac] Temporarily copy libaddressinput to Chrome.

third_party/libaddressinput/chromium/cpp/src/address_field_util.cc

+// Copyright (C) 2013 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "address_field_util.h"
+
+#include <libaddressinput/address_field.h>
+
+#include <cassert>
+#include <cstddef>
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
+
+namespace i18n {
+namespace addressinput {
+
+namespace {
+
+std::map<char, AddressField> InitFields() {
+  std::map<char, AddressField> fields;
+  fields.insert(std::make_pair('R', COUNTRY));
+  fields.insert(std::make_pair('S', ADMIN_AREA));
+  fields.insert(std::make_pair('C', LOCALITY));
+  fields.insert(std::make_pair('D', DEPENDENT_LOCALITY));
+  fields.insert(std::make_pair('x', SORTING_CODE));
+  fields.insert(std::make_pair('Z', POSTAL_CODE));
+  fields.insert(std::make_pair('A', STREET_ADDRESS));
+  fields.insert(std::make_pair('O', ORGANIZATION));
+  fields.insert(std::make_pair('N', RECIPIENT));
+  // An extension of AddressField enum used only internally:
+  fields.insert(std::make_pair(
+      'n', static_cast<AddressField>(NEWLINE)));
+  return fields;
+}
+
+const std::map<char, AddressField>& GetFields() {
+  static const std::map<char, AddressField> kFields(InitFields());
+  return kFields;
+}
+
+bool IsTokenPrefix(char c) {
+  return c == '%';
+}
+
+bool IsToken(char c) {
+  return GetFields().find(c) != GetFields().end();
+}
+
+AddressField ParseToken(char c) {
+  std::map<char, AddressField>::const_iterator it = GetFields().find(c);
+  assert(it != GetFields().end());
+  return it->second;
+}
+
+}  // namespace
+
+void ParseAddressFieldsFormat(const std::string& format,
+                              std::vector<AddressField>* fields) {
+  assert(fields != NULL);
+  fields->clear();
+  for (std::string::const_iterator current = format.begin(),
+                                   next = format.begin() + 1;
+       current != format.end() && next != format.end();
+       ++current, ++next) {
+    if (IsTokenPrefix(*current) && IsToken(*next)) {
+      fields->push_back(ParseToken(*next));
+    }
+  }
+}
+
+}  // namespace addressinput
+}  // namespace i18n