From: Ben Pfaff Date: Sat, 20 Mar 2010 05:14:24 +0000 (-0700) Subject: bt: New function bt_is_empty(). X-Git-Tag: v0.7.5~92 X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8f4c7530a9eb87a21c39076c0d28962805f2b6ae;p=pspp-builds.git bt: New function bt_is_empty(). --- diff --git a/src/libpspp/bt.h b/src/libpspp/bt.h index 7045632e..0ee29898 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 */