[rac] Temporarily copy libaddressinput to Chrome.

third_party/libaddressinput/chromium/cpp/src/util/json.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 "json.h"
+
+#include <libaddressinput/util/basictypes.h>
+#include <libaddressinput/util/scoped_ptr.h>
+
+#include <cassert>
+#include <cstddef>
+#include <string>
+
+#include <rapidjson/document.h>
+#include <rapidjson/reader.h>
+
+namespace i18n {
+namespace addressinput {
+
+namespace {
+
+class Rapidjson : public Json {
+ public:
+  Rapidjson() : document_(new rapidjson::Document), valid_(false) {}
+
+  virtual ~RapidJson() {}
+
+  virtual bool ParseObject(const std::string& json) {
+    document_->Parse<rapidjson::kParseValidateEncodingFlag>(json.c_str());
+    valid_ = !document_->HasParseError() && document_->IsObject();
+    return valid_;
+  }
+
+  virtual bool HasStringValueForKey(const std::string& key) const {
+    assert(valid_);
+    const rapidjson::Value::Member* member = document_->FindMember(key.c_str());
+    return member != NULL && member->value.IsString();
+  }
+
+  virtual std::string GetStringValueForKey(const std::string& key) const {
+    assert(valid_);
+    const rapidjson::Value::Member* member = document_->FindMember(key.c_str());
+    assert(member != NULL);
+    assert(member->value.IsString());
+    return std::string(member->value.GetString(),
+                      member->value.GetStringLength());
+  }
+
+ protected:
+  // JSON document.
+  scoped_ptr<rapidjson::Document> document_;
+
+  // True if the parsed string is a valid JSON object.
+  bool valid_;
+
+  DISALLOW_COPY_AND_ASSIGN(Rapidjson);
+};
+
+}  // namespace
+
+Json::~Json() {}
+
+// static
+Json* Json::Build() {
+  return new Rapidjson;
+}
+
+Json::Json() {}
+
+}  // namespace addressinput
+}  // namespace i18n