libmobile: add function to set library debugging level

libmobile.c

@@ -5,7 +5,8 @@
 static const char *const ZTE = "usb0";
 static const char *const HILINK = "eth5";
 
-// check other libraries to maintain similar structure, libwifi, libethernet, libdsl
+int lib_debug = 0;
+
 struct json_object *mobile_set_pin(struct dongle *dev, char *current_pin, char *new_pin)
 {
 	if (strcmp(dev->if_name, ZTE) == 0)
@@ -295,3 +296,14 @@ struct json_object *mobile_get_system_info(struct dongle *dev)
 
 	return NULL;
 }
+
+void *set_lib_debug(int debug_level)
+{
+	if (debug_level > 1 || debug_level < 0) {
+		lib_debug_print("Only debug levels 0 and 1 are available for the library debugging\n");
+		return;
+	}
+
+	lib_debug = debug_level;
+	lib_debug_print("debug level %d\n", lib_debug);
+}

libmobile.h

@@ -7,7 +7,6 @@
 #define LIBMOBILE_H
 #include "lib_commons.h"
 
-
 /**
  * Holds information about a mounted mobile dongle.
  */