Add debug levels

src/common/include/common/debug.h

@@ -0,0 +1,48 @@
+#ifndef _COMMON_DEBUG_H
+#define _COMMON_DEBUG_H
+
+#include <stdio.h>
+
+#define LEVEL_TRACE 5
+#define LEVEL_DEBUG 4
+#define LEVEL_INFO 3
+#define LEVEL_WARN 2
+#define LEVEL_ERROR 1
+#define LEVEL_NONE 0
+
+// This is the user-configurable log level
+#ifndef LEVEL
+    #define LEVEL LEVEL_INFO
+#endif
+
+#if LEVEL >= LEVEL_TRACE
+    #define TRACE(...) printf(__VA_ARGS__)
+#else
+    #define TRACE(...)
+#endif
+
+#if LEVEL >= LEVEL_DEBUG
+    #define DEBUG(...) printf(__VA_ARGS__)
+#else
+    #define DEBUG(...)
+#endif
+
+#if LEVEL >= LEVEL_INFO
+    #define INFO(...) printf(__VA_ARGS__)
+#else
+    #define INFO(...)
+#endif
+
+#if LEVEL >= LEVEL_WARN
+    #define WARN(...) printf(__VA_ARGS__)
+#else
+    #define WARN(...)
+#endif
+
+#if LEVEL >= LEVEL_ERROR
+    #define ERROR(...) printf(__VA_ARGS__)
+#else
+    #define ERROR(...)
+#endif
+
+#endif // _COMMON_DEBUG_H