Added WriteProperty setter for BACnet Unsigned Integer values. (#834)

src/bacnet/wp.c

@@ -425,3 +425,41 @@ bool write_property_empty_string_valid(
 
     return (valid);
 }
+
+/**
+ * @brief Helper to decode a WriteProperty unsigned integer and set a property
+ * @param wp_data - #BACNET_WRITE_PROPERTY_DATA data including any
+ *  error response.
+ * @param value - #BACNET_APPLICATION_DATA_VALUE data
+ * @param setter - function to set the property
+ * @param maximum - maximum value allowed for the property
+ * @return true if the value was decoded and set, else false
+ */
+bool write_property_unsigned_decode(
+    BACNET_WRITE_PROPERTY_DATA *wp_data,
+    BACNET_APPLICATION_DATA_VALUE *value,
+    bacnet_property_unsigned_setter setter,
+    BACNET_UNSIGNED_INTEGER maximum)
+{
+    bool status = write_property_type_valid(
+        wp_data, value, BACNET_APPLICATION_TAG_UNSIGNED_INT);
+    if (status) {
+        if (value->type.Unsigned_Int <= maximum) {
+            status =
+                (setter)(wp_data->object_instance, value->type.Unsigned_Int);
+            if (status) {
+                wp_data->error_class = ERROR_CLASS_PROPERTY;
+                wp_data->error_code = ERROR_CODE_SUCCESS;
+            } else {
+                wp_data->error_class = ERROR_CLASS_PROPERTY;
+                wp_data->error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
+            }
+        } else {
+            wp_data->error_class = ERROR_CLASS_PROPERTY;
+            wp_data->error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
+            status = false;
+        }
+    }
+
+    return status;
+}