lib: introduce new YANG helper function

One use case for the new yang_data_list_find() function is to find
input parameters in RPC northbound callbacks easily, without the
need to iterate over the input parameters manually.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/yang.h b/lib/yang.h
index 3259189e98..09d92cafdd 100644
--- a/lib/yang.h
+++ b/lib/yang.h
@@ -510,6 +510,21 @@ extern void yang_data_free(struct yang_data *data);
 extern struct list *yang_data_list_new(void);
 
 /*
+ * Find the yang_data structure corresponding to an XPath in a list.
+ *
+ * list
+ *    list of yang_data structures to operate on.
+ *
+ * xpath_fmt
+ *    XPath to search for (format string).
+ *
+ * Returns:
+ *    Pointer to yang_data if found, NULL otherwise.
+ */
+extern struct yang_data *yang_data_list_find(const struct list *list,
+					     const char *xpath_fmt, ...);
+
+/*
  * Initialize the YANG subsystem. Should be called only once during the
  * daemon initialization process.
  */