Disable debugging functionality if DEBUG flag is not set

.vscode/settings.json

@@ -12,6 +12,7 @@
         "system_error": "c",
         "array": "c",
         "string_view": "c",
-        "packet.h": "c"
+        "packet.h": "c",
+        "debug.h": "c"
     }
 }

src/debug.c

@@ -1,3 +1,5 @@
+#if DEBUG
+
 #include "stdio.h"
 
 #include "debug.h"
@@ -28,3 +30,5 @@ void hexdump(char *data, size_t len) {
         i += 16;
     }
 }
+
+#endif /* DEBUG */

src/debug.h

@@ -3,6 +3,15 @@
 
 #include <stdlib.h>
 
+#if DEBUG
+
 void hexdump(char *data, size_t len);
 
+#else /* DEBUG */
+
+#define hexdump(_data, _len) /* */
+
+#endif /* DEBUG */
+
+
 #endif /* debug_h__included */