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 41 __attribute__((format(printf, 2, 3))) static int Log(LogLevel level, const char* fmt, ...); 42 __attribute__((format(printf, 1, 2))) static int Debug(const char* fmt, ...); 43 __attribute__((format(printf, 1, 2))) static int Info(const char* fmt, ...); 44 __attribute__((format(printf, 1, 2))) static int Warning(const char* fmt, ...); 45 __attribute__((format(printf, 1, 2))) static int Error(const char* fmt, ...); 46 __attribute__((format(printf, 1, 2))) static int Severe(const char* fmt, ...); 47 48 protected: set_instance(Logger * logger)49 static void set_instance(Logger* logger) { instance_ = logger; } 50 51 private: 52 // Disallow copying. 53 Logger(const Logger&); 54 void operator=(const Logger&); 55 56 static Logger* instance_; 57 }; 58 59 #define __KM_STR(x) #x 60 #define __KM_STRINGIFY(x) __KM_STR(x) 61 #define __KM_FILE_LINE __FILE__ ", Line " __KM_STRINGIFY(__LINE__) ": " 62 63 #define LOG_D(fmt, ...) Logger::Debug(__KM_FILE_LINE fmt, ##__VA_ARGS__) 64 #define LOG_I(fmt, ...) Logger::Info(__KM_FILE_LINE fmt, ##__VA_ARGS__) 65 #define LOG_W(fmt, ...) Logger::Warning(__KM_FILE_LINE fmt, ##__VA_ARGS__) 66 #define LOG_E(fmt, ...) Logger::Error(__KM_FILE_LINE fmt, ##__VA_ARGS__) 67 #define LOG_S(fmt, ...) Logger::Severe(__KM_FILE_LINE fmt, ##__VA_ARGS__) 68 69 } // namespace keymaster 70 71 #endif // SYSTEM_KEYMASTER_LOGGER_H_ 72