video-pc/libs/Recorder/log_helper.h

#ifndef AM_LOG
#define AM_LOG

#include <stdio.h>
#include <sys\timeb.h>
#include <time.h>

#include <windows.h>

class AMLog
{
public:
    ~AMLog();
    static AMLog* get(const char* path = NULL);
    void printf(const char* format, ...);

private:
    AMLog(FILE* handle);

private:
    static AMLog* _log;
    FILE* _handle;
};

enum AM_LOG_TYPE {
    AL_TYPE_DEBUG = 0,
    AL_TYPE_INFO,
    AL_TYPE_WARN,
    AL_TYPE_ERROR,
    AL_TYPE_FATAL,
};

static const char* AM_LOG_STR[] = {"DEBUG", "INFO", "WARN", "ERROR", "FATAL"};

#define al_printf(type, format, datetime, ms, ...) \
    printf("%s-%.3d [%s] [%s(%d)] " format "\n", \
           datetime, \
           ms, \
           type, \
           __FUNCTION__, \
           __LINE__, \
           ##__VA_ARGS__)

#define PRINT_LINE(type, format, datetime, ms, ...) \
    printf("%s-%.3d [%s] [%s(%d)] " format "\n", \
           datetime, \
           ms, \
           type, \
           __FUNCTION__, \
           __LINE__, \
           ##__VA_ARGS__)

#define al_log(type, format, ...) \
    do { \
        struct _timeb now; \
        struct tm today; \
        char datetime_str[20]; \
        _ftime_s(&now); \
        localtime_s(&today, &now.time); \
        strftime(datetime_str, 20, "%Y-%m-%d %H:%M:%S", &today); \
        AMLog* am_log = AMLog::get(); \
        if (am_log) { \
            am_log->PRINT_LINE(AM_LOG_STR[type], format, datetime_str, now.millitm, ##__VA_ARGS__); \
        } else { \
            al_printf(AM_LOG_STR[type], format, datetime_str, now.millitm, ##__VA_ARGS__); \
        } \
    } while (0)

#define al_debug(format, ...) al_log(AL_TYPE_DEBUG, format, ##__VA_ARGS__)
#define al_info(format, ...) al_log(AL_TYPE_INFO, format, ##__VA_ARGS__)
#define al_warn(format, ...) al_log(AL_TYPE_WARN, format, ##__VA_ARGS__)
#define al_error(format, ...) al_log(AL_TYPE_ERROR, format, ##__VA_ARGS__)
#define al_fatal(format, ...) al_log(AL_TYPE_FATAL, format, ##__VA_ARGS__)

#endif