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

#include "notify.h"

/* common messaging hook */

/* generic notifier */
static
void notify_default_(unsigned int l, const char *fmt, ...) {
	FILE *f = stderr;
	va_list ap;
	const char *level_names[] = {
		"FATAL",
		"ERROR",
		"INFO",
		"VERBOSE",
		"DEBUG",
		"DEBUG_LOCK",
	};
	const size_t levels = sizeof level_names / sizeof *level_names;

	va_start(ap, fmt);
	flockfile(f);
	if (l < levels) {
		fprintf(f, "%s", level_names[l]);
	} else {
		fprintf(f, "[%d] ", l);
	}
	vfprintf(f, fmt, ap);
	funlockfile(f);
	va_end(ap);
}

notify_fn_t *notify __attribute__((format(printf, 2, 3))) = notify_default_;