1 files changed, 52 insertions, 0 deletions
diff --git a/lib/include/log.h b/lib/include/log.h
new file mode 100644
index 0000000..a8549e0
--- /dev/null
+++ b/lib/include/log.h
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdarg.h>
+
+#define LOG_TRACE 0u
+#define LOG_DEBUG 1u
+#define LOG_INFO  2u
+#define LOG_WARN  3u
+#define LOG_ERROR 4u
+
+void vl_log_setlevel(unsigned level);
+
+void vl_logv(unsigned level, const char *fmt, va_list args);
+void vl_log(unsigned level, const char *fmt, ...) __attribute__((format(printf, 2, 3)));
+
+#ifndef LOG_MIN_LEVEL
+#define LOG_MIN_LEVEL LOG_TRACE
+#endif
+
+#if LOG_TRACE >= LOG_MIN_LEVEL
+#define LOG_TRACE_ENABLED
+#define vl_trace(...) vl_log(LOG_TRACE, __VA_ARGS__)
+#define vl_tracev(...) vl_logv(LOG_TRACE, __VA_ARGS__)
+#else
+#define vl_trace(...)
+#define vl_tracev(...)
+#endif
+
+#if LOG_DEBUG >= LOG_MIN_LEVEL
+#define LOG_DEBUG_ENABLED
+#define vl_debug(...) vl_log(LOG_DEBUG, __VA_ARGS__)
+#define vl_debugv(...) vl_logv(LOG_DEBUG, __VA_ARGS__)
+#else
+#define vl_debug(...)
+#define vl_debugv(...)
+#endif
+
+#if LOG_INFO >= LOG_MIN_LEVEL
+#define LOG_INFO_ENABLED
+#define vl_info(...) vl_log(LOG_INFO, __VA_ARGS__)
+#define vl_infov(...) vl_logv(LOG_INFO, __VA_ARGS__)
+#else
+#define vl_info(...)
+#define vl_infov(...)
+#endif
+
+#define LOG_WARN_ENABLED
+#define vl_warn(...) vl_log(LOG_WARN, __VA_ARGS__)
+#define vl_warnv(...) vl_logv(LOG_WARN, __VA_ARGS__)
+ 
+#define LOG_ERROR_ENABLED
+#define vl_error(...) vl_log(LOG_ERROR, __VA_ARGS__)
+#define vl_errorv(...) vl_logv(LOG_ERROR, __VA_ARGS__)