X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=src%2Futil%2Fcontainer_slist.c;h=6b583258376ce101a49d76ec1072cc3f2564aeb5;hb=f4d040c0f0dd2fef3d73b1f4532c76219f760f75;hp=7b85dc87760780239eeab9720e1e030f64cc97fb;hpb=83b19539f4d322b43683f5838b72e9ec2c8e6073;p=oweals%2Fgnunet.git

diff --git a/src/util/container_slist.c b/src/util/container_slist.c
index 7b85dc877..6b5832583 100644
--- a/src/util/container_slist.c
+++ b/src/util/container_slist.c
@@ -250,10 +250,11 @@ GNUNET_CONTAINER_slist_clear (struct GNUNET_CONTAINER_SList *l)
 
 /**
  * Check if a list contains a certain element
- *
  * @param l list
  * @param buf payload buffer to find
  * @param len length of the payload (number of bytes in buf)
+ *
+ * @return GNUNET_YES if found, GNUNET_NO otherwise
  */
 int
 GNUNET_CONTAINER_slist_contains (const struct GNUNET_CONTAINER_SList *l,
@@ -267,6 +268,32 @@ GNUNET_CONTAINER_slist_contains (const struct GNUNET_CONTAINER_SList *l,
   return GNUNET_NO;
 }
 
+typedef int (*Comparator)(const void *,  size_t, const void *,  size_t);
+
+/**
+ * Check if a list contains a certain element
+ *
+ * @param l list
+ * @param buf payload buffer to find
+ * @param len length of the payload (number of bytes in buf)
+ * @param compare comparison function, should return 0 if compared elements match
+ *
+ * @return NULL if the 'buf' could not be found, pointer to the
+ *         list element, if found
+ */
+void *
+GNUNET_CONTAINER_slist_contains2 (const struct GNUNET_CONTAINER_SList *l,
+                                  const void *buf, size_t len,
+                                  Comparator compare)
+{
+  struct GNUNET_CONTAINER_SList_Elem *e;
+
+  for (e = l->head; e != NULL; e = e->next)
+    if ((e->len == len) && (*compare)(buf, len, e->elem, e->len) == 0)
+      return e->elem;
+  return NULL;
+}
+
 
 /**
  * Count the elements of a list