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Logger: add a log system instead of std::cout
Add a logger with level from ERROR to DEBUG
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| #ifndef LOGGER_H_ | ||
| #define LOGGER_H_ | ||
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| #include <iostream> | ||
| #include <fstream> | ||
| #include <string> | ||
| #include <stdarg.h> | ||
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| // Enum for log levels | ||
| enum LogLevel { | ||
| NONE = 0, // Use this to disable logging | ||
| ERROR, | ||
| WARNING, | ||
| INFO, | ||
| DEBUG | ||
| }; | ||
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| #define LOG_S_DEBUG Logger::instance()(LogLevel::DEBUG) | ||
| #define LOG_S_INFO Logger::instance()(LogLevel::INFO) | ||
| #define LOG_S_WARN Logger::instance()(LogLevel::WARNING) | ||
| #define LOG_S_ERROR Logger::instance()(LogLevel::ERROR) | ||
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| #define LOG_DEBUG(ARGS ...) Logger::instance().printf(LogLevel::DEBUG, ## ARGS) | ||
| #define LOG_INFO(ARGS...) Logger::instance().printf(LogLevel::INFO, ## ARGS) | ||
| #define LOG_WARN(ARGS...) Logger::instance().printf(LogLevel::WARNING, ## ARGS) | ||
| #define LOG_ERROR(ARGS...) Logger::instance().printf(LogLevel::ERROR, ## ARGS) | ||
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| class Logger { | ||
| private: | ||
| std::ostream& os; // The output stream (e.g., std::cout or std::ofstream) | ||
| std::ostream& err; // The error stream (e.g., std::cerr) | ||
| LogLevel currentLevel; // Current log level | ||
| LogLevel messageLevel; // The log level for the current message | ||
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| public: | ||
| static Logger &instance () | ||
| { | ||
| static Logger instance; | ||
| return instance; | ||
| } | ||
| // Constructor to set the output stream and log level (default is INFO) | ||
| Logger(std::ostream& outStream = std::cout, std::ostream& errStream = std::cerr, LogLevel level = LogLevel::INFO) | ||
| : os(outStream), err(errStream), currentLevel(level), messageLevel(LogLevel::INFO) {} | ||
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| // Set the log level for the logger | ||
| void setLogLevel(int level) { | ||
| if (level > DEBUG) | ||
| level = DEBUG; | ||
| currentLevel = static_cast<LogLevel>(level); | ||
| } | ||
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| // Set the log level for the current message | ||
| Logger& operator()(LogLevel level) { | ||
| messageLevel = level; | ||
| return *this; | ||
| } | ||
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| // Overload the << operator for generic types | ||
| template<typename T> | ||
| Logger& operator<<(const T& data) { | ||
| if (messageLevel <= currentLevel) { | ||
| if (messageLevel == ERROR) | ||
| err << data; | ||
| else | ||
| os << data; | ||
| } | ||
| return *this; | ||
| } | ||
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| // Overload for stream manipulators (like std::endl) | ||
| typedef std::ostream& (*StreamManipulator)(std::ostream&); | ||
| Logger& operator<<(StreamManipulator manip) { | ||
| if (messageLevel <= currentLevel) { | ||
| if (messageLevel == ERROR) | ||
| err << manip; | ||
| else | ||
| os << manip; // Handle std::endl, std::flush, etc. | ||
| } | ||
| return *this; | ||
| } | ||
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| void printf(LogLevel level, const char* format, ...) { | ||
| if (level <= currentLevel) { | ||
| va_list args; | ||
| va_start(args, format); | ||
| if (level == ERROR) | ||
| vfprintf(stderr, format, args); | ||
| else | ||
| vfprintf(stdout,format, args); | ||
| va_end(args); | ||
| } | ||
| } | ||
| }; | ||
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| #endif |
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