From 8f4c7530a9eb87a21c39076c0d28962805f2b6ae Mon Sep 17 00:00:00 2001 From: Ben Pfaff Date: Fri, 19 Mar 2010 22:14:24 -0700 Subject: [PATCH] bt: New function bt_is_empty(). --- src/libpspp/bt.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/src/libpspp/bt.h b/src/libpspp/bt.h index 7045632ef2..0ee29898e8 100644 --- a/src/libpspp/bt.h +++ b/src/libpspp/bt.h @@ -1,5 +1,5 @@ /* PSPP - a program for statistical analysis. - Copyright (C) 2007, 2009 Free Software Foundation, Inc. + Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -23,6 +23,7 @@ balancing applied to the balanced tree, as its operation is fully encapsulated. */ +#include #include #include @@ -80,4 +81,11 @@ static inline size_t bt_count (const struct bt *bt) return bt->size; } +/* Return true if BT contains no nodes, + false if BT contains at least one node. */ +static inline bool bt_is_empty (const struct bt *bt) +{ + return bt->size == 0; +} + #endif /* libpspp/bt.h */ -- 2.30.2