Index: json-c-0.13.1/arraylist.c
===================================================================
--- json-c-0.13.1.orig/arraylist.c	2017-11-30 12:41:30.000000000 +0800
+++ json-c-0.13.1/arraylist.c	2019-08-13 15:46:21.880650000 +0800
@@ -66,7 +66,7 @@
 void*
 array_list_get_idx(struct array_list *arr, size_t i)
 {
-  if(i >= arr->length) return NULL;
+  if(i >= arr->length || i < 0) return NULL;
   return arr->array[i];
 }
 
@@ -102,7 +102,11 @@
     arr->free_fn(arr->array[idx]);
   arr->array[idx] = data;
   if(arr->length <= idx) arr->length = idx + 1;
+#if 0 /* ZyXEL, john */
   return 0;
+#else
+  return idx + 1;
+#endif
 }
 
 int
@@ -144,3 +148,25 @@
 	arr->length -= count;
 	return 0;
 }
+
+
+#if 1 /* zyxel, john */
+#include "json_object.h"
+int array_list_delete_idx(struct array_list *arr, int idx)
+{
+	if(idx > arr->length) return -1;
+
+	if(arr->array[idx]) arr->free_fn(arr->array[idx]);
+
+	if((idx + 1) == arr->length) {
+		arr->array[idx] = NULL; 
+		arr->length--;
+	}
+	else {
+		arr->array[idx] = json_object_new_object();
+		json_object_object_add(arr->array[idx], "emptyIns", json_object_new_boolean(1));
+	}
+
+	return 0;	
+}
+#endif
Index: json-c-0.13.1/arraylist.h
===================================================================
--- json-c-0.13.1.orig/arraylist.h	2017-12-07 12:55:20.000000000 +0800
+++ json-c-0.13.1/arraylist.h	2019-08-13 15:46:21.880650000 +0800
@@ -63,6 +63,9 @@
 extern int 
 array_list_del_idx(struct array_list *arr, size_t idx, size_t count);
 
+extern int
+array_list_delete_idx(struct array_list *arr, int idx);
+
 #ifdef __cplusplus
 }
 #endif
Index: json-c-0.13.1/json_object.c
===================================================================
--- json-c-0.13.1.orig/json_object.c	2017-12-26 04:17:52.000000000 +0800
+++ json-c-0.13.1/json_object.c	2019-08-13 15:46:21.884651999 +0800
@@ -295,7 +295,10 @@
 		case json_type_double:
 			jso->_to_json_string = &json_object_double_to_json_string_default;
 			break;
-		case json_type_int:
+		case json_type_uint32:
+		case json_type_uint16:
+		case json_type_uint8:
+		case json_type_ulong:
 			jso->_to_json_string = &json_object_int_to_json_string;
 			break;
 		case json_type_object:
@@ -304,6 +307,9 @@
 		case json_type_array:
 			jso->_to_json_string = &json_object_array_to_json_string;
 			break;
+		case json_type_time:
+		case json_type_base64:
+		case json_type_hex:
 		case json_type_string:
 			jso->_to_json_string = &json_object_string_to_json_string;
 			break;
@@ -1157,6 +1163,14 @@
 	json_object_generic_delete(jso);
 }
 
+#if 1 /* zyxel, john */
+int json_object_array_delete_idx(struct json_object *jso,
+					      int idx)
+{
+  return array_list_delete_idx(jso->o.c_array, idx);
+}
+#endif
+
 struct json_object* json_object_new_array(void)
 {
 	struct json_object *jso = json_object_new(json_type_array);
Index: json-c-0.13.1/json_object.h
===================================================================
--- json-c-0.13.1.orig/json_object.h	2018-03-05 11:39:11.000000000 +0800
+++ json-c-0.13.1/json_object.h	2019-08-13 15:48:19.147253992 +0800
@@ -43,6 +43,18 @@
 #include "json_inttypes.h"
 #include "printbuf.h"
 
+
+#if 1 /* zyxel, john */
+
+/** Delete the element at specificed index of the array (a json_object of type json_type_array)
+ * @param obj the json_object array
+ * @param idx the index of the deteled element
+ * @returns 0
+ */
+extern int json_object_array_delete_idx(struct json_object *jso,
+					      int idx);
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -180,9 +192,16 @@
   json_type_boolean,
   json_type_double,
   json_type_int,
+  json_type_uint8,
+  json_type_uint16,
+  json_type_uint32,
   json_type_object,
   json_type_array,
-  json_type_string
+  json_type_string,
+  json_type_time,
+  json_type_base64,
+  json_type_hex,
+  json_type_ulong
 } json_type;
 
 /* reference counting functions */
Index: json-c-0.13.1/json_util.c
===================================================================
--- json-c-0.13.1.orig/json_util.c	2017-11-30 12:41:30.000000000 +0800
+++ json-c-0.13.1/json_util.c	2019-08-13 15:49:42.360840007 +0800
@@ -177,7 +177,7 @@
 		/* because of the above check for ret < 0, we can safely cast and add */
 		wpos += (unsigned int)ret;
 	}
-
+	fsync(fd);
 	return 0;
 }