diff options
| -rw-r--r-- | src/search/tsearch_avl.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/search/tsearch_avl.c b/src/search/tsearch_avl.c index e4fb1316..57194c84 100644 --- a/src/search/tsearch_avl.c +++ b/src/search/tsearch_avl.c @@ -151,6 +151,8 @@ static struct node *remove(struct node **n, const void *k, void *tdelete(const void *restrict key, void **restrict rootp, int(*compar)(const void *, const void *)) { + if (!rootp) + return 0; struct node *n = *rootp; struct node *ret; /* last argument is arbitrary non-null pointer @@ -163,6 +165,8 @@ void *tdelete(const void *restrict key, void **restrict rootp, void *tfind(const void *key, void *const *rootp, int(*compar)(const void *, const void *)) { + if (!rootp) + return 0; return find(*rootp, key, compar); } @@ -171,6 +175,8 @@ void *tsearch(const void *key, void **rootp, { struct node *update; struct node *ret; + if (!rootp) + return 0; update = insert(*rootp, key, compar, &ret); if (update) *rootp = update; |