added a sendWriteRequest, writeAckHandler, wp decode service request, struct and library to map property to tag

bacnet-stack/indtext.h

@@ -45,10 +45,21 @@ typedef struct
   const char *pString; /* text pair - use NULL to end the list */
 } INDTEXT_DATA;
 
+typedef struct
+{
+  unsigned prop_id; /* index number that matches the text */
+  unsigned tag_id; /* text pair - use NULL to end the list */
+} PROP_TAG_DATA;
+
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 
+unsigned indtext_tag_by_index_default(
+  PROP_TAG_DATA *data_list,
+  unsigned index,
+  unsigned default_ret);
+
 /*  Searches for a matching string and returns the index to the string
     in the parameter found_index.
     If the string is not found, false is returned