log.h

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#ifndef __LIBINSANE_LOG_H
#define __LIBINSANE_LOG_H
 
enum lis_log_level {
    LIS_LOG_LVL_MIN = 0,
    LIS_LOG_LVL_DEBUG = LIS_LOG_LVL_MIN,
    LIS_LOG_LVL_INFO,
    LIS_LOG_LVL_WARNING,
    LIS_LOG_LVL_ERROR,
    LIS_LOG_LVL_MAX = LIS_LOG_LVL_ERROR,
};
 
 
typedef void (lis_log_callback)(enum lis_log_level lvl, const char *msg);
 
 
struct lis_log_callbacks {
    lis_log_callback *callbacks[LIS_LOG_LVL_MAX + 1];
};
 
 
extern void lis_set_log_callbacks(const struct lis_log_callbacks *callbacks);
 
 
/* functions inside libinsane to log */
 
extern void lis_log(enum lis_log_level lvl, const char *file, int line, const char *func, const char *fmt, ...)
#ifdef __GNUC__
    __attribute__ ((format (printf, 5, 6)))
#endif
    ;
 
#define lis_log_debug(...) lis_log(LIS_LOG_LVL_DEBUG, __FILE__, __LINE__, __func__, __VA_ARGS__);
#define lis_log_info(...) lis_log(LIS_LOG_LVL_INFO, __FILE__, __LINE__, __func__, __VA_ARGS__);
#define lis_log_warning(...) lis_log(LIS_LOG_LVL_WARNING, __FILE__, __LINE__, __func__, __VA_ARGS__);
#define lis_log_error(...) lis_log(LIS_LOG_LVL_ERROR, __FILE__, __LINE__, __func__, __VA_ARGS__);
 
 
extern void lis_log_raw(enum lis_log_level lvl, const char *msg);
extern void lis_log_reset(void);
 
 
lis_log_callback lis_log_stderr;
 
 
lis_log_callback lis_log_stdout;
 
#endif