From: Arran Cudbard-Bell <a.cudbardb@freeradius.org>
Date: Thu, 18 Aug 2022 06:30:19 +0000 (+0700)
Subject: Add inverse of fr_pair_list_to_dlist
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cc0baf0709aa2a45e42bac719b2660b33a804123;p=thirdparty%2Ffreeradius-server.git

Add inverse of fr_pair_list_to_dlist
---

diff --git a/src/lib/util/pair.h b/src/lib/util/pair.h
index 112099b4b52..6e08f7c592b 100644
--- a/src/lib/util/pair.h
+++ b/src/lib/util/pair.h
@@ -598,7 +598,9 @@ bool		fr_pair_list_empty(fr_pair_list_t const *list) CC_HINT(nonnull);
 
 size_t		fr_pair_list_num_elements(fr_pair_list_t const *list) CC_HINT(nonnull);
 
-fr_dlist_head_t *fr_pair_list_dlist_head(fr_pair_list_t const *list) CC_HINT(nonnull);
+fr_dlist_head_t *fr_pair_list_to_dlist(fr_pair_list_t const *list) CC_HINT(nonnull);
+
+fr_pair_list_t	*fr_pair_list_from_dlist(fr_dlist_head_t const *list) CC_HINT(nonnull);
 
 void		fr_pair_list_sort(fr_pair_list_t *list, fr_cmp_t cmp) CC_HINT(nonnull);
 
diff --git a/src/lib/util/pair_inline.c b/src/lib/util/pair_inline.c
index 042ba347d96..fe242b3f668 100644
--- a/src/lib/util/pair_inline.c
+++ b/src/lib/util/pair_inline.c
@@ -147,13 +147,23 @@ _INLINE size_t fr_pair_list_num_elements(fr_pair_list_t const *list)
  *
  * @param[in] list to get the head from
  *
- * @return number of entries in the list
+ * @return the pointer to the dlist wihin the pair list.
  */
-_INLINE fr_dlist_head_t *fr_pair_list_dlist_head(fr_pair_list_t const *list)
+_INLINE fr_dlist_head_t *fr_pair_list_to_dlist(fr_pair_list_t const *list)
 {
 	return fr_pair_order_list_dlist_head(&list->order);
 }
 
+/** Get the pair list head from a dlist
+ *
+ * @param[in] list	The order list from a pair list.
+ * @return The pair list head.
+ */
+_INLINE fr_pair_list_t *fr_pair_list_from_dlist(fr_dlist_head_t const *list)
+{
+	return (uintptr_t)list - offsetof(fr_pair_list_t, order);
+}
+
 /** Appends a list of fr_pair_t from a temporary list to a destination list
  *
  * @param dst list to move pairs into