Add logger

src/logger.h

@@ -0,0 +1,40 @@
+/**
+ * sesimos - secure, simple, modern web server
+ * @brief Logger (header file)
+ * @file src/logger.h
+ * @author Lorenz Stechauner
+ * @date 2022-12-10
+ */
+
+#ifndef SESIMOS_LOGGER_H
+#define SESIMOS_LOGGER_H
+
+#define LOG_DEBUG 7
+#define LOG_INFO 6
+#define LOG_NOTICE 5
+#define LOG_WARNING 4
+#define LOG_ERROR 3
+#define LOG_CRITICAL 2
+#define LOG_ALERT 1
+
+typedef unsigned char log_lvl_t;
+
+#define debug(...) logmsgf(LOG_DEBUG, __VA_ARGS__)
+#define info(...) logmsgf(LOG_INFO, __VA_ARGS__)
+#define notice(...) logmsgf(LOG_NOTICE, __VA_ARGS__)
+#define warning(...) logmsgf(LOG_WARNING, __VA_ARGS__)
+#define error(...) logmsgf(LOG_ERROR, __VA_ARGS__)
+#define critical(...) logmsgf(LOG_CRITICAL, __VA_ARGS__)
+#define alert(...) logmsgf(LOG_ALERT, __VA_ARGS__)
+
+void logmsgf(log_lvl_t level, const char *restrict format, ...);
+
+void logger_set_name(const char *restrict name);
+
+void logger_set_prefix(const char *restrict prefix);
+
+void logger(void);
+
+void logger_stop(void);
+
+#endif //SESIMOS_LOGGER_H