Logger.h

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#ifndef LOGGER_H
#define LOGGER_H
 
#define LOG_RAW 0
#define LOG_DEFAULT 0x0001
#define LOG_STDERR 0x0002
#define LOG_BOTH (LOG_DEFAULT | LOG_STDERR)
 
#ifdef NO_LOGGER
#define logprint(LEVEL, STR)
#define logprintf(LEVEL, FMT, ...)
#else
 
#include <chrono>
#include <string>
 
class Logger {
private:
    struct Private;
    Private *m;
 
    struct LogItem;
    typedef std::chrono::system_clock::time_point time_point_t;
 
    int log_file_permission() const
    {
        return 0644;
    }
 
    int log_rotate_size() const
    {
        // return 10 * 1024 * 1024;
        return 0; // rotate disabled
    }
 
    time_point_t now();
    void write(const char *ptr, size_t len);
    void write(const LogItem &item);
    void push(const LogItem &item);
    void rotate();
    void x_close();
    void x_start();
    void x_stop();
    void x_pause(bool f);
    void x_open(const std::string &log_file);
public:
    Logger();
    ~Logger();
    void x_logprint(const char *file, int line, int level, std::string_view str);
    void x_logprintf(const char *file, int line, int level, const char *fmt, ...);
    static void pause(bool f);
    static void start();
    static void stop();
    static void open(std::string const &log_file);
 
};
 
extern Logger x_logger;
 
#define logprint(LEVEL, STR) x_logger.x_logprint(__FILE__, __LINE__, LEVEL, STR)
#define logprintf(LEVEL, FMT, ...) x_logger.x_logprintf(__FILE__, __LINE__, LEVEL, FMT, ##__VA_ARGS__)
 
#endif
 
#endif // LOGGER_H