1 /* 2 * Copyright 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SYSTEM_KEYMASTER_LOGGER_H_ 18 #define SYSTEM_KEYMASTER_LOGGER_H_ 19 20 #include <stdarg.h> 21 22 namespace keymaster { 23 24 class Logger { 25 public: Logger()26 Logger() {} ~Logger()27 virtual ~Logger() {} 28 29 enum LogLevel { 30 DEBUG_LVL, // Messages used only for debugging 31 INFO_LVL, // Informational messages; something is unusual but not wrong 32 WARNING_LVL, // There's an indication of trouble, but it may be okay. 33 ERROR_LVL, // A problem has occurred, but processing can continue 34 SEVERE_LVL, // A severe problem has occurred; likely indicates a defect. 35 }; 36 37 virtual int log_msg(LogLevel level, const char* fmt, va_list args) const = 0; 38 39 static int Log(LogLevel level, const char* fmt, va_list args); 40 static int Log(LogLevel level, const char* fmt, ...); 41 static int Debug(const char* fmt, ...); 42 static int Info(const char* fmt, ...); 43 static int Warning(const char* fmt, ...); 44 static int Error(const char* fmt, ...); 45 static int Severe(const char* fmt, ...); 46 47 protected: set_instance(Logger * logger)48 static void set_instance(Logger* logger) { instance_ = logger; } 49 50 private: 51 // Disallow copying. 52 Logger(const Logger&); 53 void operator=(const Logger&); 54 55 static Logger* instance_; 56 }; 57 58 #define STR(x) #x 59 #define STRINGIFY(x) STR(x) 60 #define FILE_LINE __FILE__ ", Line " STRINGIFY(__LINE__) ": " 61 62 #define LOG_D(fmt, ...) Logger::Debug(FILE_LINE fmt, __VA_ARGS__) 63 #define LOG_I(fmt, ...) Logger::Info(FILE_LINE fmt, __VA_ARGS__) 64 #define LOG_W(fmt, ...) Logger::Warning(FILE_LINE fmt, __VA_ARGS__) 65 #define LOG_E(fmt, ...) Logger::Error(FILE_LINE fmt, __VA_ARGS__) 66 #define LOG_S(fmt, ...) Logger::Severe(FILE_LINE fmt, __VA_ARGS__) 67 68 } // namespace keymaster 69 70 #endif // SYSTEM_KEYMASTER_LOGGER_H_ 71