Fixed network port object to accept host name option of host-n-port writes. (#997)

src/bacnet/bacstr.c

@@ -498,6 +498,35 @@ bool characterstring_ansi_copy(
     return false;
 }
 
+/**
+ * @brief Copy a BACnetCharacterString into a buffer with null padding
+ * @param dest  Pointer to the destination buffer.
+ * @param dest_max_len  Size of the destination buffer.
+ * @param src  Pointer to the source BACnetCharacterString.
+ * @return Length of the copied BACnetCharacterString, or 0 if the string
+ *  exceeds the destination buffer size.
+ */
+size_t characterstring_copy_value(
+    char *dest, size_t dest_max_len, const BACNET_CHARACTER_STRING *src)
+{
+    size_t i = 0, length = 0;
+
+    if (dest && src) {
+        if (src->length < dest_max_len) {
+            length = src->length;
+            for (i = 0; i < dest_max_len; i++) {
+                if (i < src->length) {
+                    dest[i] = src->value[i];
+                } else {
+                    dest[i] = 0;
+                }
+            }
+        }
+    }
+
+    return length;
+}
+
 /**
  * Returns true if the character encoding and string
  * contents are the same.