mbtk/libgsw_lib/gsw_log_interface.h

#ifndef GSW_LOG_INTERFACE_H
#define GSW_LOG_INTERFACE_H

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdarg.h>
#include <dlfcn.h>
#include <syslog.h>

#ifndef LOG_ERR_LEVEL
#define LOG_ERR_LEVEL  3      /* error conditions */
#endif
#ifndef LOG_WARN_LEVEL
#define LOG_WARN_LEVEL 4   /* warning conditions */
#endif
#ifndef LOG_INFO_LEVEL
#define LOG_INFO_LEVEL 6      /* informational */
#endif
#ifndef LOG_DEBUG_LEVEL
#define LOG_DEBUG_LEVEL 7     /* debug-level messages */
#endif
#ifndef LOG_VERBOSE_LEVEL
#define LOG_VERBOSE_LEVEL 8
#endif

typedef void (*mbtk_log)(int level, const char *fmt, ...);

extern mbtk_log gsw_fun_ptr_log;

int init_log_func(void);

#define LOG(level, tag, fmt, args...) \
    do { \
        char *file_ptr_1001 = __FILE__; \
        char *ptr_1001 = file_ptr_1001 + strlen(file_ptr_1001) - 1;   \
        char line_1001[10] = {0}; \
        sprintf(line_1001, "%d", __LINE__); \
        while(ptr_1001 >= file_ptr_1001 && *ptr_1001){ \
            if(*ptr_1001 == '/') \
                break; \
            ptr_1001--; \
        } \
        if(0 == init_log_func()) {\
            gsw_fun_ptr_log(level, "%s#%s: [%s] " fmt, ptr_1001 + 1, line_1001, tag, ##args); \
        } else {  \
            printf("%s#%s: [LOG_INIT_ERROR] [%s] " fmt, ptr_1001 + 1, line_1001, tag, ##args); \
        }\
    } while(0)

#define _GET_MACRO(_1, _2, _3, NAME, ...) NAME

#define LOGV(...) _GET_MACRO(__VA_ARGS__, LOGV_2, LOGV_1)(__VA_ARGS__)
#define LOGV_1(fmt, args...) LOG(LOG_VERBOSE_LEVEL, "DEFAULT", fmt, ##args)
#define LOGV_2(tag, fmt, args...) LOG(LOG_VERBOSE_LEVEL, tag, fmt, ##args)

#define LOGI(...) _GET_MACRO(__VA_ARGS__, LOGI_2, LOGI_1)(__VA_ARGS__)
#define LOGI_1(fmt, args...) LOG(LOG_INFO_LEVEL, "DEFAULT", fmt, ##args)
#define LOGI_2(tag, fmt, args...) LOG(LOG_INFO_LEVEL, tag, fmt, ##args)

#define LOGW(...) _GET_MACRO(__VA_ARGS__, LOGW_2, LOGW_1)(__VA_ARGS__)
#define LOGW_1(fmt, args...) LOG(LOG_WARN_LEVEL, "DEFAULT", fmt, ##args)
#define LOGW_2(tag, fmt, args...) LOG(LOG_WARN_LEVEL, tag, fmt, ##args)

#define LOGE(...) _GET_MACRO(__VA_ARGS__, LOGE_2, LOGE_1)(__VA_ARGS__)
#define LOGE_1(fmt, args...) LOG(LOG_ERR_LEVEL, "DEFAULT", fmt, ##args)
#define LOGE_2(tag, fmt, args...) LOG(LOG_ERR_LEVEL, tag, fmt, ##args)

#endif