| // Copyright (C) 2011 The Libphonenumber Authors |
| // |
| // 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. |
| |
| // Author: Philippe Liard |
| |
| #ifndef I18N_PHONENUMBERS_DEFAULT_LOGGER_H_ |
| #define I18N_PHONENUMBERS_DEFAULT_LOGGER_H_ |
| |
| #include "phonenumbers/logger.h" |
| |
| #include <sstream> |
| #include <string> |
| |
| namespace i18n { |
| namespace phonenumbers { |
| |
| using i18n::phonenumbers::Logger; |
| using std::string; |
| using std::stringstream; |
| |
| // Class template used to inline the right implementation for the T -> string |
| // conversion. |
| template <typename T> |
| struct ConvertToString; |
| |
| template <typename T> |
| struct ConvertToString { |
| static inline string DoWork(const T& s) { |
| return string(s); |
| } |
| }; |
| |
| template <> |
| struct ConvertToString<int> { |
| static inline string DoWork(int n) { |
| stringstream stream; |
| stream << n; |
| string result; |
| stream >> result; |
| return result; |
| } |
| }; |
| |
| class LoggerHandler { |
| public: |
| LoggerHandler(Logger* impl) : impl_(impl) {} |
| |
| ~LoggerHandler() { |
| if (impl_) { |
| impl_->WriteMessage("\n"); |
| } |
| } |
| |
| template <typename T> |
| LoggerHandler& operator<<(const T& value) { |
| if (impl_) { |
| impl_->WriteMessage(ConvertToString<T>::DoWork(value)); |
| } |
| return *this; |
| } |
| |
| private: |
| Logger* const impl_; |
| }; |
| |
| inline LoggerHandler LOG(int n) { |
| Logger* const logger_impl = Logger::mutable_logger_impl(); |
| if (logger_impl->level() < n) { |
| return LoggerHandler(NULL); |
| } |
| logger_impl->WriteLevel(); |
| return LoggerHandler(logger_impl); |
| } |
| |
| inline LoggerHandler VLOG(int n) { |
| // VLOG(1) is the next logging level after LOG(DEBUG). |
| n += LOG_DEBUG; |
| return LOG(n); |
| } |
| |
| // Default logger implementation used by PhoneNumberUtil class. It outputs the |
| // messages to the standard output. |
| class StdoutLogger : public Logger { |
| public: |
| virtual ~StdoutLogger() {} |
| |
| virtual void WriteLevel(); |
| virtual void WriteMessage(const string& msg); |
| }; |
| |
| } // namespace phonenumbers |
| } // namespace i18n |
| |
| #endif // I18N_PHONENUMBERS_DEFAULT_LOGGER_H_ |