string_list: add function string_list_append_nodup()

diff --git a/string-list.h b/string-list.h
index 0684cb73bfd27846182479a4e192d682a44f201a..1b3915b741d43974d6ff78e5bd36c650485f11fb 100644 (file)
--- a/string-list.h
+++ b/string-list.h
@@ -29,6 +29,7 @@ int for_each_string_list(struct string_list *list,
 #define for_each_string_list_item(item,list) \
        for (item = (list)->items; item < (list)->items + (list)->nr; ++item)
 
+
 /* Use these functions only on sorted lists: */
 int string_list_has_string(const struct string_list *list, const char *string);
 int string_list_find_insert_index(const struct string_list *list, const char *string,
@@ -38,11 +39,28 @@ struct string_list_item *string_list_insert_at_index(struct string_list *list,
                                                     int insert_at, const char *string);
 struct string_list_item *string_list_lookup(struct string_list *list, const char *string);
 
+
 /* Use these functions only on unsorted lists: */
+
+/*
+ * Add string to the end of list.  If list->strdup_string is set, then
+ * string is copied; otherwise the new string_list_entry refers to the
+ * input string.
+ */
 struct string_list_item *string_list_append(struct string_list *list, const char *string);
+
+/*
+ * Like string_list_append(), except string is never copied.  When
+ * list->strdup_strings is set, this function can be used to hand
+ * ownership of a malloc()ed string to list without making an extra
+ * copy.
+ */
+struct string_list_item *string_list_append_nodup(struct string_list *list, char *string);
+
 void sort_string_list(struct string_list *list);
 int unsorted_string_list_has_string(struct string_list *list, const char *string);
 struct string_list_item *unsorted_string_list_lookup(struct string_list *list,
                                                     const char *string);
+
 void unsorted_string_list_delete_item(struct string_list *list, int i, int free_util);
 #endif /* STRING_LIST_H */