more for mdb_cursor_count

return MDB_NOTFOUND if the cursor is empty

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 3e62b2e28f51adf16d0a1411b379ad9e808d5391..84477c428585303a5cd7edfdc63818f947ffd51f 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -6962,6 +6962,9 @@ mdb_cursor_count(MDB_cursor *mc, size_t *countp)
        if (!(mc->mc_flags & C_INITIALIZED))
                return EINVAL;
 
+       if (!mc->mc_snum || (mc->mc_flags & C_EOF))
+               return MDB_NOTFOUND;
+
        leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
        if (!F_ISSET(leaf->mn_flags, F_DUPDATA)) {
                *countp = 1;