Added encoding function for context tagged character strings.

bacnet-stack/bacdcode.c

@@ -1084,6 +1084,22 @@ int encode_tagged_character_string(uint8_t * apdu,
     return len;
 }
 
+int encode_context_character_string(uint8_t * apdu, int tag_number,
+    BACNET_CHARACTER_STRING *char_string)
+{
+    int len = 0;
+    int string_len = 0;
+
+    string_len = characterstring_length(char_string) + 1 /* for encoding */;
+    len += encode_tag(&apdu[0], (uint8_t)tag_number, true, string_len);
+    if ((len + string_len) < MAX_APDU)
+      len += encode_bacnet_character_string(&apdu[len], char_string);
+    else
+      len = 0;
+
+    return len;
+}
+
 // from clause 20.2.9 Encoding of a Character String Value
 // and 20.2.1 General Rules for Encoding BACnet Tags
 // returns the number of apdu bytes consumed
@@ -1861,7 +1877,7 @@ void testBACDCodeObject(Test * pTest)
     };
     BACNET_OBJECT_TYPE type = OBJECT_BINARY_INPUT;
     BACNET_OBJECT_TYPE decoded_type = OBJECT_ANALOG_OUTPUT;
-    int instance = 123;
+    uint32_t instance = 123;
     uint32_t decoded_instance = 0;
 
     encode_bacnet_object_id(&encoded_array[0], type, instance);

bacnet-stack/bacdcode.h

@@ -115,6 +115,8 @@ int encode_bacnet_character_string(uint8_t * apdu,
     BACNET_CHARACTER_STRING *char_string);
 int encode_tagged_character_string(uint8_t * apdu,
     BACNET_CHARACTER_STRING *char_string);
+int encode_context_character_string(uint8_t * apdu, int tag_number,
+    BACNET_CHARACTER_STRING *char_string);
 int decode_character_string(uint8_t * apdu, uint32_t len_value,
     BACNET_CHARACTER_STRING *char_string);