Macros
#define	ONION_DEBUG(...)
	Logs a debug information. When compiled in release mode this is not compiled.
#define	ONION_DEBUG0(...)
	Logs a lower debug information. When compiled in release mode this is not compiledTo use it, an environmetal variable ONION_DEBUG0=filename.c is required. If not present it shows nothing.
#define	ONION_INFO(...) onion_log(O_INFO, __FILE__, __LINE__, __VA_ARGS__)
	Logs some information.
#define	ONION_WARNING(...) onion_log(O_WARNING, __FILE__, __LINE__, __VA_ARGS__)
	Logs some warning.
#define	ONION_ERROR(...) onion_log(O_ERROR, __FILE__, __LINE__, __VA_ARGS__)
	Logs some error.

Typedefs
typedef enum onion_log_level_e	onion_log_level

Enumerations
enum	onion_log_level_e { O_DEBUG0 = 0, O_DEBUG = 1, O_INFO = 2, O_WARNING = 3, O_ERROR = 4 }
enum	onion_log_flags_e { OF_INIT = 1, OF_NOCOLOR = 2, OF_SYSLOGINIT = 8, OF_NOINFO = 16, OF_NODEBUG = 32 }

Functions
void	onion_log_stderr (onion_log_level level, const char filename, int lineno, const char fmt,...)
	Logs to stderr.It can be affected also by the environment variable ONION_LOG, with one or several of:
void	onion_log_syslog (onion_log_level level, const char filename, int lineno, const char fmt,...)
	Performs the log to the syslog.

Variables
int	onion_log_flags
void(*	onion_log )(onion_log_level level, const char filename, int lineno, const char fmt,...)
	This function can be overwritten with whatever onion_log facility you want to use, same signature.