| // Copyright 2019 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "util/json/json_value.h" |
| |
| namespace openscreen { |
| |
| absl::optional<int> MaybeGetInt(const Json::Value& message, |
| const char* first, |
| const char* last) { |
| const Json::Value* value = message.find(first, last); |
| absl::optional<int> result; |
| if (value && value->isInt()) { |
| result = value->asInt(); |
| } |
| return result; |
| } |
| |
| absl::optional<absl::string_view> MaybeGetString(const Json::Value& message) { |
| if (message.isString()) { |
| const char* begin = nullptr; |
| const char* end = nullptr; |
| message.getString(&begin, &end); |
| if (begin && end >= begin) { |
| return absl::string_view(begin, end - begin); |
| } |
| } |
| return absl::nullopt; |
| } |
| |
| absl::optional<absl::string_view> MaybeGetString(const Json::Value& message, |
| const char* first, |
| const char* last) { |
| const Json::Value* value = message.find(first, last); |
| absl::optional<absl::string_view> result; |
| if (value && value->isString()) { |
| return MaybeGetString(*value); |
| } |
| return result; |
| } |
| |
| } // namespace openscreen |