libliftoff/include/log.h

#ifndef LOG_H
#define LOG_H

#include <libliftoff.h>

#ifdef __GNUC__
#define _LIFTOFF_ATTRIB_PRINTF(start, end) __attribute__((format(printf, start, end)))
#else
#define _LIFTOFF_ATTRIB_PRINTF(start, end)
#endif

bool log_has(enum liftoff_log_importance verbosity);

void liftoff_log(enum liftoff_log_importance verbosity,
		 const char *format, ...) _LIFTOFF_ATTRIB_PRINTF(2, 3);
void liftoff_log_errno(enum liftoff_log_importance verbosity, const char *msg);

struct liftoff_log_buffer {
	char *data;
	size_t len, cap;
};

void liftoff_log_buffer_append(struct liftoff_log_buffer *buf,
							   const char *fmt, ...);
void liftoff_log_buffer_flush(struct liftoff_log_buffer *buf,
							  enum liftoff_log_importance verbosity);

#endif