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bt: New function bt_is_empty().
author
Ben Pfaff
<blp@cs.stanford.edu>
Sat, 20 Mar 2010 05:14:24 +0000
(22:14 -0700)
committer
Ben Pfaff
<blp@cs.stanford.edu>
Mon, 22 Mar 2010 04:07:16 +0000
(21:07 -0700)
src/libpspp/bt.h
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diff --git
a/src/libpspp/bt.h
b/src/libpspp/bt.h
index 7045632ef204e2edd228dc4dd8473174318212be..0ee29898e8263eeb434d8987192157c771fbb19a 100644
(file)
--- a/
src/libpspp/bt.h
+++ b/
src/libpspp/bt.h
@@
-1,5
+1,5
@@
/* PSPP - a program for statistical analysis.
/* 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
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. */
balancing applied to the balanced tree, as its operation is
fully encapsulated. */
+#include <stdbool.h>
#include <stddef.h>
#include <libpspp/cast.h>
#include <stddef.h>
#include <libpspp/cast.h>
@@
-80,4
+81,11
@@
static inline size_t bt_count (const struct bt *bt)
return bt->size;
}
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 */
#endif /* libpspp/bt.h */