/* logger.c : PUBLIC DOMAIN - Jon Mayo - 2006 */
#ifndef LOGGER_H
#define LOGGER_H
#include <stdarg.h>

/* log filters */
#define LOG_BIT_INFO 1
#define LOG_BIT_ERROR 2
#define LOG_BIT_WARNING 4
#define LOG_BIT_VERBOSE 8
#define LOG_BIT_DEBUG 16
#define LOG_BIT_LUA 32
#define LOG_BIT_ALL 1023 /* low 10 bits are for logging filters */ 

/* the following are not a logging modes, but a config options */
#define LOG_BIT_TIMESTAMP 16384 /* prepend timestamps */
#define LOG_BIT_LOCALTIME 32768	/* use localtime instead of UTC */

#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
#define LOG_INFO(...) log_message(LOG_BIT_INFO, "INFO", ## __VA_ARGS__)
#define LOG_WARNING(...) log_imessage(LOG_BIT_WARNING, "WARNING", __FILE__, __func__, __LINE__, ## __VA_ARGS__)
#define LOG_DEBUG(...) log_imessage(LOG_BIT_DEBUG, "DEBUG", __FILE__, __func__, __LINE__, ## __VA_ARGS__)
#define LOG_ERROR(...) log_imessage(LOG_BIT_ERROR, "ERROR", __FILE__, __func__, __LINE__, ## __VA_ARGS__)
#define LOG_VERBOSE(...) log_imessage(LOG_BIT_VERBOSE, "VERBOSE", __FILE__, __func__, __LINE__, ## __VA_ARGS__)
#define LOG_ERRNO(reason) log_message(LOG_BIT_ERROR, "ERROR", "%s:%s\n", reason, strerror(errno));
#elif defined __GNUC__ && __GNUC__ >= 2
#warning C99 not detected, using GNU extensions
#define LOG_INFO(x...) log_message(LOG_BIT_INFO, "INFO", ## x)
#define LOG_WARNING(x...) log_imessage(LOG_BIT_WARNING, "WARNING", __FILE__, __FUNCTION__, __LINE__, ## x)
#define LOG_DEBUG(x...) log_imessage(LOG_BIT_DEBUG, "DEBUG", __FILE__, __FUNCTION__, __LINE__, ## x)
#define LOG_ERROR(x...) log_imessage(LOG_BIT_ERROR, "ERROR", __FILE__, __FUNCTION__, __LINE__, ## x)
#define LOG_VERBOSE(x...) log_imessage(LOG_BIT_VERBOSE, "VERBOSE", __FILE__, __FUNCTION__, __LINE__, ## x)
#define LOG_ERRNO(reason) log_message(LOG_BIT_ERROR, "ERROR", "%s:%s\n", reason, strerror(errno));
#else
#error A C99 compliant compiler is required for this module. Please put your compiler in C99 mode
#endif

void log_vimessage(unsigned mode, const char *level_name, const char *filename, const char *func, unsigned line, const char *fmt, va_list ap);
void log_vmessage(unsigned mode, const char *level_name, const char *fmt, va_list ap);
void log_imessage(unsigned mode, const char *level_name, const char *filename, const char *func, unsigned line, const char *fmt, ...);
void log_message(unsigned mode, const char *level_name, const char *fmt, ...);
void log_timestamp(unsigned mode, const char *level, const char *message);
int log_init(const char *file, unsigned log_bits);
void log_enable(unsigned bits);
void log_disable(unsigned bits);
void log_shutdown(void);

#endif