#ifndef VL_LOG_H_INCLUDED
#define VL_LOG_H_INCLUDED

#include <stdio.h>
#include <stdarg.h>

#define LOG_TRACE 0u
#define LOG_DEBUG 1u
#define LOG_INFO  2u
#define LOG_WARN  3u
#define LOG_ERROR 4u

/* Log functions MUST leave errno untouched */

void vl_log_setlevel(unsigned level);

void vl_logv(unsigned level, const char *fmt, va_list args);
void vl_log(unsigned level, const char *fmt, ...) __attribute__((format(printf, 2, 3)));

#ifndef LOG_MIN_LEVEL
#define LOG_MIN_LEVEL LOG_TRACE
#endif

#if LOG_TRACE >= LOG_MIN_LEVEL
#define LOG_TRACE_ENABLED
#define vl_trace(...) vl_log(LOG_TRACE, __VA_ARGS__)
#define vl_tracev(...) vl_logv(LOG_TRACE, __VA_ARGS__)
#else
#define vl_trace(...)
#define vl_tracev(...)
#endif

#if LOG_DEBUG >= LOG_MIN_LEVEL
#define LOG_DEBUG_ENABLED
#define vl_debug(...) vl_log(LOG_DEBUG, __VA_ARGS__)
#define vl_debugv(...) vl_logv(LOG_DEBUG, __VA_ARGS__)
#else
#define vl_debug(...)
#define vl_debugv(...)
#endif

#if LOG_INFO >= LOG_MIN_LEVEL
#define LOG_INFO_ENABLED
#define vl_info(...) vl_log(LOG_INFO, __VA_ARGS__)
#define vl_infov(...) vl_logv(LOG_INFO, __VA_ARGS__)
#else
#define vl_info(...)
#define vl_infov(...)
#endif

#define LOG_WARN_ENABLED
#define vl_warn(...) vl_log(LOG_WARN, __VA_ARGS__)
#define vl_warnv(...) vl_logv(LOG_WARN, __VA_ARGS__)
 
#define LOG_ERROR_ENABLED
#define vl_error(...) vl_log(LOG_ERROR, __VA_ARGS__)
#define vl_errorv(...) vl_logv(LOG_ERROR, __VA_ARGS__)

#endif