strset: set errno to ENOENT even if we return NULL.

[ccan] / ccan / strset / strset.h

diff --git a/ccan/strset/strset.h b/ccan/strset/strset.h
index b8116c35c471813e5330d10b930aaaf82b26e69b..250ce7189614a357b89cb2bc7620283a2254caaa 100644 (file)
--- a/ccan/strset/strset.h
+++ b/ccan/strset/strset.h
@@ -52,7 +52,8 @@ static inline bool strset_empty(const struct strset *set)
  * @set: the set.
  * @member: the string to search for.
  *
  * @set: the set.
  * @member: the string to search for.
  *

- * Returns the member, or NULL if it isn't in the set.
+ * Returns the member, or NULL if it isn't in the set (and sets errno
+ * = ENOENT).

  *
  * Example:
  *     if (strset_test(&set, "hello"))
  *
  * Example:
  *     if (strset_test(&set, "hello"))


@@ -82,7 +83,9 @@ bool strset_set(struct strset *set, const char *member);
  * @set: the set.
  * @member: the string to remove from the set.
  *
  * @set: the set.
  * @member: the string to remove from the set.
  *

- * This returns the string which was passed to strset_set(), or NULL.
+ * This returns the string which was passed to strset_set(), or NULL if
+ * the string was not in the map (in which case it sets errno = ENOENT).
+ *

  * This means that if you allocated a string (eg. using strdup()), you can
  * free it here.
  *
  * This means that if you allocated a string (eg. using strdup()), you can
  * free it here.
  *